公开(公告)号：US07436399B2

公开(公告)日：2008-10-14

申请号：US10379576

申请日：2003-03-06

申请人： Keijiro Naito

发明人： Keijiro Naito

IPC分类号： G09G5/00

CPC分类号： H04N9/3144 ,  H04N5/74 ,  H04N9/315

摘要： A projector (image display apparatus) having enhanced visual mute or A/V mute functions includes a light modulation element for displaying an image, a lamp for illuminating the light modulation element, and a fan for cooling the lamp; the image display apparatus further includes a visual mute means for setting a visual mute mode in which no image or a predetermined image is displayed on a display screen thereof, and a lamp output luminance adjusting means for adjusting the output luminance of the lamp in response to the setting and canceling of the visual mute mode by the visual mute means.

摘要翻译： 具有增强的视觉静音或A / V静音功能的投影仪（图像显示装置）包括用于显示图像的光调制元件，用于照亮光调制元件的灯和用于冷却灯的风扇; 图像显示装置还包括用于设置在其显示屏幕上不显示图像或预定图像的视觉静音模式的视觉静音装置，以及用于响应于图像显示装置调节灯的输出亮度的灯输出亮度调节装置 通过视觉静音方式设置和取消视觉静音模式。

公开(公告)号：US06297791B1

公开(公告)日：2001-10-02

申请号：US09196156

申请日：1998-11-20

申请人： Keijiro Naito ,  Kazuto Shinohara

发明人： Keijiro Naito ,  Kazuto Shinohara

IPC分类号： G09G336

CPC分类号： G09G3/34 ,  G09G3/2011 ,  G09G3/3406 ,  G09G3/3611 ,  G09G2310/0297 ,  G09G2320/0276 ,  G09G2320/029 ,  G09G2320/066 ,  G09G2360/145

摘要： A display device performs various types of adjustment by canceling luminance dispersion caused by a light source at the time of optical illumination from the light source and correctly sets a gamma correction characteristic even when optical power from the light source varies or is abnormal. In luminance measurement of a display device, an adjustment method includes measuring transmitted light using a sensor and a reference sensor, calculating correction values on the basis of fluctuation values of reference data derived from measured data by the sensor and the reference data by the reference sensor, correcting the measured data, and thereafter converting the data into gradation values.

摘要翻译： 显示装置通过在从光源进行光照射时消除由光源引起的亮度色散并且即使在来自光源的光功率变化或异常的情况下也能够正确地设定伽马校正特性来进行各种调整。 在显示装置的亮度测量中，调节方法包括使用传感器和参考传感器来测量透射光，基于由传感器测量的数据导出的参考数据的波动值和基准传感器的参考数据来计算校正值 校正测量数据，然后将数据转换为灰度值。

