Patents by Inventor Shin Tahata

Shin Tahata 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).

  • Patent number: 7903080
    Abstract: In a liquid crystal display, a pixel driving circuit 16 alternately displays a first image and a second image on a liquid crystal panel 11. A front light 12 lights up while the first image is displayed on the liquid crystal panel by the pixel driving circuit 16, and another front light 13 lights up while the second image is displayed on the liquid crystal panel by the pixel driving circuit 16. As a result, the liquid crystal display enables a viewer B to look at the second image different from the first image which it provides for a viewer A.
    Type: Grant
    Filed: February 9, 2005
    Date of Patent: March 8, 2011
    Assignee: Mitsubishi Electric Corporation
    Inventors: Akimasa Yuuki, Kyoichiro Oda, Atsushi Ito, Tetsuya Satake, Shin Tahata
  • Patent number: 7855763
    Abstract: A backlight device includes: a first prism sheet which has a triangular prism row on a major surface thereof; a first light source which emits light having directivity in a slanted direction with respect to a normal line direction of a light outgoing surface of the first prism sheet in opposite side to the triangular prism row side so as to enter into the triangular prism row of the first prism sheet; and a second light source which emits light having directivity in the normal line direction of the light outgoing surface of the first prism sheet so as to enter into the triangular prism row of the first prism sheet.
    Type: Grant
    Filed: February 19, 2008
    Date of Patent: December 21, 2010
    Assignee: Mitsubishi Electric Corporation
    Inventors: Akimasa Yuuki, Kyoichiro Oda, Naoko Iwasaki, Shin Tahata, Toru Kokogawa
  • Publication number: 20080297431
    Abstract: In a liquid crystal display, a pixel driving circuit 16 alternately displays a first image and a second image on a liquid crystal panel 11. A front light 12 lights up while the first image is displayed on the liquid crystal panel by the pixel driving circuit 16, and another front light 13 lights up while the second image is displayed on the liquid crystal panel by the pixel driving circuit 16. As a result, the liquid crystal display enables a viewer B to look at the second image different from the first image which it provides for a viewer A.
    Type: Application
    Filed: February 9, 2005
    Publication date: December 4, 2008
    Applicant: Mitsubishi Electric Corporation
    Inventors: Akimasa Yuuki, Kyoichiro Oda, Atsushi Ito, Tetsuya Satake, Shin Tahata
  • Publication number: 20080198295
    Abstract: A backlight device includes: a first prism sheet which has a triangular prism row on a major surface thereof; a first light source which emits light having directivity in a slanted direction with respect to a normal line direction of a light outgoing surface of the first prism sheet in opposite side to the triangular prism row side so as to enter into the triangular prism row of the first prism sheet; and a second light source which emits light having directivity in the normal line direction of the light outgoing surface of the first prism sheet so as to enter into the triangular prism row of the first prism sheet.
    Type: Application
    Filed: February 19, 2008
    Publication date: August 21, 2008
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Akimasa Yuuki, Kyoichiro Oda, Naoko Iwasaki, Shin Tahata, Toru Kokogawa
  • Patent number: 7397521
    Abstract: A liquid crystal display according to the present invention includes: a liquid crystal cell 10, in which pixels having independently driven reflecting and transmitting members are arranged in a matrix, that is composed of a first substrate 15, a second substrate 17 having pixel driving members, and a liquid crystal 16 sandwiched between the first substrate 15 and the second substrate 17; a first polarizing means 13 disposed facing the first substrate 15; a second polarizing means 19 disposed facing the second substrate 17; a first front light 6 disposed outside the first polarizing means 13; and a second front light 7 disposed outside the second polarizing means 19. Owing to the configuration of the display, images can be displayed on both sides of the liquid crystal display.
