Patents by Inventor Hidetaka Mizumaki
Hidetaka Mizumaki 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: 8866716Abstract: The driving circuit of the liquid crystal display device according to the present invention classifies a combination of a displayed gray-scale level of a previous vertical scanning period and a regular gray-scale level corresponding to an input image signal in a current vertical scanning period into either a first group or a second group. The driving circuit is capable of supplying the gray-scale voltage corresponding to the regular gray-scale level for any combination belonging to the first group, and supplying a gray-scale voltage corresponding to an alternative gray-scale level which is different from the regular gray-scale level for any combination belonging to the second group.Type: GrantFiled: July 27, 2005Date of Patent: October 21, 2014Assignee: Sharp Kabushiki KaishaInventors: Hidetaka Mizumaki, Daiichi Sawabe
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Patent number: 8351009Abstract: A display panel is connected to a wiring-mounted board on which a signal supply wiring that supplies wiring supplies signals for driving the display panel is mounted. The wiring-mounted board has (i) first and second wires extending toward the display panel, and (ii) first and second terminals that are connected to the first and second wires, respectively. The display panel has a first short-circuit wire that is connected to the first and second wires at a connecting part of the display panel and the wiring-mounted board, so as to short-circuit the first and second wires.Type: GrantFiled: June 22, 2009Date of Patent: January 8, 2013Assignee: Sharp Kabushiki KaishaInventors: Yasuhiro Wakita, Seiji Muraoka, Hidetaka Mizumaki
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Patent number: 8339345Abstract: In one embodiment of the present invention, a liquid crystal display device is provided with a gray scale conversion section which converts a gray scale conveyed by an input video signal into a gray scale value of a high gray scale region, and then outputs it to the liquid crystal drive device if the gray scale value of the input video signal is of a low gray scale region.Type: GrantFiled: May 29, 2006Date of Patent: December 25, 2012Assignee: Sharp Kabushiki KaishaInventors: Hidetaka Mizumaki, Yasuhiro Wakita
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Publication number: 20120298185Abstract: A light-transmitting solar cell module includes a light-transmitting portion that allows light to pass through from a front surface to a rear surface of a power generation portion. A portion of the light-transmitting portion is covered by an insulating non-transparent member.Type: ApplicationFiled: December 16, 2010Publication date: November 29, 2012Inventors: Kazushi Yamamoto, Hidetaka Mizumaki, Shingo Johgan
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Publication number: 20120038614Abstract: Provided is a liquid crystal driving device including an output circuit (28), a bias control section (29) reducing a bias current of the output circuit (28), and a switching circuit (30) connecting source bus lines provided for respective picture elements which have the same color and are provided in adjacent pixels. Further, the liquid crystal driving device employs at least one of: <1> a structure including a resistor reducing a current running through a switch of the switching circuit (30) when the source bus lines are connected to each other by the switch, the resistor and the switch being connected in series; and <2> a structure including a bias current control terminal capable of externally adjusting a bias control signal supplied to the output circuit (28) by the bias control section (29). This provides a display device driving device capable of reducing a noise generated in an AM band.Type: ApplicationFiled: January 18, 2010Publication date: February 16, 2012Inventor: Hidetaka Mizumaki
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Patent number: 8063919Abstract: A display device includes a display panel for displaying information, and a driving circuit for driving the display panel. The driving circuit of the display device is capable of changing, with a lapse of display time, a displayed color of information which is statically displayed on the display panel.Type: GrantFiled: April 19, 2005Date of Patent: November 22, 2011Assignee: Sharp Kabushiki KaishaInventors: Hidetaka Mizumaki, Makoto Miyago
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Publication number: 20110175800Abstract: An FPC (2) includes: wiring lines (8a) and (8b) which extend toward a display panel (1); and terminals (T1) and (T2) which are connected to the wiring lines (8a) and (8b), respectively. The display panel (1) includes a short-circuit wiring line (5) for short-circuiting the wiring lines (8a) and (8b). The EPC (2) and the display panel (1) are connected to each other so that the wiring lines (8a) and (8b) are short-circuited via the short-circuit wiring line (5) in a connection part between the FPC (2) and the display panel (1). A liquid crystal display device (30) includes a signal application circuit (31) for applying a signal to the terminal (T1) and a monitoring circuit (32) for comparing the signal applied to the terminal (T1) with a signal outputted from the terminal (T2).Type: ApplicationFiled: May 27, 2009Publication date: July 21, 2011Applicant: SHARP KABUSHIKI KAISHAInventor: Hidetaka Mizumaki
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Patent number: 7956838Abstract: A display device includes an illuminator; a display panel for performing displaying by using light which is emitted from the illuminator; and a control circuit for controlling the illuminator. The illuminator includes a plurality of light source blocks, at least one light source belonging to each of the plurality of light source blocks. A displaying region of the display panel has a plurality of regions each performing displaying by using light which is emitted from a respective one of the light source blocks. The control circuit detects a level of a display signal which is input to each of the plurality of regions, and is capable of controlling a luminance of the respective light source block in accordance with the detected level of the display signal.Type: GrantFiled: January 20, 2006Date of Patent: June 7, 2011Assignee: Sharp Kabushiki KaishaInventor: Hidetaka Mizumaki
