Correct Answer - Option 2 : Liquid Crystal Display
LCD stands for Liquid Crystal Display.
Liquid Crystal Display:
- A liquid-crystal display (LCD) is a flat-panel display or another electronically modulated optical device that uses the light-modulating properties of liquid crystals combined with polarizers.
- Liquid crystals do not emit light directly, instead of using a backlight or reflector to produce images in color or monochrome.
- LCDs are available to display arbitrary images (as in a general-purpose computer display) or fixed images with low information content, which can be displayed or hidden.
- For instance: preset words, digits, and seven-segment displays, as in a digital clock, are all good examples of devices with these displays.
- They use the same basic technology, except that arbitrary images are made from a matrix of small pixels, while other displays have larger elements.
- LCDs can either be normally on (positive) or off (negative), depending on the polarizer arrangement.
- For example, a character positive LCD with a backlight will have black lettering on a background that is the color of the backlight, and a character negative LCD will have a black background with the letters being of the same color as the backlight.
- Optical filters are added to white on blue LCDs to give them their characteristic appearance.
- LCDs are used in a wide range of applications, including LCD televisions, computer monitors, instrument panels, aircraft cockpit displays, and indoor and outdoor signage.
- Small LCD screens are common in LCD projectors and portable consumer devices such as digital cameras, watches, digital clocks, calculators, and mobile telephones, including smartphones.
Hence, the term "LCD" is an abbreviation, meaning "liquid crystal display."
