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    THIN HOLLOW BACKLIGHTS WITH BENEFICIAL DESIGN CHARACTERISTICS
    5.
    发明申请
    THIN HOLLOW BACKLIGHTS WITH BENEFICIAL DESIGN CHARACTERISTICS 有权
    具有优点设计特性的中空背光

    公开(公告)号：US20100156953A1

    公开(公告)日：2010-06-24

    申请号：US12600862

    申请日：2008-05-19

    申请人： Timothy J. Nevitt ,  Timothy J. Hebrink ,  Michael F. Weber ,  Rolf W. Biernath ,  David G. Freier ,  John A. Wheatley ,  Andrew J. Ouderkirk ,  Charles D. Hoyle ,  Kristopher J. Derks

    发明人： Timothy J. Nevitt ,  Timothy J. Hebrink ,  Michael F. Weber ,  Rolf W. Biernath ,  David G. Freier ,  John A. Wheatley ,  Andrew J. Ouderkirk ,  Charles D. Hoyle ,  Kristopher J. Derks

    IPC分类号： G09G5/10

    CPC分类号： F21V7/04 ,  G02B6/0055 ,  G02B6/0056 ,  G02B6/0068 ,  G02B6/0096 ,  G02F1/133603 ,  G02F1/133605 ,  G02F1/13362

    摘要： A backlight unit (10) has a hollow cavity (16) instead of employing a light guide. One or more light sources (24a-c), such as LEDs, are arranged to emit light into the cavity, which is formed by a front (12) and a back reflector (14). The backlight is typically of the edge-lit type. The backlight can have a large area, is thin and consists of fewer components than conventional devices. Its design permits light recycling. The unit emits light of a predefined polarisation and can be arranged to have desired horizontal/vertical viewing angle properties. Light is uniformly distributed within the guide and the light output (20b, 2Od) is substantially collimated. Such backlights occupy a specific region in a parameter space defined by two parameters: first, the ratio of the output emission area to the total source emission area should lie in the range 0.0001 to 0.1; and second, the ratio of the SEP to the height of the cavity (H) should be in the range 3 to 10, where the SEP is an average plan view source separation, a special measure of the average spacing of light sources in the plane of the unit. There is also a discussion on the required number of light sources N, their arrangement near the periphery of the cavity, as well as the shape and size of the output emission area. A required minimum brightness uniformity (VESA) value to be maintained, when a subset of Madjacent sources is switched off (where M is at least 0.1 N or M>2 or both), is also disclosed. The backlight can be used for a display or for general lighting purposes.

    摘要翻译： 背光单元（10）具有中空腔（16）而不是使用光导。 布置一个或多个光源（24a-c），诸如LED，以将光发射到由前部（12）和后部反射器（14）形成的空腔中。 背光通常是边缘照明型。 背光源可以具有较大的面积，较薄并且由比传统设备更少的组件组成。 其设计允许光回收。 该单元发射预定极化的光，并且可以被布置成具有期望的水平/垂直视角特性。 光均匀分布在引导件内，并且光输出（20b，20d）基本准直。 这样的背光灯占据由两个参数定义的参数空间中的特定区域：首先，输出排放面积与总排放源面积的比值应在0.0001到0.1的范围内; 第二，SEP与空腔高度的比值（H）应在3到10的范围内，其中SEP是平均平面视图源分离，平面中光源的平均间距的特殊测量 的单位。 还有关于所需数量的光源N的讨论，它们在空腔的周边附近的布置以及输出发射区域的形状和尺寸。 还公开了当Madjacent源的子集（其中M为至少0.1N或M> 2或两者）时要维持的所需的最小亮度均匀性（VESA）值。 背光可用于显示器或用于一般照明目的。

    LOW LAYER COUNT REFLECTIVE POLARIZER WITH OPTIMIZED GAIN
    7.
    发明申请
    LOW LAYER COUNT REFLECTIVE POLARIZER WITH OPTIMIZED GAIN 有权
    具有优化增益的低层反射偏振器

    公开(公告)号：US20110102891A1

    公开(公告)日：2011-05-05

    申请号：US12935500

    申请日：2009-03-27

    申请人： Kristopher J. Derks ,  Michael F. Weber ,  Shandon D. Hart ,  Carl A. Stover

    发明人： Kristopher J. Derks ,  Michael F. Weber ,  Shandon D. Hart ,  Carl A. Stover

    IPC分类号： G02B5/30

    CPC分类号： G02B5/3066 ,  G02B5/3041 ,  G02B5/305 ,  G02B5/3083 ,  G02B27/283

    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。

    Low layer count reflective polarizer with optimized gain
    8.
    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

    申请人： Kristopher J. Derks ,  Michael F. Weber ,  Shandon D. Hart ,  Carl A. Stover

    发明人： Kristopher J. Derks ,  Michael F. Weber ,  Shandon D. Hart ,  Carl A. Stover

    IPC分类号： G02B5/30 ,  G02B27/28

    CPC分类号： G02B5/3066 ,  G02B5/3041 ,  G02B5/305 ,  G02B5/3083 ,  G02B27/283

    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。

    Polarizing beam splitter
    9.
    发明授权
    Polarizing beam splitter 有权
    极化分束器

    公开(公告)号：US06609795B2

    公开(公告)日：2003-08-26

    申请号：US09878575

    申请日：2001-06-11

    申请人： Michael F. Weber ,  Charles L. Bruzzone ,  Peter D. Condo ,  Kevin M. Hamer ,  Timothy J. Hebrink ,  William W. Merrill

    发明人： Michael F. Weber ,  Charles L. Bruzzone ,  Peter D. Condo ,  Kevin M. Hamer ,  Timothy J. Hebrink ,  William W. Merrill

    IPC分类号： G03B2100

    CPC分类号： G02B27/283 ,  Y10T428/24942

    摘要： The present invention provides a unique polarizing beam splitter (PBS) that is suitable for use in projection systems and displays. The PBS contains at least one prism having at least one major surface and having a refractive index of at least about 1.6 and a birefringent film disposed on the major surface of the prism. The birefringent film is a multi-layer film having layers of at least a first material and a second material. After uniaxial stretching, the film exhibits a refractive index difference of less than about 0.15 units in the stretched direction.

    摘要翻译： 本发明提供了适用于投影系统和显示器的独特的偏振分束器（PBS）。 PBS包含至少一个具有至少一个主表面并具有至少约1.6的折射率的棱镜和设置在棱镜的主表面上的双折射膜。 双折射膜是具有至少第一材料和第二材料层的多层膜。 在单轴拉伸之后，膜在拉伸方向上的折射率差小于约0.15单位。