![]() ![]() Whether the image signals are digital or analog, the computer must be able to communicate with the display. And a more recent type of LED is the quantum dot LED ( QLED), which incorporates a layer of nanoparticles to improve color and luminance.Įxample of a modern liquid crystal display A newer type of LED is the organic LED ( OLED), which uses an organic polymer as the semiconductor material. LED technology is generally smaller and lighter than the original LCD. An LED display is a type of LCD that uses a set of LEDs as its light source, rather than the types of backlights (often cold cathode fluorescent lamps) used for LCD displays. Because of its thinner profile and lower power consumption, LCDs have replaced CRTs for most computing needs. LCDs are generally available in three panel types: twisted nematic (TN), in-plane switching ( IPS) and vertically aligned (VA). The display's pixels are switched on or off electronically as the liquid crystals rotate the polarized light. LCDs work by blocking light rather than creating it. To generate an image, the LCD uses liquid crystal sandwiched between two panes of polarized glass, with a backlight illuminating the glass. The LCD is a type of flat-panel display that is much thinner and lighter than the CRT. For laptop and tablet computers the display is integrated into the unit with the processor and other components. Even so, the terms display and monitor are often used interchangeably, and they're both sometimes called video display terminals ( VDTs ). All monitors include displays, but not all displays are monitors. A display is not the same thing as a monitor. In other computer systems, such as desktops, the display is packaged in a separate unit called a monitor, which is connected to the computer either directly or indirectly over a network. In some computers, such as laptops or tablets, the display is integrated into the unit, along with the processor and other computer components. Displays, used in conjunction with devices such as keyboards and trackpads, allow users to interface with a computer and view stored, generated or transmitted data in the form of text and graphics. The exact components depend on the underlying display technology. A display includes multiple layers of material that together provide the structure necessary to render an image onto the screen. ![]()
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