Patents by Inventor Haruki Takata

Haruki Takata 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: 8111263
    Abstract: A video display device that allows the color temperature of the signals in white color attributes having high luminance and low chroma saturation to be corrected with high precision is provided with a color temperature correction method so as to visually obtain a desirable white color on display. In some embodiments, the signal processing circuit can include an A/D converter to convert video signals into digitalized signals, a matrix circuit to convert the digitalized signals into luminance signals and at least two color difference signals, a hue conversion circuit to obtain hue signals from the color difference signals, a hue correction circuit to correct hue signals, a chroma saturation conversion circuit to obtain chroma saturation signals from color difference signals, a chroma saturation correction circuit to correct chroma saturation signals and a color temperature correction circuit to perform the color temperature correction on the respective hue and chroma saturation signals.
    Type: Grant
    Filed: March 17, 2009
    Date of Patent: February 7, 2012
    Assignee: Hitachi, Ltd.
    Inventors: Katsunobu Kimura, Takaaki Matono, Haruki Takata, Takeshi Sakai, Wataru Kato
  • Patent number: 7982804
    Abstract: Image quality adjustment of an inputted image signal is performed with higher accuracy to display a more preferable image to the user. An attribute information determining unit obtains first attribute information indicating the format of the inputted image signal and second attribute information indicating transmission characteristics of the image signal. An image quality adjustment value calculating unit calculates optimal image quality adjustment values for the image signal from the obtained first and second attribute information. An image processing unit adjusts the image quality of the image signal based on the optimal image quality adjustment values and then outputs the image to an image display. The second attribute information includes the bit rate, resolution, and frame rate of the image signal.
    Type: Grant
    Filed: November 28, 2006
    Date of Patent: July 19, 2011
    Assignee: Hitachi, Ltd.
    Inventors: Takehiro Uzawa, Masato Oshikiri, Haruki Takata, Hidenori Takata
  • Patent number: 7920773
    Abstract: The present invention provides a video reproducing device which provides a function of reproducing a still image file and a moving image file recorded onto a recording medium in plural formats so that a user can easily identify a matched statuses of the files in the video reproducing device and can select and operate a target file as well as a control method therefor. The present invention displays an index screen in which thumbnails of a still image file and a moving image file in plural formats read from a recording medium are arrayed and further displays icons for clarifying a match relation between the video reproducing device and the files.
    Type: Grant
    Filed: July 10, 2006
    Date of Patent: April 5, 2011
    Assignee: Hitachi, Ltd.
    Inventors: Masato Oshikiri, Haruki Takata, Akira Kitazume, Takehiro Uzawa
  • Patent number: 7916214
    Abstract: A picture display technique carries out an adjustment of image quality of an inputted picture signal in response to a type of the inputted picture signal, e.g., a type of a first picture signal into which a second picture signal, having fewer scanning lines than that of the first picture signal, is converted, and an original type of the first picture signal, and then displays a picture of an adjusted picture signal on a display device. Further, the adjustment of the picture quality may include at least one of hue correction of the inputted picture signal in a certain hue range and chroma correction of the inputted picture signal in a certain chroma range. The adjustment of the picture quality may also include a contour correction of the inputted picture signal.
    Type: Grant
    Filed: June 1, 2006
    Date of Patent: March 29, 2011
    Assignee: Hitachi, Ltd.
    Inventors: Katsunobu Kimura, Mitsuo Nakajima, Yoshiaki Mizuhashi, Haruki Takata, Masaaki Matsukawa
  • Publication number: 20100091186
    Abstract: A flame rate is up-converted two times by an STB (Set-Top Box) and a display apparatus which have a frame rate conversion function respectively. Thereby, the flame rate is converted to approximately ā€œnā€ times higher frame rate which is a driving frequency of a display device used in a display apparatus. The display apparatus and the STB respectively have an image quality correcting circuit and an OSD (On-Screen Display) circuit which are selected to be used and displayed according to the display apparatus connected. In such configurations, the STB can be commonly utilized with respect to various sorts of display apparatuses having a liquid crystal display panel, a PDP (Plasma Display Panel), and other types of display panels.
