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    POLARIZATION RECOVERY IN A DIRECTIONAL DISPLAY DEVICE
    3.
    发明公开
    POLARIZATION RECOVERY IN A DIRECTIONAL DISPLAY DEVICE 审中-公开
    极化恢复在某种意义上相关的显示设备

    公开(公告)号：EP2850483A2

    公开(公告)日：2015-03-25

    申请号：EP13790274.8

    申请日：2013-05-15

    Applicant: RealD Inc.

    Inventor： ROBINSON, Michael, G. ,  SHARP, Gary, D. ,  WOODGATE, Graham, J. ,  HARROLD, Jonathan ,  SCHUCK, Miller, H.

    IPC: G02B27/26 ,  G02B27/22 ,  G02F1/1335

    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.

    WIDE ANGLE IMAGING DIRECTIONAL BACKLIGHTS
    4.
    发明公开
    WIDE ANGLE IMAGING DIRECTIONAL BACKLIGHTS 审中-公开
    威士忌黛薇薇

    公开(公告)号：EP2850472A1

    公开(公告)日：2015-03-25

    申请号：EP13790809.1

    申请日：2013-05-15

    Applicant: RealD Inc.

    Inventor： ROBINSON, Michael, G. ,  WOODGATE, Graham, J. ,  HARROLD, Jonathan ,  SCHUCK, Miller, H.

    IPC: G02B6/10 ,  G02F1/13357

    Abstract: An imaging directional backlight apparatus including a waveguide, a light source array, for providing large area directed illumination from localized light sources. The waveguide may include a stepped structure, in which the steps may further include extraction features optically hidden to guided light, propagating in a first forward direction. Returning light propagating in a second backward direction may be refracted, diffracted, or reflected by the features to provide discrete illumination beams exiting from the top surface of the waveguide. Viewing windows are formed through imaging individual light sources and hence defines the relative positions of system elements and ray paths. The uncorrected system creates non-illuminated void portions when viewed off-axis preventing uniform wide angle 2D illumination modes. The system may be corrected to remove this non uniformity at wide angles through the introduction of additional sources away from the system's object plane, additional imaging surfaces, and/or by altering ray paths.

    Abstract translation: 一种成像方向性背光装置，包括用于从局部光源提供大面积定向照明的波导，光源阵列。 波导可以包括阶梯式结构，其中步骤还可以包括光引导光隐藏的提取特征，在第一向前方向上传播。 在第二反向传播的返回光可以由特征折射，衍射或反射，以提供离开波导的顶表面离散的照明光束。 通过成像各个光源形成观察窗，因此定义了系统元件和射线路径的相对位置。 当从偏轴观察时，未校正的系统产生未被照明的空隙部分，防止均匀的广角2D照明模式。 可以通过引入远离系统的物体平面，附加成像表面和/或改变射线路径的附加源来广角地消除该不均匀性的系统。

    CROSSTALK SUPPRESSION IN A DIRECTIONAL BACKLIGHT
    6.
    发明公开
    CROSSTALK SUPPRESSION IN A DIRECTIONAL BACKLIGHT 有权
    关于管辖权还原在某种意义上依赖背光照明

    公开(公告)号：EP2850487A1

    公开(公告)日：2015-03-25

    申请号：EP13790267.2

    申请日：2013-05-15

    Applicant: RealD Inc.

    Inventor： ROBINSON, Michael, G. ,  WOODGATE, Graham, J. ,  HARROLD, Jonathan ,  SHARP, Gary, D. ,  SCHUCK, Miller, H.

    IPC: G02F1/13357 ,  F21S2/00 ,  F21V8/00

    CPC classification number: H04N13/315 ,  G02B6/0048 ,  G02B6/0051 ,  G02B6/0055 ,  G02B6/0068 ,  G02B27/22 ,  H04N13/32

    Abstract: A directional backlight for a transmissive spatial light modulator comprises a waveguide having an input end, first and second, opposed guide surfaces for guiding light along the waveguide, and a reflective end facing the input end for reflecting light from the input light back through the waveguide. An array of light sources that output light predominantly in an emission band and in a conversion band are disposed across the input end of the waveguide and light is directed into respective optical windows in output directions distributed in the lateral direction in dependence on the input positions. To achieve crosstalk suppression, disposed between the input end and the light sources is a reflection reduction element that comprises a filter arranged to absorb light in the conversion band preferentially over light in the emission band, thereby reducing reflections of light incident on the input end after reflection from the reflective end.

