Hubei ruiyate Automobile Co.,Ltd , https://www.ruiyate-automobile.com
First, the control room's big screen usage scenarios <br> <br> control room display required information is not point scale, and does not allow the bad points are bigger and the main control room data show that in general do not use video or image display, So each pixel is clearly shown as necessary. Therefore, in the control room application process, if the display screen has a bad point, it will not be recognized as a professional product. In the control room, the scale of the combination of display screens can be composed of dozens to hundreds of projection boxes. If you use 10 full HD screens, the number of small-pitch LEDs will consist of 20 million RGB LEDs. This is a huge number of components. In the theory of system reliability, each component has its own probability of damage, and the reliability of components is poor. Based on this theory, we can predict that the probability of dead lights for small-pitch LED screens is very high. At present, the Chinese government regulates that outdoor LED screens can accept dead lamp rates between one ten-thousandth and three. This one-tenth cannot be used at all in the control room. If we assume that the indoor small-pitch LED has ten times better reliability, it can only reach one hundred thousandth. Looking at the number of 20 million LEDs, there are nearly two hundred chances of dead lights in the entire film. This number of dead lights cannot be tolerated in a professional control room. DLP projection splicing large screen industry, Ti factory DMD component specifications are no dead pixels.
Second, the control room 7x24 endless operation throughout the year 7x24 operation of the display equipment, especially the pressure, so the equipment reliability requirements are particularly high. Compared to commercial displays, there are at least off-time breaks every day that allow equipment and components to release pressure. Therefore, it is not suitable for commercial use equipment, and it does not necessarily stand the test of 7x24. Such as the narrow side LCD display, the original factory is recommended to use no more than 20 hours a day, let the component rest to release the pressure, reduce the rate of deterioration of the picture. However, DLP has been used in the control room for more than 20 years and has passed the rigorous 7x24 test. However, the market time for small-pitch LED screens and their application in the control room are not long enough.
Third, the control room staff to watch large screen for a long time
The interaction between the staff and the big screen takes a long time to watch, so there are special requirements for the display screen. The picture quality must be soft, without glare, and the brightness should not be too bright to protect the health of the eyes. The small pitch LED screen is not a seamless magic, in fact, it is full of seams, but can not see the uneven seam when stitching. It is a tiny light-emitting space ratio (light-emitting point only accounts for about 1/10 of the area of ​​the component), in exchange for stitching looks seamless, and its side effects are obvious grainy. It is easy to feel uncomfortable visually and is not suitable for close-up viewing. The visual effect of the small-pitch LED screen is different from that of the DLP projection, it is obviously glare, and the brightness is not easy to be small. If the brightness of the LED is reduced, there will be ghosting, poor visual effects such as dark lines in the first line, low gray color casts, uneven grays, and gradient dark lines. The long-term and long-term viewing on a daily basis, the impact on the human eye to be observed. The application of the control room emphasizes the amount of information. All display information can be quickly determined at a glance, so the display size and number of portrait points are all required specifications. Can't use zooming to hard-wire high-quality information to lower-resolution displays. However, at present, the number of pixels of a small-pitch LED screen is not consistent with the signal source, and signal scaling will be performed.
Fifth, the same pixel resolution, DLP wall installation costs lower
Small pitch LED screens have the same technical resolution as DLP. But we need to examine its commerciality from a cost perspective. The price of a DLP Full HD 70†box is about RMB 80,000 to RMB100,000. This year's P1.9 LED screen with a small pitch is priced at RMB 30,000 per square meter. Estimated to be the same resolution as DLP, the cost is estimated It costs RMB 220,000, which is about 2.2-2.7 times, and the area demand is 5.5 times that of DLP, which means that in addition to the increase in costs, there is still a lot of space to install, and the additional funding is huge. The downward trend in the price of screens can be expected, is that so? The cost of LED screens can be divided into material and labor costs. The LED single chip and patch cost account for the most part. From the LED side, according to the upstream component manufacturers, there is almost no Profit, it is difficult to cut prices and continue to spend money on new component development.If the component is further reduced, the yield rate will decrease and the cost will increase.The other is the patch cost, which is a labor cost. When the labor cost rises, almost no There may be room for price cuts, so dividends that are expected to cut prices can only be released from small-pitch LED screen makers' profits.
