The use of more and more in daily life, for the large screen display technology has also been improved, at this stage, the LCD display with its excellent display actual effect is very promising, but in the large screen display in the seamless splicing technology has not reached the level of seamless splicing, and Led small spacing smoothly filled this shortcoming, the smooth rise. In the mature stage of LCD seamless splicing technology, Led electronic display jumped up and dominated the large-screen display industry market.
Led electronic display technical issues improved
The first is high light efficiency: the light efficiency of led electronic display can be said to be a key indicator of the actual effect of environmental protection and energy saving, at this stage, the actual effect of light efficiency in China still needs to be enhanced, to really achieve high light efficiency, to deal with important technical problems from each link of the whole industry chain, so how to establish high light efficiency? This paper will actually discuss the technical problems to be dealt with in many links such as external, chip, package, lamps and so on.
1. Improve internal quantum efficiency and external quantum efficiency.
2. Improve light efficiency and reduce junction temperature.
3. Improve the lighting efficiency.
In addition, it should be seen from the high color rendering index: there are many light color qualities, including color temperature, color rendering index, light color high fidelity, light color naturalness, color discrimination, visual comfort, etc. Here we only discuss the problem of color temperature and color rendering index at this stage. Make a high color rendering index led display light source, will lose more light efficiency, so in the design to take care of these two aspects of the elements. Perhaps to improve the high color rendering index must also consider the RGB three primary color combination to establish. Here I also have three ways:
1. Multi-color phosphor.
2.RGB multi-chip combination.
3. Phosphor plus chip.
Again, from a high reliability point of view: mainly including failure rate, service life and other indicators. But there is a different understanding and discussion in the application. High reliability refers to the ability of a commodity to fulfill its specified purpose under a specified standard and within a specified time. led failure category key has serious failure and parameter failure. The service life is the characteristic value of product safety. Generally refers to the statistical analysis of the average, for many components, the service life of led devices is also the meaning of choosing this kind of statement. However, the elements that endanger the safety of led display products are chip manufacturing, packaging, thermal resistance, heat removal and so on. Perhaps speaking of this, the company is expected to make two provisions on the implementation of comprehensive quality management of led display products:
1. Reduce failure rate.
2. Extend the wear failure time.
Ultimately is to reduce the cost of the product: at this stage many customers in the purchase of led display before the price is too high, so for this many led display manufacturers have also adopted the relative countermeasures, to control the cost in addition to the mass production of manufacturing, the key from the technical measures to control the cost of the way, way. The key is to control costs at the level of additional chips, packaging, driving, heat removal, etc., so as to deal with the cost of led display products in many ways. In fact, it starts from the following four aspects:
1. Add the cost control method of the key link of the chip.
2. Sealing key links to control cost.
3. How to control the cost of key links of lamps and lanterns.
4. Reduction of other ancillary costs.
How to control and improve the quality of LED full color display
The display effect of the full-color LED display is immediately related to the customer and the audience, and in order to obtain the ultimate application experience, the quality of the LED display must be manipulated and improved. So, how to manipulate and improve the quality of LED full-color display? What are the key indicators of the quality of LED displays commonly used in full-color LED displays?
LED devices as the most core components of full-color LED display, there are three reasons:
First of all, LED is a key device in the total number of applications in the full color screen, and thousands to tens of thousands of leds will be applied to one square meter;
Second, LED is the main body that decides the characteristics of the electronic optical display of the whole screen, which immediately endangers users' comments on the display.
Finally, LED in the overall cost of the display often accounts for a relatively large, from 30% to 70%. LED selection decisions all display more than 50% quality. If you can not choose a good LED, although the other components of the display can not recover the quality of the display.