Parameter and Term Analysis of LED Display Screen

LED display parameters and terms:1. LED brightnessThe brightness of LED is generally expressed by luminous intensity, and the unit is candela CD; 1000ucd (micro candela) = 1 MCD (millicandela), 1000mcd = 1 CD. The light intensity of a single LED for indoor use is generally 500ucd-50 MCD, while the light intensity of a single LED for outdoor use is generally 100 mcd-1000 MCD, or even more than 1000 MCD.

Parameter and Term Analysis of LED Display Screen 1

2. LED pixel moduleThe LEDs are arranged into a matrix or pen segment and prefabricated into standard size modules. 8 * 8 pixel module and 8-character 7-segment digital module are commonly used for indoor display screen. The outdoor display pixel module has 4 * 4, 8 * 8, 8 * 16 pixels and other specifications. The pixel module for outdoor display screen is also called collecting tube bundle module because each pixel is composed of more than two LED tube bundles.3. Pixel and pixel diameter

Each LED light emitting unit (point) in the LED display screen that can be individually controlled is called a pixel (or pixel). Pixel diameter refers to the diameter of each pixel, in millimeters.For indoor display screen, generally one is a single LED with a circular shape. There are 3.0, 3.75, 5.0, 8.0 and so on, among which 3.75 and 5.0 are the most common.In the outdoor environment, in order to improve the brightness and increase the sight distance, one pixel contains more than two cluster LEDs; Since more than two cluster LEDs are generally not circular, the pixel diameter of solid outdoor display screen is generally expressed by the average distance between two pixels: 10, 11.5, 16, 22, 25.

4. Point spacing, pixel density and information capacityCenter distance or dot pitch of two pixels of LED display screen; The number of pixels per unit area is called pixel density; The amount of display content per unit area is called information capacity. The essence of the three is to describe the same concept: the point spacing reflects the pixel density from the distance between two pixels, and the point spacing and pixel density are the physical properties of the display screen; Information capacity is the unit of information carrying capacity of pixel density.The smaller the point spacing, the higher the pixel density, the more information capacity, and the closer the distance suitable for viewing.

The larger the point spacing, the lower the pixel density, the less the information capacity, and the farther the distance suitable for viewing.5. ResolutionThe number of rows and rows of LED display pixels is called the resolution of LED display. Resolution is the total number of pixels of a display screen, which determines the information capacity of a display screen.

Parameter and Term Analysis of LED Display Screen 2

6. LED panelThe LED pixel modules are assembled and arranged into a matrix according to the actual size, and equipped with special display driving circuit, DC regulated power supply, software, frame and external decoration to form an LED display screen.7. Grayscale

Grayscale refers to the degree of light and shade change of pixels. The grayscale of a primary color generally has 8 levels to 1024 levels. For example, if the gray level of each primary color is 256, the display color of the dual primary color screen is 256 256 = 64K color, also known as 256 color display screen.8. BicolorNowadays, most color LED displays are dual primary color screens, that is, each pixel has two LED tube cores: one is red tube core and the other is green tube core. When the red light die is on, the pixel is red, when the green light die is on, the pixel is green, and when the red and green die are on at the same time, the pixel is $. Red and green are called primary colors.

9. Full colorRed green double primary color plus blue primary color, three primary colors constitute full color. Because the blue tube and pure green tube core constituting full-color are more expensive, there are relatively few full-color screens at present.

