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1. 发明申请

WO2013017409A1 DISPOSITIF POUR LA POLARISATION D'UNE SEQUENCE VIDEO A VISIONNER EN STEREOSCOPIE 审中-公开
标题翻译：用于将视频序列偏置于立体视觉的设备
公开(公告)号：WO2013017409A1
公开(公告)日：2013-02-07
申请号：PCT/EP2012/064069
申请日：2012-07-18
申请人： VOLFONI R&D , PALMER, Stephen
发明人： PALMER, Stephen
IPC分类号： G02B27/22 , G02B27/26 , G02B27/28 , H04N9/31
CPC分类号： G02B27/26 , G02B27/2264 , G02B27/283 , G03B35/26 , H04N13/337 , H04N13/341 , H04N13/363
摘要： L'invention concerne un dispositif pour la polarisation d'une séquence vidéo à visionner en stéréoscopie, comprenant: - un séparateur de faisceaux destiné à séparer un faisceau incident en des premier et deuxième faisceaux présentant respectivement des première et deuxième polarisations perpendiculaires comportant quatre prismes (321, 322, 323, 324); - des première et deuxième cellules (331,332) à rotation de polarisation variable, traversées respectivement par les premier et deuxième faisceaux issus du séparateur de faisceaux; - un circuit de commande (31) définissant la rotation de polarisation desdites première et deuxième cellules de sorte que les premier et deuxième faisceaux ayant traversé respectivement les première et deuxième cellules présentent simultanément une même polarisation, et de sorte que cette même polarisation alterne entre deux états perpendiculaires; - des premier et deuxième miroirs (341,342) réfléchissant respectivement les premier et deuxième faisceaux issus du séparateur de faisceaux.
摘要翻译：本发明涉及用于使视频序列偏振以便立体观看的装置，包括： - 分束器，其被设计成将入射光束分离成具有分别具有第一和第二垂直偏振的第一和第二垂直偏振，所述第一和第二光束包括四个棱镜（321,322 ，323,324）; - 分别由来自分束器的第一和第二光束穿过的第一和第二可变偏振旋转单元（331,332） - 限定所述第一和第二单元的偏振旋转的控制电路（31），使得分别穿过第一和第二单元，第一和第二光束同时具有相同的偏振，并且使得相同的偏振在两个垂直之间交替状态; - 分别反射来自分束器的第一和第二光束的第一和第二反射镜（341,342）。

2. 发明申请

WO2016207724A1 STEREOSCOPIC 3D PROJECTION SYSTEM WITH IMPROVED LEVEL OF OPTICAL LIGHT EFFICIENCY 审中-公开
标题翻译：具有提高光学效率水平的立体三维投影系统
公开(公告)号：WO2016207724A1
公开(公告)日：2016-12-29
申请号：PCT/IB2016/001004
申请日：2016-06-24
申请人： VOLFONI R&D EURL
发明人： PALMER, Stephen
IPC分类号： G02B27/22 , G02B27/26 , H04N13/04 , G02B5/30
CPC分类号： G02B27/26 , G02B5/3041 , G02B5/3083 , G02B27/2264 , G02B27/283 , G02F1/13363 , G03B21/56 , H04N13/337 , H04N13/341 , H04N13/363
摘要： A time-multiplexed stereoscopic 3d projection system including a beam-splitting element to split the randomly polarized image-beam generated by a single-lens projector into one primary image-beam, possessing a first state of linear polarization, and two secondary image-beams, both possessing a second state of linear polarization. The polarization states are mutually orthogonal. The primary and secondary image-beams recombine to form a complete image on the surface of a polarization-preserving projection-screen. There are polarization modulators that modulate the first and second states of linear polarization between a left and right circular polarization state. There is a contrast enhancement film in the optical -path of the primary or secondary image-beams located between the polarization modulator and the projection-screen. The contrast enhancement film comprises a stack of at least three uniaxially stretched retardation-films which perturb the circular polarization state of said image-beams and which possess an in-plane retardation value substantially equal to 140nm, 270nm, or 540nm.
摘要翻译：一种时分复用立体3D投影系统，包括分束元件，将由单透镜投影仪产生的随机偏振图像光束分解为具有第一状态的线性偏振的一个主图像束，以及两个次级图像束都具有第二种线性极化状态。极化状态是相互正交的。初级和次级图像光束重新组合以在偏振保留投影屏幕的表面上形成完整的图像。存在调制左和右圆极化状态之间的线性极化的第一和第二状态的偏振调制器。位于偏振调制器和投影屏之间的主要或次要图像光束的光学路径中存在对比度增强膜。对比度增强膜包括至少三个单轴拉伸延迟膜的堆叠，其扰乱所述图像束的圆偏振状态并且具有基本上等于140nm，270nm或540nm的面内延迟值。

