公开(公告)号：EP2361401A2

公开(公告)日：2011-08-31

申请号：EP09831004.8

申请日：2009-12-01

Applicant: RealD Inc.

Inventor： SCHUCK, Miller, H. ,  ROBINSON, Michael, G. ,  MCKNIGHT, Douglas, J. ,  SHARP, Gary, D.

IPC: G03B21/00

CPC classification number: G02B27/26 ,  G02B27/22 ,  G02F1/1313 ,  G03B35/26 ,  H04N13/324 ,  H04N13/337 ,  H04N13/363

Abstract: Proposed are various embodiments of projection systems that generally provide stereoscopic images. The projection systems act to split a spatially separated image in a stereoscopic image frame and superimpose the left- and right-eye images on a projection screen with orthogonal polarization states. The embodiments are generally well suited to liquid crystal polarization based projection systems and may use advanced polarization control.

公开(公告)号：EP2240825A1

公开(公告)日：2010-10-20

申请号：EP09705162.7

申请日：2009-01-28

Applicant: RealD Inc.

Inventor： COLEMAN, David, A. ,  SHARP, Gary, D.

IPC: G03B21/56

CPC classification number: G03B21/60 ,  F16H21/14 ,  G02B27/26 ,  G03B35/16 ,  G03B35/26 ,  Y10T74/18232 ,  Y10T428/24802

Abstract: Polarization preserving front projection screens and diffusers provide optimum polarization preservation for stereoscopic 3D viewing, as well as improved light control for enhanced brightness, uniformity, and contrast for both 2D and 3D systems. Generally, the disclosed screens direct light from a projector toward viewers within a diffusion locus, while maintaining optimum gain characteristics. More specifically, light incident on a region of the front projection screen from a predetermined projection direction is reflected by an engineered surface to a predetermined diffusion locus after undergoing substantially single reflections. The engineered surface, comprised of generating kernels, is used to optimally diffuse illumination light into a range of viewing angles, within the diffusion locus, with suitable gain profile, while optimally preserving polarization for 3D applications. Such a screen, when combined with matched polarization analyzing eyewear, provides extremely low cross-talk from any observation point.

公开(公告)号：EP2361401B1

公开(公告)日：2017-09-06

申请号：EP09831004.8

申请日：2009-12-01

Applicant: RealD Inc.

Inventor： SCHUCK, Miller, H. ,  ROBINSON, Michael, G. ,  MCKNIGHT, Douglas, J. ,  SHARP, Gary, D.

IPC: G03B21/00 ,  G03B35/26 ,  G02F1/13 ,  G02B27/22 ,  G02B27/26 ,  H04N13/04

CPC classification number: G02B27/26 ,  G02B27/22 ,  G02F1/1313 ,  G03B35/26 ,  H04N13/324 ,  H04N13/337 ,  H04N13/363

Abstract: Proposed are various embodiments of projection systems that generally provide stereoscopic images. The projection systems act to split a spatially separated image in a stereoscopic image frame and superimpose the left- and right-eye images on a projection screen with orthogonal polarization states. The embodiments are generally well suited to liquid crystal polarization based projection systems and may use advanced polarization control.

Abstract translation: 提出了通常提供立体图像的投影系统的各种实施例。 投影系统用于在立体图像帧中分离空间分离的图像，并将左眼图像和右眼图像叠加在具有正交偏振状态的投影屏幕上。 这些实施例通常非常适合于基于液晶偏振的投影系统，并且可以使用先进的偏振控制。

公开(公告)号：EP2449419A2

公开(公告)日：2012-05-09

申请号：EP10800306.2

申请日：2010-06-29

Applicant: RealD Inc.

Inventor： SCHUCK, Miller, H. ,  ROBINSON, Michael, G. ,  McKNIGHT, Douglas, J. ,  SHARP, Gary, D.

IPC: G02B27/22 ,  G03B21/14 ,  G03B35/00

CPC classification number: G02F1/133528 ,  G02B17/045 ,  G02B27/143 ,  G02B27/26 ,  G03B35/26

Abstract: Projection systems and methods for providing stereoscopic images viewed through passive polarizing eyewear. The systems relate to projectors that create left and right eye images simultaneously and often as side-by-side images on the image modulator. The systems act to superimpose the spatially separated images on a projection screen with alternate polarization states. The embodiments are best suited to liquid crystal polarization based projection systems and use advanced polarization control.

Abstract translation: 通过无源偏振眼镜提供立体图像的投影系统和方法。 该系统涉及同时产生左眼图像和右眼图像的投影仪，并且经常作为图像调制器上的并排图像。 这些系统用于将空间分离的图像叠加在具有交替偏振状态的投影屏幕上。 这些实施例最适合于基于液晶偏振的投影系统并且使用先进的偏振控制。

公开(公告)号：EP1561146B1

公开(公告)日：2010-07-28

申请号：EP03783633.5

申请日：2003-11-14

Applicant: RealD Inc.

Inventor： CHEN, Jainmin ,  ROBINSON, Michael, G. ,  SHARP, Gary, D. ,  BIRGE, Jonathan, R.

IPC: G02B5/30 ,  G02B27/28 ,  G02F1/1335 ,  H04N9/31 ,  G02F1/13363

CPC classification number: H04N9/3167 ,  G02B27/288 ,  H04N9/3105

Abstract: The present application describes color management architecture for a three-panel projection system that utilizes color selective polarization filters (CSPF) and polarizing beam splitting elements (1104,1106,11089). An exemplary embodiment describes a color management architecture with a dichroic input beam splitter (1302) and three polarizing beam splitters (1104,1106,1108). An output polarizing beam splitter is used as an analyzer. The color management system architecture can isolate any color channel from those remaining whose separation and combination are then carried out by a single beamsplitting element. The disclosed embodiments also provide an improvement in the ANSI contrast. In some embodiments, an achromatic quarter-wave plate is used in combination with a color filter to block the light reflected from projection optics.

