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    • 1. 发明申请
    • Non-absorbing polarization color filter and liquid crystal display incorporating the same
    • 非吸收型偏振滤色器和含有这种滤色片的液晶显示器
    • US20050231661A1
    • 2005-10-20
    • US11102196
    • 2005-04-07
    • Pavel LazarevMichael PaukshtoLouis SilversteinPochi Yeh
    • Pavel LazarevMichael PaukshtoLouis SilversteinPochi Yeh
    • G02B5/30G02F1/1335G02F1/1347
    • G02F1/13473G02F1/133533G02F2001/133521
    • The present invention relates to the field of color filters, in particular, to a non-absorbing polarization color filters and to high-brightness color liquid crystal display panel with improved image contrast employing non-absorbing polarization color filters and light recycling among neighboring subpixels. The disclosed invention represents a non-absorbing polarization color filter comprising the following elements: a rear broadband multilayer lossless polarizer, a front broadband multilayer lossless polarizer, and a color polarization rotator. The rear broadband multilayer lossless polarizer has a predefined-oriented transmission axis AB. Said front broadband multilayer lossless polarizer is located approximately in parallel with the rear broadband multilayer lossless polarizer, and has a transmission axis approximately parallel or approximately orthogonal with respect to transmission axis AB. The color polarization rotator is located between the front broadband multilayer lossless polarizer and the rear broadband multilayer lossless polarizer. Said color polarization rotator comprises a stack of thin birefringent films with c-axes orientations alternated in sign according to a rocking angle α with respect to orientation of the transmission axis AB. A number, a rocking angle α, thicknesses and optical anisotropies of thin birefringent films are selected so, that the non-absorbing polarization color filter transmits a predetermined color light having the polarization state approximately parallel to transmission axis AB, reflects said predetermined color light having the polarization state orthogonal to the transmission axis AB, and reflects an unpolarized light of other predetermined color.
    • 本发明涉及彩色滤光片领域,特别涉及非吸收型偏振滤色镜和具有改善的图像对比度的高亮度彩色液晶显示面板,其中采用非吸收型偏振滤色器和相邻子像素之间的光循环。 所公开的发明表示一种非吸收偏振滤色镜,包括以下元件:后宽带多层无损偏振器,前宽带多层无损偏振器和彩色偏振旋转器。 后宽带多层无损偏振器具有预定义的透射轴线AB。 所述前宽带多层无损偏振器大致与后宽带多层无损偏振器平行,并且具有相对于透射轴线AB近似平行或大致正交的透射轴。 彩色偏振旋转器位于前宽带多层无损偏振片和后宽带多层无损偏振片之间。 所述彩色偏振旋转器包括一叠薄的双折射膜,其中c轴取向根据相对于透射轴线AB的取向的摇摆角α在符号上交替。 选择数量,摇摆角α,薄双折射膜的厚度和光学各向异性,使得非吸收偏振滤色器透射具有大致平行于透射轴AB的偏振状态的预定色光,反射具有 与透射轴AB正交的偏振状态,并且反射其他预定颜色的非偏振光。