Home > News > Content
LED Lamp Eight Display On LED Effect
Nov 01, 2016

1, perspective

LED display angle depends on the perspective of LED lamp. At present most of the outdoor display level angle of 100 degrees, 50 degrees; the vertical angle of the ellipse; LED, the indoor display is used for both horizontal and vertical 120 degrees; the patch LED. The display screen on the highway because of its special nature of the general selection of 30 degrees, the angle of the circular LED is enough. Some tall buildings on the screen to a higher vertical perspective. The angle of view and the brightness are contradictory, the big angle of view will certainly reduce the brightness. The choice of the visual angle should be determined according to the specific purpose.

2, brightness

LED brightness is an important determinant of the brightness of the display screen. LED brightness is higher, the use of the current margin is greater, to save power consumption, to maintain the stability of LED is good. LED has a different point of view, the chip brightness has been fixed in the case, the smaller the angle, the more bright LED, but the smaller the perspective of the display screen. Generally should choose 100 degrees LED to ensure that the display screen is sufficient perspective. To find a balance point between the brightness, the angle and the price of the display screen, which is aimed at the distance between different points and different visual range.

3, loss of efficiency

The composition of the pixel full-color display by tens of thousands or even hundreds of thousands of sets of red, green and blue three LED. The invalidation of any color of LED will affect the overall visual effect of display. In general, according to industry experience, in the LED display assembly to start aging 72 hours prior to shipment of the failure rate should not be higher than 3/10000 (referring to the failure of LED lamp itself causes).

4, antistatic ability

LED is a semiconductor device, which is sensitive to static electricity, so it is very easy to cause the failure of static electricity, so it is very important to the life of the display screen. In general, the LED of the human body electrostatic mode test failure voltage should not be less than 2000V.

5, life

The theory of life of LED devices for 100 thousand hours, far more than other parts of the LED display's working life, so long as the LED device quality assurance, working current, suitable PCB cooling reasonable design, screen production process is rigorous, LED devices will be the most durable components of a screen machine.

LED devices accounted for 70% of the price of the LED display, so that the LED device can determine the quality of the LED display. China is a big country of production of LED devices, but also the LED display system to make the gathering place. LED display of high technical requirements is the future trend of development, LED high quality requirements, not only on the direction of the LED display manufacturers, but also implicated in the development of LED display device manufacturers. From LED devices to promote China from the LED display manufacturing powerhouse to the LED display manufacturing power shift.

6, attenuation characteristics

LED display will be a long time after the work of the decline in brightness and display color is not consistent phenomenon, mainly due to the brightness of the LED device caused by the attenuation caused by. LED brightness attenuation will cause the entire screen brightness lower. The color of red, green, blue LED brightness attenuation is inconsistent will result in LED display screen color is not consistent, that is, we often say that the phenomenon of the display screen. High quality LED devices are able to control the amplitude of the brightness attenuation very well. According to 1000 hours at room temperature 20mA lighting standards, red attenuation should be less than 2%, blue, green attenuation should be less than 10%, so the blue and green LED in the display design as far as possible not to use 20mA current, rated current of only 70% to 80% of the best.

Attenuation characteristics in addition to the red, green, blue LED itself characteristics related to the use of current, PCB board cooling design, display the use of environmental temperature and so on are affected by attenuation.

7, size

The size of LED device affects the pixel distance of the LED display screen, that is, the resolution. OVAL LAMP 5mm is mainly used for more than P16 outdoor display, oval lamp 3mm mainly used for P12.5, P12, P10 outdoor display, 3528 patch LED is mainly used for indoor display, P6 P8, 2020 LED P2, P3 chip is mainly used for indoor display. In the premise of constant spacing, LED device size increases, can increase the display area, reduce the grain, but because the black area reduced, will reduce the contrast; on the contrary, the size of LED is reduced, reducing the display area, grain increased, black area increases, increase the contrast.

8, consistency

Full color display pixels made by numerous red, green and blue LED. The consistency of brightness and wavelength of each color of the LED determines the display brightness uniformity, white balance, color consistency, consistency. In general, manufacturers require the supplier to provide the 5nm display device and the wavelength range of the brightness of the 1:1.3 range of LED, these indicators by component suppliers by spectrophotometric color grading machine to. Voltage consistency is generally not required.