Patents by Inventor Takahisa Shiramizu
Takahisa Shiramizu 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: 10319269Abstract: A laser light source device includes a semiconductor laser, a current supplying unit to supply a driving current to the semiconductor laser, and a signal generator to generate current intensity data for setting an intensity of the driving current. The signal generator generates, for an input signal corresponding to continuous pixels for a same color, a plurality of sets of the current intensity data indicating current intensities different from each other, and transmits the plurality of sets of the current intensity data to the current supplying unit while sequentially switching the plurality of sets of the current intensity data. The current supplying unit drives the semiconductor laser based on the plurality of different sets of the current intensity data.Type: GrantFiled: April 26, 2016Date of Patent: June 11, 2019Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Takahisa Shiramizu, Tetsuro Mizushima, Junichi Mutoh, Susumu Uragami
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Patent number: 10302938Abstract: A light source device includes a laser light source, a first adjustment mechanism, a second adjustment mechanism, and a mirror. The laser light source emits laser light. The first adjustment mechanism is configured such that the laser light from the laser light source is incident thereto, and performs an emission angle adjustment of the laser light and a focus adjustment of the laser light. The second adjustment mechanism is configured such that the laser light from the first adjustment mechanism is incident thereto, and performs a positional adjustment of the incident laser light. The mirror is configured such that the laser light from the second adjustment mechanism is incident thereto, and emits the incident laser light in a predetermined direction. An image display apparatus includes the above light source device.Type: GrantFiled: January 24, 2017Date of Patent: May 28, 2019Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Susumu Uragami, Hiroyuki Furuya, Takahisa Shiramizu, Akira Kurozuka, Yuta Yamamoto
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Patent number: 10031336Abstract: An image display device includes a light source, a screen, an optical system and a driving unit. The screen is irradiated with light from the light source to form an image. The optical system generates a virtual image with the light from the screen. The driving unit moves the screen in an optical axis direction. The driving unit includes a holder, one or more elastic members and a driving source. The holder holds the screen. The one or more elastic members support the holder so as to enable the holder to reciprocally move in the optical axis direction. The driving source generates force for moving the holder in the optical axis direction.Type: GrantFiled: January 11, 2017Date of Patent: July 24, 2018Assignee: Panasonic Intellectual Property Management Co., Ltd.Inventors: Susumu Uragami, Takahisa Shiramizu, Akira Kurozuka, Hiroyuki Furuya
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Patent number: 9905997Abstract: An image display device includes a laser light source, a controller, a temperature acquisition unit, and an image forming unit. The laser light source emits a plurality of laser beams including a red laser beam, a green laser beam, and a blue laser beam. The controller controls lighting of the laser light source. The temperature acquisition unit obtains temperature information with respect to the laser light source. The image forming unit creates an image from the plurality of laser beams emitted from the laser light source. The controller varies a light output ratio between the plurality of laser beams, based on the temperature information obtained by the temperature acquisition unit.Type: GrantFiled: December 16, 2016Date of Patent: February 27, 2018Assignee: Panasonic Intellectual Property Management Co., Ltd.Inventors: Hiroyuki Furuya, Takahisa Shiramizu
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Patent number: 9900567Abstract: An image display device includes a light source, a screen, an optical system, a screen driving mechanism unit, a memory unit, and a screen driving circuit unit. An image is formed on the screen by being irradiated with light from the light source. The screen driving mechanism unit moves the screen in an optical axis direction of the light. A smoothed movement profile is obtained by smoothing a movement profile used as a target for moving the screen so as to make a moving speed of the screen vary gently. The memory unit stores screen driving waveform information that has been generated so that the screen follows the smoothed movement profile. The screen driving circuit unit drives the screen driving mechanism unit, based on the screen driving waveform information stored in the memory unit.Type: GrantFiled: February 6, 2017Date of Patent: February 20, 2018Assignee: Panasonic Intellectual Property Management Co., Ltd.Inventors: Susumu Uragami, Hiroyuki Furuya, Takahisa Shiramizu, Akira Kurozuka, Yuta Yamamoto
