White LED remains glowing uniformly poor, sealing materials, the problem of life is not long, unable to play a white-light led advantages are expected to apply. But on the demand side, not only general lighting purposes, with mobile phones, LCD TV, car, medical and other widely, making the most appropriate development of stable white light LED technology research on a wide range of concerns. Improve efficiency in white LED light, there are two, one is to enhance the area of the LED chip, so as to increase the amount of light. Second, with a couple of small chips encapsulated in the same module.

By raising the chip area to increase the amount of light

Although the LED chip size will be larger, in order to obtain higher brightness, but due to the large area, in the application process and the result will also appear on the opposite phenomenon. So, on this kind of problem, part of the LED industry according to the electrode structure improvement and flip chip structures, improving on the chip surface, to achieve efficiency of 50lm/W. In white light LED part of the flip-chip packaging, for example, because of the close to encapsulating luminescent layer near to the outside when the light emitting layer, the electrode will not be covered, but the disadvantage is the heat generated is not easily dissipate.