What is the reason for the black screen on the led screen?

double sided 2.56m x 1.28m P10 outdoor (1)1. All hardware including the inspection control system has been properly powered. (5V, do not reverse, wrong)

2. Check if the serial cable connected to the controller is loose or disconnected. (If the screen changes to black during the loading process, it is likely to be caused by this reason)

3. Check if the HUB distribution board connected to the main control card is connected tightly. You can not plug in the opposite direction.

Indoor Led display cannot be used in outdoor environments.

1, indoor Led display brightness is generally less than 2000CD/sqm; outdoor Led display brightness is greater than 4500CD/sqm.
2, indoor Led lamp do not have UV protection, use in sunlight will only shorten the life of LED. Indoor Led lamp are used at high temperatures to speed up the speed of decay.
3, indoor Led cabinets, modules, wires are designed and produced in accordance with indoor standards.cabinet front maintain

Shenzhen hia sheng specializes in producing LED display for 11 years.

Optokingdom engineers share SMD, 4in1, COB, GOB, and AOB processes.

SMD package: Single or multiple LED chips are soldered to a metal bracket with a plastic “cup” frame. Liquid epoxy resin or silicone gel is potted into the plastic frame, then baked at a high temperature, and then cut into individual surface mount packages.


4in1 package: There are four basic pixel structures in a package structure, which is essentially four “light beads” synthesized by 12 RGB–LED chips.

COB package: A bare chip is adhered to an interconnect substrate with a conductive or non-conductive paste, and then wire bonding is performed to realize electrical connection.GOB package: (Glue on board) GOB uses an advanced new transparent material to encapsulate the substrate and its LED package unit to form an effective protection.

AOB package: (Admixture On board) AOB is a process arranged in the production process of surface-mount LED display. After the SMT process is completed, a film of a polymer material is coated on the surface of the lamp board and protected by nano-coating.


Hia sheng specializes in the production of LED display manufacturers, to provide professional services for you!

Does the outdoor LED display need to be cleaned? Yes, use a soft brush to scrub.

After the outdoor LED display works for a certain period of time, there will be dust accumulation on the surface of the LED module to affect the display effect. Regular cleaning and maintenance of the display can prevent the LED display from being unclear during playback, mosaic phenomenon and color cast during black screen, and can extend its service life and improve display. Use a clean water and detergent liquid to scrub the surface of the LED display.


optokingdom lcd video wall

1. Use industrial-grade professional DID LCD splicing screen, designed for industrial monitoring and multimedia information display to achieve signal splicing display and achieve signal split display, windowing, superimposing, cross screen, zooming and other special displays.
2. Ultra-narrow border design, bilateral seam up to 3.5mm.
3. Support 7×24 hours, 365 days of continuous power-on, high reliability and stability, backlight life up to 60,000 hours.
4. The system can meet both analog signal access and digital HD signal access, and various types of signal input can achieve single-screen display, combined splicing display, and full-screen splicing display.
5. All signals are connected to LCD splicing screen through matrix to achieve signal switching and free combination and splicing.
6.All splicing units can display the same or different sources on a single screen.
7.The video signals can be connected to all kinds of storage devices to facilitate future access and access to the LCD splicing screen for real-time display.
8.The entire large screen display system includes splicing screen, various matrices and image splicing processor, which can be controlled and managed through Foretell large screen control softwar.

Optokingdom invites you to enjoy the 5th World Internet Conference

The 5th World Internet Conference was held in Wuzhen, Zhejiang, China from November 7th to 9th, 2018. About 1,500 guests from 76 countries and regions, representatives of international organizations, leading figures in Internet companies, and well-known experts and scholars gathered in Wuzhen to build a network of destiny together in the digital world of creating mutual trust and governance. The theme, on the development of cyberspace, showcases the achievements of information technology innovation, discusses ways of digital economic cooperation, and injects new impetus and new contributions to advance the global Internet governance governance process.