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Patent number: 9835859Abstract: An image display device includes a light source that emits a light beam, a screen, a scanning section that scans the screen with the light beam, an optical system, a drive section, and a screen drive circuit. The optical system generates a virtual image by using the light beam that has passed through the screen. The drive section moves the screen at least in parallel to a travel direction of the light beam. The screen drive circuit contains a drive signal table that stores an information group for use in generating a drive signal tailored to stop the screen at different stop locations over different stop periods. The screen drive circuit selects first information in the drive signal table which is associated with displaying of an image and supplies the drive section with a first drive signal generated from the first information.Type: GrantFiled: August 2, 2016Date of Patent: December 5, 2017Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Hiroyuki Furuya, Takahisa Shiramizu, Susumu Uragami, Yoshiro Kashiwabara
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Publication number: 20170264872Abstract: An image display device includes a light source, a screen, an optical system, a screen driving mechanism unit, a memory unit, and a screen driving circuit unit. An image is formed on the screen by being irradiated with light from the light source. The screen driving mechanism unit moves the screen in an optical axis direction of the light. A smoothed movement profile is obtained by smoothing a movement profile used as a target for moving the screen so as to make a moving speed of the screen vary gently. The memory unit stores screen driving waveform information that has been generated so that the screen follows the smoothed movement profile. The screen driving circuit unit drives the screen driving mechanism unit, based on the screen driving waveform information stored in the memory unit.Type: ApplicationFiled: February 6, 2017Publication date: September 14, 2017Inventors: SUSUMU URAGAMI, HIROYUKI FURUYA, TAKAHISA SHIRAMIZU, AKIRA KUROZUKA, YUTA YAMAMOTO
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Publication number: 20170227763Abstract: A light source device includes a laser light source, a first adjustment mechanism, a second adjustment mechanism, and a mirror. The laser light source emits laser light. The first adjustment mechanism is configured such that the laser light from the laser light source is incident thereto, and performs an emission angle adjustment of the laser light and a focus adjustment of the laser light. The second adjustment mechanism is configured such that the laser light from the first adjustment mechanism is incident thereto, and performs a positional adjustment of the incident laser light. The mirror is configured such that the laser light from the second adjustment mechanism is incident thereto, and emits the incident laser light in a predetermined direction. An image display apparatus includes the above light source device.Type: ApplicationFiled: January 24, 2017Publication date: August 10, 2017Inventors: SUSUMU URAGAMI, HIROYUKI FURUYA, TAKAHISA SHIRAMIZU, AKIRA KUROZUKA, YUTA YAMAMOTO
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Publication number: 20170212347Abstract: An image display device includes a light source, a screen, an optical system and a driving unit. The screen is irradiated with light from the light source to form an image. The optical system generates a virtual image with the light from the screen. The driving unit moves the screen in an optical axis direction. The driving unit includes a holder, one or more elastic members and a driving source. The holder holds the screen. The one or more elastic members support the holder so as to enable the holder to reciprocally move in the optical axis direction. The driving source generates force for moving the holder in the optical axis direction.Type: ApplicationFiled: January 11, 2017Publication date: July 27, 2017Inventors: SUSUMU URAGAMI, TAKAHISA SHIRAMIZU, AKIRA KUROZUKA, HIROYUKI FURUYA
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Publication number: 20170201068Abstract: An image display device includes a laser light source, a controller, a temperature acquisition unit, and an image forming unit. The laser light source emits a plurality of laser beams including a red laser beam, a green laser beam, and a blue laser beam. The controller controls lighting of the laser light source. The temperature acquisition unit obtains temperature information with respect to the laser light source. The image forming unit creates an image from the plurality of laser beams emitted from the laser light source. The controller varies a light output ratio between the plurality of laser beams, based on the temperature information obtained by the temperature acquisition unit.Type: ApplicationFiled: December 16, 2016Publication date: July 13, 2017Inventors: HIROYUKI FURUYA, TAKAHISA SHIRAMIZU
