The document discusses various touchscreen technologies including resistive, capacitive, surface acoustic wave, optical, infrared, dispersive signal, and multi-touch. Resistive touchscreens work by detecting the contact between two flexible, resistive layers. Capacitive touchscreens use electrodes to detect changes in capacitance when a finger touches the screen. Surface acoustic wave touchscreens use ultrasonic waves that are absorbed at the touch location. Optical, infrared, and dispersive signal technologies detect touches using light beams or bending waves disrupted by a finger or stylus. Multi-touch allows recognition of multiple simultaneous touch points. New in-cell and on-cell technologies integrate touch components directly into display layers for thinner devices.
The document discusses touch screen technology. It describes how touch screens work by detecting touch input on a display, outlines different types of touch screen technologies including resistive, surface acoustic wave, infrared, and capacitive, and discusses some applications and advantages/disadvantages of touch screens. Future touch screen technologies aim to provide minimal power requirements, high accuracy, zero-pressure touch capability, and 100% display clarity. Touch screens are used widely in public, business, entertainment, and government applications and may replace mouse/keyboard inputs in the future.
This document provides an overview of different touchscreen technologies, including their pros and cons. It explains that resistive, surface acoustic wave, infrared beam break, surface capacitive, and projective capacitive are the major touch technologies used today. Each technology is described in terms of its construction, traits, and strengths and weaknesses compared to other technologies. The document concludes by comparing Baanto's ShadowSense touch technology to the other major technologies, highlighting how it improves on their limitations.
This document discusses touch screen technology. It begins with an introduction to touch screens and their history. It then describes the main components of a touch screen as the touch sensor, touch controller, and software driver. The document outlines several touch technologies including resistive, capacitive, surface acoustic wave, infrared, optical imaging, and acoustic pulse recognition. It lists applications such as public information displays, retail systems, and control systems. The document discusses advantages like ease of use and disadvantages like high costs. It concludes by mentioning future uses in video projectors and restaurants.
Touch screens work by detecting touch input on the screen. There are several touch screen technologies such as resistive, capacitive, surface acoustic wave, scanning infrared, and near field imaging. Resistive touch screens detect touch input through electrical contacts while capacitive screens detect changes in capacitance. Surface acoustic wave uses ultrasonic pulses while scanning infrared uses a grid of LEDs and detectors. Touch screens are used in a variety of applications including information kiosks, retail point-of-sale systems, museums, industrial controls, and more due to their user-friendly interface.
The document discusses the history and development of touchscreen technology. It describes Dr. Samuel Hurst inventing the first touch sensor called "Elograph" in 1971. It then discusses the four main types of touchscreen technologies - resistive, surface acoustic wave, capacitive, and infrared - providing details on how each works and their advantages and disadvantages. The document concludes that while touchscreens have some limitations, the technology is very user-friendly and has been widely accepted.
A touch screen is a computer display screen that is sensitive to human touch, allowing a user to interact with the computer by touching pictures or words on the screen.
In 1971, the first "Touch Sensor" was developed by Doctor Sam Hurst (founder of Elographics) while he was an instructor at the University of Kentucky.
Touch screen technology allows users to interact directly with digital devices by touching images or words on a display screen. There are several types of touch screen technologies including resistive, capacitive, surface acoustic wave, and infrared. Touch screens are now widely used in devices like smartphones, tablets, public kiosks and point-of-sale systems due to their simplicity and intuitiveness compared to traditional input methods like keyboards and mice.
The document discusses different types of touch screen technologies. It provides a brief history of touch screens, describing the first touch sensor developed in 1971 and first transparent touch screen in 1974. It then explains the basic components and functioning of touch screens, including touch sensors, controllers, and software drivers. The document goes on to describe various touch screen technologies like resistive, capacitive, surface wave, and infrared technologies; and their advantages and disadvantages. It concludes by discussing applications of touch screens in public displays, customer self-service, and other areas.
The document discusses touch screen technology. It describes how touch screens work by detecting touch input on a display, outlines different types of touch screen technologies including resistive, surface acoustic wave, infrared, and capacitive, and discusses some applications and advantages/disadvantages of touch screens. Future touch screen technologies aim to provide minimal power requirements, high accuracy, zero-pressure touch capability, and 100% display clarity. Touch screens are used widely in public, business, entertainment, and government applications and may replace mouse/keyboard inputs in the future.
This document provides an overview of different touchscreen technologies, including their pros and cons. It explains that resistive, surface acoustic wave, infrared beam break, surface capacitive, and projective capacitive are the major touch technologies used today. Each technology is described in terms of its construction, traits, and strengths and weaknesses compared to other technologies. The document concludes by comparing Baanto's ShadowSense touch technology to the other major technologies, highlighting how it improves on their limitations.
This document discusses touch screen technology. It begins with an introduction to touch screens and their history. It then describes the main components of a touch screen as the touch sensor, touch controller, and software driver. The document outlines several touch technologies including resistive, capacitive, surface acoustic wave, infrared, optical imaging, and acoustic pulse recognition. It lists applications such as public information displays, retail systems, and control systems. The document discusses advantages like ease of use and disadvantages like high costs. It concludes by mentioning future uses in video projectors and restaurants.
Touch screens work by detecting touch input on the screen. There are several touch screen technologies such as resistive, capacitive, surface acoustic wave, scanning infrared, and near field imaging. Resistive touch screens detect touch input through electrical contacts while capacitive screens detect changes in capacitance. Surface acoustic wave uses ultrasonic pulses while scanning infrared uses a grid of LEDs and detectors. Touch screens are used in a variety of applications including information kiosks, retail point-of-sale systems, museums, industrial controls, and more due to their user-friendly interface.
The document discusses the history and development of touchscreen technology. It describes Dr. Samuel Hurst inventing the first touch sensor called "Elograph" in 1971. It then discusses the four main types of touchscreen technologies - resistive, surface acoustic wave, capacitive, and infrared - providing details on how each works and their advantages and disadvantages. The document concludes that while touchscreens have some limitations, the technology is very user-friendly and has been widely accepted.
A touch screen is a computer display screen that is sensitive to human touch, allowing a user to interact with the computer by touching pictures or words on the screen.
In 1971, the first "Touch Sensor" was developed by Doctor Sam Hurst (founder of Elographics) while he was an instructor at the University of Kentucky.
Touch screen technology allows users to interact directly with digital devices by touching images or words on a display screen. There are several types of touch screen technologies including resistive, capacitive, surface acoustic wave, and infrared. Touch screens are now widely used in devices like smartphones, tablets, public kiosks and point-of-sale systems due to their simplicity and intuitiveness compared to traditional input methods like keyboards and mice.
The document discusses different types of touch screen technologies. It provides a brief history of touch screens, describing the first touch sensor developed in 1971 and first transparent touch screen in 1974. It then explains the basic components and functioning of touch screens, including touch sensors, controllers, and software drivers. The document goes on to describe various touch screen technologies like resistive, capacitive, surface wave, and infrared technologies; and their advantages and disadvantages. It concludes by discussing applications of touch screens in public displays, customer self-service, and other areas.
That is touch screen technology as everything (laptop,desktop,mobiles,ATM machine) each and everything can be used by touch.so how it works.Take a tour of uploaded ppt.