    Type: Application
    Filed: October 8, 2009
    Publication date: April 15, 2010
    Applicant: Hitachi Consumer Electronics Co., Ltd.
    Inventor: Haruki TAKATA
  • Publication number: 20090244107
    Abstract: A video display device that allows the color temperature of the signals in white color attributes having high luminance and low chroma saturation to be corrected with high precision is provided with a color temperature correction method so as to visually obtain a desirable white color on display. In some embodiments, the signal processing circuit can include an A/D converter to convert video signals into digitalized signals, a matrix circuit to convert the digitalized signals into luminance signals and at least two color difference signals, a hue conversion circuit to obtain hue signals from the color difference signals, a hue correction circuit to correct hue signals, a chroma saturation conversion circuit to obtain chroma saturation signals from color difference signals, a chroma saturation correction circuit to correct chroma saturation signals and a color temperature correction circuit to perform the color temperature correction on the respective hue and chroma saturation signals.
    Type: Application
    Filed: March 17, 2009
    Publication date: October 1, 2009
    Applicant: Hitachi, Ltd.
    Inventors: Katsunobu Kimura, Takaaki Matono, Haruki Takata, Takeshi Sakai, Wataru Kato
  • Patent number: 7450182
    Abstract: An image display apparatus is provided for receiving a digital image signal and displaying it so that high-quality images can be displayed with the noise reduced not to be conspicuous and with the contour appropriately corrected. The image display apparatus includes an input unit to which the digital image signal is applied, an information detection/separation circuit which detects and separates frame encoding information and bit rate information from the digital image signal, a picture quality correcting unit which makes contour correction/noise reduction process on the digital image signal, and a control circuit. The control circuit controls the picture-quality correcting unit to make the above process by using the frame encoding information and bit rate information from the information detection/separation circuit.
    Type: Grant
    Filed: February 18, 2005
    Date of Patent: November 11, 2008
    Assignee: Hitachi, Ltd.
    Inventors: Mitsuo Nakajima, Yoshiaki Mizuhashi, Haruki Takata
  • Patent number: 7436415
    Abstract: The present invention provides a technology for using an STB in conjunction with various display panels that comprise different types of display devices. The present invention comprises a display panel (2), which includes a memory section (255) and a transmitter section (210). The memory section (255) stores identification information (ID information), which includes the information about the type of a device constituting the display panel (2) and/or the specifications for the display panel. The transmitter section (210) transmits the ID information stored in the memory section (255) to a signal processing apparatus (1).
    Type: Grant
    Filed: July 20, 2004
    Date of Patent: October 14, 2008
    Assignee: Hitachi, Ltd.
    Inventors: Haruki Takata, Hiroshi Aoki, Ryo Hasegawa, Fumio Sogabe, Misako Nakagawa
  • Patent number: 7382414
    Abstract: A video signal processing apparatus includes a characteristic detection circuit for detecting luminance distribution corresponding to one frame of a video signal, a contrast compensation circuit for compensating contrast of the video signal, an edge compensation circuit for compensating an edge portion of the video signal, and a control circuit for determining a luminance range to be controlled on the basis of the luminance distribution detected by the characteristic detection circuit, and controlling the contrast compensation circuit and edge compensation circuit to conduct predetermined compensation on the video signal belonging to the luminance range. The control circuit controls the contrast compensation circuit to increase contrast for the video signal in the luminance range as compared with the video signal in other regions, and controls the edge compensation circuit to make an edge compensation quantity for the video signal in the luminance range smaller as compared with other regions.
    Type: Grant
    Filed: November 29, 2004
    Date of Patent: June 3, 2008
    Assignee: Hitachi, Ltd.
