Patents by Inventor Kyoichiro Oda
Kyoichiro Oda has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20050078081Abstract: A liquid crystal display device comprising a including signal correcting means correction for correcting a level of an original image signal to a level with which transmittance in a steady state of the pixel with the original image signal is attained within one frame period, a horizontal driving means for driver applying a voltage in correspondence with the corrected image signal to a liquid crystal material, and an illumination device for illuminating the display panel with a plurality of light emitting regions thereof, said the light emitting regions sequentially turns turning on and off in synchronization with the application of the corrected image signal, while holding a definite time delay thereto.Type: ApplicationFiled: November 5, 2004Publication date: April 14, 2005Applicants: Mitsubishi Denki Kabushiki Kaisha, Advanced Display Inc.Inventors: Kyoichiro Oda, Akimasa Yuuki, Shin Tahata, Toshio Tobita, Shiro Miyake, Kazuhiro Kobayashi, Keiichi Murayama
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Publication number: 20050052387Abstract: The present invention is directed to provide a driving circuit and driving method for a LCD having high performance of moving image displaying within few amount of memory and downscaled circuit. In the present invention, a voltage applied to a pixel to drive liquid crystal material in the pixel is determined as a voltage with which the transparency of the pixel at the end of the current field becomes the designated transparency. To determine the voltage, a data table for quick response in which output data is stored in correspondence with some of the possible value of a preceding field image data and some of the possible value of the current field image data is employed, and the output data corresponding to the preceding field image data and the current field image data is determined by the data table through linear interpolation. The voltage corresponding to the output data is applied to the pixel.Type: ApplicationFiled: October 22, 2004Publication date: March 10, 2005Applicants: MITSUBISHI DENKI KABUSHIKI KAISHA, ADVANCED DISPLAY INC.Inventors: Kyoichiro Oda, Akimasa Yuuki, Shin Tahata, Toshio Tobita, Shiro Miyake, Kazuhiro Kobayashi, Keiichi Murayama
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Patent number: 6825821Abstract: The present invention is directed to provide a driving circuit and driving method for a LCD having high performance of moving image displaying within few amount of memory and downscaled circuit. In the present invention, a voltage applied to a pixel to drive liquid crystal material in the pixel is determined as a voltage with which the transparency of the pixel at the end of the current field becomes the designated transparency. To determine the voltage, a data table for quick response in which output data is stored in correspondence with some of the possible value of a preceding field image data and some of the possible value of the current field image data is employed, and the output data corresponding to the preceding field image data and the current field image data is determined by the data table through linear interpolation. The voltage corresponding to the output data is applied to the pixel.Type: GrantFiled: July 26, 2001Date of Patent: November 30, 2004Assignees: Mitsubishi Denki Kabushiki Kaisha, Advanced Display Inc.Inventors: Kyoichiro Oda, Akimasa Yuuki, Shin Tahata, Toshio Tobita, Shiro Miyake, Kazuhiro Kobayashi, Keiichi Murayama
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Patent number: 6816142Abstract: A liquid crystal display device comprising a signal correcting means for correcting a level of an original image signal to a level with which transmittance in a steady state of the pixel with the original image signal is attained within one frame period, a horizontal driving means for applying a voltage in correspondence with the corrected image signal to liquid crystal, and an illumination device for illuminating the display panel with a plurality of light emitting regions thereof, said light emitting regions sequentially turns on and off in synchronization with the application of the corrected image signal while holding a definite time delay thereto.Type: GrantFiled: November 13, 2001Date of Patent: November 9, 2004Assignees: Mitsubishi Denki Kabushiki Kaisha, Advanced Display Inc.Inventors: Kyoichiro Oda, Akimasa Yuuki, Shin Tahata, Toshio Tobita, Shiro Miyake, Kazuhiro Kobayashi, Keiichi Murayama
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Publication number: 20030231158Abstract: A coding circuit codes present image data of a pixel which is received as raster data and a delay circuit stores a coded image data for one frame period and outputs one-frame preceding image data of the pixel in accordance with an input of the coded image data. First and second decoder circuits decode coded image data and one-frame preceding coded image data, respectively, a variation-amount calculation circuit calculates variation-amount data of both decoded image date, and an one-frame preceding image reproduction circuit reproduces one-frame preceding reproduced image data. An image date correction circuit generates corrected present image data on the basis of the present image data and the one-frame preceding reproduced image data.Type: ApplicationFiled: June 13, 2003Publication date: December 18, 2003Inventors: Jun Someya, Noritaka Okuda, Masaki Yamakawa, Kyoichiro Oda
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Patent number: 6636283Abstract: A compact and light weight front light, a reflective liquid crystal display device, and a personal digital assistant providing an image display of uniform brightness with high efficiency are provided. The front light includes a main optical guide plate and a second optical guide plate. The second optical guide plate is arranged at an end of the main optical guide plate along the widthwise direction, and, on an end surface opposite an end surface facing the main optical guide plate, grooves forming prisms are aligned along the longitudinal direction, extending in the depth direction. The front light further includes a point light source arranged at an end, in the longitudinal direction, of the second optical guide plate, and a reflective film covering the surfaces of the grooves.Type: GrantFiled: March 29, 2001Date of Patent: October 21, 2003Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Tomohiro Sasagawa, Kyoichiro Oda, Akimasa Yuuki, Naoto Sugawara, Masahiro Yokoi, Masahisa Moroda
