Advantages of Seamless LED Mosaic Screen in Highway Engineering

The total mileage of China’s expressways has exceeded 100,000 kilometers, ranking first in the world, and a high-speed driving network has been formed, symbolizing the rapid economic development of China. At the same time, the highway LED information release system has gradually entered the public view and played its greatest role in the convenient, fast, and safe driving of the expressway. In order to meet the needs of the market, high-density led display screens and seamless splicing screens have emerged and have been applied in the field of traffic and highway engineering.

Three Processes of Seamless Splicing Technology Development

From the perspective of its development process, seamless splicing technology has gone through three processes, namely, pure hardware integration technology, pure software integration technology and software and hardware integration technology.

Pure hardware fusion technology mainly refers to the use of optical shading principles to fuse multiple images together. Pure software fusion technology uses electronic circuits to process images. The hardware and software integration technology combines the above two technologies. This includes both optical shading fusion technology and electronic fusion. Compared with the former two technologies, its display effect is relatively good. This is because the hardware convergence technology can solve the black balance problem in the image processing process. At the same time, the software fusion technology has a positive effect on the processing of the image white balance. The two technologies complement each other and can enhance the trueness of the reproduced image.

As for the analysis of the splicing effect, the seamless splicing technology also undergoes three processes, which are hard splicing, overlapping splicing and soft edging splicing. In the process of applying hard-edge splicing technology, there are inevitably some seams, resulting in a lack of panoramic rendering work; overlap splicing specifically refers to: the use of two projectors, the projected images are superimposed in the joint to To achieve the effect of overlap. Compared with hard edge stitching technology, this stitching technology has many advantages, but it also has certain limitations. This splicing method may result in an excessively large number of image overlays, resulting in an overly bright area of ​​the display screen. As a result, the application of seamless technology will be adversely affected. Soft edge fusion is the use of edge fusion technology for image processing. This not only makes the two sides better integrated, but also effectively prevents the emergence of too bright areas. In addition, the soft edge fusion splicing technology has a relatively wide range of adaptability and can be used in planes, cylinders, spheres, and the like. Highway seamless LED splicing technology takes full advantage of this advantage to provide guidance for the construction of highway projects.

Eight major application advantages in highway engineering:

1. Thoroughly solve the visual defects of splicing large-screen images and achieve complete seamlessness. In the specific work, seamless LED splicing technology can completely solve the problem of screen segmentation and achieve completely seamless requirements. Looking at the large-screen splicing system in China at this stage, many display screens still have more stitching seams in their work. For example, the LCD splicing system has too large a gap to meet the needs of users. The plasma and the rear projection large-screen splicing system have many advantages compared to the liquid-splicing splicing technology. However, from the visual effect point of view, there are still a large number of segmentation lines. Even if the LCD, DLP, and PDP technologies are applied in the project, the technical requirements are mentioned as being the highest, and only the gap can only be reduced and it cannot be completely eliminated. So far, the best levels of patchwork technology are "seamless," "narrowest," "nearly seamless," etc. However, this does not negate the existence of gaps.

With seamless LED splicing technology, the screen resolution can be improved in a small area, ensuring the texture of the screen and satisfying the user's need for close viewing. Compared with the existing splicing technology, LED physical seamless splicing can realize multi-screen display. For patchwork, its level is not the size of the gap, but the existence of gaps. The seamless highway LED technology adopts a unique technology that connects the units together and compensates for defects in the design process with special processes. In this way, it is possible to achieve a uniform distribution of pixel pitches and achieve the purpose of eliminating patchwork.

2, completely solve the problem of inconsistent splicing large screen brightness and chroma attenuation application highway seamless LED technology, will effectively handle the splicing large screen brightness and chroma attenuation is not the same situation. In this technique, point-by-point luminance and chroma correction techniques are generally used, which guarantees the uniformity of luminance and chrominance. For example, the application of point control technology, to create a point-by-point calibration of the user's chroma and brightness of the platform, and control the pixels of the screen to achieve a high degree of image restoration. This technology also has SMS and E-mail reminding capabilities, so that users can promptly grasp the status of the video wall.