    Type: Grant
    Filed: February 12, 2004
    Date of Patent: July 8, 2008
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Akimasa Yuuki, Naoki Nakagawa, Naoko Iwasaki, Shin Tahata, Keiichi Ito, Tomohiro Sasagawa, Takashi Yamamoto
  • Publication number: 20060170844
    Abstract: A liquid crystal display according to the present invention includes: a liquid crystal cell 10, in which pixels having independently driven reflecting and transmitting members are arranged in a matrix, that is composed of a first substrate 15, a second substrate 17 having pixel driving members, and a liquid crystal 16 sandwiched between the first substrate 15 and the second substrate 17; a first polarizing means 13 disposed facing the first substrate 15; a second polarizing means 19 disposed facing the second substrate 17; a first front light 6 disposed outside the first polarizing means 13; and a second front light 7 disposed outside the second polarizing means 19. Owing to the configuration of the display, images can be displayed on both sides of the liquid crystal display.
    Type: Application
    Filed: February 12, 2004
    Publication date: August 3, 2006
    Applicant: MITSUBISHI DENKI KABUSHIKI KAISHA
    Inventors: Akimasa Yuuki, Naoki Nakagawa, Naoko Iwasaki, Shin Tahata, Keiichi Ito, Tomohiro Sasagawa, Takashi Yamamoto
  • Patent number: 7015887
    Abstract: 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: Grant
    Filed: October 22, 2004
    Date of Patent: March 21, 2006
    Assignees: Mitsubishi Denki Kabushiki Kaisha, Advanced Display Inc.
    Inventors: Kyoichiro Oda, Akimasa Yuuki, Shin Tahata, Toshio Tobita, Shiro Miyake, Kazuhiro Kobayashi, Keiichi Murayama
  • Publication number: 20050078081
    Abstract: 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: Application
    Filed: November 5, 2004
    Publication date: April 14, 2005
    Applicants: Mitsubishi Denki Kabushiki Kaisha, Advanced Display Inc.
    Inventors: Kyoichiro Oda, Akimasa Yuuki, Shin Tahata, Toshio Tobita, Shiro Miyake, Kazuhiro Kobayashi, Keiichi Murayama
  • Publication number: 20050052387
    Abstract: 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: Application
    Filed: October 22, 2004
    Publication date: March 10, 2005
    Applicants: MITSUBISHI DENKI KABUSHIKI KAISHA, ADVANCED DISPLAY INC.
    Inventors: Kyoichiro Oda, Akimasa Yuuki, Shin Tahata, Toshio Tobita, Shiro Miyake, Kazuhiro Kobayashi, Keiichi Murayama
  • Patent number: 6825821
    Abstract: 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: Grant
    Filed: July 26, 2001
    Date of Patent: November 30, 2004
    Assignees: Mitsubishi Denki Kabushiki Kaisha, Advanced Display Inc.
    Inventors: Kyoichiro Oda, Akimasa Yuuki, Shin Tahata, Toshio Tobita, Shiro Miyake, Kazuhiro Kobayashi, Keiichi Murayama
  • Patent number: 6816142
    Abstract: 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: Grant
    Filed: November 13, 2001
    Date of Patent: November 9, 2004
    Assignees: Mitsubishi Denki Kabushiki Kaisha, Advanced Display Inc.
