ppt on flat panel display

Group membersAlisha KorpalNivia JainSharuti Jain

A video display device is a device for visual or tactile presentation of images(including text) acquired, stored, or transmitted in various forms.

CRT

Flat panel Displays

The cathode ray tube (CRT) is a vacuum tube containing an electron gun (a source of electrons) and a fluorescent screen, with internal or external means to accelerate and deflect the electron beam, used to create images in the form of light emitted from the fluorescent screen. 

A single electron gun for a single color monitor

Phosphorus screen

High dynamic range

excellent color

The color range of CRTs is unmatched by any display type except OLED

Can display in almost any resolution and refresh rate

Sub-millisecond response times

Large size and weight

High power consumption

Generates high of heat

Can suffer screen burn-in

Produces noticeable flicker at low refresh rates

A class of video devices that have reduced volume , weight & power requirement than refresh CRT.

Currently they are used in pocket videos , laptop etc.

Emissive displays

Plasma panels

Electroluminescent displays

Non emissive displays

LCD

Emissive display are device that convert electrical energy into light

Image is directly produced on the screen

Phosphorus convert electron beam or UV light into visible light.

Light is produced behind the screen and the image is formed by filtering this light.

Liquid Crystal Display

Portable

Less desk space

Lack of flicker and low glare reduce eyestrain.

A liquid crystal is an organic compound in a transition state between liquid and solid forms that resemble a liquid.

Lightweight construction

Thin panels

Low energy consumption

Quality of image depends on viewing angle

Low response times

A plasma display panel (PDP) is a type of flat panel display.

They are called "plasma" displays

Technology utilizes small cells containing electrically charged ionized gases commonly known as fluorescent lamps.

Large displays

Good color rendering

Thin panels

No dependence on viewing angle

Brightness

High costs

Power consumption