Patents by Inventor Kazuki Homma
Kazuki Homma 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: 9583030Abstract: A display drive circuit of the invention has: an initial-color-gamut-apex-coordinate-storing unit capable of storing initial color gamut apex coordinates; a user-target-color-gamut-apex-coordinate-storing unit capable of storing user target color gamut apex coordinates; a saturation-expansion-coefficient-deciding unit for deciding expansion coefficients of saturation data based on the initial and user target color gamut apex coordinates; and an expansion unit for expanding saturations of display data based on the saturation expansion coefficients. The expansion coefficients of saturation data are decided based on the initial and user target color gamut apex coordinates, and saturations of display data are expanded according to the expansion coefficients. Thus, the degree of expanding the saturations can be controlled for each color gamut or each of R, G and B color properties of an LC display panel.Type: GrantFiled: December 23, 2013Date of Patent: February 28, 2017Assignee: SYNAPTICS JAPAN GKInventors: Yoshiki Kurokawa, Yasuyuki Kudo, Hiroyuki Nitta, Kazuki Homma, Junya Takeda
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Publication number: 20140104302Abstract: A display drive circuit of the invention has: an initial-color-gamut-apex-coordinate-storing unit capable of storing initial color gamut apex coordinates; a user-target-color-gamut-apex-coordinate-storing unit capable of storing user target color gamut apex coordinates; a saturation-expansion-coefficient-deciding unit for deciding expansion coefficients of saturation data based on the initial and user target color gamut apex coordinates; and an expansion unit for expanding saturations of display data based on the saturation expansion coefficients. The expansion coefficients of saturation data are decided based on the initial and user target color gamut apex coordinates, and saturations of display data are expanded according to the expansion coefficients. Thus, the degree of expanding the saturations can be controlled for each color gamut or each of R, G and B color properties of an LC display panel.Type: ApplicationFiled: December 23, 2013Publication date: April 17, 2014Applicant: Renesas Electronics CorporationInventors: Yoshiki Kurokawa, Yasuyuki Kudo, Hiroyuki Nitta, Kazuki Homma, Junya Takeda
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Patent number: 8633951Abstract: A display drive circuit of the invention has: an initial-color-gamut-apex-coordinate-storing unit capable of storing initial color gamut apex coordinates; a user-target-color-gamut-apex-coordinate-storing unit capable of storing user target color gamut apex coordinates; a saturation-expansion-coefficient-deciding unit for deciding expansion coefficients of saturation data based on the initial and user target color gamut apex coordinates; and an expansion unit for expanding saturations of display data based on the saturation expansion coefficients. The expansion coefficients of saturation data are decided based on the initial and user target color gamut apex coordinates, and saturations of display data are expanded according to the expansion coefficients. Thus, the degree of expanding the saturations can be controlled for each color gamut or each of R, G and B color properties of an LC display panel.Type: GrantFiled: November 26, 2012Date of Patent: January 21, 2014Assignee: Renesas Electronics CorporationInventors: Yoshiki Kurokawa, Yasuyuki Kudo, Hiroyuki Nitta, Kazuki Homma, Junya Takeda
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Publication number: 20130076806Abstract: A display drive circuit of the invention has: an initial-color-gamut-apex-coordinate-storing unit capable of storing initial color gamut apex coordinates; a user-target-color-gamut-apex-coordinate-storing unit capable of storing user target color gamut apex coordinates; a saturation-expansion-coefficient-deciding unit for deciding expansion coefficients of saturation data based on the initial and user target color gamut apex coordinates; and an expansion unit for expanding saturations of display data based on the saturation expansion coefficients. The expansion coefficients of saturation data are decided based on the initial and user target color gamut apex coordinates, and saturations of display data are expanded according to the expansion coefficients. Thus, the degree of expanding the saturations can be controlled for each color gamut or each of R, G and B color properties of an LC display panel.Type: ApplicationFiled: November 26, 2012Publication date: March 28, 2013Applicant: RENESAS ELECTRONICS CORPORATIONInventors: Yoshiki Kurokawa, Yasuyuki Kudo, Hiroyuki Nitta, Kazuki Homma, Junya Takeda
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Patent number: 8345072Abstract: A display drive circuit of the invention has: an initial-color-gamut-apex-coordinate-storing unit capable of storing initial color gamut apex coordinates; a user-target-color-gamut-apex-coordinate-storing unit capable of storing user target color gamut apex coordinates; a saturation-expansion-coefficient-deciding unit for deciding expansion coefficients of saturation data based on the initial and user target color gamut apex coordinates; and an expansion unit for expanding saturations of display data based on the saturation expansion coefficients. The expansion coefficients of saturation data are decided based on the initial and user target color gamut apex coordinates, and saturations of display data are expanded according to the expansion coefficients. Thus, the degree of expanding the saturations can be controlled for each color gamut or each of R, G and B color properties of an LC display panel.Type: GrantFiled: March 19, 2012Date of Patent: January 1, 2013Assignee: Renesas Electronics CorporationInventors: Yoshiki Kurokawa, Yasuyuki Kudo, Hiroyuki Nitta, Kazuki Homma, Junya Takeda
