The reason why led display can display colorful patterns is because it is composed of many led lights. As led lamp beads are the most expensive and most used components for display screens, they have a decisive effect on the quality of led display screens.
Why led led beads are the most critical components in the led display for the following three reasons:
1, led lamp beads is the key device used in the display machine the largest number, according to the size of the screen body, sometimes per square meter will use thousands or even tens of thousands of led lights.
2. The proportion of led lamp beads in the overall manufacturing cost of the display screen is the largest, accounting for about 30%-80%.
3, led lamp beads The most important point is the ability to determine the main body of the entire screen optical display performance, its quality will directly affect the audience's evaluation of the display screen.
The following are the key components of deciphering the led display - What are the effects of the led bead on the display?
First, brightness
The brightness of the led lamp is an important determinant of the brightness of the display. The higher its brightness, the greater the amount of current used, which is good for saving power and maintaining display stability. And it also has different angle values, in the case of the same brightness of the chip, the smaller the angle, the brighter the led lamp beads, but the smaller the viewing angle of the display screen. For display screens with different dot pitches and different line of sight, a balance should be found in brightness, angle, and price.
Second, the perspective
Because the view of the led lamp bead will determine the viewing angle of the led display. Especially in some high-rise buildings, the vertical viewing angle is higher. The viewing angle and brightness will not be balanced, and the large viewing angle will inevitably reduce the brightness. Therefore, the selection of the viewing angle needs to be determined according to the specific purpose.
Third, the LED lamp beads failure rate and attenuation characteristics
Since the display screen is composed of tens or even hundreds of thousands of red, green, and blue LED pixels, when the failure of any color led will affect the overall visual effect of the display, so we began to assembly in the led display to the aging The LED failure rate is controlled to one ten-thousandth before shipping for 72 hours.
We often find that the led display will have a drop in brightness and display color inconsistency after a long time of work, and cause the entire display screen to appear Huaping phenomenon, which is mainly due to the brightness attenuation characteristics of led. In addition to its own attenuation factors, the attenuation characteristics are related to the current used, the design of the PCB board heat sink, and the ambient temperature of the display panel.
Fourth, size and consistency
The size of the led component will affect the pixel pitch of the led display, ie the resolution. If the dot pitch is constant, the size of the LED device increases, the display area can be increased, and the graininess can be reduced. However, since the black area is reduced, the contrast is reduced. Conversely, a decrease in the size of the LED will reduce the display area and increase the graininess, but the black area will increase and the contrast will increase.
The display is composed of numerous red, green, and blue LEDs. The consistency of the brightness and wavelength of each LED's color will determine the brightness uniformity, white balance consistency, and color consistency of the entire display.
V. Life
The life of the led lamp beads is theoretically 100,000 hours, which is much longer than the working life of other components of the led display screen. Therefore, as long as the quality of the LED device is ensured, the proper operating current, and a reasonable PCB thermal design, it will be the entire display screen. One of the most durable parts.
China is a major producer of LED devices, but also a gathering place for LED display production. As led devices can determine the quality of the led display screen, so when we produce led display, we should start from the raw material led lamp beads, only the quality of this display can be guaranteed.
Shenzhen GEME electronics Co,.Ltd , https://www.gemesz.com