LED display screen is commonly used outdoor and indoor large screen display. How to choose a high performance LED display screen? LED lamp bead is the key part that affects its display effect. In the packaging process, high precision equipment is needed to produce a high
LED display screen is commonly used outdoor and indoor large screen display. How to choose a high performance LED display screen? LED lamp bead is the key part that affects its display effect. In the process of packaging, we need high-precision equipment to produce a high-performance LED display screen. Let’s briefly introduce the performance of LED display screen.
1. Antistatic ability
As a semiconductor device, LED is sensitive to static electricity, which easily leads to static failure, so the antistatic ability is very important for the life of LED display. The failure voltage of LED should not be lower than 2000V.
2. Attenuation characteristics
Generally, LED displays need to work for a long time, which will lead to the decrease of brightness and the inconsistency of display colors. This is due to the brightness attenuation of LED devices. LED brightness attenuation causes the brightness of the whole LED display screen to decline. The different brightness attenuation range of red, blue and green LED leads to the color inconsistency of LED display screen, that is, the phenomenon of display screen mosaic. A high-quality LED display can control the brightness attenuation and adjust its brightness.
3. Brightness
The brightness of LED display is the key factor to determine the brightness of the display. The higher the brightness of LED, the greater the residual power of current, which is beneficial to save power consumption and maintain the stability of LED. Each angle of LED is different. If the chip has been set, the smaller the angle is, the brighter the LED brightness is. If the viewing angle of the display is small, 100 degree LED should be selected to ensure enough viewing angle of the LED display. For LED displays with different point spacing and without sight distance, the brightness, angle and price should be considered to find a balance.
4. Perspective
The angle of LED lamp bead determines the angle of view of LED display. At present, most of the outdoor LED displays use elliptical patch LED beads with horizontal viewing angle of 120 degrees and vertical viewing angle of 70 degrees, while the indoor LED displays use patch LED beads with vertical viewing angle of 120 degrees. For example, the LED display screen on the highway selects the round led with 30 degree viewing angle. The high-rise LED display requires a higher vertical angle of view, large angle of view reduces brightness. So the choice of perspective depends on the specific use.
5. Inefficiency
Full color LED display is composed of tens of thousands or hundreds of thousands of red, green and blue LED pixels. Any color LED failure will lead to the overall visual effect of LED display.
6. Consistency
Full color LED display screen is composed of numerous red, blue and green LED pixels. The brightness and wavelength of each color of LED play a decisive role in the brightness, white balance consistency and brightness consistency of LED display. LED has angle, so the full-color LED display also has angle directivity, that is, when viewed from different angles, its brightness will increase or decrease. The angle consistency of red, green and blue LEDs will seriously affect the white balance consistency of different angles, affect the video color fidelity of LED display, and achieve the brightness change matching consistency of red, green and blue LEDs at different angles, The scientific design of packaging lens design and raw material selection depends on the technical level of suppliers. When the angle consistency of LED is not good, the white balance effect of different angles of the whole LED display is not optimistic.
7. Life span
The average life of LED display screen is 100000 hours. As long as the quality of LED device is good, the working current is appropriate, the heat dissipation design is reasonable, and the production process of LED display screen is rigorous, LED device is one of the most durable devices in LED display screen. The price of LED devices accounts for 70% of the price of LED display screen, so the quality of LED display screen can be determined by LED devices.
8. Dimensions
The size of the LED device is also related to important, it directly affects the pixel distance of the LED display screen, that is, the resolution. Generally, 5mm oval lamp is used for outdoor display above p16, and 3mm oval lamp is used for outdoor display of p12.5, p12 and P10. With the same segment spacing, the display area can be increased and the sense of particle can be reduced with the increase of LED device size.
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