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    Wide-angle projection lens for projection display systems
    1.
    发明授权
    Wide-angle projection lens for projection display systems 有权
    用于投影显示系统的广角投影镜头

    公开(公告)号：US08587873B2

    公开(公告)日：2013-11-19

    申请号：US13810744

    申请日：2011-07-29

    申请人： Zhisheng Yun ,  Stephen J. Willett ,  Ernesto M. Rodriguez, Jr.

    发明人： Zhisheng Yun ,  Stephen J. Willett ,  Ernesto M. Rodriguez, Jr.

    IPC分类号： G02B13/04

    CPC分类号： G02B9/34 ,  G02B13/06 ,  G02B13/16

    摘要： Wide-angle projection lens, as well as optical engines and projection display devices comprising such projections lens are described. In one embodiment, a wide-angle projection lens is described comprising in sequential order from a screen side a first lens group of negative refractive power, a second lens group of positive refractive power, a third lens group of positive refractive power; and a fourth lens group of positive refractive power. At least one lens group has an aspheric surface. The ratio of the focal length of the wide-angle projection lens (F) to the focal length of each of the lens groups (F1, F2, F3, and F4) is such that |F1/F|>1.3, F2/F>2, 1

    摘要翻译： 广角投影透镜以及包括这种投影透镜的光学引擎和投影显示装置被描述。 在一个实施例中，广角投影透镜被描述为从屏幕侧依次顺序包括负屈光力的第一透镜组，正屈光力的第二透镜组，正折光力的第三透镜组; 以及具有正屈光力的第四透镜组。 至少一个透镜组具有非球面。 广角投影透镜（F）的焦距与每个透镜组（F1，F2，F3和F4）的焦距的比例使得| F1 / F |> 1.3，F2 / F > 2,1

    WIDE-ANGLE PROJECTION LENS FOR PROJECTION DISPLAY SYSTEMS
    2.
    发明申请
    WIDE-ANGLE PROJECTION LENS FOR PROJECTION DISPLAY SYSTEMS 有权
    用于投影显示系统的宽角投影镜头

    公开(公告)号：US20130235464A1

    公开(公告)日：2013-09-12

    申请号：US13810744

    申请日：2011-07-29

    申请人： Zhisheng Yun ,  Stephen J. Willett ,  Ernesto M. Rodriguez, JR.

    发明人： Zhisheng Yun ,  Stephen J. Willett ,  Ernesto M. Rodriguez, JR.

    IPC分类号： G02B9/34

    CPC分类号： G02B9/34 ,  G02B13/06 ,  G02B13/16

    摘要： Wide-angle projection lens, as well as optical engines and projection display devices comprising such projections lens are described. In one embodiment, a wide-angle projection lens is described comprising in sequential order from a screen side a first lens group of negative refractive power, a second lens group of positive refractive power, a third lens group of positive refractive power; and a fourth lens group of positive refractive power. At least one lens group has an aspheric surface. The ratio of the focal length of the wide-angle projection lens (F) to the focal length of each of the lens groups (F1, F2, F3, and F4) is such that |F1/F|>1.3, F2/F>2, 1

    摘要翻译： 广角投影透镜以及包括这种投影透镜的光学引擎和投影显示装置被描述。 在一个实施例中，广角投影透镜被描述为从屏幕侧依次顺序包括负屈光力的第一透镜组，正屈光力的第二透镜组，正折光力的第三透镜组; 以及具有正屈光力的第四透镜组。 至少一个透镜组具有非球面。 广角投影透镜（F）的焦距与每个透镜组（F1，F2，F3和F4）的焦距的比例使得| F1 / F |> 1.3，F2 / F > 2,1

    Projection Lens for Projection Display Systems
    4.
    发明申请
    Projection Lens for Projection Display Systems 有权
    投影显示系统投影镜头

