What kind of influence does LED lamp bead have on the quality of display screen
Author:Lou Sheng Time:2021-10-09 11:20 Browse(701)
What are the effects of LED lamp beads on LED display?
What are the effects of LED lamp beads on LED display<
1. Viewing angle
the viewing angle of LED display depends on the viewing angle of LED lamp beads.

What kind of influence does LED lamp bead have on the quality of display screen

at present, the horizontal viewing angle of most outdoor displays is 100 ° The vertical angle of view is 50 degrees; The indoor display screen is 120 ° horizontally and vertically; Because of its particularity, the display screen on the highway usually chooses 30 degrees; The circular LED of viewing angle is enough.
some high-rise displays have higher requirements for vertical viewing angle.
viewing angle and brightness contradict each other.
large viewing angle will inevitably reduce the brightness.
the selection of viewing angle needs to be determined according to the specific use.

2. Brightness
LED brightness is the decisive factor of the brightness of display screen.
the higher the brightness of LED is.
the larger the current margin is, It is good for saving power consumption and keeping led stable.
LED has different angle values.
when the chip brightness is fixed, the smaller the angle is, the brighter the LED is, but the smaller the viewing angle of the display screen is.
generally, 100 degree LED should be selected to ensure enough viewing angle of the display screen.
for displays with different point spacing and different viewing distance.
the display screen should be in the brightness, light angle, light angle and light angle In terms of angle and price, find a balance.

3. Inefficiency
because the full-color display screen is composed of tens of thousands or even hundreds of thousands of pixels composed of red, green and blue LEDs.
the failure of any color LED will affect the overall visual effect of the display screen.
generally speaking.
according to industry experience, The failure rate should not be higher than 3 / 10000 (refers to the failure caused by the LED lamp bead itself) from the beginning of LED display assembly to 72 hours before shipment
4. Antistatic ability
LED is a semiconductor device.
it is sensitive to static electricity and is easy to cause static failure, so the antistatic ability is very important for the life of display screen.
generally speaking.
the failure voltage of LED in human body static mode test should not be lower than 2000V.

5 Life
the theoretical life of LED device is 100000 hours.
it is much longer than the working life of other parts of LED display screen, so as long as the quality of LED device is guaranteed, the working current is appropriate, the heat dissipation design of PCB is reasonable, and the production process of display screen is rigorous, LED device is one of the most durable parts in the whole display screen.

LED device accounts for 70% of the price of LED display screen.
therefore, LED device can determine the quality of LED display screen.
China is a big country of LED device production.
it is also a gathering place of LED display screen manufacturing.
the high-tech requirements of LED display screen are the future development trend.
the high-quality requirements of LED display screen, It's not only about the trend of LED display manufacturers, but also about the development of LED display device manufacturers.
from LED devices to promote the transformation of China from a big LED display manufacturing country to a powerful LED display manufacturing country.

6 Attenuation characteristics
after long-time working, LED display will appear brightness decrease and display color inconsistency.
it is mainly caused by LED device brightness attenuation.
LED brightness attenuation will cause the whole screen brightness decrease.
red, green The inconsistency of the brightness attenuation range of the blue LED will cause the color inconsistency of the LED display.
it is often said that the display is wasted.
the color of the LED display is inconsistentHigh quality LED devices can well control the brightness attenuation range.
according to the standard of lighting 20mA at room temperature for 1000 hours.
the red attenuation should be less than 2%, and the blue and green attenuation should be less than 10%. Therefore, the blue and green LED should not use 20mA current as far as possible in the design of the display screen, and it is best to use only 70% to 80% of the rated current.

the attenuation characteristics are different from the red, green and green LED The characteristics of blue LED are related to each other.
the current used, the heat dissipation design of PCB board, and the ambient temperature of display screen all affect the attenuation.

7. The size of LED device affects the pixel distance of LED display screen.
that is, the resolution.
5mm ellipse lamp is mainly used for outdoor display screen above p16.
3mm ellipse lamp is mainly used for outdoor display screen of p12.5, p12, P10, 3528 chip LED is mainly used for P6, P8 indoor display, 5050 chip LED is mainly used for p16, p12.5 and other semi outdoor display.
under the premise of constant point spacing.
the increase of LED device size can increase the display area and reduce the sense of graininess, but the decrease of black area will reduce the contrast; On the contrary, the LED size decreases, the display area decreases, the graininess increases, the black area increases, and the contrast increases.

8. Consistency
the full-color display screen is composed of numerous red, green, and blue LED pixels.
the consistency of brightness and wavelength of each color LED determines the brightness consistency, white balance consistency, and color balance consistency of the whole display screen Generally speaking,
display manufacturers require device suppliers to provide LEDs with 5nm wavelength range and 1:1.3 brightness range,These indicators can be graded by the device supplier through the spectrophotometer.
the voltage consistency is generally not required http://www.qlled.com/newsdetail_ 636_ 220_ 220. Html576 * 16=9216
a total of 9216 pixels.
it can be said that any control card on the market can be completely controlled.
just buy an ordinary one.

powerful giant color optoelectronics.
it's a good choice
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