Patents by Inventor Kohzoh Takahashi
Kohzoh Takahashi 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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Publication number: 20230305175Abstract: An X-ray image capturing apparatus includes a photoelectric conversion element, a TFT, a gate drive circuit, a control circuit, and a filter section. The TFT is connected to the photoelectric conversion element. The gate drive circuit supplies a gate signal to a gate electrode of the TFT. The control circuit supplies a control signal to the gate drive circuit. The filter section attenuates a component of the gate signal or the control signal that has a frequency lower than a prescribed frequency.Type: ApplicationFiled: March 23, 2023Publication date: September 28, 2023Inventor: Kohzoh TAKAHASHI
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Patent number: 11754728Abstract: An X-ray imaging apparatus includes an X-ray source, an X-ray imaging panel, and a controller. The controller includes an image processing unit that generates an inspection image in accordance with a data signal read from a thin-film transistor with the thin-film transistor supplied with a gate signal, a detection control unit that detects a dark-spot pixel from the inspection image, and a threshold correction unit that applies, to a gate of the thin-film transistor corresponding to the dark-spot pixel, a positive shift voltage that raises a gate-off threshold voltage of the thin-film transistor.Type: GrantFiled: June 2, 2022Date of Patent: September 12, 2023Assignee: SHARP DISPLAY TECHNOLOGY CORPORATIONInventors: Kohzoh Takahashi, Akinori Kubota
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Publication number: 20220390626Abstract: An X-ray imaging apparatus includes an X-ray source, an X-ray imaging panel, and a controller. The controller includes an image processing unit that generates an inspection image in accordance with a data signal read from a thin-film transistor with the thin-film transistor supplied with a gate signal, a detection control unit that detects a dark-spot pixel from the inspection image, and a threshold correction unit that applies, to a gate of the thin-film transistor corresponding to the dark-spot pixel, a positive shift voltage that raises a gate-off threshold voltage of the thin-film transistor.Type: ApplicationFiled: June 2, 2022Publication date: December 8, 2022Inventors: Kohzoh TAKAHASHI, Akinori KUBOTA
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Publication number: 20200243592Abstract: An active matrix substrate includes a plurality of gate lines, a plurality of data lines, a first terminal group having a plurality of terminals connected to first ends of the plurality of gate lines, and a second terminal group having a plurality of terminals connected to first ends of the plurality of data lines. The active matrix substrate further includes a plurality of inspection terminals disposed dispersedly between the plurality of terminals in the terminal group as at least one of the first terminal group and the second terminal group.Type: ApplicationFiled: January 29, 2020Publication date: July 30, 2020Inventor: KOHZOH TAKAHASHI
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Patent number: 9633617Abstract: According to a liquid crystal display device (1), a gate driver is controlled to (a) scan all of scan signal lines during at least two driving frames contained in a first driving period and (b) not scan any of the scan signal lines during pausing frames in a pausing period which is (i) secured between the first driving period and a second driving period by which the first driving period is followed and (ii) is longer than each of the first and second driving periods.Type: GrantFiled: July 2, 2012Date of Patent: April 25, 2017Assignee: Sharp Kabushiki KaishaInventors: Jun Nakata, Akizumi Fujioka, Kohzoh Takahashi, Toshihiro Yanagi, Masami Ozaki
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Patent number: 9412324Abstract: A drive device of the present invention includes a VCOM selection circuit (122) for switching, before a display panel (102) is turned off, an electric potential of a counter electrode COM of each of pixels P from a VCOM1 to a VCOM2 which causes an electric potential of a drain electrode of each of the pixel P to be identical to the electric potential of the counter electrode COM after the display panel (102) is turned off.Type: GrantFiled: February 21, 2013Date of Patent: August 9, 2016Assignee: Sharp Kabushiki KaishaInventors: Fumiyuki Kobayashi, Asahi Yamato, Kohzoh Takahashi, Taketoshi Nakano, Toshihiro Yanagi
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Patent number: 9311872Abstract: A display device (1) includes (i) refresh rate changing means (15) for changing a refresh rate of a display panel (2) and (ii) a polarity reversal controlling section (20) for changing, in accordance with a change in the refresh rate, at least one of a temporal cycle and a spatial cycle of a polarity reversal of a source signal.Type: GrantFiled: August 7, 2012Date of Patent: April 12, 2016Assignee: SHARP KABUSHIKI KAISHAInventors: Kohzoh Takahashi, Kohji Saitoh, Akizumi Fujioka, Jun Nakata, Toshihiro Yanagi
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Patent number: 9183789Abstract: Provided is a display device capable of properly controlling a luminance of a backlight on the basis of a plurality of factors. The display device is a display device (10) which includes a BL luminance control signal generating block (44) for generating a BL luminance control signal for controlling a luminance of a backlight unit (30). The BL luminance control signal generating block (44) (i) receives a plurality of BL luminance parameters regarding the luminance of the backlight unit (30), (ii) carries out a calculation process with respect to the plurality of BL luminance parameters and (iii) generates the BL luminance control signal on the basis of a result of the calculation process.Type: GrantFiled: April 3, 2012Date of Patent: November 10, 2015Assignee: Sharp Kabushiki KaishaInventors: Kohzoh Takahashi, Asahi Yamato, Taketoshi Nakano, Toshihiro Yanagi
