Patents by Inventor Takaaki Matono
Takaaki Matono 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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Patent number: 8111263Abstract: 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: GrantFiled: March 17, 2009Date of Patent: February 7, 2012Assignee: Hitachi, Ltd.Inventors: Katsunobu Kimura, Takaaki Matono, Haruki Takata, Takeshi Sakai, Wataru Kato
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Patent number: 7907134Abstract: With the aim of offering a video display technique by which stable and high contrast video images are reproduced, contrast adjusting circuitry is constructed. The contrast adjusting circuitry detects a maximum picture level (MPL) and an average picture level (APL) of analog -to-dialog converted luminance signals for a predetermined period, determines one of the predefined luminance regions within which the MPL falls and one of the predefined luminance regions within which the APL falls, and, based on the thus determined luminance regions of both MPL and APL, carries out a contrast adjustment of video images by changing the gain of luminance signals and color depth correction by changing the gain of color signals.Type: GrantFiled: April 22, 2009Date of Patent: March 15, 2011Assignee: Hitachi, Ltd.Inventors: Hiroshi Aoki, Ryo Hasegawa, Takaaki Matono
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Patent number: 7876553Abstract: According to the present invention, the amount of usage of a heat conductive member for fixing a self-luminous flat display panel to a metallic chassis member disposed at the back of the display panel is reduced in the thickness direction as well as in the surface direction. The invention further provides a technique for efficiently radiating heat from the display panel, suppressing cost increase. To this end, in the invention, the heat conductive member is a hot-melt adhesive having adhesion at room temperature and filled with a heat conduction imparting agent, and the display panel is fixed to the chassis member by a plurality of heat conducting sections of the heat conductive member formed discretely ranging from 0.3 to 0.8 mm in thickness.Type: GrantFiled: December 19, 2006Date of Patent: January 25, 2011Assignee: Hitachi, Ltd.Inventors: Mitsuo Okimoto, Mikio Shiraishi, Takaaki Matono, Yoshie Kodera, Toshihiko Matsuzawa, Sadayuki Nishimura, Nobuo Masuoka
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Patent number: 7760213Abstract: With the aim of offering a video display technique by which stable and high contrast video images are reproduced, contrast adjusting circuitry is constructed. The contrast adjusting circuitry detects a maximum picture level (MPL) and an average picture level (APL) of luminance signals for a predetermined period, determines one of the predefined luminance regions within which the MPL falls and one of the predefined luminance regions within which the APL falls, and, based on the thus determined luminance regions of both MPL and APL, carries out a contrast adjustment of video images by changing the gain of luminance signals and color depth correction by changing the gain of color signals.Type: GrantFiled: April 22, 2009Date of Patent: July 20, 2010Assignee: Hitachi, Ltd.Inventors: Hiroshi Aoki, Ryo Hasegawa, Takaaki Matono
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Publication number: 20100110286Abstract: A display apparatus includes a receiving unit, which is configured to receive video data, caption data, and program information data, a first on-screen unit, which is configured to display a caption, upon a basis of a second on-screen unit, which is configured to display program information, a format converting unit, and a display unit. When a video on which a caption is displayed is displayed by the display unit, a picture format of a caption is converted by the format converting unit in accordance with conversion of a picture format of a video, and when a video on which program information is displayed by the display unit, a picture format of a program information is not converted.Type: ApplicationFiled: December 29, 2009Publication date: May 6, 2010Inventors: Masuo Oku, Hironori Komi, Keisuke Inata, Ryosuke Toya, Kenji Katsumata, Shigeru Komatsu, Shinobu Torikoshi, Takaaki Matono, Fumihito Tanaka, Masaaki Hisanaga
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Patent number: 7701475Abstract: With the aim of offering a video display technique by which stable and high contrast video images are reproduced, contrast adjusting circuitry is constructed. The contrast adjusting circuitry detects a maximum picture level (MPL) and an average picture level (APL) of luminance signals for a predetermined period, determines one of the predefined luminance regions within which the MPL falls and one of the predefined luminance regions within which the APL falls, and, based on the thus determined luminance regions of both MPL and APL, carries out a contrast adjustment of video images by changing the gain of luminance signals and color depth correction by changing the gain of color signals.Type: GrantFiled: January 22, 2007Date of Patent: April 20, 2010Assignee: Hitachi, Ltd.Inventors: Hiroshi Aoki, Ryo Hasegawa, Takaaki Matono