3. 发明申请

WO2019064155A1 ACTIVE 3D SHUTTER-GLASSES OFFERING AN IMPROVED LEVEL OF IMAGE-BRIGHTNESS 审中-公开
公开(公告)号：WO2019064155A1
公开(公告)日：2019-04-04
申请号：PCT/IB2018/057340
申请日：2018-09-21
申请人： VOLFONI R&D
发明人： PALMER, Stephen
IPC分类号： G02B27/22 , G02F1/137 , G02F1/1343
CPC分类号： H04N13/341 , G02B27/2264 , G02B27/26 , G02C7/101 , G02F1/133528 , G02F1/13718 , G02F1/1393 , G02F2001/134381 , H04N13/398
摘要： The present invention discloses the design of active 3d shutter-glasses for the viewing of time-multiplexed stereoscopic three dimensional (3d) images that offer both an improved level of on-screen image-brightness as well as reduced manufacturing costs as compared to other prior-art technologies. The disclosed invention is based on the insight that a tangential in-plane electrical- field can be utilized in order to provide for a voltage-assisted relaxation switching step together with cholesteric liquid crystal materials, thereby increasing the relaxation speed of said cholesteric liquid crystal materials thereof. Furthermore, dichroic-dye materials can additionally be added to said cholesteric liquid crystal materials in order to absorb at least some of the scattered light and hence reduce the overall level of perceived on-screen image-haze.

4. 发明申请

WO2016097858A1 STEREOSCOPIC THREE DIMENSIONAL IMAGING SYSTEM 审中-公开
标题翻译：立体三维成像系统
公开(公告)号：WO2016097858A1
公开(公告)日：2016-06-23
申请号：PCT/IB2015/002478
申请日：2015-12-16
申请人： VOLFONI R&D EURL
发明人： PALMER, Stephen
IPC分类号： H04N13/04
CPC分类号： G02B27/26 , H04N13/337 , H04N13/363
摘要： A 3-d projection system including first and second projectors generates left and right eye image beams. There is a first beam-splitting element to split the left-eye image beam into a primary left-eye image beam and two secondary left-eye image-beams and a second beam-splitting element to split the right-eye image beam into a primary right-eye image beam and two secondary right-eye image beams. The primary and secondary image beams have first and second linear polarization states, respectively. There is a first optical quarter waveplate device configured to receive the primary left-eye image beam and two secondary left-eye image beams and to convert their linear polarization states to a first circular polarization orientation. There is a second optical quarter waveplate device configured to convert the primary right-eye image beam and two secondary right-eye image beams to a second circular polarization orientation. The first and second circular polarization orientations are mutually orthogonal.
摘要翻译：包括第一和第二投影仪的3-d投影系统产生左眼和右眼图像束。存在第一分束元件，用于将左眼图像束分割为主左眼图像束和两个次左眼图像束和第二分束元件，以将右眼图像束分割为主右眼图像束和二次右眼图像束。初级和次级图像光束分别具有第一和第二线性极化状态。存在配置成接收初级左眼图像束和两个次级左眼图像束并将其线性偏振状态转换为第一圆偏振方向的第一光学四分之一波片装置。存在第二光学四分之一波片装置，其被配置为将主要右眼图像束和两个次级右眼图像束转换为第二圆偏振方向。第一和第二圆偏振取向是相互正交的。