    Inventors: Mitsuo Nakajima, Yasutaka Tsuru, Takaaki Matono, Haruki Takata
  • Patent number: 7333081
    Abstract: An object of the present invention is to provide an image display technology with which high contrast can be stably obtained. In order to achieve the above object, the present invention changes the gain of a digital luminance signal by feeding back information on maximum and average luminance levels of the luminance signal, adjusts image contrast, and in accordance with the average luminance level detected from the feedback system, controls the illuminance of the backlight applied to a display unit. The control increases the illuminance of the backlight when the detected average luminance level is higher than the upper-limit value of a previously set reference range, and reduces the illuminance when the detected average luminance level is lower than the lower-limit value of the reference range.
    Type: Grant
    Filed: July 20, 2004
    Date of Patent: February 19, 2008
    Inventors: Hiroshi Aoki, Ryo Hasegawa, Hirofumi Sakamoto, Haruki Takata, Yasutaka Tsuru
  • Publication number: 20070120864
    Abstract: Image quality adjustment of an inputted image signal is performed with higher accuracy to display a more preferable image to the user. An attribute information determining unit obtains first attribute information indicating the format of the inputted image signal and second attribute information indicating transmission characteristics of the image signal. An image quality adjustment value calculating unit calculates optimal image quality adjustment values for the image signal from the obtained first and second attribute information. An image processing unit adjusts the image quality of the image signal based on the optimal image quality adjustment values and then outputs the image to an image display. The second attribute information includes the bit rate, resolution, and frame rate of the image signal.
    Type: Application
    Filed: November 28, 2006
    Publication date: May 31, 2007
    Inventors: Takehiro Uzawa, Masato Oshikiri, Haruki Takata, Hidenori Takata
  • Publication number: 20070031115
    Abstract: The present invention provides a video reproducing device which provides a function of reproducing a still image file and a moving image file recorded onto a recording medium in plural formats so that a user can easily identify a matched statuses of the files in the video reproducing device and can select and operate a target file as well as a control method therefor. The present invention displays an index screen in which thumbnails of a still image file and a moving image file in plural formats read from a recording medium are arrayed and further displays icons for clarifying a match relation between the video reproducing device and the files.
    Type: Application
    Filed: July 10, 2006
    Publication date: February 8, 2007
    Inventors: Masato Oshikiri, Haruki Takata, Akira Kitazume, Takehiro Uzawa
  • Publication number: 20060274204
    Abstract: A picture display technique carries out an adjustment of image quality of an inputted picture signal in response to a type of the inputted picture signal, e.g., a type of a first picture signal into which a second picture signal, having fewer scanning lines than that of the first picture signal, is converted, and an original type of the first picture signal, and then displays a picture of an adjusted picture signal on a display device. Further, the adjustment of the picture quality may include at least one of hue correction of the inputted picture signal in a certain hue range and chroma correction of the inputted picture signal in a certain chroma range. The adjustment of the picture quality may also include a contour correction of the inputted picture signal.
    Type: Application
    Filed: June 1, 2006
    Publication date: December 7, 2006
    Inventors: Katsunobu Kimura, Mitsuo Nakajima, Yoshiaki Mizuhashi, Haruki Takata, Masaaki Matsukawa
  • Patent number: 7084880
    Abstract: A video display apparatus comprises a color temperature correction circuit which controls temperature color of an input video signal; a display device which displays an image upon basis of said video signal corrected by said color temperature correction circuit; and a signal producing circuit which obtains a hue signal from said input video signal. The color temperature correction circuit controls said hue signal corresponding to the video signal of white color attributes, which has luminance equal to or greater than a predetermined value and chroma saturation equal to or less than a predetermined value, whereby achieving the color temperature correction.
    Type: Grant
    Filed: March 7, 2002
    Date of Patent: August 1, 2006
    Assignee: Hitachi, Ltd.
    Inventors: Katsunobu Kimura, Takaaki Matono, Haruki Takata, Takeshi Sakai, Wataru Kato
  • Publication number: 20060098743
    Abstract: An image display apparatus is provided for receiving a digital image signal and displaying it so that high-quality images can be displayed with the noise reduced not to be conspicuous and with the contour appropriately corrected. The image display apparatus includes an input unit to which the digital image signal is applied, an information detection/separation circuit which detects and separates frame encoding information and bit rate information from the digital image signal, a picture quality correcting unit which makes contour correction/noise reduction process on the digital image signal, and a control circuit. The control circuit controls the picture-quality correcting unit to make the above process by using the frame encoding information and bit rate information from the information detection/separation circuit.
