LED shift new approach to color in warm colors

        Netherlands PSV Eindhoven University of Technology and Philips Research Institute researchers have found a new method to make the LED emits white light warmer tones, the findings have been published online in the "Optics Letters" (Optical Express) on.

 

At lower brightness of incandescent light emits more warm colors, and LED colors are usually not as light intensity changes. The past have tried to use a variety of colors and complex LED dimming control circuit to achieve the color tone at the time of decrease in luminance becomes redder, but the added complexity not only a substantial increase in cost, but also increase the risk of damage.

 

Researchers have discovered a new method that allows the light changes with the temperature shift to color in warm colors. The team produced a coating, the liquid crystal and polymer materials combined at lower temperature allows light distribution, but when heated to 48 ° C or more, the coating becomes transparent, because under conditions of high temperature , the liquid crystal molecules to rearrange such that the material will be transparent.

 

The research team has found that application of the LED designs, using a variety of types of phosphors to achieve industry-standard lighting. "We first need to be tested for reliability, the future may see related products on the market within two years." Chief scientist at Philips in Eindhoven Institute Keneilisen said.www.luxledchina.com