Patents by Inventor Masaaki Hanai
Masaaki Hanai 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: 9341886Abstract: An image display device includes a liquid crystal panel section, a light source section divided into a plurality of regions, a light detection section detecting the light intensity of the light source section, and a timing generation section. The timing generation section generates a light emission drive signal which turns on each of the regions of the light source section according to scanning in the liquid crystal panel section, and which turns on all the regions of the light source section in a light detection period, and generates a light detection gate signal allowing the detection of the light detection section to be effective in the light detection period.Type: GrantFiled: May 6, 2013Date of Patent: May 17, 2016Assignee: MITSUBISHI ELECTRIC CORPORATIONInventors: Noritaka Okuda, Masaaki Hanai, Hironobu Yasui, Hideki Yoshii
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Patent number: 9164287Abstract: A stereoscopic image display device includes a liquid crystal panel section, a light source section, a light detection section, a light source control section, a shutter glasses section, and a timing generation section generating a light emission drive signal, a light detection gate signal, and shutter switching signals in synchronization with an image synchronization signal. The timing generation section, generates the light emission drive signal which causes each of the regions of the light source section to emit light in accordance with scanning performed in the liquid crystal panel section, and which causes all the regions of the light source section to emit light in a predetermined period, and generates the light detection gate signal which enables detection of the light detection section in the predetermined period, and generates the shutter switching signals for switching left and right shutters to a non-transmissive mode.Type: GrantFiled: May 3, 2013Date of Patent: October 20, 2015Assignee: Mitsubishi Electric CorporationInventors: Hironobu Yasui, Masaaki Hanai, Hideki Yoshii
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Patent number: 9053672Abstract: A light source portion includes a plurality of back lights provided corresponding to respective regions obtained by virtually dividing a liquid crystal panel screen into a plurality of parts, the back lights have a light emission intensity controlled based on a light emission intensity value and have ON and OFF operations controlled in response to a light emission driving signal, and the light emission driving signal is constituted to sequentially turn ON the plurality of back lights synchronously with a stereoscopic image signal and to turn ON the plurality of back lights at the same time in a predetermined timing, and is constituted to individually control a light emission period for the plurality of back lights based on image information about the stereoscopic image signal.Type: GrantFiled: April 29, 2013Date of Patent: June 9, 2015Assignee: MITSUBISHI ELECTRIC CORPORATIONInventors: Hironobu Yasui, Masaaki Hanai, Hideki Yoshii
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Publication number: 20130314457Abstract: A light source portion includes a plurality of back lights provided corresponding to respective regions obtained by virtually dividing a liquid crystal panel screen into a plurality of parts, the back lights have a light emission intensity controlled based on a light emission intensity value and have ON and OFF operations controlled in response to a light emission driving signal, and the light emission driving signal is constituted to sequentially turn ON the plurality of back lights synchronously with a stereoscopic image signal and to turn ON the plurality of back lights at the same time in a predetermined timing, and is constituted to individually control a light emission period for the plurality of back lights based on image information about the stereoscopic image signal.Type: ApplicationFiled: April 29, 2013Publication date: November 28, 2013Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Hironobu YASUI, Masaaki HANAI, Hideki YOSHII
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Publication number: 20130314629Abstract: A stereoscopic image display device includes a liquid crystal panel section, a light source section, a light detection section, a light source control section, a shutter glasses section, and a timing generation section generating a light emission drive signal, a light detection gate signal, and shutter switching signals in synchronization with an image synchronization signal. The timing generation section, generates the light emission drive signal which causes each of the regions of the light source section to emit light in accordance with scanning performed in the liquid crystal panel section, and which causes all the regions of the light source section to emit light in a predetermined period, and generates the light detection gate signal which enables detection of the light detection section in the predetermined period, and generates the shutter switching signals for switching left and right shutters to a non-transmissive mode.Type: ApplicationFiled: May 3, 2013Publication date: November 28, 2013Applicant: Mitsubishi Electric CorporationInventors: Hironobu YASUI, Masaaki HANAI, Hideki YOSHII
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Publication number: 20130314641Abstract: An image display device includes a liquid crystal panel section, a light source section divided into a plurality of regions, a light detection section detecting the light intensity of the light source section, and a timing generation section. The timing generation section generates a light emission drive signal which turns on each of the regions of the light source section according to scanning in the liquid crystal panel section, and which turns on all the regions of the light source section in a light detection period, and generates a light detection gate signal allowing the detection of the light detection section to be effective in the light detection period.Type: ApplicationFiled: May 6, 2013Publication date: November 28, 2013Applicant: Mitsubishi Electric CorporationInventors: Noritaka OKUDA, Masaaki HANAI, Hironobu YASUI, Hideki YOSHII
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Patent number: 6693676Abstract: A motion detecting apparatus for detecting the motion of the picture without error and realizing the motion YC separation or the motion adaptive scan-line interpolation with high accuracy is realized by correcting the motion amount of the pixel which is too much or too small in comparison with the peripheral pixels for the signal obtained by subtracting the output of the vertical edge detecting circuit for detecting the slow motion of the picture signal in the vertical direction from the combined outputs from the first detecting circuit for detecting motion information of the luminance signal low-pass component and from the second detecting circuit for detecting motion information of the color signal in the picture signal, and then adding the output of the horizontal edge detecting circuit for detecting the slow motion of the picture signal in the horizontal direction.Type: GrantFiled: April 11, 2001Date of Patent: February 17, 2004Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Noriyuki Yamaguchi, Masaaki Hanai, Akira Okumura