    Inventors: Kyoichiro Oda, Akimasa Yuuki, Shin Tahata, Toshio Tobita, Shiro Miyake, Kazuhiro Kobayashi, Keiichi Murayama
  • Publication number: 20020057241
    Abstract: 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: Application
    Filed: November 13, 2001
    Publication date: May 16, 2002
    Applicant: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Kyoichiro Oda, Akimasa Yuuki, Shin Tahata, Toshio Tobita, Shiro Miyake, Kazuhiro Kobayashi, Keiichi Murayama
  • Publication number: 20020050965
    Abstract: 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: Application
    Filed: July 26, 2001
    Publication date: May 2, 2002
    Applicant: MITSUBISHI DENKI KABUSHIKI KAISHA
    Inventors: Kyoichiro Oda, Akimasa Yuuki, Shin Tahata, Toshio Tobita, Shiro Miyake, Kazuhiro Kobayashi, Keiichi Murayama
  • Patent number: 6356329
    Abstract: The present invention discloses a liquid crystal display apparatus including (1) a liquid crystal panel including an electrodes substrate provided with pixel electrodes and counter electrodes, a counter substrate which opposes the electrodes substrate, and a liquid crystal layer containing therein liquid crystal molecules which are driven by an electric field that is generated in a substantially parallel manner with respect to a surface of the electrodes substrate when voltage is applied on the pixel electrodes and counter electrodes; and (2) a driving circuit for supplying predetermined electric signals to the pixel electrodes and the counter electrodes, wherein inclining directions of liquid crystal molecules which are closest to the electrodes substrate and those of liquid crystal molecules which are closest to the counter substrate are identical, and aligning directions of liquid crystal molecules which are closest to the electrodes substrate and those of liquid crystal molecules which are closest to the
    Type: Grant
    Filed: January 27, 1999
    Date of Patent: March 12, 2002
    Assignees: Mitsubishi Denki Kabushiki Kaisha, Advanced Display Inc.
    Inventors: Akira Tamatani, Fumio Matsukawa, Akira Tsumura, Shin Tahata, Masaya Mizunuma, Yasuhiro Morii, Masayuki Fujii, Yasuo Fujita
  • Publication number: 20020008835
    Abstract: A high quality in-plane switching type liquid crystal display device having high contrast ratio and free from any impression of irregular display surface is provided. Spacers which have small surface energy and no influence on orientation of liquid crystal molecules, for example those formed of divinyl benzene coated with a fluorine-coated resin are used, to suppress light passage through and around the spacers in the black (dark) display state. As a result, transmittance in the black (dark) state when the voltage is not applied is reduced to about 0.3% (contrast ratio of about 300) with the maximum transmittance when the voltage is applied being 100%. Irregularity of the display screen caused by the light passage around the spacers is not recognized and excellent display can be obtained.
    Type: Application
    Filed: January 11, 1999
    Publication date: January 24, 2002
    Inventor: SHIN TAHATA
  • Patent number: 6335779
    Abstract: A method of manufacturing an in-plane switching liquid crystal display apparatus which includes forming on a TFT array substrate, a plurality of scanning signal lines, a plurality of image signal lines each crossing the scanning signal lines, thin film transistors at each intersection of the scanning signal lines and image signal lines, liquid crystal driving electrodes opposing the liquid crystal driving electrodes, and common signal lines connected to the common electrodes. Further, the method includes opposing a counter substrate to the TFT array substrate, interposing a plurality of spacers in a gap between the TFT array substrate and the counter substrate, and interposing a sealing agent in the gap between the TFT array substrate and the counter substrate so as to adhere the TFT array substrate and the counter substrate at peripheral portions thereof.
    Type: Grant
    Filed: September 19, 2000
    Date of Patent: January 1, 2002
    Assignees: Mistubishi Denki Kaubshiki Kaisha, Advanced Display Inc.
    Inventors: Yasuhiro Morii, Fumio Matsukawa, Akira Tsumura, Shin Tahata, Masaya Mizunuma, Akira Tamatani, Masayuki Fujii, Yasuo Fujita
  • Patent number: 6166795
    Abstract: A liquid crystal display apparatus of the present invention includes an array substrate, a counter substrate, and liquid crystal that is interposed and held by a space formed by maintaining the array substrate and the counter substrate at a specified interval in a parallel manner, the liquid crystal display apparatus being of in-plane switching in which voltage is impressed on a pair of electrodes disposed on the array substrate to generate an electric field substantially parallel with respect to the array substrate surface and in which liquid crystal is driven through in-plane switching of liquid crystal molecules, wherein the array substrate is formed with a conductive film layer on a surface opposite to the surface on which the pair of electrodes are disposed. Providing a liquid crystal display apparatus with no electric charged being stored on the substrate surface thereof and no afterimages appear.
