How to improve the light efficiency reduces the cost of LED lights?
At this stage in blue LED plus phosphor packages produced luminous efficiency white LED bulb is only 11% (2007), while the R, G, B three-color LED light bulbs are packaged white LED luminous efficiency of about 9% (2007). However, if the paragraphs LED manufacturers can improve the efficiency of the manufacturing process, the luminous efficiency by 2015 will increase 4 times the space.
There are a few challenges in the packaging stage to overcome possible to reach these goals:
1. Light color consistency, and how the light is very difficult to achieve consistency, a high cost.
2. Multi-chip package yield decline caused by light is not easy to achieve consistency.
3.LED should meet the quality requirements of consumers.
4. High power LED package, the higher the reliability, raw material is also relatively more expensive, difficult to make the cost down.
5. High power LED packaging technology is very complex, artificial gravity high, is not easy to reduce the amount of production costs.
6. Warm white light with high color rendering issues. Soft and high efficiency will reduce the light.