5. 发明申请

WO2021144599A1 HIGH BRIGHTNESS STEREOSCOPIC 3D PROJECTION SYSTEM 审中-公开
公开(公告)号：WO2021144599A1
公开(公告)日：2021-07-22
申请号：PCT/IB2020/000046
申请日：2020-01-14
申请人： VOLFONI R&D
发明人： PALMER, Stephen
IPC分类号： H04N13/341 , H04N13/363
摘要： The present invention relates to a time-multiplexed stereoscopic 3d projection system that provides a higher level of on-screen image-brightness and image quality as compared to other prior-art technologies based on a single-beam architecture. The invention is based on the insight that a polarization beam-splitting element can be arranged to split an incident image-beam generated by a projector into one transmitted image-beam and at least one reflected image-beam, wherein each of said transmitted and reflected image-beams possess the same common state of polarization. Furthermore, by utilization of at least one reflecting surface, polarization rotator, polarization modulator, polarization-preserving projection-screen and passive polarized viewing-glasses, a stereoscopic 3d projection system is disclosed that provides for a high level of on-screen image-brightness and image quality.

6. 发明申请

WO2021099841A1 STEREOSCOPIC 3D SYSTEM USING LINEAR POLARIZATION 审中-公开
公开(公告)号：WO2021099841A1
公开(公告)日：2021-05-27
申请号：PCT/IB2020/000977
申请日：2020-11-20
申请人： VOLFONI R&D , SHENZHEN TIMEWAYING TECHNOLOGY CO., LTD
发明人： PALMER, Stephen , CAILLAUD, Bertrand , LI, Yanlang
IPC分类号： G02B27/28 , G02B30/25 , H04N13/337 , H04N13/363
摘要： Stereoscopic 3D systems include a conversion system having a polarization beam-splitting element to separate a randomly polarized incident image-beam into one transmitted image-beam and at least one reflected image-beam, first and second polarization modulators arranged to modulate states of the transmitted and reflected image-beams between first and second output linear polarization states, the modulators including first and second pi-cell liquid crystal elements aligned in mutually crossed orientation and switched between first and second optical-states, one of the optical-states having in-plane optical retardation corresponding to a quarter-wave plate (QWP), an additional QWP proximate to one of the pi-cell liquid crystal elements and perpendicularly aligned to the optical axis for the in-plane optical retardation for one of the pi-cell liquid crystal elements. Passive linear polarized viewing-glasses include first and second lenses, each having a mutually parallel linear polarizer, and a half-wave plate located proximate the input surface for one of the lenses.

7. 发明申请

WO2019043456A1 STEREOSCOPIC THREE DIMENSIONAL PROJECTION SYSTEM USING ELLIPTICAL POLARIZATION 审中-公开
公开(公告)号：WO2019043456A1
公开(公告)日：2019-03-07
申请号：PCT/IB2018/001109
申请日：2018-09-04
申请人： VOLFONI R&D
发明人： PALMER, Stephen
IPC分类号： H04N13/341 , H04N13/363 , H04N13/337
摘要： The present invention discloses a stereoscopic 3d projection system that is based on elliptical polarization, and more specifically a time-multiplexed stereoscopic 3d projection system that enables the viewer to observe stereoscopic 3d images on the surface of a polarization-preserving projection-screen via utilization of passive elliptically-polarized viewing-glasses. The disclosed invention provides a stereoscopic 3d projection system that is capable of operating at higher frame- rates and/or with higher optical light efficiency as compared to other prior-art technologies that are instead based on circular polarization.

8. 发明申请

WO2019073343A1 STEREOSCOPIC THREE DIMENSIONAL PROJECTION SYSTEM WITH SHORT THROW RATIO 审中-公开
公开(公告)号：WO2019073343A1
公开(公告)日：2019-04-18
申请号：PCT/IB2018/057705
申请日：2018-10-03
申请人： VOLFONI R&D
发明人： PALMER, Stephen
IPC分类号： G02B27/22 , G02B27/26 , H04N13/337 , H04N13/341 , H04N9/31
摘要： The present invention relates to a time-multiplexed stereoscopic 3d projection system wherein the image -beam from a digital cinema projector is separated by a polarization beam- splitting element into one primary image-beam possessing a first state of polarization and at least one secondary image-beam possessing a second state of polarization. Polarization modulators are provided in order to modulate the polarization state for each of said primary and secondary image -beams thereof and arranged so that all left-eye images possess a first modulated state of polarization and all right-eye images possess a second modulated state of polarization. Additionally, there is provided one uniaxial condensing lens and at least one uniaxial expanding lens in order to minimize the optical path-lengths for each of said primary and secondary image- beams thereof, hence enabling said stereoscopic 3d projection system according to the present invention to operate together with projectors having a shorter throw -ratio as compared to other prior-art technologies.

