Using Appropriate Hardware (Projectors, Interactive Whiteboard/ Smart boards)
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This document discusses different types of hardware that can be used for educational presentations, including their pros and cons. It describes projectors such as overhead projectors, opaque projectors, DLP projectors, and LCD projectors. It also discusses interactive whiteboards/smart boards. Projectors allow images and documents to be enlarged on a screen for a group to see, while interactive whiteboards allow touch interaction. Benefits include better use of class time, multimedia integration, and encouraging student engagement, while drawbacks include cost, maintenance issues, and potential technical problems.
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This document discusses and compares DLP and LCD projector technologies. It explains that DLP projectors use Digital Micro mirror Devices (DMD) chips that contain thousands of tiny mirrors to reflect light and produce each pixel of the image. DLP projectors can have single or multiple DMD chips to create colors. Overall, DLP projectors tend to be brighter than LCD projectors but also more expensive, making them a popular choice for businesses and education.
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Projectors work by using different technologies to project images or video onto a screen. The main types are CRT, LCD, DLP, and LCOS. CRT projectors use electron guns and phosphors to create images. LCD projectors use backlights and liquid crystal panels to control light transmission for each pixel. DLP projectors use an array of microscopic mirrors to rapidly reflect light and form images. LCOS projectors are similar to LCD but use reflective silicon backplanes instead of glass for better image quality. All projector types work by precisely controlling light to reproduce colors and create projected pictures.
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This document discusses different types of projectors. It begins with an introduction to projectors and their history. It then describes the main types of projectors - CRT, DLP, and LCD projectors. It explains how each type works and their advantages and disadvantages. The document provides figures to illustrate the working of DLP and LCD projectors. It also discusses other aspects like resolution, brightness and contrast ratio that should be considered while choosing a projector. In conclusion, it compares the different projector technologies.
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Projectors work by using different technologies to project images or video onto a screen. The main types are CRT, LCD, DLP, and LCOS. CRT projectors use electron guns and phosphors to create images. LCD projectors use backlights and liquid crystal panels to control light transmission for each pixel. DLP projectors use an array of microscopic mirrors to rapidly reflect light and form images. LCOS projectors are similar to LCD but use reflective silicon backplanes instead of glass for better image quality. All projector types work by precisely controlling light to reproduce colors and create projected pictures.
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LCD projectors contain three LCD glass panels that modulate red, green, and blue light from a lamp to produce colored images. The light passes through dichroic mirrors and LCD panels, which can open or close pixels to allow light through. This modulated light is then recombined and projected through a lens onto a screen. Key components include a lamp, LCD panels, lens, control panel and cooling fan. LCD projectors allow many people to view presentations, produce sharp images efficiently, and generate large images at low cost. However, they may require dark rooms and maintenance.
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DLP (Digital Light Processing) technology was developed by Texas Instruments in 1987. It uses a digital micromirror device (DMD) chip containing a grid of hundreds of thousands of tiny tilting mirrors to produce high-quality images with high brightness and contrast. Each mirror represents one pixel and rapidly tilts between on and off positions to reflect light and produce colors using a spinning color wheel. DLP has advantages over other display technologies as it can create images of any size, has excellent brightness uniformity, and does not use heat-sensitive organic materials. It is widely used in projectors, TVs, and other applications demanding superior visuals.
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There are several types of projectors that can be used for presentations or entertainment. A front projection projector is good for large audiences but makes interaction difficult. A rear projection TV projects an image through lenses and mirrors to create a large screen image in a shallow depth. CRT projectors use small color CRT tubes to focus and enlarge the image onto the screen, while LCD projectors send light through a prism to separate colors and display the image. DLP projectors use a digital micro-mirror device to project images. The brightness level in lumens is an important factor, as is the throw distance between the projector and screen. Projector lamps are a key component that transfers the image to the larger screen.
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link: https://www.youtube.com/watch?v=9nb8mM3uEIc
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DLP, or Digital Light Processing, was invented in 1987 by Dr. Larry Hornbeck. It uses a Digital Micromirror Device (DMD) chip that contains a matrix of microscopic mirrors to create images by directing light. There are two main types of DLP systems - one chip uses a color wheel while three chip systems use a prism to separate colors. DLP has advantages over LCD like lower power consumption and maintenance. It finds applications in video projectors, 3D printing, and holographic storage due to its speed and ability to withstand mechanical stresses.
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This document discusses projection systems and their interfacing. It describes the key components and specifications of three main projection technologies: CRT, LCD, and DLP. CRT projectors use a cathode ray tube to generate images while LCD uses liquid crystal displays and DLP (digital light processing) uses a digital micromirror device chip. The document outlines specifications for each like brightness, resolution, throw ratio and inputs/outputs including VGA and HDMI interfaces.