Six, small pitch LED screen maintenance costs high
Installation and maintenance costs are another key consideration in selecting different technology products. Many users of selected products ignore their future maintenance costs. The lack of funds can only allow products to be used in incomplete conditions, or even to abandon their use. This is totally different from the original plan.
Small-pitch LED, according to the current process technology master, even foreign companies are in the delivery are divided into groups of Bin, the number is as follows - color points BinR = 1, G = 5, B = 3 (color of the same group Bin eyes Can distinguish differences);
- Brightness BinR=4, G=4, B=4;
- Totally RGBLEDs total 5x3x1x4x4x4=960Bin.
Proximity Bin groups need to be selected for production, and point-by-point calibration is used to homogenize the LED screen. But in the future, it is very easy to cause Huaping, the physical reason is: the difference of the display screen causes the LED operating current to be different, resulting in different attenuation rates. In order to maintain a professional uniform picture, stop correction must be done frequently. In addition, due to the inevitable death of lights, maintenance and replacement frequency will not be less. These are all maintenance costs, and it is rather troublesome for general use units to fight for construction expenses but it is difficult to list the maintenance costs.
Small-pitch LED screens are everywhere for siege, but there are special situations in the control room segment. From the perspective of component reliability, visual effects, initial installation costs and future maintenance costs, the small spacing is obviously not suitable for 7 /24 control room.
Small-pitch LED screens have appeared in indoor commercial displays and conference rooms in recent years as superstars. Take the control of the application of the control room in a stronger position. The dazzling colors and large screens that look like they have no seams are perfectly applied in the control room, and the first-timers are amazed. Next we look at it from a technical perspective: Is a small-pitch LED suitable for subdividing the control room?
First, the control room's large-screen use situation
The control room requires the information display to be point-to-point non-zoom, and does not allow the bad point control room to mainly display large data information. It is not used for general video or image display purposes, so a clear display of each pixel is necessary. Therefore, in the control room application process, if the display screen has a bad point, it will not be recognized as a professional product. In the control room, the scale of the combination of display screens can be composed of dozens to hundreds of projection boxes. If you use 10 full HD screens, the number of small-pitch LEDs will consist of 20 million RGB LEDs. This is a huge number of components. In the theory of system reliability, each component has its own probability of damage, and the reliability of components is poor. Based on this theory, we can predict that the probability of dead lights for small-pitch LED screens is very high. At present, the Chinese government regulates that outdoor LED screens can accept dead lamp rates between one ten-thousandth and three. This one-tenth cannot be used at all in the control room. If we assume that the indoor small-pitch LED has ten times better reliability, it can only reach one hundred thousandth. Looking at the number of 20 million LEDs, there are nearly two hundred chances of dead lights in the entire film. This number of dead lights cannot be tolerated in a professional control room. DLP projection splicing large screen industry, Ti factory DMD component specifications are no dead pixels.
Second, the control room 7x24 endless operation throughout the year
The 7x24 operation is particularly stressful for the use of display devices, and therefore the reliability of the device is particularly high. Compared to commercial displays, there are at least off-time breaks every day that allow equipment and components to release pressure. Therefore, it is not suitable for commercial use equipment, and it does not necessarily stand the test of 7x24. Such as the narrow side LCD display, the original factory is recommended to use no more than 20 hours a day, let the component rest to release the pressure, reduce the rate of deterioration of the picture. However, DLP has been used in the control room for more than 20 years and has passed the rigorous 7x24 test. However, the market time for small-pitch LED screens and their application in the control room are not long enough.
