公开(公告)号：US20090002818A1

公开(公告)日：2009-01-01

申请号：US11908236

申请日：2006-02-28

申请人： Hiroki Iwabu ,  Yoshihiro Kumagai ,  Youji Ono

发明人： Hiroki Iwabu ,  Yoshihiro Kumagai ,  Youji Ono

IPC分类号： G03B21/62

CPC分类号： G02B3/0068 ,  G02B3/0056 ,  G03B21/625

摘要： There are provided a rear projection screen and a rear projection display apparatus capable of achieving a large lenticular pitch Lp and a high pitch ratio Gp/Lp and suppressing moire. The rear projection screen includes a plurality of pixels with an outer edge having a rhombus shape inclined with respect to a horizontal direction and a vertical direction of a screen of the rear projection screen, and a lenticular lens sheet diffusing light emitted from a rear projection projector within a certain angle range. The plurality of pixels are arranged in such a way that their outer edges are adjacent to each other, a lens pitch Lp (mm) of the lenticular lens sheet satisfies Lp≧0.15, and a pitch ratio Gp/Lp of a pitch Gp (mm) of the pixels and the lens pitch Lp satisfies Gp/Lp≧1.0.

摘要翻译： 提供了能够实现大的双凸透镜间距Lp和高节距比Gp / Lp并且抑制莫尔条纹的背投屏幕和后投影显示装置。 背投影屏幕包括具有相对于背投影屏幕的屏幕的水平方向和垂直方向倾斜的菱形的外边缘的多个像素，以及从背投影投影仪发射的光漫射的双凸透镜片 在一定角度范围内。 多个像素被布置成使得它们的外边缘彼此相邻，双凸透镜片的透镜间距Lp（mm）满足Lp> = 0.15，并且间距Gp（P）的节距比Gp / Lp mm）和透镜间距Lp满足Gp / Lp> = 1.0。

公开(公告)号：US07019804B2

公开(公告)日：2006-03-28

申请号：US10490709

申请日：2002-09-06

申请人： Yoshihiro Kumagai ,  Akira Masaki ,  Tetsuya Uesaka

发明人： Yoshihiro Kumagai ,  Akira Masaki ,  Tetsuya Uesaka

IPC分类号： G02F1/1335

CPC分类号： G02F1/1397 ,  G02F1/133636 ,  G02F2202/40

摘要： A liquid crystal display device has a liquid crystal cell, a liquid crystalline substance layer, a pair of polarizers, and an optical compensation element. The twist angle of the liquid crystal cell is set to 180 to 270 degrees. The optical compensation element has a twisted structure twisted in the opposite direction to that of the liquid crystal cell. The difference in the absolute values of the twist angles between the liquid crystal cell and the optical compensation element is from 40 to 100 degrees. The difference in retardation at a wavelength λ=550 nm between the liquid crystal cell and the optical compensation element is from 100 to 250 nm. When the absolute values of the differences in retardation at wavelengths λ of 400 nm and 550 nm between the liquid crystal cell and the optical compensation element are represented by ΔR(400) and ΔR(550), respectively, and the ratio D therebetween is represented by D=ΔR(400)/ΔR(550), D is within the range of 0.5 to 1.0.

摘要翻译： 液晶显示装置具有液晶单元，液晶物质层，一对偏振器和光学补偿元件。 液晶单元的扭转角度设定为180〜270度。 光学补偿元件具有与液晶单元相反方向扭转的扭曲结构。 液晶单元和光学补偿元件之间的扭转角的绝对值的差为40〜100度。 在液晶单元和光学补偿元件之间的波长λ= 550nm处的延迟差为100〜250nm。 当分别用DeltaR（400）和DeltaR（550）表示液晶单元和光学补偿元件之间在400nm和550nm波长λ处的延迟差的绝对值，并且其间的比率D被表示 通过D = DeltaR（400）/ DeltaR（550），D在0.5至1.0的范围内。

公开(公告)号：US06750941B2

公开(公告)日：2004-06-15

申请号：US10104699

申请日：2002-03-22

申请人： Yasushi Satoh ,  Yoshihiro Kumagai ,  Takehiro Toyooka

发明人： Yasushi Satoh ,  Yoshihiro Kumagai ,  Takehiro Toyooka

IPC分类号： G02F113

CPC分类号： G02B5/3016 ,  G02B5/32 ,  G03H1/0244 ,  G03H2250/38

摘要： A complex diffraction device, which is excellent in designability, easy in setting the diffraction angle, adaptable to size increase, and easy to handle by adding a diffraction function resulting from an uneven pattern to the diffraction device comprising a liquid crystalline layer where the helical orientation of the smectic liquid crystal phase having a helical structure is maintained.