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Patent number: 7876916Abstract: A card-type sound apparatus has, on a card-shaped substrate, a combination of a sound signal input portion to which a sound signal is input from outside and a sound generation portion that generates sound according to the sound signal input to the sound signal input portion, or a combination of a sound collection portion that collects sound from outside and converts the sound into an electric signal and a sound signal output portion that outputs to outside the electric signal obtained from the sound collection portion, or both of these combinations. The sound generation portion generates sound by making the card-shaped substrate itself vibrate according to the sound signal input to the sound signal input portion. The sound collection portion collects sound by converting the vibration of the card-shaped substrate itself into an electric signal.Type: GrantFiled: June 22, 2007Date of Patent: January 25, 2011Assignee: Sharp Kabushiki KaishaInventors: Kazuhiko Miyata, Hidetaka Mizumaki
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Publication number: 20100321623Abstract: A display panel is connected to a wiring-mounted board on which a signal supply wiring that supplies wiring supplies signals for driving the display panel is mounted. The wiring-mounted board has (i) first and second wires extending toward the display panel, and (ii) first and second terminals that are connected to the first and second wires, respectively. The display panel has a first short-circuit wire that is connected to the first and second wires at a connecting part of the display panel and the wiring-mounted board, so as to short-circuit the first and second wires.Type: ApplicationFiled: June 22, 2009Publication date: December 23, 2010Inventors: Yasuhiro WAKITA, Seiji Muraoka, Hidetaka Mizumaki
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Publication number: 20090251299Abstract: In one embodiment of the present invention, a liquid crystal display device is provided with a gray scale conversion section which converts a gray scale conveyed by an input video signal into a gray scale value of a high gray scale region, and then outputs it to the liquid crystal drive device if the gray scale value of the input video signal is of a low gray scale region.Type: ApplicationFiled: May 29, 2006Publication date: October 8, 2009Inventors: Hidetaka Mizumaki, Yasuhiro Wakita
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Patent number: 7522134Abstract: The display device of the invention includes a display panel including a plurality of pixels arranged in a matrix of rows and columns, and switching elements each being connected to a corresponding one of the plurality of pixels; row driving circuits to for each selecting a row in the plurality of pixels by supplying a selection signal to the switching elements; column driving circuits for each supplying a data signal to pixels connected to the switching elements selected with the selection signal; and a black display signal generation circuit for generating a black display signal for causing the plurality of pixels to perform a black display. The data signal and the black display signal are supplied to each of the plurality of pixels during a period corresponding to one vertical scanning period.Type: GrantFiled: May 17, 2005Date of Patent: April 21, 2009Assignee: Sharp Kabushiki KaishaInventor: Hidetaka Mizumaki
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Patent number: 7519389Abstract: The display system of the present invention includes: a body unit (1) for transmitting image data that has been generated; and a display device (2) for displaying an image in accordance with the image data that has been transmitted from the body unit (1), and said display system is characterized in that the body unit (1) and the display device (2) perform communications via radio communication means, and the body unit (1) and the display device (2) are separately providable. Thus, the radio transmission is used as communication means, and there is no cable, connecting the display device (2) and the body unit (1), that transfers the data signal, so that the device user can operate the system freely while watching the display device (2). As a result, it is possible to improve the workability of the user of the present display system.Type: GrantFiled: December 26, 2007Date of Patent: April 14, 2009Assignee: Sharp Kabushiki KaishaInventors: Hidetaka Mizumaki, Katsuya Mizukata, Yasukuni Yamane
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Patent number: 7499010Abstract: There is provided a data signal line drive circuit which, when displaying a video signal composed of multiple display frames, drives in at least one of the display frames so as to produce a less-than-grayscale-level display frame where a data signal fed to the data signal lines contains a signal less than a grayscale level represented by the video signal. Thus, a data-hold-type display, a driver device for the display, a display method for the display are provided which is capable of preventing display quality degradation due to afterimages observable in moving image displays without reducing screen brightness.Type: GrantFiled: September 10, 2004Date of Patent: March 3, 2009Assignee: Sharp Kabushiki KaishaInventor: Hidetaka Mizumaki
