The quality of the LED display is mainly judged from the following aspects:
1. Brightness and viewing angle
The brightness of the indoor full-color screen must be above 800cd / m2, and the brightness of the outdoor full-color screen must be above 1500cd / m2 to ensure the normal operation of the display screen, otherwise the displayed image will not be clear because the brightness is too low. The brightness is mainly determined by the quality of the LED die.
The size of the viewing angle directly determines the number of display screen audiences, so the larger the better. The size of the viewing angle is mainly determined by the packaging method of the die.
2. Flatness
The surface flatness of the display screen should be within ± 1mm ​​to ensure that the displayed image is not distorted, and local protrusions or recesses will cause the viewing angle of the display screen to appear dead angle. The quality of the flatness is mainly determined by the production process.
3. With or without color blocks
Color block refers to the obvious color difference between adjacent modules. The color transition is in units of modules. The color block phenomenon is mainly caused by poor control system, low gray level and low scanning frequency.
4. White balance effect
The white balance effect is one of the most important indicators of the display. Chromatically, when the ratio of the three primary colors of red, green and blue is 1: 4.6: 0.16, it will show pure white. If there is a slight deviation in the actual ratio, there will be a deviation of white balance. It is generally necessary to pay attention to whether the white is blue or yellow. Green phenomenon. The quality of the white balance is mainly determined by the control system of the display screen, and the die also has an effect on the color reproduction.
5. Whether there is mosaic or dead spots
Mosaic refers to the small squares that are always bright or often black appearing on the display screen, which is the phenomenon of module necrosis. The main reason is that the quality of the connectors used in the display screen is not enough.
6. Color reproducibility
The color reproducibility refers to the color reproducibility of the display screen, that is, the color displayed on the display screen must be highly consistent with the color of the playback source, so as to ensure the authenticity of the image.
Panasonic understands manufacturers` challenges in adapting to the demands of increasingly wider market segments. So Panasonic designed a common platform that incorporates jumper wire and radial solutions in both the high-density and high-speed arenas, and an expanded axial solution with built-in jumper wire flexibility.
Radial Insertion Machine,Universal Radial Insertion Machine,Panasonic Radial Insertion Machine,Panasonic Insertion Machine
Shenzhen Keith Electronic Equipment Co., Ltd. , https://www.aismtks.com