An LCD is a flat panel display that uses liquid crystals to modulate light from a backlight to produce images. It has an array of pixels filled with liquid crystals that can be electronically controlled to produce color or monochrome images. LCDs are commonly used in devices like computer monitors, TVs, clocks and phones. They work by controlling the transmission of light through the liquid crystals with an electric field to display images but do not directly emit light.
This slide focuses on display applications of liquid crystal devices. It contains a short video to explain the process very well. Hope it will be helpful.
This slide focuses on display applications of liquid crystal devices. It contains a short video to explain the process very well. Hope it will be helpful.
Basics of Colour Television and Digital TVjanakiravi
Main characteristics of human eye with regard to perception of colours-mixing of colours. three standards of colour transmission system, CATV, DTH, HDTV & SMART TV
For TS-SBTET, C-18, DECE 6 Unit, By Nenavath Ravi Kumar, MIST Hyderabad
This Presentation most beneficial for Engineering student and mostly for electronics.In this PPT discuss about the led and also how does it work , use and also discuss about construction of LED,color material,cost , application and many more
Basics of Colour Television and Digital TVjanakiravi
Main characteristics of human eye with regard to perception of colours-mixing of colours. three standards of colour transmission system, CATV, DTH, HDTV & SMART TV
For TS-SBTET, C-18, DECE 6 Unit, By Nenavath Ravi Kumar, MIST Hyderabad
This Presentation most beneficial for Engineering student and mostly for electronics.In this PPT discuss about the led and also how does it work , use and also discuss about construction of LED,color material,cost , application and many more
IPS(In-plane switching) is a screen technology for liquid crystal displays (LCDs). These limitations included strong viewing angle dependence and low-quality colour reproduction.In-plane switching involves arranging and switching the orientation of the molecules of the liquid crystal (LC) layer between the glass substrates. This is done, essential
Operation “Blue Star” is the only event in the history of Independent India where the state went into war with its own people. Even after about 40 years it is not clear if it was culmination of states anger over people of the region, a political game of power or start of dictatorial chapter in the democratic setup.
The people of Punjab felt alienated from main stream due to denial of their just demands during a long democratic struggle since independence. As it happen all over the word, it led to militant struggle with great loss of lives of military, police and civilian personnel. Killing of Indira Gandhi and massacre of innocent Sikhs in Delhi and other India cities was also associated with this movement.
Instructions for Submissions thorugh G- Classroom.pptxJheel Barad
This presentation provides a briefing on how to upload submissions and documents in Google Classroom. It was prepared as part of an orientation for new Sainik School in-service teacher trainees. As a training officer, my goal is to ensure that you are comfortable and proficient with this essential tool for managing assignments and fostering student engagement.
2024.06.01 Introducing a competency framework for languag learning materials ...Sandy Millin
http://sandymillin.wordpress.com/iateflwebinar2024
Published classroom materials form the basis of syllabuses, drive teacher professional development, and have a potentially huge influence on learners, teachers and education systems. All teachers also create their own materials, whether a few sentences on a blackboard, a highly-structured fully-realised online course, or anything in between. Despite this, the knowledge and skills needed to create effective language learning materials are rarely part of teacher training, and are mostly learnt by trial and error.
Knowledge and skills frameworks, generally called competency frameworks, for ELT teachers, trainers and managers have existed for a few years now. However, until I created one for my MA dissertation, there wasn’t one drawing together what we need to know and do to be able to effectively produce language learning materials.
This webinar will introduce you to my framework, highlighting the key competencies I identified from my research. It will also show how anybody involved in language teaching (any language, not just English!), teacher training, managing schools or developing language learning materials can benefit from using the framework.
Model Attribute Check Company Auto PropertyCeline George
In Odoo, the multi-company feature allows you to manage multiple companies within a single Odoo database instance. Each company can have its own configurations while still sharing common resources such as products, customers, and suppliers.
Honest Reviews of Tim Han LMA Course Program.pptxtimhan337
Personal development courses are widely available today, with each one promising life-changing outcomes. Tim Han’s Life Mastery Achievers (LMA) Course has drawn a lot of interest. In addition to offering my frank assessment of Success Insider’s LMA Course, this piece examines the course’s effects via a variety of Tim Han LMA course reviews and Success Insider comments.
The Roman Empire A Historical Colossus.pdfkaushalkr1407
The Roman Empire, a vast and enduring power, stands as one of history's most remarkable civilizations, leaving an indelible imprint on the world. It emerged from the Roman Republic, transitioning into an imperial powerhouse under the leadership of Augustus Caesar in 27 BCE. This transformation marked the beginning of an era defined by unprecedented territorial expansion, architectural marvels, and profound cultural influence.
