created by : Sudipta mondal faculty of BCET

1. LIQUID CRYSTAL DISPLAY (LCD)

2. What Is LCD??? A liquid crystal display (LCD) is a thin, flat panel used for electronically displaying information such as text, images, and moving pictures. Its uses include computer monitors ,televisions , instrument panels, and devices ranging from aircraft cockpit displays, to every-day consumer devices such as clocks , calculators, and telephones. It is an electronically-modulated optical device made up of any number of pixels filled with liquid crystals and arrayed in front of a light source(backlight) or reflector to produce images in color or monochrome.

3. What is a liquid crystal???? The term “liquid” crystal refers to the fact that these compounds have a crystalline arrangement of molecules yet they flow like a liquid.

4. VARIOUS APPLICATIONS OF LCD

5. TYPES OF LCD TECHNOLOGY As LCD technology evolves, different techniques for producing color emerge. Passive-matrix technologies(flat panels). Active-matrix or TFT (thin film transistor) technology produces color and images as sharp as any CRT.

6. COMPONENTS & THEIR FUNCTIONS An LCD monitor consists of five layers: Backlight, Sheet of polarized glass “Mask" of colored pixels, Layer of liquid crystal solution responsive to a wired grid of x, y coordinates second polarized sheet of glass. By manipulating the orientations of crystals through precise electrical charges of varying degrees and voltages, the crystals act like tiny shutters, opening or closing in response to the stimulus, thereby allowing degrees of light that have passed through specific colored pixels to illuminate the screen, creating a picture.

7. ON STATE OFFSTATE

8. COLOR DISPLAY In color LCDs each individual pixel is divided into three cells, or subpixels, which are colored red, green, and blue, respectively, by additional filters. Each subpixel can be controlled independently to yield thousands or millions of possible colors for each pixel. A Subpixel Of A Color LCD

10. ADVANTAGES

11. DISADVANTAGES

12. Thanking You, ANINYA SAHA ANNESHA PAUL