The document describes different types of touch screen technologies. It discusses how resistive, capacitive, infrared, surface acoustic wave (SAW), and projected capacitive touchscreens work. It explains that resistive touchscreens use electrically conductive and resistive layers separated by spacers, while capacitive and SAW touchscreens rely on changes in electrical fields when touched. The document provides brief summaries of each technology's characteristics.
Touchscreens work by detecting touch input on a clear glass panel through various technologies. Eric Johnson first described capacitive touchscreens in 1965, while Bent Stumpe developed early prototypes of resistive and capacitive touchscreens in the 1970s at CERN. The main touchscreen technologies are resistive, capacitive, projected capacitive, infrared, optical, and surface acoustic wave. Resistive touchscreens use two flexible layers separated by a gap, while capacitive uses electrodes and a controller to detect finger touch. Projected capacitive allows for multi-touch and works with thin gloves. Infrared uses light beams and optical sensors rather than an overlay.
The document provides information about different touchscreen technologies. It discusses resistive, capacitive, surface acoustic wave, and infrared touchscreen technologies. For each technology, it describes how touch detection works, examples of devices that use the technology, and pros and cons. The key points are that resistive touchscreens detect pressure, capacitive uses body conductivity, surface acoustic wave uses ultrasonic waves, and infrared detects infrared light disruption. The document is an overview of the main touchscreen types.
Touch screens work by detecting the location of a touch on their surface. There are several different technologies used in touch screens like resistive, capacitive, surface acoustic wave, scanning infrared, and near field imaging. Touch screens are widely used in applications like informational kiosks, trade show displays, point-of-sale terminals, industrial process controls, and to provide computer access for the physically disabled.
touch screen technology contains some limitations with it, it is fast, accurate, user friendly and fun to operate .It is being widely accepted. With some modifications, it can completely replace mouse and keyboard completely in the near future.
Shahrukh Mansuri ppt on touchscreen technology at spitmSpitm Mandleshwar
The document discusses four main types of touch screen technologies - resistive, capacitive, surface acoustic wave (SAW), and infrared/optical. Resistive screens use two conductive layers that create a circuit when touched, while capacitive screens use a single conductive layer and register touch through voltage changes. SAW screens use ultrasonic waves directed across the screen, while infrared/optical screens use LEDs and cameras. Each technology has advantages and disadvantages in cost, durability, light transmission quality, and ability to support multi-touch. Resistive and capacitive screens are most common in consumer devices, with capacitive generally providing better accuracy but only responding to conductive touches.
This document discusses different types of touch screen technologies, including resistive, capacitive, surface acoustic wave, infrared, and 3M Dispersive Signal Technology. It explains how each works at a high level, such as how resistive touch screens use electrically conductive layers separated by a gap, while capacitive screens detect changes in capacitance from a human touch. The document also covers multi-touch detection, advantages like fast input and ease of use, and disadvantages like potential finger stress.
The document discusses different types of touch screen technologies used in various applications. It describes resistive and capacitive touch screens used in point-of-sale systems, industrial controls, and public information displays. It also mentions infrared touch screens used in large plasma displays. Touch screens allow for intuitive navigation and are well-suited for applications where ease of use is important, such as kiosks, retail systems, and customer self-service.
This document discusses touch screen technology. It describes the basic components of a touchscreen - a touch sensor, controller, and software driver. It then explains the main touch screen technologies - resistive, capacitive, surface acoustic wave, and infrared. It discusses the characteristics of touchscreens like resolution, image quality, cost and durability. It provides examples of applications for touchscreens like public displays, retail systems, and mobile devices. Recent developments discussed include Microsoft Surface and Extreme Touch technology.
This document provides an overview of touchscreen technology. It begins with definitions of touchscreens and their ability to detect touch locations. Next, it discusses the history of touchscreen development from 1971-1983. Benefits of touchscreens are then outlined, such as intuitive use without training. The document proceeds to describe four main touchscreen technologies: resistive, capacitive, infrared, and surface acoustic wave. It explains the construction of a basic touchscreen including the touch sensor, controller, and software driver. Applications are listed in various industries. Disadvantages involve screen size and dirt. The conclusion discusses the growing adoption of touchscreens in devices and their potential to replace mice and keyboards.
This document provides an overview of touchscreen technology, including its history, components, types, and pros and cons. It discusses how the first touchscreen was developed in the 1960s and key developments in the 1970s. It describes the components of a basic touchscreen system and the four main types of touch sensor technologies: resistive, capacitive, surface acoustic wave, and infrared. Each technology is explained and compared in terms of durability, response time, advantages, and disadvantages. Potential applications and some pros and cons of touchscreen usage are also summarized.
A touch screen is an electronic display that can detect touch input. It allows direct interaction with what is displayed without needing an intermediate pointing device. The first touch screen was developed in the 1960s for air traffic control. Touch screens work by using touch sensors and controllers to detect touch locations and relay that information to software. Common touch screen technologies include resistive, surface acoustic wave, capacitive, infrared, and optical imaging. Touch screens are now widely used in devices like phones, tablets, and public information kiosks.
The document discusses touch screen technology used in mobile phones. It provides a brief history of touch screens beginning with their invention in 1971 and covers the first touch screen phone by Apple in 1983. The construction and four main types of touch screen technologies are defined - resistive, surface acoustic wave, capacitive, and infrared. Advantages and disadvantages of each technology are summarized along with the manufacturing process and overall advantages of touch screens.
Shudhanshu Agarwal presented on touch screen technology to Mr. Abhishek Srivastava. The presentation covered the introduction, history, working process, technologies including resistive, infrared, capacitive and surface acoustic wave, applications in games, smartphones, ATMs and more, as well as advantages like durability and disadvantages like sensitivity. The conclusion discussed how touch screens are simplifying input and replacing keyboards and mice in the future.
Touch screen technology allows users to interact directly with digital displays using only finger touches. There are three main types of touch screens: resistive, capacitive, and surface wave. Resistive touch screens use pressure, capacitive uses finger touch, and surface wave offers highest clarity but is most expensive. Touch screens are used for public displays, self-service kiosks, training, mobile devices, and assistive technologies. They provide simple, intuitive interfaces but can have short battery life and dirty screens. Overall, touch screens provide a user-friendly experience.
Touchscreen technology has evolved significantly over the past few decades and become widespread. There are several main touchscreen technologies including resistive, surface acoustic wave, infrared, and capacitive. Each technology has advantages and disadvantages related to durability, transparency, response time, and sensitivity to environmental factors. Touchscreens are now commonly used in applications such as public kiosks, point-of-sale systems, mobile devices, and more to provide an intuitive user interface.
The document describes different types of touchscreen technologies. It discusses the main components of a basic touchscreen which are the touch sensor, controller, and software driver. It then explains several common touch sensor technologies including resistive, capacitive, infrared, surface acoustic wave (SAW), and others. For each technology it provides details on how it works and its characteristics.
The document discusses different types of touch screen technologies. It describes resistive, capacitive, and surface wave touch screens. Resistive touch screens detect pressure on a conductive layer, but have low clarity. Capacitive touch screens store electrical charges and are more responsive, but are more expensive. Surface wave touch screens use ultrasonic waves and have high resolution, but must be touched with a soft stylus. The document provides details on the components, working principles, advantages, and applications of various touch screen technologies.
