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Water Penetration of LED display Screen Treatment Methods And Considerations

Summer is a rainstorm prone period, there are water intake phenomenon on the led display   accidentally, how should we deal with it in order to minimize the loss? Now Optokingdom share with you the correct measure encounter this kind of situation:
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1, with the fastest speed with fans or other tools, the water penetration LED screen completely dried.

2, completely dry the screen after the aging of the body, the specific steps are as follows:

A, the brightness (All white) tune to 10%, electrify aging 8-12 hours.

B, the brightness (All white) tune to 30%, electrify aging 12 hours.

C, the brightness (All white) tune to 60%, electrify aging 12-24 hours.

D, the brightness (All white) tune to 80%, electrify aging 12-24 hours.

E, the brightness (All white) tune to 100%, electrify aging 8-12 hours.

With the above procedure, the LED screen will be restored to normal, but the following points should also be noted during the process:

1, in the discovery of LED display screen water, it should be urgent to deal with it, do not delay time.

2. Organize personnel to blow dry the LED display screen of the water penetration.

3, do not put the LED display screen body into the air box, so that it is easy to LED lamp muffled.

4, if installed LED display of the air box into the water, should be carried on all the cases of exposure, to prevent the water in the container after the volatile to the LED display screen.

The stability of 5, all the influent LED display does not affect the timely processing of the screen may be more or less, in the emergency treatment process, the screen electricity may occur after dying light phenomenon, please observe the user.

6 、 all the water penetration LED display screen is in the Flight Case. More than 72 hours, the screen is basically no correction value, please handle carefully.

You may need to know More about Comprehensive LED display troubleshooting methods. professional production display 10 years of experience, the old manufacturers, at any time for your service! Meanwhile, our platform has also opened a personalized online self customized product solutions and rapid access to quote and estimate budget for you, allowing you to get more intuitive solutions and save your time. Just register as a member, and free design your led display solution at once!

Why LED Screen Gets Hot When They Are On

The reason for the LED screen getting warm or overheats is that the electrical energy added is not all converted into light energy, but partly converted into heat energy. The light efficiency of LED is only 100lm/W, and the electro-optic conversion efficiency is only about 20~30%. That is to say, about 70% of the electricity is converted to heat.

Specifically, the generation of LED junction temperature is due to two factors:

1., the internal quantum efficiency is not high, that is, in the electronic and hole composite, and not 100% of all photons, usually referred to as “current leakage”, so that the PN region carrier composite rate decreased. The leakage current is multiplied by the voltage, which is the power of this part, which is converted to heat, but this part is not the main component because the internal photon efficiency is already close to 90%.

2., the internal generated photons can not be all shot outside the chip, and finally converted to heat, this part is the main, because this is called external quantum efficiency of only about 30%, mostly converted to heat.

As previously mentioned although incandescent light efficiency is very low, only about 15lm/W, but it will be almost all electrical energy into light energy and radiation out, because most of the infrared radiation is, so the light efficiency is very low, but with no heat problem

In recent years, as a new generation of lighting technology, LED display technology has received extensive attention. LED power is increasing, and the heat radiation problem has been paid more and more attention. This is because the LED light or its life is directly related to its junction temperature, the heat is not good as high temperature, short life.

Unlike incandescent lamp and fluorescent lamp used in the past, their energy loss is great, but most of the energy is out through the infrared radiation source directly, less heat; and LED, as well as visible light energy consumption, other energy is converted into heat. Because of the gradual development of electronic products to high density and high integration, Led products are no exception, so solving the problem of Led heat dissipation has become the main problem of improving Led performance and developing Led industry.

Some Dos and Don’ts When Installing LED Display Modules

At present, with the increasingly wide application of LED display, consumers in the purchase of the LED display will usually require manufacturers to help install, it is said that the LED display is a technical discipline required to install LED. Although the technical staff of experienced, LED display installation is hundreds of times, but for some technical personnel just new to LED display industry, in the installation of LED display is often easy to overlook some situations, resulting in unnecessary problems.
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1, The installation of the LED display module, the requirements of the use of double-sided adhesive or wood glue, so that the module card slot and suction plate firmly affixed. In the use of double-sided adhesive, it is necessary to add a glass glue, or in the sun for a long time under the sun, will cause the mold off. Remember!