    Type: Application
    Filed: February 18, 2005
    Publication date: May 11, 2006
    Inventors: Mitsuo Nakajima, Yoshiaki Mizuhashi, Haruki Takata
  • Publication number: 20050253825
    Abstract: A video display apparatus includes a brightness modulating circuit that reduces the image brightness of the peripheral area of a display panel as compared to that of the central area of the display panel, and a control circuit that controls the operation of the brightness modulating circuit on the basis of the power consumption of the display panel in which the control circuit controls the brightness modulating circuit to be active when the power consumption of the display panel exceeds a predetermined threshold, and stops the operation of the brightness modulating circuit when it is smaller than the predetermined threshold.
    Type: Application
    Filed: October 14, 2004
    Publication date: November 17, 2005
    Inventors: Tomoyuki Kawamura, Shuichi Yano, Hidenao Kubota, Haruki Takata
  • Publication number: 20050248688
    Abstract: A video display device that allows the color temperature of the signals in white color attributes having high luminance and low chroma saturation to be corrected with high precision is provided together with the color temperature correction method for the same so as to visually obtain a desirable white color on display.
    Type: Application
    Filed: July 7, 2005
    Publication date: November 10, 2005
    Applicant: Hitachi, Ltd.
    Inventors: Katsunobu Kimura, Takaaki Matono, Haruki Takata, Takeshi Sakai, Wataru Kato
  • Publication number: 20050219420
    Abstract: A video display device that allows the color temperature of the signals in white color attributes having high luminance and low chroma saturation to be corrected with high precision is provided together with the color temperature correction method for the same so as to visually obtain a desirable white color on display.
    Type: Application
    Filed: January 19, 2005
    Publication date: October 6, 2005
    Applicant: Hitachi, Ltd.
    Inventors: Katsunobu Kimura, Takaaki Matono, Haruki Takata, Takeshi Sakai, Wataru Kato
  • Publication number: 20050128358
    Abstract: A video signal processing apparatus includes a characteristic detection circuit for detecting luminance distribution corresponding to one frame of a video signal, a contrast compensation circuit for compensating contrast of the video signal, an edge compensation circuit for compensating an edge portion of the video signal, and a control circuit for determining a luminance range to be controlled on the basis of the luminance distribution detected by the characteristic detection circuit, and controlling the contrast compensation circuit and edge compensation circuit to conduct predetermined compensation on the video signal belonging to the luminance range. The control circuit controls the contrast compensation circuit to increase contrast for the video signal in the luminance range as compared with the video signal in other regions, and controls the edge compensation circuit to make an edge compensation quantity for the video signal in the luminance range smaller as compared with other regions.
    Type: Application
    Filed: November 29, 2004
    Publication date: June 16, 2005
    Inventors: Mitsuo Nakajima, Yasutaka Tsuru, Takaaki Matono, Haruki Takata
  • Publication number: 20050057486
    Abstract: An object of the present invention is to provide an image display technology with which high contrast can be stably obtained. In order to achieve the above object, the present invention changes the gain of a digital luminance signal by feeding back information on maximum and average luminance levels of the luminance signal, adjusts image contrast, and in accordance with the average luminance level detected from the feedback system, controls the illuminance of the backlight applied to a display unit. The control increases the illuminance of the backlight when the detected average luminance level is higher than the upper-limit value of a previously set reference range, and reduces the illuminance when the detected average luminance level is lower than the lower-limit value of the reference range.
    Type: Application
    Filed: July 20, 2004
    Publication date: March 17, 2005
    Inventors: Hiroshi Aoki, Ryo Hasegawa, Hirofumi Sakamoto, Haruki Takata, Yasutaka Tsuru