A touch screen consists of a clear glass panel with a touch-sensitive surface connected to a controller. The controller determines the type of interface needed and connects the touch screen to a PC. A driver software allows the touch screen and computer to communicate. There are different types of touch screen technologies including resistive, capacitive, surface acoustic wave, and infrared screens. Touch screens are used in public displays, customer self-service kiosks, and other applications where direct input is needed without keyboards or mice.
Touch screen technology allows users to interact directly with what is displayed on the screen by touching it with a finger or stylus. A touch screen includes a touch sensor panel, controller, and driver software. Touch screens were invented in the 1960s and work by detecting changes in signal or voltage at the location touched on the sensor. The main types are resistive, surface capacitive, projected capacitive, and infrared. Touch screens provide an intuitive interface and save space over physical buttons but can be harder to use in direct sunlight and get dirty. They are now widely used in devices, displays, self-service terminals and more.
That is touch screen technology as everything (laptop,desktop,mobiles,ATM machine) each and everything can be used by touch.so how it works.Take a tour of uploaded ppt.
The document describes different types of touch screen technologies. It discusses how resistive, capacitive, infrared, surface acoustic wave (SAW), and projected capacitive touchscreens work. It explains that resistive touchscreens use electrically conductive and resistive layers separated by spacers, while capacitive and SAW touchscreens rely on changes in electrical fields when touched. The document provides brief summaries of each technology's characteristics.
Touchscreens work by detecting touch input on a clear glass panel through various technologies. Eric Johnson first described capacitive touchscreens in 1965, while Bent Stumpe developed early prototypes of resistive and capacitive touchscreens in the 1970s at CERN. The main touchscreen technologies are resistive, capacitive, projected capacitive, infrared, optical, and surface acoustic wave. Resistive touchscreens use two flexible layers separated by a gap, while capacitive uses electrodes and a controller to detect finger touch. Projected capacitive allows for multi-touch and works with thin gloves. Infrared uses light beams and optical sensors rather than an overlay.
The document provides information about different touchscreen technologies. It discusses resistive, capacitive, surface acoustic wave, and infrared touchscreen technologies. For each technology, it describes how touch detection works, examples of devices that use the technology, and pros and cons. The key points are that resistive touchscreens detect pressure, capacitive uses body conductivity, surface acoustic wave uses ultrasonic waves, and infrared detects infrared light disruption. The document is an overview of the main touchscreen types.
Touch screens work by detecting the location of a touch on their surface. There are several different technologies used in touch screens like resistive, capacitive, surface acoustic wave, scanning infrared, and near field imaging. Touch screens are widely used in applications like informational kiosks, trade show displays, point-of-sale terminals, industrial process controls, and to provide computer access for the physically disabled.
touch screen technology contains some limitations with it, it is fast, accurate, user friendly and fun to operate .It is being widely accepted. With some modifications, it can completely replace mouse and keyboard completely in the near future.
Shahrukh Mansuri ppt on touchscreen technology at spitmSpitm Mandleshwar
The document discusses four main types of touch screen technologies - resistive, capacitive, surface acoustic wave (SAW), and infrared/optical. Resistive screens use two conductive layers that create a circuit when touched, while capacitive screens use a single conductive layer and register touch through voltage changes. SAW screens use ultrasonic waves directed across the screen, while infrared/optical screens use LEDs and cameras. Each technology has advantages and disadvantages in cost, durability, light transmission quality, and ability to support multi-touch. Resistive and capacitive screens are most common in consumer devices, with capacitive generally providing better accuracy but only responding to conductive touches.
This document discusses different types of touch screen technologies, including resistive, capacitive, surface acoustic wave, infrared, and 3M Dispersive Signal Technology. It explains how each works at a high level, such as how resistive touch screens use electrically conductive layers separated by a gap, while capacitive screens detect changes in capacitance from a human touch. The document also covers multi-touch detection, advantages like fast input and ease of use, and disadvantages like potential finger stress.
The document discusses different types of touch screen technologies used in various applications. It describes resistive and capacitive touch screens used in point-of-sale systems, industrial controls, and public information displays. It also mentions infrared touch screens used in large plasma displays. Touch screens allow for intuitive navigation and are well-suited for applications where ease of use is important, such as kiosks, retail systems, and customer self-service.
This document discusses touch screen technology. It describes the basic components of a touchscreen - a touch sensor, controller, and software driver. It then explains the main touch screen technologies - resistive, capacitive, surface acoustic wave, and infrared. It discusses the characteristics of touchscreens like resolution, image quality, cost and durability. It provides examples of applications for touchscreens like public displays, retail systems, and mobile devices. Recent developments discussed include Microsoft Surface and Extreme Touch technology.
This document provides an overview of touchscreen technology. It begins with definitions of touchscreens and their ability to detect touch locations. Next, it discusses the history of touchscreen development from 1971-1983. Benefits of touchscreens are then outlined, such as intuitive use without training. The document proceeds to describe four main touchscreen technologies: resistive, capacitive, infrared, and surface acoustic wave. It explains the construction of a basic touchscreen including the touch sensor, controller, and software driver. Applications are listed in various industries. Disadvantages involve screen size and dirt. The conclusion discusses the growing adoption of touchscreens in devices and their potential to replace mice and keyboards.
This document provides an overview of touchscreen technology, including its history, components, types, and pros and cons. It discusses how the first touchscreen was developed in the 1960s and key developments in the 1970s. It describes the components of a basic touchscreen system and the four main types of touch sensor technologies: resistive, capacitive, surface acoustic wave, and infrared. Each technology is explained and compared in terms of durability, response time, advantages, and disadvantages. Potential applications and some pros and cons of touchscreen usage are also summarized.
A touch screen is an electronic display that can detect touch input. It allows direct interaction with what is displayed without needing an intermediate pointing device. The first touch screen was developed in the 1960s for air traffic control. Touch screens work by using touch sensors and controllers to detect touch locations and relay that information to software. Common touch screen technologies include resistive, surface acoustic wave, capacitive, infrared, and optical imaging. Touch screens are now widely used in devices like phones, tablets, and public information kiosks.
The document discusses touch screen technology used in mobile phones. It provides a brief history of touch screens beginning with their invention in 1971 and covers the first touch screen phone by Apple in 1983. The construction and four main types of touch screen technologies are defined - resistive, surface acoustic wave, capacitive, and infrared. Advantages and disadvantages of each technology are summarized along with the manufacturing process and overall advantages of touch screens.
Shudhanshu Agarwal presented on touch screen technology to Mr. Abhishek Srivastava. The presentation covered the introduction, history, working process, technologies including resistive, infrared, capacitive and surface acoustic wave, applications in games, smartphones, ATMs and more, as well as advantages like durability and disadvantages like sensitivity. The conclusion discussed how touch screens are simplifying input and replacing keyboards and mice in the future.
