Ppt on flat panel display

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The document discusses different types of video display devices including cathode ray tube (CRT) displays and flat panel displays. CRT displays use an electron gun to create images on a phosphorus screen but have disadvantages like large size, weight, and high power consumption. Flat panel displays like liquid crystal displays (LCDs) and plasma display panels are thinner, lighter, and use less power than CRTs. LCDs have advantages such as portability, reduced eyestrain, and thin panels but have limitations like dependence on viewing angle and slower response times. Plasma displays can be large, have good color rendering, and brightness but also have high costs and power consumption.

Group members Alisha Korpal Nivia Jain Sharuti Jain

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Flat panel displays are thin, lightweight electronic visual displays that use technologies like LCD, LED, OLED, and plasma. They have largely replaced bulkier CRT displays. There are two main types: volatile displays that require constant refreshing like LCDs, and static displays that maintain image without refreshing like some e-readers. Flat panels are used in devices like laptops, phones, TVs due to their thinness and portability compared to CRTs.

Plasma display

PRADEEP Cheekatla

Plasma displays use small cells filled with electrically charged gas that illuminate pixels when an electric current is applied. They can produce large, bright displays over 30 inches and have wide viewing angles and deep blacks. However, they use more power than LCDs and may cause noise or radio interference. While thicker than LCDs, some modern plasma TVs are as slim as 2.5 cm. Competing display technologies include LCD, OLED, and LED screens.

Chapter 10: Display Systems

askme

The document provides an overview of computer display systems, including monitors and graphics cards. It discusses cathode ray tube (CRT) monitors and how they work using electron guns and phosphor coatings. It also covers features of monitors like resolution, dot pitch, refresh rate, and screen size. Flat panel displays (FPDs) like liquid crystal displays (LCDs) are also introduced, along with different types of LCD technologies. The roles of the graphics card and monitor in the overall display system are explained.

Graphics display devices

alldesign

This document provides information about different types of display devices used in computer graphics. It discusses cathode ray tubes (CRTs) which produce images using an electron beam striking a phosphorescent screen. CRTs are bulky and electromagnetic fields may pose health risks. Raster scan displays redraw images by sweeping an electron beam across the screen in lines. Color CRTs use phosphors and shadow masks to produce colors. Flat panel displays like liquid crystal displays are thinner alternatives to CRTs.

Flat panel displays and plasma panel displays

hemanth kumar

Flat panel displays such as plasma panels, LCDs, and LEDs are thinner, lighter, and use less power than traditional CRT monitors and TVs. They are commonly used in devices like laptops, calculators, video games, and advertisements. Plasma panel displays specifically work by filling the space between two glass plates with neon gas and using electrodes to make the gas cells glow independently of each other, producing the pixels in the display without the need for refreshing. While brighter than LCDs, plasma displays also have some disadvantages like relatively poor resolution and higher cost compared to CRTs.

Raster Scan display

Lokesh Singrol

Raster scanning is a process used in television and computer graphics where an image is captured and reconstructed by systematically scanning across it in horizontal lines from top to bottom. Each line, called a scan line, is transmitted as an analog signal or divided into discrete pixels. Pixels are stored in a refresh buffer and then "painted" onto the screen one row at a time, with the beam returning to the left side during horizontal retrace and to the top left for vertical retrace between frames. Raster scanning provides realistic images but at the cost of lower resolution compared to random scanning systems.

Introduction to computer graphics

Priyodarshini Dhar

This document provides an introduction to computer graphics. It defines computer graphics as the creation, storage, and manipulation of pictures and drawings using digital computers. Computer graphics is used across diverse fields such as engineering, medicine, education, entertainment, and more. The document discusses basic terms related to display devices such as pixels, resolution, color depth, and frame buffers. It also describes different types of display devices including raster scan displays, random scan displays, direct view storage tubes, flat panel displays, and stereoscopic displays. Applications of computer graphics such as design, image processing, animation, simulation, and medical imaging are also summarized.

The document discusses liquid crystal displays (LCDs). LCDs are thin, flat display devices made up of pixels arrayed in front of a light source. Each pixel consists of liquid crystal molecules aligned between two transparent electrodes. Polarizing filters allow light to pass through in varying amounts, creating different levels of gray. Modern LCDs like computer monitors use an active matrix structure with thin-film transistors to access each pixel individually. LCDs are used in devices like computer monitors, laptops, televisions, and more.

