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——Assembly precision: it shows the indicator value of display screen packaging technology. The smaller the point spacing is, the clearer the screen is, the higher the assembly precision is, and the better the display effect of the screen is. The "grid" effect of the traditional TV wall represented by DLP and LCD after assembly cannot be eliminated; the assembly error in the conventional LED display products can be compared with differences after adjustment; however, in the products with small spacing, in addition to the improvement of the processing technology of each link, it is often required to separate the structural adjustment and electrical correction to deal with the assembly accuracy.
——Maximum brightness non average: the indicator parameter of the display effect of the reverberation display under the maximum brightness state. The lower the unevenness, the better the effect of the image. The traditional TV wall represented by DLP and LCD, due to the different attenuation of each display unit, after long-term application, there will be "color difference", "light dark" and other phenomena between the display units of TV wall;
——Low brightness non average; the indicator parameters of the display effect of the reverberation display screen in the low brightness state are the important performance indicators of the indoor small spacing led. The indoor small spacing LED display screen often needs to stop the image playback in the low brightness state. Compared with the maximum brightness non average, the low brightness non average can better illustrate the quality of the indoor small spacing LED display screen.
——The black screen is non-average; because the indoor small space LED display screen turns off the LED light bead when displaying the black screen, relying on the display screen base to stop the reflection display, which shows the reflection average of the display screen base data and the manufacturing process degree of the display screen.
——Pixel failure rate: for the indoor small space LED display, the relevant indicators regulated by the current industry specifications can not reflect the technical requirements of indoor small space LED display. According to the current industry level, improve the pixel failure rate limit request, and better and effective evaluation can be made for the indoor small space LED display showing "dead" points, caterpillars and other phenomena.
——Low light, high gray and high brush: the conventional LED driving IC is adopted, and the glint problem of small spacing LED display screen will appear under low brightness. The introduction of low light, high gray and high brush driving IC can effectively deal with the glint problem under low brightness; in indoor small spacing LED display products, the limit value of the term stop index can be completely understood. Low light, high gray and high brush are special technical requirements for indoor small space LED display.
——Working noise: the indoor small space LED display screen is mostly used in places such as hospitals, studios, meeting rooms, command centers, etc. it is required to request the screen to stop noise, and put forward the request and experimental method in accordance with csmpte 002-2016 technical request and measurement method for LED display screen used in studios.
——Electromagnetic compatibility: the indoor small space LED display screen is mostly used in places such as hospitals, studios, meeting rooms, command centers, etc., which should prevent interference to other equipment in the application place, and also should be strong in anti-interference ability of other equipment in the application place, improve the requirements of electromagnetic compatibility index, and promote the industry to consider reducing the signal connection point and other technologies in the research and development process.