How Can the LED Display Screen on the Stage Tell Whether It Is Good Or Bad

For a "layman" how to distinguish the quality of stage LED display screen, he does not fully understand the stage LED display screen. In general, it is all justified by the salesperson. Sometimes it is difficult to convince the user. In the next few days, there are several simple methods to identify the quality of full-color display screen. I hope they can be helpful when you buy full-color display screen.The quality of a stage LED display can be judged from the following aspects:1. Flatness of stage LED display screen

How Can the LED Display Screen on the Stage Tell Whether It Is Good Or Bad 1

The surface flatness of the display screen shall be within 1mm to ensure that the displayed image is not distorted. Local bulges or recesses will lead to dead corners in the visual angle of the display screen. The gap between the box and the box, and between the module and the module shall be within 1mm. If the gap is too large, it will lead to obvious boundary of the display screen and visual disharmony. The flatness is mainly determined by the production process.2. Brightness and visual angle of stage LED display

The brightness of the indoor full-color screen should be more than 800cd / m2, and the brightness of the outdoor full-color screen should be more than 5000cd / m2 to ensure the normal operation of the display screen, otherwise the displayed image will not be seen clearly because the brightness is too low. The brightness of the display screen is not the brighter the better. It should match the brightness of the LED package. Blindly increasing the current and increasing the brightness will cause the led to decrease too fast and the service life of the display screen to decline rapidly. The manufacturer can be asked to provide parameter report for confirmation. The brightness of the screen is mainly determined by the quality of the LED tube core.

Visual angle refers to the maximum included angle of the whole screen content that you can see from the two measurements of the screen. The size of the viewing angle directly determines the audience of the display screen, so the larger the better. The visual angle should be more than 150 degrees. The visual angle is mainly determined by the packaging mode of the die.Several tips to teach "laymen" how to distinguish the quality of stage LED display screen3. White balance effect of stage LED display

White balance effect is one of the most important indicators of display screen. In terms of chromatics, pure white will be displayed only when the ratio of red, green and blue primary colors is 1:4.6:0.16. If there is a deviation in the actual ratio, there will be a deviation in the white balance. Generally, pay attention to whether white is blue or yellow green. In monochrome, the smaller the brightness difference and wavelength difference between LEDs, the better. Standing on the side of the screen, there is no color difference or color deviation, and the consistency is better. The white balance is mainly determined by the brightness wavelength ratio of LED die and the control system of display screen. The die also has an impact on the color restoration.

How Can the LED Display Screen on the Stage Tell Whether It Is Good Or Bad 2

4. Color restoration of stage LED displayColor reduction refers to the color reduction of the display screen, that is, the color displayed on the display screen should be highly consistent with the color of the playback source, so as to ensure the authenticity of the image.5 stage LED display screen, dead center phenomenon

Mosaic refers to the small four squares that are often bright or black on the display screen, which is the phenomenon of module necrosis. The main reason is that the quality of IC or connector used in the display screen is not up to standard. Dead point refers to a single point that is always bright or dark on the display screen. The number of dead points is mainly determined by the quality of the tube core and whether the anti-static measures of the manufacturer are perfect.6. Is there any color block on the stage LED displayColor block refers to the obvious color difference between adjacent modules. The color transition is based on the module. The color block phenomenon is mainly caused by poor control system, low gray level and low scanning frequency.

7. Stability of stage LED displayStability refers to the reliable quality of stage LED display screen in the aging stage after it is made into a finished product. The aging record can be obtained from the manufacturer to determine the condition of the screen during aging.8. Security of stage LED display screen

The stage LED display screen is composed of multiple boxes. Each box must be provided with external grounding protection, and the grounding resistance shall be less than 0. 1 euro. And it can withstand high voltage without breakdown at 1500V for 1min. Warning signs and slogans shall be provided at the high-voltage input terminal and the high-voltage wiring of the power supply.9. Packaging and transportation of stage LED display screenThe stage LED display screen belongs to valuable goods, which is very heavy. The packaging method used by the manufacturer is very important. Generally, the box is packed as a single box. There must be protective objects on all sides of the box for cushioning. The internal activity space of the box during transportation is small. The outer packing box must be clearly marked.

Source: Shenzhen Yunhai Photoelectric Technology Co., Ltd

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What Should I Do When the LED Display Screen Does Not Work? Is There Any Solution
When the LED display screen is installed or used, sometimes the display screen does not work. At this time, many people who do not know the principle may feel that the quality of LED display screen is not good and ask to replace the screen. In fact, the phenomenon that the display screen does not work has nothing to do with the quality of the screen. Let's talk about the handling method of LED display screen not working.The first case that the LED display screen does not work is that the display screen does not work and the green light of the sending card flashes (made into retractable type).The main reason for this situation is that the screen body has no power supply; The network cable is not connected properly; The receiving card has no power supply or the power supply voltage is too low; The sending card is broken; The signal transmission intermediate equipment is connected or faulty (e.g. function card, optical fiber transceiver). The sequence of troubleshooting methods to be adopted at this time is: check and confirm that the power supply of the screen is normal; Check and reconnect the network cable; Ensure that the DC output power supply of the power supply is 5-5.2v; Replace the sending card; Check the connection or replace the function card (optical transceiver).The second case that the LED display screen does not work is that the Maipu Guangcai display screen does not work and the green light of the sending card does not flash.The main reason for this problem is that the DVI or HDMI cable is not connected properly; The copy or expansion mode is not set in the graphics card control panel; The software chooses to turn off the power supply of the large screen; The sending card is not inserted in place or there is a problem with the sending card. At this time, the detection sequence of exclusion method is: check the DVI cable connector; Reset the copy mode; The software selects to turn on the large screen power supply; Reinsert the sending card or replace the sending card.The above are the main problems and detection methods of LED display screen inoperative. I hope it will help you.fqj
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