Understanding multimedia projectors.
1. A multimedia projector is a compact, high resolution device capable of projecting text, images, video, and audio content from various input sources like computers, DVD/VCR players, and storage devices.
2. A multimedia projector takes a video signal, converts it into a viewable image, and projects it on a screen. It can be used to present PowerPoint slides, videos, games, and more.
3. Multimedia projectors have various applications like presenting in seminars and expos, conducting business meetings, training workshops, and teaching classes efficiently. They are categorized based on size and portability as ultra light, conference room, and fixed installation projectors.
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The document discusses different types of projectors, including their advantages and disadvantages. Front projection allows for a larger image size but requires careful room lighting design. Rear projection allows for easier interaction and is better for rooms with normal lighting, but has limited screen size and requires space behind the screen. CRT projectors have long service life but are large, heavy, and use more power. LCD projectors display color images using polarized light through LCD panels but require more setup. LED projectors are becoming more popular due to less maintenance and longer life compared to conventional lamps.
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Digital light processing_seminar_report_download
Digital Light Processing (DLP) is a display technology that uses a Digital Micromirror Device (DMD) chip. The DMD chip contains an array of tiny tilting mirrors that rapidly direct light to create images. DLP creates images using a single white light source and delivers deeper blacks, conveys fast motion well, and has a replaceable light bulb. It is well suited for sports and movies. At the heart of a DLP projector is the DMD chip, which contains hundreds of thousands of tilting micromirrors. Each mirror is mounted on springs and can tilt either on or off to reflect light either toward or away from the projection lens and screen. Other key components include color filters, cooling
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Audiovisual aids are tools that use sight and sound to enhance the learning process. They include anything from projected materials like slides, films, and overhead transparencies to non-projected materials like charts, diagrams, and models. AV aids make learning more engaging, memorable, and realistic. They allow complex concepts to be presented in a clear, visual manner and enable teachers to easily reach large student audiences. Proper use of high-quality AV aids tailored to students' levels can improve motivation, attention, understanding, and retention of lessons.
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This document discusses when new types of displays will become economically feasible and begin to diffuse. It notes that liquid crystal displays (LCDs) are becoming more affordable due to increases in the size of LCD substrates, which allows production costs to decrease. Specifically, the size of LCD substrates has been growing by a factor of 1.8 every 3 years. Organic light-emitting diode (OLED) displays are also discussed as a promising technology, though they currently have higher costs than LCDs. Factors like falling production costs as substrate sizes increase and the use of printing technologies could help OLED displays become more affordable over time.
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An interactive whiteboard or LCD allows users to access and manipulate electronic files by connecting a projector and board to a computer. It serves as an extension of the computer by mirroring the computer display. Users can interact directly on the board's surface like writing with digital ink. Key factors in choosing an interactive whiteboard include audience size, with larger boards for bigger groups, and matching the board's resolution like widescreen to the computer's format.
DEVELOPMENT OF TEACHING LEARNING MATERIALS
Edgar dale’s cone of experience - projected aids: OHP, slides, LCD projector, Audio Conference, Video Conference, Epidiascope and Slide Projector - Non Projected Aids: Charts, Flash Cards, Printed Materials, Bulletin Board, Magnetic Board and Flannel Board. Need and important of Audio Visual aids – Types of Audio Visual Aids – Graphic Aids, Activity Aids.
Overhead projector getes
An overhead projector projects enlarged images of transparencies onto a screen. It consists of a lamp, lens, and mirror that reflects the image on the transparency up towards the screen. The presenter can see the transparency and the audience sees the enlarged projected image. Overhead projectors were commonly used in classrooms but have declined in use due to the rise of digital projection technologies like PowerPoint that allow for more interactive presentations.
Projected visuals
Projected visuals like slides and digital images can be used for instruction and entertainment. They allow teachers to illustrate concepts for all subjects and grade levels. Digital storage devices like CD-ROMs and DVDs allow large numbers of high quality images to be stored and projected randomly. Document cameras and overhead projectors are commonly used classroom tools that allow visuals like documents, objects, and transparencies to be projected for groups. Recent technologies like digital cameras and computer presentation software provide new ways to easily create and display visuals.
out put devices.pptx
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Krishna
Digital Light Processing (DLP) is a display technology that uses a Digital Micromirror Device (DMD) chip to create high-quality digital images for projection or display. DLP was invented by Texas Instruments in 1987 and uses an array of tiny tilting mirrors on a chip to reflect light and produce an image. Each mirror represents one pixel. DLP provides superior brightness, resolution, and color fidelity compared to other display technologies. Some common applications of DLP include home theater projectors, televisions, and cinema projectors.