    公开(公告)号：US20130141801A1

    公开(公告)日：2013-06-06

    申请号：US13810894

    申请日：2011-08-09

    申请人： Zhisheng Yun ,  Stephen J. Willett

    发明人： Zhisheng Yun ,  Stephen J. Willett

    IPC分类号： G02B9/12

    CPC分类号： G02B9/12 ,  G02B9/62 ,  G02B13/0035 ,  G02B13/0045 ,  G02B13/04 ,  G02B13/06 ,  G02B13/16 ,  G02B13/18 ,  G03B21/14

    摘要： Projection lens having improved properties such as a high throughput are described. In one embodiment, a projection lens is described comprising in sequential order from a screen side a first lens group, a second lens group of positive refractive power, and a third lens group of positive refractive power. At least one lens group has an aspheric surface. The ratio of the focal length of the projection lens (F) to the focal length of each of the lens groups (F1, F2, and F3) is such that |F1/F|>5, 0.5 5, 0.5

    摘要翻译： 描述了具有诸如高通量的改进性能的投影透镜。 在一个实施例中，描述投影透镜，其从屏幕侧依次顺序包括第一透镜组，正折射光焦度的第二透镜组和正折射光焦度的第三透镜组。 至少一个透镜组具有非球面。 投影透镜（F）的焦距与每个透镜组（F1，F2和F3）的焦距的比率使得| F1 / F |> 5,0.5 <| F2 / F | < 0.9和1 5,0.5 <| F2 / F | < 2.0和1.4

    HIGH DURABILITY COLOR COMBINER
    5.
    发明申请
    HIGH DURABILITY COLOR COMBINER 有权
    高耐用度颜色组合

    公开(公告)号：US20110216396A1

    公开(公告)日：2011-09-08

    申请号：US13129152

    申请日：2009-11-10

    申请人： Andrew J. Ouderkirk ,  Stephen J. Willett ,  Charles L. Bruzzone

    发明人： Andrew J. Ouderkirk ,  Stephen J. Willett ,  Charles L. Bruzzone

    IPC分类号： G02B27/10 ,  G02B27/28

    CPC分类号： G02B27/283 ,  G02B27/141 ,  H04N9/3111 ,  H04N9/3164

    摘要： Optical elements, color combiners using the optical elements, and image projectors using the color combiners are described. The optical elements can be configured as color combiners that receive different wavelength spectrums of light and produce a combined light output that includes the different wavelength spectrums of light. The optical elements include a wavelength selective dichroic mirror that reflects a major portion of actinic light that can damage a reflective polarizer within the optical element. The wavelength selective dichroic mirror transmits a major portion of other wavelengths of light. The resulting color combiners using the optical element may have improved durability compared to a color combiner lacking the wavelength selective dichroic mirror. Image projectors using the color combiners can include reflective (including digital micro-mirror) or polarization (including liquid crystal) imaging modules.

    摘要翻译： 描述使用光学元件的光学元件，组合器以及使用该颜色组合器的图像投影仪。 光学元件可以被配置为接收不同波长光谱的颜色组合器，并产生包括不同波长光谱的组合光输出。 光学元件包括波长选择性二向色镜，其反射可以损坏光学元件内的反射偏振器的光化光的主要部分。 波长选择性分色镜透射其他波长的光的主要部分。 与没有波长选择性分色镜的颜色组合器相比，使用光学元件的所得颜色组合器可以具有改善的耐久性。 使用颜色组合器的图像投影仪可以包括反射（包括数字微镜）或偏振（包括液晶）成像模块。

    Cholesteric polarizer for liquid crystal display and overhead projector
    6.
    发明授权
    Cholesteric polarizer for liquid crystal display and overhead projector 失效
    液晶显示器和高架投影仪的胆甾型偏振器

