知搜-全球专利检索

  1. Login
  2. Sign Up

Search Results

61 records (took 0.024 seconds)

    Polarization conversion systems for stereoscopic projection
    41.
    发明申请
    Polarization conversion systems for stereoscopic projection 有权
    用于立体投影的极化转换系统

    公开(公告)号：US20150002819A1

    公开(公告)日：2015-01-01

    申请号：US14485256

    申请日：2014-09-12

    Applicant: RealD Inc.

    Inventor： Miller H. Schuck ,  Michael G. Robinson ,  Gary D. Sharp

    IPC: G02B27/26 ,  G03B21/14

    CPC classification number: G03B35/26 ,  G02B27/2264 ,  G02B27/26 ,  G02B27/283 ,  G03B21/142 ,  G03B21/28 ,  G03B35/22 ,  H04N13/341

    Abstract: A polarization conversion system (PCS) is located in the output light path of a projector. The PCS may include a polarizing beam splitter, a polarization rotating element, a reflecting element, and a polarization switch. Typically, a projector outputs randomly-polarized light. This light is input to the PCS, in which the PCS separates p-polarized light and s-polarized light at the polarizing beam splitter. P-polarized light is directed toward the polarization switch on a first path. The s-polarized light is passed on a second path through the polarization rotating element (e.g., a half-wave plate), thereby transforming it to p-polarized light. A reflecting element directs the transformed polarized light (now p-polarized) along the second path toward the polarization switch. The first and second light paths are ultimately directed toward a projection screen to collectively form a brighter screen image in cinematic applications utilizing polarized light for three-dimensional viewing.

    Abstract translation: 偏振转换系统（PCS）位于投影仪的输出光路中。 PCS可以包括偏振分束器，偏振旋转元件，反射元件和偏振开关。 通常，投影仪输出随机偏振光。 该光被输入到PCS，其中PCS在偏振分束器处分离p偏振光和s偏振光。 P偏振光在第一路径上被引向偏振开关。 s偏振光在穿过偏振旋转元件（例如半波片）的第二路径上通过，从而将其变换为p偏振光。 反射元件将沿着第二路径的变换的偏振光（现在p偏振光）引向偏振开关。 第一和第二光路最终定向到投影屏幕，以在使用偏振光进行三维观看的电影应用中共同形成更亮的屏幕图像。

    Waveplate compensation in projection polarization conversion systems
    43.
    发明申请
    Waveplate compensation in projection polarization conversion systems 有权
    投影偏振转换系统波片补偿

    公开(公告)号：US20130100414A1

    公开(公告)日：2013-04-25

    申请号：US13710356

    申请日：2012-12-10

    Applicant: Reald Inc.

    Inventor： David A. Coleman ,  Miller H. Schuck ,  Gary D. Sharp

    IPC: G02B27/26 ,  G03B21/14 ,  G02B27/28

    CPC classification number: G02B27/26 ,  G02B27/283 ,  G03B21/14 ,  G03B35/20 ,  G03B35/26 ,  H04N13/363

    Abstract: Three dimensional projection systems may be single projector or multiple projector systems. These 3D projection systems may include a one or more polarization conversion systems (PCS). Each PCS may be designed for relatively small throw ratios and thus, may be designed to accommodate the small throw ratios. Each PCS may include a polarizing beam splitter, a first optical stack, a reflector and a second quarter wave retarder. The first optical stack may include a rotator, a polarizer, a polarization switch and a first quarter wave retarder. Each PCS may receive light from a respective projector, and the PBS in each PCS may direct the light toward the first optical stacks. The light may be converted to a different polarization state as it passes through the first optical stack. The converted light may then be re-directed by a reflecting element to a second quarter wave retarder. The second quarter wave retarder may convert linearly polarized light to circularly polarized light.