The conference released 15 leading Internet technologies for the world.





1.Apollo automatic driving open platform released.

2. Qualcomm’s world’s first fully integrated 5G new air interface millimeter wave and RF module below 6GHz released.

3. Azure Sphere-microcontroller-based IoT security solution released.

4. Amazon’s fully managed platform Amazon SageMaker released.

5. WeChat mini programs business model innovation.

6. Huawei Ascend 310 chip release.

7.Ant Financial Service’s self-controllable financial-grade commercial blockchain platform.

8.Beijing University cracks information islands interface efficient interoperability technology and Yanyun DaaS system.

9.360 security brain – distributed intelligent network security defense system.

10.Jingdong Intelligent Supply Chain Technology Service Platform.

11.Anmou Technology China’s new artificial intelligence platform.

12.Alibaba Cloud Computing supET Industrial Internet Platform.

13.Tsinghua University CPU hardware security dynamic monitoring and control technology.

14.Artificial intelligence open platform of Xiaomi Smart Home.

15.Tesla intelligent after-sales service.

The release of these technologies is inseparable from the speakers. LED display support. Optokingdom is the world’s largest supplier of LED displays, we provide the most complete and detailed solutions. Our website is:https://www.optokingdom.com/





Optokingdom shares the reason why outdoor advertising preferred LED display advertising?

Traditional outdoor advertising model (such as single-column advertising, light box advertising, bridge advertising, three-sided advertising, etc.) with the advancement of technological innovation, the traditional industry upgrade. In the past, the old advertising model no longer meets the needs of market users, and traditional outdoor advertising has caused visual fatigue. Outdoor advertisers have to follow the pace of technology, so there is an outdoor LED display advertising, then LED display advertising is better than traditional outdoor advertising in what aspects?

The traditional advertisement publishing information is not as convenient as the LED display information. Every time a traditional advertisement is published, the entire advertisement has to be redesigned and replaced, and labor costs are required, which is time consuming and labor intensive. LED display ads only need to be connected via computer cable or wireless communication (wifi, 3G, 4G), simple settings in the computer, you can use to publish advertising content, convenient and fast.

The traditional advertising form has limited content and cannot fully express the advertising content; while the LED display advertisement, the operator and the publisher can update the LED display advertising content at any time, only need to operate and control the computer, and the updating process is not restricted by other external conditions.

Traditional advertising can only be presented in the form of pictures, lacking creativity and making people forget. LED displays are often more appealing to the public in the form of intuitive, vivid, visual video and 3D effects. They are usually located in public places, transportation routes, plazas, commercial buildings, shopping centers, etc. It is wider than the traditional media audience and has a better communication effect.

Shenzhen Haisheng Optoelectronics has 10 years of experience in R&D, production and sales of LED displays. Our company’s advantages in outdoor products are PH10, PH8, PH6, PH5, PH4, PH3, etc. For more products, please visit our website.


HSTV engineers share How to do emergency protection after led screen is watered

With led screen widely used everywhere, people know the function and outstanding advertising effect of led screen, but not all people know how to solve when there is maintenance work. Here we talk about how to protect the led screen when it is watered.

1.dry the led screen by fans at the earliest time

2.turn on the led screen with below detail steps
1): set 10% full white balance, power on 8-12 hours
2): set 30% full white balance, power on 12 hours
3): set 60% full white balance, power on 12-24 hours
4): set 80% full white balance, power on 12-24 hours
5): set 100% full white balance, power on 8-12 hours

3.led screen will work normally after above mentioned steps, but there are a few points that we need to pay attention to

1)don not put the led screen with water in the flightcase in case the led lamps will be braised to get broken
2)If led screen is restored in warehouse with water, flightcase is probably affected also, you need to dry the flightcase under strong sun and 100% make sure it is dry so that you could move the cabinets into the flightcase
3)During the white balance test, there will have dead led, it is normal
There is no repair value if watered led screen in the flightcase for more than 72 hours, the stability will be influenced much, buy a new led screen is more practi

