Patents by Inventor Tetsushi Sato
Tetsushi Sato 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: 20200166772Abstract: A display device includes a display panel including a plurality of pixels arrayed along first and second directions, a distribution unit that distributes light emitted from each pixel configured to display a parallax image corresponding to each of a plurality of viewpoints, and a light blocking unit between the display panel and the distribution unit. The distribution unit distributes light emitted from each of the pixels to the plurality of viewpoints along the first direction in a first display state where the display panel displays a parallax image, or stops distributing emitted light in a second display state, displaying a planar image. The light blocking unit forms, along the first direction, a plurality of first light blocking areas each extending along the second direction blocking some emitted light in the first display state, and stops forming the first light blocking areas in the second display state.Type: ApplicationFiled: January 31, 2020Publication date: May 28, 2020Inventors: Jin MATSUSHIMA, Koji SHIGEMURA, Yukie KEICHO, Tetsushi SATO
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Publication number: 20200170087Abstract: A control circuit is configured to: change a dispersion state of the electrophoretic particles by controlling voltage across the first transparent electrode and the second transparent electrode to change a range of exit direction of light transmitted through the light transmissive regions and the dispersion medium; apply direct voltage at a first voltage value across the first transparent electrode and the second transparent electrode to change the range of exit direction from a narrow range to a wide range; measure luminance of light transmitted through the light beam direction control panel during application of the voltage at the first voltage value; and increase the voltage value to be applied across the first transparent electrode and the second transparent electrode in a case where the measured luminance of the transmitted light is lower than a target value.Type: ApplicationFiled: November 27, 2019Publication date: May 28, 2020Applicant: TIANMA JAPAN, LTD.Inventors: Tetsushi SATO, Kazunori MASUMURA, Kunihiro SHIOTA, Kenichi TAKATORI
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Patent number: 10585295Abstract: A display device includes a display panel including a plurality of pixels arrayed along first and second directions, a distribution unit that distributes light emitted from each pixel configured to display a parallax image corresponding to each of a plurality of viewpoints, and a light blocking unit between the display panel and the distribution unit. The distribution unit distributes light emitted from each of the pixels to the plurality of viewpoints along the first direction in a first display state where the display panel displays a parallax image, or stops distributing emitted light in a second display state, displaying a planar image. The light blocking unit forms, along the first direction, a plurality of first light blocking areas each extending along the second direction blocking some emitted light in the first display state, and stops forming the first light blocking areas in the second display state.Type: GrantFiled: July 13, 2018Date of Patent: March 10, 2020Assignee: TIANMA MICROELECTRONICS CO., LTD.Inventors: Jin Matsushima, Koji Shigemura, Yukie Keicho, Tetsushi Sato
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Patent number: 10506212Abstract: A stereoscopic display apparatus includes: a projector of a planar shape that projects images by using light acquired by dividing light rays; an optical device of a planar shape that outputs incident light incident from a first face from a second face; and a supporting unit that supports at least one of the projector and the optical device to be in a first state or a second state in an orthogonal three-dimensional coordinate system. The optical device outputs incident light incident from a first point on a projection surface of the projector to a second point having plane symmetry with respect to a plane of the optical device as a reference.Type: GrantFiled: January 9, 2019Date of Patent: December 10, 2019Assignee: TIANMA MICROELECTRONICS CO., LTD.Inventors: Kazunori Masumura, Tetsushi Sato, Koji Shigemura
