How to solve the problem of LED display black screen

How to solve the problem of LED display black screen

In control system used in the process, we occasionally meet the LED display, the phenomenon of the black screen.The same kind of phenomenon may be caused by different reasons, even display blackening process will vary due to different operation or due to the different environment.Such as it may be a moment of electricity is black, may also be black in the loading process, also can be in after sending black and so on.You may refer to encounter this kind of phenomenon, please note the following aspects to judge "failure":

1.   Please make sure all hardware, including control system, is all right to electricity.(+ 5 v, don't pick up the, wrong)

2.   Check and double-check the serial port of the used to connect to the controller for loose or falls off phenomenon.(if the black in the loading process, probably because the reason is caused, namely in the process of communication was interrupted because of loose communication line, so the screen black. Don't think the screen body didn't move, line can not be loose, please to check, it is important for you want to quickly solve the problem.)

3.   Check and confirm the connection of LED display screen and the distribution of the HUB board connected to the master card is close connections, whether against

4.    Please check and confirm the connection between EQ control card and distribution HUB board 50 core wire for loose or plugged into the phenomenon

5.   If you display interface definition and the HUB board provided does not match will appear black screen phenomenon, please check if there's any loose for your jumper again, open circuit or short circuit phenomenon. If you think that has put the ABCD signals such as one-to-one correspondence, please check the OE signal is connected correctly.(it is strongly recommended that the use and display interface definition matching HUB distribution board)

LED Display VS LCD Splicing Screen

LED Display VS LCD Splicing Screen

With the enlargement of the LED display application range and infiltration, the application of LED electronic display screen and LCD splicing is becoming more and more fierce competition.Today both can be used in some occasions, so how to choose? And what is the difference between both and advantage?

LED display is also called electronic display, is made up of LED dot matrix and LEDpc panel, with red, blue, white, bright green LED lights to display text, images, animation, video, the content of the display.It adopts low voltage scanning drive, has: less consumption, long service life, low cost, high brightness, low malfunction, large Angle of view, the visual distance, etc.It can display the change of text, graphics, images, digital, video;Not only can be used in indoor environment also can be used in outdoor environment, with a LCD screen, projector, TV wall incomparable advantages, is widely used in railway stations, docks, airports, hotels, Banks, securities market, construction market, tax, shopping malls, hospitals, financial, industrial and commercial, post and telecommunications, sports, advertising, industrial enterprises, transportation, education system, auction houses and other public places, industrial enterprise management.

LED display is widely attention and got rapid development, with it itself has the advantages of the inseparable.It features: high brightness, miniaturization, long service life, low work voltage, low consumption, stable performance and impact resistance.LED display screen colorful, stereo sense is strong, static, such as oil paintings, such as movies, LED development prospect is very broad, is toward the higher brightness, higher resistance to climate, higher luminous density, higher luminescence uniformity, reliability, full color direction.

But the LCD splicing screen display unit USES stitching way, by joining together control software system, to realize the large screen display a splicing screen.The common way of joining together with 5.3 MM 55 inch ultra narrow side of the LCD splicing, 6.7 MM 46 inch ultra narrow side of the LCD splicing screen, 47 inch LCD splicing, 60 inch LCD splicing wall and 40 inch LCD splicing system narrow side.

Then the LED display screen and LCD splicing, compared to just who is the true king of the screen, concrete analysis from the following several aspects we can be clear at a glance.1. The service life of the LED longer than the life of the LCD.2. Refresh rate LED the refresh rate is higher than LCD, rapid response speed.3. In terms of energy consumption of the LED is much lower than LCD, so use LED environmental protection better.4. Brightness: LED color is more pure than, have a wide color gamut, brightness is higher, also can increase the Angle of screen.5. Viewing distance: LCD for a closer look at, but at the moment the LED pixel pitch has to be 2 mm, a closer look at also is not a problem.

If you have interest of led screen, welcome to contact me

LED advertising screen phenomenon of water ripple

LEDadvertising screen phenomenon of water ripple

In daily life, when we see beautiful pictures on TV, often pick up the phone to record down, and at this point, the photo flash tend to appear on the water ripples and scan lines. In can also bring gorgeous pictures of LED advertising screen before the photos, also can appear ripples and scan lines, there are some customers doubt about the quality of the LED advertising screen. Below small make up detailed analysis to the customer in the heart of doubt, the picture of water ripple and scan lines are not LED advertising screen caused by quality problems, but because when you take a photo in mobile phone, camera Angle and focal length.

First. Concept of water ripple

"Water ripple" also called "Moore lines," Moore grain is a kind of expression of the principle of beat. Mathematically speaking, the superposition of the continuous sine wave frequency close to two synthetic signal amplitude will change according to the difference between the two frequencies.

Second: appearance of MOORE LINES

Two slightly different spatial frequency stripe, they left black line position, due to different interval with, to the right gradually refreshed line can't overlap.The results of the two overlapping stripes, on the left because of the black line overlap, so I can see the white line.And right dislocation, white line on the black line, overlapping the outcome become all black.Have the change of the white line and all black, comprise the mole.

Third: appearance of led advertising screen moore lines

If LED advertising screen pixel distribution density between the camera can distinguish between the case, then will can decipher the part identification results, but because of LED advertising screen can't identify the ash terrace zone, a combination of both will form the regularity of the grain, response is periodic ripples on the vision.

Forth: how to delete Moore Lines

1, change the camera position. By around or move up and down, can reduce the ripple Moore.

2, change focus. Hd LED advertising screen due to the focus of the image clearly and height details may cause Moore corrugated production, slightly adjust the camera focus to change resolution, and thus help eliminate Moore.

3, change the camera Angle. Moore corrugated, due to camera fixed Angle will be slightly adjust the Angle of the camera, is a good way to slow Moore lines.

4, use mirror filter installed directly in front of the camera lens, make its exposure conditions satisfy the spatial frequency, high spatial frequency part thoroughly filtered image, opportunities for decreasing the occurrence of Moore's grain, but it will also be synchronous reduce the sharpness of the image.

5, change the lens focal length. Can use different lenses or adjust the focal length, to change or remove Moore.

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