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    Polarization conversion systems for stereoscopic projection
    31.
    发明授权
    Polarization conversion systems for stereoscopic projection 有权

    公开(公告)号：US11143948B2

    公开(公告)日：2021-10-12

    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 ,  H04N13/341 ,  G02B27/28 ,  G02B30/24 ,  G02B30/25 ,  G03B21/14 ,  G03B21/28 ,  G03B35/22

    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.

    Distortion matching polarization conversion systems and methods thereof
    32.
    发明授权
    Distortion matching polarization conversion systems and methods thereof 有权

    公开(公告)号：US10459321B2

    公开(公告)日：2019-10-29

    申请号：US15348186

    申请日：2016-11-10

    Applicant: RealD Inc.

    Inventor： Miller H. Schuck ,  Douglas J. McKnight

    IPC: G03B21/14 ,  G02B27/28 ,  G02F1/01 ,  G03B21/20

    Abstract: Optical systems having at least one polarization beam splitter (PBS) are operable to receive randomly-polarized light bundles from a projector lens. The PBS is further operable to direct light bundles having a state of polarization (SOP) along a light path and operable to direct other light bundles having a different SOP along different light paths. The light paths have optical path lengths which may differ. Each light path produces an image having a distortion which may differ from the distortion of an image produced by a different light path. A compensation in a light path is operable to convert a non-compensated distortion of an image into a compensated distortion that more closely matches the distortion of images in other light paths.

    Polarization conversion systems for stereoscopic projection
    35.
    发明授权
    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：US09594298B2

    公开(公告)日：2017-03-14

    申请号：US14485256

    申请日：2014-09-12

    Applicant: RealD Inc.

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

    IPC: G02B27/00 ,  G03B35/26 ,  G02B27/26 ,  G02B27/28 ,  H04N13/04 ,  G03B21/14 ,  G02B27/22 ,  G03B21/28 ,  G03B35/22

    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。

    Polarization recovery in a directional display device
    39.
    发明授权
    Polarization recovery in a directional display device 有权

    公开(公告)号：US09235057B2

    公开(公告)日：2016-01-12

    申请号：US13837466

    申请日：2013-03-15

    Applicant: REALD INC.

    Inventor： Michael G. Robinson ,  Gary D. Sharp ,  Graham J. Woodgate ,  Jonathan Harrold ,  Miller H. Schuck

    IPC: G02B27/26 ,  G02B5/30 ,  G02B27/28 ,  G02B27/22 ,  F21V13/12 ,  F21V8/00

    CPC classification number: G02B6/0048 ,  F21V13/12 ,  G02B6/0056 ,  G02B27/225 ,  G02B27/2264

    Abstract: Disclosed is an imaging directional backlight polarization recovery apparatus including an imaging directional backlight with at least a polarization sensitive reflection component with optional polarization transformation and redirection elements. Viewing windows may be formed through imaging individual light sources and hence defines the relative positions of system elements and ray paths. The base imaging directional backlight systems provide substantially unpolarized light primarily for the illumination of liquid crystal displays (LCDs) resulting in at least 50% loss in light output when using a conventional sheet polarizer as input to the display. The invention herein introduces a polarization sensitive reflecting element to separate desired and undesired polarization states for the purposes of transformation and redirection of the reflected light for usable illumination. Polarization transformation and redirection can be provided by additional components such as retarder films and specular mirror surfaces.

    Laser beam scanned display apparatus and method thereof
    40.
    发明申请
    Laser beam scanned display apparatus and method thereof 有权
    激光束扫描显示装置及其方法

    公开(公告)号：US20150177530A1

    公开(公告)日：2015-06-25

    申请号：US14578129

    申请日：2014-12-19

    Applicant: RealD Inc.

    Inventor： Kevin Curtis ,  Gary D. Sharp ,  Miller H. Schuck

    IPC: G02B27/26 ,  G02B27/22 ,  G03B21/14

    CPC classification number: G02B27/26 ,  B82Y20/00 ,  G02B6/005 ,  G02B6/0056 ,  G02B27/22 ,  G03B21/14 ,  G03B21/204 ,  G03B21/604 ,  G03B35/24 ,  H04N9/3129 ,  H04N9/3141 ,  H04N9/3147 ,  H04N9/3197 ,  H04N13/31 ,  Y10S977/774 ,  Y10S977/952

    Abstract: Generally, near seamless electronics displays may be employed in cinema and exhibition applications. Laser scanned displays may be enabled such that the display may display three dimensional (“3D”) content. A first method to enable a laser scanned display for 3D content may employ polarization, with or without polarization conversion and another method may employ multiple colors. Additionally, the envelope function that may be employed across the display may be achieved by changing laser power as a beam is scanned on the screen or by changing the dwell time of the laser beam on the pixels. One method of minimizing the effects of seams in the screen may be to reduce the screen resolution near the seams by screen design and/or laser beam dwell time or illumination energy.

    Abstract translation: 通常，在电影和展览应用中可以使用靠近无缝电子显示器。 可以启用激光扫描显示器，使得显示器可以显示三维（“3D”）内容。 启用3D内容的激光扫描显示的第一种方法可以采用极化，具有或不具有偏振转换，另一种方法可以采用多种颜色。 另外，可以在显示器上使用的包络函数可以通过在屏幕上扫描光束时改变激光功率或通过改变激光束在像素上的停留时间来实现。 在屏幕中最小化接缝效果的一种方法可能是通过屏幕设计和/或激光束驻留时间或照明能量来减小接缝附近的屏幕分辨率。

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