Small-pitch LED display enters the high-end market
July 15 13:04:05, 2019
According to industry insiders, in the next five years (2014-2018), the market growth of small-pitch LED display products will reach 110. However, small-pitch LED displays still face many problems, and the technical problems are not completely broken. . I remember the world's largest spliced ​​display at the 2010 Shanghai World Expo, which shocked the world. In recent years, with the continuous improvement of display technology, people have brought more perfect and stunning visual enjoyment. First, small-pitch LED enters the high-end market. Small-pitch LEDs show the market from the 2012 hot indoors. Nowadays, LEDs not only do not mean to go, but also the power of the stars, deep into commercial display, conference display, security monitoring, etc. From the perspective, even the demanding high-end control room has not been spared. The small-pitch LED display 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 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. Although LCD has been working hard to reduce seams in recent 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 fineness of digital and graphic signals in the control room market. display. 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. Second, why is the small LED so popular? Small-pitch LED screens are used primarily in commercial applications such as corporate conference rooms, chairman offices, online video conferencing, schools, and educational institutions. With its high brightness, no seams, light and flexible, and small footprint, it is a place to attract them. Every time the inquiry is made, the customer will ask for a small-pitch LED display as one of the options for comparison. The small-pitch LED display is a collective name for a complete set of high-end systems. It is also a summary of advanced commercial grades, including LED display systems, high-definition display control systems, and heat dissipation systems. The process is also very demanding in the production process. The small-pitch LED display is also a good name for the fine picture quality, which promotes the process of expanding the LED display to the indoor application field, and the market continues to heat up. The small-pitch LED display turned out to defeat the LCD screen, because the LCD display needs to be solved by splicing, but no matter how good the splicing technology, it can not solve the gap problem. Third, the high-end LED display favors the black light. In addition to the LED display to achieve a better display effect, many use black light. The reason is that the LED display performance, the higher the fidelity, the better the performance of the display, and the quality of the fidelity is mainly determined by the two indicators of the contrast and color of the image (the greater the contrast, the better) The more colors, the better.) Contrast refers to the measurement of different brightness levels between the brightest white and the darkest black in the dark and dark areas of an image. The larger the difference range is, the larger the contrast is. The smaller the difference range is, the smaller the contrast is, the higher the contrast is. Display vivid, rich colors to support all levels of color. The LED display with black crystal device can increase the contrast by 40. The display surface of the display with black light can display images with uniform color, vibrant and deeper colors. In addition to the high contrast, the black light brings another high-quality performance, that is, it is not reflective. Because the PPA bracket in the black LED lamp bead is black, since black does not reflect light, that is, there is no reflection ability, the light is converted into other energy (such as heat) on the black object, so even when there is stray light When the black PPA bracket absorbs all of it, it no longer reflects the stray light, thus reducing the interference of stray light, making the color more realistic, without cross-color, tailing and mutual interference of colors. Phenomenon, make the color more pure, clear, and more realistic. Fourth, small-pitch LED encounters technical bottlenecks According to industry insiders, in the next five years (2014-2018), the market-scale compound growth rate of small-pitch LED display products will reach 110. But small-pitch LED displays still face many The problem, the technical problem has not completely broken. On the whole, the current difficulties encountered in R&D and the bottlenecks that have not been broken are mainly concentrated in the following points: (1) Low-light and high-gray is different from outdoor display, which requires high brightness, refresh rate and energy saving. Indoor display needs to reduce brightness. . The optimal brightness of the small-pitch LED display entering the room is around 200 cd/m2. However, if the brightness is reduced, the gradation loss is caused, and then it needs to be completed by technical supplement. Now, in addition to Shige Guangxu, only a few manufacturers can achieve low-light and high-ash at the same time, and most manufacturers do not have this technology. (B) Match the standard resolution of the signal source for outdoor playback to select the appropriate content, which can match the resolution of the LED display. Unlike outdoor displays, indoor display sources have certain criteria. Therefore, for the manufacturer, the indoor signal source cannot be adapted to the resolution of the LED display screen, but the indoor signal source needs to be adapted to the design and guarantee of the corresponding resolution to meet the user's needs. (3) System access and display control supporting multi-signal and complex signals Compared with outdoor display signals, indoor display features multi-signal access and complex signal access. In research and development, it was found that multi-signal access through a simple split screen scheme would reduce the input signal standard. Therefore, how to solve the problem of multi-signal and complex signal access, also requires the manufacturer's small-pitch LED display to have good technical support. (4) Small-pitch LED screen display effect problem Compared with the general display screen, the dot pitch becomes smaller, and there will be problems such as afterglow, darkness, low gray reddish and low gray unevenness, which requires a small-pitch LED display to be considered. And solve it to meet the demand. (5) Seamless seaming, high-speed correction, stable undead lights Small-pitch LED display The biggest advantage is seamless, but the installation requirements are very high when the box is spliced. For the LCD screen, there is no problem with even seams, and the seams are not obvious. However, the small-pitch LED display can't be like this. If the modules are too tightly packed during installation, bright lines will appear, and when the module gap is large, dark lines will appear. And on the lamp beads, the industry standard is that the dead light rate is 1/10000, but the small pitch is not good. If there is a 1/10000 dead light, the picture cannot be seen. In the future, only the dead light rate will be controlled to 1/100,000, or even 1/1000000 to meet the requirements of indoor use. V. Summary In the field of security, the biggest advantage of small-pitch LED displays is their complete seamlessness and the natural reality of display colors. At the same time, in the aspect of post-maintenance, the LED display has a mature point-by-point correction technology. The display can be used for one-time correction of the whole screen using the display for more than one or two years. The operation process is simple and the effect is good. At present, the small spacing of LEDs is actually applied in the fields of monitoring security, command and dispatch, and intelligent transportation. In the future, LED small-pitch display will be further reflected if it can make greater breakthroughs in HD and intelligence.
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