A display is a device that shows a rendered electronic image made up of pixels that are illuminated in a way that distinguishes text and graphic elements. It is an output device for presentation of information in visual or tactile form. Displays are used in conjunction with devices such as keyboards and trackpads, allowing users to interface with a computer and view stored, generated, or transmitted data in the form of text and graphics. Some displays can show only digits or alphanumeric characters, and they are called segment displays, which are composed of several segments that switch on and off to give the appearance of the desired glyph.
Displays include multiple layers of material that together provide the structure necessary to render an image onto the screen. The exact components depend on the underlying display technology. There are different types of displays, including:
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Light-emitting diode (LED) display: This is a type of LCD that uses a set of LEDs as its light source, rather than the types of backlights used for LCD displays. LED technology is generally smaller and lighter than the original LCD.
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CRT (cathode ray tube) monitor: This is a type of display device that uses a cathode ray tube to display images.
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Flat-panel display: This is a type of display that uses two sheets of polarizing material with a liquid crystal solution between them. An electric current passed through the liquid causes the crystals to align so that light cannot pass through them, creating an image.
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Quantum dot display (QLED): This is a type of display that uses quantum dots to enhance the color and brightness of the display.
Displays can also be used to show a collection of things in an organized way for people to see, such as in a museum or store window.
