What's the difference between LED screen and LED backlight? I'm dizzy!
Author:Wang Luca Time:2021-08-01 16:51 Browse(946)
The back of LCD
The back of LCD needs a light source to illuminate the screen.
at present, most notebook computers use cold cathode fluorescent lamp (CCFL).
the physical characteristics of CCFL determine the limitations of color display and low energy efficiency of its panel, which requires high voltage AC drive, so the requirements of power transformer rectifier group are relatively complex, Moreover, the service life is not long - many LCD products will turn yellow and the brightness will be significantly dimmed after a few years of use   White LED is used to replace CCFT as the backlight of notebook display.

What's the difference between LED screen and LED backlight? I'm dizzy!

the purpose is to reduce the power consumption of the display screen of notebook computer and enhance the environmental protection.
LED is the abbreviation of light emitting diode.
it is made of several thin layers of doped semiconductor materials, one layer has excessive electrons, the other layer lacks electrons and forms positively charged "holes", During the operation, the current passes through, the electrons and holes combine with each other, and the excess energy is released in the form of light radiation.
the results show that 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 uniformity of screen brightness and strong color expression.
LED backlight panel has considerable development space in notebook panel.
it is mainly aimed at the thickness and weight requirements of some notebook market segments.
because LED backlight panel does not need light tubes.
therefore, the thickness of light guide plate is greatly reduced, The thickness of the whole backlight panel can be reduced by about half.
the advantage of LED backlight panel lies in the thin backlight panel.
light weight, no converter, mercury free and power saving.
.
LED is a crystal light-emitting diode.
LED is a crystal light-emitting diodeThe liquid crystal itself does not emit light actively, but is displayed by the light source installed on the side or back of the liquid crystal screen.
the backlight includes fluorescent tubes and LEDs.
the so-called LED backlight is the backlight made of crystal light-emitting diodes.
.
.
the backlight is made of crystal light-emitting diodes
Related topics