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Patent number: 6454452Abstract: A backlight provides uniform emanating light for a liquid crystal display. In the backlight, light emitted from a light source is incident on a receiving end surface of a light guide plate and emanates through a top surface toward a liquid crystal panel. A bottom surface includes a reflecting hollow wedge extending along the receiving end surface and varying in depth, as measured from the bottom surface, in correspondence with distance from the end surface. A dividing flat portion orthogonal to the reflecting hollow wedge divides the reflecting hollowed portion, and an output surface includes a prism having parallel ridges extending in a direction orthogonal to the receiving end surface.Type: GrantFiled: October 20, 2000Date of Patent: September 24, 2002Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Tomohiro Sasagawa, Akimasa Yuuki, Naoko Iwasaki, Sadayuki Matsumoto, Mitsuo Inoue, Kyoichiro Oda
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Publication number: 20020057241Abstract: A liquid crystal display device comprising a signal correcting means for correcting a level of an original image signal to a level with which transmittance in a steady state of the pixel with the original image signal is attained within one frame period, a horizontal driving means for applying a voltage in correspondence with the corrected image signal to liquid crystal, and an illumination device for illuminating the display panel with a plurality of light emitting regions thereof, said light emitting regions sequentially turns on and off in synchronization with the application of the corrected image signal while holding a definite time delay thereto.Type: ApplicationFiled: November 13, 2001Publication date: May 16, 2002Applicant: Mitsubishi Denki Kabushiki KaishaInventors: Kyoichiro Oda, Akimasa Yuuki, Shin Tahata, Toshio Tobita, Shiro Miyake, Kazuhiro Kobayashi, Keiichi Murayama
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Publication number: 20020050965Abstract: The present invention is directed to provide a driving circuit and driving method for a LCD having high performance of moving image displaying within few amount of memory and downscaled circuit. In the present invention, a voltage applied to a pixel to drive liquid crystal material in the pixel is determined as a voltage with which the transparency of the pixel at the end of the current field becomes the designated transparency. To determine the voltage, a data table for quick response in which output data is stored in correspondence with some of the possible value of a preceding field image data and some of the possible value of the current field image data is employed, and the output data corresponding to the preceding field image data and the current field image data is determined by the data table through linear interpolation. The voltage corresponding to the output data is applied to the pixel.Type: ApplicationFiled: July 26, 2001Publication date: May 2, 2002Applicant: MITSUBISHI DENKI KABUSHIKI KAISHAInventors: Kyoichiro Oda, Akimasa Yuuki, Shin Tahata, Toshio Tobita, Shiro Miyake, Kazuhiro Kobayashi, Keiichi Murayama
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Publication number: 20010035927Abstract: A compact and light weight front light, a reflective liquid crystal display device and a personal digital assistant providing image display of uniform brightness with high efficiency are provided. The front light includes a main optical guide plate and a second optical guide plate. The second optical guide plate is arranged at an end portion of the main optical guide plate along the widthwise direction, and on an end surface opposite to an end surface facing the main optical guide plate, a plurality of prism- shaped grooves are formed along the longitudinal direction, extending in the depth direction. The front light further includes a point light source arranged at an end in the longitudinal direction of the second optical guide plate, and a reflective film covering the surface of the prism-shaped grooves.Type: ApplicationFiled: March 29, 2001Publication date: November 1, 2001Inventors: Tomohiro Sasagawa, Kyoichiro Oda, Akimasa Yuuki, Naoto Sugawara, Masahiro Yokoi, Masahisa Moroda
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Patent number: 6215537Abstract: A liquid crystal display includes: a scattering-polarizer provided between a liquid crystal and a back light for transmitting a polarization component in one direction of light from back light, but scattering and reflecting a polarization component in a direction which is orthogonal thereto: and a scattered light reflector reflecting the reflected and scattered light toward scattering-polarizer along with the polarization component in above mentioned one direction. Thus, a liquid crystal display which is inexpensive and has high display quality with reduced power consumption is obtained.Type: GrantFiled: April 8, 1999Date of Patent: April 10, 2001Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Akira Tsumura, Fumio Matsukawa, Kyoichiro Oda, Shuji Iwata
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Patent number: 6211933Abstract: A reflective type liquid crystal display providing brighter display than a conventional device and usable in a dark place is provided. The reflective type liquid crystal display includes liquid crystal and a scattering-polarizer as a main optical element which transmits a polarized light component in one direction to the backside of the liquid crystal and reflects with scattering a polarized light component orthogonal to that one direction in the opposite direction to the advancing direction of the light.Type: GrantFiled: January 26, 1999Date of Patent: April 3, 2001Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Masaya Mizunuma, Akira Tsumura, Kyoichiro Oda
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Patent number: 6181399Abstract: A reflective type liquid crystal display, which permits brighter display than conventional devices, can be used in a dark place and has a simple structure, is provided. The reflective type liquid crystal display includes a polarizer provided in the front of liquid crystal, and a backside-scattering-polarizer provided in the backside of the liquid crystal to transmit a polarized light component in one direction and reflect with scattering a polarized light component orthogonal to that one direction opposite to the advancing direction of the light.Type: GrantFiled: January 26, 1999Date of Patent: January 30, 2001Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Yuzo Odoi, Akira Tsumura, Kyoichiro Oda, Fumio Matsukawa