Static electricity hazards and preventive measures to led display

How standardized production? How to produce a low attenuation, long-life LED display in the true sense? This article is going static protection angle to discuss hazards and prevention measures in the process of led display production.

static electricity protection

  • Electrostatic hazards in the production process of the LED display.

If we ignore anti-static in any part of the production, it will cause electronic equipment failure or even damage it.

When the semiconductor device is separate place or load circuit, even not powered, static electricity can also cause permanent damage to these devices. Familiar, LED is a semiconductor product; it will cause damage to the element if the voltage between two or more pins of LED exceeds the breakdown strength of the component media. The thinner the oxide layer, the LED and driver IC greater sensitivity to static electricity, such as solder is not full and the solder itself quality problems, etc., will have a serious leak path, causing devastating damage

Another failure is due to the node temperature exceeding the melting point of semiconductor silicon (1415 ℃). Pulse energy of electrostatic can produce localized fever, so faulty lamps and direct breakdown of IC. The failure will occur even if the voltage is lower than the breakdown voltage of the media. A typical case, LED is diode formed by PN junction, breakdown between the emitter and base will drastically reduce current gain. After the LED itself or the drive circuit IC exposed to static electricity, it may not appear immediately functional damage to these components, the potential damage is usually in the course will be manifested, that is deadly damage to led display.

  • The reason of product static electricity

From the microscopic, according to the theory of atomic physics, substance power stays balance in the neutral state. Different substances electronic contact with the electrons pros and cons make the material loss of power balance to cause phenomenon of static electricity.

From a macro perspective, the reasons are: object between friction and heat, to stimulate electron transfer; contact and separation between objects generate electron transfer; electromagnetic induction caused by uneven distribution of surface charge; friction and the combined effect of electromagnetic induction.

Electrostatic voltage is produced by different kinds of material contact and separated from each other. This effect is the well-known friction electrification voltage generated depends on the mutual friction of the material itself. The main reasons to produce static electricity during led display production are body directly or indirectly contact with related components.

Therefore, we should make good static protection in the LED display production process to improve product reliability.

Optokingdom aims to offer quality led display to all over the world.

Influencing LED Display Quality have eight key processes

  • Influencing LED Display Quality have eight key processes

 LED display on the market today, good and bad quality, largely determined by the production process. LED display technology exist cost of the problem, many companies put too much in the technology led to LED display prices are too high. How to ensure the quality of LED display technology at the same time reduce costs? Need eight technical control to protect the quality of LED display.

First, LED mixed lights

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The same color of the different brightness of the file LED lights mixed lights, this procedure if the problem will lead to the LED display in the brightness of the local situation is not the case, a direct impact on the appearance of LED display.

Second, LED display cooling performance

If the LED display cooling performance is poor, the temperature is too high, then the stability of the LED will affect long-term down will make LED display acceleration performance degradation. So in this regard, we must do a good job of PCB board cooling design and cooling ventilation.

Third, Weld problem

When the LED display does not shine, the most likely case is due to solder joint caused. Weld, including many aspects, so the details must be done here. When the factory must also do a rigorous inspection.

Fourth, the drive circuit design

If the drive circuit design is not good, there will be LED display around the LED brightness lower than the middle.

Fifth, strict control over the wave soldering temperature and time

Preheating temperature of 100 ℃ ± 5 ℃, the maximum does not exceed 120 ℃, and the preheating temperature rise requires a smooth, welding temperature of 245 ℃ ± 5 ℃, welding time is recommended not more than 3 seconds after the furnace should not shake or impact LED, until Recovery at room temperature. Wave soldering machine temperature parameters to be regularly detected.

Sixth, the LED display line must control the verticality

A small deviation will directly affect the LED brightness consistency. Will lead to the emergence of inconsistent color. The LEDs must be perpendicular to the PCB.

Seventh, anti-static LED display

For anti-static LED display manufacturers must make adequate measures in this regard. A variety of anti-power settings must be done in place, but also regularly tested.

Eight, LED electric heating value

Typically, the maximum LED current can not be higher than the standard value of 20MA 80%, if it is a little smaller display must reduce the current value.

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LED display technology on every step of the details of the deal, in the details to do better, then the higher the quality of LED display.