2, LED display module with low voltage input, so not without power supply and direct access to the 220V, otherwise it will cause the whole burnt LED Screen module. Remember!!

3, Blister word or arranged in the box body module, as far as possible by three points, four points, in line to make the whole word or the box body to form a loop, or a loop, i.e. each stroke at the end of the module according to the positive and negative electrode is connected with the two power line.

4, Switching power supply according to the characteristics of the LED display module to adjust the output voltage, please do not use the rotating voltage adjustment button.

5, LED special switching power supply. Power can only moisture, not waterproof, so the power supply must be waterproof measures.

The positive and negative points, there are 6 LED display module, power supply port wiring installation note must correspond to the positive pole and the negative pole, if the positive and negative reverse, LED display module does not light, and will not damage the LED screen module, as long as the switch to normal.

7, LED display module are used low-voltage input, the power supply is installed in the light-emitting LED display module within 10 meters.

8, The installation can not push, squeeze, pressure LED display module on the device, so as not to cause damage to the device, affecting the overall effect. Remember!

9, Single line length of 12~m, 15~m, respectively, according to the actual use of two. The bent connecting wire (including the unused connecting thread) is fixed on the blister bottom plate with the glass glue to prevent the shading.

10, In order to prevent the connection line is easy to fall off from the wire seat, the line seat design has a barb, if inserted in the inconvenience, should withdraw from the re insert. We must confirm the connection LED display module wire has been firmly seated, otherwise it will cause off day after.

11, There is no water treatment of the LED screen module, installed in the font or box, should prevent rainwater into the font or box.

12, LED display module spacing can be adjusted according to the requirement of the brightness, each square cloth point the best control in 50~100 group.

13, The power supply port outlet module series number not more than 50 groups, otherwise the tail module will be due to voltage attenuation, resulting in LED screen module brightness reduction. Although the formation of the circuit can avoid the occurrence of attenuation, but should not be connected to too many LED display modules.

14, The power line access to the box, must first through the four line or the three line and the corresponding group of four or group of modules connected. When the power cord enters the box, a large junction should be made to prevent the LED display module from being pulled out.

LED display Communication Methods

One of the most important parts of any electronic displayproduct is how to communicates with the software and how you can update it. Lots of factors need to be considered to decide about the best communication method. To choosing which communication method suites your needs, you need to answer the following questions

  • How often do you change the led display information?
  • What is the distance between your computer and the LED display?
  • What is elevation of your display and how accessible is it?
  • Can you provide cable or Wi-Fi internet connection in the display location?

There are lots of different communication methods and each method has its advantages and disadvantages.

USB Communication

USB communication method is the most basic type of communication. In this method, software exports the new message and design as well as new settings to a USB drive. Then, the USB is plugged in to the USB port of the display to transfer the data. After new data is transferred automatically, the USB drive can be detached.
USB Communication for LED Signs

Advantage:

This is the most basic type of communication. It means no extra cost and more reliable and easy repair and maintenance method hence there is no multi-step complex parts between your computer and your LED display. It could be used as a backup communication in case of any faulty with other communication methods.

Disadvantage:

To use USB communication method, you need to have access to the LED display USB port. In case of the signs installed in high elevation or out of access, USB communication needs cabling or special consideration.

Wi-Fi Communication

Wi-Fi communication has been standard option for LED display screen communication because it is inexpensive and doesn’t limit the location of the display and location of the content management software. In this method, content management software communicates with internal Wi-Fi module of LED display screen directly using 2.4 GHz standard Wi-Fi frequency. This is the most common type of communication because it doesn’t need any other Wi-Fi or networking equipment.Wi-Fi Communication for LED Signs

Advantage:

Wi-Fi communication is the best is you have a LED signs or LED screen installed out of access within 100m or if you want to update your LED screen very often. It is inexpensive, flexible and doesn’t need extra communication devices installed.

