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1. 发明授权

US07072003B2 Color video projection system employing reflective liquid crystal display devices 有权
公开(公告)号：US07072003B2
公开(公告)日：2006-07-04
申请号：US10696297
申请日：2003-10-28
申请人： Kurt Stahl , Jeffrey A. Gohman
发明人： Kurt Stahl , Jeffrey A. Gohman
IPC分类号： G02F1/1335
CPC分类号： H04N9/3105 , G03B21/005 , G03B21/2073 , H04N9/3167
摘要： An image projector (8, 68) includes a light source (14) that illuminates a three-path reflective LCD assembly (25, 74) that produces images for projection by a projection lens (27). The light source produces S-polarized light rays that are received by a spectrally selective wave plate (36) that changes a first wavelength range of light to P-polarized light rays (34) and transmits without polarization change second and third wavelength ranges of light. A plate-type transflective polarizing beam splitter (40) transmits the P-polarized first wavelength range light rays and reflects S-polarized second and third wavelength range light rays (34). The P-polarized first wavelength range light rays transmit through a field lens (421) and impinge on a first reflective LCD light valve (261). The S-polarized second and third wavelength range light rays strike a pleochroic filter (48), which divides them into second and third wavelength range light rays (44, 46) that propagate through field lenses (422, 423) and impinge on respective second and third LCD light valves (262, 263). The light rays impinging on dark state pixels on the first LCD light valve are reflected without polarization direction change and return toward the light source along their original paths. However, the light rays impinging on illuminated state pixels on the first LCD light valve are reflected with a 90° change in polarization direction and are reflected toward the projection lens by the transflective polarizing beam splitter. The light rays impinging on illuminated state pixels on the second and third LCD light valves are reflected with a 90° change in polarization direction, are recombined by the pleochroic filter, and transmit through the transflective polarizing beam splitter toward the projection lens.

2. 发明授权

US06661475B1 Color video projection system employing reflective liquid crystal display device 有权
标题翻译：彩色视频投影系统采用反射式液晶显示装置
公开(公告)号：US06661475B1
公开(公告)日：2003-12-09
申请号：US09535427
申请日：2000-03-23
申请人： Kurt Stahl , Jeffrey A. Gohman
发明人： Kurt Stahl , Jeffrey A. Gohman
IPC分类号： G02F11335
CPC分类号： H04N9/3105 , G03B21/005 , G03B21/2073 , H04N9/3167
摘要： An image projector (8, 68) includes a light source (14) that illuminates a three-path reflective LCD assembly (25, 74) that produces images for projection by a projection lens (27). The light source produces S-polarized light rays that are received by a spectrally selective wave plate (36) that changes a first wavelength range of light to P-polarized light rays (34) and transmits without polarization change second and third wavelength ranges of light. A plate-type transflective polarizing beam splitter (40) transmits the P-polarized first wavelength range light rays and reflects S-polarized second and third wavelength range light rays (34). The P-polarized first wavelength range light rays transmit through a field lens (421) and impinge on a first reflective LCD light valve (261). The S-polarized second and third wavelength range light rays strike a pleochroic filter (48), which divides them into second and third wavelength range light rays (44, 46) that propagate through field lenses (422, 423) and impinge on respective second and third LCD light valves (262, 263). The light rays impinging on dark state pixels on the first LCD light valve are reflected without polarization direction change and return toward the light source along their original paths. However, the light rays impinging on illuminated state pixels on the first LCD light valve are reflected with a 90° change in polarization direction and are reflected toward the projection lens by the transflective polarizing beam splitter. The light rays impinging on illuminated state pixels on the second and third LCD light valves are reflected with a 90° change in polarization direction, are recombined by the pleochroic filter, and transmit through the transflective polarizing beam splitter toward the projection lens.
摘要翻译：图像投影仪（8,68）包括照亮三路反射LCD组件（25,74）的光源（14），其产生用于由投影透镜（27）投影的图像。光源产生由频谱选择波片（36）接收的S偏振光，其将第一波长范围的光改变为P偏振光（34），并且在没有偏振的情况下透射光的第二和第三波长范围的光。板式半透射偏振光束分离器（40）透射P偏振的第一波长范围的光线并反射S偏振的第二和第三波长范围的光线（34）。 P偏振的第一波长范围的光线通过场透镜（421）透射并撞击在第一反射型LCD光阀（261）上。 S偏振的第二和第三波长范围的光线撞击多色滤光器（48），其将它们分成通过场透镜（422,423）传播的第二和第三波长范围的光线（44,46）并且撞击在相应的第二和第三液晶光阀（262,263）。入射到第一LCD光阀上的暗态像素的光线在没有偏振方向变化的情况下被反射，并沿其原始路径朝向光源返回。然而，照射在第一LCD光阀上的照明状态像素上的光线以偏振方向的90°变化反射，并且通过半透射偏振分束器向投影透镜反射。入射到第二和第三LCD光阀上的照明状态像素上的光线以偏振方向的90°变化反射，被双色滤光片重新组合，并透过半透射偏振分束器朝投影透镜透射。