9. 发明申请

WO2014080018A1 MODULATEUR DE POLARISATION OPTIQUE A CRISTAUX LIQUIDES 审中-公开
标题翻译：具有液晶的光学极化调制器
公开(公告)号：WO2014080018A1
公开(公告)日：2014-05-30
申请号：PCT/EP2013/074645
申请日：2013-11-25
申请人： VOLFONI R&D
发明人： PALMER, Stephen
IPC分类号： H04N13/04 , G02F1/1343
CPC分类号： G02F1/0136 , G02B27/2264 , G02F2001/134318 , H04N13/337 , H04N13/341 , H04N13/363
摘要： L'invention concerne un modulateur de polarisation optique, comportant une cellule à cristaux liquides configurée pour polariser sélectivement un flux lumineux, incluant : deux substrats transparents en vis-à-vis; une couche de cristaux liquides disposée entre les deux substrats deux électrodes (36), disposées entre les deux substrats, aptes à appliquer un champ électrique aux cristaux liquides pour commuter leur état optique; Au moins une des deux électrodes est conformée de façon à présenter une pluralité de bandes (40) électriquement isolées les unes des autres sur leur longueur, la longueur (L) de chacune desdites bandes étant supérieure à dix fois la largeur (W) de cette bande, chacune desdites bandes étant électriquement connectée par une extrémité (44) aux autres desdites bandes, ladite extrémité étant électriquement connectée à un circuit d'excitation électrique.
摘要翻译：本发明涉及一种光偏振调制器，其包括具有液晶的单元，该液晶被配置为选择性地使光束偏振，包括：两个彼此面对的透明基板; 布置在两个基板之间的液晶层，布置在两个基板之间的两个电极（36），并且能够向液晶施加电场以切换其光学状态。两个电极中的至少一个被成形为具有在其长度上彼此电绝缘的多个条带（40），每个条带的长度（L）大于宽度的十倍（W），所述条中的每一个通过端部（44）电连接到所述其它条带，并且所述端部电连接到电激励电路。

10. 发明申请

WO2002067045A1 A METHOD OF CHANGING THE PHASE OF BISTABLE CHOLESTERIC LIQUID CRYSTALS 审中-公开
标题翻译：改变双稳态液晶相的方法
公开(公告)号：WO2002067045A1
公开(公告)日：2002-08-29
申请号：PCT/SE2002/000257
申请日：2002-02-14
申请人： LC-TEC SWEDEN AB , PALMER, Stephen
发明人： PALMER, Stephen
IPC分类号： G02F1/137
CPC分类号： G02F1/13718 , G09G3/3629 , G09G2300/0486 , G09G2310/0245 , G09G2310/061
摘要： A method of changing the liquid crystal phase of bistable, cholesteric liquid crystals in a display is provided. In the display there is provided at least two active display areas with inactive display areas lying between said active display areas, and a D.C voltage is applied for a predetermined period of time to neighbouring active display areas, thereby causing the liquid crystal phase of the inactive display areas between the active areas to changed to a predetermined state. In such way, mechanical pressure marks in cholesteric liquid crystal displays can be removed. A display adapted for this method is also disclosed.
摘要翻译：提供了一种在显示器中改变双稳态胆甾型液晶的液晶相的方法。在显示器中，提供至少两个活动显示区域，其中不活动显示区域位于所述活动显示区域之间，并且将DC电压施加预定时间段到相邻的活动显示区域，从而导致不活动的液晶相位将活动区域之间的区域显示为预定状态。以这种方式，可以去除胆甾型液晶显示器中的机械压力标记。还公开了适用于该方法的显示器。

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