3. Intensive display and control platform, to ensure that all monitoring video source seamless LED technology applies an intensive display and control platform to ensure the reliability of the monitoring video source. The intensive display and control platform can create a management platform for customers and effectively implement management of video signals, computer signals, and network signals to provide users with better services.

4. Powerful and redundant backup design of power supply and signal ensures safe and reliable use. In the design of a seamless LED system, backup of power supply and signal redundancy is performed, which can reduce the occurrence of problems during its use. This is mainly reflected in the following aspects:

(1) Signal redundancy design control. In the freeway seamless LED technology, the signal redundancy design adopts dual-channel signals and is represented by N+1 redundancy and supports hot swap.

(2) Optimize the decentralized power supply design for centralized power supply, reduce the key heat-generating components of the screen, save energy more efficiently, and design the integrated power supply with N+1 redundancy. When the power supply fails, the current will be shared intelligently to improve the safety of use. In addition, the power supply is hot swappable and easy to maintain.

5, long life, easy maintenance process, low maintenance costs LED life compared to the general display, the long life, and its maintenance and maintenance costs are relatively low. Taking the seamless LED technology in a project as an example, the LED standard unit and the display panel are made up of smaller units (L2.5: 200*80mm/block - 8.5 inches): the display pixel is a single individual LED lamp. If there is a necrosis point, replace it with a spare unit and repair one LED light. If the panel appears irreparable, replace a small display panel. Take a 32-inch display area as an example. The area is only traditional. 4% of the panel. The current mainstream is the 46-inch, 55-inch and 60-inch splicing unit, and the proportional cost will be lower. In addition, in this case, the specification of the DLP monitor in the seamless LED system is generally 50 to 100 inches and the lifetime is about 8000 hours. If there is a problem with the projection lamp and the panel, the LCD monitor needs to be replaced as a whole. The specifications are generally 40 to 100 inches. Glass panels are easily damaged and need to be replaced as a whole.

6, large viewing angle, ultra-high contrast, ultra-high refresh rate engineering provides a larger viewing angle, and to prevent the emergence of reflective phenomenon. Based on the above engineering case analysis, it uses a dark matte black bottom panel and a black lamp bead surface, which breaks through the limitations of conventional screen reflections, with a contrast ratio of up to 4000:1, and better color expression. In addition, the fill rate and contrast are also very high. When the screen is captured, the state is relatively stable, the dynamic display screen is handled, the edges of the image are clear, and the dynamic expression is good, and the image information is restored accurately and truly. Make the video screen smooth and smooth, bringing maximum visual enjoyment. In addition, a special point is made that the uniformity of the brightness of the LED screen is excellent, and the single-point brightness correction is coordinated so that the brightness uniformity of the entire screen tends to be extreme.

7, ultra-thin, ultra-light structure, ultra-quiet thermal processing technology in the process of seamless LED splicing technology, also uses ultra-quiet thermal processing technology. The engineering case I studied mainly uses the heat-dissipation material aluminum plate as a whole to dissipate heat. The left and right wings of the unit shell take away the heat inside the box through the convection tank, which is conducive to maintaining the same temperature as the environment. The large-area aluminum heat-dissipating surface on the rear side of the cabinet is an attached heat sink for the circuit and IC. A good self-heating design and convection scheme ensure that the product is ultra-quiet and highly heat-dissipating.

8. Dynamic energy saving, ultra-low power consumption, green light source, energy saving and environmental protection, no pollution (1) Low power consumption and energy saving technology LED high-definition display wall generates different power consumption as the screen changes. Part of the power consumption is generally between 30% and 50%; there is a difference depending on the display content; when the traditional splicing large screen is working, regardless of the screen content, even if the black screen, it still maintains a constant power consumption, that is, power.

(2) Energy-saving and environmental protection, non-polluting products without pollution Traditional splicing large screens, due to their luminescent materials, working principles, etc., will have various sources of environmental pollution such as mercury, ultraviolet radiation, and auxiliary radiation. LED high-definition display direct light display products, LCD light source for the backlight bulb (tube), the luminescence medium is mostly tungsten, lead, etc., have no significant impact on the environment.

In the process of highway construction, seamless LED splicing technology is used to make the picture of the entire screen very clear and the viewing angle is relatively large, which is very favorable for the construction of the project.

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