公开(公告)号：US5973661A

公开(公告)日：1999-10-26

申请号：US575930

申请日：1995-12-20

申请人： Mamoru Kobayashi ,  Yasuji Yamazaki ,  Toru Aoki ,  Keijiro Naito

发明人： Mamoru Kobayashi ,  Yasuji Yamazaki ,  Toru Aoki ,  Keijiro Naito

IPC分类号： G09G3/20 ,  G09G3/36 ,  H04N3/12 ,  H04N9/31

CPC分类号： H04N9/312 ,  G09G3/3648 ,  G09G3/3688 ,  H04N3/127 ,  H04N9/3105 ,  G09G2310/0297 ,  G09G3/2011 ,  G09G3/3614

摘要： An image display device incorporating a specialized phase expansion circuit, a rotation circuit, a sampling device and unique controlling circuitry. The phase expansion circuit includes a plurality of trail buffers or sample holder circuits for receiving a serially applied train of pixel image signals, expanding or extending the assertion cycle time and generating a corresponding plurality of expanded image signal trains in parallel. Preferably, one combination of expanded pixel image signals corresponding to specific position of pixels arranged in matrix in one train is different from another combination of expanded pixel image signals. The rotational circuit includes a plurality of selecting circuits for receiving the manifold trains of expanded pixel image signals generated by the phase expansion circuit. Each selecting circuit preferably selects one of these trains of expanded pixel image signals and generates a corresponding second train of expanded pixel image signals in parallel according to variable combinations specified by the control circuit. The sampling device receives these second trains of expanded pixel image signals, reconstructs and generates image signal for driving pixels. The control circuitry directs the phase expansion circuit to periodically change the pixel column ordering combinations used to generate the first set of expanded image signal trains. As the column ordering combinations vary, the preferred control circuitry may correspondingly instruct the rotation to reorder or decode the received image signal trains into an expanded signal train in a form suitable for sampling image reconstruction and display. Therefore, even if there are variations of characteristics of individual components such as transistors in the phase expansion circuit and such variation affects uniform brightness of each pixel, these differences in characteristics can be dissipated through periodic resequencing. Consequently, a uniform high-resolution image can be displayed and perceived in the display area.

公开(公告)号：US07055966B2

公开(公告)日：2006-06-06

申请号：US10682824

申请日：2003-10-10

申请人： Akira Momose ,  Atsushi Miyazawa ,  Keijiro Naito

发明人： Akira Momose ,  Atsushi Miyazawa ,  Keijiro Naito

IPC分类号： G03B21/14 ,  G03B21/16 ,  G03B21/20 ,  G03B21/26 ,  G02B26/02 ,  F21V1/03 ,  H04N5/74

CPC分类号： G03B21/18

摘要： When a video signal is inputted to a projector (10) through a video input terminal, a luminance peak value of an image of the video signal is detected by an image-analyzing circuit (61) to be outputted to a CPU (71). A gain-adjusting circuit (63) adjusts a luminance signal in the video signal based on a command from the CPU (71). The CPU (71) determines a gain adjustment amount based on the luminance peak value of the image obtained by the image-analyzing circuit (61) and outputs the result to the gain-adjusting circuit (63). For instance, when the luminance peak value (Ip) of the image is 50% of the upper limit (Imax) thereof, a gain-adjusting amount AG is doubled. In this case, an illuminating light volume of a light valve (44a) has to be reduced to 50%, which is achieved by light-attenuation by a light-source lamp (21) and an open/close light shield (23).

摘要翻译： 当通过视频输入端子将视频信号输入到投影仪（10）时，由图像分析电路（61）检测视频信号的图像的亮度峰值，以输出到CPU（71）。 增益调整电路（63）根据来自CPU（71）的命令调整视频信号中的亮度信号。 CPU（71）基于由图像分析电路（61）获得的图像的亮度峰值确定增益调整量，并将结果输出到增益调整电路（63）。 例如，当图像的亮度峰值（Ip）为其上限（Imax）的50％时，增益调整量AG增加一倍。 在这种情况下，光阀（44a）的照明光量必须减小到通过光源灯（21）和开闭光屏蔽（23）的光衰减来实现的50％ 。

公开(公告)号：US20050068505A1

公开(公告)日：2005-03-31

申请号：US10682824

申请日：2003-10-10

申请人： Akira Momose ,  Atsushi Miyazawa ,  Keijiro Naito

发明人： Akira Momose ,  Atsushi Miyazawa ,  Keijiro Naito

IPC分类号： G02F1/13357 ,  F21V11/18 ,  G02F1/133 ,  G03B21/00 ,  G03B21/14 ,  G03B21/18 ,  G03B21/26 ,  H04N5/74

CPC分类号： G03B21/18

摘要： When a video signal is inputted to a projector (10) through a video input terminal, a luminance peak value of an image of the video signal is detected by an image-analyzing circuit (61) to be outputted to a CPU (71). A gain-adjusting circuit (63) adjusts a luminance signal in the video signal based on a command from the CPU (71). The CPU (71) determines a gain adjustment amount based on the luminance peak value of the image obtained by the image-analyzing circuit (61) and outputs the result to the gain-adjusting circuit (63). For instance, when the luminance peak value (lp) of the image is 50% of the upper limit (Imax) thereof, a gain-adjusting amount AG is doubled In this case, an illuminating light volume of a light valve (44a) has to be reduced to 50%, which is achieved by light-attenuation by a light-source lamp (21) and an open/close light shield (23).