Welcome to HSTV,we will offer good quality and more technology support.For more details,feel free to visit our website :www.optokingdom.com

How to reset led display when screen messy

The steps to reset messy led screen of  LINSN control system

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Step 1. connect computer and control card by USB and DVI cables and open software and click “option” choose “software setup” and input “linsn” with keyboard and then input password “168”

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Step 2. choose “receiver” and click “load from files” and click “ save to receiver” and choose “display connection” and load from file and resend date and save.

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Step 3. change sending card if it can’t work correctly after sending data.

More software operation video welcome to visit: http://www.optokingdom.com/video-list.html

Five indicators reflect full color led screen quality

With LED display price war intensified, there were a lot of low-quality products has been sold to the market. According to professional summary, full-color LED display quality mainly reflect in the following five points:

  • 1. Failure Rate

Because full-color display composed by thousands or even hundreds of thousands of points on groups of red, green, and blue LEDs, any color LED failure will affect the overall visual effect of the display. In general, the failure rate should not higher than ten thousandths (failure of the LED device itself causes) from assemble to 72 hours aging test before shipment according to the industrial experience.

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  • 2.Anti-static ability

LED is a semiconductor device and sensitive to static electricity.  Static electricity can easily lead to failure, so the anti-static ability is critical to the life of the display. Generally speaking, LED body static mode test failure voltage should not less than 2000V.

  • 3. Attenuation characteristics

The brightness of Red, green and blue LEDs will decay with the working hours increase. The merits of LED chip and auxiliary material and packaging process determines the level of LED decay rate. Typically, after 1000 hours, 20 mA at room temperature lighting test, the red LED attenuation should be less than 10%, blue, green LED attenuation should be less than 15%. Red, green, and blue attenuation consistency makes great influence white balance of led display, and then influence the fidelity effect of display.

  • 4. Brightness

LED brightness is an important determinant of LED display brightness. The higher LED brightness and greater use of the current balance, the better for power saving and LED stability. LED has a different angle value; the brightness has been set in the chip case, the smaller angle, the more LED bright, but the smaller viewing angle of the display. General should choose 100 degree LED to ensure the viewing angle of led screen. You should find the balance in brightness, angle and price according to the different pixel pitch and different viewing distance led display.

  • 5. Consistency

Full-color display is composed of numerous red, green and blue LED primitive. The brightness of each color LED, the wavelength of consistency determines the entire screen brightness uniformity, white balance consistency, chromaticity consistency. In general, the display device manufacturers require suppliers to provide 5nm wavelength range and 1: 1.3 brightness range LED; these indicators can be achieved by component suppliers were graded by spectral separation.

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LED devices as the most critical component full-color LED display, for three reasons: First, LED full-color machine is used in the largest number of key components, using only a few thousand to tens of thousands per square meter LED; secondly, LED the entire screen is to determine the optical properties of the main display, directly impact on the evaluation of the audience. In addition, LED display in the share of the overall cost in the largest proportion, ranging from 30% to 70%. LED selection is determined more than 50% of the entire display quality. If you fail to choose a good LED, no matter how well the other components of the display cannot make up the display quality defects.

All quality led displays on www.optokingdom.com

The four elements of improving rental led screen life

  • The four elements of improving rental led screen life

As we all know, Rental led screen is more and more popular,and the LED display was used for a long time.and some led screen may blur, dead lights and other phenomena, and life of these LED display will cause great influence and form additional maintenance costs, how to improve the service life of LED rental screen it?

Affecting the rental LED screen service life have many factors, such as: performance LED lamp beads, supporting parts performance, production processes and applications environment.

(1)The major factor :Performance LED lamp beads is associated most closely with LED display life . Detecting a LED lamp beads good or bad performance of the main indicators are: attenuation properties, UV resistance, water vapor permeability, etc.2a0b-tmp

(2)In addition to the factors of LED lamp, LED Rental Display also uses a lot of other ancillary components such as circuit boards, power supply signal interface, power supply, casing, masks, etc., wherein a part of any quality problems are likely to arise reduce the life of LED screen lease.

(3)LED display product manufacturing process can also affect the fatigue properties of LED display, thereby affecting their life. LED display manufacturing process mainly related to the following aspects: Component storage and presentment process, sealing technology, welding technology furnace, three anti-treatment processes.

(4)Rental LED screen applications environments both indoor and outdoor, different environments on the LED display life have different effects.Indoor temperature difference is small, LED display is not affected by rain, snow and UV rays, its relatively long life; but the temperature difference between the outdoor environment up to 70 degrees, and often susceptible to wind and sun and other factors, harsh external environment will accelerate the aging of the display, shorten the life of the display.