Third, the control room staff to watch large screen for a long time
The interaction between the staff and the big screen takes a long time to watch, so there are special requirements for the display screen. The picture quality must be soft, without glare, and the brightness should not be too bright to protect the health of the eyes. The small pitch LED screen is not a seamless magic, in fact it is full of seams, but can not see the uneven stitching stitching. It is a tiny light-emitting space ratio (light-emitting point only accounts for about 1/10 of the area of ​​the component), in exchange for stitching looks seamless, and its side effects are obvious grainy. It is easy to feel uncomfortable visually and is not suitable for close-up viewing. The visual effect of the small-pitch LED screen is different from that of the DLP projection, it is obviously glare, and the brightness is not easy to be small. If the brightness of the LED is reduced, there will be ghosting, bad visual effects such as dark lines in the first line, low gray color casts, uneven grays, and gradient dark lines. The long-term and long-term viewing on a daily basis, the impact on the human eye to be observed. The application of the control room emphasizes the amount of information. All display information can be quickly determined at a glance, so the display size and number of portrait points are all required specifications. Can't use zooming to hard-wire high-quality information to lower-resolution displays. However, at present, the number of pixels of a small-pitch LED screen is not consistent with the signal source, and signal scaling will be performed.
Fifth, the same pixel resolution, DLP wall installation costs lower
Small pitch LED screens have the same technical resolution as DLP. But we need to examine its commerciality from a cost perspective. The price of a DLP Full HD 70†box is about RMB 80,000 to RMB100,000. This year's P1.9 LED screen with a small pitch is priced at RMB 30,000 per square meter. Estimated to be the same resolution as DLP, the cost is estimated It costs RMB 220,000, which is about 2.2-2.7 times, and the area demand is 5.5 times that of DLP, which means that in addition to the increase in costs, there is still a lot of space to install, and the additional funding is huge. The downward trend in the price of screens can be expected, is that so? The cost of LED screens can be divided into material and labor costs. The LED single chip and patch cost account for the most part. From the LED side, according to the upstream component manufacturers, there is almost no Profit, it is difficult to cut prices and continue to spend money on new component development.If the component is further reduced, the yield rate will decrease and the cost will increase.The other is the patch cost, which is a labor cost. When the labor cost rises, almost no There may be room for price cuts, so dividends that are expected to cut prices can only be released from small-pitch LED screen makers' profits.
Six, small pitch LED screen maintenance costs high
Installation and maintenance costs are another key consideration in selecting different technology products. Many users of selected products ignore their future maintenance costs. The lack of funds can only allow products to be used in incomplete conditions, or even to abandon their use. This is totally different from the original plan.
Small-pitch LED, according to the current process technology master, even foreign companies are in the delivery are divided into groups of Bin, the number is as follows - color points BinR = 1, G = 5, B = 3 (color of the same group Bin eyes Can distinguish differences);
- Brightness BinR=4, G=4, B=4;
- Totally RGBLEDs total 5x3x1x4x4x4=960Bin.
Proximity Bin groups need to be selected for production, and point-by-point calibration is used to homogenize the LED screen. But in the future, it is very easy to cause Huaping, the physical reason is: the difference of the display screen causes the LED operating current to be different, resulting in different attenuation rates. In order to maintain a professional uniform picture, stop correction must be done frequently. In addition, due to the inevitable death of lights, maintenance and replacement frequency will not be less. These are all maintenance costs, and it is rather troublesome for general use units to fight for construction expenses but it is difficult to list the maintenance costs.
Small-pitch LED screens are everywhere for siege, but there are special situations in the control room segment. From the perspective of component reliability, visual effects, initial installation costs and future maintenance costs, the small spacing is obviously not suitable for 7 /24 control room.
Discussion on the Suitability of Small Pitch LED Display in Control Room
Small-pitch LED screens have appeared in indoor commercial displays and conference rooms in recent years as superstars. Take the control of the application of the control room in a stronger position. The dazzling colors and large screens that look like they have no seams are perfectly applied in the control room, and the first-timers are amazed. Next we look at it from a technical perspective: Is a small-pitch LED suitable for subdividing the control room?