    公开(公告)号：US5325218A

    公开(公告)日：1994-06-28

    申请号：US999230

    申请日：1992-12-31

    申请人： Stephen J. Willett ,  Gary L. Tritle

    发明人： Stephen J. Willett ,  Gary L. Tritle

    IPC分类号： G02F1/13 ,  G02F1/1335 ,  G02F1/13357 ,  G02F1/1347 ,  G02F1/133 ,  G03B21/00

    CPC分类号： G02F1/13473 ,  G02F1/133536 ,  G02F1/133621 ,  G02F2001/133543 ,  G02F2201/343 ,  Y10S353/03 ,  Y10S353/05

    摘要： A liquid crystal display (LCD) panel employs a cholesteric polarizer which passes light of a first circular polarization, but reflects light of a second circular polarization. The LCD panel may be monochrome or color; in the color embodiments, several different color filters are used, each having one or more cholesteric polarizers tuned to a specific bandwidth in the visible spectrum. These polarizers replace dyed (neutral or dichroic) polarizers of prior art LCD panels, and provide improved color purity. The invention may be enhanced by providing a light recycling scheme whereby the handedness of the circularly polarized light reflected by the polarizers is changed and redirected back to the polarizers. This recycling scheme may also be adapted to provide an overhead projector having a high output polarized light source, particularly useful in conjunction with an LCD panel.

    摘要翻译： 液晶显示器（LCD）面板采用通过第一圆偏振光，但反射第二圆偏振光的胆甾型偏振器。 LCD面板可能是单色或彩色; 在颜色实施例中，使用几种不同的滤色器，每种滤色器具有调谐到可见光谱中的特定带宽的一个或多个胆甾型偏振器。 这些偏振器代替现有技术的LCD面板的染色（中性色或二向色）偏振片，并提供改善的色纯度。 本发明可以通过提供一种光循环方案来增强，由此偏振器反射的圆偏振光的旋转性被改变并被重定向回到偏振器。 该回收方案还可以适于提供具有高输出偏振光源的高架投影仪，其特别适用于LCD面板。

    PROJECTION AND DISPLAY SYSTEM
    8.
    发明申请
    PROJECTION AND DISPLAY SYSTEM 审中-公开
    投影和显示系统

    公开(公告)号：US20120188519A1

    公开(公告)日：2012-07-26

    申请号：US13392635

    申请日：2010-08-30

    申请人： Stephen J. Willett ,  Martin B. Wolk ,  Terry L. Smith ,  Roy A. Auerbach ,  Michael A. Haase ,  Steven G. Saxe ,  Tommie W. Kelley

    发明人： Stephen J. Willett ,  Martin B. Wolk ,  Terry L. Smith ,  Roy A. Auerbach ,  Michael A. Haase ,  Steven G. Saxe ,  Tommie W. Kelley

    IPC分类号： G03B21/14

    CPC分类号： G03B21/204 ,  H04N9/3129 ,  H04N9/3138

    摘要： A projection system and a display that incorporates the projection system are provided. The projection system includes at least one electroluminescent device that emits a first wavelength of light, at least one semiconductor multilayer stack that downconverts the first wavelength of light to a second wavelength of light, and a scanning optical element that transmits the light along a scanned direction. The electroluminescent device can be part of an array of electroluminescent devices, and can be monolithic. The semiconductor multilayer stack can be part of an array of semiconductor multilayer stacks, and can also be monolithic. The scanning optical element can be positioned to scan the electroluminescent device across the semiconductor multilayer stack, or it can be positioned to scan the downconverted light after it has left the semiconductor multilayer stack.

    摘要翻译： 提供了投影系统和包括投影系统的显示器。 投影系统包括发射第一波长的光的至少一个电致发光器件，将至少一个将第一波长的光变换为第二波长的光的半导体多层叠层，以及沿扫描方向透射光的扫描光学元件 。 电致发光器件可以是电致发光器件的阵列的一部分，并且可以是单片的。 半导体多层堆叠可以是半导体多层堆叠的阵列的一部分，并且也可以是整体的。 扫描光学元件可以定位成跨越半导体多层堆叠扫描电致发光器件，或者可以将扫描光学元件定位成在其离开半导体多层堆叠之后扫描下变换的光。