What is LCD TV backlight?
Author:Song Lili Time:2021-07-20 15:43 Browse(718)
LCD displays images through backlight, as you can imagine. As we watch film movies, every LCD pixel is like a small window with a door that can be opened or closed. When the door is opened, we can see the light, that is, the light behind. But the actual principle is much more complex, in fact, the backlight level is deflected, so that we can see different colors of pixels.
LCD displays images through backlight, as you can imagine.

What is LCD TV backlight?

it's like watching a film.
every LCD pixel is like a small window, with a door that can be opened or closed. When the door is opened, we can see the light, which is the light behind.
but the actual principle is much more complicated.
in fact, the backlight level is deflected, In this way, we can see pixels of different colors.
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there are two kinds of backlights now.
one is CCFLs (cold cathode fluorescent lamps) and the other is led.
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traditional LCD devices use CCFLs (cold cathode fluorescent lamps) as the light source, although the name is very professional, But we think of it as a fluorescent lamp at home, But the lamp tube is very thin.
the color of many objects under the fluorescent lamp is very strange.
because the light it emits is not the real sunlight.
the sunlight that we have been used to is composed of red, orange, yellow, green, cyan, cyan, purple and other colors according to a certain proportion.
but the light of fluorescent lamp is overemphasized in some colors.
some colors are badly lacking.
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in the light of fluorescent lamp The problem arises.
the color of the light source behind the light box is not accurate enough, and the image generated through the LCD panel can not overcome its inherent shortcomings, This is one of the reasons why it is difficult for LCD to satisfy professional users in image display.
.
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therefore, an advanced liquid crystal solution is produced.
LED is used to replace the traditional liquid crystal backlight module.
LED is used to replace the traditional liquid crystal backlight module
advantages of LED backlight technology:
high brightness.
and stable brightness and color performance can be achieved within the service life.
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wider color gamut (more than NTSC and EBU gamut).
achieve more brilliant colors.
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adjustable white balance of backlight.
while ensuring the overall contrast.
when the user's video source switches between the computer and DVD player.
when the user's video source switches between the computer and DVD player.
when the user's video source switches between the computer and DVD player The white balance can be easily adjusted between 9600k and 6500k, And it will not sacrifice brightness and contrast.
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real time color management.
due to the independent red, green and blue light emission.
it is easy to accurately control the current display color characteristics.
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it can provide continuous array light source for large screen.
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reduce the artificial trace of dynamic scene.
it will not sacrifice brightness and life.
because of the flashing frequency of traditional CCFL lamp Low.
dynamic scene may cause picture jumping.
LED backlight can flexibly adjust the luminous frequency.
and the frequency is much higher than CCFL, so it can perfectly present the moving picture.
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the brightness adjustment range is large.
it is easy to realize LED power control.
unlike CCFL, there is a threshold for the minimum brightness.
therefore.
no matter in bright outdoor or all black indoor, It is easy for users to adjust the brightness of the display device to the most pleasing state.
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wide temperature range, low voltage, impact resistance.
because of the use of solid-state light-emitting devices.
the LED backlight has no delicate parts, so it has strong adaptability to the environment.
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the LED backlight has no delicate partsLow electromagnetic radiation.
LED light source does not produce any radiation.
nor toxic substances such as mercury, so it can be said that it is a green environmental protection light source.
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powerful.
it's very detailed.
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it's a green environmental protection light source
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