Touch screen technology allows users to interact directly with digital displays using only finger touches. There are three main types of touch screens: resistive, capacitive, and surface wave. Resistive touch screens use pressure, capacitive uses finger touch, and surface wave offers highest clarity but is most expensive. Touch screens are used for public displays, self-service kiosks, training, mobile devices, and assistive technologies. They provide simple, intuitive interfaces but can have short battery life and dirty screens. Overall, touch screens provide a user-friendly experience.
Touchscreen technology has evolved significantly over the past few decades and become widespread. There are several main touchscreen technologies including resistive, surface acoustic wave, infrared, and capacitive. Each technology has advantages and disadvantages related to durability, transparency, response time, and sensitivity to environmental factors. Touchscreens are now commonly used in applications such as public kiosks, point-of-sale systems, mobile devices, and more to provide an intuitive user interface.
The document describes different types of touchscreen technologies. It discusses the main components of a basic touchscreen which are the touch sensor, controller, and software driver. It then explains several common touch sensor technologies including resistive, capacitive, infrared, surface acoustic wave (SAW), and others. For each technology it provides details on how it works and its characteristics.
The document discusses different types of touch screen technologies. It describes resistive, capacitive, and surface wave touch screens. Resistive touch screens detect pressure on a conductive layer, but have low clarity. Capacitive touch screens store electrical charges and are more responsive, but are more expensive. Surface wave touch screens use ultrasonic waves and have high resolution, but must be touched with a soft stylus. The document provides details on the components, working principles, advantages, and applications of various touch screen technologies.
A touch screen consists of a clear glass panel with a touch-sensitive surface connected to a controller. The controller determines the type of interface needed and connects the touch screen to a PC. A driver software allows the touch screen and computer to communicate. There are different types of touch screen technologies including resistive, capacitive, surface acoustic wave, and infrared screens. Touch screens are used in public displays, customer self-service kiosks, and other applications where direct input is needed without keyboards or mice.
Touch screen technology allows users to interact directly with what is displayed on the screen by touching it with a finger or stylus. A touch screen includes a touch sensor panel, controller, and driver software. Touch screens were invented in the 1960s and work by detecting changes in signal or voltage at the location touched on the sensor. The main types are resistive, surface capacitive, projected capacitive, and infrared. Touch screens provide an intuitive interface and save space over physical buttons but can be harder to use in direct sunlight and get dirty. They are now widely used in devices, displays, self-service terminals and more.
This document provides an overview of different touch screen technologies, including resistive, capacitive, surface acoustic wave, infrared, optical imaging, and multi-touch technologies. It discusses the basic structures and working principles of resistive and capacitive touchscreens. The document also compares various touch screen technologies based on factors like light transmittance, durability, stylus flexibility, applications, and cost. It concludes by examining market trends in touch screen technologies and envisions the future development in this field.
Touchscreens differ from other input devices in that they require no special commands to learn, allow users to interact directly on the screen without looking away, and only offer valid selectable options. The basic components of a touchscreen are a touch sensor layered over the display, a controller that translates signals from the sensor, and a software driver that allows the computer's operating system to interpret touch events. The main types of touch technologies are resistive, capacitive, surface acoustic wave, infrared, and others. Resistive screens work via pressure while capacitive screens rely on finger capacitance, with capacitive providing better accuracy, multi-touch capability, and durability.
The document discusses touch screen technology. It provides an overview of the group members working on the project, objectives of the document, introduction to touch screens including their history and applications. The key technologies used in touch screens are described along with advantages like intuitive interfaces and disadvantages like fingerprints. Examples of popular touch screen devices are given and the large and growing touch screen market is highlighted. The document concludes by noting how touch screens are becoming more widely used and replacing other input devices.
This document provides an overview of broadband and DSL technology. It discusses how broadband provides high-speed internet access from 256 kbps to several mbps. It then describes ADSL technology, how it works by splitting bandwidth on copper telephone lines into channels for upstream, downstream, and voice. The document outlines the various components used in broadband networks like DSLAMs, BRAS, CPE, and discusses how they connect and function. It also lists some services that can be accessed through broadband like video and audio on demand. In closing, it mentions how broadband can help bridge the digital divide and strengthen education through improved internet access.
1. The document lists over 100 potential seminar topics in computer science and information technology, ranging from embedded systems and extreme programming to biometrics, quantum computing, and more.
2. Some examples include elastic quotas, electronic ink, gesture recognition, graphics processing units, grid computing, and honeypots.
3. The broad range of topics provide many options for students or professionals to explore emerging technologies and issues in computing.
This document discusses the history and techniques of phishing attacks. It notes that phishing originated in the 1990s as a way to steal AOL account passwords but has since evolved to target banks, PayPal, and other financial institutions to steal credit card numbers and bank account credentials. Modern phishing uses official-looking websites, email messages, links, and social engineering to trick users into providing sensitive information. The document recommends ways for individuals and businesses to protect themselves, including being wary of unsolicited messages requesting personal details, verifying website URLs, keeping software updated, and reporting suspicious activity.
Touch screens can detect the presence and location of touch within the display area. There are four main touch screen technologies: resistive, capacitive, surface acoustic wave, and infrared/optical. Resistive screens use two conductive layers that create a circuit when touched. Capacitive screens use glass with a conductive layer and detect minute currents from a touch. Surface acoustic wave screens use ultrasonic waves disrupted by touch. Infrared/optical screens use LEDs and cameras to detect touches interrupting the LEDs. Touch screens enable direct interaction with displays and are found in devices like phones, games, and kiosks.
N.B- {"Thanks to All the people whose paper helped me a lot to make this presentation."}
Advances in the field of Information Technology also make Information Security an inseparable part of it. In order to deal with security, Authentication plays an important role. This paper presents a review on the biometric authentication techniques and some future possibilities in this field. In biometrics, a human being needs to be identified based on some characteristic physiological parameters. A wide variety of systems require reliable personal recognition schemes to either confirm or determine the identity of an individual requesting their services. The purpose of such schemes is to ensure that the rendered services are accessed only by a legitimate user, and not anyone else. By using biometrics it is possible to confirm or establish an individual’s identity. The position of biometrics in the current field of Security has been depicted in this work. We have also outlined opinions about the usability of bio-metric authentication systems, comparison between different techniques and their advantages and disadvantages in this paper.
email - astractremon@gmail.com
I am Adoitya Kaila .a student of management.here I am presnting a presentation on biometric technology which is considered the most reliable source of security in todays time.i have tried to make it simple for each and everyone .
This document discusses multi-touch technology, which allows multiple touch points to be recognized simultaneously. It describes how multi-touch uses Frustrated Total Internal Reflection (FTIR) to sense touch points through infrared light reflection. FTIR multi-touch works by generating an infrared light mesh on the screen and using a camera to detect where light is frustrated by touch points. This provides a simple and inexpensive way to enable high-resolution multi-touch sensing. The document outlines some applications of multi-touch technology including personal computers, mobile phones, and interactive tabletop displays.
1. The document lists over 100 potential seminar topics in computer science and information technology, ranging from embedded systems and extreme programming to biometrics, quantum computing, and more.
2. Some examples include elastic quotas, electronic ink, gesture recognition, graphics processing units, grid computing, and honeypots.
3. The broad range of topics provide many options for students or professionals to explore emerging technologies and issues in computing.