3. 发明授权

US07375772B2 Color video projection system employing reflective liquid crystal display devices 有权
标题翻译：彩色视频投影系统采用反射式液晶显示装置
公开(公告)号：US07375772B2
公开(公告)日：2008-05-20
申请号：US11397913
申请日：2006-04-03
申请人： Kurt Stahl , Jeffrey A. Gohman
发明人： Kurt Stahl , Jeffrey A. Gohman
IPC分类号： G02F1/1335 , G03B21/28
CPC分类号： H04N9/3105 , G03B21/005 , G03B21/2073 , H04N9/3167
摘要： A system including a light source, a polarizing beam splitter, and first, second and third light valves is provided. The light source produces light in first, second and third wavebands in a second polarization direction. The beam splitter transmits the first waveband of light in a first polarization direction and the second and third wavebands of light in the second polarization direction. The first, second and third light valves reflect at least a portion of the respective first, second and third wavelength bands of light generally toward a projection lens.
摘要翻译：提供一种包括光源，偏振光束分离器以及第一，第二和第三光阀的系统。光源在第一，第二和第三波段中在第二偏振方向产生光。分束器在第一偏振方向上发射第一波段光，并且在第二偏振方向上发射第二和第三波带。第一，第二和第三光阀将各个第一，第二和第三波长带的至少一部分通常朝向投影透镜反射。

4. 发明授权

US07347559B2 Color video projection system employing reflective liquid crystal display devices 有权
标题翻译：彩色视频投影系统采用反射式液晶显示装置
公开(公告)号：US07347559B2
公开(公告)日：2008-03-25
申请号：US11469014
申请日：2006-08-31
申请人： Kurt Stahl , Jeffrey A. Gohman
发明人： Kurt Stahl , Jeffrey A. Gohman
IPC分类号： G03B21/00 , G03B21/26 , G03B21/28 , G02F1/1335
CPC分类号： H04N9/3105 , G03B21/005 , G03B21/2073 , H04N9/3167
摘要： Methods and apparatuses for use in image projecting are provided. One apparatus includes a transflective polarizing beam splitter, a plurality of reflective liquid crystal light valves, and a spectrally selective output device. The beam splitter is capable of receiving the wavelength bands of light and transmitting at least one wavelength band of light having a first polarization direction, and reflecting other wavelength bands of light having a second polarization direction. The light valves are capable of selectively reflecting at least portions of respective wavelength bands of lights. The spectrally selective output device is capable of receiving at least one of the portions of the wavelength band of light and changing the polarization of the portion of the first wavelength of light.
摘要翻译：提供了用于图像投影的方法和装置。一种装置包括半透射偏振分束器，多个反射型液晶光阀和光谱选择性输出装置。分束器能够接收光的波长带并透射具有第一偏振方向的光的至少一个波长带，并且反射具有第二偏振方向的光的其它波长带。光阀能够选择性地反射各个波段的光的至少一部分。光谱选择性输出装置能够接收光波长带的部分中的至少一个并改变第一波长光的部分的偏振。

5. 发明授权

US07768715B2 Whole system zoom and varifocal lens with intermediate image 有权
标题翻译：全系统变焦和变焦镜头与中间图像
公开(公告)号：US07768715B2
公开(公告)日：2010-08-03
申请号：US12035381
申请日：2008-02-21
申请人： Jeffrey A. Gohman , Mark D. Peterson
发明人： Jeffrey A. Gohman , Mark D. Peterson
IPC分类号： G02B15/14 , G02B9/34 , G02B9/12 , G02B23/14
CPC分类号： G02B7/102 , G02B15/177
摘要： A lens system for forming a final image of an object, said system having an object side and an image side and forming a first intermediate real image between the object and final image, said system comprising a moving lens group containing the intermediate real image as the magnification of the final image is changed. The lens system is configured as a whole system so that optical aberrations at the intermediate real image, including field curvature, focus, astigmatism, distortion and color separation, are allowed to be of substantially greater magnitude than the corresponding optical aberrations of the final image.
摘要翻译：一种用于形成物体的最终图像的透镜系统，所述系统具有物体侧和图像侧，并且在物体和最终图像之间形成第一中间真实图像，所述系统包括：运动透镜组，其包含中间实像，改变最终图像的放大倍数。透镜系统被配置为整个系统，使得包括场曲率，焦点，像散，失真和颜色分离在内的中间实像的光学像差被允许比最终图像的对应光学像差大得多的幅度。

