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" control room?
Imminent threat <br> <br> small spacing LED display from a market debut attracted a lot of attention and rapid development, with sales in 2012 to more than 200 million yuan, in 2013 it is to reach more than 8 million full Turned over 4 turns. 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 occupied area and low color saturation. However, with its advantage of almost zero stitching below 0.5mm, it still dominates the control room market.
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 accounted for 12% of the market share of the large-screen splicing market. With the rapid reduction of the spacing, the LED has the possibility of displaying a more detailed picture, and without the characteristics of visual seams and good color brightness consistency, the LED industry has begun to consider entering the control room with long-term "control" by the DLP wall. Show the market.
The advantages of small pitch LEDs applied to the control room are obvious. The first is seamless splicing, the LED can be almost infinitely spliced ​​according to the demand and there is no visual seam, the picture is complete and free to divide; 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, seriously affecting the display effect, or a display unit is broken, the replacement of the new unit and other display units have significant differences 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.
Still inadequate <br> <br> face of menacing small spacing LED, DLP vendors have also introduced some small spacing LED products to counter it with traditional DLP product lines complement each other. 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.
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-bright high-gray" 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.
The current implementation of "low-light high-ash" still has considerable difficulty. 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. After (current), the diode begins to conduct electricity, and the LED of the LED begins to gradually illuminate. 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 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-bright and high-ash†small-pitch LED screens on the market. When the brightness is reduced to 200 cd/m2, the gradation loss is not large. The picture quality is better restored, but whether it can withstand long-term use is still to be verified by the market.
Imminent threat <br> <br> small spacing LED display from a market debut attracted a lot of attention and rapid development, with sales in 2012 to more than 200 million yuan, in 2013 it is to reach more than 8 million full Turned over 4 turns. 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 occupied area and low color saturation. However, with its advantage of almost zero stitching below 0.5mm, it still dominates the control room market.
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 accounted for 12% of the market share of the large-screen splicing market. With the rapid reduction of the spacing, the LED has the possibility of displaying a more detailed picture, and without the characteristics of visual seams and good color brightness consistency, the LED industry has begun to consider entering the control room with long-term "control" by the DLP wall. Show the market.
The advantages of small pitch LEDs applied to the control room are obvious. The first is seamless splicing, the LED can be almost infinitely spliced ​​according to the demand and there is no visual seam, the picture is complete and free to divide; 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, seriously affecting the display effect, or a display unit is broken, the replacement of the new unit and other display units have significant differences 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.
Still inadequate <br> <br> face of menacing small spacing LED, DLP vendors have also introduced some small spacing LED products to counter it with traditional DLP product lines complement each other. 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.
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-bright high-gray" 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.
The current implementation of "low-light high-ash" still has considerable difficulty. 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. After (current), the diode begins to conduct electricity, and the LED of the LED begins to gradually illuminate. 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 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-bright and high-ash†small-pitch LED screens on the market. When the brightness is reduced to 200 cd/m2, the gradation loss is not large. The picture quality is better restored, but whether it can withstand long-term use is still to be verified by the market.
Xinxiang Mina Import & Export Co., Ltd. , https://www.mina-motor.cn