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Analysis of Market Development Trend of Small Spacing LED Display Screen
Analysis of Market Development Trend of Small Spacing LED Display Screen
In recent years, small spacing LED display screen has developed rapidly, which has the trend of sweeping the whole LED display industry. After the indoor small spacing, outdoor small spacing has gradually become a market hot spot for many LED display manufacturers. Previously, the industry predicted that the market scale of outdoor small spacing LED display screen may reach 100 billion in the future. This assertion is like thunder on the ground, which makes people excited and nervous.From the new product release trends of major industry exhibitions and LED display manufacturers in the industry, the point spacing record of outdoor applications has been refreshed again and again, and all enterprises have tried their best to seize a place in the blue ocean market of outdoor small spacing. It is understood that at present, the small outdoor spacing of jrcld Jingrui Chuangxian has exceeded p2.6, and there have been corresponding application cases. At the same time, many leading screen enterprises in the industry also began to develop in the direction of small outdoor spacing. The person in charge of an industry enterprise once said that the outdoor small spacing will reopen the outdoor and semi outdoor digital Notice market that the LCD splicing screen has failed to start effectively, and will create an emerging market of nearly 20 billion yuan in the domestic outdoor / semi outdoor small advertising screen market. This shows how attractive the outdoor small spacing LED display market is!The development of small outdoor spacing to p2.5 and even P1.2 is an inevitable trend in the future. With the advent of the new retail era, the outdoor commercial display market is constantly exploding. For example, advertising machines, bus stop boards, advertising windows and other display platforms in close contact with people. If we want to achieve good interaction between the content information of LED display screen and the audience, whether P8, P6, P4 and P3 can not be satisfied, the intervention of J small spacing is inevitable.Driven by the market demand of outdoor commercial display, outdoor small spacing LED display has a considerable market development space. At the same time, with the superposition and use of screen interaction technologies such as infrared induction, face recognition, touch, 3D and VR / AR, the outdoor small spacing LED display becomes more vivid. With the support of these interaction technologies, Jingrui Chuang shows that the development prospect of outdoor small spacing LED display is very promising.Of course, there are still some technical difficulties in outdoor small spacing. For example, it is difficult to solve the problems of glue filling and plastic parts kit, and the cost of using metal kit is too high... In the second half of 2017, screen enterprises represented by a company made significant progress in cob packaging technology, Cob packaging has also become the best solution to various questionable problems in the outdoor small spacing industry. It is believed that in 2018, with the further stability and promotion of cob packaging technology, it can well help jrcld Jingrui create an outdoor small spacing market.fqj
The Market Demand for LED Display Screen Is Improving, and the Production Capacity Demand of Mini / Micro Breaks Out
The Market Demand for LED Display Screen Is Improving, and the Production Capacity Demand of Mini / Micro Breaks Out
Since the end of the year, we have obviously felt the recovery of market demand. As the LED display industry enters the traditional peak season, coupled with the continuous release of demand for high-definition video display equipment in the terminal market, especially after new display products such as mini / micro began to enable the market, the production capacity began to become the focus of upstream and downstream enterprises in the industrial chain.As we all know, China's LED display industry has been in a dominant position in the global field, and after leading for several years, China's LED display industry is further opening up its leading distance. Statistics show that with the development of high definition display market such as small spacing and Mini/Micro LED, it is estimated that the total capacity of Chinese mainland's panel will reach 55% in 2020. In addition, since this year, almost all international giants such as Europe, America and South Korea have stopped work and reduced production due to the great impact of the epidemic. Thanks to the advantages of domestic epidemic prevention and control, Chinese LED screen enterprises have seized the opportunity to expand production capacity, reduce costs and expand their leading advantages. In particular, the production capacity of mini / micro LED has become an urgent task for many led enterprises.Leyard Earlier, lyade publicly stated that the micro LED display mass production base was officially put into operation. It established a joint venture with Taiwan Jingyuan optoelectronics to set up Lijing microelectronics, the world's first micro LED display mass production base, which was also officially put into operation on October 29.ZhoumingOn November 3, Zhouming technology released information related to investor research, revealing that the industry began to pick up from Q3 and that the market continued to pick up. At the same time, on the production capacity layout of mini led, Zhouming technology disclosed that it is successively investing a large amount of funds for the upgrading of Huizhou Daya Bay industrial base as planned, and adding several Mini LED display intelligent production lines. In addition to the existing Mini LED production line, nearly 50% of the funds raised in the company's fixed growth plan will be invested in equipment in the field of mini ledTable sectionRecently, taibiao also publicly said that there are currently 9 factories in China and India, with a total of 200 SMT lines. In the mini led part, mass production is expected to start in January next year. Taibiao also invested large capital expenditure and R & D personnel.Hongli ZhihuiRecently, Hongli Zhihui announced a number of mini led investment projects. According to rough calculation, the total investment in the expansion projects announced by Hongli Zhihui this year will reach 3.65 billion yuan, and the planned annual output value will exceed 5.8 billion yuan. "As industry experts said, in the face of mini / micro led, the future display technology, China, as the most active region in the global display industry, is essential for new investment, various integration and mass production climbing of new production lines to maintain its global leading position. It is believed that with the further release of the HD display market, the investment of relevant enterprises in the mainland and Taiwan will continue to increase.Facing the upcoming Mini / micro led new display era, although China's LED display industry has leading advantages, we must also recognize our own shortcomings. Firstly, the current distribution of China's LED display industry is mainly concentrated in the southeast coastal areas. From the perspective of regional distribution, it is not conducive to the overall balanced development of the industry. Secondly, from the perspective of the overall brand pattern of the global industry, although China is in a leading position in terms of production capacity and market share, the brand influence of Chinese LED screen enterprises in the global market is still weak. Finally, there are still some weaknesses in China's LED display industry, such as relatively single technical structure and insufficient competitiveness of the whole industrial chain. In the future, we must learn from each other's strengths to make up for our weaknesses and give full play to the Industrial Synergy to continue to maintain our leading edge.Original title: [abison headlines] Mini / micro capacity demand broke out, and China's LED industry continued to leadThe source of the article: WeChat official account: LED display channel] welcome to add attention! Please indicate the source of the article.