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Publication number: 20120176400Abstract: A display drive circuit of the invention has: an initial-color-gamut-apex-coordinate-storing unit capable of storing initial color gamut apex coordinates; a user-target-color-gamut-apex-coordinate-storing unit capable of storing user target color gamut apex coordinates; a saturation-expansion-coefficient-deciding unit for deciding expansion coefficients of saturation data based on the initial and user target color gamut apex coordinates; and an expansion unit for expanding saturations of display data based on the saturation expansion coefficients. The expansion coefficients of saturation data are decided based on the initial and user target color gamut apex coordinates, and saturations of display data are expanded according to the expansion coefficients. Thus, the degree of expanding the saturations can be controlled for each color gamut or each of R, G and B color properties of an LC display panel.Type: ApplicationFiled: March 19, 2012Publication date: July 12, 2012Applicant: RENESAS ELECTRONICS CORPORATIONInventors: Yoshiki Kurokawa, Yasuyuki Kudo, Hiroyuki Nitta, Kazuki Homma, Junya Takeda
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Patent number: 8154560Abstract: A display drive circuit of the invention has: an initial-color-gamut-apex-coordinate-storing unit capable of storing initial color gamut apex coordinates; a user-target-color-gamut-apex-coordinate-storing unit capable of storing user target color gamut apex coordinates; a saturation-expansion-coefficient-deciding unit for deciding expansion coefficients of saturation data based on the initial and user target color gamut apex coordinates; and an expansion unit for expanding saturations of display data based on the saturation expansion coefficients. The expansion coefficients of saturation data are decided based on the initial and user target color gamut apex coordinates, and saturations of display data are expanded according to the expansion coefficients. Thus, the degree of expanding the saturations can be controlled for each color gamut or each of R, G and B color properties of an LC display panel.Type: GrantFiled: May 19, 2009Date of Patent: April 10, 2012Assignee: Renesas Electronics CorporationInventors: Yoshiki Kurokawa, Yasuyuki Kudo, Hiroyuki Nitta, Kazuki Homma, Junya Takeda
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Publication number: 20100079479Abstract: A display drive circuit of the invention has: an initial-color-gamut-apex-coordinate-storing unit capable of storing initial color gamut apex coordinates; a user-target-color-gamut-apex-coordinate-storing unit capable of storing user target color gamut apex coordinates; a saturation-expansion-coefficient-deciding unit for deciding expansion coefficients of saturation data based on the initial and user target color gamut apex coordinates; and an expansion unit for expanding saturations of display data based on the saturation expansion coefficients. The expansion coefficients of saturation data are decided based on the initial and user target color gamut apex coordinates, and saturations of display data are expanded according to the expansion coefficients. Thus, the degree of expanding the saturations can be controlled for each color gamut or each of R, G and B color properties of an LC display panel.Type: ApplicationFiled: May 19, 2009Publication date: April 1, 2010Applicant: RENESAS TECHNOLOGY CORP.Inventors: Yoshiki KUROKAWA, Yasuyuki KUDO, Hiroyuki NITTA, Kazuki HOMMA, Junya TAKEDA
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Publication number: 20090303264Abstract: A liquid crystal driving device includes a liquid crystal controller and specific color expansion circuits. The liquid crystal controller generates a liquid crystal drive signal to be supplied to a liquid crystal display panel in response to display data. The specific color expansion circuits generate an image output signal from a low-intensity image input signal corresponding to a specific color by intensifying a gradation using a specified factor. The specific color expansion circuits generate an image output signal from a high-intensity image input signal corresponding to a specific color by intensifying a gradation using another small factor. The image output signal is appropriately intensified by the specific color expansion circuits and is supplied as display data to the liquid crystal controller.Type: ApplicationFiled: May 22, 2009Publication date: December 10, 2009Applicant: RENESAS TECHNOLOGY CORP.Inventors: Goki TOSHIMA, Yasuyuki KUDO, Yoshiki KUROKAWA, Akihito AKAI, Kazuki HOMMA
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Publication number: 20090289965Abstract: A liquid crystal driving device is provided, which can reduce the problem of contrast lowering of the liquid crystal display screen due to the decrease of the driving current of LED, by the control which is performed in order to cope with the decrease of the maximum rated current of LED as a light source of the backlight at a high temperature. The liquid crystal driving device includes a liquid crystal driving circuit, a backlight control unit, and display data expansion circuits. The liquid crystal driving circuit generates a liquid crystal driving signal to be supplied to a liquid crystal display panel in response to display data. The backlight control unit reduces driving current of the light emitting diode as a light source of the backlight module to illuminate the liquid crystal display panel, in response to the temperature rise of the liquid crystal display panel.Type: ApplicationFiled: May 18, 2009Publication date: November 26, 2009Applicant: RENESAS TECHNOLOGY CORP.Inventors: Yoshiki KUROKAWA, Yukari KATAYAMA, Yasuyuki KUDO, Akihito AKAI, Hiroyuki NITTA, Kazuki HOMMA