    Type: Grant
    Filed: January 27, 1999
    Date of Patent: December 26, 2000
    Assignees: Mitsubishi Denki Kabushiki Kaisha, Advanced Display Inc.
    Inventors: Masayuki Fujii, Fumio Matsukawa, Akira Tsumura, Shin Tahata, Masaya Mizunuma, Akira Tamatani, Yasuhiro Morii, Yasuo Fujita
  • Patent number: 6141078
    Abstract: The liquid crystal display apparatus of present invention includes a TFT array substrate on which there are formed scanning signal lines, image signal lines, thin film transistors, liquid crystal driving electrodes, common electrodes and common signal lines, a counter substrate which opposes the TFT array substrate, primary spacers for maintaining a gap between both substrates constant, secondary spacers for maintaining a gap in peripheral portions of both substrates constant, a seal member which is interposed in the gap between both substrates together with the secondary spacers and which adhere peripheral portions of both substrates, and a liquid crystal layer, wherein the in-plane retardation of the display apparatus (.DELTA.n).multidot.(d.sub.max -d.sub.min) is not less than 0 nm and not more than 20 nm, whereby variations in colors occurring in liquid crystal display apparatuses of IPS type which are due to unevenness of liquid crystal layers can be eliminated.
    Type: Grant
    Filed: January 27, 1999
    Date of Patent: October 31, 2000
    Assignees: Mitsubishi Denki Kabushiki Kaisha, Advanced Display, Inc.
    Inventors: Yasuhiro Morii, Fumio Matsukawa, Akira Tsumura, Shin Tahata, Masaya Mizunuma, Akira Tamatani, Masayuki Fujii, Yasuo Fujita
  • Patent number: 5959712
    Abstract: A method of manufacturing a liquid crystal display element including steps of: (a) forming a electrode on a surface of at least one of an upper substrate and a lower substrate; (b) interposing a photocuring sealing material between a peripheral edge of the upper substrate and a peripheral edge of the lower substrate, and irradiating light energy for curing the photocuring sealing material, so that the upper substrate is bonded to the lower substrate in such a manner that a gap is interposed therebetween; and (c) injecting liquid crystal into the gap, wherein the light energy is irradiated while each temperature of the upper substrate and the lower substrate is controlled to 55.degree. C. or lower.
    Type: Grant
    Filed: December 29, 1997
    Date of Patent: September 28, 1999
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Yasuhiro Morii, Akira Tamatani, Akira Tsumura, Shin Tahata, Masaya Mizunuma, Masayuki Fujii
  • Patent number: 5905553
    Abstract: A liquid crystal display composed of an array substrate; a color filter substrate; a liquid crystal material interposed therebetween; a plurality of parallely spaced gate bus lines; a plurality of parallely spaced source bus lines; a plurality of pixel electrodes; a plurality of colored layers; and a light shield portion; wherein at a central portion of the first pixel pattern, gravity center of first pixel portion provided at the central portion of the first pixel pattern corresponds to gravity center of second pixel portion provided at a central portion of the second pixel pattern; and wherein at an end portion of the first pixel pattern, with respect to each viewing angle to each pixel, each second distance between any two adjacent gravity centers of pixels provided in the second pixel pattern is reduced to be shorter by prescribed length than each corresponding first distance between any two adjacent gravity centers of pixels corresponding to gravity centers of pixels provided in the first pixel pattern,
    Type: Grant
    Filed: February 2, 1998
    Date of Patent: May 18, 1999
    Assignees: Mitsubishi Denki Kabushiki Kaisha, Advanced Display Inc.
    Inventors: Fumio Matsukawa, Akira Tsumura, Shin Tahata, Masaya Mizunuma, Akira Tamatani, Yasuhiro Morii, Masayuki Fujii, Yasuo Fujita