What's the difference between LED and LCD on TV screen
Author:ke634620713 Time:2021-10-05 12:28 Browse(581)
A light source is needed behind the LCD to illuminate the screen. At present, most notebook computers use cold cathode fluorescent lamp (CCFL). The physical characteristics of cold cathode fluorescent lamp determine the limitations of its panel in color display and low energy utilization efficiency. It needs high voltage AC drive, and the requirements for the power transformer rectifier group are relatively complex, and the service life is not long - many LCD products will turn yellow and the brightness will be significantly dimmed after several years of use.
A light source is needed behind the LCD to illuminate the screen. At present, most notebook computers use cold cathode fluorescent lamp (CCFL). The physical characteristics of cold cathode fluorescent lamp determine the limitations of its panel in color display and low energy utilization efficiency. It needs high voltage AC drive, and the requirements for the power transformer rectifier group are relatively complex, and the service life is not long - many LCD products will turn yellow and the brightness will be significantly dimmed after several years of use. Using white LED instead of CCFT as the backlight of laptop display is to reduce the power consumption of laptop display screen and enhance environmental protection. LED is the abbreviation of light emitting diode (LED). It is made of several thin layers of doped semiconductor materials. One layer has excessive electrons, and the other layer lacks electrons to form a positively charged "hole". When the current passes through, the electrons and holes combine with each other, and the excess energy is released in the form of light radiation. Compared with the existing CCFT technology, LED technology has a lot of advantages: better screen brightness uniformity, strong color expression. LED backlight panel has considerable development space in notebook panel, mainly for the thickness and weight requirements of some notebook market segments. The LED backlight board does not need a lamp, so the thickness of the light guide board is greatly reduced, and the thickness of the whole backlight board can be reduced by about half. The advantage of LED backlight board is that it is thin, lightweight, no converter, mercury free and power saving.

What's the difference between LED and LCD on TV screen

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