Detailed explanation of the main technical issues of LED electronic display screens

　　Electronic display LED display LED

　　First of all, high light efficiency: The light efficiency of LED electronic display screens can be said to be an important indicator of energy saving. At present, my country still needs to strengthen its light efficiency. To truly achieve high light efficiency, we need to solve relevant technical problems in all links of the industrial chain. So how to achieve high light efficiency? This article will specifically discuss the technical problems to be solved in several links such as epitaxy, chips, packaging, and lamps.

　　1. Improve internal quantum efficiency and external quantum efficiency.

　　2. Improve the light output efficiency of the package and reduce the junction temperature.

　　3. Improve the light collection efficiency of lamps.

　　Secondly, from the perspective of high color rendering: LED electronic display screens have many qualities of light color, including color temperature, color rendering, light color fidelity, light color naturalness, color tone recognition, visual comfort, etc. Here we are currently only discussing how to solve the color temperature and color rendering problems. Making a high color rendering LED display light source will lose a lot of light efficiency, so these two factors must be taken into account during the design. Of course, to improve high color rendering, the combination of RGB three primary colors must also be considered to achieve it. Here I also have three methods:

　　1. Multi-primary color phosphor.

　　2.RGB multi-chip combination.

　　3. Phosphor plus chip.

　　The second is from the perspective of high reliability: mainly including failure rate, life span and other indicators. However, there are different understandings and explanations in the application. High reliability refers to the ability of the product to complete the specified function under specified conditions and within a specified time. The main types of LED failures are serious failures and parameter failures. The life span is the characterization value of the product reliability. : Generally refers to the statistical average value. For a large number of components, the life span of LED devices is described in this way. However, the factors that affect the reliability of LED display products include chip manufacturing, packaging, thermal resistance, heat dissipation, etc. Having said that, it is hoped that companies will make two requirements for LED display products on the basis of implementing comprehensive quality control:

　　1. Reduce failure rate.

　　2. Prolong the time of failure due to wear and tear.

　　Finally, in terms of reducing product costs: Currently, many consumers feel that the price of LED display screens is too high, so many LED display screen entrepreneurs have taken corresponding measures to reduce costs. In addition to mass production, they mainly take technical measures to reduce costs. The main method is to reduce costs in epitaxial chips, packaging, driving, heat dissipation, etc., so as to fundamentally solve the cost problem of LED display screen products. Specifically, the following four aspects are discussed:

　　1. Methods to reduce costs in the epitaxial chip segment.

　　2. Methods to reduce costs in the packaging process.

　　3. Methods to reduce costs in the lighting sector.

　　4. Reduction of other supporting costs