6. 发明授权

US6137638A Projection zoom lens system and projector apparatus 失效
标题翻译：投影变焦镜头系统和投影仪
公开(公告)号：US6137638A
公开(公告)日：2000-10-24
申请号：US363239
申请日：1999-07-28
申请人： Akira Yamagishi , Jeffrey A. Gohman
发明人： Akira Yamagishi , Jeffrey A. Gohman
IPC分类号： G02B15/00 , G02B13/24 , G02B15/177 , G02B15/14 , G02B3/00 , G02B9/60
CPC分类号： G02B13/22 , G02B13/04
摘要： A projection zoom lens system of the present invention having telecentric incident side is suitable for a projector apparatus using LCD or DMD with prism. The projection zoom lens system of this invention comprises five lens groups having, from the screen side, negative, positive, positive, negative and positive power. In addition to this arrangement, since the lens located closest to the screen is a screen side convex negative meniscus lens, wide-angled and bright zoom lens system can be realized. Further, by designing the distribution of power of the first lens group located closest to the screen, the projection zoom lens provides further improved aberration correction. As the condition for realizing the aforementioned projection zoom lens system, it is preferable that a focal length f1 of the first lens group and a focal length at a wide-angle end fw satisfy the following condition:-1.9
摘要翻译：具有远心入射侧的本发明的投影变焦透镜系统适用于使用具有棱镜的LCD或DMD的投影仪装置。本发明的投影变焦透镜系统包括从屏幕侧具有负，正，正，负和正功率的五个透镜组。除了这种布置之外，由于最靠近屏幕的透镜是屏幕侧凸起的负弯月形透镜，所以可以实现广角和亮度的变焦透镜系统。此外，通过设计位于最靠近屏幕的第一透镜组的功率分布，投影变焦透镜提供进一步改进的像差校正。作为实现上述投影变焦透镜系统的条件，优选第一透镜组的焦距f1和广角端fw的焦距满足以下条件：-1.9

7. 发明申请

US20080198451A1 WHOLE SYSTEM ZOOM AND VARIFOCAL LENS WITH INTERMEDIATE IMAGE 有权
标题翻译：具有中间图像的全系统变焦和变焦镜头
公开(公告)号：US20080198451A1
公开(公告)日：2008-08-21
申请号：US12035381
申请日：2008-02-21
申请人： Jeffrey A. Gohman , Mark D. Peterson
发明人： Jeffrey A. Gohman , Mark D. Peterson
IPC分类号： G02B15/16
CPC分类号： G02B7/102 , G02B15/177
摘要： A lens system for forming a final image of an object, said system having an object side and an image side and forming a first intermediate real image between the object and final image, said system comprising a moving lens group containing the intermediate real image as the magnification of the final image is changed. The lens system is configured as a whole system so that optical aberrations at the intermediate real image, including field curvature, focus, astigmatism, distortion and color separation, are allowed to be of substantially greater magnitude than the corresponding optical aberrations of the final image.
摘要翻译：一种用于形成物体的最终图像的透镜系统，所述系统具有物体侧和图像侧，并且在物体和最终图像之间形成第一中间真实图像，所述系统包括：运动透镜组，其包含中间实像，改变最终图像的放大倍数。透镜系统被配置为整个系统，使得包括场曲率，焦点，像散，失真和颜色分离在内的中间实像的光学像差被允许比最终图像的对应光学像差大得多的幅度。