公开(公告)号：EP2707772B1

公开(公告)日：2018-01-03

申请号：EP12782590.9

申请日：2012-05-14

Applicant: RealD Inc.

Inventor： COLEMAN, David, A. ,  SHARP, Gary, D. ,  CHEN, Jianmin

IPC: G02F1/1335 ,  G02F1/13363 ,  G03B21/20 ,  G03B35/26 ,  G02B5/30 ,  G02B27/26 ,  G02B27/28 ,  H04N13/04

CPC classification number: G02B27/26 ,  G02B5/3083 ,  G02B27/288 ,  G02F1/133528 ,  G02F1/13363 ,  G02F2001/133638 ,  G02F2413/02 ,  G02F2413/07 ,  G03B21/14 ,  G03B21/206 ,  G03B21/2073 ,  G03B35/26 ,  H04N13/337

Abstract: Disclosed embodiments include stereoscopic systems having at least one compensator operable to reduce the sensitivity of polarization control over incidence angle of image source optics and analyzer optics. In an exemplary embodiment, the disclosed compensator is operable to compensate polarization changes induced by optics at either or both the image source subsystem and the analyzer subsystem, in which the polarization changes would be operable to cause leakage at the analyzer subsystem if uncompensated. As such, the disclosed compensators and compensation techniques are operable to reduce leakage at the analyzer subsystem even if the disclosed compensator may be located at the analyzer subsystem.

公开(公告)号：EP2823352A1

公开(公告)日：2015-01-14

申请号：EP13758536.0

申请日：2013-03-05

Applicant: RealD Inc.

Inventor： SHARP, Gary, D. ,  COLEMAN, David, A.

IPC: G03B21/56 ,  G03B21/00

Abstract: A front projection screen is provided having a first portion of material and a second portion of material. The first and second portions of material may have an undercut edge profile, and the first and second portions of material may be perforated, such that the perforations allow the first and second portions of material to be at least somewhat acoustically transmissive while substantially maintaining optical efficiency from the front side of the front projection screen. Such optical efficiency has particular utility in stereoscopic projection applications utilizing polarized encoded light.

公开(公告)号：EP2593829A2

公开(公告)日：2013-05-22

申请号：EP11807480.6

申请日：2011-07-13

Applicant: RealD Inc.

Inventor： SHARP, Gary, D. ,  CHEN, Jianmin ,  ROBINSON, Michael, G.

IPC: G02B27/26 ,  G02F1/1335 ,  G02F1/13363 ,  G03B21/00

CPC classification number: H04N13/337 ,  G02B27/26 ,  G02F1/133528 ,  G02F1/133634 ,  G02F1/13471 ,  G02F1/1395 ,  G02F2001/133531 ,  G02F2413/11 ,  H04N13/363

Abstract: Generally, this disclosure concerns the angle sensitivity of polarization switch elements and the resulting impact of the ray direction on performance. More specifically, apparatus and techniques for compensating the angular sensitivity of liquid crystal (LC) polarization switches are described that enhance the performance of polarization switches. For example, a polarization switch is disclosed that transforms linearly polarized light of an initial polarization orientation that includes a first and second liquid crystal cell with a compensator located between the LC cells. The compensator layer is operable to enhance the field of view through the polarization switch. Such compensation techniques are particularly useful for short-throw projection environments.

公开(公告)号：EP1151346B1

公开(公告)日：2012-04-25

申请号：EP99968132.3

申请日：1999-12-17

Applicant: RealD Inc.

Inventor： SHARP, Gary, D. ,  JOHNSON, Kristina, M. ,  ROBINSON, Michael, Geraint ,  CHEN,Jianmin

IPC: G02F1/1347 ,  G02F1/13363 ,  G02F1/141 ,  C09K19/02 ,  C09K19/52

CPC classification number: G02F1/13471 ,  G02F1/141 ,  G02F2001/133638 ,  G02F2203/02

Abstract: This invention provides achromatic compound retarders, achromatic polarization switches, and achromatic shutters using the liquid crystal compound retarders. It further provides achromatic variable retardance smectic and nematic liquid crystal retarders. The achromatic compound retarders according to the invention are used to create achromatic inverters for display applications. The display comprises one or more retarders (320a-320n) having in-plane retardance and in-plane orientation, at least one of the retarders being an actively controlled liquid crystal retarder, and a ferroelectric liquid crystal display (370), wherein the one or more retarders work in combination with the ferroelectric liquid crystal display (370) to provide four states of brightness.

公开(公告)号：EP2433172A2

公开(公告)日：2012-03-28

申请号：EP10778507.3

申请日：2010-05-21

Applicant: RealD Inc.

Inventor： SHARP, Gary, D.

IPC: G02B27/28 ,  G02B26/00 ,  G02B27/18

CPC classification number: G03B35/26 ,  G02B26/00 ,  G02B27/26 ,  G02B27/286 ,  H04N13/341 ,  H04N13/363

Abstract: A polarization switch provides substantially ideal binary polarization switching over a broad range of wavelengths using a polarization modulation wheel having at least one retarder stack that transforms polarization. Using the polarization modulation wheel in a polarization system provides a high throughput polarization switch and operates over a wide range of incidence angles while providing substantially continuous and smooth polarization output for each component for any selected polarization basis set. The polarization modulation wheel is well-suited for stereoscopic polarized projection applications.