摘要翻译： 一种复杂的衍射装置，其设计性优异，易于设定衍射角度，适应尺寸增加，并且通过向包括液晶层的衍射装置添加由凹凸图案产生的衍射功能，易于处理，其中螺旋取向 的具有螺旋结构的层间液晶相保持。

公开(公告)号：US6101021A

公开(公告)日：2000-08-08

申请号：US349225

申请日：1999-07-08

申请人： Yoshihiro Kumagai ,  Akio Ichikawa ,  Rikihiro Iida ,  Masataka Nakazawa ,  Eiji Yoshida

发明人： Yoshihiro Kumagai ,  Akio Ichikawa ,  Rikihiro Iida ,  Masataka Nakazawa ,  Eiji Yoshida

IPC分类号： G02F1/01 ,  H01S3/06 ,  H01S3/067 ,  H01S3/07 ,  H01S3/083 ,  H01S3/098 ,  H01S3/10 ,  G02F1/00

CPC分类号： H01S3/06791 ,  H01S3/1109 ,  H04B10/503 ,  H04B10/508 ,  H04B10/564 ,  G02F2203/26 ,  H01S3/06754 ,  H01S3/10038 ,  H01S3/1121 ,  H01S3/136

摘要： According to the present invention, damage to a photo-detector disposed in clock signal extractor by means of an optical pulse having an optical power exceeding a rated value is prevented. A ring resonator generates a repetitive, high-frequency optical pulse. Optical branching circuit branches a portion of the optical pulse circulating through ring resonator, while optical branching circuit further branches a portion thereof to protective device. Pumping source generates an excitation light for exciting a rare-earth doped optical fiber. Optical multiplexer couples the optical pulse branched by optical branching circuit, and the excitation light. Upon excitation by means of the excitation light, rare-earth doped optical fiber amplifies and emits the incoming optical pulse. The optical power of the excitation light is adjusted such that the output of rare-earth doped optical fiber reaches a saturation power. Optical switch blocks the incoming optical pulse during the time period when pumping source is not emitting an excitation light, and during a fixed time period following the emission of the excitation light. In this manner, the entry of an excessively large optical pulse exceeding the saturation power into photo-detector at the time of starting up the power source is prevented. Optical attenuator attenuates the optical power of the optical pulse emitted from optical switch to an optical power which the photo-detector is capable of photo-detecting. Photo-detector converts the optical pulse emitted from protective device into an electronic signal; narrow band filter extracts a clock signal from the output of photo-detector; and electric amplifier amplifies the output of narrow band filter, and outputs a clock signal. Phase shifter adjusts the phase of this clock signal; electric amplifier amplifies the output of phase shifter, and outputs a clock signal to optical modulator. Optical modulator modulates the intensity of the light circulating through the ring resonator based on the clock signal, and generates an optical pulse.

公开(公告)号：US5724188A

公开(公告)日：1998-03-03

申请号：US675903

申请日：1996-07-05

申请人： Yoshihiro Kumagai ,  Ichiro Matsuzaki

发明人： Yoshihiro Kumagai ,  Ichiro Matsuzaki

IPC分类号： G03B21/62 ,  G02B27/10

CPC分类号： G03B21/625

摘要： A double-faced lenticular lens sheet including at least one incident side lens formed on a first face of the double-faced lenticular lens sheet; and at least one corresponding emergent side lens formed on a second opposite face of the double-faced lenticular lens sheet; wherein light rays incident on the at least one incident side lens parallel to an optical axis thereof pass through the lenticular lens sheet and emerge from the at least one emergent side lens; an angle of refraction .theta.1 is formed by a straight line parallel to an optical axis of the at last one incident side lens and a light ray refracted by an incident plane passing through the lenticular lens sheet; an angle of refraction .theta.2 is formed by a straight line parallel to an optical axis of the at least one emergent side lens and the light ray refracted by and emitted from an emergent plane; .DELTA..theta.1 is an absolute value of the angle of refraction .theta.1 on the incident plane; .DELTA..theta.2 is an absolute value of an angle of refraction given by (.theta.2-.theta.1) on the emergent plane; a ratio between .DELTA..theta.1 and .DELTA..theta.2 given by (.DELTA..theta.2/.DELTA..theta.1) is 1.0 or more when a center of the lenticular lens sheet rests on the optical axis of the at least one incident side lens and a width of the lenticular lens sheet is 80% or less of the lens pitch of the at least one incident side lens.

