The brightness of micro-distance LED display depends on the current flowing into the LED beads and the brightness function of the LED beads themselves. The higher the applied current of LED beads, the greater the luminous brightness of micro-distance LED display screen. Excellent quality LED beads have outstanding light conversion rate. Minimal applied current can announce high luminous light, which has advantages of saving power consumption and maintaining the stability of micro-distance LED display screen.
2. Effect of lamp beads on runaway rate of LED display with small spacing
Because the micro-distance LED display screen is composed of tens of thousands or even hundreds of thousands of sets of red, green and blue LED pixels, the failure of any color LED will affect the overall visual effect of the display screen. Generally speaking, according to industry experience, the loss of power should not be more than three-tenths of ten thousand before the LED display is installed 72 hours after aging, and the loss of power of high-quality LED beads is very low. The runaway rate of micro-distance LED display with high-quality LED beads can be controlled in 100,000 parts. One is below.
3.The influence of lamp beads on the life of LED display screen with small spacing
The theoretical life of LED beads is 100,000 hours, which is much longer than the working life of other parts of micro-distance LED display screen. Therefore, only the quality assurance of LED beads, suitable working current, reasonable PCB heat dissipation planning and careful production process of the display screen are needed. LED beads will be one of the most useful components in the whole display screen, and the micro-selection of high-quality LED beads is needed. The service life of the LED display can reach 100,000 hours and the MTBF can reach 50,000 hours.
4. Effect of lamp beads on viewing angle of LED display with small spacing
The angle of micro distance LED display is decided by the angle of LED bead. Nowadays, indoor display screen mostly uses LED beads with horizontal or straight view angle, which makes the level/straight view point of micro-distance LED display reach 160 degrees of view angle.
5. Influence of lamp beads on pixel distance of LED display screen with small spacing
The size of the LED bead affects the pixel distance and the whole screen resolution of the LED display. SMD0707 LED beads are mainly used with the micro-distance LED display below P1.5, SMD1010 LED beads are mainly used for P1.6, P1.9, P2.0 micro-distance LED display, SMD2121 LED beads are mainly used for P2.5, P3 micro-distance LED display. On the premise of unchanged point distance, LED beads can increase the size of the display area, reduce the sense of particles, but because of the black area reduction, will reduce the contrast; on the contrary, LED beads reduce the scale, reduce the display area, increase the sense of particles, increase the area of the black area, add contrast.
6. Effect of lamp beads on luminance / chroma / white balance consistency of small spacing LED display screen
Micro-distance LED display 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 chroma consistency of the whole display screen. Generally speaking, display manufacturers require equipment suppliers to supply 5nm wavelength and 1:1.3 luminance LED beads, which can be graded by equipment suppliers through spectrophotometer. Because LED beads have viewpoints, micro-distance LED displays have the same viewpoint orientation, that is, when viewed from different viewpoints, their brightness will increase or decrease. In this way, the view consistency of red, green and blue LED will seriously affect the consistency of the white balance of different viewpoints, and directly affect the fidelity of the video color of the display screen. To achieve the matching consistency of the brightness changes of red, green and blue LEDs at different viewpoints, it is necessary to make strict scientific planning on the packaging lens planning and raw material selection, which depends on the technical level of packaging suppliers. If the normal direction white balance of the display is better, if the LED beads'viewpoint consistency is not good, the whole screen white balance effect of different viewpoints will be bad. The viewpoint consistency characteristics of LED beads can be measured by an integrated LED viewpoint tester, especially for medium and advanced display screens.
7. The influence of lamp beads on the static electricity of LED screen screen with small spacing.
LED lamp beads are semiconductor devices, sensitive to static electricity, very easy to lead to static failure, so anti-static ability to the life of the display is very important. High quality LED beads can satiate 50Hz, 1500V (AC RMS) test voltage for 1 minute without insulation breakdown.
8. Effect of lamp beads on attenuation characteristics of LED display with small spacing
LED display after a long period of work will show a decline in brightness and display color is not consistent with the phenomenon, mainly because of the brightness of the LED beads caused by attenuation. The attenuation of LED bead brightness will result in the decrease of the whole screen brightness. Red, green, blue LED brightness fluctuations will form the inconsistency of LED display color, which is what we often say the phenomenon of display screen spent. High quality LED beads can control brightness attenuation. According to the standard of 1000 hours room temperature lighting 20mA, red attenuation should be less than 2%, blue and green attenuation should be less than 10%, so blue and green LED in the display screen planning as far as possible do not use 20 mA current, it is best to use only 70% to 80% of the rated current. The attenuation characteristics are related to the characteristics of red, green and blue LEDs, but the attenuation is affected by the current, PCB board heat dissipation planning and the operating environment temperature of the display screen.