ITC_lec_5_5.ppt
This document provides an overview of different types of computer output devices. It discusses monitors like cathode ray tubes, liquid crystal displays, light emitting diodes, plasma screens, and projectors. It also covers printers such as impact dot matrix printers and non-impact laser printers. Additionally, it mentions plotters for producing high-precision graphics and speakers for audio output. The document aims to educate about the basic functions and characteristics of these common output devices.
Itc lec 5 Output Devices
Output devices
Types of output device
1.Monitors
2.Printers
3.Plotters
4.Speakers
5.CRT
6.Projectors
Presentation
BEST OF LUCK...
ruffap
Overhead projectors, slide projectors, film strips, document cameras, and digital projectors are output devices that project images onto screens. They allow teachers to have eye contact with students while presenting visual information. Overhead projectors shine light through sheets with images or text, while slide projectors sequentially project larger photographic slides. Film strips contain individual picture frames arranged in sequence. Document cameras can magnify and project real three-dimensional objects and transparencies. These devices help teachers effectively present visual lessons and gauge student comprehension.
Queenie power
Digital Image Projection
(The roles and function of the Educational technology in the 21st century education)
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Computer graphics are used for movie making, video games, scientific modeling, and design. They can be displayed on devices like LCD and LED screens. LCD screens use liquid crystals to rotate polarized light and display images without emitting light themselves. They are used in televisions, monitors, and other devices. LED screens are a type of LCD screen that uses light-emitting diodes for backlighting, making them more energy efficient and enabling thinner designs than older LCD screens that used cold cathode fluorescent lamps. New flat panel displays continue advancing with technologies like organic LED lighting and curved or bendable screens.
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Using Appropriate Hardware (Projectors, Interactive Whiteboard/ Smart boards)
- 1. Using Appropriate Hardware (Projectors, Interactive Whiteboard/ Smart boards) By Greeshma Raj 1st year M.Ed Mar Theoplius Training College
- 2. Projectors A projector is a device that uses light and lenses to take an image and project a magnified image onto a larger screen or wall.
- 3. Types of projectors 01 02 Opaque Projector 03 DLP 04 LCD OHP
- 4. An OHP, like a film or slide projector, uses light to project an enlarged image on a screen, allowing the view of a small document or picture to be shared with a large audience. In the overhead projector, the source of the image is a page-sized sheet of transparent plastic film (also known as "foils" or "transparencies") with the image to be projected either printed or hand-written or Drawn. These are placed on the glass platen of the projector, which has a light source below it and a projecting mirror and lens assembly above it (hence, "overhead"). They were widely used in education and business before the advent of video projectors. OHP (Overhead Projectors)
- 5. Opaque Projector Opaque projectors are typically used to project images of book pages, drawings, mineral specimens, leaves, etc. They have been produced and marketed as artists’ enlargement tools to allow images to be transferred to surfaces such as prepared canvas, or for lectures and discourses. Care must be taken that the materials are not damaged by the heat generated by the light source. Opaque projectors are not as common as the overhead projector.
- 6. DLP • (digital light processing) uses thousands of microscopically small mirrors, which not only move pixels closer together for higher contrast and greater clarity, but also provide greater brightness than LCD projectors. DLP’s high resolution makes it ideal for projecting images or videos in HD (high definition). DLP (Digital Light Processing)
- 7. An LCD projector is a type of video projector for displaying video, images or computer data on a screen or other flat surface. Overhead and opaque projectors primarily use 19th century technology (electricity and light bulbs), LCD projectors use liquid crystal panels plus the latest computer and optical technology to project both still and moving images in vivid color. Many project ors also have built-in audio speakers, making them all-in- one audiovisual presentation units. LCD (Liquid Crystal Display)
- 8. Pros & Cons of projectors 01 03 02 01 Better Use of Class Time Multimedia integration Easier Note Taking Cost 02 Maintenance 03 Technical Problems 04 04 Interactive learning experience Bulky, Heavy Equipment
- 10. Interactive Whiteboard/ Smart Board An interactive whiteboard (IWB) also known as Interactive board or smart board, is a large interactive display in the form factor of a whiteboard. It can either be a standalone touch screen computer used independently to perform tasks and operations, or a connectable apparatus used as a touchpad to control computers from a projector
- 11. Pros & Cons of Interactive Whiteboard/ Smart board 01 03 02 01 Accommodate Multiple Learning Styles Digitize the Lessons Improve Student Career Preparation Price 02 Teacher Training 03 Technical Inability 04 04 Encourage Student Engagement overuse