Random scan displays and raster scan displays

Somya Bagai

Raster scan displays work by sweeping an electron beam across the screen in horizontal lines from top to bottom. As the beam moves, its intensity is turned on and off to illuminate pixels and form an image. The pixel values are stored in and retrieved from a refresh buffer or frame buffer. Random scan displays draw images using geometric primitives like points and lines based on mathematical equations, directing the electron beam only where needed. Raster scans have higher resolution but jagged lines, while random scans produce smooth lines but cannot display complex images. Both use a video controller and frame buffer in memory to control the display process.

Homomorphic filtering

Gautam Saxena

Homomorphic filtering is a technique used to remove multiplicative noise from images by transforming the image into the logarithmic domain, where the multiplicative components become additive. This allows the use of linear filters to separate the illumination and reflectance components, with a high-pass filter used to remove low-frequency illumination variations while preserving high-frequency reflectance edges. The filtered image is then transformed back to restore the original domain. Homomorphic filtering is commonly used to correct non-uniform illumination and simultaneously enhance contrast in grayscale images.

raster and random scan

Sonia Pahuja

Raster scan displays have lower resolution than random scan displays because raster scan stores picture definition as intensity values along scan lines, while random scan stores pictures as line commands. Raster scan directs its electron beam from top to bottom across the entire screen one row at a time, making it less expensive than random scan which only draws required lines. However, random scan produces smoother lines and can provide more realistic displays through advanced techniques like shadows and hidden surfaces.

Lqiuid Crystal: Display applications

Monika Gupta

Color models

Haitham Ahmed

This document discusses various color models used in computer graphics including RGB, HSV, HSL, CMY, and CMYK. It explains the key components of each model such as hue, saturation, value, and how colors are represented. Common applications of different color models are also summarized such as RGB for computer displays and CMYK for printing. In addition, the concepts of dithering and half-toning techniques used to reproduce colors on devices are introduced.

Flat panel displays

Mohd Arif

Direct-view storage tubes store picture information directly behind the screen using an electron beam to write a charged pattern on a fine mesh grid coated with dielectric. A flood electron gun then emits a continuous flood of electrons that pass through the grid, attaching to positively charged portions and striking the phosphors. This stored charge pattern is what displays the image without needing refreshment like a standard CRT. Advantages are very high resolution images without flicker, while disadvantages are inability to display color and inability to fully erase selected areas.

Computer graphics - colour crt and flat-panel displays

Vishnupriya T H

liquid crystal display

Dinesh Pasi

An LCD is a thin, flat panel that uses polarization of light to electronically display text, images, and video. It uses liquid crystals that shift polarization of light when voltage is applied. LCDs have transistors at each pixel to prevent crosstalk and allow higher resolutions, viewing angles, and response times than passive matrix displays. Color LCDs use red, green, and blue subpixels to display a wide range of colors.

Video display devices

shalinikarunakaran1

The document discusses different types of video display devices, focusing on cathode ray tubes (CRTs). It describes how CRTs work using an electron gun, deflection plates, and phosphor-coated screen to produce images. Color CRT monitors are also covered, explaining how they produce color using either beam penetration or shadow mask methods. Other display types mentioned include direct view storage tubes, flat panel displays, and their key differences from CRTs.

Windows to viewport transformation

Prashant Singh

The document discusses the window-to-viewport transformation process which maps a 2D scene to device coordinates. It involves developing formulas to proportionally map points from the world window to the viewport. The scale and translation factors that relate the world window and viewport coordinates are defined. Changing the viewport position, using multiple viewports, or adjusting the viewport dimensions allows manipulating the displayed scene. Distortion may occur if the aspect ratios of the world window and viewport differ.

Output primitives in Computer Graphics

Kamal Acharya

Computer Graphics

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Raster Scan Display

Ankur Soni

In a raster scan display, the screen is divided into a grid of pixels that are scanned line by line from top to bottom. Each pixel is either on or off, controlled by values stored in a frame buffer. The electron beam scans across each line from left to right, then returns to the left side to draw the next line, in a process called horizontal retrace. After completing the frame, the beam returns to the top left corner for the next frame during vertical retrace. Interlacing displays every other line to reduce flicker.