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Patent number: 10448005Abstract: A disclosed stereoscopic display device includes: a naked-eye stereoscopic display that projects respectively-different images into observer's left eye and right eye aligned in a first direction based on input images corresponding to two viewpoints; a flat-plate-shaped spatial imaging device that includes a plurality of optical reflection devices reflecting light transmitted from an object on a first reflection surface and a second reflection surface that are orthogonal to each other, the spatial imaging device emitting light that is emitted from the naked-eye stereoscopic display and is incident to an incident surface from an emission surface to an observer side; and an image processing unit that interchanges portions corresponding to reverse viewing areas in which depth parallax and popup parallax of the input images corresponding to the two viewpoints are reversed in a case where, in an image projecting one input image, an image projecting the other input image is mixed.Type: GrantFiled: January 21, 2016Date of Patent: October 15, 2019Assignee: NLT TECHNOLOGIES, LTD.Inventors: Tetsushi Sato, Koji Shigemura
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Publication number: 20190179208Abstract: A light beam direction control device is provided with a transparent substrates in which main surfaces of the transparent substrate are opposed to each other, transparent conductive films respectively disposed on the main surface side of the transparent substrate, electrodes electrically connected to the transparent conductive films, a control circuit for controlling a potential difference between the transparent conductive films and a plurality of light beam transmitting regions arranged on the transparent substrates, light beam absorbing regions disposed between the adjacent light beam transmitting regions, and the transparent conductive films. When shifting the range of outgoing direction of light beam to a narrow state, the control circuit applies the electrodes electrically open and holds the open state.Type: ApplicationFiled: December 10, 2018Publication date: June 13, 2019Applicant: Tianma Japan, Ltd.Inventors: Tetsushi SATO, Kazunori MASUMURA, Kunihiro SHIOTA
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Publication number: 20190149800Abstract: A stereoscopic display apparatus includes: a projector of a planar shape that projects images by using light acquired by dividing light rays; an optical device of a planar shape that outputs incident light incident from a first face from a second face; and a supporting unit that supports at least one of the projector and the optical device to be in a first state or a second state in an orthogonal three-dimensional coordinate system. The optical device outputs incident light incident from a first point on a projection surface of the projector to a second point having plane symmetry with respect to a plane of the optical device as a reference.Type: ApplicationFiled: January 9, 2019Publication date: May 16, 2019Inventors: Kazunori MASUMURA, Tetsushi SATO, Koji SHIGEMURA
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Publication number: 20190080640Abstract: An example of display apparatus includes: a display panel in which unit pixels each constituted by at least a first subpixel displaying a first pattern and a second subpixel displaying a second pattern are alternately arranged in a row or column direction; and a signal processing unit modulating, for image data including the first pattern and image data including the second pattern, a difference in maximum gradation values in the image data, and controlling synchronization or non-synchronization of a rise or fall between bit signals of a coupled image signal input to the display panel.Type: ApplicationFiled: August 21, 2018Publication date: March 14, 2019Applicant: TIANMA JAPAN, LTD.Inventors: Kazunori MASUMURA, Koji SHIGEMURA, Tetsushi SATO
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Patent number: 10225541Abstract: A stereoscopic display apparatus includes: a projector of a planar shape that projects images by using light acquired by dividing light rays; an optical device of a planar shape that outputs incident light incident from a first face from a second face; and a supporting unit that supports at least one of the projector and the optical device to be in a first state or a second state in an orthogonal three-dimensional coordinate system. The optical device outputs incident light incident from a first point on a projection surface of the projector to a second point having plane symmetry with respect to a plane of the optical device as a reference.Type: GrantFiled: July 21, 2017Date of Patent: March 5, 2019Assignee: TIANMA JAPAN, LTD.Inventors: Kazunori Masumura, Tetsushi Sato, Koji Shigemura
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Publication number: 20190018256Abstract: A display device includes a display panel including a plurality of pixels arrayed along first and second directions, a distribution unit that distributes light emitted from each pixel configured to display a parallax image corresponding to each of a plurality of viewpoints, and a light blocking unit between the display panel and the distribution unit. The distribution unit distributes light emitted from each of the pixels to the plurality of viewpoints along the first direction in a first display state where the display panel displays a parallax image, or stops distributing emitted light in a second display state, displaying a planar image. The light blocking unit forms, along the first direction, a plurality of first light blocking areas each extending along the second direction blocking some emitted light in the first display state, and stops forming the first light blocking areas in the second display state.Type: ApplicationFiled: July 13, 2018Publication date: January 17, 2019Inventors: Jin MATSUSHIMA, Koji SHIGEMURA, Yukie KEICHO, Tetsushi SATO