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Patent number: 7643089Abstract: A decoder apparatus which includes a de-multiplexer, which is configured to divide motion picture data from a transport stream, a video decoder, which is configured to decode the divided motion picture data, and a first re-formatter on-screen unit, which is configured to display motion picture data and at least one of first and second graphic data on a screen. The first re-formatter on-screen unit converts motion picture data of a first aspect ratio, which is decoded by the video decoder, and first graphics data, which is produced by applying information relating to a caption corresponding to the motion picture data, into a second aspect ratio, when outputting the motion picture data of the first aspect ratio after conversion into the second aspect ratio, without converting the aspect ratio of second graphic data, which is produced by applying information relating to a program guide.Type: GrantFiled: May 14, 2008Date of Patent: January 5, 2010Assignees: Hitachi, Ltd., Hitachi ULSI Systems Co., Ltd.Inventors: Masuo Oku, Hironori Komi, Keisuke Inata, Ryosuke Toya, Kenji Katsumata, Shigeru Komatsu, Shinobu Torikoshi, Takaaki Matono, Fumihito Tanaka, Masaaki Hisanaga
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Publication number: 20090262259Abstract: With the aim of offering a video display technique by which stable and high contrast video images are reproduced, contrast adjusting circuitry is constructed. The contrast adjusting circuitry detects a maximum picture level (MPL) and an average picture level (APL) of analog-to-digital converted luminance signals for a predetermined period, determines one of the predefined luminance regions within which the MPL falls and one of the predefined luminance regions within which the APL falls, and, based on the thus determined luminance regions of both MPL and APL, carries out a contrast adjustment of video images by changing the gain of luminance signals and color depth correction by changing the gain of color signals.Type: ApplicationFiled: April 22, 2009Publication date: October 22, 2009Applicant: Hitachi, LtdInventors: Hiroshi AOKI, Ryo Hasegawa, Takaaki Matono
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Publication number: 20090262245Abstract: With the aim of offering a video display technique by which stable and high contrast video images are reproduced, contrast adjusting circuitry is constructed. The contrast adjusting circuitry detects a maximum picture level (MPL) and an average picture level (APL) of analog-to-digital converted luminance signals for a predetermined period, determines one of the predefined luminance regions within which the MPL falls and one of the predefined luminance regions within which the APL falls, and, based on the thus determined luminance regions of both MPL and APL, carries out a contrast adjustment of video images by changing the gain of luminance signals and color depth correction by changing the gain of color signals.Type: ApplicationFiled: April 22, 2009Publication date: October 22, 2009Applicant: Hitachi, Ltd.Inventors: Hiroshi Aoki, Ryo Hasegawa, Takaaki Matono
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Publication number: 20090244107Abstract: 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: ApplicationFiled: March 17, 2009Publication date: October 1, 2009Applicant: Hitachi, Ltd.Inventors: Katsunobu Kimura, Takaaki Matono, Haruki Takata, Takeshi Sakai, Wataru Kato
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Publication number: 20080218628Abstract: A decoder apparatus which includes a de-multiplexer, which is configured to divide motion picture data from a transport stream, a video decoder, which is configured to decode the divided motion picture data, and a first re-formatter on-screen unit, which is configured to display motion picture data and at least one of first and second graphic data on a screen. The first re-formatter on-screen unit converts motion picture data of a first aspect ratio, which is decoded by the video decoder, and first graphics data, which is produced by applying information relating to a caption corresponding to the motion picture data, into a second aspect ratio, when outputting the motion picture data of the first aspect ratio after conversion into the second aspect ratio, without converting the aspect ratio of second graphic data, which is produced by applying information relating to a program guide.Type: ApplicationFiled: May 14, 2008Publication date: September 11, 2008Inventors: Masuo Oku, Hironori Komi, Keisuke Inata, Ryosuke Toya, Kenji Katsumata, Shigeru Komatsu, Shinobu Torikoshi, Takaaki Matono, Fumihito Tanaka, Masaaki Hisanaga
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Patent number: 7382414Abstract: 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: GrantFiled: November 29, 2004Date of Patent: June 3, 2008Assignee: Hitachi, Ltd.Inventors: Mitsuo Nakajima, Yasutaka Tsuru, Takaaki Matono, Haruki Takata
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Patent number: 7375761Abstract: A receiver includes a motion picture data decoder which decodes motion picture data to obtain decoded motion picture data, a memory which stores the decoded motion picture data, a video processing unit which mixes the decoded motion picture data with first graphics data and converts the motion picture data to obtain first on-screen data mixed and first format-converted motion picture data, and a second on-screen data multiplexer which mixes the decoded motion picture data with second graphics data to obtain second on-screen data-mixed motion picture data. A first output device outputs the first on-screen data mixed and first format-converted motion picture data, a second output device outputs the second on-screen data mixed motion picture data.Type: GrantFiled: January 22, 2004Date of Patent: May 20, 2008Assignees: Hitachi, Ltd., Hitachi ULSI Systems Co., Ltd.Inventors: Masuo Oku, Hironori Komi, Keisuke Inata, Ryosuke Toya, Kenji Katsumata, Shigeru Komatsu, Shinobu Torikoshi, Takaaki Matono, Fumihito Tanaka, Masaaki Hisanaga