Computer Graphics

Ankur Soni

The document discusses computer graphics and various display technologies. It describes raster and vector display systems used in computer graphics. Raster systems store and display images as a grid of pixels using a process called scan conversion. Each pixel is stored in a frame buffer and refreshed rapidly to display the image. Vector systems draw images as geometric objects and lines. Common display technologies discussed include cathode ray tubes (CRT), liquid crystal displays (LCD), and plasma displays. Applications of computer graphics mentioned include computer-aided design (CAD), multimedia, visualization, and entertainment.

2D transformation (Computer Graphics)

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Color Models Computer Graphics

dhruv141293

A color model specifies a color space and visible subset of colors within it. There are four main hardware-oriented color models: RGB, CMY, CMYK, and YIQ. However, these are not intuitive for describing color in terms of hue, saturation and brightness. Therefore, models like HSV, HLS, and HVC were developed which relate more directly to human perception of color. The RGB and CMY models represent colors as combinations of red, green, blue and cyan, magenta, yellow primary colors respectively and are used in monitors and printing.

Image Quantization

Anish Chhetri

INTERACTIVE FLAT PANELS | VAMAA

VAMAA

We manufacture and market E-Education Equipment products Under the brand name VAMAA. Our products are a combination of an essential core technology, continued innovation, award-winning design and competitive Price performance. We are a leading manufacturer of the top-notch Interactive Flat Panels of multiple sizes. VAMAA Interactive Flat Panel display adapts world’s top-class infrared positioning technology. Our flat panels are high-quality, provide great performance, and are very cost-effective. We are here to bring a revolution in education and corporates. Our panel display has a narrow frame design, 4K UHD resolution, Multi-touch points loaded with latest Android 11.0 with Google Play Support. . It comes with a life of 30,000 hours. The screen has a hard surface with zero bonding technology and an anti-glare and anti-scratch coating on the top. Get in touch with us and place your order to book an Interactive Flat Panel for your school or for your office.

Overview of the graphics system

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Flat Panel Display

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LCD Display

Aakash Goyal

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.

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The document discusses the flat panel display industry and focuses on liquid crystal displays (LCDs) and plasma display panels (PDPs). It notes that LCD technology has grown significantly from 1990-2006, with thin-film transistor LCDs now dominating the market. The document also describes the geographic distribution of LCD manufacturers and suppliers, with companies from Taiwan, Korea, Japan, the US, and increasingly China playing major roles. It discusses how research and development has moved along with investment and production to different countries over time.

Cathode ray tube

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Cathode ray tubes use an electron gun and fluorescent screen to create images through light emitted from the screen. An evacuated glass envelope contains the electron gun, which shoots electrons at the screen, causing phosphors to glow and form the image. Color CRTs use three electron guns and phosphors to produce red, green, and blue light, creating a full color image. While bulky and potentially hazardous, CRTs provide high quality images through superior color and contrast compared to other display technologies.

Display Technologies ,OLD,NEW,Next Generation technologies

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Cathode ray tube (CRT) displays were commonly used but are being replaced by newer technologies. CRTs use electron guns and phosphors to display images but have disadvantages like large size, weight, and power consumption. LCD displays use liquid crystals and do not emit light, instead blocking light to produce images. They are thinner and more energy efficient than CRTs but have limited viewing angles. Plasma displays utilize cells of charged gases to produce bright, large displays but also consume more power than LCDs. Newer technologies continue to improve on displays, with OLED providing thinner, more efficient self-emissive panels, LED backlights enhancing LCDs, and higher resolution 4K becoming more common.

Plasma display panel

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Plasma is a state of matter similar to gas in which some particles are ionized. Plasma TVs use small cells filled with ionized gas that produce light when electricity is applied. When UV light from the ionized gas hits phosphors, visible colors are produced to display an image. Plasma TVs offer advantages like exceptional color, high resolution, and widescreen ratios but also have disadvantages such as shorter lifespan, fragility, higher price, and potential image burn-in.

Raster Display(1)

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The document discusses raster graphics and how images are displayed. It covers several topics: 1) Display hardware such as CRT, LCD, and other devices used to output images. 2) Raster graphics systems and how imaging systems are organized with a frame buffer and refresh rate. 3) Output primitives like points, lines, polygons that are used to describe shapes. It discusses algorithms for drawing lines like DDA and Bresenham. 4) Color models for representing and describing colors in raster graphics.

