One. Color reducibility refers to the reducibility of the display screen to the color,
That is, the color displayed on the display should be highly consistent with that of the playback source,
To ensure the authenticity of the image.
2. The existence of color block refers to the obvious color difference between adjacent modules.
Color conversion is based on modules.
Color block phenomenon is mainly caused by poor control system, low gray level and low scanning frequency.
3. Mosaic and dead spot phenomenon mosaic refers to the four small squares that are always bright or often black on the display screen, that is, module necrosis.
The main reason is that the interface quality of the display screen is unqualified.
Dead point is a single point that is always on or always black on the LED display.
The number of dead points mainly depends on the quality of the core.
IV. flatness the surface flatness of LED display shall be within ± 1mm to ensure that the display image is not distorted,
Local bulge or depression will cause dead angle of view angle of display screen. The shape of the plate is mainly determined by the production process.
V. brightness and viewing angle: the brightness of indoor full-color screen shall be greater than 800cd / m2, and the brightness of outdoor full-color screen shall be greater than 7500cd / m2 to ensure the normal operation of display screen.
Otherwise, the displayed image may not be visible due to low brightness. The brightness mainly depends on the quality of LED core.
The size of the perspective directly determines the number of viewers on the screen, so the bigger the better.
The size of the viewing angle is mainly determined by the packing method of the tube core.
White balance effect white balance effect is one of the most important indicators of display screen.
In chromaticity, when the ratio of red, green and blue primary colors is 1:4.6:0.16, it shows pure white.
If there is a slight deviation in the actual proportion, there will be a white balance deviation.
Generally speaking, we should pay attention to whether white has blue bias and yellow green bias.
The quality of the white balance is mainly determined by the control system of the display screen, and the tube core also affects the color restoration.
Although the demand of LED electronic display screen is nearly saturated at present, with the development of new display screen products, as well as the breakthrough of new demand market and application environment, it will bring new opportunities to the domestic LED display screen market.
There will be challenges in organic encounters.
With the aggravation of industry competition, the LED display market will continue to grow in the future, but on the other hand, it will also increase the transformation or elimination of some small and medium led display manufacturers.