摘要翻译： 一种双面双凸透镜片，包括形成在双面双凸透镜片的第一面上的至少一个入射侧透镜; 以及形成在双面双凸透镜片的第二相对面上的至少一个相应的紧急侧透镜; 其中入射到所述至少一个入射侧透镜平行于其光轴的光线穿过所述双凸透镜片并从所述至少一个出射侧透镜出射; 折射角θ1由平行于最后一个入射侧透镜的光轴的直线和通过双凸透镜片的入射面折射的光线形成; 折射角θ2由平行于至少一个出射侧透镜的光轴的直线和从出射面发射的光线形成; DELTAθ1是入射角上的折射角θ1的绝对值; DELTAθ2是在出射面上由（θ2-θ1）给出的折射角的绝对值; 当双凸透镜片的中心位于至少一个入射侧透镜的光轴上时，由（DELTAθ2 /DELTAθ1）给出的DELTAθ1和DELTAθ2之间的比率为1.0或更大， 双凸透镜片是至少一个入射侧透镜的透镜间距的80％以下。

公开(公告)号：US09109977B2

公开(公告)日：2015-08-18

申请号：US13982423

申请日：2012-01-27

申请人： Masato Kishi ,  Kazuo Hotate ,  Takashi Yari ,  Yoshihiro Kumagai

发明人： Masato Kishi ,  Kazuo Hotate ,  Takashi Yari ,  Yoshihiro Kumagai

IPC分类号： G01M11/00 ,  G01D5/353

CPC分类号： G01M11/33 ,  G01D5/35348 ,  G01M11/39

摘要： Provided is an optical fiber characteristics measurement device that is provided with: a light source for emitting laser light modulated by a specified modulation frequency; an incident means for receiving the laser light from the light source as continuous light and pulse light from one end and the other end of an optical fiber, respectively; and a light detector for detecting light emitted from the optical fiber, the optical fiber characteristics measurement device measuring the characteristics of the optical fiber using the detection results of the light detector, wherein the optical fiber characteristics measurement device is characterized in being provided with a synchronous detector that extracts, from among the detection signals output from the light detector, detection signals obtained by detecting the light in the vicinity of a measurement point set in the optical fiber, and synchronously detects the extracted detection signals using a synchronization signal having a specified period.

摘要翻译： 提供一种光纤特性测量装置，其设置有：用于发射由特定调制频率调制的激光的光源; 用于从光源接收来自光纤的一端和另一端的连续光和脉冲光的入射装置; 以及光检测器，用于检测从光纤发射的光，光纤特性测量装置使用光检测器的检测结果测量光纤的特性，其中光纤特性测量装置的特征在于具有同步 检测器，从光检测器输出的检测信号中提取通过检测在光纤中设置的测量点附近的光获得的检测信号，并使用具有指定周期的同步信号同步检测提取的检测信号 。

公开(公告)号：US20080013171A1

公开(公告)日：2008-01-17

申请号：US11628221

申请日：2005-05-24

申请人： Yoshihiro Kumagai ,  Youji Ono ,  Masanori Ogino

发明人： Yoshihiro Kumagai ,  Youji Ono ,  Masanori Ogino

IPC分类号： G03B21/60

CPC分类号： G02B3/08 ,  G02B27/0018 ,  G03B21/625

摘要： [PROBLEMS] A method of producing a precision, low-cost resin molded article capable of improving a light utilizing efficiency and reducing a stray light caused by a light that enters a rise surface and is reflected off a reflection surface in an abnormal direction or refracted. [MEANS OF SOLVING PROBLEMS] A Fresnel lens sheet which comprises a prism row that is provided on the incident-side surface of the Fresnel lens sheet to deflect an incident light toward an exit side, at least part of the prism row having an incident surface for refracting an incident light from a light source, a reflection surface for totally reflecting light beam refracted at the incident surface, and a rise surface between the center-side terminal point of the incident surface and the outer periphery-side terminal point of the reflection surface, the three surfaces, that is the reflection surface, the incident surface and the rise surface constituting one unit of prism, characterized in that the rise surface is reversely tilted toward the outer periphery side starting at the crossing point between the incident surface and the rise surface, and a Fresnel light axis center portion is formed eccentrically so as to fall outside a lens sheet range.

