公开(公告)号：US06492065B2

公开(公告)日：2002-12-10

申请号：US09205675

申请日：1998-12-04

申请人： Shintaro Nakagaki ,  Shigeo Shimizu ,  Hirofumi Imaoka

发明人： Shintaro Nakagaki ,  Shigeo Shimizu ,  Hirofumi Imaoka

IPC分类号： G03H102

CPC分类号： G02B5/203 ,  G02B5/32 ,  G02F1/133514 ,  G02F1/133526

摘要： A thickness of each hologram lens for forming a hologram color filter is set so as to be smaller as the wavelength of light to be diffracted by each hologram lens is shorter. A thin plate glass layer is bonded to a surface of the hologram color filter such that it is in a firm contact therewith by adhesive agent and a sum of the thickness of the thin plate glass layer and thickness of the adhesive agent is smaller than the shortest focal length of the focal lengths in glass of a plurality of the hologram lenses. As a result, light diffracted and divided by the hologram color filter is focused on a picture element electrode of a corresponding color properly thereby eliminating deterioration of color reproduction due to mixing of colors. Further, upon production of the hologram color filter from hologram recording material, an influence of a fringe rotation is compensated.

摘要翻译： 每个全息图透镜的衍射光的波长较短，每一个用于形成全息彩色滤光片的全息图透镜的厚度设定得较小。 薄板玻璃层与全息图滤色片的表面结合，使其与粘合剂牢固接触，薄板玻璃层的厚度和粘合剂的厚度之和小于最短的 多个全息透镜的玻璃中焦距的焦距。 结果，由全息彩色滤光片衍射的光被适当地聚焦在相应颜色的像素电极上，从而消除了颜色混合引起的色彩再现的恶化。 此外，当从全息记录材料生产全息彩色滤光片时，补偿了条纹旋转的影响。

公开(公告)号：US6141124A

公开(公告)日：2000-10-31

申请号：US956957

申请日：1997-10-23

申请人： Tetsuji Suzuki ,  Ryusaku Takahashi ,  Shintaro Nakagaki ,  John E. Gunther ,  Ronald T. Smith

发明人： Tetsuji Suzuki ,  Ryusaku Takahashi ,  Shintaro Nakagaki ,  John E. Gunther ,  Ronald T. Smith

IPC分类号： G02B5/20 ,  G02B5/32 ,  G02F1/1335

CPC分类号： G02B5/203 ,  G02B5/201

摘要： A color filter which, in a reflection type color picture projector using a polarized light component as a projection light, improve the utilization factor of light and a color picture display device using the same color filter are provided. The color filter 3 using a transmission type hologram diffracts and spectroscopically separates P polarized light components related to respective primary colors and condenses them to pixel electrodes 13r, 13g, and 13b on the side of an LCD panel 1. A reflection light which is modulated by an optical modulator 16 on the side of the LCD panel 1 and becomes S polarized light component is incident on the color filter 3. The color filter 3 transmits the S polarized light component and uses it as the projection light. Since the color filter 3 can diffract a P polarized light component at diffraction efficiency of about 100% while restricting the diffraction efficiency of S polarized light component to about 3%, which is substantially advantageous compared with diffraction of S polarized light component, the utilization factor of light can be improved

摘要翻译： 提供了使用偏振光分量作为投影光的反射型彩色图像投影仪提高光的利用率的彩色滤光器和使用相同滤色器的彩色图像显示装置。 使用透射型全息图的滤色器3衍射并分光分离与各原色相关的P偏振光分量，并将其冷凝到LCD面板1侧的像素电极13r，13g和13b。由... 在LCD面板1一侧并变成S偏振光分量的光调制器16入射到滤色器3上。滤色器3透射S偏振光分量并将其用作投影光。 由于滤色器3可以以约100％的衍射效率衍射P偏振光分量，同时将S偏振光分量的衍射效率限制为约3％，这与S偏振光分量的衍射相比是有利的，因此利用因子 的光线可以改善

公开(公告)号：US5999282A

公开(公告)日：1999-12-07

申请号：US744917

申请日：1996-11-07

申请人： Tetsuji Suzuki ,  Shintaro Nakagaki

发明人： Tetsuji Suzuki ,  Shintaro Nakagaki

IPC分类号： G02B5/20 ,  G02B27/28 ,  G02F1/13357 ,  G02B5/32 ,  G02F1/1335

CPC分类号： G02F1/133621 ,  G02B27/283 ,  G02B5/203 ,  G02F1/13362

摘要： An improved color filter and a color image display apparatus employs the filter, the color filter has a hologram device for spectrally diffracting an incident light into plural light beams of different wavelength regions and selectively converging the plural light beams on respective plural picture element electrodes corresponding to the different wavelength regions. The hologram device has such characteristics that S-polarized components of the incident light are diffracted at a maximum diffraction efficiency at a predetermined incident angle of the incident light, and P-polarized components of the incident light are diffracted as such that a difference between the maximum diffraction efficiency of the S-polarized components and the diffraction efficiency of the P-polarized components is not less than 30%, and the diffracted S-polarized components are formed as the plural light beams to be converged on the plural picture element electrodes corresponding to the different wavelength regions.

摘要翻译： 改进的滤色器和彩色图像显示装置采用滤色器，滤色器具有全息装置，用于将入射光谱衍射成不同波长区域的多个光束，并且将多个光束选择性地会聚在相应的多个像素电极上 不同的波长区域。 全息装置具有以入射光的预定入射角以最大衍射效率衍射入射光的S偏振成分，入射光的P偏振分量衍射的特性， S极化分量的最大衍射效率和P偏振分量的衍射效率不小于30％，衍射S偏振分量形成为多个光束会聚在多个像素电极上 到不同的波长区域。

公开(公告)号：US4612570A

公开(公告)日：1986-09-16

申请号：US596552

申请日：1984-04-04

申请人： Shintaro Nakagaki ,  Takashi Kuriyama

发明人： Shintaro Nakagaki ,  Takashi Kuriyama

IPC分类号： H04N9/077 ,  H04N9/64

CPC分类号： H04N9/646 ,  H04N9/077

摘要： A noise reduction circuit is designed to eliminate noise in a color signal of a color video signal without introducing distortion in the waveform of the color signal. The noise reduction circuit is especially designed to eliminate the noise included in a high-frequency component of the color signal. A first circuit passes as an output thereof a signal obtained from the high-frequency component during a time period which is in accordance with a point in a luminance signal of the color video signal where a change in luminance occurs. A second circuit adds the output of the first circuit with the color signal from which the high-frequency component has been eliminated, so as to produce a color signal from which the noise has been substantially eliminated.

摘要翻译： 噪声降低电路被设计为消除彩色视频信号的彩色信号中的噪声，而不引入彩色信号的波形中的失真。 噪声降低电路被特别设计为消除包括在彩色信号的高频分量中的噪声。 第一电路作为其输出，在与发生亮度变化的彩色视频信号的亮度信号中的点相对应的时间段期间，将从高频分量获得的信号作为其输出。 第二电路将第一电路的输出与消除了高频分量的颜色信号相加，以产生基本上消除了噪声的颜色信号。