Part of the LED display is not on. What's the reason?
Author:Liu Ziyu Time:2021-09-26 13:32 Browse(196)
The possible reasons are as follows:
The possible reasons are as follows:

Part of the LED display is not on. What's the reason?

1. The power supply is damaged, and the power supply can't provide power support, so that part can't light up
2. The signal line is damaged, and the signal from the previous board cannot be transmitted to the next board, so it is not displayed
3. The control card is set incorrectly, the number of points set by the control card does not reach the actual number, and the signal beyond the limit is not displayed<

LED display is a kind of flat panel display.
it is composed of a small LED module panel, which is used to display text, image, video and other information Video signals and other information devices.






extended information

the luminous color and luminous efficiency of LED are related to the material and process of making LED.
at the beginning, the lamp ball is all blue light, followed by phosphor, which can adjust different light colors according to the different needs of users, and the widely used ones are red, green, blue, red, red, red, red, red, red, red, red, red, red, red, red, red, green, red, red, blue, red, red, red, red, red, red The working voltage of LED is low (only 1.2 ~ 4.0V).
it can emit light actively and has a certain brightness. The brightness can be adjusted by voltage (or current), and it is shock resistant, vibration resistant and has a long service life (100000 hours), There is no other display mode that can match the LED display mode.


the LED light-emitting materials used in the display screen have the following forms:
1. The LED light-emitting lamp (or single lamp) is generally composed of a single LED chip.
reflective cup, metal anode and metal cathode, One or more single lamps (of different colors) can be used to form a basic pixel.
the color of the lamp is different from the color of the lampBecause of its high brightness, it is mostly used for outdoor display.

2. LED lattice module is composed of several chips to form a luminous matrix.
it is encapsulated in a plastic shell with epoxy resin.
it is suitable for row and column scanning drive.
it is easy to form a high-density display, and is mostly used for indoor display.

3 SMD LED (SMD LED) is the package of LED light-emitting lamp in the form of soldering.
it can be used for indoor full-color display, and can realize single point maintenance, Effectively overcome the mosaic phenomenon.

reference: Baidu Encyclopedia LED display has many common problems.
in daily use, users must understand the solutions to the common problems of LED display.
Shenzhen LED display summarizes the common problems and solutions of LED display for the majority of users.

common problems of LED display 1 The solution of unable to load may be caused by the following reasons.
please compare with your operation according to the listed items:
A. ensure that the control system hardware has been correctly powered on.
(+ 5V)
B. check and confirm that the serial line used to connect the controller is straight line.
not cross line.

C Check and make sure that the serial port connecting line is intact and there is no looseness or falling off at both ends.

D. select the correct product model, correct transmission mode, correct serial port number according to the LED display control software and your own control card The address bit and baud rate on the hardware of the control system can be set correctly according to the dial switch diagram provided in the software.
the system has the following advantages: 1
E. check whether the jumper cap is loose or falling off; If the jumper cap is not loose.
please make sure that the direction of the jumper cap is correct.

F. if it still fails to load after the above inspection and correction.
please measure it with a multimeter, Whether the serial port of the connected computer or control system hardware is damaged.
to confirm whether it should be returned to the computer manufacturer or the control system hardware for testing.

LED display FAQ 2 The system prompts "please connect the LED display controller" what's the matter
reason: many customers download the "LED display controller" directly from the "Download Center" on the company's website.
after 20 minutes of installation, the prompt "please connect the LED display controller" will appear, This is because the system did not detect the hardware of the control system during the test time.

solution: many customers directly download the "LED display control system" from the "Download Center" on the company's website.
after 20 minutes of operation, the prompt of "please connect the LED display controller" will appear, This is because the system did not detect the hardware of the control system during the test time.

common problems of LED display screen 3. What is the reason for the black screen of LED display screen
A. please ensure that all hardware including the control system has been correctly powered on.
(+ 5V.
do not connect reversely or wrongly)
B Check and repeatedly confirm whether the serial cable used to connect the controller is loose or falling off.
(if it turns black during loading.
if it turns black during loading.)Most likely, it is caused by this reason, that is, the screen is black due to the loose communication line in the communication process.
do not think that the display screen is not moving.
the line can not be loose, please check, which is very important for you to quickly solve the problem.
)
C. check and confirm whether the LED display and the hub distribution board connected with the main control card are tightly connected The above three cases are the common problems and solutions in the process of using LED display.
it is suggested that users should also maintain the LED display regularly and properly.
(source: www.informed. CN).
the LED display should not be inserted reversely
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