The two groups of LED light source with different characteristics of Taiwan Chi Mei public back lamp technology

Taiwan CMO (CMO) developed the characteristics while using the chromaticity diagram of different groups of RGB two LED light source to reproduce the bright colors of the back light technology MultiPrimary". The company on the "FPD International 2007" shows the use of the technology of LCD panels. By making up the defects, the technology achieves the same effect as increasing the number of color filters.

MultiPrimary uses two groups of RGB LED light sources. A set of light sources that cover the range of the NTSC 88% color display and the LED backlight. The other group is the RGB LED light source with different LED of the first set using the G and B characteristics of the chromaticity diagram. The light source covers the first set of color to be compensated for the narrow blue green portion of the display area by the NTSC to 65% color range. Two light sources can cover the color range of NTSC to 102%. By the way, the R characteristics of the two light source are the same.

Color filter using RGB tricolor products. Prior to the emergence of the use of Y (yellow) and C (blue green), including the 5 color filter to show bright color technology. However, this technique has some disadvantages such as low aperture ratio and resolution, and increased manufacturing process. The development of the technology is the same as the original 3 color filter, so there is no such shortcomings.

The 120Hz image is displayed by alternately lighting two groups of light sources. When the first group of light sources are used, the panel drives the blue green image data extracted from the common image data. When using second groups of light sources, only through the blue green part of the image data to drive. In addition, in the display mode of the panel, the half tone response speed of OCB is also adopted.

Taiwan Chi Mei Electronics, said the purpose of the use of light source from the second groups to consider, as if there is no need to join the R. However, in the future if you need to Y and M (Hong Zi) part of the compensation, you need to use the characteristics of the first group of different R.

Source: Nikkei BP