Talking about the technical problems of the LED electronic display screen and the quality control plan

May 10, 2021

LED electronic display screens are becoming more and more widely used in life, and the technology for large-screen display has also improved. At present, LCD displays are very promising due to their excellent display effects, but the splicing technology in large-screen displays has not been To achieve a seamless level, and the small pitch of the LED successfully made up for this shortcoming, and it succeeded. In the mature period of the seamless splicing technology of large LCD screens, LED electronic displays jumped up and occupied the large-screen display market.

LED electronic display technology problem solving

The first is high luminous efficiency: the luminous efficiency of LED electronic display screens can be said to be an important indicator of energy-saving effects. At present, my country’s luminous efficiency needs to be strengthened. To truly achieve high luminous efficiency, it is necessary to solve related problems in all links of the industrial chain. Technical issues, then how to achieve high luminous efficiency? This article will specifically discuss the technical issues to be solved in several links such as extensions, chips, packaging, and lamps.

1. Improve internal quantum efficiency and external quantum efficiency.

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

3. Improve the light extraction efficiency of the lamp.

Secondly, from the perspective of high color rendering: LED electronic display has many light and color qualities, including color temperature, color rendering, light color fidelity, light color naturalness, hue recognition, visual comfort, etc. Here wecurrently only discuss solving the problem of color temperature and color rendering. The production of high color rendering LED display light source will lose more light efficiency, so these two factors should be taken into consideration when designing. Of course, to improve the high color rendering property, 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 powder plus chip.

is again in terms of high reliability: mainly including failure rate, life and other indicators. But there are different understandings and explanations 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 main failure categories of led are serious failure and parameter failure. The lifetime is a characteristic value of product reliability. : Generally refers to the statistical average value. 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, and heat dissipation. Now that we are talking about this, I hope that companies will make two requirements on the basis of comprehensive quality control of LED display products:

1. Reduce failure rate.

2. Extend the time of consumption loss.

The last is to reduce the cost of the product: At present, many consumers feel that the price is too high when they buy LED display screens, so many LED display screen manufacturers have also taken corresponding measures to reduce costs in addition to mass production. Methods and approaches to take measures to reduce costs mainly from the technical point of view. Mainly to reduce costs in terms of 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 of the epitaxial chip link.

2. The method to reduce the cost of the packaging process.

3. Methods to reduce costs in the lighting sector.

4. Reduction of other supporting costs.

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