what is LCD - liquid crystal display?

Short for liquid crystal display, a type of display used in digital watches and many portable computers. TFT LCD Module utilize 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. Each crystal, therefore, I2C Lcd Module is like a shutter, either allowing light to pass through or blocking the light.Monochrome LCD images usually appear as blue or dark gray images on top of a grayish-white background. Color LCD displays use two basic techniques for producing color: Passive matrix is the less expensive of the two technologies. The other technology, called thin film transistor (TFT) or active-matrix, produces color images that are as sharp as traditional CRT displays, but the technology is expensive. Recent passive-matrix displays using new CSTN and DSTNtechnologies produce sharp colors rivaling active-matrix displays.Most LCD screens used in notebook computers are backlit, or transmissive, to make them easier to read.