The general appearance of the full-color LED display is composed of many RGB three-color light-emitting diodes, each pixel combination has RGB diodes, and each group of pixel lights is turned on and off to display a full-color picture of different colors.
1）、Failure Rate
Since the LED full-color display is composed of tens of thousands or even hundreds of thousands of pixels composed of three red, green, and blue LED lamp beads, the failure of any color LED lamp beads will affect the overall visual effect of the display screen.
Generally speaking, according to industry experience, the failure rate between the start of assembly of the LED Display and the 72-hour aging before shipment should be no more than 1/10,000 (referring to the failure caused by the LED device itself).
2）、Anti Static Ability
LED lamp beads are semiconductor devices, which are sensitive to static electricity and can easily cause static failure.
Therefore, the Antichrist ability is very important to the life of the LED Display.
Then the failure voltage of the human body electrostatic mode test of LED lamp beads should not be lower than 2000V.
3）、Attenuation Characteristics
The red, green, and blue LED lamp beads all have the characteristics of brightness attenuation as the working time increases.
Therefore, the quality of LED chips, the quality of auxiliary materials and the level of packaging technology determine the attenuation speed of LED lamp beads.
Generally speaking, after 1000 hours, 20 Am normal temperature lighting test, the attenuation of red LED lamp beads should be less than 10%, and the attenuation of blue and green LED lamp beads should be less than 15%.
So the consistency of red, green and blue attenuation The white balance of the full-color LED Display will have a great impact in the future, which will affect the display fidelity of the LED Display.
4）、Brightness
The brightness of LED lamp beads is an important determinant of the brightness of the entire screen of the LED Display.
The higher the brightness of the LED lamp beads, the more stable the LED lamp beads are beneficial. LED lamp beads have different angle values.
When the brightness of the chip is fixed, the smaller the angle, the brighter the LED lamp beads, but the viewing angle of the LED Display screen is smaller.
Generally, LED lamp beads of 100 degrees -110 degrees should be selected to ensure sufficient viewing angle of the LED Display.
For LED Displays with different dot pitches and different viewing distances, a balance should be found in brightness, angle and price.
5）、Consistency
The full-color LED Display is composed of countless red, green and blue LED lamp beads.
The brightness and wavelength consistency of each color LED lamp bead determines the brightness consistency and white balance of the entire LED Display.
Consistency and color consistency. Generally speaking , LED Display manufacturers require device suppliers to provide LED lamp beads with a wavelength range of 5nm and a brightness range of 1:1.3.
These indicators can be achieved by the device supplier through a spectroscopy machine. Voltage consistency is generally not required.
Since the LED lamp beads are angular, the full-color LED Display also has angular bidirectional, that is, when viewed from different angles, its brightness will increase or decrease.
In this way, the consistency of the angles of the LED lamp beads of a certain color of red, green and blue will seriously affect the consistency of the white balance of different angles, and directly affect the color fidelity of the LED Display screen.
To achieve the matching consistency of the brightness changes of the red, green, and blue LED lamp beads at different angles, it is necessary to strictly carry out scientific design in the package lens design and the selection of raw materials.
So this must be the technical level of the package supplier and The advanced nature of production testing equipment.
No matter how good the white balance of the LED screen is, if the angles of the LED lamp beads are not consistent, the white balance effect of the whole screen at different angles will be bad.