摘要翻译： 当通过视频输入端子将视频信号输入到投影仪（10）时，由图像分析电路（61）检测视频信号的图像的亮度峰值，以输出到CPU（71）。 增益调整电路（63）根据来自CPU（71）的命令调整视频信号中的亮度信号。 CPU（71）基于由图像分析电路（61）获得的图像的亮度峰值确定增益调整量，并将结果输出到增益调整电路（63）。 例如，当图像的亮度峰值（lp）为其上限（Imax）的50％时，增益调整量AG加倍。在这种情况下，光阀（44a）的照明光量具有 减少到通过光源灯（21）和开闭光屏蔽（23）的光衰减来实现的50％。

公开(公告)号：US06693629B1

公开(公告)日：2004-02-17

申请号：US09101329

申请日：1998-07-07

申请人： Keijiro Naito

发明人： Keijiro Naito

IPC分类号： G06T100

CPC分类号： H04N9/3182 ,  G09G3/002 ,  H04N5/74 ,  H04N21/4532 ,  H04N21/485

摘要： A projector capable of setting and storing usage environment data peculiar to each user in a selectable manner is provided, thereby facilitating reduction of trouble and time of resetting when reusing. The liquid crystal projector samples and reproduces image signals input from a computer in accordance with display pixels. This liquid crystal projector selectably stores usage environment data peculiar to each user, selects the stored usage environment data the next time the liquid crystal projector is used, and reproduces image signal input based on the selected usage environment data.

摘要翻译： 提供能够以可选择的方式设置和存储每个用户特有的使用环境数据的投影仪，从而有助于减少重复使用时的故障和复位时间。 液晶投影仪根据显示像素对从计算机输入的图像信号进行采样和再现。 该液晶投影仪可选择地存储每个用户特有的使用环境数据，在下一次使用液晶投影仪时选择存储的使用环境数据，并且基于所选择的使用环境数据再现输入的图像信号。

公开(公告)号：US06276802B1

公开(公告)日：2001-08-21

申请号：US09288222

申请日：1999-04-08

申请人： Keijiro Naito

发明人： Keijiro Naito

IPC分类号： G03B2122

CPC分类号： G03B21/10

摘要： Methods and apparatus for using more effectively the front side area of a rear projection display as a screen positioning area disclosed. Almost all of the p-polarized light beams emitted from an image projector are reflected by a polarizing selection element, and almost all of the reflected light beams are converted into s-polarized light beams by a polarizing conversion mirror as the light beams are reflected towards a screen. Of the s-polarized light beams produced as the light beams are reflected by the polarizing conversion mirror, those that are not incident upon the polarizing selection element strike the screen in order to form an image. On the other hand, those that are incident upon the polarizing selection element pass through the polarizing selection element and strike the screen in order to form an image thereon.

摘要翻译： 更有效地使用背投影显示器的前侧区域作为屏幕定位区域的方法和装置。 从图像投影仪发射的几乎所有的p偏振光都被偏振选择元件反射，并且随着光束被反射向几乎所有的反射光束被偏振转换镜转换成s偏振光束 一个屏幕。 在由偏光转换镜反射的光束产生的s偏振光束中，没有入射到偏振选择元件的S偏振光束撞击屏幕以形成图像。 另一方面，入射到偏振选择元件的那些通过偏振选择元件并撞击屏幕以在其上形成图像。

