The principle of LCD backlight is that the reflector, light guide plate, upper and lower BEF, LED light bar and plastic frame iron frame are assembled together. When the LED light bar is powered on, the component emits side view light, which becomes flat light after passing through the light guide plate, providing backlight for LCD display. source. You're probably used to the idea that your computer screen makes letters and numbers using a tiny grid of dots called pixels. Early computers used just a few pixels and looked very dotty and grainy, but a modern LCD screen uses millions of pixels and is almost as clear and sharp as a printed book. Calculators, however, remain stuck in the dark A computer monitor, technically termed as visual display unit is an output device that presents the information from the CPU on the screen working as an interface between CPU and the user. A cable connects the monitor to a video adaptor or video card which is set up on the motherboard of the computer. The CPU (Central Processing Unit) sends instruction to the video adaptor telling what needs An active-matrix liquid-crystal display ( AMLCD) is a type of flat-panel display used in high-resolution TVs, computer monitors, notebook computers, tablet computers and smartphones with an LCD screen, due to low weight, very good image quality, wide color gamut and fast response time. The concept of active-matrix LCDs was proposed by Bernard J Principle of operation of a normally white TN LCD panel. When no electric field is applied (a), the helical structure of the LC molecules rotates the vertically polarized light so that it can pass Less glare: Due to the material of the LCD screen, less light is reflected at the user. Same with “no flicker”, this results in less eye strain. Brightness: LCD monitors are brighter than the traditional CRTs. Less distortion: Using a direct digital input from the graphics card produces cleaner ‘output’. How Touchscreens Work. A resistive touchscreen works by having the top of the display that you touch come in contact with an electrically conductive layer underneath it. That layer below always has an electrical current running through it. When the two layers touch, the stream changes and registers your touch. qVZ1h.

lcd panel working principle