中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

143 records (took 0.029 seconds)

    Compensated color management systems and methods
    51.
    发明授权
    Compensated color management systems and methods 有权
    补偿色彩管理系统和方法

    公开(公告)号：US06961179B2

    公开(公告)日：2005-11-01

    申请号：US10294426

    申请日：2002-11-14

    Applicant: Jianmin Chen ,  Michael G. Robinson ,  Gary D. Sharp ,  Jonathan R. Birge

    Inventor： Jianmin Chen ,  Michael G. Robinson ,  Gary D. Sharp ,  Jonathan R. Birge

    IPC: G02B5/30 ,  G02B27/28 ,  G02F1/13 ,  G03B21/14 ,  H04N9/31 ,  G02B27/10

    CPC classification number: H04N9/3105 ,  G02B27/283 ,  G02B27/288

    Abstract: Disclosed are color management architectures used in video projection systems including, for example, retarder stacks sensitive to the symmetries between input and output polarizer configurations that provide the polarization transformations that will comprise for skew rays, such that normal incidence performance is maintained for all incident light. Additionally, also disclosed are systems that utilize color selective polarization (CSP) filters and polarizing beam splitting elements such that an output analyzer is not required. One exemplary CSP architecture includes two CSPs, a single polarizing beam splitting element combination for splitting and combining light between two of the three panels, and an output polarizing beam splitting element used as an analyzer such that a single CSP is in the projection path. In all such architectures, an output CSP and clean up polarizer directly in line with the projection optics need not be included, thereby increasing transmission, improving imaging crispness, and reducing cost.

    Abstract translation: 公开了用于视频投影系统中的颜色管理架构，包括例如对输入和输出偏振器配置之间的对称性敏感的延迟器堆叠，其提供将包括用于偏斜光线的偏振变换，从而保持所有入射光的法向入射性能 。 此外，还公开了利用彩色选择偏振（CSP）滤光器和偏振光束分离元件的系统，使得不需要输出分析器。 一个示例性CSP架构包括两个CSP，用于在三个面板中的两个之间分离和组合光的单个偏振分束元件组合，以及用作分析器的输出偏振分束元件，使得单个CSP处于投影路径中。 在所有这样的结构中，不需要包括直接与投影光学器件一致的输出CSP和清除偏振器，从而增加透射率，改善成像脆度并降低成本。

    Color imaging systems and methods
    53.
    发明授权
    Color imaging systems and methods 有权

    公开(公告)号：US06183091B2

    公开(公告)日：2001-02-06

    申请号：US09311587

    申请日：1999-05-14

    Applicant: Kristina M. Johnson ,  Gary D. Sharp

    Inventor： Kristina M. Johnson ,  Gary D. Sharp

    IPC: G03B2114

    CPC classification number: H04N9/3105 ,  G02B27/283 ,  G03B21/2073 ,  G03B33/12 ,  H04N9/3167

    Abstract: A system for separating light into different spectrums and for recombining the light includes at least one polarizing beamsplitter and at least one retarder stack configured to condition the polarization of input light differently for different spectrums. A device embodying the invention could utilize multiple polarizing beamsplitters and multiple retarder stacks. Alternatively, a system could utilize a single polarizing beamsplitter and a single retarder stack in combination with one or more dichroic beamsplitters. In preferred embodiments, one or more reflective modulator panels are included to separately modulate each separated spectrum of light. Such an embodiment can be used for a color projection system. In each of the embodiments that utilize modulators, distances between the modulators and the focusing optics is essentially the same.