公开(公告)号：US5909944A

公开(公告)日：1999-06-08

申请号：US34599

申请日：1998-03-03

申请人： Akitaka Yajima ,  Motoyuki Fujimori ,  Mutsuya Furuhata ,  Tomiyoshi Ushiyama ,  Terunaga Koide ,  Toshiaki Hashizume ,  Kiyoshi Miyashita ,  Hiroshi Harima ,  Keijiro Naito

发明人： Akitaka Yajima ,  Motoyuki Fujimori ,  Mutsuya Furuhata ,  Tomiyoshi Ushiyama ,  Terunaga Koide ,  Toshiaki Hashizume ,  Kiyoshi Miyashita ,  Hiroshi Harima ,  Keijiro Naito

IPC分类号： G02B27/14 ,  G03B21/14 ,  H04N5/74 ,  H04N9/31

CPC分类号： G03B33/12 ,  G02B27/1046 ,  G02B27/1073 ,  G02B27/145 ,  G02B27/149 ,  H04N9/3105 ,  H04N9/312 ,  H04N9/3141 ,  H04N9/3144 ,  H04N9/317 ,  H04N9/3182

摘要： A projection-type display apparatus in which the entry of light rays to the back side of liquid crystal light valves from dichroic prism that composes optical system light synthesizer is prevented. To this end, a projection display according to the present invention preferably includes a color synthesizer for combining colored and modulated light beams, comprising: a square column dichroic prism composed of four triangle prisms having equal refractive index together whose cross sections are right isosceles triangles such that three light valves are located adjacent to three exterior peripheral surfaces of dichroic prism to receive colored and modulated light beams therefrom and; a filter for absorbing light with a specified wavelength range, leaked from surface of dichroic prism at the opposite side of incident light surface and directed to liquid crystal light valve, the filter being located between liquid crystal light valves and surface of dichroic prism. As for construction of the dichroic prism itself, specifically, of the four aforementioned triangular prisms, the first triangular prism and the aforementioned third triangular prism are mutually affixed in a condition in which there is a first step difference in the vertical direction. The first exposed side is formed on one edge of the affixed side of the first triangular prism. Similarly, the second triangular prism and the fourth triangular prism are attached to each other such that there is a second step difference on the same edge, and a second exposed side is formed on one edge of the affixed surface of the second triangular prism. Further, the first and the third triangular prisms and the second and the fourth triangular prisms are attached, with a step difference between them, in such a way that the aforementioned first exposed side and the aforementioned second exposed side are located on the edges facing the same direction; and a third exposed surface that is orthogonal to the aforementioned first and second exposed surfaces is formed between the aforementioned first triangular prism and the aforementioned second triangular prism.

