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1. 发明授权

US06300954B1 Methods and apparatus for detecting liquid crystal display parameters using stokes parameters 失效
标题翻译：用斯托克斯参数检测液晶显示参数的方法和装置
公开(公告)号：US06300954B1
公开(公告)日：2001-10-09
申请号：US09151062
申请日：1998-09-10
申请人： Susumu Sato , Ying Zhou , Zhan He , Yoshihiro Togashi
发明人： Susumu Sato , Ying Zhou , Zhan He , Yoshihiro Togashi
IPC分类号： G06T1140
CPC分类号： G02F1/1309 , G01J4/04
摘要： A polarizing plate 4 is disposed to polarize light parallel to the X axis of liquid crystal display 3, which may be optionally rotated to a position where the intensity of a light that transmits the liquid crystal display 3 takes an extreme value (maximum or minimum) and an output Ix using a photodetector 6 is measured. The polarizing plate 4 is then disposed to polarize light parallel to the Y axis to thereby measure an output Iy using the photodetector 6. The polarizing plate 4 is then disposed to polarize the light in the direction inclined by 45 degrees between the X and Y axes to thereby measure an output I45 using the photodetector 6. A quarter wavelength plate 5 optionally may be disposed between the polarizing plate 4 and the liquid display 3 such that its axial direction is inclined by 45 degrees from the polarizing direction of the polarizing plate 4 while disposing the polarizing plate 4 so as to polarize light at 45 degrees from both the X and Y axes. In this position, an output Iq45 is measured by the photodetector. Stokes parameters are calculated according to each of the measured values Ix, Iy, I45 and Iq45, and according to the calculated Stokes parameters, the thickness of the liquid crystal layer and/or the twist angle of liquid crystal molecules of the liquid crystal display 3 can be determined. Optionally, the light intensities may be measured by a two-dimensional photodetector and Stokes parameters for a plurality of points on the liquid crystal display may be simultaneously or substantially simultaneously determined.
摘要翻译：偏振板4被设置为使平行于液晶显示器3的X轴的光偏振，该液晶显示器3可以可选地旋转到使液晶显示器3透射的光的强度达到极限值（最大值或最小值）的位置，并且测量使用光电检测器6的输出Ix。然后将偏振板4设置成使平行于Y轴的光偏振，从而使用光电检测器6测量输出Iy。然后，偏振板4被设置为使光沿X轴和Y轴之间倾斜45度的方向偏振从而测量使用光电检测器6的输出I45。四分之一波长板5可选地可以设置在偏振板4和液体显示器3之间，使其轴向方向从偏振板4的偏振方向倾斜45度，同时设置偏振板4以使从X轴和Y轴两个角度偏离45度的光。在该位置，由光电检测器测量输出Iq45。根据测量值Ix，Iy，I45和Iq45中的每一个计算斯托克斯参数，并且根据计算的斯托克斯参数，液晶显示器3的液晶层的液晶层厚度和/或液晶分子的扭曲角度可以确定。可选地，光强度可以通过二维光电检测器测量，并且可以同时或基本上同时确定液晶显示器上的多个点的斯托克斯参数。

