First, the definition of LED electronic display light efficiency:
The luminous flux emitted by the source is divided by the power consumed by the source. It is an important indicator of energy saving in light sources. A portion of the light emitting layer or photons generated within the LED chip is absorbed, reflected or kept within the LED chip, the LED chip can not. Therefore, the external quantum efficiency is lower than the internal quantum efficiency. A white LED with a luminous efficiency of 100 lm/W has only 32% of its input power as light energy output to the outside. The remaining 68% is converted to heat.
Second, how to improve the LED electronic display light efficiency, reduce costs:
1. Multi-chip package results in a decrease in yield and difficulty in achieving light consistency.
2. The consistency of light color, how to make light consistent is very difficult, and will increase the cost.
3. The higher the reliability of the high-power LED package , the more expensive the raw materials are, making the cost less likely to fall.
4, LED should meet the quality required by consumers.
5, warm white light and high color rendering problems. When the softness is high, the light efficiency will decrease.
6, high-power LED packaging process is very complicated, the artificial gravity is high, it is not easy to use the production to reduce costs.
As a green, energy-saving light source, LED is favored by people, and it will also serve as a mainstream media to lead the future of display technology. In order to break through the bottleneck that restricts the development of the industry, many novel solutions have been proposed and verified by theory. Most of them have entered the experimental stage, some have been successful, and laid a solid foundation for the final industrialization.
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