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Publication number: 20020008785Abstract: A motion detecting apparatus for detecting the motion of the picture without error and realizing the motion YC separation or the motion adaptive scan-line interpolation with high accuracy is realized by correcting the motion amount of the pixel which is too much or too small in comparison with the peripheral pixels for the signal obtained by subtracting the output of the vertical edge detecting circuit for detecting the slow motion of the picture signal in the vertical direction from the combined outputs from the first detecting circuit for detecting motion information of the luminance signal low-pass component and from the second detecting circuit for detecting motion information of the color signal in the picture signal, and then adding the output of the horizontal edge detecting circuit for detecting the slow motion of the picture signal in the horizontal direction.Type: ApplicationFiled: April 11, 2001Publication date: January 24, 2002Inventors: Noriyuki Yamaguchi, Masaaki Hanai, Akira Okumura
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Patent number: 6081302Abstract: An image quality correction circuit having a variable gain amplifier for amplifying an extracted high-frequency component of a luminance signal in such a manner that the gain thereof is increased when detected color density is high, and is reduced when the detected color density is low, and a slice circuit for slicing the outputted amplitude of the variable gain amplifier at a prescribed value, wherein a corrected luminance signal is obtained by combining an image quality correction signal outputted from the slice circuit with the luminance signal to be corrected.Type: GrantFiled: March 31, 1999Date of Patent: June 27, 2000Assignee: Mitsubishi Denki Kabushiki KaishaInventor: Masaaki Hanai
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Patent number: 6023304Abstract: An image quality correction circuit having a variable gain amplifier for amplifying an extracted high-frequency component of a luminance signal in such a manner that the gain thereof is increased when detected color density is high, and is reduced when the detected color density is low, and a slice circuit for slicing the outputted amplitude of the variable gain amplifier at a prescribed value, wherein a corrected luminance signal is obtained by combining an image quality correction signal outputted from the slice circuit with the luminance signal to be corrected.Type: GrantFiled: March 31, 1999Date of Patent: February 8, 2000Assignee: Mitsubishi Denki Kabushiki KaishaInventor: Masaaki Hanai
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Patent number: 6018373Abstract: An image quality correction circuit having a variable gain amplifier for amplifying an extracted high-frequency component of a luminance signal in such a manner that the gain thereof is increased when detected color density is high, and is reduced when the detected color density is low, and a slice circuit for slicing the outputted amplitude of the variable gain amplifier at a prescribed value, wherein a corrected luminance signal is obtained by combining an image quality correction signal outputted from the slice circuit with the luminance signal to be corrected.Type: GrantFiled: March 31, 1999Date of Patent: January 25, 2000Assignee: Mitsubishi Denki Kabushiki KaishaInventor: Masaaki Hanai
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Patent number: 6002448Abstract: An image quality correction circuit having a variable gain amplifier for amplifying an extracted high-frequency component of a luminance signal in such a manner that the gain thereof is increased when detected color density is high, and is reduced when the detected color density is low, and a slice circuit for slicing the outputted amplitude of the variable gain amplifier at a prescribed value, wherein a corrected luminance signal is obtained by combining an image quality correction signal outputted from the slice circuit with the luminance signal to be corrected.Type: GrantFiled: March 31, 1999Date of Patent: December 14, 1999Assignee: Mitsubishi Denki Kabushiki KaishaInventor: Masaaki Hanai
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Patent number: 5912715Abstract: A method and apparatus for enhancing an edge in an image edge by controlling the electron beam scanning speed. A primary differential signal is delayed and the delayed and non-delayed signals are fed into a maximum value detection circuit and a minimum value detection circuit. A signal output by the maximum value detection signal, from which a positive alternating current component is removed, and a signal output by the minimum value detection circuit, from which a negative alternating current component is removed, are added together and synthesized. The resultant signal is passed through an amplifier circuit and then across a speed modulation coil of a cathode ray tube.Type: GrantFiled: June 14, 1996Date of Patent: June 15, 1999Assignee: Mitsubishi Denki Kabushiki KaishaInventor: Masaaki Hanai
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Patent number: 5910823Abstract: An image quality correction circuit having a variable gain amplifier for amplifying an extracted high-frequency component of a luminance signal in such a mariner that the gain thereof is increased when detected color density is high, and is reduced when the detected color density is low, and a slice circuit for slicing the outputted amplitude of the variable gain amplifier at a prescribed value, wherein a corrected luminance signal is obtained by combining an image quality correction signal outputted from the slice circuit with the luminance signal to be corrected.Type: GrantFiled: January 31, 1997Date of Patent: June 8, 1999Assignee: Mitsubishi Denki Kabushiki KaishaInventor: Masaaki Hanai
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Patent number: 5663769Abstract: An image quality correction circuit having a variable gain amplifier for amplifying an extracted high-frequency component of a luminance signal in such a manner that the gain thereof is increased when detected color density is high, and is reduced when the detected color density is low, and a slice circuit for slicing the outputted amplitude of the variable gain amplifier at a prescribed value, wherein a corrected luminance signal is obtained by combining an image quality correction signal outputted from the slice circuit with the luminance signal to be corrected.Type: GrantFiled: May 20, 1996Date of Patent: September 2, 1997Assignee: Mitsubishi Denki Kabushiki KaishaInventor: Masaaki Hanai
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Patent number: 5621480Abstract: An image quality correction circuit having a variable gain amplifier for amplifying an extracted high-frequency component of a luminance signal in such a manner that the gain thereof is increased when detected color density is high, and is reduced when the detected color density is low, and a slice circuit for slicing the outputted amplitude of the variable gain amplifier at a prescribed value, wherein a corrected luminance signal is obtained by combining an image quality correction signal outputted from the slice circuit with the luminance signal to be corrected.Type: GrantFiled: April 12, 1994Date of Patent: April 15, 1997Assignee: Mitsubishi Denki Kabushiki KaishaInventor: Masaaki Hanai