How to choose high quality small pixel led display

With the continuous improvement of LED display technology, small pixel LED display become more and more excellent. The industry named led display which pixel under 0.8mm small pixel led display. What should we consider about when we choose small pixel led display?
Price. Due to the pixel pitch become small, the led lamps are more intensive. It requirements of small led display heat dissipation, electricity and circuit is higher than other pixel led display. Now, Small spacing LED display technology is still in the development period, not very skilled, resulting in the small distance LED display price is very expensive. But with small pitch LED display technology is more and more skilled, more and more high capacity, the price will be declined. Just like the cellphone, the price is very expensive when it come out but when the cellphone flooded in the market the price is not so expensive.
From the maintenance aspect, although the LED display life is very long, the lamp is more, and the thickness requirements of indoor is lower than outdoor, resulting in the cooling effect is not very good, prone to failure. This situation is hard for small led displays maintain but now there is solution, front maintain led display. Attention should be paid to the purchase and application of small pixel led display
The brightness area ratio of LED display is the ratio of each pixel of luminous surface to the pixel of whole LED display screen, and led display is arranged by discrete pixels, pixels and pixels are very different. Some viewing effect is not good in very close distance and uneven brightness will have granular things. If the light source is in very small pixels, the brightness index of a pixel is very high; it will cause a strong visual impact.
Flat LED display is recognized in the industry ‘TCO’ 99 standard requirements, LED lights can not less than 50%, but now many of the LED display on the market cannot meet the requirements
The TV low-pass filter cut-off characteristics also affect the proper shooting distance of the LED display screen with different filling coefficients. The attenuation of small filling coefficients is more than large filling coefficients, so it required in long distance to take a photo. If the low-pass filter pass band is 4MHz, and the high frequency attenuation characteristic 12db/ octave, then the shooting distance of the fill factor 25% is more attenuated 1.15db than the fill factor 50%, and the shooting distance needs to be increased by about 10%. The increase of fill factor is the wider application of LED display color difference is more ideal, perfectly solved the dazzling problem, now the LED display creation conditions are also getting better and better.
It is aims to achieve high-definition of small distance LED display, enter the home appliance industry. Now the LED display is used as municipal project l and commercial media. If you enter the home appliance industry and sells to every family, which is undoubtedly a display revolution
More small pixel pitch led display all in optokingdom led display online mall

Hai sheng engineers analyze LED display control card FAQ

Hai sheng engineers analyze LED display control card FAQ
1. How to determine whether the control card is working properly?
After the control card is powered on, observe the power indicator first. The red light indicates that the 5V voltage has been connected. If it is off, turn off the 5V power supply immediately. Check whether the 5V working voltage is connected properly, whether it is overvoltage, reverse connection, failure, output short circuit, etc. Please use a separate 5V power supply for the control card. If the red light is not on, repair it.

2. When the control card is normal, why is there no display or abnormal brightness?
After connecting the control card and display driver, the default is 16 scan. If there is no display, please check whether the data polarity and OE polarity setting in the control software are correct. If the brightness is abnormal, one line is particularly bright, indicating that the OE setting is reversed. Set OE correctly.

3. When the message is sent to the control card, the system prompts “An error has occurred and the transmission failed.”
Please check whether the connection of the communication interface is correct and whether the jumper on the control card jumps in the corresponding level position. The parameters in “control card setting” are correct. Also, if the operating voltage is too low, please use a multimeter to measure the voltage above 4.5V.
4. Why does the display screen not display properly after the information is loaded?
Check if the scan output selection in the “Control Card Settings” is correct.

5, why 485 group network communication is not smooth?
Please check whether the connection mode of the communication line is correct, and connect the communication lines of the various screens together to the computer interface. This will generate strong reflection waves and cause serious interference to the transmission signal.