Disadvantage:

This communication method is limited up to 100m in open area. Building or walls may reduce the coverage range result in shorter communication distance.

Internet Communication

This communication method is best for controlling one or several electronic sign from far distance. In this method, controlling software communicates with the LED signs or LED screen through internet connection. In the back-side, Content Management Software send the new design or settings to a could sever by using any type of internet connection. In the display side, the display can download the data from cloud sever using another internet connection and update the settings and information. Therefore, there is not distance limitation between the controlling PC and the sign.
Internet Communication for LED Signs

Advantage:

Can control one or several LED Signs or LED displays from any computer with the software installed and connected to internet. It is not limited to distance. Can use Secure TCP/IP.

Disadvantage:

Internet connection needs to be provided in the display location. Monthly connection fee is required If there is no internet connection available in the sign location. Internet connection in the display location may need modem (ADSL or 4G) installation or cabling.

Mobile Data – GPRS Communication

This communication method is best for controlling outdoor or mobile electronic signs from far distance. For this type of communication, we use specific control cards with data SIM Card option. Similar internet communication method, controlling software communicates with the LED signs or LED screen through internet connection. In the back-side, Content Management Software send the new design or settings to a could sever by using any type of internet connection. In the sign side, the display downloads the new design from cloud sever using SIM Card mobile data (GPRS/3G/4G) and update the settings and information.
Mobile Data 3G,4G,GPRS Internet Communication for LED Signs

Advantage:

Can control one or several LED Signs or LED displays from any computer with the software installed and connected to internet. LED Signs can be mobile or fixed. It is not limited to distance. Doesn’t need any data cabling in the display location.

Disadvantage:

Monthly connection fee is required regarding mobile data plan.

What is the Refresh Rate and Gray Level of LED Display

What does LED display refresh rate and gray level mean? As follow optokingdom Engineer will explain for everyone.

With the development of indoor LED display and application more and more, both in the command center, the monitoring center and the studio, you can see the LED display is widely used. However, the overall performance of the LED display system, the display is able to meet the needs of the users? Whether these LED display images can accord with human visual viewing? These LED display can withstand different camera angles of different camera shutter test? This is the LED display needs to face the need to consider the problem, I would some factors affecting LED display (including the refresh and gray level etc.) make a analysis.
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LED display refresh rate (visual refresh rate)

“Visual refresh rate” refers to the rate of screen updates, usually in Hertz (Hz) as a unit, in general, the visual refresh rate of more than 3000Hz, for high-performance LED display. The higher the visual refresh frequency, the more stable the screen display, the smaller the sense of visual flicker. LED display low “visual refresh rate”, in addition to its influence on camera, photography, horizontal horizontal stripes, but also has a similar lighting and flashing tens of thousands of pieces of image, the human eye watch may therefore produce discomfort, and even cause damage to the eyes.

Although the human eye, the visual refresh rate of more than 60Hz has been felt is a continuous picture, but the higher the visual refresh frequency, the more stable the image display, the more difficult to feel the human eye fatigue. Now in the high quality video, in order to get a more detailed picture, such as wonderful playback or close-up photography process, have to take more than 1000Hz per second camera. At this time, LED display for will be captured, under the high-speed shutter can still show footage (no black scan line) or continuous tone, is a great challenge.

Gray level of LED display screen

“Gray level” refers to a variety of colors in between the dark and the light, the color changes with different class, generally in the 14 bit gray scale (bit), which has at least more than 16384 kinds of color class, is a high-performance LED display screen. If the gray series deficiencies, lack of hierarchy or color will occur is gradient color gradation is not very smooth, but can not fully show the color film. LED display screen effect greatly reduced. Some of the low efficiency of the LED display screen in the 1/500s shutter, you can check out the obvious color distribution, if we increase the shutter speed, such as 1/1000s or 1/2000s, the situation will be more obvious.

What is the impact of the LED screen refresh rate and gray level?