    SOURCE CONDITIONING FOR IMAGING DIRECTIONAL BACKLIGHTS
    8.
    发明公开
    SOURCE CONDITIONING FOR IMAGING DIRECTIONAL BACKLIGHTS 审中-公开
    源处理对于图回头看灯

    公开(公告)号：EP2850359A1

    公开(公告)日：2015-03-25

    申请号：EP13790013.0

    申请日：2013-05-17

    Applicant: RealD Inc.

    Inventor： ROBINSON, Michael, G. ,  WOODGATE, Graham, J. ,  HARROLD, Jonathan ,  SCHUCK, Miller, H.

    IPC: F21S2/00 ,  F21V8/00 ,  G02F1/13357

    Abstract: Disclosed is an imaging directional backlight apparatus for providing large area uniform directed illumination from localized light sources. Within an exemplary optical valve system, a waveguide comprises a stepped structure, where the steps comprise extraction features hidden to guided light, propagating in a first forward direction. Returning light propagating in a second backward direction may be refracted, diffracted, or reflected by the features to provide discrete illumination beams exiting from the top surface of the waveguide. Such controlled illumination may provide for efficient, multi-user autostereoscopic displays as well as improved 2D display functionality. Illumination uniformity is provided by the positioning, packaging, and optically modifying of individual input sources. The latter employs non-imaging and refractive optics.

    DIRECTIONAL BACKLIGHT
    9.
    发明公开
    DIRECTIONAL BACKLIGHT 审中-公开
    定向背光

    公开(公告)号：EP2850488A1

    公开(公告)日：2015-03-25

    申请号：EP13791332.3

    申请日：2013-05-17

    Applicant: RealD Inc.

    Inventor： HARROLD, Jonathan ,  WOODGATE, Graham, J. ,  ROBINSON, Michael, G. ,  SCHUCK, Miller, H.

    IPC: G02F1/13357 ,  F21S2/00 ,  F21V8/00

    CPC classification number: G02B6/0028 ,  G02B6/0048 ,  G02B27/22 ,  G02B27/2242 ,  G02B27/225 ,  G02B27/2264

    Abstract: Disclosed is an optical inline light guiding apparatus which may include a substantially parallel planar light expansion section and a light extraction section comprising a stepped structure, in which the steps may be extraction features and guiding features. Such controlled illumination may provide for efficient, multi-user autostereoscopic displays with wide viewing freedom, high efficiency and low cross talk and other directional display uses.

    Abstract translation: 公开了一种光学直列式光导设备，其可以包括基本平行的平面光扩展部分和包括阶梯结构的光提取部分，其中阶梯可以是提取特征和引导特征。 这种受控照明可提供具有宽视角自由度，高效率和低串扰以及其他定向显示用途的高效率，多用户自动立体显示器。

    OPTICAL SYSTEMS WITH COMPACT BACK FOCAL LENGTHS
    10.
    发明公开
    OPTICAL SYSTEMS WITH COMPACT BACK FOCAL LENGTHS 审中-公开
    紧凑型切割宽幅光学系统

    公开(公告)号：EP2732335A2

    公开(公告)日：2014-05-21

    申请号：EP12811462.6

    申请日：2012-07-16

    Applicant: RealD Inc.

    Inventor： SCHUCK, Miller, H.

    IPC: G03B21/14 ,  G03B35/22 ,  G02B27/22

    CPC classification number: G02B27/283 ,  G03B21/14 ,  G03B35/22

    Abstract: Optical systems, such as 2-D and 3-D projection systems, may be configured to have a compact back focal length to allow for more compact projection lenses, lower throw ratios, improved contrast, or any combination thereof. In an embodiment, an optical system may include a relay element configured to form an intermediate image having a focal point proximate to a projection lens.

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