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Patent number: 9183797Abstract: Disclosed is a display device that (i) converts an input image formed of R, G, and B into a converted image formed of R, G, B, and W to display the converted image and that (ii) compresses the luminance of an input image for the subsequent frame on the basis of an adjustment value C which is corrected in correspondence with the number of, among all pixels in a converted image for the current frame, pixels in a state of luminance saturation and that then converts the input image into a converted image, the display device including a luminance oscillation detecting section (10) for detecting, while input images identical to each other are being inputted each as the above input image, whether converted images corresponding to the respective input images have an oscillating luminance, the display device, in the case where the luminance oscillation detecting section (10) has detected that the converted images have an oscillating luminance, stopping correction of the adjustment value C to fix the adjustment value CType: GrantFiled: April 9, 2012Date of Patent: November 10, 2015Assignee: Sharp Kabushiki KaishaInventors: Kohzoh Takahashi, Taketoshi Nakano, Asahi Yamato, Ken Inada, Fumiyuki Kobayashi, Toshihiro Yanagi
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Patent number: 9165525Abstract: In an intermittent drive mode of a display device in which driving and pausing of the driving are repeated, an image identification section identifies an input image as a still image or a moving image. In a case where the moving image is identified, a drive/pause control section generates a drive/pause control signal with a period ratio in accordance with the moving image. A timing control section generates a driver control signal so that intermittent driving is carried out. Then, a source driver and a gate driver drives a display section so that the drive period and the pause period are repeated with a predetermined period ratio, so that the input image is displayed. The drive/pause control section sets a time ratio between the drive period and the pause period to be variable for each of the moving image and the still image.Type: GrantFiled: April 4, 2012Date of Patent: October 20, 2015Assignee: Sharp Kabushiki KaishaInventors: Fumiyuki Kobayashi, Taketoshi Nakano, Asahi Yamato, Kohji Saitoh, Ken Inada, Kohzoh Takahashi, Toshihiro Yanagi
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Publication number: 20150161948Abstract: Provided is a display device capable of properly controlling a luminance of a backlight on the basis of a plurality of factors. The display device is a display device (10) which includes a BL luminance control signal generating block (44) for generating a BL luminance control signal for controlling a luminance of a backlight unit (30). The BL luminance control signal generating block (44) (i) receives a plurality of BL luminance parameters regarding the luminance of the backlight unit (30), (ii) carries out a calculation process with respect to the plurality of BL luminance parameters and (iii) generates the BL luminance control signal on the basis of a result of the calculation process.Type: ApplicationFiled: April 3, 2012Publication date: June 11, 2015Applicant: SHARP KABUSHIKI KAISHAInventors: Kohzoh Takahashi, Asahi Yamato, Taketoshi Nakano, Toshihiro Yanagi
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Patent number: 9024861Abstract: A display device of the present invention includes (i) a BL control parameter calculating section (224) for calculating a BL control parameter on the basis of an input image, (ii) a BL luminance control signal generating block (230) for generating a BL luminance control signal on the basis of the BL control parameter and (iii) an output section (225) for supplying, to the BL luminance control signal generating block (230), a BL control parameter that has been calculated by the BL control parameter calculating section (224) immediately before a suspension time period during which a display controlling section is being suspended.Type: GrantFiled: April 9, 2012Date of Patent: May 5, 2015Assignee: Sharp Kabushiki KaishaInventors: Kohzoh Takahashi, Toshihiro Yanagi, Taketoshi Nakano, Asahi Yamato
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Patent number: 8970645Abstract: A display device includes: a timing controller (10) for driving a scanning line driving circuit (4) and a signal line driving circuit (6) by providing a scanning period (T1) and a pause period (T2) which follows the scanning period (T1); a data analyzing section (101) for obtaining detection data on an external light intensity; and a BL luminance setting section (104) for outputting, at least during the pause period (T2), a BL control signal for adjusting, in accordance with the detection data obtained by the data analyzing section (101), a luminance of light to be emitted to a screen.Type: GrantFiled: July 10, 2014Date of Patent: March 3, 2015Assignee: Sharp Kabushiki KaishaInventors: Kohzoh Takahashi, Kohji Saitoh, Asahi Yamato, Taketoshi Nakano, Toshihiro Yanagi, Akizumi Fujioka, Jun Nakata