We know that LED screen several core components, such as LED switching power supply, LED drive chip, LED lamp, the refresh frequency and gray level LED display, LED driver chip directly determines the LED screen frequency, gray level refresh in visual performance. In the current LED driver chip, the high technology “ScrambledPWM (S-PWM) technology, S-PWM technology is to improve the traditional pulse width modulation (PWM) technology, which will be an image conductiontime dispersed into a number of shorter turn-on time to increase the overall visual update rate. Further, a new generation of LED driver chip built-in S-PWM technology, can be originally each frame (frame) counting time (LED ON, LED OFF grain grain) way, broken down into several average counts, and each scattered parts, can not maintain the original scattered before the ratio of On/Off. As shown below.

S-PWM technology provides a different counting mode, so the image refresh rate can be raised to a maximum of 64 times. If replaced by S-PWM to improve the image refresh frequency of the operation, just use a low order clock (such as 5MHz) can be easily refresh the visual refresh rate 64 times, and can reach more than 4800Hz. Compared to the general video refresh rate of at least 10 times higher than the capacity, but also to avoid the occurrence of high frequency electromagnetic interference (EMIissue), over-voltage surge (Overshoot) and under voltage surge (Undershoot) problem.

S-PWM driver chip LED display, with a digital camera high-speed shutter to take photos, there will still be no horizontal black scan line and color distribution (as shown below). Its visual refresh frequency, the performance of gray level, far beyond the use of traditional switching type driver chip LED display.

High quality LED driver chip, built in S-PWM technology, making the refresh rate of up to 3840Hz, gray level up to 16bit, in the case of high-speed shutter camera, after the emergence of the level of black scan lines and color distribution

Considerations On Installing LED Display Module

At present, with the increasingly wide application of LED display, consumers in the purchase of the LED display will usually require manufacturers to help install, so that the LED display is a technical discipline required to install LED. Although the technical staff of experienced, LED display installation is hundreds of times, but for some technical personnel just contact LED display soon, in the installation of LED display is often easy to overlook some places, resulting in unnecessary problems.
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1, the installation of the LED display module, the requirements of the use of double-sided adhesive or wood glue, so that the module card slot and suction plate firmly affixed. In the use of double-sided adhesive, it is necessary to add a glass glue, or in the sun for a long time under the sun, will cause the mold off. Remember!

2, LED display module with low voltage input, so not without power supply and direct access to the 220V, otherwise it will cause the whole burnt led module. Remember!!

3, Blister word or arranged in the box body module, as far as possible by three points, four points, in line to make the whole word or the box body to form a loop, or a loop, i.e. each stroke at the end of the module according to the positive and negative electrode is connected with the two power line.

4, switching power supply according to the characteristics of the LED display module to adjust the output voltage, please do not use the rotating voltage adjustment button.

5, LED special switching power supply. Power can only moisture, not waterproof, so the power supply must be waterproof measures.

The positive and negative points, there are 6 LED display module, power supply port wiring installation note must correspond to the positive pole and the negative pole, if the positive and negative reverse, LED screen module does not light, and will not damage the LED display module, as long as the switch to normal.

7, LED display module are used low-voltage input, the power supply is installed in the light-emitting screen LED module within 10 meters.

8, the installation can not push, squeeze, pressure LED screen module on the device, so as not to cause damage to the device, affecting the overall effect. Remember!

9, single line length of 12~m, 15~m, respectively, according to the actual use of two. The bent connecting wire (including the unused connecting thread) is fixed on the blister bottom plate with the glass glue to prevent the shading.

10, in order to prevent the connection line is easy to fall off from the wire seat, the line seat design has a barb, if inserted in the inconvenience, should withdraw from the re insert. We must confirm the connection LED screen module wire has been firmly seated, otherwise it will cause off day after.

11, there is no water treatment of the LED display module, installed in the font or box, should prevent rainwater into the font or box.

12, LED display module spacing can be adjusted according to the requirement of the brightness, each square cloth point the best control in 50~100 group.

13, the power supply port outlet module series number not more than 50 groups, otherwise the tail module will be due to voltage attenuation, resulting in LED display module brightness reduction. Although the formation of the circuit can avoid the occurrence of attenuation, but should not be connected to too many LED screen modules.