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Publication number: 20170059861Abstract: An image display device includes a light source that emits a light beam, a screen, a scanning section that scans the screen with the light beam, an optical system, a drive section, and a screen drive circuit. The optical system generates a virtual image by using the light beam that has passed through the screen. The drive section moves the screen at least in parallel to a travel direction of the light beam. The screen drive circuit contains a drive signal table that stores an information group for use in generating a drive signal tailored to stop the screen at different stop locations over different stop periods. The screen drive circuit selects first information in the drive signal table which is associated with displaying of an image and supplies the drive section with a first drive signal generated from the first information.Type: ApplicationFiled: August 2, 2016Publication date: March 2, 2017Inventors: HIROYUKI FURUYA, TAKAHISA SHIRAMIZU, SUSUMU URAGAMI, YOSHIRO KASHIWABARA
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Publication number: 20160343280Abstract: A laser light source device includes a semiconductor laser, a current supplying unit to supply a driving current to the semiconductor laser, and a signal generator to generate current intensity data for setting an intensity of the driving current. The signal generator generates, for an input signal corresponding to continuous pixels for a same color, a plurality of sets of the current intensity data indicating current intensities different from each other, and transmits the plurality of sets of the current intensity data to the current supplying unit while sequentially switching the plurality of sets of the current intensity data. The current supplying unit drives the semiconductor laser based on the plurality of different sets of the current intensity data.Type: ApplicationFiled: April 26, 2016Publication date: November 24, 2016Inventors: TAKAHISA SHIRAMIZU, TETSURO MIZUSHIMA, JUNICHI MUTOH, SUSUMU URAGAMI
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Patent number: 8840252Abstract: An image display apparatus improves usability for a user in the case where a screen image is projected on a ceiling as a screen. The image display apparatus includes: a projection unit capable of vertically changing a projection angle; a projection angle detector detecting the projection angle of the projection unit; and a screen image corrector reversing a projected screen image. The screen image corrector switches the projected screen image from a reversed display to a standard display when the projection angle detected by the projection angle detector is less than or equal to a predetermined value.Type: GrantFiled: January 30, 2012Date of Patent: September 23, 2014Assignee: Panasonic CorporationInventors: Takahisa Shiramizu, Kazutaka Yasuda, Takayuki Ooie
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Patent number: 8541729Abstract: The image display system comprises laser light source units (2 to 4) for emitting green, red and blue laser beams, a laser output control unit (52) and a drive control unit (53). Upon detecting an overlapping in the output timing of the laser beams of two or more of the laser light source units, the drive control unit ceases the application of the drive current to at least one of the two or more laser light source units according to the output control signal.Type: GrantFiled: September 2, 2011Date of Patent: September 24, 2013Assignee: Panasonic CorporationInventors: Tsuyoshi Yoshimoto, Takahisa Shiramizu
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Publication number: 20120229779Abstract: An image display apparatus improves usability for a user in the case where a screen image is projected on a ceiling as a screen. The image display apparatus includes: a projection unit capable of vertically changing a projection angle; a projection angle detector detecting the projection angle of the projection unit; and a screen image corrector reversing a projected screen image. The screen image corrector switches the projected screen image from a reversed display to a standard display when the projection angle detected by the projection angle detector is less than or equal to a predetermined value.Type: ApplicationFiled: January 30, 2012Publication date: September 13, 2012Applicant: PANASONIC CORPORATIONInventors: Takahisa SHIRAMIZU, Kazutaka YASUDA, Takayuki OOIE
