Explore small-pitch LED "control" control room

Small-pitch LEDs have been displayed in the hot indoors market in 2012. Today, LEDs not only do not mean to go, but also the trend of the stars, the depth of commercial display, conference display, security monitoring and other aspects, even the demanding requirements The high-end control room was also not spared. Many industry concerns, long-term DLP wall in the control room display system's dominance is to give way to small-pitch LED, which will become the new overlord of the control room? The threat to approach the small-pitch LED display has attracted a lot of attention and rapid development since its appearance in the market. Sales exceeded 200 million RMB in 2012, and in 2013 it reached more than 8 billion, and it has turned over 4 times. The technology is also constantly surpassing. In 2012, the P2.5 LED screen entered the market and opened the small pitch era. In 2013, new products such as P2.0, P1.8, P1.5, P1.4, and P1.2 emerged in an endless stream, and the records were continuously refreshed. Products with smaller pitches such as P1.0 and P0.8 are also produced and brought to market. The emergence of smaller pitch LEDs means that its application market is also more extensive. In the past, it was only possible to pray and high-level display in the control room, and now it can be truly touched. For many years, the control room market, as the pyramid-high-end market of the large-screen display market, has long been dominated by DLP wall-mounted walls. Although it has been repeatedly impacted by display products such as LCD and PDP splicing, its position is still stable. Cai San, director of the market in Chau Ming, said that although LCD has been working hard to reduce seams in the past few years, the smallest LCD patch on the market has reached 3.5mm, but there are still obvious stitching marks. This kind of screen cutting is not conducive to the control room. Refined display of market figures and graphic signals. PDP patchwork is slightly smaller, between 1mm and 4mm, which is also not conducive to the fine display of digital and graphic signals. In addition, PDP shows that the static picture is easy to burn, and the energy consumption is high, basically more than 2 times of the LED display. After a while, the brightness is attenuated by half. DLP wall has the disadvantages of large area and low color saturation, but it still dominates the control room market with its advantage of almost zero seams below 0.5mm. When the small-pitch LEDs first appeared at the sharp corners, the DLP industry did not regard it as a competitor. In fact, even the LED industry did not expect to start a short-term connection with DLP. Small-pitch LEDs were initially positioned to compete with LCDs, PDPs, and projections, and in fact did make a big difference. Statistics show that in 2013, small-pitch LEDs occupied 12 market shares in the large-screen splicing market. With the rapid reduction of the spacing, LEDs have the possibility of displaying more detailed images. At the same time, there are no visual seams and good color brightness consistency, so LED manufacturers are beginning to consider entering the large-screen display market of control room controlled by DLP for a long time. . Lianjian Optoelectronics, Liard, Chau Ming and other LED listed companies have started the process of small-pitch LEDs entering the control room. Of course, companies that are optimistic about this market and ready to test water are not rare in the industry. The advantages of small pitch LEDs applied to the control room are obvious. Yuan Zheng, manager of the Joint Optoelectronics Planning Department, said: The first is seamless splicing. The LED can be almost infinitely spliced ​​according to the demand without visual seams, the picture is complete and freely divided; secondly, the color and brightness consistency are good. Compared with DLP, LCD and other splicing screens, the color and brightness consistency of small-pitch LEDs are obvious, and can be corrected point by point on the spot after installation, so that each pixel emits light uniformly. DLP stitching will appear obvious after a period of time, commonly known as patching phenomenon, which seriously affects the display effect, or a display unit is broken and the new unit after replacement is significantly different from other display units in color and brightness. Liquid crystal splicing also has dark edges, black corners, etc., and it is irreversible and cannot be repaired; again, the LED can be adjusted from 2500K to 10000K color temperature and wide area, wide color gamut, restore true color, can be used for color requirements. Accurate industry; in addition, high gray levels, high contrast and high refresh rate, LEDs have better performance, better response, faster response and zero noise. These features have led more and more users to consider the use of small-pitch LEDs, in fact, it is indeed gradually replacing some of the DLP splicing market. Over the years, TrueVision has been focusing on AV engineering construction and is able to get real feedback from