[FPD] Sumitomo 3M displays an optical film capable of improving the backlight brightness by 10%

[BP] 3M Sumitomo Nikkei news agency reported on the "FPD International 2007" on display can make the backlight brightness and improve the optical thin film 10%. Through the back lighting lamp light is separated into P polarized light and S polarized light, polarized light that cannot penetrate below the liquid crystal panel polarizing plate has a reflection to be able to use this polarized light, so the film is a reflection type polarizing film. The display of the product "LEF-D2-350" and the company's original product "DBEF-D2-400" compared to the brightness can be increased by 10%. The brightness enhancement is realized by improving the polarized light characteristics of the reflective polarized light film. Previously, some of the reflected light should be reflected through the polarizing plate, it should be reflected through the polarized light of the polarized light, so as to reduce the efficiency of the use of light. This time, through the improvement of the core of the polarized light reflecting film, multilayer film forming process, this effect is reduced. In addition, by improving the design of the diffusion film sandwiched with the multilayer film, the material with low Haze transparency can be used. Diffusion film using polycarbonate (PC). By using the reflective polarizing film on the LED backlight unit, the number of LED can be reduced by 10% without reducing the brightness of the backlight. Thus, the total cost of the LED backlight unit is reduced. In addition, the polarization characteristics of the reflected polarized light film in the tilt angle of the improved effect is particularly significant. Therefore, the color difference can be reduced when viewed from an oblique direction. Compared with the original reflective polarizing film, the chromatic aberration can be reduced by about half when viewed from a 45 degree tilt direction. Therefore, this is a wide color gamut for the characteristics of the LED backlight technology. The company plans to supply the reflective polarizing film from the 07 quarter of fourth.