Full color LED display display directly related to the user, the audience, in order to get a perfect experience, need to control and improve the quality of LED display. So, how to control and improve the quality of LED full color display? Reflect the full color LED display dedicated LED quality is an important indicator of what?
First, LED devices as a full-color LED display the most critical components, for three reasons:
First of all, LED is the full color screen machine used in the largest number of key devices, each square meter will use thousands to tens of thousands of LED;
Second, LED is the main decision to determine the performance of the main screen, a direct impact on the audience's evaluation of the display;
Again, LED in the overall cost of the display in the proportion of the largest, ranging from 30% to 70%. LED selection determines the quality of the entire display more than 50%. If you can not choose a good LED, the other parts of the display no matter how good can not make up for the defects of the display quality.
Reflect the full color LED display dedicated LED quality of the important indicators are:
First, the failure rate
As the full color display by tens of thousands or even hundreds of thousands of groups of red, green and blue LED composed of three elements, any color LED failure will affect the overall visual effects of the display. In general, according to industry experience, in the LED display began to fit 72 hours before the failure of the failure rate should not be higher than three thousandths (referring to the LED device itself caused by the failure).
Second, anti-static ability
LED is a semiconductor device, sensitive to static electricity, easily lead to electrostatic failure, so the anti-static capacity of the display life is essential. In general, LED body electrostatic mode test failure voltage should not be less than 2000V.
Third, consistency
Full color display is composed of numerous red, green, blue LED composition of the elements of each, the brightness of each color LED, wavelength consistency determines the brightness of the entire display consistency, white balance consistency, color consistency. In general, the display manufacturer requires the device supplier to provide 5nm wavelength range and 1: 1.3 brightness range of the LED, these indicators can be device suppliers through the classification of color separation machine to achieve. The consistency of the voltage is generally not required.
Four, brightness
LED brightness is an important determinant of the brightness of the display. LED brightness is higher, the greater the use of current margin, to save power, to maintain stability of the LED is good. LED has a different angle value, the chip brightness has been set in the case, the smaller the angle, LED is brighter, but the smaller the viewing angle of the display. Generally should choose 100 degrees of LED to ensure that the display screen enough angle. For a different point spacing and different line of sight of the display, should be in brightness, angle and price to find a balance point.
Five, attenuation characteristics
Red, green and blue LEDs all have the characteristics of brightness attenuation as the working time increases. LED chip of the pros and cons, auxiliary materials and the quality of the packaging process determines the level of the decay of the LED speed. In general, the attenuation of the red LED should be less than 10% after 1000 hours of 20 milliampere, and the attenuation of the blue and green LEDs should be less than 15%. Red, Green, and Blue attenuation are consistent for full color LED display Screen white balance after a great impact, and thus affect the display fidelity display.