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   HSTV company purchased high-quality LED display parts and raw materials, the use of its own production technology, independent innovation, In order to provide better LED display products customers , resulting in better economic benefits, to achieve mutual benefit and win-win situation.

Welcome to HSTV,we will offer good quality and more technology support.For more details,feel free to visit our website :www.optokingdom.com— the FIRST LED SCREEN B2C online shopping Mall in the world now come Business formally!Every product is on an open price .We are always here for you!

What’s requirement for outdoor led display except high resolution?

Outdoor LED advertising screen requires a higher resolution to meet the clear display effect in long-range, high light environments compare with indoor full color led display.p16-a-10

Optokingdom online mall news: Outdoor LED advertising screen requires a higher resolution to meet the clear display effect in long-range, high light environments compare with indoor full color led display. The highest resolution of traditional LCD screen can only reach 1024*768 but for LED display normal display under sunshine requires resolution up to 1920*1200 at least. If you want to make outdoor led display work well in complicate outdoor using environment that there are other problem need to be solved. Such as waterproof, dust-proof, lightning protection, anti-riot, anti-reflective, and anti-electromagnetic interference etc.

What does led display need to meet except high resolution?

Outdoor led advertising display need to be featured waterproof and dust-proof. Water and dust is the first ordeal for outdoor led screen, which it requires the water protect rate up to IPX5 to ensure screen run well in rainy day. Dust is an important factor in accelerated aging outdoor led display; outdoor display equipment must be designed the structure of dust and dust filtration equipment, that is to say the protection rate need to up to IP65.

Outdoor advertising led display requires smart keep constant temperature. The heat of led display comes from three main aspects, sunshine, air convection and internal electronic components while it is working. It needs to equip with the device which can learn about the temperature of led display according to the position of install and temperature difference of geography to ensure it run well. No matter what methods that you used for led display heat dissipation ( air-condition cooling, forced air-cooled heat sink cooling) that need to meet the working temperature stay -30℃——55℃ and humidity during  10%——90%.

Outdoor advertising led display need to anti-riot and against theft. Outdoor led advertising display used in public places, so the security issue should be take consider in first. Avoid exposed screws, combined with anti-theft locks and rugged structural support, to solve security problem.

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Lighting protection is also requires for outdoor advertising led display. Outdoor display equipment also needs a reliable lightning electrical control design to ensure the device run well during a thunderstorm.

Anti-reflective! If you want to show clear content in outdoor environment that it need to adopt a special coating treatment glass which can improve the image of the visual point of view and resolution, reducing glare from the screen.

The outdoor environment is not controllable, so that anti-electromagnetic interference is very important for led display screen outdoor use. We can’t change the using environment but we can shield the components of led display that can prevent internal device, cables to signal disturb and external electromagnetic interference.

Optokingdom led online mall offer all kinds of led display to every client with open price. More discount all on www.optokingdom.com.

Outdoor LED screen which protection requirements

  • Outdoor LED screen which protection requirements

Outdoor LED display can be seen everywhere now,application is very broad, as we all know, outdoor LED display resolution the higher the better, then purchase outdoor LED display except high-resolution what is needed?

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There have four core factors:

1)Outdoor LED advertising screen to be waterproof and dust-proof,  all outdoor use, waterproof and dust-proof is the first face, revealing the equipment casing protection grade must reach water, general water level reached IPX5, can operate normally in the rain; dust an important factor is the accelerated aging of outdoor led display, outdoor equipment must be designed to show the structure of dust and dust filtration equipment, namely, protection grade need to achieve IP65.

2)Outdoor LED advertising screen to smart thermostats, outdoor led advertising screen in operation when radiation from the sun, heat convection, inside heat and other electronic components  three aspects of quality heat, led screen general meet temperature: -30 ℃ –55 ℃, humidity: 10% – 90% operation requirements.

3)Outdoor LED advertising screen to be anti-reflective, outdoor environment such that the interface is clearly visible, it is necessary to use a special coating treatment of glass, in order to improve the image of the visual point of view and resolution, reducing glare from the screen.

4)Anti-electromagnetic interference, the outdoor environment is not controllable, but the internal electronic components led display shielded approach that effectively prevent the internal device, the signal cable to disturb, but also to prevent external electromagnetic interference LED products.

