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  • Wuxi Kinglux Glass Lens Co.Ltd
  • ADD:No.286,Changjiang North Rd,New Dist,Wuxi,JS prov,China
  • Tel: 86-510-66759801
  • Fax: 86-510-84602998
  • Mobile phone: 86-18168862789
  • E-mail: ledglasslens@163.com
  • Contact person: Huimin Zhang
  • 9 tips for distinguishing the quality of LED displays
    Dec 03, 2018

    Lead: The surface flatness of the display should be within ±1mm to ensure that the displayed image is not distorted. Local bumps or recesses may cause the viewing angle of the display to appear dead angle.


      1. Flatness


    The surface flatness of the display should be within ±1mm to ensure that the displayed image is not distorted. Local bumps or recesses may cause a blind angle in the viewing angle of the display. Between the box and the box, the gap between the module and the module should be within 1mm. If the gap is too large, the boundary of the display will be obvious and the vision will be uncoordinated. The quality of the flatness is mainly determined by the production process.


      2. Brightness and viewing angle


    The brightness of the indoor full-color screen should be above 800cd/m2, and the brightness of the outdoor full-color screen should be above 5000cd/m2 to ensure the normal operation of the display. Otherwise, the displayed image will not be seen because the brightness is too low. The brightness of the display is not as bright as possible and should match the brightness of the LED package. Increasing the current and increasing the brightness will cause the LED to decay too fast and the display life will drop rapidly. The manufacturer may be required to provide a parameter report to confirm. The brightness of the screen is mainly determined by the quality of the LED die.


    The viewing angle refers to the maximum angle between the two screens that you can see from the screen. The size of the viewing angle directly determines the number of display audiences, so the bigger the better. The viewing angle should be above 150 degrees. The size of the viewing angle is primarily determined by the way the die is packaged.


    3. White balance effect


    The white balance effect is one of the most important indicators of the display. In color theory, when the ratio of red, green and blue primary colors is 1:4.6:0.16, pure white will be displayed. If there is a slight deviation in the actual ratio, white balance deviation will occur. Generally, it should be noted whether white is blue. Color, yellowish green. In monochrome, the difference in brightness and wavelength between LEDs is as small as possible. Standing on the side of the screen to observe no color or color cast, the consistency is better. The quality of the white balance is mainly determined by the brightness ratio of the LED die and the control system of the display. The die also has an effect on the color reproduction.


    4. Color reduction


    The reproducibility of color refers to the reducibility of the display, and the color displayed on the display should be consistent with the color of the source to ensure the realism of the image.


    5. Whether there is mosaic or dead point


    Mosaic refers to the small four-square block that appears on the display or is always black. The module is necrotic. The main reason is that the quality of the IC or connector used in the display is not good. Dead point refers to a single point on the display that is always bright or often black. The number of dead points is mainly determined by the quality of the die and whether the manufacturer's anti-static measures are perfect.


    6. With or without color blocks


    The color block refers to the obvious color difference between adjacent modules, and the color transition is in units of modules. The phenomenon of color block is mainly caused by poor control system, low gray level and low scanning frequency.


    7. Display stability


    Stability refers to the reliable quality of the LED display in the aging stage after it is finished. It can be determined by the manufacturer to aging records to determine the number of conditions that occur during the aging of the screen.


      8. safety


    The LED display is composed of multiple cabinets, each of which must be protected by external grounding. The grounding resistance should be less than 0.1 ohm. And can withstand high pressure, 1500V 1min does not breakdown. Warning signs and slogans are required at the high voltage input and at the high voltage wiring of the power supply.


      9. Packing and shipping


    The LED display is a valuable cargo and weighs a lot. The packaging method used by the manufacturer is very important. Generally, it is packaged in a single box. The sides of the box must have a protective material to cushion the space. The internal space of the box is not large during transportation. The outer box must be clearly marked.