2. 发明授权

US5966195A Method of determining cell thickness and twist angle parameters of liquid crystal cell 失效
标题翻译：确定液晶盒的细胞厚度和扭转角参数的方法
公开(公告)号：US5966195A
公开(公告)日：1999-10-12
申请号：US974994
申请日：1997-11-20
申请人： Susumu Sato , Ying Zhou , Zhan He , Yoshihiro Togashi
发明人： Susumu Sato , Ying Zhou , Zhan He , Yoshihiro Togashi
IPC分类号： G01B11/06 , G01J4/00 , G01N21/21 , G02B11/06 , G02F1/13 , G02F1/1337
CPC分类号： G01N21/21 , G01B11/0641
摘要： A method of determining a parameter of a liquid crystal cell is provided in which parameters, such as the thickness of the liquid crystal layer and the angle of the twist of liquid crystal molecule orientation in the liquid crystal cell, are accurately determined in a short time with a simple apparatus. Light from a light source 1 is transmitted through a polarizing plate 2 and incident to a liquid crystal cell 3. The light is transmitted by a polarizing plate 4 and the intensity of the transmitted light is measured by a photodetector 6. Then, the outputs of the photodetector 6 for the following cases are measured: when the polarization direction of the polarizing plate 4 is set (1) in the direction of the X axis, (2) in the direction of Y axis and (3) at 45 degrees to the X and Y axes and (4) when, with the polarization direction of the polarizing plate 4 being at 45 degrees to the X and Y axes, a quarter wavelength plate 5 is inserted between the polarizing plate 4 and the liquid crystal cell 3 so that its axial direction is tilted at 45 degrees to the polarization direction of the polarizing plate 4. Stokes parameters are obtained from the measurement values, and the thickness of the liquid crystal layer and the angle of twist of liquid crystal molecule orientation are calculated from the measured Stokes parameters.
摘要翻译：提供一种确定液晶单元的参数的方法，其中在短时间内精确地确定诸如液晶层的厚度和液晶单元中液晶分子取向的扭转角度的参数用简单的装置。来自光源1的光通过偏振板2透射并入射到液晶单元3.光被偏振板4透射，透射光的强度由光电检测器6测量。然后，输出测量以下情况的光检测器6：当偏振板4的偏振方向在X轴方向上被设定为（1）时，（2）沿Y轴方向和（3）相对于 X轴和Y轴以及（4）当偏振板4的偏振方向与X轴和Y轴成45度时，四分之一波片5被插入到偏振板4和液晶单元3之间，其轴向方向与偏光板4的偏振方向倾斜45度。从测量值获得斯托克斯参数，计算液晶层的厚度和液晶分子取向的扭转角f 测量斯托克斯参数。

3. 发明授权

US07079245B2 Method and apparatus for detecting gap of liquid-crystal panel and apparatus therefor 失效
标题翻译：用于检测液晶面板间隙的方法和装置及其装置
公开(公告)号：US07079245B2
公开(公告)日：2006-07-18
申请号：US10016913
申请日：2001-12-14
申请人： Tetsuyuki Kurata , Tetsuya Satake , Takahiro Nishioka , Yoshihiro Togashi , Toshiaki Maehara , Susumu Sato
发明人： Tetsuyuki Kurata , Tetsuya Satake , Takahiro Nishioka , Yoshihiro Togashi , Toshiaki Maehara , Susumu Sato
IPC分类号： G01J4/00 , H01L27/00 , G02B27/28
CPC分类号： G02F1/1309
摘要： Light from a light source 10 is linearly polarized by a polarizer 11. Then it propagates via a half-mirror 12 almost parallel to the normal to a reflective liquid-crystal panel 13 and falls on the reflective liquid-crystal panel 13. The reflected light reflected by the reflective liquid-crystal panel 13 is received by a detector 15 via the half-mirror 12 and an analyzer 14. In this state, the reflective liquid-crystal panel 13 is rotated about an axis almost parallel to the normal to the reflective liquid-crystal panel 13 and an angle (extinction angle) at which the output signal of detector 15 reaches minimum is measured. Then, the gap of the reflective liquid-crystal panel 13 is detected based on the measured extinction angle. It is also possible to measure the output signals of detector 15 by arranging the analyzer 14 in a state in which the transmission axis thereof is almost parallel to the polarization direction of the incident light and a state in which it is almost perpendicular thereto and to detect the gap of the reflective liquid-crystal panel 13 based on the measured signals.
摘要翻译：来自光源10的光线被偏振片11线偏振，然后通过半反射镜12几乎平行于反射液晶板13的法线传播，并落在反射型液晶面板13上。反射光由反射型液晶面板13反射的反射型液晶面板13由检测器15通过半透半反镜12和分析器14接收。在该状态下，反射型液晶面板13绕与反射型液晶面板13的法线大致平行的方向旋转液晶面板13和检测器15的输出信号达到最小的角度（消光角）。然后，基于测定的消光角检测反射型液晶面板13的间隙。还可以通过将分析仪14布置在其透射轴几乎平行于入射光的偏振方向的状态和几乎与入射光的偏振方向相同的状态并检测检测器15的输出信号，基于测量信号的反射液晶板13的间隙。

