Patents by Inventor Tetsuro Yamazaki
Tetsuro Yamazaki 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: 7514865Abstract: Exemplary embodiments of the invention provide a display panel, etc. which can be controlled by optical addressing, and which are simple in construction and can reduce costs. According to exemplary embodiments, a display device includes a first transparent electrode layer and a second transparent electrode layer which are optically transparent, a variable conductivity layer which is disposed on the first transparent electrode layer and whose electrical conductivity is changed in accordance with the light quantity of control light L transmitted through the first transparent electrode layer, and a functional layer having at least a light emission layer, which is stacked on the variable conductivity layer and which is interposed between the variable conductivity layer and the second transparent electrode layer.Type: GrantFiled: April 26, 2005Date of Patent: April 7, 2009Assignee: Seiko Epson CorporationInventors: Tetsuro Yamazaki, Takashi Takeda, Masatoshi Yonekubo
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Patent number: 7494227Abstract: An image display device for displaying an image by a light beam modulated according to an image signal includes: a light source unit that supplies the light beam; a scanning unit for performing scanning with the light beam from the light source unit; a screen that transmits the light beam from the scanning unit; a light detection unit that detects light incoming from the screen via the scanning unit; and a light beam emission stop unit that stops emission of the light beam from the image display device according to an output from the light detection unit.Type: GrantFiled: April 12, 2006Date of Patent: February 24, 2009Assignee: Seiko Epson CorporationInventors: Tetsuro Yamazaki, Masatoshi Yonekubo, Takashi Takeda
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Publication number: 20090009832Abstract: A scan-type image display device which displays an image by scan of laser beam emitted from a light source in one direction and another direction of a light receiving surface includes: a first scan unit which performs scan of the laser beam in the one direction by deflecting the laser beam; a second scan unit which performs scan of the laser beam in the another direction by deflecting the laser beam; and a scan control unit which equalizes the scan width of the laser beam scan in the one direction by using the first scan unit performed at each position in the another direction within the light receiving surface.Type: ApplicationFiled: June 23, 2008Publication date: January 8, 2009Applicant: Seiko Epson CorporationInventor: Tetsuro Yamazaki
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Patent number: 7470031Abstract: An image display device includes a light source that supplies beam-like light; a scanning portion that scans light from the light source to display an image by using light from the scanning portion; and a connecting portion that electrically connects the light source and an external power source that supplies electric power to the light source; wherein the connecting portion is disposed in an optical path of light from the light source past the scanning portion, and, when light is irradiated from the scanning portion at energy equal to or more than predetermined energy, disconnects an electrical connection between the light source and the external power source.Type: GrantFiled: December 12, 2005Date of Patent: December 30, 2008Assignee: Seiko Epson CorporationInventors: Tetsuro Yamazaki, Masatoshi Yonekubo, Akira Shinbo
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Publication number: 20080158632Abstract: A scanning-type image display device includes: a light source section; a horizontal scanner; a vertical scanner, and a vertical scanner control section in such manner that, when a discrepancy occurs between a target scan line number and a scannable line number, and when a difference obtained by subtracting of the target scan line number from the scannable line number is a positive value, the vertical scanner control section controls the vertical scanner so as to put vertical scanning on standby within a time range from a point of time at which horizontal scanning is completed in a first frame to a point of time at which a horizontal scanning start signal corresponding to a vertical synchronizing signal of the video signal in a second frame is input, and restarts the vertical scanning in synchronization with an input timing of the horizontal scanning start signal.Type: ApplicationFiled: August 7, 2007Publication date: July 3, 2008Applicant: SEIKO EPSON CORPORATIONInventor: Tetsuro Yamazaki
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Patent number: 7377656Abstract: A projector of rear-projection type including a light source that outputs a laser beam and a scanner that scans a screen with the laser beam. When a laser beam with energy exceeds an accessible emission limit due to failure of the light source or the scanner, at least one optical member located in an optical path of the laser beam is arranged so as to be broken or altered in quality and to prevent or discourage the beam with energy exceeding the accessible emission limit from being output from the screen.Type: GrantFiled: August 2, 2005Date of Patent: May 27, 2008Assignee: Seiko Epson CorporationInventors: Shigeo Nojima, Masatoshi Yonekubo, Takashi Takeda, Tetsuro Yamazaki
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Publication number: 20080049101Abstract: A scanning-type image display device includes: a light source section; a horizontal scanner, a vertical scanner; and a vertical scanner control section that controls the vertical scanner in such a manner that, when a second video signal is input, the vertical scanner control section controls the vertical scanner so as to perform vertical scanning with a scanning speed of vertical scanning which is higher than that of vertical scanning in the case of a first video signal being input, and after temporarily retuning a drawing position to an initial position within a time range from a point of time at which horizontal scanning of a current frame is completed to a start time of a next frame, the vertical scanner control section restarts the vertical scanning from the initial position in synchronization with a start timing of the next frame.Type: ApplicationFiled: August 8, 2007Publication date: February 28, 2008Applicant: SEIKO EPSON CORPORATIONInventor: Tetsuro Yamazaki
