With the vigorous development of highways in China, intelligent transportation management plays an increasingly important role in ensuring safety and improving traffic management efficiency. High definition, safe, energy-saving and environmentally friendly real-time monitoring and traffic control of the highway network have greatly improved the utilization efficiency and safety of the road network operation. However, seamless LED splicing technology has incomparable advantages for the construction of highway projects.
1. Resolve the visual defect of segmented large screen images in splicing and achieve seamless integration
In practical work, seamless LED splicing technology can solve screen segmentation problems and achieve seamless requirements. Looking at the current large screen splicing system in China, many display screens still have many splicing seams in operation. For example, in LCD splicing systems, the gaps are too large to meet the needs of users. Compared to liquid splicing technology, plasma and back projection large screen splicing systems have many advantages. However, in terms of their visual effects, there are still a large number of segmentation lines. Even if LCD, DLP, and PDP technologies are applied in engineering, increasing the technical requirements can only reduce the gap and cannot eliminate it. So far, the level of splicing technology has been "seamless", "narrow", "almost seamless", etc. However, this still cannot deny the existence of gaps.
By adopting seamless LED splicing technology, the screen resolution can be improved in a smaller area, ensuring the texture of the image and meeting the needs of users for close viewing. Compared with existing splicing technologies, seamless physical splicing of LED can achieve cross screen display. For splicing, the level is not determined by the size of the gap, but by whether the gap exists. The seamless LED technology for highways adopts * technology to connect various units together and compensate for the defects in the design process with special processes. In this way, it is possible to achieve uniform distribution of pixel spacing and eliminate seams.
2. * Solve the problem of inconsistent brightness and chromaticity attenuation in splicing large screens
The application of seamless LED technology on highways will effectively handle the situation where the brightness and chromaticity attenuation of spliced large screens are different. In this technology, point by point brightness and chromaticity correction techniques are generally used to ensure the unity of brightness and chromaticity. For example, the application of point control technology creates a platform for users to correct chromaticity and brightness point by point, and controls the pixels of the screen to achieve high image restoration. This technology has both SMS and email notification functions, which can enable users to timely grasp the status information of the splicing wall.
3. Intensive display and control platform, capable of handling all surveillance video sources
Seamless LED technology utilizes an intensive display and control platform to ensure the reliability of surveillance video sources. An intensive display and control platform can create a management platform for customers and effectively manage video signals, computer signals, and network signals, providing users with better services.
4. Powerful redundant backup design for power and signal, ensuring safe and reliable use
In the design of seamless LED systems, redundancy of power and signals has been backed up, which can reduce the occurrence of problems during their use. This is mainly reflected in the following aspects:
(1) Signal redundancy design control. In seamless LED technology for highways, the signal redundancy design adopts dual channel signal and exhibits N+1 redundancy, supporting hot plugging.
(2) Optimize the design of decentralized power supply to centralized power supply, reduce key heating components of the screen body, and save more energy; Integrated power supply with N+1 redundancy design, intelligent current sharing in case of power failure, improving usage safety. In addition, the power supply supports hot swapping, making maintenance simple and fast.
5. Ultra long lifespan, simple maintenance process, and ultra-low repair costs
Compared to general display screens, LED has a longer lifespan and relatively lower maintenance and repair costs. Taking seamless LED technology in a certain project as an example, the LED standard unit and display panel are assembled into smaller units (L2.5:200 * 80mm/block-8.5 inches): the display pixels are composed of individual LED lights; If there are necrotic spots, replace them with spare parts and repair one LED light; If the panel shows irreparable issues, replace a small piece of the display panel; Taking a 32 inch display area as an example, the area is only 4% of that of a traditional panel. At present, the mainstream splicing units are 46 inch, 55 inch, and 60 inch, and the proportional cost will be lower. In addition, in this case, the DLP monitor specifications in the seamless LED system are generally between 50-100 inches and have a lifespan of around 8000 hours. If there are problems with the projection light bulb and panel, the LCD monitor needs to be replaced as a whole, with specifications generally ranging from 40 to 100 inches. The glass panel is prone to damage and needs to be replaced as a whole.
6. Ultra large viewing angle, ultra-high contrast, ultra-high refresh rate
The project provides a larger viewing angle and prevents the occurrence of reflective phenomena. Based on the above engineering case analysis, it adopts a matte black bottom panel and a black light bead surface, breaking through the limitations of traditional screen reflection, with a contrast ratio of up to 4000:1 and better color expression. In addition, its filling rate and contrast are also very high. When capturing images, the state is relatively stable, able to handle dynamic display images, with clear image edges and good dynamic expression, accurately and authentically restoring image information. Make the video screen delicate and smooth, bringing great visual enjoyment. In addition, it is worth noting that the brightness uniformity of LED screens, when combined with single point brightness correction, can make the overall brightness uniformity of the screen tend towards infinity.
7. Ultra thin, ultra light structure, * heat dissipation treatment technology
In the application process of seamless LED splicing technology, * heat dissipation treatment technology is also used. The engineering case I am researching mainly uses high-performance thermal conductive material aluminum plate for overall heat dissipation. The left and right wings of the unit shell carry away the heat inside the box through convection slots, which is beneficial for maintaining the same temperature as the environment. The large-area aluminum plate heat dissipation surface on the back of the box is an attached heat dissipation body for circuits and ICs. The good self heat dissipation design and convection scheme ensure that the product has strong heat dissipation performance.
8. Dynamic energy-saving, ultra-low power consumption, green light source, energy-saving and environmentally friendly, pollution-free
In practical applications, seamless LED splicing technology for highways can reduce energy consumption and save engineering costs. This is highlighted in the following two aspects:
(1) Low power energy-saving technology
LED high-definition display walls generate different power consumption as the image changes during operation; Equivalent to a portion of the peak required power consumption, typically between 30% and 50%; There are differences in the displayed content; Traditional splicing large screens maintain a constant power consumption, that is, the required power, even if the screen is black, regardless of the content of the picture during operation.
(2) Energy saving and environmentally friendly, pollution-free products
Traditional splicing large screens without pollution may have various environmental pollution sources such as mercury, ultraviolet radiation, and auxiliary radiation due to their luminescent materials, working principles, and other reasons. The LED high-definition display screen directly emits light to display products, while the LCD light source is a backlight bulb (tube), and its emitting medium is mostly tungsten, lead, etc., which has no significant impact on the environment.