Compared to indoor full color LED display, LED outdoor screen requires a higher resolution to meet the long-distance, showing the effect of the use of high-light environments. Outdoor LED advertising screen resolution needs to reach at least 1920 × 1200 or more to the normal display under the influence of the sun, without affecting the viewing experience.

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LED display quotes and budgetary assessments 14 strokes

 

Are you planning to buy LED display? Are you worrying about the costs? With years of experience, HSTV will provide you some detailed costs of LED display for your reference. Here we go!

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1. Display Screen Cost: Generally, how much is one square meter,i.e.,xxx USD/ ㎡? Price is different as the different material and screen module. Screen quotes include the whole set components that colored LED desired: die, module circuit board, IC driver chips, module power supply, steel cabinet and plastic masks and all the internal cables and so on.

2.Control system costs: that is display sending card and receiving card costs , Generally, one screen just need one piece sending card, which is installed in host computer. But the number of receiving cards is decided by screen size. In general, the larger area, the higher density that the screen is, the more receiving cards need to be used.

3.Computer for controlling: It’s the necessary equipment to control LED display. Computer configuration requirements: dual-core CPU, 2G memory, 512M or more discrete graphics, motherboards should have PCI slot.

4.Sound + Amplifier:The devices that allows screen synchronized video to emit sound, usually with 1 amplifier, 2 stereo.

5.Distribution cabinet: Small size LED display needn’t it; the recommended maximum power 10KW or more of display to use. It will provide stable voltage and current for each part of the device, effectively prevent the switch trip and other problem.

6.Cooling equipment: outdoor LED display more than 20㎡ must be configured air conditioning by the manufacturer to ensure the normal operation and prolong the life of each components of the display screen. Generally, indoor screen or small size screen needn’t it; large indoor display is strongly recommended with a wall-mounted air conditioner which is effectively cooling, ensuring the normally running in high temperature, reducing the failure rate.

7.Mufti-functional Card: the main role are smartly regulate the brightness and temperature and other values of full color LED screen so as to achieve energy saving and extend the life of led display; Indoor display may not be used.

8.Arrester: Used in outdoor LED display,primarily used for lightning protection; Indoor display may not be used.

9.Video Capture Card: TV card, a small card installed in the computer, coupled with the appropriate driver software that allows the display simultaneously broadcast cable channel program. Users can choose by themselves if needed. It’s inexpensive.

10.LED Video Processor: mainly to improve the whole display effect and function of the application of large-screen, fully tap the value of the display. To solve a variety of video signal access, process, and display problems,to complete signal format conversion between different formats.There are different brand and model number of LED video processor, the prices are also varies.

11.LED playback software: including computer system software, LED video playback software. They are generally provided free of charge.

12.Steel structure, Manual installation: The bracket for fixing and installing the display is usually with steel frame structure, and aluminum plate or stainless steel edging material. Labor cost of installation is included(suggestion: ask the manufacturer to provide free steel structure design drawings, look for local producers to make the bracket. It’s simple to produce that the average worker can complete it. Cost less and easy to install)

13.Shipment: It is depending on the  transport distance. Shipping also can be handled by themselves.

14.Technician fee: Sometimes when screen is shipped to the customers, the manufacture would send 1-2 engineers to guide the installation, commissioning on-site. Generally, customers simply responsible for general expenses and travel expenses accommodation of the technical engineers.

The above are costs summary about LED display from HSTV. For more details, feel free to visit our website http://www.optokingdom.com/ or send inquiry to our sales. We are always here for you!

Optokingdom teaches you the necessary skills of outdoor led display maintenance

  • Check

(1) The regular checking of each component. Check the stability and safety of components before the bad weather coming, especially check the connection and screws of steel structure. Deal with it in time if there is problem. Maintain the weld surface coating of steel structure regularly to prevent the corrosion and coating take off. The heat-dissipation equipment need to be check regularly to make sure is work well and to avoid the damage of circuit.

(2) Check the lightning protection facilities. Lightning rod, and a ground line need to be checked after a thunderstorm, if damaged must be replaced.

(3)The control system checking: Check the reliability of control system to ensure led display screen can work well. The circuit and other components also need to check in case of accident happen.