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Publication number: 20070040998Abstract: To reduce the color break-up and to provide high quality projection images. A method of driving a spatial light modulator, including generating a sub-frame pulse signal for a first colored light R1 through R8, B1 through B8, generating a sub-frame pulse signal for a second colored light G1 through G8, arranging the sub-frame pulse signals for the respective colored light so that at least three of the sub-frame pulse signals for the first colored light R1 through R8, B1 through B8 adjoin either one of the sub-frame pulse signals for the second colored light G1 through G8 during at least one frame of the image, and driving a plurality of movable mirror elements in accordance with the sub-frame pulse signals for the respective colored light arranged in arranging the sub-frame pulse signals, the movable mirror elements being alternatively moved at least to a first reflecting position and a second reflecting position.Type: ApplicationFiled: October 31, 2006Publication date: February 22, 2007Applicant: Seiko Epson CorporationInventors: Tetsuro Yamazaki, Hidehito Iisaka
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Publication number: 20070035508Abstract: A light scan device which forces a beam light depending on an image signal to scan, including: a light source part for supplying the beam light; and a scanning part for forcing the beam light from the light source part to scan an illumination-target region in a first direction and a second direction substantially orthogonal to the first direction, wherein the scanning part is driven so that a frequency with which the beam light is forced to scan in the first direction is higher than a frequency with which the beam light is forced to scan in the second direction, and a spot formed on the illumination-target region by the beam light has a form with a shorter size in the first direction than in the second direction.Type: ApplicationFiled: August 9, 2006Publication date: February 15, 2007Applicant: SEIKO EPSON CORPORATIONInventors: Tetsuro YAMAZAKI, Takashi TAKEDA, Daisuke UCHIKAWA, Yasunaga MIYAZAWA
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Publication number: 20070008501Abstract: An image display device for displaying an image by a light beam modulated according to an image signal includes: a light source unit that supplies the light beam; a scanning unit for performing scanning with the light beam from the light source unit; a screen that transmits the light beam from the scanning unit; a light detection unit that detects light incoming from the screen via the scanning unit; and a light beam emission stop unit that stops emission of the light beam from the image display device according to an output from the light detection unit.Type: ApplicationFiled: April 12, 2006Publication date: January 11, 2007Applicant: Seiko Epson CorporationInventors: Tetsuro YAMAZAKI, Masatoshi YONEKUBO, Takashi TAKEDA
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Patent number: 7147331Abstract: To reduce the color break-up and to provide high quality projection images. A method of driving a spatial light modulator, including generating a sub-frame pulse signal for a first colored light R1 through R8, B1 through B8, generating a sub-frame pulse signal for a second colored light G1 through G8, arranging the sub-frame pulse signals for the respective colored light so that at least three of the sub-frame pulse signals for the first colored light R1 through R8, B1 through B8 adjoin either one of the sub-frame pulse signals for the second colored light G1 through G8 during at least one frame of the image, and driving a plurality of movable mirror elements in accordance with the sub-frame pulse signals for the respective colored light arranged in arranging the sub-frame pulse signals, the movable mirror elements being alternatively moved at least to a first reflecting position and a second reflecting position.Type: GrantFiled: June 4, 2004Date of Patent: December 12, 2006Assignee: Seiko Epson CorporationInventors: Tetsuro Yamazaki, Hidehito Iisaka
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Publication number: 20060209264Abstract: An image display device includes a light source that supplies beam-like light; a scanning portion that scans light from the light source to display an image by using light from the scanning portion; and a connecting portion that electrically connects the light source and an external power source that supplies electric power to the light source; wherein the connecting portion is disposed in an optical path of light from the light source past the scanning portion, and, when light is irradiated from the scanning portion at energy equal to or more than predetermined energy, disconnects an electrical connection between the light source and the external power source.Type: ApplicationFiled: December 12, 2005Publication date: September 21, 2006Applicant: SEIKO EPSON CORPORATIONInventors: Tetsuro Yamazaki, Masatoshi Yonekubo, Akira Shinbo
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Publication number: 20060181756Abstract: A light scanning device including: a light source that supplies light in the form of a beam; a reflection mirror that reflects the light beam from the light source; and a movable member that is provided integrally with the reflection mirror and displaces the light beam reflected from the reflection mirror so as to be scanned in a first direction and in a second direction substantially orthogonal to the first direction, the movable member being displaced so that a frequency to scan the light beam in the first direction is higher than the frequency to scan the light beam in the second direction, the reflection mirror being displaced not only in association with the movable member but also for allowing the light beam to be scanned in a direction different from the first direction and correcting the position of the light beam to be scanned in accordance with displacement of the movable member.Type: ApplicationFiled: December 16, 2005Publication date: August 17, 2006Applicant: Seiko Epson CorporationInventor: Tetsuro Yamazaki