Graphics display-devicesmod-1

Praveen Kumar

This document provides an overview of computer graphics hardware and software. It defines computer graphics as using a computer to define, store, manipulate, interrogate and present pictorial output. The key hardware components discussed are display devices like CRT, LCD, and plasma displays. Software components include rendering primitives, algorithms for transformation and rasterization, and application programming interfaces that provide access to graphics hardware. The graphics rendering pipeline is described as the process of converting a 3D scene model into a 2D image through steps like modeling transformations, viewing transformations, projection, clipping and rasterization.

The Cathode Ray Tube

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The Cathode Ray Tube (CRT) is a type of monitor that was first discovered in the late 19th century and remained popular for over 70 years. It works by using an electron gun to emit light onto phosphors on the inside of a glass screen, creating vivid colors and detailed images. While CRTs are bulky, power-hungry, and can emit small amounts of radiation, they were less expensive than newer LCD displays and provided good image quality from any viewing angle until being replaced by flat panel displays.

4K Display Technology

Ankit Zalawadiya

The document discusses 4K display technology, including its higher resolution specifications of 3840 x 2160 pixels, which is four times the pixels of 1080p. It also discusses the Rec. 2020 color standard, which defines aspects of ultra high definition TV like wider color gamut. Frame rates for 4K include up to 120p, and the technology allows closer viewing distances without pixels being visible. Implementation of 4K requires upgrades to broadcast and entertainment infrastructure.

Display Systems

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Raster scan systems use a video controller to control the display device and refresh the screen. The video controller is given direct access to a frame buffer in system memory. It refreshes the screen by incrementing through pixel coordinates stored in the frame buffer and using the stored intensity values to set the intensity of each pixel on the CRT monitor. More advanced systems use separate display processors and multiple frame buffers to speed up processing and enable real-time animation.

Computer graphics

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The document discusses various types of raster images and display technologies. Raster images represent pictures as a grid of pixels stored as numerical values. Grayscale images vary pixel depth to generate different colors. Color images use three values per pixel. Display technologies discussed include CRTs, LCDs, plasma displays, and other emissive and non-emissive displays. CRTs use electron guns and phosphors to generate images while LCDs use liquid crystals and polarized light.

Crescent Pure - Case Review

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Raster animation

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Raster animation is created by displaying a sequence of raster images rapidly to create the illusion of motion. Each raster image is stored as a bitmap in system memory and contains information about individual pixels that make up the image. By refreshing the frame buffer with a new bitmap, raster animation is created. There are two main types - traditional using sprite sheets and modern using programming languages. Raster animation provides more realistic images than vector animation but requires more memory and processing power. It is used for applications like 3D/2D animation, games, and movies.

Plasma display pannel

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Plasma display panels (PDPs) use plasma technology to provide a flat panel display option. PDPs contain two glass plates separated by an inert gas that is ionized by an electrical current to produce visible light. This allows each pixel to emit red, green, or blue light independently. PDPs offer advantages over other displays like fast response time, wide viewing angles, low weight, and simple manufacturing. They are well-suited for applications like HDTV monitors. However, PDPs also have disadvantages compared to liquid crystal displays like higher power consumption and narrower viewing angles.

CG - Display Devices

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This document provides information about different types of display devices used in computer graphics. It discusses cathode ray tube (CRT) displays, including how CRTs work using an electron gun and accelerating electrons to excite phosphors to emit light. It describes raster scan displays, which draw images as a grid of pixels by sweeping an electron beam across the screen, and random scan displays, which draw images line by line. The document also covers color CRT displays using beam penetration or a shadow mask to combine red, green, and blue phosphors at each pixel location.

Tv transmitters & receiver

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The document describes the key components of television cameras and how they work. It discusses different types of camera pickup tubes including vidicons and plumbicons. Vidicons use a photoconductive target while plumbicons have faster response times and can produce high quality pictures at low light levels. Later, charge-coupled device (CCD) cameras replaced tubes and allowed for miniaturization. Color cameras use three separate electron guns and a shadow mask or aperture grille to separate the red, green, and blue phosphor dots on the screen. Picture tubes use an electron beam and deflection yoke to display the image on phosphors on the inside of the screen.

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