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      Shenzhen Lhjloong Technology Co., Ltd. LED Display » News » Industry News » How to identify the LED screen is good or bad

      How to identify the LED screen is good or bad


      From:web  Author:admin  Hits:1413  Date:2016-01-28  【Big Middle Small

      1: Flatness: LED display surface roughness should be within + 1mm, in order to ensure that the display image does not distort, local convex or concave into the visual angle of the screen will lead to the emergence of dead angle. LED display manufacturers to introduce the flatness of the production process is mainly determined by the production process.

      2: brightness and visual angle: indoor full color brightness to the 800 - 2000 CD / m2, outdoor full color brightness to in the normal work of the 5000 - 7500cd/m2. In order to ensure that the display, otherwise it will because the brightness is too low or too high to see not clear as shown in the image. The size of the brightness is mainly determined by the size of the LED tube core. The size of the visual angle directly determines the number of the audience, therefore, the larger the angle, the better. And its size is mainly determined by the tube core package.

      3: white balance: white balance is the most important indicator of the display, color science popular green, blue three primary colors of the proportion of 1:4.6:0.16 will show out of pure white, if the proportion of the actual deviation will appear the deviation of the white balance, to pay attention to whether the white bluish and yellowish green. Car LED display manufacturers to introduce white balance is good or bad there is a display control system to decide, the core of the color of the reduction of the impact.

      4: there is no color color: color is that there is obvious difference between adjacent module, the transition of color to module for the unit, causing color phenomenon is mainly caused by the control system is poor, the gray level is not high, scanning frequency lower.

      5: the reduction of color: the reduction of color is the color of the display screen to restore the color, both the color of the display and the source of color to maintain a high degree of consistency, so as to ensure the authenticity of the image.

      6: mosaic, dead phenomenon: mosaic is that appears on the display module of uneven color is the effect, often bright or black four square, both module necrosis phenomenon, the main reason for the display of the connector quality does not pass. The dead point refers to the single point screen appears often bright or often black, the number of dead is mainly composed of a pipe core is determined.

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