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Patent number: 7071611Abstract: Exemplary embodiments of the present invention provide a display panel or the like in which it is easy to enlarge a size of the display panel. A display panel according to exemplary embodiments includes a first transparent electrode layer and a second transparent electrode layer which are optically transparent, a conductivity-variable layer which is provided on the first transparent electrode layer, and an electroluminescent layer which is provided between the conductivity-variable layer and the second transparent electrode layer, and which emits light by applying a voltage thereto.Type: GrantFiled: September 14, 2004Date of Patent: July 4, 2006Assignee: Seiko Epson CorporationInventors: Masatoshi Yonekubo, Takashi Takeda, Tetsuro Yamazaki
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Patent number: 7025475Abstract: An illumination device includes: an integrator that transmits light from an incident side thereof to an emitting side thereof; a light source that supplies the light to the incident side of the integrator, the light source including a reflector and a lamp located on a center axis of the reflector; and a center mirror located on a line connecting the center the incident side of the integrator and the lamp, the center mirror being capable of reflecting light from the integrator back to the integrator. The center mirror has a smaller diameter than that of an opening of the reflector.Type: GrantFiled: March 26, 2003Date of Patent: April 11, 2006Assignee: Seiko Epson CorporationInventors: Tetsuro Yamazaki, Shunji Kamijima, Daisuke Uchikawa
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Publication number: 20060028622Abstract: A projector of rear-projection type including a light source that outputs a laser beam and a scanner that scans a screen with the laser beam. When a laser beam with energy exceeds an accessible emission limit due to failure of the light source or the scanner, at least one optical member located in an optical path of the laser beam is arranged so as to be broken or altered in quality and to prevent or discourage the beam with energy exceeding the accessible emission limit from being output from the screen.Type: ApplicationFiled: August 2, 2005Publication date: February 9, 2006Applicant: SEIKO EPSON CORPORATIONInventors: Shigeo Nojima, Masatoshi Yonekubo, Takashi Takeda, Tetsuro Yamazaki
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Publication number: 20050242710Abstract: Exemplary embodiments of the invention provide a display panel, etc. which can be controlled by optical addressing, and which are simple in construction and can reduce costs. According to exemplary embodiments, a display device includes a first transparent electrode layer and a second transparent electrode layer which are optically transparent, a variable conductivity layer which is disposed on the first transparent electrode layer and whose electrical conductivity is changed in accordance with the light quantity of control light L transmitted through the first transparent electrode layer, and a functional layer having at least a light emission layer, which is stacked on the variable conductivity layer and which is interposed between the variable conductivity layer and the second transparent electrode layer.Type: ApplicationFiled: April 26, 2005Publication date: November 3, 2005Applicant: Seiko Epson CorporationInventors: Tetsuro Yamazaki, Takashi Takeda, Masatoshi Yonekubo
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Patent number: 6937378Abstract: An optically controlled device includes a transparent electrode, a conductivity variable portion, a driving electrode, a movable unit, and a support portion. A method of controlling the optically controlled device includes inputting a control light into the transparent electrode, applying a voltage modulated according to an input signal between the transparent electrode and the movable unit, and moving the movable unit to a predetermined position by generating a force corresponding to the voltage between the driving electrode and the movable unit base on a charge of electrical conductivity of the conductivity variable portion.Type: GrantFiled: August 16, 2004Date of Patent: August 30, 2005Assignee: Seiko Epson CorporationInventors: Tetsuro Yamazaki, Masatoshi Yonekubo, Takashi Takeda
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Publication number: 20050093465Abstract: Exemplary embodiments of the present invention provide a display panel or the like in which it is easy to enlarge a size of the display panel. A display panel according to exemplary embodiments includes a first transparent electrode layer and a second transparent electrode layer which are optically transparent, a conductivity-variable layer which is provided on the first transparent electrode layer, and an electroluminescent layer which is provided between the conductivity-variable layer and the second transparent electrode layer, and which emits light by applying a voltage thereto.Type: ApplicationFiled: September 14, 2004Publication date: May 5, 2005Applicant: SEIKO EPSON CORPORATIONInventors: Masatoshi Yonekubo, Takashi Takeda, Tetsuro Yamazaki
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Publication number: 20050083565Abstract: An optically controlled device includes a transparent electrode, a conductivity variable portion, a driving electrode, a movable unit, and a support portion. A method of controlling the optically controlled device includes inputting a control light into the transparent electrode, applying a voltage modulated according to an input signal between the transparent electrode and the movable unit, and moving the movable unit to a predetermined position by generating a force corresponding to the voltage between the driving electrode and the movable unit based on a change of electrical conductivity of the conductivity variable portion.Type: ApplicationFiled: August 16, 2004Publication date: April 21, 2005Applicant: SEIKO EPSON CORPORATIONInventors: Tetsuro Yamazaki, Masatoshi Yonekubo, Takashi Takeda