公开(公告)号：US6049410A

公开(公告)日：2000-04-11

申请号：US206989

申请日：1998-12-08

申请人： Shintaro Nakagaki ,  Tsutou Asakura ,  Fujiko Koyama ,  Tatsuru Kobayashi

发明人： Shintaro Nakagaki ,  Tsutou Asakura ,  Fujiko Koyama ,  Tatsuru Kobayashi

IPC分类号： G02F1/13357 ,  G02F1/03 ,  G02B5/30 ,  G02F1/1335

CPC分类号： G02F1/13362 ,  G02F1/133621 ,  G02F2203/02

摘要： A spatial light modulator and a lighting system used in, for example, projection displays are provided. The lighting system has a polarizing plate optically disposed in parallel to a light modulating layer of the spatial light modulator, thereby orienting the polarization of readout light beams incident on the spatial light modulator in the same direction to increase the contrast of images projected on a screen. The spatial light modulator is provided with a coupling prism having a side surface opposed to an entrance surface on which the readout light beams are incident. The side surface is so inclined inward as to allow stray light in the coupling prism to go out of the coupling prism without being reflected, thereby eliminating a decrease in contrast of images with a screen caused by the stray light.

摘要翻译： 提供了一种用于例如投影显示器的空间光调制器和照明系统。 照明系统具有与空间光调制器的光调制层平行地光学设置的偏振片，从而沿着相同的方向定向入射到空间光调制器上的读出光束的偏振，以增加投影在屏幕上的图像的对比度 。 空间光调制器设置有耦合棱镜，其具有与读出光束入射的入射面相对的侧表面。 侧面是向内倾斜的，以允许耦合棱镜中的杂散光从耦合棱镜出来而不被反射，从而消除了由杂散光引起的屏幕的图像的对比度的降低。

公开(公告)号：US06398365B1

公开(公告)日：2002-06-04

申请号：US09520948

申请日：2000-03-08

申请人： Ryusaku Takahashi ,  Shintaro Nakagaki ,  Tsutou Asakura ,  Fujiko Koyama

发明人： Ryusaku Takahashi ,  Shintaro Nakagaki ,  Tsutou Asakura ,  Fujiko Koyama

IPC分类号： G03B2100

CPC分类号： G02F1/133621 ,  G02B5/203 ,  G02B27/1086 ,  G02B27/145 ,  G02B27/148 ,  G02B27/28 ,  H04N9/3108

摘要： A projection display apparatus (100) is formed by a light source (4) radiating white light w, a collimator lens (5) that converts condensed light flux from the light source (4) to collimated light flux, a cold mirror (6) for eliminating unwanted infrared light included in the white light w, an integrator that makes the intensity distribution of the illumination light on an object to be illuminated uniform, a reflective mirror (8) that reflects light flux from the integrator (7) at a prescribed angle, a polarizer (9) that polarizes separated light of each wavelength band, a spatial light modulation section (10), a coupling prism (11), and a projection lens (12).

摘要翻译： 投影显示装置（100）由照射白光w的光源（4）形成，将来自光源（4）的冷凝光束转换为准直光束的准直透镜（5），冷镜（6） 为了消除包含在白光w中的不需要的红外光，使得照明光在被照射物体上的强度分布均匀的积分器，反射镜（8），反射镜（8）将来自积分器（7）的光通量反映在规定的 角度，使每个波长带的分离光偏振的偏振器（9），空间光调制部分（10），耦合棱镜（11）和投影透镜（12）。

公开(公告)号：US5486878A

公开(公告)日：1996-01-23

申请号：US313585

申请日：1994-09-23

申请人： Ichiro Negishi ,  Tetsuji Suzuki ,  Fujiko Koyama ,  Yuji Uchiyama ,  Hiroyuki Bonde ,  Toshio Konno ,  Ryusaku Takahashi ,  Toshiaki Shou

发明人： Ichiro Negishi ,  Tetsuji Suzuki ,  Fujiko Koyama ,  Yuji Uchiyama ,  Hiroyuki Bonde ,  Toshio Konno ,  Ryusaku Takahashi ,  Toshiaki Shou

IPC分类号： H04N9/31

CPC分类号： H04N9/31

摘要： In a color image display apparatus, light beams intensity modulated by a green color image signal are deflected by an ocillating mirror, and then focused on a photo-conductive layer (PCL) member of a light-written type spacial light modulation element (SLM) through two focusing lenses for light write operation. Light beams intensity modulated by a time-axis compressed time-divisional image signal of two remaining colors (red and blue) are deflected by another mirror oscillated simultaneously with the ocillating mirror, and then focused on a PCL member of a SLM of the same type through two focusing lenses for light write operation. A read light beam is resolved into the light of the green wave length band and the lights of red and blue wave length bands, respectively, and then given to the SLMs, respectively for light read operation. The two read light beams reflected by the SLMs are synthesizing, and then projected on a screen through a common projection lens.

摘要翻译： 在彩色图像显示装置中，由绿色图像信号调制的光束强度被遮光镜偏转，然后聚焦在光写入型空间光调制元件（SLM）的光导层（PCL） 通过两个聚焦镜头进行光写操作。 由两个剩余颜色（红色和蓝色）的时间轴压缩时分图像信号调制的光束强度由与镜面反射镜同时振荡的另一个镜片偏转，然后聚焦在相同类型的SLM的PCL部件上 通过两个聚焦镜头进行光写操作。 读取光束分别被分解成绿色波长带和红色和蓝色波长波段的光，然后分别给予SLM用于光读取操作。 由SLM反射的两个读取光束正在合成，然后通过公共投影透镜投影在屏幕上。

公开(公告)号：US06174060B1

公开(公告)日：2001-01-16

申请号：US09139622

申请日：1998-08-25

申请人： Hirofumi Imaoka ,  Satoru Moriya ,  Tetsuji Suzuki ,  Fujiko Koyama ,  Ryusaku Takahashi ,  Yasuo Ishizaka ,  Motomu Takada

发明人： Hirofumi Imaoka ,  Satoru Moriya ,  Tetsuji Suzuki ,  Fujiko Koyama ,  Ryusaku Takahashi ,  Yasuo Ishizaka ,  Motomu Takada

IPC分类号： G03B2114

CPC分类号： G02B27/283 ,  H04N9/3105

摘要： A color separating/light guiding optics comprises two independent dichroic mirrors, reflection mirrors and correcting lenses. A horizontal plane region occupied by these optical components is entirely involved in a horizontal plane region occupied by a light modulating/color compositing/image projecting optics. A red beam is guided along a detoured optical path extending across a dead space below a projection lens. Although the optical path length of the red beam becomes longer than those of the blue beam and the green beam, the detoured optical path provides a sufficient space for installing the correcting lenses. The substantial optical path lengths of three primary color beams can be equalized with each other by the provision of these correcting lenses.

摘要翻译： 颜色分离/光导光学器件包括两个独立的分色镜，反射镜和校正透镜。 由这些光学部件占据的水平面区域完全参与由光调制/颜色合成/图像投影光学器件占据的水平面区域。 红色光束沿着延伸穿过投影透镜下方的死空间的弯曲光路被引导。 虽然红色光束的光程长度比蓝色光束和绿色光束的光路长度长，但是绕线光路提供了用于安装校正透镜的足够的空间。 通过提供这些校正透镜可以使三个原色光束的实质光路长度彼此相等。