Guangxiang Technology Rushes to the Gem and Plans to Raise 630 Million Yuan to Expand the Production Capacity of LED Display Screen
Guangxiang Technology Rushes to the Gem and Plans to Raise 630 Million Yuan to Expand the Production Capacity of LED Display Screen
Following xinruida, recently, two related enterprises in the LED industry plan to be listed on the gem. According to the CSRC, the gem IPO of Shenzhen Guangxiang Technology Co., Ltd. (hereinafter referred to as "Guangxiang technology") has entered the sprint stage, and the listing guidance of Shenzhen Ming Microelectronics Co., Ltd. (hereinafter referred to as "Ming microelectronics") has been completed.Founded in 2006, Guangxiang technology is headquartered in Shenzhen and has offices in Beijing, Shanghai and other cities. It is mainly engaged in indoor and outdoor full-color LED display screens and rental screens. At present, Guangxiang technology has a wholly-owned subsidiary, HK gloss limited , Guangxiang Hong Kong wholly controls glossine USA Inc and glossine B.V. the prospectus shows that Guangxiang technology plans to issue no more than 16.0875 million shares to the public, and no less than 25% of the total share capital of the company after this offering. This offering will raise 631 million yuan to invest in LED display expansion and other projects. In 2017, 2018 and 2019, Guangxiang technology achieved revenue of 589 million yuan and 7.7 million yuan respectively The net profit was 39.45 million yuan, 42.47 million yuan and 108 million yuan respectively. The revenue and net profit increased year by year. Among them, the sales revenue of LED display screen accounted for more than 98% in each year. In addition, the proportion of overseas sales in the company's main business revenue in each year was 37.20%, 43.36% and 44.49% respectively.According to the different pixel spacing of LED display screen, Guangxiang technology divides the display screen products into four categories: below P3, P3-P4, p4-p5 and above P5. At present, the company has built 6 LED display screen assembly lines.The raised funds will be used for 80000 square meters of mobile LED display expansion project, R & D and experimental center construction project, mobile LED display marketing network construction project and supplementary working capital project. Among them, 80000 square meters of mobile LED display production capacity will be added after the 80000 square meters of mobile LED display expansion project is completed. In addition, through the mobile LED display marketing network For the project, Guangxiang technology will establish media operation centers integrating office, exhibition, storage and after-sales in overseas countries or regions such as the East Bank of the United States, the West Bank of the United States, Italy, the Netherlands, the Middle East, South Korea, India and South Africa, as well as domestic cities such as Beijing, Shanghai, Wuhan and Chongqing.According to Guangxiang technology, all the investment projects of the raised funds belong to or serve the company's main business. The main purpose of the implementation of the raised investment project is to consolidate and expand the company's current main business, further expand the company's market share in the field of LED display screen and consolidate the advantageous position in the industry. Guangxiang technology said that in the future, the company will further break through small spacing, mini / micro led and different technologies For technical difficulties such as screen, expand production capacity, improve the automation and intelligence level of the production base, further optimize the production process and consolidate the advantageous position of the industry. At the same time, the company will expand the business model by virtue of the accumulated industry reputation and customer resource channel advantages. On the one hand, the company will horizontally broaden the product lines such as lighting and sound, and provide one-stop performance equipment and technical services; on the other hand We will vertically extend the industrial chain, carry out leasing services, establish regional media operation centers at home and abroad, promote and shape brand image, and reserve mobile LED display resources. On this basis, we will further meet the needs of customers in the field of culture and media, and establish a service network covering areas with intensive cultural and sports activities all over the world.Ming microelectronics has made a three-time sprint to the capital market, and the listing guidance has been completedMing microelectronics was founded in 2003, focusing on the research and development of power management, LED lighting and LED display driver chips. According to the counseling filing report, CSC securities and Ming microelectronics signed an agreement on January 15, 2020 Guidance agreement between Shenzhen Ming Microelectronics Co., Ltd. and CSC Securities Co., Ltd. on the initial public offering and listing of Shenzhen Ming Microelectronics Co., Ltd , submitted the counseling filing materials to Shenzhen regulatory bureau on January 17, 2020. On January 21, 2020, Shenzhen Regulatory Bureau officially accepted the counseling filing application. Up to now, the scheduled work plan has been completed. According to ledinside's previous reports, Ming microelectronics has sprint into the capital market twice, this is the third time. On January 12, 2011, Ming microelectronics officially accepted