The empire's roots lie in the city of Rome, founded, according to legend, by Romulus in 753 BCE. Over centuries, Rome evolved from a small settlement to a formidable republic, characterized by a complex political system with elected officials and checks on power. However, internal strife, class conflicts, and military ambitions paved the way for the end of the Republic. Julius Caesar’s dictatorship and subsequent assassination in 44 BCE created a power vacuum, leading to a civil war. Octavian, later Augustus, emerged victorious, heralding the Roman Empire’s birth.
Under Augustus, the empire experienced the Pax Romana, a 200-year period of relative peace and stability. Augustus reformed the military, established efficient administrative systems, and initiated grand construction projects. The empire's borders expanded, encompassing territories from Britain to Egypt and from Spain to the Euphrates. Roman legions, renowned for their discipline and engineering prowess, secured and maintained these vast territories, building roads, fortifications, and cities that facilitated control and integration.
The Roman Empire’s society was hierarchical, with a rigid class system. At the top were the patricians, wealthy elites who held significant political power. Below them were the plebeians, free citizens with limited political influence, and the vast numbers of slaves who formed the backbone of the economy. The family unit was central, governed by the paterfamilias, the male head who held absolute authority.
Culturally, the Romans were eclectic, absorbing and adapting elements from the civilizations they encountered, particularly the Greeks. Roman art, literature, and philosophy reflected this synthesis, creating a rich cultural tapestry. Latin, the Roman language, became the lingua franca of the Western world, influencing numerous modern languages.
Roman architecture and engineering achievements were monumental. They perfected the arch, vault, and dome, constructing enduring structures like the Colosseum, Pantheon, and aqueducts. These engineering marvels not only showcased Roman ingenuity but also served practical purposes, from public entertainment to water supply.
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An EFL lesson about the current events in Palestine. It is intended to be for intermediate students who wish to increase their listening skills through a short lesson in power point.
Welcome to TechSoup New Member Orientation and Q&A (May 2024).pdfTechSoup
In this webinar you will learn how your organization can access TechSoup's wide variety of product discount and donation programs. From hardware to software, we'll give you a tour of the tools available to help your nonprofit with productivity, collaboration, financial management, donor tracking, security, and more.
Macroeconomics- Movie Location
This will be used as part of your Personal Professional Portfolio once graded.
Objective:
Prepare a presentation or a paper using research, basic comparative analysis, data organization and application of economic information. You will make an informed assessment of an economic climate outside of the United States to accomplish an entertainment industry objective.
Read| The latest issue of The Challenger is here! We are thrilled to announce that our school paper has qualified for the NATIONAL SCHOOLS PRESS CONFERENCE (NSPC) 2024. Thank you for your unwavering support and trust. Dive into the stories that made us stand out!
Embracing GenAI - A Strategic ImperativePeter Windle
Artificial Intelligence (AI) technologies such as Generative AI, Image Generators and Large Language Models have had a dramatic impact on teaching, learning and assessment over the past 18 months. The most immediate threat AI posed was to Academic Integrity with Higher Education Institutes (HEIs) focusing their efforts on combating the use of GenAI in assessment. Guidelines were developed for staff and students, policies put in place too. Innovative educators have forged paths in the use of Generative AI for teaching, learning and assessments leading to pockets of transformation springing up across HEIs, often with little or no top-down guidance, support or direction.
This Gasta posits a strategic approach to integrating AI into HEIs to prepare staff, students and the curriculum for an evolving world and workplace. We will highlight the advantages of working with these technologies beyond the realm of teaching, learning and assessment by considering prompt engineering skills, industry impact, curriculum changes, and the need for staff upskilling. In contrast, not engaging strategically with Generative AI poses risks, including falling behind peers, missed opportunities and failing to ensure our graduates remain employable. The rapid evolution of AI technologies necessitates a proactive and strategic approach if we are to remain relevant.
Francesca Gottschalk - How can education support child empowerment.pptxEduSkills OECD
Francesca Gottschalk from the OECD’s Centre for Educational Research and Innovation presents at the Ask an Expert Webinar: How can education support child empowerment?
2. What Is LCD???
• A liquid crystal display (LCD) is a thin, flat panel used for
electronically displaying information such as text, images, and
moving pictures.
• It is an electronically-modulated optical device made up of
any number of pixels filled with liquid crystals and arrayed in
front of a light source(backlight) or reflector to produce
images in color or monochrome.
• Its uses include computer monitors ,televisions , instrument
panels, and devices ranging from aircraft cockpit displays, to
every-day consumer devices such as clocks , calculators, and
telephones.
3. 3
LCD Overview
• LCDs are a type of light modulating display device. LCD technology does
not directly emit light in order to create visualizations, it rather modifies
the transmission of light to represent images.
– On the other hand Plasma displays, CRT and OLED devices are all
light emitting display devices.