4. 发明授权

US5218212A Device for optically detecting a chemical change in fluid 失效
标题翻译：用于光学检测流体中化学变化的装置
公开(公告)号：US5218212A
公开(公告)日：1993-06-08
申请号：US746990
申请日：1991-08-19
申请人： Susumu Sato , Yoshihiro Togashi , Norio Ito , Koichi Ishii , Shinji Yasuda
发明人： Susumu Sato , Yoshihiro Togashi , Norio Ito , Koichi Ishii , Shinji Yasuda
IPC分类号： G01N21/78 , H01H33/56 , H02B13/055
CPC分类号： G01N21/783 , H01H33/563 , H02B13/055 , H01H2033/567
摘要： A device for optically detecting a chemical change of fluid comprises a prism placed in fluid to be tested and a layer of color indication material formed on a surface of the prism to thereby detect a chemical change of fluid by means of a transmitted light and a reflected light in the prism.
摘要翻译：用于光学检测流体的化学变化的装置包括放置在待测试流体中的棱镜和形成在棱镜表面上的一层颜色指示材料，从而通过透射光检测流体的化学变化和反射光在棱镜。

5. 发明授权

US5075544A Optical color change device for detecting electrical abnormality 失效
标题翻译：用于检测电气异常的光学颜色变化装置
公开(公告)号：US5075544A
公开(公告)日：1991-12-24
申请号：US531165
申请日：1990-05-31
申请人： Susumu Sato , Yoshihiro Togashi , Norio Ito , Koichi Ishii , Shinji Yasuda
发明人： Susumu Sato , Yoshihiro Togashi , Norio Ito , Koichi Ishii , Shinji Yasuda
IPC分类号： G01R31/00 , G01N21/27 , G01N21/77 , G01N21/78 , G01R31/12 , H01H33/56
CPC分类号： G01N21/783 , H01H33/563 , H01H2033/567
摘要： A device for detecting an electrical abnormality in an electrical device filled with insulating gas. A surface on a light reflecting prism placed within the electrical device carries a color indicator material. The color indicator material changes color when acidic gas is present. This gas is formed when an electrical abnormality such as a short circuit occurs in the presence of the insulator gas. A light source provides light to the prism which reflects light back having a color which varies according to the color of the color indicator material. The color of the reflected light is analyzed to determine if an electrical abnormality is present.

6. 发明授权

US06822737B2 Pretilt angle measuring method and measuring instrument 失效
标题翻译：预倾角测量方法和测量仪器
公开(公告)号：US06822737B2
公开(公告)日：2004-11-23
申请号：US10009937
申请日：2002-06-04
申请人： Tetsuyuki Kurata , Takahiro Nishioka , Yoshihiro Togashi , Susumu Sato
发明人： Tetsuyuki Kurata , Takahiro Nishioka , Yoshihiro Togashi , Susumu Sato
IPC分类号： G01J400
CPC分类号： G02F1/1309 , G01B11/26
摘要： An apparatus for detecting a pretilt angle is comprised of a light source 1, a polarizer 2, a liquid-crystal cell 3, a quarter-wave plate 4, an analyzer 5, a photodetector 6, and a processing device. The processing device receives from the photodetector transmitted light intensities of light that is transmitted through the liquid-crystal cell 3 at a plurality of light incident angles. The processing device calculates Stokes parameters corresponding to the plurality of light incident angles based upon the transmitted light intensity corresponding to the plurality of light incident angles. Furthermore, an apparent retardation corresponding to the plurality of light incident angles is determined based upon the Stokes parameters corresponding to the plurality of light incident angles. The pretilt angle of the liquid-crystal cell 3 is determined based upon the determined apparent retardation corresponding to the plurality of light incident angles.
摘要翻译：用于检测预倾角的装置包括光源1，偏振器2，液晶单元3，四分之一波片4，分析器5，光电检测器6和处理装置。处理装置从光电检测器接收以多个光入射角透射通过液晶单元3的光的透射光强度。处理装置基于与多个光入射角对应的透射光强度来计算与多个光入射角对应的斯托克斯参数。此外，基于与多个光入射角对应的斯托克斯参数来确定与多个光入射角相对应的视在延迟。基于与多个光入射角相对应的确定的视在延迟来确定液晶单元3的预倾角。

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