Guoxin Guidance on the listing of securities; on February 16, 2012, the CSRC announced that Ming microelectronics had terminated the review. The reason given by Ming microelectronics was that the performance in 2011 did not meet expectations and the market was not optimistic, so the company voluntarily withdrew its listing application. In June 2017, Ming microelectronics launched an IPO for the second time and planned to raise 457 million yuan to invest in the R & D and industrialization of a new generation of LED display driver chips , intelligent lighting processor R & D, industrialization and integrated circuit packaging projects. However, in February 2018, Ming microelectronics was approved for the second IPO.Ledinside viewLedinside believes that the new display is one of the main development directions of LED in the future. At present, it is only in its infancy. Guangxiang technology and Ming microelectronics are related enterprises. Guangxiang technology directly produces LED display products, while Ming microelectronics has also worked in the field of display driven IC for a long time and has a certain market position, which is one of the key development directions in the future. From the perspective of the industry, the two are The development directions of the companies are more in line with the development trend of the industry, and the market prospect is expected.
Analysis on the Difference Between LED Display Screen and LED Backlight
Analysis on the Difference Between LED Display Screen and LED Backlight
LED screen is by no means a common LED backlight. LED display screen is also called electronic display screen or floating word screen. It is composed of LED dot matrix and ledpc panel. Text, pictures, animation, video and content are displayed by turning on and off the red, blue, white and green LED lights. Different adjustments can be made according to the needs of different occasions. For example, the flowing calligraphy and paintings of general billboards are produced through flash, saved in a memory card of the display screen, and then displayed through technical means. They can be replaced at any time according to different needs. All components are display devices with modular structure. The traditional LED display screen is usually composed of display module, control system and power supply system.The luminous color and luminous efficiency of LED are related to the material and technology of making LED. At the beginning, the lamp ball is all blue light, but the phosphor is added behind it to adjust different light colors according to the different needs of users. There are four widely used colors: red, green, blue and yellow. Because the LED has low working voltage, can actively emit light and has a certain brightness, the brightness can be adjusted by voltage, and is resistant to impact, vibration and long service life (100000 hours), there is no other display mode to match the LED display mode in large display equipment.The display screen made of red and green LED chips or lamps together as a pixel is called monochrome or single primary color screen and tricolor or double primary color screen. The display screen made of red, green and blue LED chips or lamps together as a pixel is called tricolor screen or full-color screen. If there is only one color, it is called monochrome. The pixel size of indoor LED screen is generally 2-16mm. Several LED cores that can produce different primary colors are often packaged into one. The pixel size of outdoor LED screen is mostly 6-31.5mm. Each pixel is composed of several monochrome LEDs. The common finished product is called pixel cylinder, and the two-color pixel cylinder is generally composed of 2 red and 1 green, The three-color pixel cylinder is composed of 1 red, 1 green and 1 blue.LED screen is more suitable for people's work and lifeWhether the LED is used to make a monochrome, two-color or three-color screen, in order to display the image, the luminous brightness of each LED constituting the pixel must be adjustable, and the fine degree of adjustment is the gray level of the display screen. The higher the gray level, the finer the displayed image, the richer the color, and the more complex the corresponding display control system. Generally, for 256 gray level images, the color transition has been very soft, while for 16 gray level color images, the color transition boundary is very obvious. Therefore, color LED screens are currently required to be made of 256 to 4096 gray levels.The reason why LED has been widely valued and developed rapidly is inseparable from its own advantages. The development prospect of LED is very broad. It is developing towards higher brightness, higher weather resistance, higher luminous density, higher luminous uniformity, reliability and panchromatic.LED display has the characteristics of environmental protection, high brightness, high clarity and high reliability. At the last stage, the LED display market only met people's needs, but it can not meet the requirements in LED display products and the quality is not up to standard. With the development of LED display, now LED products have a new breakthrough. At least it is better than the previous stage. It has also developed a series of products completely different from traditional light source applications, which will be popular. LED display will have a larger and wider development space. LED display is not only beautifying, but also more appropriate to people's work and life.