customers. Wang Huijuan, general manager of the multimedia application division, told reporters that in the past two years, the proportion of customers requesting the use of small-pitch LEDs has been on the rise. In the display of large halls in 2013, more than 80% of customers will require LED screens as one of the solutions. Comparison of selection and selection; monitoring and production scheduling control room will be more cautious, about 30% of customers will consult the feasibility of using LED large-screen solutions, this year has increased. In this good situation, LED manufacturers are excited and full of confidence. Li Changjun, deputy general manager of Liard, said that LED small pitch will gradually replace DLP's mid-to-high-end market and LCD high-end market, with the technology maturity and cost of LED small pitch. The decline will replace DLP and LCD to a greater extent. There are still some shortcomings in the face of small-pitch LEDs. Some DLP vendors have also introduced small-pitch LED products to deal with them, complementing the traditional DLP product line. Some believe that LEDs are insufficient, and it is difficult to shake DLP's dominant position in the control room. Traditional control rooms need to display rich and complex signals, digital signals are more than video signals, and operators continue to watch large screens for a long time, thus placing nearly stringent requirements on products and technologies. Such as high-resolution refinement display, high gray scale reduction display under low brightness, high refresh rate, high consistency and uniformity, low noise, low heat dissipation, etc., even for the comfort of long-term continuous viewing Very high demand. These requirements set a high threshold for small-pitch LEDs to enter the high-end control room market. Kong Xiangxu, manager of Shandahua’s pre-sales support department, said. Generally speaking, small-span LEDs per square meter require dozens of power supplies, hundreds of printed circuit boards, hundreds of thousands of pixels, and millions of LED beads. The reliability of such components cannot be guaranteed. The 3/10000 runaway point means that there are problems with hundreds of pixels per square meter. How to reduce the dead light rate is the primary problem facing small-pitch LEDs. At the same time, each pixel of the small-pitch LED is composed of independent light-emitting devices, the consistency is not easy to adjust, and the aging characteristics of each pixel point are different, and need to be adjusted frequently. The LED display box is made up of different modules. The flatness of the box and the gap between the modules and the dimensional tolerance of the box itself and the cumulative assembly tolerance have a great influence on the assembly effect of the high-density display. Sex and chromatic aberration are cumulative defects in LED device differences, IC current differences, circuit design layout differences, and assembly differences. There is a big gap between the fineness and DLP's 10um large-scale CNC machine tools and laser cutting. In the era of big data, huge and complicated data, complex and variable input signals, how to achieve seamless interface between the screen and the splicing system also puts high demands on the small-pitch LED display entering the high-end control room market. At the same time, the high color reproduction of the DLP display unit is unmatched by LED technology. In the comfort of long-term continuous viewing, the DLP display unit wins the small-pitch LED display. LED manufacturers do not deny and admit that there are problems with DLP manufacturers' low resolution, high brightness, poor viewing comfort, insufficient stability, and high price. LED display with a dot pitch of 2.5mm, showing a required area of ​​2K resolution of 13.82m2, which is unacceptable in many high-end control rooms. If the 0.8mm LED display with the smallest dot pitch is used, a 2K resolution is displayed, and the required area is 1.38m2. Although the requirements of some control rooms are satisfied, the cost caused by the narrowing of the dot pitch is drastically increased. Many manufacturers are discouraged. Chau Ming Cai said. In fact, not only the cost, but also the higher the resolution, the narrower the dot pitch, and the higher requirements for heat dissipation, life, color consistency, maintenance, etc., it is not easy to solve. High brightness used to be one of the main advantages of LEDs, because it was mainly used outdoors, and its high brightness makes its display images visible in remote places in natural light. In the room, such brightness will not only be Causes uncomfortable viewing and can damage the user's vision for a long time. Of course, the LED can adjust the brightness, but when the brightness is reduced, the gray level is also lost, so that the picture quality is degraded. Therefore, low-light and high-ash has become a threshold that LED manufacturers must cross into high-end display applications. The comparison of small-pitch LED screens is no longer compared with who has higher brightness, but who can reduce the