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Patent number: 10096275Abstract: An example of display apparatus includes: a display panel in which unit pixels each constituted by at least a first subpixel displaying a first pattern and a second subpixel displaying a second pattern are alternately arranged in a row or column direction; and a signal processing unit modulating, for image data including the first pattern and image data including the second pattern, a difference in maximum gradation values in the image data, and controlling synchronization or non-synchronization of a rise or fall between bit signals of a coupled image signal input to the display panel.Type: GrantFiled: August 2, 2016Date of Patent: October 9, 2018Assignee: NLT TECHNOLOGIES, LTD.Inventors: Kazunori Masumura, Koji Shigemura, Tetsushi Sato
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Publication number: 20180027225Abstract: A stereoscopic display apparatus includes: a projector of a planar shape that projects images by using light acquired by dividing light rays; an optical device of a planar shape that outputs incident light incident from a first face from a second face; and a supporting unit that supports at least one of the projector and the optical device to be in a first state or a second state in an orthogonal three-dimensional coordinate system. The optical device outputs incident light incident from a first point on a projection surface of the projector to a second point having plane symmetry with respect to a plane of the optical device as a reference.Type: ApplicationFiled: July 21, 2017Publication date: January 25, 2018Inventors: Kazunori MASUMURA, Tetsushi SATO, Koji SHIGEMURA
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Publication number: 20170039927Abstract: An example of display apparatus includes: a display panel in which unit pixels each constituted by at least a first subpixel displaying a first pattern and a second subpixel displaying a second pattern are alternately arranged in a row or column direction; and a signal processing unit modulating, for image data including the first pattern and image data including the second pattern, a difference in maximum gradation values in the image data, and controlling synchronization or non-synchronization of a rise or fall between bit signals of a coupled image signal input to the display panel.Type: ApplicationFiled: August 2, 2016Publication date: February 9, 2017Applicant: NLT TECHNOLOGIES, LTD.Inventors: Kazunori MASUMURA, Koji SHIGEMURA, Tetsushi SATO
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Publication number: 20160351097Abstract: An image update determining unit compares a previously set temperature with a temperature estimated by a temperature increase estimating unit, and determines whether or not an image update operation is executable, and an image update interval is appropriately set according to the estimated temperature by performing image update on an image to be displayed next when the image update determining unit determines the image update operation to be executable but not performing image update when the image update determining unit determines the image update operation to be non-executable.Type: ApplicationFiled: May 31, 2016Publication date: December 1, 2016Applicant: NLT Technologies, Ltd.Inventors: Tetsushi SATO, Kazunori MASUMURA, Koji SHIGEMURA
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Publication number: 20160219260Abstract: A disclosed stereoscopic display device includes: a naked-eye stereoscopic display that projects respectively-different images into observer's left eye and right eye aligned in a first direction based on input images corresponding to two viewpoints; a flat-plate-shaped spatial imaging device that includes a plurality of optical reflection devices reflecting light transmitted from an object on a first reflection surface and a second reflection surface that are orthogonal to each other, the spatial imaging device emitting light that is emitted from the naked-eye stereoscopic display and is incident to an incident surface from an emission surface to an observer side; and an image processing unit that interchanges portions corresponding to reverse viewing areas in which depth parallax and popup parallax of the input images corresponding to the two viewpoints are reversed in a case where, in an image projecting one input image, an image projecting the other input image is mixed.Type: ApplicationFiled: January 21, 2016Publication date: July 28, 2016Inventors: Tetsushi SATO, Koji SHIGEMURA
