Focus on green LED!

When people talk about warm light emitting diode (LED) with high efficiency, high power and other topics, talk about the object is mostly white and blue LED LED. While "Nikkei Electronics" (August 14, 2006) of high effective green light diode, high power rate given the attention. The reason is that LCD TVs, LED monitors and projectors and other large screen image display device trends. The brightness of these devices is high, in order to produce white balance to achieve white, most of the ratio of RGB to 3:6:1 ratio of light. That is to say, the green LED needs to achieve high power, with the large screen of the image display device, will also require greater output power.

So, all kinds of research aiming at improving external quantum effects of green LED rate began. This print (August 14, 2006) in which a number of years ago, GaN began to study through the crystal change before growth surface so as to enhance the external quantum efficiency as the center, published a description of reports. If the reader to know the details, please consult the publication, this method may be effective external quantum green LED to improve the rate of the previous 2 times, so much attention.

What is green LED after?

Compared with the long history of LED, the study has just opened a head. Therefore, the number of public participation in the limited number of manufacturers to study the main universities at home and abroad. However, many manufacturers have been openly carried out research. Study on the green LED high efficiency, high power, in addition to other purposes.

For example, green semiconductor lasers can be made. If the green laser, including the green semiconductor laser, is used as the light source of the rear projection projector (rear projection TV), the color reproduction range will be wider than when using LED as the light source. In a variety of lasers, semiconductor lasers have the advantage of being smaller than gas lasers and solid lasers.

At present, as a green semiconductor laser, has been used as a laser pointer and rear projection TV light source products. Its working principle is that the 1064nm infrared light emitted by the infrared semiconductor laser is converted by the nonlinear crystal, and the green light is emitted by 532nm. Not directly from the semiconductor laser emitting green light. In addition, as a green laser, there is a nonlinear crystal, so that from YAG lasers and other solid laser light emitting green light. The laser emission wavelength are limited to 532nm, due to the wavelength conversion so low power conversion efficiency for solution.

Therefore, people turn their attention to the research and development of a high degree of freedom and the wavelength of the light emitting efficiency is also high on the green laser. Live with the blue field of semiconductor laser and fiber optical glass is developed and made of white light, with the two characteristics of conversion between the laser power required and white light efficiency high and high output 522nm green light source of concern (see the report). The luminous wavelength is from 532nm to 522nm, and the color reproduction range will be further improved.

Glasses frame is green, windbreaker is green, the name of the first lover is also called "green", the author is very fond of green. It fails to express love first love, I determined to interview down, never let the green laser was born the epoch-making event.