Eight Factors Affecting the Design of LED Display Screen
Eight Factors Affecting the Design of LED Display Screen
LED display screen is widely used in public places. Most of the large screens in the square are LED screens, which have the characteristics of long service life and low energy consumption. If the design of LED display screen is inappropriate, it will affect the future use. This paper summarizes eight factors, which should be paid attention to in the design of LED screen:1. Heat dissipation designWhen the LED works, it will generate heat. Too high temperature will affect the attenuation speed and stability of the LED. Therefore, the heat dissipation design of PCB and the ventilation and heat dissipation design of the box will affect the performance of the LED.2. Mixed lampLEDs with different brightness levels of the same color need to be mixed, or inserted according to the lamp insertion diagram designed according to the discrete law, so as to ensure the consistency of the brightness of each color on the whole screen. If there is a problem in this process, the local brightness of the large screen will be inconsistent, which will directly affect the display effect of the LED large screen.3. Design current valueThe nominal current of LED is 20mA. Generally, it is recommended that the maximum use current should not exceed 80% of the nominal value. Especially for large screens with small point spacing, the current value should be reduced due to poor heat dissipation conditions. According to experience, due to the inconsistency of the attenuation speed of red, green and blue LEDs, the current value of blue and green LEDs should be reduced to maintain the consistency of white balance after long-term use of the large screen.4. Driving circuit designThe layout of the driving circuit board and driving IC on the large screen module will also affect the brightness of the LED. Because the driving IC output current is transmitted too far on the PCB, the voltage drop in the transmission path will be too large, affecting the normal working voltage of the LED and reducing its brightness. We often find that the LED brightness around the large screen module is lower than that in the middle, which is why. Therefore, to ensure the consistency of large screen brightness, it is necessary to design the distribution diagram of driving circuit.5. Control the verticality of the lampFor in-line led, there should be enough technology to ensure that the LED is perpendicular to the PCB when passing through the furnace. Any deviation will affect the brightness consistency of the set led, and color blocks with inconsistent brightness will appear.6. False soldering controlWhen the LED on the large LED screen is not lit, there is often more than 50% probability that it is caused by various types of false soldering, such as LED pin false soldering, IC pin false soldering, pin and bus false soldering, etc. The improvement of these problems needs to strictly improve the process and strengthen the quality inspection. The vibration test before leaving the factory is also a good inspection method.7. Over wave soldering temperature and timeThe temperature and furnace passing time of wave front welding must be strictly controlled. It is recommended that the preheating temperature is 100 5 and the maximum temperature shall not exceed 120 , and the preheating temperature rise shall be stable. The welding temperature is 245 5 , and the welding time is recommended not to exceed 3 seconds. Do not vibrate or impact the LED after furnace passing until it returns to normal temperature. The temperature parameters of wave soldering machine shall be detected regularly, which is determined by the characteristics of LED. Overheating or fluctuating temperature will directly damage led or cause hidden dangers of LED quality, especially for small-size circular and Oval LEDs such as 3mm.8. AntistaticThe LED large screen assembly factory shall have good anti-static measures. Special anti-static ground, anti-static floor, anti-static soldering iron, anti-static table pad, anti-static ring, anti-static clothing, humidity control, equipment grounding (especially foot cutting machine) are the basic requirements, and should be tested regularly with an electrostatic instrument. For more information, please continue to visit the LED display quotation of the industry information channel of China logo network.