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Publication number: 20070153458Abstract: According to the present invention, the amount of usage of a heat conductive member for fixing a self-luminous flat display panel to a metallic chassis member disposed at the back of the display panel is reduced in the thickness direction as well as in the surface direction. The invention further provides a technique for efficiently radiating heat from the display panel, suppressing cost increase. To this end, in the invention, the heat conductive member is a hot-melt adhesive having adhesion at room temperature and filled with a heat conduction imparting agent, and the display panel is fixed to the chassis member by a plurality of heat conducting sections of the heat conductive member formed discretely ranging from 0.3 to 0.8 mm in thickness.Type: ApplicationFiled: December 19, 2006Publication date: July 5, 2007Inventors: Mitsuo Okimoto, Mikio Shiraishi, Takaaki Matono, Yoshie Kodera, Toshihiko Matsuzawa, Sadayuki Nishimura, Nobuo Masuoka
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Patent number: 7227543Abstract: With the aim of offering a video display technique by which stable and high contrast video images are reproduced, contrast adjusting circuitry is constructed. The contrast adjusting circuitry detects a maximum picture level (MPL) and an average picture level (APL) of analog-to-digital converted luminance signals for a predetermined period, determines one of the predefined luminance regions within which the MPL falls and one of the predefined luminance regions within which the APL falls, and, based on the thus determined luminance regions of both MPL and APL, carries out a contrast adjustment of video images by changing the gain of luminance signals and color depth correction by changing the gain of color signals.Type: GrantFiled: October 27, 2005Date of Patent: June 5, 2007Assignee: Hitachi, Ltd.Inventors: Hiroshi Aoki, Ryo Hasegawa, Takaaki Matono
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Publication number: 20070115303Abstract: With the aim of offering a video display technique by which stable and high contrast video images are reproduced, contrast adjusting circuitry is constructed. The contrast adjusting circuitry detects a maximum picture level (MPL) and an average picture level (APL) of analog-to-digital converted luminance signals for a predetermined period, determines one of the predefined luminance regions within which the MPL falls and one of the predefined luminance regions within which the APL falls, and, based on the thus determined luminance regions of both MPL and APL, carries out a contrast adjustment of video images by changing the gain of luminance signals and color depth correction by changing the gain of color signals.Type: ApplicationFiled: January 22, 2007Publication date: May 24, 2007Applicant: Hitachi, Ltd.Inventors: Hiroshi Aoki, Ryo Hasegawa, Takaaki Matono
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Patent number: 7151535Abstract: With the aim of offering a video display technique by which stable and high contrast video images are reproduced, contrast adjusting circuitry is constructed. The contrast adjusting circuitry detects a maximum picture level (MPL) and an average picture level (APL) of analog-to-digital converted luminance signals for a predetermined period, determines one of the predefined luminance regions within which the MPL falls and one of the predefined luminance regions within which the APL falls, and, based on the thus determined luminance regions of both MPL and APL, carries out a contrast adjustment of video images by changing the gain of luminance signals and color depth correction by changing the gain of color signals.Type: GrantFiled: April 11, 2005Date of Patent: December 19, 2006Assignee: Hitachi, Ltd.Inventors: Hiroshi Aoki, Ryo Hasegawa, Takaaki Matono
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Publication number: 20060221001Abstract: A display unit converts the image signal having the converted frame rate into an interlacing scanning format when the scanning frequency of a progressive image signal having the converted frame rate is higher than a predetermined value. The predetermined value corresponds to the maximum operation frequency of a display device or a drive circuit that drives the display device.Type: ApplicationFiled: February 2, 2006Publication date: October 5, 2006Inventors: Takaaki Matono, Mutsumi Suzuki, Toshimitsu Watanabe, Fumio Haruna, Katsumi Ashizawa
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Patent number: 7084880Abstract: 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: GrantFiled: March 7, 2002Date of Patent: August 1, 2006Assignee: Hitachi, Ltd.Inventors: Katsunobu Kimura, Takaaki Matono, Haruki Takata, Takeshi Sakai, Wataru Kato
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Publication number: 20060092115Abstract: The invention intends to realize long lifetime of electron-emitter elements and a display apparatus by preferably eliminating charges accumulated in the electron-emitter elements. The display apparatus of the invention has: a non-display period extending circuit for extending a non-display period of an input video signal to a period longer than the non-display period of the input video image and outputting the extended signal; a plurality of electron-emitter elements for emitting electrons on the basis of the video signal outputted from the non-display period extending circuit; and a scan driver having a pulse applying circuit for applying a pulse signal to the electron-emitter elements in the non-display period of the video signal extended by the non-display period extending circuit. A pulse width of the pulse signal is set to be longer in accordance with the extended non-display period.Type: ApplicationFiled: August 26, 2005Publication date: May 4, 2006Applicant: Hitachi, Ltd.Inventors: Takaaki Matono, Mutsumi Suzuki, Toshimitsu Watanabe, Katsumi Ashizawa