Nestekidenäyttö

Nestekidenäyttö, often abbreviated as LCD (Liquid Crystal Display), is a type of flat panel display that utilizes the light-modulating properties of liquid crystals. These crystals do not emit light themselves but rather block or allow light to pass through from a backlight source, such as a fluorescent lamp or an LED array. The arrangement of liquid crystals is controlled by electrical signals applied to them, which in turn manipulates the polarization of light.

An LCD screen consists of several layers, including polarizing filters, a liquid crystal cell, and a color filter if a color display is required. When an electric current is applied to a segment of the liquid crystal, its molecules align in a specific way, altering the direction of polarized light passing through it. By controlling the voltage applied to each pixel, the amount of light that passes through can be precisely adjusted, creating different shades of gray or colors.

The primary advantage of LCD technology is its low power consumption compared to older display technologies like CRT (Cathode Ray Tube) monitors. They are also relatively thin and lightweight, making them ideal for portable devices like laptops and smartphones, as well as for televisions and computer monitors. However, LCDs can have limitations in terms of viewing angles and response times, although advancements in technology have significantly improved these aspects over time.