LED Display Screen Has Become More and More Popular and Has Become One of the Important Display Windows
LED Display Screen Has Become More and More Popular and Has Become One of the Important Display Windows
There is no doubt that in the process of global economic ups and downs and industrial development and Reform in recent decades, China's LED display industry has walked out of a new path of "self-development, self driving and self guidance" with its courage, strength and endurance, and finally won the dominant position of the global LED display industry.1 China speedIn 30 years, we have completed the road of 50 or even 70 years of the same industry in other countries, which is the speed of China's LED display industry!At the same time, the speed of China's LED display industry is not only reflected in the "rapid development and rise" of production scale, but also in the learning speed of a series of new technologies, new models and new ideas "from reference to independent innovation". In the early stage of development, subject to the limitations of imperfect industrial chain, lack of experience of industrial workers and imprecise production and manufacturing process, China's LED display screen really belongs to "barbaric growth". However, after years of quality revolution within the industry and consumption upgrading in the terminal market, China's LED display manufacturing and innovation has led the global industry.2 Industrial Cluster"The world's LED display manufacturing looks at China, and China's LED display manufacturing looks at Shenzhen". A complete industrial chain of LED displays from raw materials, lamp beads, chips, packaging and supporting design has been formed in Shenzhen, China, as well as industrial clusters applied in various subdivided fields. At the same time, driven by policies and market demand in recent years, it has also been in Jiangxi, Fujian and other places, The establishment of new industrial bases and clusters has promoted the rapid development of LED display industry.From the LED display manufacturing in the midstream to the core components in the upstream and then to the channel retailers in the downstream, it can be said that China's LED display industry has established a terminal oriented "user-centered" market-oriented operation system and forced mechanism, forming a vertical integrated industrial layout covering all categories, so as to achieve faster speed and higher efficiency, Lead the innovation of LED display technology and products in the world.3 Scale costCompared with foreign enterprises, Chinese LED screen enterprises can produce LED display products with the same quality and performance at only half the cost. This is not cutting corners and shoddy goods, but based on China's complete industrial chain, efficient operation and management level, low labor cost and a series of advantages.Until today, although the cost advantage of LED display manufacturing in China is lower than before, China still has a great leading advantage compared with the world. Driven by the unique "scale cost" advantage of Chinese LED screen enterprises, LED display has become more and more popular and has become one of the important display windows.
How to Effectively Prevent Aging of LED Display Screen and What Are the Prevention Methods
How to Effectively Prevent Aging of LED Display Screen and What Are the Prevention Methods
LED display advertising media also has the characteristics of high effective arrival rate. Compared with media placement forms such as TV and newspaper, the price of LED display screen is relatively low. These unique values make the full-color LED advertising screen media naturally become the upstart of outdoor media. Different from traditional outdoor media, full-color LED display is not only pure outdoor media. It also has the characteristics and advantages of television and other media. It has greater creative space and broad space for interaction and communication with consumers. It is a unique form of screen, which can meet personal needs, and has the communication concept of the digital age.We often encounter such problems when using LED display. The LED display screen can work normally at the beginning of the product, but after a period of time, there will be dim lights, flickers, faults, intermittent lighting, etc., which will seriously damage the product. According to the introduction of Shenzhen LED display manufacturer Dayuan intelligent, the reasons for this phenomenon are as follows:1. When using LED display screen, the welding process has the problems of high welding temperature, long welding time and inability to prevent static electricity. More than 95% of these problems are caused by the packaging process.2. There is a problem with the