14, the power line access to the box, must first through the four line or the three line and the corresponding group of four or group of modules connected. When the power cord enters the box, a large junction should be made to prevent the LED display module from being pulled out.

Optokingdom Shares The Solution to A Bright Line Problem of LED Screen

Nowadays, from the small storefront door to the hotel, conference hall, film city, airport station, more or less will install a LED screen.

When we are using the LED screen, sometimes it will appear a bright line problem, which seriously affects its display effect. Then, how to deal with this problem? Optokingdom thinks that professional LED screen manufacturers can solve this problems from three aspects.

LED display is a complex LED lamp screen polymerization. The device comprises a unit board, a control card, a power supply, a box body, a bracket, etc.. Recently, a friend of the screen when playing a bright line. Has been unable to solve, optokingdom here to share solutions.

1. You should determine that the power is not damaged or it can not properly use, then check the power supply and control unit board. If you have measured the output voltage that is between 4.9 ~ 5.5v, the outside of this range is likely to be that the power supply is broken.

2. You should check whether the control card is not used normally. If not, you need check whether there is a 5Vpower supply. In that time, you need use the control card software to find the control card, if you can find the function of the control cards to send content, then check the communication lines.
3. You can check the cell plate to see whether it is good or not. LED screen signals are transmitted from one plate to the input of the other plate. So there is a board problem, then, it will affect the back plate. So you need check the cell plate one by one .

Eight Factors Influencing The Design Of LED Display Screen

LED display is widely used in public places, the square is a large screen for the LED screen, with long life, low energy consumption and other characteristics. LED display in the design if not appropriate, will affect the use of the future, this paper summarizes the eight factors in the LED screen design should focus on:

1, Heat dissipation design

LED work will heat, the temperature is too high will affect the decay rate and stability of the LED, so the heat dissipation design of the PCB board, the design of the ventilation and heat dissipation will affect the performance of LED.

2, Mixed lights

The same color different brightness of the LED need to mix lights, or in accordance with the law of the discrete design of the plug in the light of the lamp, in order to ensure the consistency of each screen color brightness. This process if there is a problem, there will be a large screen local brightness inconsistencies, a direct impact on the large LED screen display.

3, Design current value

The nominal current of LED is 20mA, it is recommended that the maximum current is not more than 80% of the nominal value, especially for small spacing of large screen, due to poor thermal conditions, but also to reduce the current value. According to the experience, due to the red, green, blue LED decay rate of inconsistency, targeted to reduce the blue, green LED current value, in order to maintain the consistency of the white screen after a long time to use the screen.

4, Drive circuit design

The drive circuit board driver IC on the large screen module will also affect the brightness of the LED. Due to the drive IC output current in the PCB board transmission distance is too far, it will make the transmission path pressure drop is too large, the impact of the normal operating voltage of LED led to its brightness reduction. We often find that the LED brightness around the big screen module is lower than that in the middle. Therefore, to ensure the consistency of the large screen brightness, it is necessary to design a good driver circuit layout.

5, Control the verticality of the lamp

For in-line LED, there must be sufficient technology to ensure that the LED is perpendicular to the PCB plate during the furnace. Any deviation will affect the LED brightness consistency has been set up, there is a different color brightness.

6, Control.

Big LED screen in the LED does not shine, tend to have more than 50% probability caused by various types of weld, such as the LED pin IC pin weld, weld, weld and base pin row. These problems need to be improved by improving the process and quality inspection. The vibration test before the factory is also a good test method.

7, Wave soldering temperature and time

To strictly control the wave front welding furnace temperature and time, suggestions are: preheating temperature of 100 DEG C – 5 DEG C, the maximum not more than 120 DEG C, and preheating temperature rise for a smooth, welding temperature is 245 DEG C – 5 DEG C, the welding time that no more than 3 seconds after the furnace avoid vibration or shock LED. Until the restoration of the normal state. The temperature parameter of crest welder should be checked regularly, which is decided by the characteristics of LED, overheating or fluctuating temperatures will directly damage the LED or LED caused by quality problems, especially for small size such as round and oval LED 3mm.

