Japan NIMS successfully by red green and blue 3 primary colors of white LED

Japan Institute of materials research (NIMS) announced the successful trial of the red, green phosphor and blue chip LED constitute a white LED. The utility model can change the proportion of red, green and blue at any time, and designs a light source which accords with the color characteristic of the color filter. When the white LED is used for the backlight of the liquid crystal panel, the color performance range is NTSC when the analog value is 91%, which is higher than that of the existing YAG phosphor LED, and the color performance is higher. The development of the white LED is developed by the blue LED chip and NIMS had two kinds of phosphors - red phosphor "CaAlSiN3" and green phosphor "beta -SiAlON" combination of improved products. For the blue LED wavelength 460nm light, red phosphor can be converted to 650nm red light, green phosphor can be converted into 540nm green light. In this way, the red, green, blue 3 primary colors. In the past, the white LED backlight is mostly made up of blue LED chips and yellow phosphor. Although SONY put forward the use of red, green, blue monochrome LED light-emitting backlight design, but the need for 3 kinds of LED drive circuit. The results of the study will be announced in March 27th 08, the opening of the fifty-fifth Joint Conference on Applied Physics in Nihon University. Source: Nikkei BP