公开(公告)号：US5905540A

公开(公告)日：1999-05-18

申请号：US708139

申请日：1996-08-27

申请人： Kiyoshi Miyashita ,  Satoshi Hirashima ,  Keijiro Naito ,  Mamoru Kobayashi

发明人： Kiyoshi Miyashita ,  Satoshi Hirashima ,  Keijiro Naito ,  Mamoru Kobayashi

IPC分类号： H04N3/14 ,  H04N5/74 ,  H04N9/31 ,  H04N9/69 ,  H04N5/202

CPC分类号： H04N9/312 ,  H04N9/3105 ,  H04N9/3141 ,  H04N9/3144 ,  H04N9/317 ,  H04N9/3182 ,  H04N9/69 ,  H04N2005/745

摘要： A projection-type video display in which the entire input video signal is first digitally corrected through digital gamma correction. Then, a subset of the corrected video signal is corrected again through analogue correction techniques. In particular this portion of the digitally corrected video signal corresponds to the subject where slopes of applied voltage-transmissivity characteristic curve (V-T curve) of liquid crystal changes relatively rapidly. The result is a more accurate gamma correction which is also less expensive than conventional, purely digital gamma correction systems. Another feature is the inclusion of three liquid crystal light valves, each having have a plurality of pixels arranged in the matrix and identical shift registers in such a way that pixels of one scanning line are driven selectively and sequentially from the same horizontal direction according to a given set of video signals, a memory where at least video signals for pixels of one scanning line are written and stored, a first drive controller for outputting video signals of one scanning line from memory in the order in which the video signals were written and supplying the video signals to pixels of a scanning line in at least one of light valves, and a second drive controller for outputting video signals of one scanning line from memory in a reverse order in which video signals were written thereto for supplying another light valve. Also disclosed is recognition unit for recognizing different types of input video signal format systems and a write controller for controlling the way of writing input video signals of each scanning line into pixels of horizontal scanning lines in the light valves based on different type of input video signal format system.

公开(公告)号：US6115084A

公开(公告)日：2000-09-05

申请号：US287910

申请日：1999-04-07

申请人： Kiyoshi Miyashita ,  Satoshi Hirashima ,  Keijiro Naito ,  Mamoru Kobayashi

发明人： Kiyoshi Miyashita ,  Satoshi Hirashima ,  Keijiro Naito ,  Mamoru Kobayashi

IPC分类号： H04N3/14 ,  H04N5/74 ,  H04N9/31 ,  H04N9/69

CPC分类号： H04N9/312 ,  H04N9/3105 ,  H04N9/3141 ,  H04N9/3144 ,  H04N9/317 ,  H04N9/3182 ,  H04N9/69 ,  H04N2005/745

摘要： A projection-type video display in which the entire input video signal is first digitally corrected through digital gamma correction. Then, a subset of the corrected video signal is corrected again through analogue correction techniques. In particular this portion of the digitally corrected video signal corresponds to the subject where slopes of applied voltage-transmissivity characteristic curve (V-T curve) of liquid crystal changes relatively rapidly. The result is a more accurate gamma correction which is also less expensive than conventional, purely digital gamma correction systems. Another feature is the inclusion of three liquid crystal light valves, each having have a plurality of pixels arranged in the matrix and identical shift registers in such a way that pixels of one scanning line are driven selectively and sequentially from the same horizontal direction according to a given set of video signals, a memory where at least video signals for pixels of one scanning line are written and stored, a first drive controller for outputting video signals of one scanning line from memory in the order in which the video signals were written and supplying the video signals to pixels of a scanning line in at least one of light valves, and a second drive controller for outputting video signals of one scanning line from memory in a reverse order in which video signals were written thereto for supplying another light valve. Also disclosed is recognition unit for recognizing different types of input video signal format systems and a write controller for controlling the way of writing input video signals of each scanning line into pixels of horizontal scanning lines in the light valves based on different type of input video signal format system.

摘要翻译： 投影型视频显示器，其中整个输入视频信号通过数字伽马校正被首先数字校正。 然后，通过模拟校正技术再次校正经校正的视频信号的子集。 特别地，数字校正视频信号的这一部分对应于液晶的施加的电压 - 透射率特性曲线（V-T曲线）的斜率相对快速地变化的对象。 结果是更准确的伽马校正，其也比常规的纯数字伽马校正系统便宜。 另一个特征是包括三个液晶光阀，每个液晶光阀具有排列在矩阵中的多个像素和相同的移位寄存器，使得一个扫描线的像素根据相同的水平方向选择性地和顺序地被驱动 给定的一组视频信号，至少存储一个扫描线的像素的视频信号的存储器，用于以写入和供给视频信号的顺序从存储器输出一条扫描线的视频信号的第一驱动控制器 视频信号到光阀中的至少一个中的扫描线的像素;以及第二驱动控制器，用于以与写入视频信号的方式相反的顺序从存储器输出一条扫描线的视频信号，以提供另一个光阀。 还公开了用于识别不同类型的输入视频信号格式系统的识别单元和用于基于不同类型的输入视频信号来控制将每条扫描线的输入视频信号写入水平扫描线的像素的方式的写入控制器 格式系统。