Solve LED video wall technical problems
LED video wall display is more and more widely used in life, and the technology of large-screen display has also been improved. At present, liquid crystal display is very optimistic because of its excellent display effect, but the splicing technology in large-screen display has not been Achieving a seamless level, and the small pitch of LED successfully made up for this shortcoming and successfully emerged. In the period when the seamless splicing technology of large LCD screen was mature, LED display jumped up and dominated the large screen display market.
LED video wall technical problem solving
The first is high light efficiency: the light effect of LED video walls can be said to be an important indicator of energy-saving effect. At present, my country still needs to strengthen the light effect effect. To truly achieve high light efficiency, it is necessary to solve related technologies from all aspects of the industrial chain. The question is, how to achieve high light efficiency?
1. Improve internal quantum efficiency and external quantum efficiency.
2. Improve the light extraction efficiency of the package and reduce the junction temperature.
3. Improve the light extraction efficiency of lamps.
Secondly, from the perspective of high color rendering: LED video walls have many light color qualities, including color temperature, color rendering, light color fidelity, light color naturalness, color recognition, visual comfort, etc. Here we only discuss solving the problem of color temperature and color rendering. Making a high color rendering LED display light source will lose more light efficiency, so these two factors should be taken care of in the design. Of course, in order to improve high color rendering, the combination of RGB three primary colors must be considered. Here I also have three methods:
1. Multi-primary phosphors.
2.RGB multi-chip combination.
3. Phosphor plus chip.
Again, in terms of high reliability: mainly including failure rate, life and other indicators. However, there are different understandings and elaborations in the application. High reliability refers to the ability of a product to complete a specified function under specified conditions and within a specified time. The LED failure categories mainly include severe failure and parameter failure. And life is the characteristic value of product reliability. : Generally refers to the statistical average. For a large number of components, the life of the LED device is the meaning of this description. However, the factors that affect the reliability of LED display products include chip manufacturing, packaging, thermal resistance, heat dissipation, etc. Now that this is said, I hope that the company will make two requirements on the basis of comprehensive quality control of LED display products:
1. Reduce the failure rate.
2. Extend the time of ineffective consumption.
The last is to reduce the cost of products: At present, many consumers feel that the price is too high when buying LED display screens, so many LED video wall entrepreneurs have also taken corresponding measures to reduce costs, in addition to mass production. , mainly from the technical measures to reduce the cost of methods and ways. Mainly to reduce costs in epitaxial chips, packaging, driving, heat dissipation, etc., so as to fundamentally solve the cost problem of LED display products. Specifically speaking from the following four aspects:
1. The method of reducing the cost in the epitaxial chip link.
2. The method of reducing the cost in the packaging process.
3. The method of reducing the cost of lamps and lanterns.
4. Reduction of other supporting costs.
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