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Publication number: 20120062851Abstract: The image display system comprises laser light source units (2 to 4) for emitting green, red and blue laser beams, a laser output control unit (52) and a drive control unit (53). Upon detecting an overlapping in the output timing of the laser beams of two or more of the laser light source units, the drive control unit ceases the application of the drive current to at least one of the two or more laser light source units according to the output control signal.Type: ApplicationFiled: September 2, 2011Publication date: March 15, 2012Applicant: PANASONIC CORPORATIONInventors: Tsuyoshi YOSHIMOTO, Takahisa SHIRAMIZU
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Publication number: 20120062852Abstract: An image display device includes a housing that accommodates a plurality of laser light source devices that emit laser light of respective colors, a light modulator, a projection optical system and a controller, a movable body that is ejectable from and retractable into the housing and includes at least the projection optical system, a first switch that turns ON in a use state in which the movable body is ejected from the housing, and a second switch that turns ON in response to an operation of an operating portion by a user. The laser light is emitted from the plurality of laser light source devices when both of the first switch and the second switch turn ON. Accordingly, laser light is securely prevented from being emitted in a nonuse state by a switch erroneously turned ON.Type: ApplicationFiled: September 7, 2011Publication date: March 15, 2012Applicant: PANASONIC CORPORATIONInventors: Takahisa SHIRAMIZU, Nobuo JIKUYA
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Patent number: 7771205Abstract: A wiring board of the present invention has a terminal section and a wiring section connected to the terminal section. The terminal section is configured so as to have a plurality of long connection terminals placed at predetermined intervals along a direction orthogonal to a direction in which the wiring board is to be inserted; and short connection terminals arranged between adjacent long connection terminals so as to be located behind the respective long connection terminals with respect to the direction of insertion. At least one adjacent pair consisting of a long connection terminal and a short connection terminal is short-circuited, and the length of the thus-short-circuited short connection terminal is made shorter than non-short-circuit short connection terminals.Type: GrantFiled: March 16, 2009Date of Patent: August 10, 2010Assignee: Panasonic CorporationInventors: Takahisa Shiramizu, Yoshinobu Soeda, Masaomi Inoue
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Publication number: 20090233459Abstract: A wiring board of the present invention has a terminal section and a wiring section connected to the terminal section. The terminal section is configured so as to have a plurality of long connection terminals placed at predetermined intervals along a direction orthogonal to a direction in which the wiring board is to be inserted; and short connection terminals arranged between adjacent long connection terminals so as to be located behind the respective long connection terminals with respect to the direction of insertion. At least one adjacent pair consisting of a long connection terminal and a short connection terminal is short-circuited, and the length of the thus-short-circuited short connection terminal is made shorter than non-short-circuit short connection terminals.Type: ApplicationFiled: March 16, 2009Publication date: September 17, 2009Applicant: PANASONIC CORPORATIONInventors: Takahisa SHIRAMIZU, Yoshinobu SOEDA, Masaomi INOUE
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Patent number: 5575575Abstract: A small-sized printer includes a printing section equipped with a shuttle head in which impact-type printing units are arranged in juxtaposition in a sub-scanning direction, a cylindrical cam for reciprocating the shuttle head in the sub-scanning direction, and paper feeding rollers for feeding a standard sheet in a main scanning direction; an input device for inputting information; a display device for displaying information; a RAM for storing information; and a CPU for controlling the printing section, the input section, the display device and the RAM and performing calculation on information. The printing section and the paper feeding rollers are provided in a body case in such a way as to be exposed where they are opposed to a case cover, which has a flat platen and spring members at positions opposed to the printing section, and ribs adapted to come into contact with the standard sheet and serving as a positioning device and as a sliding guide.Type: GrantFiled: March 15, 1995Date of Patent: November 19, 1996Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Takehiko Ide, Hiroki Kokubu, Takahisa Shiramizu, Yuji Tanaka, Tetsuo Hayama, Takashi Takeda, Hiroyuki Fukusako, Keisuke Shiba, Akihiro Nishiyama, Norio Amamoto, Hidehito Nakamura, Tsutomu Egashira, Kouji Okada