What does LED backlight mean
Author:He Luqin Time:2021-07-29 17:56 Browse(808)
LED backlight refers to the use of LED (light emitting diode) as the backlight of LCD. Compared with the traditional CCFL (cold cathode tube) backlight, LED has the characteristics of low power consumption, low calorific value, high brightness and long service life, which is expected to completely replace the traditional backlight system in recent years.
LED backlight refers to the use of LED (light emitting diode) as the backlight of LCD.
compared with the traditional CCFL backlight.
LED has the characteristics of low power consumption, low calorific value, high brightness and long service life, which is expected to completely replace the traditional backlight system in recent years.

What does LED backlight mean

LED backlight has the advantages of low power consumption, low calorific value, high brightness and long service lifeIn the electronic industry.
backlight is a form of lighting, which is often used in LCD displays.
the difference between backlight and front light is that the backlight irradiates from the side or from the back.
while the front light irradiates from the front as the name implies.
they are used to increase the illumination in low light environment and computer display The brightness of the LCD screen.
produces light in a similar way to CRT display.
the brightness of the LCD screen is higher than that of the CRT displayThe light source may be incandescent bulb, electro-optic panel (ELP), light-emitting diode (LED), cold cathode tube (CCFL), etc.
the electro-optic panel provides uniform light on the whole surface.
while other backlight modules use the diffuser to provide uniform light from the non-uniform light source.
The backlight can be any color.
monochrome liquid crystal usually has yellow, green, blue, white backlight.
while color display uses white light.
because it covers the most color light.
the backlight can be used for color displayLED backlighting is used in compact Cheap LCD panels usually have color light.
although white backlight has become more and more common.
electro optic panels are often used in large displays.
at this time, uniform backlight is very important.
electro optic panels need to be driven by high voltage alternating current.
this part is provided by reverse converter circuits.
cold cathode tubes are used in computer displays<
the color is usually white, which also requires the use of inverter and astigmatismIncandescent backlight is used when high brightness is needed.
however, the disadvantage is that the life of incandescent bulb is very limited, and it will generate a lot of heat.
the incandescent backlight is used when high brightness is neededLED backlight can improve the color performance of LCD display.
LED light is generated by three different LEDs.
it provides a color spectrum that is quite consistent with the LCD image point color filter itself.
.
note that led and LED backlight are two concepts.
cheap laptops are now hyping LED backlight screen, but in fact it is only an upgraded version of LCD technology, The LED backlight still uses the lamp behind the screen to illuminate the LED liquid crystal, and uses the change of liquid crystal to display the color.
but the real LED screen is a self luminous screen.
there is no lamp behind the screen, and the current acts on the LED liquid crystal module, and the module will light up by itself, Because the luminous current required by LED itself is much smaller than that required by the original rear lamp.
so LED can play the purpose of environmental protection and energy saving! But the current LED backlight technology is not the real LED technology! Of course, the cost of LED backlight is relatively low.
the effect is better than the old-fashioned LCD, and the common screen CCFL.
is still worth buying! If you look for CCFL screen.
now the r400 series of ThinkPad uses the LED technology.
if you look for the LED technology screen.
about 15000 laptops use the real LED technology.
ordinary laptops are all LED backlight technology
.
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