Biometric technology uses unique human characteristics to identify or verify individuals. Common biometrics include fingerprints, iris patterns, voice recognition and hand geometry. The history of biometrics began in the 1850s with fingerprint identification. A biometric system works by capturing a sample, extracting features, creating a template and matching it to existing templates. Benefits are that biometrics cannot be lost or stolen, while disadvantages include privacy issues and reliability depending on environmental factors. Current applications include border control, driver's licenses, banking and access control. Biometrics is expected to grow in use for security and transactions.
The document discusses IP Telephony and the H.323 standard. It describes how IP Telephony uses the internet protocol to send audio, video, and data in real-time. The H.323 standard specifies protocols for multimedia communications over packet-based networks, including signaling protocols for call setup and control, as well as protocols for audio and video transport. The document outlines the components, protocols, call flows, and benefits of IP Telephony and the H.323 standard.
The document discusses display devices and touch screen technology. It describes the key components and working principles of different display devices like CRT, LED, and LCD displays. It also explains the components of a touch screen like the touch sensor, controller, and software driver. Finally, it summarizes the working principles and characteristics of different touch screen technologies such as resistive, capacitive, SAW, and infrared touchscreens.
This document provides an overview of biometrics technologies. It begins with an introduction to biometrics and then discusses the history of biometrics from ancient Egyptians and Chinese using fingerprints to modern systems being developed in the 1970s. The document outlines key characteristics biometrics must have such as universality and permanence. It then classifies and describes various biometric technologies including fingerprint, face, iris, voice, and signature recognition. Application examples are presented for areas like gaming, television control, and accessibility switches. The document concludes that biometrics provide a user-friendly way to interact with devices without passwords while continuing to develop as an emerging field.
Multi touch screen technology allows users to interact directly with digital content on a screen using multiple simultaneous finger touches. It recognizes differences in touch points and gestures like swiping and pinching. Multi touch screens are made of layers that can detect electrical charges from fingers. They are used in devices like phones and tables and allow for richer interaction than single-point devices. Applications include maps, photos, and games where users can directly manipulate content with gestures. While more flexible than other inputs, multi touch screens are still more expensive and may not be suitable for long data entry.
The document discusses different types of touch screen technologies, including resistive, capacitive, surface acoustic wave, and infrared screens. It describes the key components of a touchscreen system and how each technology detects and locates touch input. Resistive and capacitive screens are the most common. The document also outlines common applications of touchscreens and concludes that the market continues to grow as touch sensors are integrated into more display products.
A touchscreen has three main components: a touch sensor, controller, and software driver. The touch sensor detects touch input and sends it to the controller, which translates it for the computer. The driver allows the computer's operating system to interpret touch events. There are several types of touch sensor technologies, including resistive, capacitive, infrared, and surface acoustic wave, which work using different detection methods like changes in electrical signals or light beams.
The document discusses different types of touch screen technologies, including resistive, capacitive, infrared, and surface acoustic wave touchscreens. It describes the basic components and working principles of each type. Resistive touchscreens work by detecting changes in electrical current caused by touch. Capacitive screens detect capacitance changes from a finger. Infrared touchscreens use a light beam grid disrupted by touch. Surface acoustic wave screens detect finger absorption of ultrasonic waves. The document provides advantages and disadvantages of each approach.
Touch technology has evolved from early resistive touch screens to modern capacitive touch screens. Resistive touch screens use two electrically conductive layers separated by an insulator that complete a circuit when touched. Capacitive touch screens use coatings of indium tin oxide that detect changes in capacitance when touched. Projected capacitive touch allows more accurate multi-touch detection through etching conductive layers into grids. Infrared and surface acoustic wave touch screens use optical and ultrasonic methods respectively to detect touches. Gestural interfaces can interpret hand and finger motions through technologies like data gloves, depth cameras, and controllers. Common touch gestures include taps, swipes, pinches, and rotations. Prolonged vertical touch screen use can cause fatigue
This document discusses touch screen technology. It provides a brief history of touch screens beginning in 1971. It then describes the main components of a touch screen - the touch sensor, controller, and software driver. The document outlines several common touch screen technologies including resistive, capacitive, surface wave, infrared, and dispersive signal. It concludes by noting the wide applications of touch screens in public displays, customer self-service, and more.
Rajesh Kumar Sahoo submitted a seminar on touch screen and touchless technology. The document defines touch screens as input devices that allow users to interact directly with displayed content by touching the screen. It discusses the history and development of touch screens, including the first touch screen created in 1971. The document outlines different touch screen technologies like resistive, capacitive, surface acoustic wave, and infrared. It also covers the components and working of touch screen systems. Applications of touch screens and touchless technology are presented, along with their advantages and disadvantages. The conclusion is that touch systems are growing but touchless technology is still being developed for high precision input.
Touch screens work by detecting touch input on a display screen. There are several types of touch screen technologies but the most common are resistive, capacitive, surface acoustic wave, and infrared. Resistive touch screens detect touch based on electrical currents while capacitive uses electric fields. Surface acoustic wave uses ultrasonic waves and infrared uses infrared light beams. Touch screens are used in devices like smartphones, tablets, ATMs and more because they provide an intuitive interface without needing other input devices.
A touchscreen is an electronic visual display that the user can control through simple or multi-touch gestures by touching the screen with a special stylus/pen and-or one or more fingers.
Study of Various Touch Screen TechnologiesSantosh Ankam
Study of different types of touch screen technologies, their history, advantages, disadvantages, working, functionalities, comparison, examples, components, hardware, explanations, future scope, pro and cons.
Explains about touch screen sensor and its operation with the controller, types of touch sensor and its differentiation, advantages & disadvantages and its applications in day today life.
The document summarizes four main touchscreen display technologies: resistive, capacitive, surface acoustic wave, and infrared. Resistive touchscreens use two flexible surfaces that create resistance when touched. Capacitive screens detect finger proximity to change the electric field. Surface acoustic wave uses ultrasonic waves that are disrupted by touch. Infrared touchscreens use beams of light interrupted by a finger or stylus. Each technology has advantages like cost, clarity or sensitivity, and disadvantages like durability or activation method.
Touch screen technology allows direct manipulation of digital content on a screen without physical buttons or keys. It detects touch input from fingers or passive objects. There are four main types of touchscreen technologies: resistive, capacitive, surface acoustic wave, and infrared. Touch screens provide advantages like replacing keyboards/mice, intuitive interaction, space savings, durability, and accessibility. However, disadvantages include difficulty entering large amounts of data, potential performance issues if not designed well, and higher costs compared to traditional computers.
Resistive, capacitive, infrared, and SAW are the main types of touch screen technologies. Resistive touch screens use two electrically conductive layers separated by a gap, such that a touch causes a change in electrical current. Capacitive touch screens use a transparent conductor coated glass and detect changes in capacitance from a human touch. Infrared touch screens use an array of infrared beams to detect touch disruptions. SAW touch screens use ultrasonic waves absorbed by a touch. Each technology has advantages like cost, accuracy, and durability, as well as disadvantages such as sensitivity to liquids or lack of multi-touch support.
