Why do bright lines appear on large outdoor LED displays?

Publisher: Supplier of LED Display Time: 2022-07-28 19:20 Views: 205

As LED displays become more and more common, LED displays can be seen everywhere in the streets and alleys to play text, pictures, videos and other information. However, in the process of use, we will find that the LED outdoor large-scale display always inevitably has bright lines in the process of use. What is the reason? In order to make its playback more perfect, how to solve the problem of bright lines on the LED display? Next, the editor of Liancheng will introduce you one by one!

1. Reasons for "bright lines" during the use of outdoor LED displays

(1)The quality of the product is not up to the mark. When buying, don't be greedy for cheap to buy products with low price and poor quality. All LED displays produced by Lianchengfa will not have these problems. If you need to buy LED displays, you can go to Lianchengfa LED display manufacturers to purchase.

(2)The voltage is unstable, causing leakage.

(3)Improper operation method will affect the effect of the display screen due to human operation error.


2. How to check and eliminate the "bright line" fault during the use of the LED outdoor large screen?

(1)Determine whether the power supply is damaged and whether it can be used normally. Because one power supply controls several cell boards at the same time. You can measure whether the output voltage is between 4.9~5.5v. If it is not within this range, it is likely that the power supply is broken.

(2)Check whether the control card is in normal use. Turn on the power first and see if the control card indicator light is on; if not, check if there is a 5V voltage supply to see if the outdoor LED electronic screen can display the content. If it can display the content, it means that the control card display content function is good Then use the control card software to find the control card, if it can be found, it means that the function of sending the content of the control card is good; It is very likely that there is a problem with the card. As long as these two functions are good, the control card is good, otherwise the control card should be replaced.

(3)Check whether the cell board is good. The signals of the LED display are all input from one board to another board. So if there is a problem with one board, it will affect the board behind. Therefore, it is necessary to check whether the unit boards are normal one by one.

3. What is the reason why the LED screen is completely black?

In the application process of the control system, we occasionally encounter the phenomenon that the LED screen is completely black. The same phenomenon may be due to various reasons, and the process of screen blackening also varies depending on the operation and environment. For example, the electricity may be black at the moment, or it may be black in the middle, and it may be black after the transmission.

(1)Please ensure that all hardware including the control system is properly powered on. (+5V, not the other way around, not the other way around).

(2)Check if the serial cable connecting the controller is loose or disconnected. (If it goes black during the loading process, there is a high possibility of interruption due to the loose communication line during the communication process, so the screen goes black, the screen body does not move, and the line cannot be loose, please check it by hand. As described in the plot, for the conceptual design The volume of the volume in the analysis was performed.

(3)Check whether the LED screen and the HUB distribution board connected to the main control card are tightly connected, and confirm whether they are inserted.

4. The reason why the whole screen is not bright or dark on the unit board

(1)Visually check whether the power supply cable, the 26P line between the unit boards and the power module indicator light are normal.

(2)Use a multimeter to measure whether the unit board has normal voltage, and measure whether the voltage output of the power module is normal, otherwise it is judged that the power module is broken.

(3)Measure the low voltage of the power supply module, and adjust the trimming (the trimming of the power supply module close to the indicator light) to make the voltage reach the standard.

After finding out the problem by yourself, repair the damage. If you can't repair it yourself, you can contact the manufacturer or send it to the manufacturer for repair. If the damaged part is serious, the maintenance technician can go to the site to repair to ensure that the led display can be used normally.

The above is the reason why there are bright lines on the LED outdoor large-scale display screen sorted out by the editor of LCF, and the solutions are welcome. Lianchengfa is a world-leading provider of LED display applications and solutions, as well as a national-level specialized, special, and new little giant enterprise. The main business covers "smart city", "cultural tourism business performance", "commercial display project", "content technology" four major sections, with the world's leading automated production equipment and modern post-doctoral research laboratory and perfect sales and services team. Friends who want to buy LED display can also contact us, LCF LED display manufacturer, a big country brand, trustworthy!