Led lamp bead eight major impact on the led display

by:GKGD     2020-04-21
Many customers are clear, led lamp bead, Can also be called the led chip) Is the core of the is very important, for performance plays an important role, but in fact most people just know this concept, then the led lamp bead which impact on the specific? Really can separate is not much, so here are detailed to introduce the led lamp bead of the eight major influence on . 1, the influence of the LED display perspective depends on the Angle of LED lamp bead. To date, most outdoor display screen choose horizontal Angle 100 °; 50 ° and vertical perspective; Elliptical LED, indoor display, choose level is 120 ° from vertical; The SMD leds. Display on the highway 30 ° is generally selected due to its particularity; Perspective of round LED is enough. Some buildings on display for vertical Angle of the demand is higher. Perspective with brightness incompatible, big Angle will inevitably reduce brightness. View selection need according to the specific purposes to decide. 2, affect the LED brightness, brightness is an important determinant of the display brightness. LED brightness is higher, the greater the allowance of using current, is good to save electricity, stabilizing the leds. LED value has a different point of view, in the case of chip brightness is set, the smaller the Angle, the LED is more bright, but the smaller screen view. Generally should choose 100 degrees of LED display screen enough to ensure that the point of view. In view of the different spacing and different visual display, should be in brightness, Angle and find a balance on the price. 3, failure rate compared with full-color displays by tens of thousands or even hundreds of thousands of red, green, blue three kinds of LED pixels, any color LED display screen overall failure will affect visual result. In general, according to industry experience, at the beginning of the LED display assembly to aging failure rate of 72 hours before delivery should be no more than three over ten thousand ( Refers to the LED lamp bead itself causes of failure) 。 4, led lamp bead has direct influence on the life of the led theoretical service life of the device for 100000 hours, far more than the working life of the other parts, so the right led device quality guarantee, the working current, reasonable PCB thermal design, display production process is rigorous, screen machine device will be in one of the most durable components. LED devices accounted for 70% of the proportion of LED display price, so the LED device can determine the merits of the LED display quality. Is the production of LED devices power in our country, but also made the full color LED display screen. The high technical requirements of the LED display is the future trend of development, high quality requirement of the full color LED display, not just about full color LED display manufacturers, is also involved in the development of LED display screen device manufacturers. From the LED device control, and promote China made by the LED display power to the LED display manufacturing powerhouse. 5 LED is a semiconductor device, antistatic ability, is sensitive to electrostatic, easily lead to static electricity failure, so the antistatic ability is very important to the life of the screen. In general, the LED pattern of human body electrostatic voltage test failure should not be less than 2000 v. 6, attenuation characteristic of LED display screen for a long time after work will be a drop in brightness and screen color is not consistent with the phenomenon, is mainly due to the attenuation of the brightness of the LED device. LED brightness attenuation will cause the whole screen brightness to reduce. Red, green, and blue LED brightness attenuation amplitude inconsistent will cause color LED display, is often said that the screen we spent. High quality LED device can effectively control brightness attenuation amplitude. By 1000 hours at room temperature light 20 ma standards, attenuation should be less than 2%, red, blue, green attenuation should be less than 10%, in blue, green LED display screen design as far as possible not to use when 20 ma current, had better use only 70% to 80% of the rated current. Attenuation characteristics in addition to the associated with red, green and blue leds itself characteristic, using current, PCB thermal design, display affect attenuation using the environment temperature, etc. 7, the influence of size on the LED device the size of the influence of the LED display pixel distance, namely the resolution. More than 5 mm elliptic lamp is mainly used for P16 outdoor display, 3 mm elliptic lamp is mainly used for P12. 5, P12, P10 outdoor display screen, type 3528 SMD leds is mainly used for indoor display, P6, P8 2020/2121 type of SMD leds is mainly used for P2, P3 and indoor display. In the premise of same point spacing, LED device size, can increase the display area, reduce the grain feeling, but because the black area area is reduced, will reduce the contrast; On the contrary, the LED size decreases, and reduce the display area, the particles are increased, the black area area increases, increase the contrast. 8, the whole screen consistency full-color display screen is composed of thousands of red, green and blue leds of pixels, each color LED brightness, the wavelength determines the whole screen brightness consistency, the consistency of the white balance consistency, color uniformity. In general, the manufacturer of display device vendor for 5 nm wavelength range and 1:1. 3 LED brightness range, these indicators can be made of device supplier classification through the testing machine can achieve. The consistency of the voltage generally do not require.
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