Resistive, capacitive, infrared, and SAW are the main types of touch screen technologies. Resistive touch screens use two electrically conductive layers separated by a small gap, detecting input by completing a circuit. Capacitive screens use a transparent conductor like ITO and detect input through electrostatic field distortion. Infrared screens use an array of IR LEDs and detectors to detect input disrupting the beam pattern. SAW screens use ultrasonic waves absorbed by touch input. Each technology has advantages like cost, accuracy, or compatibility with various inputs, as well as disadvantages like durability, resolution, or sensitivity to environmental factors.
This document provides an overview of touch screen technology, including:
- A brief history starting with the first touch screen developed in 1971 and key developments since then.
- The main components of a touch screen including the touch sensor, controller, and software drivers.
- The main types of touch screen technologies - resistive, capacitive, and infrared.
- The advantages and disadvantages of each technology.
- Common applications of touch screens including mobile phones, tablets, ATMs, and more.
This document discusses different types of touch screen technologies, including resistive, capacitive, surface acoustic wave (SAW), and infrared/optical. Resistive touch screens use layers separated by a small space that complete a circuit when touched. Capacitive screens have a conductive coating and detect touch through changes in capacitance. SAW screens use ultrasonic waves that are absorbed by a touch. Infrared/optical screens use LEDs and cameras to detect interrupts from a touch. Capacitive and infrared/optical screens can support multi-touch and have higher durability, while resistive screens are lowest cost but can only detect single touches.
A touch screen uses a sensitive glass overlay and touch detection technology to allow users to input commands by touching the screen. There are three main types of touch screen technologies: resistive, capacitive, and surface acoustic. Resistive touchscreens use pressure to detect input while capacitive screens detect changes in capacitance from a finger touch. Capacitive screens are now more common due to their clear images, multi-touch detection, and ease of use, but are more expensive to produce.
1) Touch screens work by detecting changes in electrical signals or light beams when a user touches the screen.
2) The first touch screen was developed in 1971 and incorporated a transparent surface in 1974.
3) There are several types of touch screen technologies including resistive, capacitive, infrared, and surface wave technologies, each with their own advantages and disadvantages related to durability, accuracy, and input detection.
Touch screen technology | touch screen in moti nagar |rstrainings4
Touch screen Technology is widely used in moti nagar, through this junior scientists are widely reforming from the place called moti nagar, Erragadda, Hyderabad.
The simplified electron and muon model, Oscillating Spacetime: The Foundation...RitikBhardwaj56
Discover the Simplified Electron and Muon Model: A New Wave-Based Approach to Understanding Particles delves into a groundbreaking theory that presents electrons and muons as rotating soliton waves within oscillating spacetime. Geared towards students, researchers, and science buffs, this book breaks down complex ideas into simple explanations. It covers topics such as electron waves, temporal dynamics, and the implications of this model on particle physics. With clear illustrations and easy-to-follow explanations, readers will gain a new outlook on the universe's fundamental nature.
Strategies for Effective Upskilling is a presentation by Chinwendu Peace in a Your Skill Boost Masterclass organisation by the Excellence Foundation for South Sudan on 08th and 09th June 2024 from 1 PM to 3 PM on each day.
বাংলাদেশের অর্থনৈতিক সমীক্ষা ২০২৪ [Bangladesh Economic Review 2024 Bangla.pdf] কম্পিউটার , ট্যাব ও স্মার্ট ফোন ভার্সন সহ সম্পূর্ণ বাংলা ই-বুক বা pdf বই " সুচিপত্র ...বুকমার্ক মেনু 🔖 ও হাইপার লিংক মেনু 📝👆 যুক্ত ..
আমাদের সবার জন্য খুব খুব গুরুত্বপূর্ণ একটি বই ..বিসিএস, ব্যাংক, ইউনিভার্সিটি ভর্তি ও যে কোন প্রতিযোগিতা মূলক পরীক্ষার জন্য এর খুব ইম্পরট্যান্ট একটি বিষয় ...তাছাড়া বাংলাদেশের সাম্প্রতিক যে কোন ডাটা বা তথ্য এই বইতে পাবেন ...
তাই একজন নাগরিক হিসাবে এই তথ্য গুলো আপনার জানা প্রয়োজন ...।
বিসিএস ও ব্যাংক এর লিখিত পরীক্ষা ...+এছাড়া মাধ্যমিক ও উচ্চমাধ্যমিকের স্টুডেন্টদের জন্য অনেক কাজে আসবে ...
This presentation was provided by Steph Pollock of The American Psychological Association’s Journals Program, and Damita Snow, of The American Society of Civil Engineers (ASCE), for the initial session of NISO's 2024 Training Series "DEIA in the Scholarly Landscape." Session One: 'Setting Expectations: a DEIA Primer,' was held June 6, 2024.
ISO/IEC 27001, ISO/IEC 42001, and GDPR: Best Practices for Implementation and...PECB
Denis is a dynamic and results-driven Chief Information Officer (CIO) with a distinguished career spanning information systems analysis and technical project management. With a proven track record of spearheading the design and delivery of cutting-edge Information Management solutions, he has consistently elevated business operations, streamlined reporting functions, and maximized process efficiency.
Certified as an ISO/IEC 27001: Information Security Management Systems (ISMS) Lead Implementer, Data Protection Officer, and Cyber Risks Analyst, Denis brings a heightened focus on data security, privacy, and cyber resilience to every endeavor.
His expertise extends across a diverse spectrum of reporting, database, and web development applications, underpinned by an exceptional grasp of data storage and virtualization technologies. His proficiency in application testing, database administration, and data cleansing ensures seamless execution of complex projects.
What sets Denis apart is his comprehensive understanding of Business and Systems Analysis technologies, honed through involvement in all phases of the Software Development Lifecycle (SDLC). From meticulous requirements gathering to precise analysis, innovative design, rigorous development, thorough testing, and successful implementation, he has consistently delivered exceptional results.
Throughout his career, he has taken on multifaceted roles, from leading technical project management teams to owning solutions that drive operational excellence. His conscientious and proactive approach is unwavering, whether he is working independently or collaboratively within a team. His ability to connect with colleagues on a personal level underscores his commitment to fostering a harmonious and productive workplace environment.
Date: May 29, 2024
Tags: Information Security, ISO/IEC 27001, ISO/IEC 42001, Artificial Intelligence, GDPR
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How to Build a Module in Odoo 17 Using the Scaffold MethodCeline George
Odoo provides an option for creating a module by using a single line command. By using this command the user can make a whole structure of a module. It is very easy for a beginner to make a module. There is no need to make each file manually. This slide will show how to create a module using the scaffold method.
Thinking of getting a dog? Be aware that breeds like Pit Bulls, Rottweilers, and German Shepherds can be loyal and dangerous. Proper training and socialization are crucial to preventing aggressive behaviors. Ensure safety by understanding their needs and always supervising interactions. Stay safe, and enjoy your furry friends!
Introduction to AI for Nonprofits with Tapp NetworkTechSoup
Dive into the world of AI! Experts Jon Hill and Tareq Monaur will guide you through AI's role in enhancing nonprofit websites and basic marketing strategies, making it easy to understand and apply.