8, Anti-static

Large LED screen assembly factory should have good anti-static measures. Special anti-static, anti-static flooring, anti-static, anti-static soldering pad, anti-static ring, anti-static clothing, humidity control, equipment grounding (especially cutting machine) are the basic requirements, and the use of electrostatic detection instrument regularly. For more LED display information, please continue to visit Optokingdom.com

How to reasonably planning the installation position of large LED screen

Outdoor advertising is a big trend, only active responders can master more initiative. In the big billboard was transformed into LED large screen process, the installation location, screen quality, playback content three factors are indispensable. Which LED display installation location is the direct impact of advertising revenue factors.
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1. The system can automatically adjust the brightness adjustment system

We know that day and night, different times and places the brightness of the environment changes greatly, if the large LED screen display brightness greater than 60% of the ambient brightness we obviously feel the eyes do not meet, that is caused by the light pollution to people The Through the outdoor brightness collection system, at any time on the environment brightness collection. Display flat control system through the receiving system data automatically converted by software for the environment broadcast brightness.

2. Multi-level gray correction technology

Ordinary display system uses 8bit color display level, so that in some low gray and color over the color blunt. Will also cause color light does not meet. The new large LED screen control system uses 14bit color display level, greatly improving the color in the excessive hardness. So that people can feel soft when watching. To avoid people’s discomfort to light.

3. The installation of a reasonable choice of location and display area of the reasonable planning

Viewing distance and viewing angle with the display area has an empirical plan, while the image study in the display viewing distance and viewing angle has specific design requirements. In the design of the display should be as much as possible to meet the design requirements, reasonable planning.
outdoor rental led display
Actually, the next few years the domestic LED display large screen market is still in the growth trend, the main growth space will mainly come from the traditional inkjet, neon lights, billboards to replace the market, as well as high-definition, 3D, intelligent, monitoring the market, road traffic Function high-end LED electronic display market. As long as the standard industry order, display manufacturers to enhance the level of research and development, enhance their core competitiveness, product demand to guide the market, will be in the fierce competition in the market to win a place.

Optokingdom engineer teaches you how to Troubleshoot your LED screen

When using LED screens it is inevitable to face some problems sometimes. Now Optokingdom engineer would like to tell you how to distinguish and determine the LED display fault diagnosis.

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1.Check if the graphic card settings is well or not, according to the instruction in the CD-ROM electronic file.

2. Check the basic connection of the system, such as DVI cable, network cable, the sending card and computer PCI slot, and the serial cable connection.

3. Check if  the computer and LED power supply system have met the needs or not. When the LED screen’s power is low, the LED screen flicker when it show only white color. You should use appropriate power supply according to the actual needs.

4. Check whether the green light of the sending card has a regular flashing, if flashing see next Step 6 directly, if not flashing, restart. Before entering the win98 / 2k / xp please check the green light is flashing regularly or not. If  flashing, please turn into Step2, to check if the DVI cable is connected properly. If the problem is not resolved, then there must a problem of the sending card, the video card and the DVI cable. please repeat step 3 after replacing one of them.

5. Follow the instructions of the software to set or re-install and then set until the sending card green light flashes, otherwise repeat step 3.

6.Check whether the green light (data light) of the receiving card is flashing synchronously with the green light of the sending card. If it blinks turn to Step 8, check that the red light (power) is on. If it is on please turn to Step 7, If the power supply is not on, check if the power supply is reversed or the power supply doesn’t have output. If the power supply voltage is 5V, turn off the power supply, remove the adapter and cable to try again, if the problem is not solved for the receiver card failure , Replace the receiving card, repeat step 6.

7. Check whether the network cable is connected well or too long (you must use the standard CAT5 network cable, the network cable without repeater is the longest distance and 100 meters). Check whether the cable is made according to the standard (see the system installation and setup ), If the problem is not resolved to receive card failure, replace the receiving card, repeat step 6.

8. Check if the LED screen power light is on. If not, go to step 7 and check that the interface of the adapter card matches the LED module.

More Troubleshooting tips about your led display please visit our website http://www.optokingdom.com/user-manual.html

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