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Publication number: 20090033611Abstract: A display device includes an illuminator; a display panel for performing displaying by using light which is emitted from the illuminator; and a control circuit for controlling the illuminator. The illuminator includes a plurality of light source blocks, at least one light source belonging to each of the plurality of light source blocks. A displaying region of the display panel has a plurality of regions each performing displaying by using light which is emitted from a respective one of the light source blocks. The control circuit detects a level of a display signal which is input to each of the plurality of regions, and is capable of controlling a luminance of the respective light source block in accordance with the detected level of the display signal.Type: ApplicationFiled: January 20, 2006Publication date: February 5, 2009Applicant: SHARP KABUSHIKI KAISHAInventor: Hidetaka Mizumaki
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Publication number: 20090009460Abstract: A display device is for carrying out display by supplying a data signal, that is supplied from a video signal line, to one of a plurality of pixel electrodes via a switching element, and by supplying a scanning signal for controlling ON/OFF state of the switching element to the switching element via a scanning signal line that is orthogonal to the video signal line and is connected to the switching element. When the scanning signal is outputted to the scanning signal line, the scanning signal has a falling waveform that first falls substantially vertically from an ON-level of the switching element in a direction of an OFF-level of the switching element, and then starts falling with a slope, and again falls substantially vertically before reaching the OFF-level of the switching element. As such, the writing of the data signal to the pixel electrode may be securely carried out even when the writing period for each scanning signal is reduced, thereby displaying a high-quality image.Type: ApplicationFiled: July 25, 2008Publication date: January 8, 2009Inventor: Hidetaka Mizumaki
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Patent number: 7460114Abstract: A display device is for carrying out display by supplying a data signal, that is supplied from a video signal line, to one of a plurality of pixel electrodes via a switching element, and by supplying a scanning signal for controlling ON/OFF state of the switching element to the switching element via a scanning signal line that is orthogonal to the video signal line and is connected to the switching element. When the scanning signal is outputted to the scanning signal line, the scanning signal has a falling waveform that first falls substantially vertically from an ON-level of the switching element in a direction of an OFF-level of the switching element, and then starts falling with a slope, and again falls substantially vertically before reaching the OFF-level of the switching element. As such, the writing of the data signal to the pixel electrode may be securely carried out even when the writing period for each scanning signal is reduced, thereby displaying a high-quality image.Type: GrantFiled: September 10, 2004Date of Patent: December 2, 2008Assignee: Sharp Kabushiki KaishaInventor: Hidetaka Mizumaki
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Patent number: 7454228Abstract: The display system of the present invention includes: a body unit for transmitting display data that has been generated; and a display device for displaying an image in accordance with the display data that has been transmitted from the body unit. The display system is characterized in that the body unit and the display device perform communications via radio communication means, and the body unit and the display device are separately provided. Thus, the radio transmission is used as communication means, and there is no cable connecting the display device and the body unit that transfers the display data, so that the user can operate the system freely while watching the display device.Type: GrantFiled: June 1, 2001Date of Patent: November 18, 2008Assignee: Sharp Kabushiki KaishaInventors: Hidetaka Mizumaki, Katsuya Mizukata, Yasukuni Yamane
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Patent number: 7423627Abstract: A display apparatus has a display area which is divided into first and second display sections that can be independently driven in a scan direction and scanned collaterally. A control circuit controls signal line driving circuits such that the scanning signal lines of the respective display sections are sequentially selected during a plurality of time periods in one frame and the respective display sections are repeatedly scanned in one cycle as many times as the number of the time periods. The signal line driving circuits are supplied with one of the display data and interpolation display data during at least one time period, whereas supplied with the other one of the display data and the interpolation display data during at least one other time period. This ensures to avoid the reduction of brightness and to improve the display quality of moving images.Type: GrantFiled: January 22, 2004Date of Patent: September 9, 2008Assignee: Sharp Kabushiki KaishaInventor: Hidetaka Mizumaki
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Patent number: 7420538Abstract: A liquid crystal display device of the present invention includes (i) a temperature sensor provided in at least one of pixels in a displaying area of a display panel, (ii) a lead line buried in the display panel, for transmitting a detection signal from the temperature sensor to a vicinity of the display panel, (iii) a temperature measurement control section for measuring a pixel temperature based on the detection signal transmitted from the temperature sensor, (iv) a data signal line driving section for outputting the data signal to the data signal lines in accordance with the pixel temperature measured in the temperature measurement control section.Type: GrantFiled: December 1, 2004Date of Patent: September 2, 2008Assignee: Sharp Kabushiki KaishaInventors: Masayuki Murao, Hidetaka Mizumaki