What is the liquid crystal display?

Liquid crystal displays (LCD) are a type of flat monitor device that draws the image using sandwich layers of glass, electrodes and liquid crystals (LCS). These LCs are physically liquid, although they also show a number of crystal properties in the way of molecules. The unique LC properties allow them to predict alignment when the electric current is introduced. This can be used in the liquid crystal display to activate discrete, monochrome patterns such as on an hourly radio or small pixels in a high -resolution computer monitor. Liquid crystal displays are located in items from watch to mobile phones and computers with laptops. Usually there is a layer of LC, which is inserted between the electronics necessary to activate them, one or more layers of glass and polarizers or reflectors. LCD, which rely on outer light, will usually have a high expression like a rear layer so that the light can pass LCS and return to the viewer's eyes. Other displays of liquid crystalsThey use the backlight instead of the reflector, so the device requires no external light source. Polarizing layers are usually necessary because of the way LC rotate to block or allow light.

The simplest form of liquid crystal display uses a type of passive matrix. These displays have individual electrical connections for each discrete part of the LCS, which is effective in dealing with several elements found in devices such as clocks, calculators and watches. More complicated LCDs can also use passive matrix displays, although technology becomes less efficient when more elements are added. The first laptop screens use LCD with a passive matrix, although the active matrix technology took over in the middle of the 90s.

The liquid crystal display uses an active matrix can use one of about five different technologies to create a visible image. Each of these different techWith the active matrix, it uses transistors of thin films (TFT) to power each individual pixel on the display. Some active Matrix LCDs also use diodes and other components, although they all use TFT to create a sharper and responsive image. Since active matrix technology allows faster refresh frequencies, sharper images and better colors, this type of liquid crystal display is located in various applications, including flat -screen TVs, notebooks and mobile phones. Many TFT LCD also includes a specialized layer that can turn them into touch screen.