    Switchable achromatic polarization rotator
    54.
    发明授权
    Switchable achromatic polarization rotator 有权
    可切换消色差极化旋转器

    公开(公告)号：US6141071A

    公开(公告)日：2000-10-31

    申请号：US245863

    申请日：1999-02-08

    Applicant: Gary D. Sharp

    Inventor： Gary D. Sharp

    IPC: G02F1/13 ,  G02F1/01 ,  G02F1/13363 ,  G02F1/1347 ,  G02F1/141 ,  G02F1/1335

    CPC classification number: G02F1/13363 ,  G02F1/0136 ,  G02F1/13471 ,  G02F1/141 ,  G02F2001/133638 ,  G02F2203/04 ,  G02F2203/07 ,  G02F2203/62 ,  G02F2413/02 ,  G02F2413/08

    Abstract: This invention provides a liquid crystal achromatic rotator switch, and an achromatic shutter using the rotator switch. The rotator switch requires input light of a fixed orientation and switches between rotating the polarization by zero degrees and by a fixed angle, .beta.. The achromatic shutter uses an achromatic 90-degree rotator switch positioned between a pair of polarizers. A first embodiment of the rotator switch comprises one rotatable liquid crystal half-wave retarder in series with one passive half-wave retarder. The liquid crystal retarder has fixed retardance and is driven between two orientations for off- and on-states. A second embodiment of the rotator switch utilizes two variable birefringence liquid crystal cells. The variable birefringence cells having fixed orientation and variable retardance. In the off-state both retarders have zero retardance and in the on-state they have half-wave retardance.

    Abstract translation: 本发明提供了一种液晶消色差旋转开关，以及使用旋转开关的消色差快门。 旋转开关需要固定方向的输入光，并将极化旋转零度和固定角度β之间切换。 消色差快门使用位于一对偏振器之间的消色差90度旋转开关。 旋转开关的第一实施例包括与一个被动半波延迟器串联的一个可旋转的液晶半波延迟器。 液晶延迟器具有固定的延迟，并且在两个取向之间被驱动以用于断开和通态。 旋转开关的第二实施例使用两个可变双折射液晶单元。 可变双折射单元具有固定取向和可变延迟。 在截止状态下，两个延迟器都具有零延迟，并且在导通状态下，它们具有半波延迟。

    Spatially switched achromatic compound retarder
    55.
    发明授权
    Spatially switched achromatic compound retarder 有权
    空间切换消色差复合缓凝剂

    公开(公告)号：US6078374A

    公开(公告)日：2000-06-20

    申请号：US215208

    申请日：1998-12-18

    Applicant: Gary D. Sharp ,  Kristina M. Johnson

    Inventor： Gary D. Sharp ,  Kristina M. Johnson

    IPC: C09K19/52 ,  G02F1/1335

    CPC classification number: C09K19/52 ,  G02F1/1335

    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 liquid crystal retarders. The achromatic compound retarder of this invention comprises a central liquid crystal retarder unit and two outer retarders positioned in series with and on either side of the liquid crystal retarder unit. The liquid crystal retarder unit comprises either (1) a rotatable smectic liquid crystal half-wave retarder or (2) first and second liquid crystal variable retarders having retardance switchable between zero and half-wave. The outer retarders have substantially the same retardance and orientation. Design equations determine the retardance of the outer retarders and their orientation relative to the central retarder to obtain a particular achromatic retardance for the compound structure.

    Abstract translation: 本发明提供了使用液晶复合阻滞剂的消色差化合物延迟剂，消色差极化开关和消色差百叶窗。 进一步提供消色差可延迟近晶型液晶延迟器。 本发明的消色差复合缓凝剂包括中央液晶延迟器单元和两个位于液晶延迟器单元两端串联连接的外缓速器。 液晶延迟器单元包括（1）可旋转的近晶液晶半波延迟器或（2）可在0和1/2波之间切换的第一和第二液晶可变延迟器。 外延迟器具有基本相同的延迟和取向。 设计方程式确定了外部缓凝剂的延迟性及其相对于中心缓凝剂的取向，以获得化合物结构的特定的消色差延迟。

    Chiral smectic liquid crystal polarization interference filters
    58.
    发明授权
    Chiral smectic liquid crystal polarization interference filters 失效
    手性近晶液晶偏振干涉滤光片

