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Some Requirements of Small Distance LED Display on Front - end Image

Some Requirements of Small Distance LED Display on Front - end Image

With the birth of micro-pitch LED display, micro-pitch LED display with a real seamless stitching, high price, superior color reproduction, near-perfect display, etc., has been more and more applications Command center hall, control room, conference center and other key occasions. With the micro-pitch LED display pixel spacing continue to narrow, so that people's viewing distance is further narrowed, in order to achieve better display, not only requires the micro-pitch LED display itself in the image processing and processing technology to improve, Micro-pitch LED display signal front-end image stitching processor also put forward higher requirements.

As shown, a complete micro-pitch LED display system includes a back-end micro-pitch LED display processing system and the front of the image mosaic processing system, through a set of large-screen control management software allows the system to control the effective processing of various hardware devices , The final realization of the signal in accordance with the requirements of the people on the screen perfect display. Micro-pitch LED large screen display system has the advantage of a high degree of system integration, the entire system by a set of control and management software, centralized control and management, in addition to image processing systems, display unit equipment management, control a variety of signal display, you can Control RGB matrix, video matrix and other related peripherals, so that multiple systems to achieve a high degree of integration, centralized control. Large-screen system, the key components - micro-pitch LED display unit, pure hardware multi-screen processor and large-screen control management software need to use the same brand, and all targeted compatible compatible design, ensuring system compatibility while providing reliable security . The display unit, the image controller and the control software are the core parts of the whole large-screen system. If they are integrated with different manufacturers' products, they may cause technical compatibility problems and affect the realization of many important functions, and reduce the system reliability and efficiency. ; On the other hand, due to the number of manufacturers involved, it is likely to occur after-sales maintenance failure diagnosis and timely supply of spare parts and other issues, and may not be able to upgrade the system to maintain consistency and reduce system scalability. It can be seen to ensure that micro-pitch LED display system can display a perfect and continuous reliable operation, only good quality LED display unit is not enough, with good compatibility and excellent performance of the image processor is also indispensable A ring, the following I on the micro-pitch LED display image stitching technology to do an interpretation:

First of all, we must recognize the micro-pitch LED display and other large-screen display technology (such as DLP, LCD) the difference, according to these differences, we can determine the traditional application of the image stitcher must modify or increase which functions can be applied to our Micro-pitch LED display.

Compared with the traditional large-screen display technology, micro-pitch LED display with a longer life, better display, the real seamless stitching, energy saving and environmental protection advantages of low noise, but the biggest difference actually reflected in its box Composition of the form, the traditional DLP or LCD splicing display unit has a standard resolution of the input support, and micro-pitch LED display is mostly non-standard resolution; another difference is that most of the traditional large-screen display unit size and resolution Relatively large, and micro-pitch LED display unit taking into account the arc splicing of the smooth and point spacing restrictions, the unit box size smaller resolution is smaller, the splicing composition to meet the sending and receiving cards to achieve the final display, And send the card and front-end image processor connections are mostly not the corresponding standard resolution; splicing a key application is to output multi-channel DVI signal, the matrix array of multiple display splicing display, making it a Logically complete display area.

For micro-pitch LED display, we can be a LED controller (sending card) driven by the display area as a separate Led display, the current LED controller to use DVI as the signal input interface, support The maximum input resolution of 1920 & TImes; 1200, then driven by the maximum physical resolution of LED display 1920 & TImes; 1200, with the micro-pitch LED display product display area is growing, dozens of square meters of the project more and more , Led display the physical resolution often exceeds 1920 & TImes; 1200 resolution, so basically all by a number of LED controller driven by a combination of multiple independent display area. For the splicing device, the need to correspond to the number of LED controller, provide a corresponding number of DVI output interface, and the entire LED screen splicing display. Coupled with the splicing device on the screen of the traditional technical problems, micro-pitch LED display front-end stitching device must address three questions:

First, the output resolution can be customized to meet the LED display physical characteristics of the irregular resolution

We all know that micro-pitch LED display by a piece of the display unit box in the form of matrix stitching, and each display unit size and physical resolution is fixed, but together the entire splicing up the big screen is often not a Standard physical resolution, for example: the display unit of the physical resolution of 128 & TImes; 144, can only be stitched into a 1920 × 1152, missing can not spell out the standard resolution of 1920 × 1080. Often in a large-scale splicing system, each LED controller is driven by the LED display area is also not the standard resolution, this time with front-end stitcher output is non-standard resolution is particularly important, it can help us quickly find the right The splicing method, a reasonable allocation of resources, effective savings LED controller and transmission equipment used to increase the stability and reliability of the system, while ensuring the best display.

Second, we must ensure that the output synchronization, to avoid stitching screen is not synchronized to ensure that no tear phenomenon

Multi-channel DVI output signal of the stitching device must have the problem of synchronization of the signal. The output of the non-synchronous DVI output signal to the LED display screen will inevitably appear on the screen splicing phenomenon, especially when playing fast moving images. obvious. How to ensure the synchronization of the output signal has become a key measure of the success of the splicer system.

Third, we must adopt a more high-quality image processing algorithms, so that after scaling the image processing and transmission to maintain high-definition

As we all know, point-to-point image display is the best, if the image after reducing the use of ordinary image processing technology or general image processing algorithms, the image brightness will be reduced, the edge of the image will appear jagged or pixel missing . The face of micro-pitch LED display on the demanding requirements of the display, it is necessary to use high-end image processing chip and the complexity of the optimized image processing algorithms to ensure maximum processing of the image to maintain the best display, therefore, good Image processing algorithm is the image stitching applied to micro-pitch LED display one of the keys.

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