8. 发明授权

US06471356B1 Portable image projection system having reduced weight and profile 有权
标题翻译：便携式图像投影系统具有减轻的重量和轮廓
公开(公告)号：US06471356B1
公开(公告)日：2002-10-29
申请号：US09637180
申请日：2000-08-11
申请人： Jeffrey A. Gohman , Mark Peterson
发明人： Jeffrey A. Gohman , Mark Peterson
IPC分类号： G03B2100
CPC分类号： H04N9/3141 , G02B26/0833 , H04N5/7458 , H04N9/3114
摘要： An image projector employs a prism assembly that receives incident light, illuminates a reflective light modulator, and receives therefrom reflected imaging light for direction toward a small-diameter light entry pupil of a light-weight, compact projection lens. The prism assembly includes compensating and output prism components having opposed surfaces separated by an air gap. The prism assembly sets up a correct illumination angle on the DMD and then separates the incident illumination light from the reflected imaging light. Each on-state micromechanical DMD mirror reflects the illumination light nearly normal to a horizontal datum plane, forming reflected imaging light that reflects off the air gap and reenters the prism assembly through the output prism component. A focusing lens disposed between the prism assembly and the DMD refracts the reflected imaging light into a converging imaging light bundle compatible with the small diameter light entry pupil of the projection lens.
摘要翻译：图像投影仪采用接收入射光的棱镜组件，照射反射光调制器，并且从其反射的成像光接收朝向小重量紧凑的投影透镜的小直径光入射光瞳的方向。棱镜组件包括补偿和输出具有由气隙分开的相对表面的棱镜部件。棱镜组件在DMD上建立正确的照明角度，然后将入射的照明光与反射的成像光分离。每个开状态的微机械DMD镜将照明光反射到几乎垂直于水平基准平面，形成反射出的空气间隙的反射成像光，并通过输出棱镜部件重新输入棱镜组件。设置在棱镜组件和DMD之间的聚焦透镜将反射的成像光折射成与投影透镜的小直径光入射光瞳相容的会聚成像光束。

9. 发明授权

US6053615A Image projector with polarization conversion system 失效
标题翻译：具有偏光转换系统的图像投影仪
公开(公告)号：US6053615A
公开(公告)日：2000-04-25
申请号：US904393
申请日：1997-08-01
申请人： Mark D. Peterson , Jeffrey A. Gohman
发明人： Mark D. Peterson , Jeffrey A. Gohman
IPC分类号： G02B27/28 , G03B21/14
CPC分类号： G02B27/283
摘要： An image projector has an optical path including, from upstream to downstream, a light source, a light pipe, a polarization conversion prism, a positive lens group and a light valve. The light pipe has an outlet and an inlet, and is constructed to receive light from the light source and to produce a unique projection display format as light is transmitted therethrough. The polarization conversion prism recycles light to optimize the amount of light that is properly polarized in the system. The positive lens group includes at least one positive lens positioned downstream of the polarization conversion prism. The positive lens group images the outlet of the light pipe onto the light valve.
摘要翻译：图像投影仪具有从光源，光管，偏振转换棱镜，正透镜组和光阀的上游到下游的光路。光管具有出口和入口，并且被构造成从光源接收光，并且当光透射通过其时产生独特的投影显示格式。偏振转换棱镜再循环光以优化系统中适当极化的光量。正透镜组包括位于偏振转换棱镜下游的至少一个正透镜。正透镜组将光管的出口图像到光阀上。

10. 发明授权

US07413312B2 Projection device and screen 有权
标题翻译：投影设备和屏幕
公开(公告)号：US07413312B2
公开(公告)日：2008-08-19
申请号：US11463572
申请日：2006-08-09
申请人： T. Scott Engle , Jeffrey A. Gohman
发明人： T. Scott Engle , Jeffrey A. Gohman
IPC分类号： G03B21/14 , H04N5/64
CPC分类号： G03B21/10 , G02B27/0025 , G03B21/145 , G03B21/58 , G03B37/00 , H04N9/3141
摘要： A projection system. The projection system includes a projector, a projector holder, and, optionally, a screen. When included, the screen has at least a deployed configuration in which a viewing portion of the screen is substantially planar. The projector includes a wide-angle lens system to selectively project display images onto the projection screen or other viewing surface. The projector holder supports the projector and is moveable relative to the projection screen or other viewing surface. The projector holder has at least an operating position at which the projector is supported for projection onto the projection screen or other viewing surface.
摘要翻译：投影系统。投影系统包括投影仪，投影仪保持器和可选的屏幕。当包括时，屏幕至少具有展开配置，其中屏幕的观看部分基本上是平面的。投影仪包括广角镜头系统，用于选择性地将显示图像投影到投影屏幕或其他观察表面上。投影仪支架支撑投影机，并可相对于投影屏幕或其他观察表面移动。投影仪保持器具有至少一个操作位置，在该操作位置投影机被支撑以投影到投影屏幕或其他观察表面上。

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