    公开(公告)号：US5243455A

    公开(公告)日：1993-09-07

    申请号：US884644

    申请日：1992-05-15

    Applicant: Kristina M. Johnson ,  Gary D. Sharp

    Inventor： Kristina M. Johnson ,  Gary D. Sharp

    IPC: G02F1/1347 ,  G02F1/141 ,  G02F1/21

    CPC classification number: G02F1/141 ,  G02F1/13473 ,  G02F1/216 ,  G02F2203/055

    Abstract: Discretely and continuously tunable single and multiple-stage polarization interference filters employing chiral smectic liquid crystal cells as electronically rotatable retarders are provided. Discretely tunable filters of this invention include those which employ bistable surface-stabilized ferroelectric liquid crystal cells. Continuously tunable filters of this invention include those that employ chiral smectic A ferroelectric liquid crystal cells. Single stage filters include fixed birefringent elements in combination with chiral smectic liquid crystal cells and multiple stage filters can include only chiral smectic liquid crystal cells or can include chiral smectic liquid crystal cells in combination with fixed birefringent elements. Blocking filters useful for color generation and color displays are also provided. The FLC filters provided can be temporally multiplexed.

    Abstract translation: 提供了使用手性近晶液晶单元作为电子可逆延迟器的离散且连续可调的单级和多级偏振干涉滤光片。 本发明的离散可调滤波器包括采用双稳态表面稳定铁电液晶单元的滤波器。 本发明的连续可调滤波器包括采用手性近晶A铁电液晶单元的滤波器。 单级过滤器包括与手性近晶液晶单元组合的固定双折射元件，并且多级过滤器可以仅包括手性近晶液晶单元，或者可以包括与固定双折射元件组合的手性近晶液晶单元。 还提供了用于颜色生成和彩色显示的阻挡滤光片。 提供的FLC滤波器可以进行时间复用。

    Color switch for reduced color cross-talk
    59.
    发明授权
    Color switch for reduced color cross-talk 有权

    公开(公告)号：US11249355B2

    公开(公告)日：2022-02-15

    申请号：US16260934

    申请日：2019-01-29

    Applicant: Gary D. Sharp

    Inventor： Gary D. Sharp

    IPC: G02F1/1347 ,  G02B27/28 ,  H04N9/04 ,  G02B5/30 ,  H01L27/146 ,  G02F1/01 ,  G02F1/13363

    Abstract: A liquid-crystal based color switch for use with an image sensor having sub-diffraction-limited (SDL) pixels. The color switch may switch between a first mode where green light is passed (and blue and red light is blocked) and a second mode where blue and red light is passed (and green light is blocked). The color switch may include an achromatic switch (such as a liquid crystal switch) and retarder stack filter that are both sandwiched between a first and a second polarizer. The SDL pixels may be distributed so that green subpixels are never adjacent to other green subpixels in the same row or column, so that red subpixels are always adjacent to green subpixels in the same row or column, and so that blue subpixels are always adjacent to green subpixels in the same row or column.

    Self-compensating liquid crystal retardation switch
    60.
    发明授权
    Self-compensating liquid crystal retardation switch 有权

    公开(公告)号：US10739651B2

    公开(公告)日：2020-08-11

    申请号：US16195618

    申请日：2018-11-19

    Applicant: Gary D. Sharp ,  Anthony D. McGettigan

    Inventor： Gary D. Sharp ,  Anthony D. McGettigan

    IPC: G02F1/1347 ,  G02F1/13363 ,  G02F1/139

    Abstract: Used herein are two or more switchable variable birefringence liquid crystal devices, in combination with a passive retarder, to produce a device that switches between two retardation values. The device preserves the normal-incidence retardation in each of two voltage states over a broad range of incidence angles using a novel self-compensation scheme. According to one embodiment of this design, the retardation in the thickness direction remains zero in both the unenergized and fully energized states.

Patent Agency Ranking