• LCDs are rapidly becoming the most popular display device available.
– 2006 - Nearly 33% of all TVs sold in North America were LCDs
– 2007 - Expected to surpass 50%
4. 4
History and Development of LCDs
• Discovery of liquid crystals
– 1888
• Friedrich Reinitzer discovers liquid crystals
– 1904
• Otto Lehmann publishes work on liquid crystals
• Innovation
– 1963
• Richard Williams and George Heilmeier suggest using
liquid crystals for making a display device
– 1968
• First operational LCD created by RCA using Dynamic Scattering Method
(DSM)
– 1971
• First LCD using Twisted Nematics (TN) produced
5. 5
History and Development of LCDs (cntd)
• Applications
– 1970’s
• First commercial LCDs came into existence. The technology was first
used in the quartz watch and in early calculator displays.
– 1990’s
• Early use of colour LCDs for digital cameras and computer monitors
– 2000’s
• Technological improvements led to larger LCDs suitable for home theatre
use.
• Full HD 1080p displays produced
• Currently the largest LCD panel is 108”
6. Liquid Crystal Displays
Liquid crystal display (LCD) is a flat electronic display panel used as a
visual display aid. It uses liquid crystals to create visual effects on
screen. Liquid crystal is a state of matter between solids and liquids.
LCDs do not generate light on their own but rely on sunlight or room
light to generate images with help of liquid crystal.
8. 8
Types of LCDs
• Passive vs Active Matrix
– Passive
• Each pixel must retain it’s state without a steady electric charge
• Scanned one pixel at a time
• Poor contrast, and very slow response times
– Active
• Electric charged is stored between refreshes
• Scanned one row at a time
9. PASSIVE MATRIX LCD DISPLAY
• Uses a grid of vertical and horizontal conductors
comprised of Indium Tin Oxide (ITO) to create an
image
• There is no switching device.
• Pixels are addressed one at a time by row and
column matrix
• Only used in low-resolution displays (such as watch,
calculator)
• Slow response time, poor contrast
9
11. PASSIVE MATRIX LCD DISPLAY
• It is based on Thin Film Transistor (TFT) Technology
• Switching element at each pixel. Individual pixels
isolated from each other. Thin Film Transistors most
commonly used.
• Each row line is activated sequentially
• Used in computer displays
• A switching device and a storage capacitor are
integrated at the each cross point of the electrodes
11
13. PROBLEMS FACED IN PASSIVE DISPLAY
• Crosstalk occurs when neighboring pixel voltages
affect each other, reducing the gray scale,
contrast, and viewing angle.
• Submarining occurs when slow-to-respond LC
materials cannot respond quickly enough and the
picture can disappear temporarily.
• One Solution: placing a switch at each pixel, such
as a transistor or diode --> pixel matrix becomes
“active.”
13
14. PROBLEMS SOLVED BY ACTIVE DISPLAY
• Pixel isolation eliminates crosstalk
• Isolation from the column line permits the pixel
capacitor to remain charged, so that faster
responding liquid crystals can be used.
• Due to switching action of transistors,only the desired
pixel recieve a charge ,improving image quality over
a passive matrix.
14
15. ADVANTAGES OF LCD
Brightness
Produces very bright images due to high peak intensity. Very
suitable for environments that are brightly lit .
Emissions
Produce considerably lower electric, magnetic and
electromagnetic fields than CRTs.
Geometric
Distortion
No geometric distortion at the native resolution. Minor
distortion can occur for other resolutions.
Power
Consumption
Energy efficient. Consume less than 1/3 the power of a
comparable CRT. Consume less electricity than a CRT and
produce little heat.
Physical Aspects
Take up about 40% less desk space. LCDs are thin and
compact.
Screen Shape Completely flat screen.
Sharpness
At the native resolution, the image is perfectly sharp.
Adjustments are required at all other resolutions which can
result in measurable degradation to the image.
16. DISADVANTAGES OF LCD
Aspect Ratio The aspect ratio and resolution are fixed.
Black-Level
Not proficient at producing black and very dark grays. In a
"standard" configuration, not appropriate for use in dimly lit and
dark conditions.
Contrast Lower contrast than CRTs due to a poor black-level.
Cost
Considerably more expensive purchase price than comparable
CRTs . (Cheaper lifetime cost: lasts about 13,000 - 15,000 more
hours than a typical CRT.)
Motion Artifacts
Slow response times and scan rate conversion result in severe
motion artifacts and image degradation for moving or rapidly
changing images.
Resolution
Works best at the native resolution. The native resolution can not
be changed. All other resolutions require adjusting procedures
which can cause considerable deterioration of the image.
Viewing Angle
Restricted viewing angles. Viewing angles affect the brightness,
contrast and colors shown. Wide angles can lead to contrast and
color reversal.