quality of the LED display itself or the production process.Preventive methods1. Control the welding process.2. Conduct aging test on the product.Aging is not only an important guarantee to ensure the reliability of electronic products, but also an essential step in product production. LED products can improve the performance after aging and help to maintain stable performance in future use. The aging test of LED display is a very important link in product quality control, but it is often ignored and can not be aged correctly and effectively. Led aging test is a countermeasure taken according to the characteristics of product failure rate curve to improve product reliability, but this method is not necessary. After all, aging testing sacrifices the life of a single LED product. pay the price.Led aging methods include constant current aging and constant voltage aging. A constant current source means that the current is constant at all times. There is a frequency problem, not a constant current. That is, AC or pulsating current. An AC or pulsating current source can be designed to have a constant RMS, but this power source cannot be called a constant current source. Constant current aging is not only the feature of LED current operation, but also a scientific led aging method. Overcurrent impact aging is also a new aging method adopted by Shenzhen LED display manufacturers. This aging is carried out by using a constant current source with adjustable frequency and adjustable current, so as to judge the quality and expected life of LED in a short time, and identify many hidden dangers that cannot be found by traditional aging.fqj
Four Methods for Prolonging the Service Life of Outdoor LED Display Screen
Four Methods for Prolonging the Service Life of Outdoor LED Display Screen
In midsummer, the weather with high temperature and rainfall gradually increases. Typhoons are frequent, especially thunder and lightning. Outdoor advertising LED display has relatively high requirements for the use environment. Considering that the outdoor LED display may be affected and damaged by high temperature, typhoon, rainstorm and lightning weather, in addition to the need for a comprehensive response plan, what are the precautions for the installation of outdoor LED display in order to improve its service life?1 High temperature protection. The outdoor LED display screen usually has a large area, which consumes a large amount of power in the application process, and the corresponding heat dissipation is also large. In addition, the external temperature is high. If the heat dissipation problem can not be solved in time, it is likely to cause problems such as heating and short circuit of the circuit board. In production, ensure that the display circuit board is in good condition, and try to select the hollow design in the shell design to help heat dissipation. During installation, it is necessary to adhere to the condition of the display screen and good ventilation according to the condition of the device. When necessary, heat dissipation equipment shall be added to the display screen, such as adding an air conditioner or fan to help the display screen heat dissipation.2 Typhoon prevention. The installation positions and methods of outdoor LED display screens are different, including wall mounted, inlaid, column type, hanging type, etc. Then, in the typhoon season, in order to keep the screen body of outdoor LED display screen from falling, there are strict requirements for the load-bearing steel frame structure of display screen. The engineering unit must design and install in strict accordance with the standard of typhoon resistance level, and also have a certain seismic capacity to ensure that the outdoor LED display will not fall, causing casualties and other hazards.3 Prevent rainstorm. There are many rainy weather in the south, so the LED display screen itself must have a high waterproof protection level in order not to be eroded by rain. In the outdoor use environment, the outdoor LED display shall reach the protection grade of IP65, the module shall be sealed with glue, the waterproof box shall be selected, and the module and the box shall be connected with waterproof rubber ring.4 Lightning protection. The impact of lightning on the display is fatal. If it is struck by lightning, the display will be seriously damaged. Therefore, the outdoor LED display must be installed with lightning rod and lightning protection equipment, grounded, and the distribution box shall be installed on the lightning protection device, and then grounded to protect the safety of the outdoor LED display.It is suggested that the production, construction and user units should take measures to prevent or reduce the damage of the display screen.
