"Three highs and one low" actually refers to the high color rendering, high luminous efficiency, high reliability and low cost mentioned in the LED display technology. How to achieve low cost and make the quality of LED display reach "three highs". This requires a series of measures in all aspects of the LED display industry chain. Such as the use of new technologies, new structures, new processes, new materials. As a new emerging industry, LED display screens are highly valued and are the core issues in the overall process.
The following is mainly analyzed from the "three high and one low", that is, high color rendering, high light efficiency, high reliability and low cost:
The first is from the high color rendering: LED display color quality, including color temperature, color rendering, light color fidelity, light color naturalness, hue recognition, visual comfort and so on. Here we are only discussing the issue of color temperature and color rendering. Producing a high color rendering full-color LED display light source will lose more light efficiency, so take care of these two factors in design. Of course, to improve high color rendering, you must also consider the RGB three primary color combination to achieve. Here are my three methods:
1. Multi-primary phosphors.
2. RGB multi-chip combination.
3. Phosphor plus chip.
It is high luminous efficiency: the light effect of LED electronic display can be said to be an important indicator of energy saving effect. At present, China needs to strengthen the light effect effect. To truly achieve high light efficiency, it is necessary to solve related technologies from all links of the industrial chain. Question, then how to achieve high light efficiency? This article will specifically discuss the technical issues to be solved in several links such as extension, chip, package, and lamps.
1. Improve internal quantum efficiency and external quantum efficiency.
2. Improve the light-emitting efficiency of the package and reduce the junction temperature.
3. Improve the light extraction efficiency of the luminaire.
Again, from the perspective of high reliability: it mainly includes indicators such as failure rate and life. However, there are different understandings and explanations in the application. High reliability refers to the ability of a product to perform a specified function under specified conditions and within a specified time. The LED failure categories mainly have serious failures and parameter failures. Lifetime is a characterization of product reliability. If the LED display manufacturer wants to get good control over the overall quality of the display, you need to do the following two things:
Extend the loss of time.
Reduce failure rate.
Finally, in reducing the cost of products: At present, many consumers feel that the price is too high when they buy LED display screens. Therefore, many LED display manufacturers have also taken corresponding measures to reduce costs in addition to mass production. Mainly from the technical measures to reduce costs, ways and means. Mainly in the epitaxial chip, packaging, drive, heat dissipation and other aspects to reduce costs, thereby fundamentally solving the cost of LED display products. Specifically speaking from the following four aspects:
The method of reducing the cost of the epitaxial chip link.
The method of reducing costs in the packaging process.
The method of reducing the cost of the lamp chip link.
Reduction of other supporting costs
The above is mainly to solve the main technologies of LED display and take corresponding measures from the four major technologies of high color rendering, high luminous efficiency, high reliability and low cost. In general, in addition to adopting new technologies and new processes, New structures, new materials and other measures to achieve high luminous efficiency, high color rendering, high reliability and low cost of LED display, from a deeper level, should improve energy efficiency and light color quality as a higher requirement for full-color LED display In order to truly provide people with the demand for products! Only the LED manufacturers start from the most basic, from the various aspects of production, plus the cooperation of various material supply links of each display, can fully improve the overall quality of LED display.
Edit: Nizi
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