Exploiting Artificial Intelligence for Empowering Researchers and Faculty, In...Dr. Vinod Kumar Kanvaria
Exploiting Artificial Intelligence for Empowering Researchers and Faculty,
International FDP on Fundamentals of Research in Social Sciences
at Integral University, Lucknow, 06.06.2024
By Dr. Vinod Kumar Kanvaria
2. RESISTIVE TOUCHSCREEN
The two sheets are coated with resistive substance, usually a metal
compound called Indium Tin Oxide (ITO). The ITO is thinly and uniformly
sputtered onto both the glass and the PET (Polyethylene terephthalate)
layer. Tiny bumps called spacer dots are then added to the glass
side, on top of the resistive ITO coating, to keep the PET film from
sagging, causing an accidental or false touch.
When the PET film is pressed down, the two resistive surfaces meet.
The position of this meeting (a touch) can be read by a touchscreen
controller circuit.
5. Advantages:
• Most widely used touch technology
• Can be activated by bare finger, gloved hand, or stylus
• Low cost
Disadvantages:
• Top sheet is highly susceptible to scratches, cuts and cigarette burns
• Layer is a flexing mechanical element coated with a conductive
ceramic which wears with every flex
• Transmission typically in 80% to 85%
TOUCHSCREEN TECHNOLOGY
6. SURFACE CAPACITIVE TOUCHSCREEN
• Four multi-layer glass.
• The two sides of the glass substrate
are coated with uniform conductive
ITO (indium tin oxide) coating.
• The thickness of 0.0015 millimeter
silicon dioxide hard coating are
coated on the front side of ITO
coating layer.
• There are electrodes on the four
corners for launching electric
current.
TOUCHSCREEN TECHNOLOGY
7. WORKING PRINCIPLE
Small amount of voltage is applied to the
electrodes on the four corners. A human
body is an electric conductor, so when
you touch the screen with a finger, a slight
amount of current is drawn, creating a
voltage drop. The current respectively
drifts to the electrodes on the four
corners. Theoretically, the amount of
current that drifts through the four
electrodes should be proportional to the
distance from the touch point to the four
corners.
The controller precisely
calculates the proportion of the current
passed through the four electrodes and
figures out the X/Y coordinate of a touch
point.
TOUCHSCREEN TECHNOLOGY
8. Advantages:
• Can be used to register touch on a sensor surface through a glass
window.
• Capacitive touch screen withstand contaminants such as
grease, dirt, water, running liquid, harsh chemicals and can be NEMAsealed.
• The life expectancy is over 225 million mechanical touches.
• Capacitive technology transmits around 90% percent of the light from
the screen.
• Life span of more than more than 50 million touches in one location.
• Technology with fastest touch response time
Disadvantages:
• Limited to 1 resolvable touch point
• Can only register the touch of ungloved fingers or tethered stylus on a
sensors surface.
• Sensitive for electromagnetic interference.
• Severe scratch can affect operation within the damaged area
TOUCHSCREEN TECHNOLOGY
9. PROJECTED CAPACITIVE TOUCH:
Projected Capacitive Touch (PCT) technology is a capacitive technology which
permits more accurate and flexible operation, by etching the conductive layer. An
XY array is formed either by etching a single layer to form a grid pattern of
electrodes, or by etching two separate, perpendicular layers of conductive material
with parallel lines or tracks to form the grid (comparable to the pixel grid found in
many LCD displays).
TOUCHSCREEN TECHNOLOGY
10. WORKING PRINCIPLE
Applying voltage to the array creates a grid
of capacitors. Bringing a finger or
conductive stylus close to the surface of
the sensor changes the local electrostatic
field. The capacitance change at every
individual point on the grid can be
measured to accurately determine the
touch location. The use of a grid permits a
higher resolution than resistive technology
and also allows multi-touch operation. The
greater resolution of PCT allows operation
without direct contact, such that the
conducting layers can be coated with
further protective insulating layers, and
operate even under screen protectors, or
behind weather and vandal-proof glass.
TOUCHSCREEN TECHNOLOGY
11. Advantages:
• Touch
function
operates
through
customer-installed
materials, including vandal-resistant glass up to 18 mm thick.
• Works outdoors-in rain, snow, ice, and dust.
• True flat front surface possible with no bezel.
• Works with fingers, gloved hands or conductive stylus.
• Works even if glass is scratched or broken.
Disadvantages:
• More complex electronics and sensor construction when compared to
other technologies
• Does not have full stylus independence support
TOUCHSCREEN TECHNOLOGY
12. SURFACE ACOUSTIC WAVE
With Surface Acoustic Wave (SAW,)
piezoelectric transducers located at
different positions of the screen are
used to turn the waves of mechanical
energy of a touch (vibration) into an
electronic signal. The waves are
spread across the screen by
bouncing off reflector arrays along
the edges of the overlay and are
detected by two "receivers". The
acoustic wave weakens when the
user touches the glass with their
finger, gloved hand or soft stylus.
The coordinates are then determined
by the controller circuitry that
measures the time at which the
amplitude declines.
TOUCHSCREEN TECHNOLOGY
13. WORKING:
When the panel is touched, a portion of the wave is absorbed. This change
in the ultrasonic waves registers the position of the touch event and sends
this information to the controller for processing. When sound waves are
transmitted across the surface of the display, the following sequence of
events occurs:
• Each wave is spread across the screen by bouncing off reflector arrays
along the edges of the overlay.
• Two receivers detect the waves.
• When the user touches the glass surface, the user's finger absorbs
some of the energy of the acoustic wave and the controller circuitry
measures the touch location.
TOUCHSCREEN TECHNOLOGY
14. Advantages:
• No touch overlay or coating required, so no layers that can be worn.
• No brightness or contrast loss, SAW offers superior image clarity and
high light transmission.
• Screen can be operated by with a finger, gloved hand (cloth, leather, or
rubber), leather or soft stylus. Something hard like a pen doesn't work.
• Durable, scratch-resistant glass surface, continues to work if
scratched.
• Vandalism proof, when protected glass is used.
• Antiglare glass option.
• Very long life span. Tested on more than 50 million touches at a single
location.
Disadvantages:
• The touch screen is not completely sealable, can be affected by large
amounts of dirt, dust, and/or water in the environment.
• Display surface needs to be slightly sunk from its mounting bezel
TOUCHSCREEN TECHNOLOGY
15. Acoustic pulse recognition
Acoustic
pulse
recognition
(APR) utilizes one pane of
glass with one transducer in
each corner. When touch
occurs, mechanical energy
(bending waves) radiates from
the touch location and is
detected by the transducers.
The transducers pinpoint the
touch location by generating a
unique sound for that location
on the glass.
TOUCHSCREEN TECHNOLOGY
16. WORKING
The acoustic pulse recognition (APR) consists of a glass
overlay with four piezoelectric transducers attached to the back
surface.
The transducers pick up the acoustic wave generated upon a
touch, and convert it to an electronic signal. The signal is then
digitized by the controller and compared to a prerecorded
acoustic profile for every position on the glass. The cursor
position is instantly updated to the touch location.