brightness without losing grayscale and image quality. At present, there is still considerable difficulty in realizing low-light and high-ash. The first LED is a light-emitting diode. Since it is a semiconductor diode, it can not escape the basic orientation of the diode. It has a threshold voltage, and only the voltage on the loading diode exceeds the threshold voltage (current After that, the diode begins to conduct electricity, and the LED is gradually illuminated. The fatal part is that the starting area is nonlinear and uncontrollable. Yuan Jian Optoelectronics Yuan Zheng believes that the real solution to low-light and high-ash is not only to reduce the LED current, but also has a long way to go. Recently, despite the efforts of mainstream manufacturers such as Chau Ming and Liard, there have been low-gloss, high-gray small-pitch LED screens on the market. When the brightness is reduced to 200 cd/m2, the gradation loss is not large. Good quality is restored, but it can still be verified by the market if it can withstand long-term use. From this point of view, focus on solving low-light and high-gray, solving system access and control display supporting multi-signal and complex signals, seamless seam and high-speed correction, reducing dead light rate and ensuring the stability of the screen. Continued improvement and improvement in technology will be the focus of future development of manufacturers such as Liard, Chau Ming and Lianjian Optoelectronics. The non-dominant market control room is a high-end market with large screen display, and its overall market share is not large. Small-pitch LED manufacturers do not seem to want to use it as the main market, and there are still many technical problems to be solved. As Shan Dahuate Kong Xiangxu said, although the technical problem is not a problem, but the actual operation level is not completed overnight. In practical applications, the technical level is directly linked to the practical value of the product, and it is difficult to obtain widespread recognition in the control room market until the application effect expected by the industry users is achieved. In this case, why not play the advantage and meet the diversified application needs of the market, this is the way to development. In order to meet the diversified needs, Liard's small-pitch LED has been integrated with 4K, naked-eye 3D and other trend elements. Lidru Lujun said that the application of small-pitch LED products in indoor public places will become more frequent in the next two years, especially by highlighting The color and seamless advantages will be favored by the relevant fields of product form display. At present, in small applications such as monitoring rooms, large conference centers, and control rooms, small-pitch LEDs have made great progress. Chau Mingcai believes that DLP will still occupy the main share of the control room in the next two years. With the continuous decline of cost and the continuous upgrading of technology, the small-pitch LED will further narrow its distance into the high-end market of the control room. In addition, with the rise and growth of the emerging civilian commercial market, products such as small-pitch LED TVs have been quickly recognized, which will accelerate the development of small-pitch LEDs. Yuan Jian Optoelectronics Yuan Zheng said that small-pitch LEDs will not stick to the control room, and the space in the high-end indoor display market is huge, especially the high-end conference, command and control market that used high-brightness DLP professional engineering projections, which is easy to be small. The pitch LED display is broken. In addition, for applications that do not require high-resolution maps or engineering drawings, such as various image projects, background walls of radio and television industry, commercial brand display, public information display, intelligent transportation and other application fields, its impact is also very strong. DLP manufacturers do LEDs without a future? The rapid development of small-pitch LED screens has made traditional DLP manufacturers feel stunned, worried and even resisted and feared. In order to maintain the market and resist the attack of LED manufacturers, some DLP manufacturers have also begun to introduce small-pitch LEDs. DLP manufacturers do not have a future LED. The photo of Yuan Jian Optoelectronics Yuan Zheng is amazing, but he said that there is a reason for this. Yuan Zheng believes that the integration ability of DLP manufacturers is a strong point. Most small and medium-sized DLP team walls can be purchased as long as the movement, screen and processing custom cabinets are combined. The rest depends on each person's capital (scale) and sales ability. This is especially true for liquid crystal and plasma splicing. When the small-pitch LED display just appeared, the traditional DLP manufacturers are actually eager to try, thinking that with the original take-up, the small-pitch LED display will be OEM, so they are brewing their own brand of small-pitch LED display , but

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