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Publication number: 20150015555Abstract: A drive device of the present invention includes a VCOM selection circuit (122) for switching, before a display panel (102) is turned off, an electric potential of a counter electrode COM of each of pixels P from a VCOM1 to a VCOM2 which causes an electric potential of a drain electrode of each of the pixel P to be identical to the electric potential of the counter electrode COM after the display panel (102) is turned off.Type: ApplicationFiled: February 21, 2013Publication date: January 15, 2015Inventors: Fumiyuki Kobayashi, Asahi Yamato, Kohzoh Takahashi, Taketoshi Nakano, Toshihiro Yanagi
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Publication number: 20140320554Abstract: A display device includes: a timing controller (10) for driving a scanning line driving circuit (4) and a signal line driving circuit (6) by providing a scanning period (T1) and a pause period (T2) which follows the scanning period (T1); a data analyzing section (101) for obtaining detection data on an external light intensity; and a BL luminance setting section (104) for outputting, at least during the pause period (T2), a BL control signal for adjusting, in accordance with the detection data obtained by the data analyzing section (101), a luminance of light to be emitted to a screen.Type: ApplicationFiled: July 10, 2014Publication date: October 30, 2014Inventors: Kohzoh TAKAHASHI, Kohji SAITOH, Asahi YAMATO, Taketoshi NAKANO, Toshihiro YANAGI, Akizumi FUJIOKA, Jun NAKATA
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Patent number: 8810615Abstract: A display device includes: a timing controller (10) for driving a scanning line driving circuit (4) and a signal line driving circuit (6) by providing a scanning period (T1) and a pause period (T2) which follows the scanning period (T1); a data analyzing section (101) for obtaining detection data on an external light intensity; and a BL luminance setting section (104) for outputting, at least during the pause period (T2), a BL control signal for adjusting, in accordance with the detection data obtained by the data analyzing section (101), a luminance of light to be emitted to a screen.Type: GrantFiled: April 3, 2012Date of Patent: August 19, 2014Assignee: Sharp Kabushiki KaishaInventors: Kohzoh Takahashi, Kohji Saitoh, Asahi Yamato, Taketoshi Nakano, Toshihiro Yanagi, Akizumi Fujioka, Jun Nakata
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Publication number: 20140225881Abstract: A display device (1) includes (i) refresh rate changing means (15) for changing a refresh rate of a display panel (2) and (ii) a polarity reversal controlling section (20) for changing, in accordance with a change in the refresh rate, at least one of a temporal cycle and a spatial cycle of a polarity reversal of a source signal.Type: ApplicationFiled: August 7, 2012Publication date: August 14, 2014Applicant: SHARP KABUSHIKI KAISHAInventors: Kohzoh Takahashi, Kohji Saitoh, Akizumi Fujioka, Jun Nakata, Toshihiro Yanagi
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Patent number: 8723775Abstract: In one embodiment of the present invention, when a still image is displayed, applied voltages respectively corresponding to a total of n (n being an integer of not less than 4) types of gradation 0 to (n?1) are outputted to pixels. When a moving image is displayed, an applied voltage corresponding to a predetermined gradation m (1?m?(n?2)) is applied to the pixels instead of applied voltages respectively corresponding to gradations of less than the predetermined gradation m. Overdrive driving is performed with respect to a total of n types of gradation.Type: GrantFiled: March 13, 2013Date of Patent: May 13, 2014Assignee: Sharp Kabushiki KaishaInventors: Asahi Yamato, Yuki Kawashima, Kiyoshi Nakagawa, Kohzoh Takahashi, Toshihiro Yanagi
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Publication number: 20140125569Abstract: According to a liquid crystal display device (1), a gate driver is controlled to (a) scan all of scan signal lines during at least two driving frames contained in a first driving period and (b) not scan any of the scan signal lines during pausing frames in a pausing period which is (i) secured between the first driving period and a second driving period by which the first driving period is followed and (ii) is longer than each of the first and second driving periods.Type: ApplicationFiled: July 2, 2012Publication date: May 8, 2014Applicant: Sharp Kabushiki KaishaInventors: Jun Nakata, Akizumi Fujioka, Kohzoh Takahashi, Toshihiro Yanagi, Masami Ozaki
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Patent number: 8654157Abstract: Disclosed is an image display device including an image signal input section (2), an overshoot operation section (3) that, when an image signal is inputted from outside one frame at a time, corrects the gradation level of the inputted image signal for a frame, a frame memory (4) that stores the corrected image signal of the frame, and a sub-frame division processing section (5) that time-divides the corrected and stored image signal of the frame into a plurality of sub-frame periods. The overshoot operation section (3) corrects the gradation level of an image signal of a frame according to a relation between the corrected gradation level of the image signal of a frame immediately preceding the frame, which is stored of the frame memory (4), and the gradation level of the image signal of the frame. Thus, the costs can be reduced, the device can be made compact, and the power consumption can be suppressed.Type: GrantFiled: August 11, 2010Date of Patent: February 18, 2014Assignee: Sharp Kabushiki KaishaInventors: Asahi Yamato, Kohzoh Takahashi