(4) Check led display power supply system. Check whether there is rusty and loose of wires connection. The ground wire of distributor must ensure proper functioning and other cables also need to be checked regularly.IFSE6 (4)

  • 2. Maintenance measures

(1)It requires keep using environment led display screen using environment dry. Screen cabinet inside is strictly prohibited water, if it watered due to accident that should be powered off immediately. It can work again until every component dry. It will not only cause the screen led display internal parts corrosion but also cause irreparable damage to the big screen if wet screen is energized.

(2)Outdoor led display screen work in outdoor environment for long time that dust will damage the circuit of it. So regular clean the dust of led display can improve the display effect of big screen.

(3)You can use soft brush gently scrub the accumulation of dust on the surface of LEDs. It will help a lot for led display if you can make regular clean according to the using environment.

(4)Power supply of the screen is required to be stabilized, and should be good grounding protection, otherwise causing “burn board” phenomenon.

(5)The right turn on and turn off process of led display screen is open operate computer first and then turn on outdoor led display screen. And the turn off led display screen first and turn off computer. Do not frequently switch, at least for a time interval of 5 minutes or more. Minimize led display screen under full bright or runaway situation because the impact current is largest at that time.

(5)The led display control devices should be placed in a separate room which anti-dust, ventilation, refrigeration and other measures to ensure the normal and stable operation of the equipment.

  • Conclusion

Failure occurred is inevitable in using electronic product, so timely maintenance is very important for led display screen. So client can let someone who good at in select electronic, operating led computer and have a strong responsibility to responsible for the daily maintenance. Consider this matter that Optokingdom manufactures top quality led display screen for every customer and offer timely free online service for every client. Optokingdom also offer free training and offer video teaching course to everyone who purchase led display screen on Optokingdom online mall.IMG_6752

Outdoor Rental LED display

How to do water and moisture protected for LED screen

How to do water and moisture protected is a problem that outdoor LED advertising display has been facing. As outdoor LED display is installed in a more complex environment than in door led display, we not only need to consider the problem of moisture, but also need to make water prevention and other routine maintenance work. Good seal installation will reduce the risk of water, also regularly clean up the dust attached to the display screen is good for cooling and reducing the adhesion of water vapor. Water flow into LED screen may cause dead lights, so water prevention must to be done on outdoor full color LED screen in production and construction process.

1. Water prevention during producing and manufacturing

When producing and manufacturing LED screen, anti-corrosion treatment must to be done on PCB board, such as to coat three anti-paint, select quality accessories of power supply and power cord.

What’s more, firstly, different cell plate materials need to use professional waterproof coating. Secondly, different cell plate set need to have waterproof grooves, finally, we need to pay attention to waterproof problem of outdoor LED screen back plane, as in the process of lED screen using, the back plate is not only the heat treatment, but also has great convenience in dealing with water-resistant.

2. Water prevention during on-site installation and construction

In the specific construction site, waterproof and drainage design should be combined. After the structure is determined, based on the characteristics of the structure, we can consider the seal materials feature a pipe structure in vacuoles, compression set small, Ultimate elongation and so on. Once selected, depending on the characteristics of the seal material, design appropriate contact surface and the contact surface of the force, to make the sealing strip squeezed into compact shape. Do focus protection on those installation and water grooves  location to ensure that the internal screen come without any water.

3.Pay attention on daily use

LED screen will generate some heat when working, which will evaporate some water vapor, that greatly reduces the possibility of short circuits caused by moisture. LED display manufacturer HaiSheng LED  co., ltd  suggest you, in the rainy season, to use LED screen more than once a week and to start at least once a month, lit more than 2 hours.

4. The proper remedy when water entered in LED screen

Blow-dry LED display screen by the fastest speed with the fan or other tools. Power aging the screen after completely dried. Specific steps are as follows:
Adjust brightness (all white) to 10%, power aging 8-12 hours
Adjust brightness (all white) to 30%, power aging 12 hours
Adjust brightness (all white) to 60%, power aging 12-24 hours
Adjust brightness (all white) to 80%, power aging 12-24 hours
Adjust brightness (all white) to 100%, power aging 8-12 hours

Precautions:

Do not put the in-fluent LED screen in flight case, which will break down the LED light. When water entered into warehouse, water will enter into flight case, too. It’s necessary to expose all the flight case to prevent evaporation of water into the LED screen. When water entered into LED screen, if not promptly treated, the stability of the matrix screen will be influenced. In emergency treatment, dead light may continue to occur when the screen powered. Almost no repair value if this situation occur more than 3 days, handle carefully, please.