    Abstract translation: 三维投影系统可以是单个投影仪或多个投影仪系统。 这些3D投影系统可以包括一个或多个偏振转换系统（PCS）。 每个PCS可以被设计用于相对较小的投掷比，并且因此可被设计成适应小投掷比。 每个PCS可以包括偏振分束器，第一光学堆叠，反射器和第二四分之一波长延迟器。 第一光学堆叠可以包括旋转器，偏振器，偏振开关和第一四分之一波长延迟器。 每个PCS可以从相应的投影仪接收光，并且每个PCS中的PBS可以将光引导到第一光学堆叠。 当光通过第一光学堆叠时，光可以被转换成不同的偏振状态。 转换后的光可以被反射元件重新定向到第二个四分之一波长延迟器。 第二四分之一波长延迟器可以将线性偏振光转换成圆偏振光。

    3D projection system
    44.
    发明授权
    3D projection system 有权

    公开(公告)号：US10739611B2

    公开(公告)日：2020-08-11

    申请号：US16221107

    申请日：2018-12-14

    Applicant: RealD Inc.

    Inventor： Miller H. Schuck ,  Michael G. Robinson ,  Gary D. Sharp

    IPC: G02B30/35 ,  G02B30/25 ,  H04N13/337 ,  H04N13/341 ,  G02B30/24 ,  G02B26/00 ,  G02B13/00

    Abstract: A polarization conversion system separates light from an unpolarized image source into a first state of polarization (SOP) and an orthogonal second SOP, and directs the polarized light on first and second light paths. The SOP of light on only one of the light paths is transformed to an orthogonal state such that both light paths have the same SOP. A polarization modulator temporally modulates the light on the first and second light paths to first and second output states of polarization. First and second projection lenses direct light on the first and second light paths toward a projection screen to form substantially overlapping polarization encoded images. The polarization modulator may be located before or after the projection lenses. The polarization-encoded images may be viewed using eyewear with appropriate polarization filters.

    Polarization conversion systems for stereoscopic projection
    45.
    发明申请
    Polarization conversion systems for stereoscopic projection 审中-公开

    公开(公告)号：US20190011825A1

    公开(公告)日：2019-01-10

    申请号：US15933639

    申请日：2018-03-23

    Applicant: RealD Inc.

    Inventor： Miller H. Schuck ,  Michael G. Robinson ,  Gary D. Sharp

    IPC: G03B35/26 ,  G03B35/22 ,  G03B21/28 ,  G02B27/22 ,  H04N13/341 ,  G02B27/28 ,  G02B27/26 ,  G03B21/14

    Abstract: A polarization conversion system (PCS) is located in the output light path of a projector. The PCS may include a polarizing beam splitter, a polarization rotating element, a reflecting element, and a polarization switch. Typically, a projector outputs randomly-polarized light. This light is input to the PCS, in which the PCS separates p-polarized light and s-polarized light at the polarizing beam splitter. P-polarized light is directed toward the polarization switch on a first path. The s-polarized light is passed on a second path through the polarization rotating element (e.g., a half-wave plate), thereby transforming it to p-polarized light. A reflecting element directs the transformed polarized light (now p-polarized) along the second path toward the polarization switch. The first and second light paths are ultimately directed toward a projection screen to collectively form a brighter screen image in cinematic applications utilizing polarized light for three-dimensional viewing.

    High dynamic range, high contrast projection systems
    48.
    发明授权
    High dynamic range, high contrast projection systems 有权

    公开(公告)号：US09625745B2

    公开(公告)日：2017-04-18

    申请号：US14541818

    申请日：2014-11-14

    Applicant: RealD Inc.

    Inventor： Gary D. Sharp ,  Miller H. Schuck ,  Douglas J. McKnight

    IPC: G03B21/28 ,  H04N9/31 ,  G02F1/01 ,  G03B21/14 ,  G03B21/20

    CPC classification number: G02F1/0136 ,  G03B21/14 ,  G03B21/2073 ,  G03B21/28 ,  H04N9/3141 ,  H04N9/3167

    Abstract: Display devices with high dynamic ranges approaching the limitations of the human eye are discussed herein. High dynamic range projections systems may be 2D or 3D and devices may or may not be implemented with polarization preserving optics for high efficiency. In one embodiment, 2D HDR projection systems may compensate the modulator for varying transmission and contrast versus field of view. In another embodiment, 3D HDR projection systems may include a global or pixelated/segmented modulator. The global or pixelated/segmented modulator may be included in a stereoscopic polarization switch or in a polarization-preserving stereoscopic projection system. Additionally, a combination of global/global or pixelated/pixelated, or global/pixelated modulators may be used.

Patent Agency Ranking