摘要翻译： 本发明提供一种精密，低成本的树脂成形体的制造方法，其能够提高光的利用效率，并且减少由入射到上升面的光引起的杂散光，并且反射出异常方向的反射面或被折射 。 解决问题的手段一种菲涅耳透镜片，其包括设置在菲涅尔透镜片的入射侧表面上以将入射光偏转到出射侧的棱镜列，所述棱镜列的至少一部分具有入射表面 用于折射来自光源的入射光，用于完全反射在入射表面处折射的光束的反射表面和入射表面的中心侧终点与反射的外周边终点之间的上升表面 表面，构成一个单位棱镜的反射面，入射面和上升面的三个表面，其特征在于，上升面从入射面和入射面之间的交叉点向外周侧反向倾斜 并且偏心地形成菲涅尔光轴中心部分，以便落在透镜片材范围之外。

公开(公告)号：US20050117212A1

公开(公告)日：2005-06-02

申请号：US10502642

申请日：2003-02-04

申请人： Yoshihiro Kumagai ,  Ichiro Matsuzaki

发明人： Yoshihiro Kumagai ,  Ichiro Matsuzaki

IPC分类号： G03B21/625 ,  G03B21/10 ,  G03B21/62 ,  G03B21/60

CPC分类号： G03B21/62 ,  G03B21/625

摘要： An object of the invention is to provide a rear projection screen that has a high contrast and produces high-quality images. The object is achieved by a rear projection screen and rear projection display apparatus having the same. This rear projection screen contains a vertical lenticular lens sheet on the viewer side, and the vertical lenticular lens sheet includes a lenticular lens capable of vertically refracting the incident light on its incident surface, black stripes in the vicinity of the focus of the lenticular lens in portions where the incident light does not pass through, and a flat surface on its viewer side.

摘要翻译： 本发明的目的是提供一种具有高对比度并产生高质量图像的背投屏幕。 该目的通过具有其的背投屏幕和背投显示装置来实现。 该背面投影屏幕包括观察者侧的垂直双凸透镜片，并且垂直双凸透镜片包括能够垂直折射入射表面上的入射光的双凸透镜，双凸透镜的焦点附近的黑色条纹 入射光不通过的部分和观察者侧的平坦表面。

公开(公告)号：US06327089B1

公开(公告)日：2001-12-04

申请号：US09405179

申请日：1999-09-24

申请人： Kenji Hosaki ,  Yoshihiro Kumagai ,  Motoh Asakura ,  Shinji Nishikawa ,  Kazuya Kobayashi

发明人： Kenji Hosaki ,  Yoshihiro Kumagai ,  Motoh Asakura ,  Shinji Nishikawa ,  Kazuya Kobayashi

IPC分类号： G02B2710

CPC分类号： B32B17/10036 ,  B32B17/10018 ,  G02B5/30 ,  G02B27/01 ,  G02B27/0101 ,  G02B27/283 ,  G02B2027/012 ,  Y10T428/31801

摘要： A laminated transparent structure for a reflective display which is used, for example, as a head-up display of an automotive vehicle. The laminated transparent structure comprises a glass plate. A transparent layer is bonded to the glass plate. An optical rotation film is disposed between the glass plate and the transparent layer. Additionally, a hot-melt adhesive is disposed between the optical rotation film and the glass plate to bond the optical rotation film to the glass plate.

摘要翻译： 用于反射显示器的层压透明结构，其例如用作机动车辆的平视显示器。 层压透明结构包括玻璃板。 透明层结合到玻璃板上。 光学旋转膜设置在玻璃板和透明层之间。 另外，在光学旋转膜和玻璃板之间设置热熔粘合剂，以将光学旋转膜粘合到玻璃板上。

公开(公告)号：US5432249A

公开(公告)日：1995-07-11

申请号：US361122

申请日：1994-12-21

申请人： Yoshihiro Kumagai ,  Takuya Matsumoto ,  Iwane Shiozaki ,  Shigeki Takikawa

发明人： Yoshihiro Kumagai ,  Takuya Matsumoto ,  Iwane Shiozaki ,  Shigeki Takikawa

IPC分类号： C08G63/547 ,  C08G63/60 ,  C08G63/54

CPC分类号： C08G63/547 ,  C08G63/605

摘要： The present invention provides a novel liquid crystalline polyester comprising structural units represented by the following general formulae A, B, C and D: ##STR1## where X and Y are each independently H, Cl, Br or an alkyl group having 1 to 4 carbon atoms, the molar ratio of A/B is in the range from 49/1 to 20/30 and that of C/D is in the range from 10/40 to 45/5.

摘要翻译： 本发明提供一种新型的液晶聚酯，其包含由以下通式A，B，C和D表示的结构单元：其中X和Y各自独立地为H，Cl，Br 或具有1至4个碳原子的烷基，A / B的摩尔比在49/1至20/30的范围内，C / D的摩尔比在10/40至45/5的范围内。