TOUCHSCREEN TECHNOLOGY
17. Advantages:
•
•
•
•
•
•
•
•
•
•
•
•
Optics and durability of pure glass
Works with finger, glove, pen, credit card, fingernail
Resistant to water, dust, grease
No wear-out mechanism
Works even with scratches
Excellent drag performance
Sealable to NEMA 4/IP65 standards
One time factory calibration, no drift
Thin borders—only 5mm
True flat surface
Disadvantages:
Small and large sizes
Palm rejection
• Touchscreen
Mounting
Essential
• Not a True Multi-Touch
TOUCHSCREEN TECHNOLOGY
is
18. OPTICAL TOUCH
Optical touch is the technique of
using infrared (IR) LED lighting to
irradiate a sensing area. Intersecting
the area reflects back the IR light to
camera to detect fingers. Via precise
calculation, system will get the
coordinates of the fingers caught by
camera. This technique is very
suitable for large scale touch
displays. With this technology, the
accuracy and system speed is
perfect, and multi touch function is
also available.
19. WORKING
Working in concert, optical sensors
located around the perimeter of the screen
track the movement of any object close to
the surface by detecting the interruption of
an infra-red light source. The light is
emitted in a plane across the surface of
the screen and can be either active (infrared LED) or passive (special reflective
surfaces). At the heart of the system is a
printed circuit controller board that
receives signals from the optical sensors.
Its software then compensates for optical
distortions and triangulates the position of
the touching object with extreme accuracy.
TOUCHSCREEN TECHNOLOGY
20. Advantages:
• 100% light transmission (not an overlay)
• Accurate
• Can be retro-fitted to any existing large format LCD or Plasma
display
• Can be used with finger, gloved hand or stylus
• Requires only one calibration
• Plug and play - no software drivers
Disadvantages:
•
•
•
•
Susceptible to “Ghosting” (Motion blur)
Can Be Affected by Direct Sunlight
Frame increases overall depth of monitor
Cannot be fitted to plasma and LCD displays with
integrated speakers
TOUCHSCREEN TECHNOLOGY
21. INFRARED TOUCH
Infrared technology relies on the interruption of
an IR light grid in front of the display screen. The
touch frame or opto-matrix frame contains a row
of IR-light emitting diodes (LEDs) and photo
transistors, each mounted on two opposite sides
to create a grid of invisible infrared light. The
frame assembly is comprised of PCBs on which
the opto electronics are mounted and are
concealed behind a IR-transparent bezel which
shields the opto’s from the operating
environment whilst allowing the IR beams to
pass through. When touching the screen one or
more of the beams are obstructed resulting in an
X and a Y coordinate being sent to the control
electronics to indicate the exact touch point.
TOUCHSCREEN TECHNOLOGY
22. Advantages:
•
•
•
100% light transmission since no overlay covering the display screen (protected
glass is optional).
Almost all kinds of stylus materials can be used in Infrared Touch Screen.
Infrared is the earliest and most reliable touch screen technology, due to the
improvement of LED materials. The lifetime of Infrared Touch Screen is much
longer and more stable in operation.
Disadvantages:
•
•
•
•
•
Low resolution
Exhibits worst parallax problem of all technologies for CRT use since light
beams do not follow curvature of CRT faceplate
May cause unintended activation of target prior to finger contact with CRT
caused by IR light beam location above surface of CRT
Pressure hose down may cause unwanted target selection
Dust, oil or grease buildup on frame that impedes light beam may cause
malfunction
TOUCHSCREEN TECHNOLOGY
23. DISPERSIVE SIGNAL TECHNOLOGY
Dispersive
Signal
Technology, specifically developed for
interactive digital signage
applications, sets new large-format
touch standards for fast, accurate
repeatable
touch
response.
In
addition,
Dispersive
Signal
Technology’s operation is unaffected
by contaminants, static objects or
other touches on the touch screen.
Other key
characteristics
of
this
patented
technology
are
exceptional
optics, ease of integration, and input
flexibility.
TOUCHSCREEN TECHNOLOGY
24. WORKING
TOUCHSCREEN TECHNOLOGY
• Dispersive
Signal
Technology
determines a “touch point” by
measuring the mechanical energy
(bending waves) within a substrate
created by a finger or stylus touching
the surface of the glass.
• When the touch implement impacts the
screen, bending waves are induced that
radiate away from the touch location.
• As the wave travels outwards, the
signal spreads out over time due to the
phenomena of dispersion. Piezoelectric
sensors positioned in the corners on the
backside of the glass convert this
smeared mechanical impulse into an
electrical signal.
• The distance from each sensor
determines the extent to which the
signal is dispersed. The further away
the “touch point” is from the sensor, the
more the signal is smeared.
25. Advantages and Disadvantages:
• Because the bending wave travels within the glass
substrate, objects or hands resting on the screen or onscreen contaminants do not affect the bending wave and
therefore, do not affect the performance of the
touchscreen.
• 3M
DST
can
be
activated
by
bare
finger, fingernail, stylus, and pen or basically anything
that create the bending wave in the glass Substrate.
• A downside is that after the initial touch, the system
cannot detect a motionless finger.
TOUCHSCREEN TECHNOLOGY
26. MULTI-TOUCH
In computing, multi-touch refers
to a touch sensing surface's
(track pad or touchscreen) ability
to recognize the presence of two
or more points of contact with the
surface.
This
plural-point
awareness is often used to
implement advanced functionality
such as pinch to zoom or
activating predefined programs.
TOUCHSCREEN TECHNOLOGY
27. Multi-touch
has
been
implemented in several
different ways, depending
on the size and type of
interface. The most popular
form
are
mobile
devices,
tablets,
touchtables and walls. Both
touch-tables and touch walls
project an image through
acrylic or glass, and then
back-light the image with
LEDs.
TOUCHSCREEN TECHNOLOGY
28. TYPES:
• Capacitive Technologies:
• Surface Capacitive Technology or Near Field Imaging
(NFI)
• Projected Capacitive Touch (PCT)
• Mutual capacitance
• Self-capacitance
• In-cell: Capacitive
• Resistive Technologies:
• Analog Resistive
• Digital Resistive or In-Cell: Resistive
• Wave Technologies:
• Surface Acoustic Wave (SAW)
• Bending Wave Touch (BWT)
• Dispersive Signal Touch (DST)
• Acoustic Pulse Recognition (APR)
TOUCHSCREEN TECHNOLOGY
30. The upcoming in-cell and on-cell technologies
WHAT ARE THESE TECHNOLOGIES?
• Manufacturers of touch screen devices usually use three layer.
• This is because LCD manufacturers produce the LCD panel, touch
sensor manufacturers produce the touch screen layer and glass
manufacturers (such as Corning) produce the protective outer glass.
• But instead we can actually move the touch technology onto the outer
glass layer. This is called on-cell or G2.
• We can also choose to put the touch sensors into the actual display
panel. This is called in-cell. Both layers are perfectly suited for the touch
electrodes.
TOUCHSCREEN TECHNOLOGY
31. WHY WE NEED THEM?
• With both in-cell and out-cell technologies, the thickness of
smartphones, tablets etc. considerably reduces.
• With both on-cell and in-cell we can expect better color saturation
as light has to pass through fewer layers.
• Depending on the implementation it can even make touch
feedback more accurate.
• And lastly, on-cell and in-cell makes it feel like we are actually
touching our phone’s display instead of an outer glass layer.
TOUCHSCREEN TECHNOLOGY