Low layer count reflective polarizer with optimized gain
    96.
    发明授权
    Low layer count reflective polarizer with optimized gain 有权
    具有优化增益的低层数反射偏振器

    公开(公告)号:US09110245B2

    公开(公告)日:2015-08-18

    申请号:US12935500

    申请日:2009-03-27

    IPC分类号: G02B5/30 G02B27/28

    摘要: Multilayer reflecting polarizing films are disclosed having increased in-plane refractive index differences between adjacent microlayers along both the pass and block axis, and having negative refractive index differences between adjacent microlayers along the thickness or z-axis. Major front and back surfaces of the film exposed to air provide a Fresnel reflectivity component to the pass axis reflectivity, and the microlayers provide a microlayer component to the pass axis reflectivity, such microlayer component preferably having a reflectivity of p-polarized light that increases with incidence angle faster than the Fresnel reflectivity component decreases so as to substantially avoid off-axis gain peaks for p-polarized light. The films preferably utilize a relatively small total number of microlayers, arranged in a single coherent stack with monotonic optical repeat unit thickness profile, and at least some microlayers preferably include polyethylene naphthalate or a copolymer thereof.

    摘要翻译: 公开了多层反射偏振膜,其在沿着通过和阻挡轴的相邻微层之间具有增加的面内折射率差异,并且沿着厚度或z轴具有相邻微层之间的负折射率差异。 暴露于空气的薄膜的主要前后表面为通过轴反射率提供菲涅尔反射率分量,微层为通过轴反射率提供微层成分,这种微层成分优选具有随着偏振光的增加而增加的p偏振光的反射率 比菲涅耳反射率分量更快的入射角降低,从而基本上避免了p偏振光的离轴增益峰值。 薄膜优选利用相对较小的总数量的微层,其布置在具有单调光学重复单元厚度分布的单个相干叠层中,并且至少一些微层优选包括聚萘二甲酸乙二醇酯或其共聚物。

    Direct-lit backlight with angle-dependent birefringent diffuser
    98.
    发明授权
    Direct-lit backlight with angle-dependent birefringent diffuser 有权
    带角度的双折射扩散器的直射背光

    公开(公告)号:US08007118B2

    公开(公告)日:2011-08-30

    申请号:US11843178

    申请日:2007-08-22

    IPC分类号: G02B5/30 F21V9/14

    摘要: A direct-lit backlight includes a diffuse reflector disposed in front of a light source. The diffuse reflector has a continuous phase material and a disperse phase material, at least one of which is birefringent, and the disperse phase material is formed into particles having a transverse dimension less than 1 micrometer for efficient visible light scattering. The continuous and disperse phases have refractive indices tailored so the diffuse reflector transmits light from the light source substantially more strongly for obliquely incident light than for normally incident light to provide bulb-hiding characteristics.

    摘要翻译: 直射背光包括设置在光源前面的漫反射器。 漫反射器具有连续相材料和分散相材料,其中至少一种是双折射的,并且分散相材料形成为具有小于1微米的横向尺寸的颗粒,以实现有效的可见光散射。 连续和分散相具有定制的折射率,使得漫反射器对于倾斜入射光基本上比通常入射光更强地透射来自光源的光,以提供灯泡隐藏特性。

    Optical element for lateral light spreading in back-lit displays and system using same
    100.
    发明授权
    Optical element for lateral light spreading in back-lit displays and system using same 有权
    用于背光显示器中的横向光扩散的光学元件和使用它的系统

    公开(公告)号:US07903194B2

    公开(公告)日:2011-03-08

    申请号:US11166723

    申请日:2005-06-24

    IPC分类号: G02F1/1335

    摘要: A display system has a controlled transmission mirror disposed between the light sources and the display panel. The controlled transmission mirror includes a light-diverting input coupling element facing the light sources, a light-diverting output coupling element facing the display panel and a multilayer reflector between the input and output coupling elements. The controlled transmission mirror laterally spreads the light, making the illumination of the panel more uniform. The controlled transmission mirror may include a transparent substrate between the input and output coupling elements for additional light spreading. The light sources may be positioned within the controlled transmission mirror, rather than behind it. The output coupling element can be insensitive to polarization, so the light passing out of the controlled transmission mirror is unpolarized, or the output coupling element can be polarization sensitive so that the output light is polarized.

    摘要翻译: 显示系统具有设置在光源和显示面板之间的受控的透射镜。 受控透射镜包括面向光源的光转向输入耦合元件,面向显示面板的光转向输出耦合元件和在输入和输出耦合元件之间的多层反射器。 受控的传输镜横向扩展光,使得面板的照明更均匀。 受控透射反射镜可以包括在输入和输出耦合元件之间的透明衬底,用于附加的光扩散。 光源可以位于受控的透射镜内,而不是在其后面。 输出耦合元件对极化不敏感,因此从受控透射镜反射出的光是非偏振的,或者输出耦合元件可以是偏振敏感的,使得输出光被极化。