Scanning Mode and Principle of LED Display Screen_ What Does the P of LED Display Stand For
Scanning Mode and Principle of LED Display Screen_ What Does the P of LED Display Stand For
Scanning mode and principle of LED display screenWith the rapid development of LED display industry, LED technology is also developing continuously. The brightness of LED display screen is also improving, and the size is getting smaller and smaller, which indicates that more LED display screens will enter the room. However, the improvement of LED brightness and density brings new and higher requirements to the control and drive of LED display. At present, the general control methods of indoor LED display screen adopt row column split control mode, which is commonly referred to as scanning mode. At present, the driving modes of LED electronic display screen include static scanning and dynamic scanning. The static scanning surface is divided into static real pixels and static virtual, and the dynamic scanning is also divided into dynamic real image and dynamic virtual.In the LED display screen, the ratio of the number of rows lit at the same time to the number of rows in the whole area is called scanning mode. The scanning is also divided into several driving modes, such as 1 / 2 scanning, 1 / 4 scanning, 1 / 8 scanning and 1 / 16 scanning. In other words, if the driving mode of the display screen is different, the setting of the receiving card is also different. If the receiving card was originally used for 1 / 4 scanning evaluation and is now used on the static screen, the display of the display screen will be bright every four lines. Generally, the receiving card can be set. Connect the sending card, display screen, computer and other main devices. You can enter the relevant software in the computer for setting. Here, let's introduce the scanning mode and principle of LED display screen.1. LED display screen scanning mode(1) Dynamic scanning: dynamic scanning implements "point to column" control from the output of driving IC to pixel points. Dynamic scanning requires control circuit, and the cost is lower than static scanning, but the display effect is poor and the brightness loss is large.(2) Static scanning: static scanning implements "point-to-point" control from the output of driving IC to pixel points. Static scanning does not need control circuit, and the cost is higher than dynamic scanning, but it has the advantages of good display effect, good stability and small brightness loss.2. Working principle of 1 / 4 scanning mode of LED displayThe working principle of 1 / 4 scanning mode of LED display screen is that each line of power V1-V4 is turned on for 1 / 4 of the time according to the control requirements within 1 frame of image. The advantage of this is that it can make more effective use of LED display characteristics and reduce hardware cost. Its disadvantage is that in one frame of image, each line of LED can only display 1 / 4 of the time.3. Classification according to LED display type and scanning mode(1) Scanning mode of indoor full-color LED display: P4 and P5 are constant current 1 / 16, P6 and p7.62 are constant current 1 / 8.(2) Scanning mode of outdoor full-color LED display: P10 and p12 are constant current 1 / 2 and 1 / 4, and p16, P20 and P25 are static.(3) The scanning mode of single and dual color LED display screen is mainly constant current 1 / 4 scanning, constant current 1 / 8 scanning and constant current 1 / 16 scanning.What does the P of LED display stand forIn the LED display screen, P refers to the center spacing of two adjacent pixels of the LED display screen, referred to as point spacing for short.1. For example, for a P10 LED display screen, the center distance between two adjacent lamp beads and lamp beads is 10mm2. When P10 is 10 meters away, you can't see the particles on the screen, that is, you can't see the lamp beads. Similarly, when P6 is 6 meters away, the picture is not distorted.3. Under normal circumstances, the denser the lamp beads, the clearer the LED display, the higher the resolution and the higher the price.Wonderful reading recommendations:Application place of LED display screen_ Development status and trend of LED displayWhat is the power consumption of LED display_ How to connect LED display screen with mobile phoneHow to change words with U disk for LED display screen_ Steps of importing subtitles with U disk for LEDWhat are the components of LED display_ Application method of LED display screenHow long is the service life of LED display_ Six daily maintenance of LED display
About the Manufacturing Methods of Spherical LED Display Screen, There Are Roughly These Kinds
About the Manufacturing Methods of Spherical LED Display Screen, There Are Roughly These Kinds
The emergence of LED electronic display screen not only brings great convenience to our life, but also adds color to the city. With the continuous improvement of LED display technology, the design of LED display is more artistic and beautiful. LED displays of various shapes such as "wavy" and "spherical" appear. Spherical LED display screen is a fashionable, beautiful and flexible LED display screen product newly developed in recent years. It is different from the process and technology of ordinary LED display screen.Maipu brilliant spherical LED display screen is divided into two types in production: the first is the whole spherical LED display screen. Generally, such a ball is relatively small, with a diameter of about 2 meters, which can watch the whole from a close place; The second is hemispherical LED display. Generally, such a ball is relatively large and needs to be viewed from a distance.The manufacturing methods of spherical LED display screen are roughly as follows:1. For the outdoor spherical LED display with large diameter, it can be done in the way of single pixel cylinder. The ball is cut according to the latitude, and a row of LED pixel tubes are placed at each latitude.2. For the indoor spherical LED display screen with small diameter, the surface paste three in one LED lamp can be used, and the flexible PCB board can be used to make a point by point controllable lamp belt, and then the lamp belt, like the first form, surrounds the sphere according to latitude.3. For indoor screen, special LED unit board can also be designed according to point spacing. The special-shaped unit board can be designed into a triangle for splicing or a 6-sided shape for splicing (just like making a football, it is composed of multiple 6-sided shapes). The models of indoor LED spherical screen include P4, P5, P6, P10 and other models.fqj
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