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Patent number: 9177511Abstract: An electrophoretic display device is provided, in which an image update period is constituted with a reset period including at least a stirring pulse for stirring electrophoretic particles and a compensation pulse for suppressing accumulation of the residual DC component and with a set period including a set pulse for applying, to intended pixels, a voltage of polarity for making transition to black or white for a prescribed amount of time according to a next image. The voltage waveforms for each display gradation are so designed that a period where a positive voltage is applied to a counter electrode and a period where a negative voltage is applied do not overlap with each other, and a compensation pulse is applied after the stirring pulse which sets all the pixels of the display unit to a white or black base state. Thereby, changes in the display state are not visually recognized.Type: GrantFiled: September 16, 2013Date of Patent: November 3, 2015Assignee: NLT TECHNOLOGIES, LTD.Inventors: Tetsushi Sato, Michiaki Sakamoto
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Patent number: 9013516Abstract: An image display device expresses multiple colors including intermediate colors and an electrophoretic particle making up the image display device includes n-kinds of (n>2) charged particles each having colors and threshold value voltages each being different from one another. A specified period during which a voltage is applied includes a resetting period for applying a resetting voltage, a first, . . . , kth, . . . , nth voltage applying periods and a voltage to be applied includes a resetting voltage, 0V, first voltage (absolute value) to be applied within the first voltage applying period, 0V, kth voltage (absolute value) to be applied within kth voltage applying period, and 0V voltage, nth voltage (absolute value) to be applied within an nth voltage applying period. Relationships: |first applied voltage|>|kth applied voltage|>|nth voltage| and |first applied voltage|<|kth voltage|<|nth voltage| are satisfied.Type: GrantFiled: February 8, 2012Date of Patent: April 21, 2015Assignee: NLT Technologies, Ltd.Inventors: Michiaki Sakamoto, Koji Shigemura, Setsuo Kaneko, Tetsushi Sato, Kenichi Takatori
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Publication number: 20140078035Abstract: An electrophoretic display device is provided, in which an image update period is constituted with a reset period including at least a stirring pulse for stirring electrophoretic particles and a compensation pulse for suppressing accumulation of the residual DC component and with a set period including a set pulse for applying, to intended pixels, a voltage of polarity for making transition to black or white for a prescribed amount of time according to a next image. The voltage waveforms for each display gradation are so designed that a period where a positive voltage is applied to a counter electrode and a period where a negative voltage is applied do not overlap with each other, and a compensation pulse is applied after the stirring pulse which sets all the pixels of the display unit to a white or black base state. Thereby, changes in the display state are not visually recognized.Type: ApplicationFiled: September 16, 2013Publication date: March 20, 2014Applicant: NLT Technologies, Ltd.Inventors: Tetsushi SATO, Michiaki SAKAMOTO
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Publication number: 20120200610Abstract: An image display device expresses multiple colors including intermediate colors and an electrophoretic particle making up the image display device includes n-kinds of (n>2) charged particles each having colors and threshold value voltages each being different from one another. A specified period during which a voltage is applied includes a resetting period for applying a resetting voltage, a first, . . . , kth, . . . , nth voltage applying periods and a voltage to be applied includes a resetting voltage, OV, first voltage (absolute value) to be applied within the first voltage applying period, OV, kth voltage (absolute value) to be applied within kth voltage applying period, and OV voltage, nth voltage (absolute value) to be applied within an nth voltage applying period. Relationships: |first applied voltage|>|kth applied voltage|>|nth voltage| and |first applied voltage|<|kth voltage|<|nth voltage| are satisfied.Type: ApplicationFiled: February 8, 2012Publication date: August 9, 2012Applicant: NLT TECHNOLOGIES, LTD.Inventors: Michiaki SAKAMOTO, Koji SHIGEMURA, Setsuo KANEKO, Tetsushi SATO, Kenichi TAKATORI
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Patent number: 7656372Abstract: An object is to prevent a defective indication caused by a reverse twisted domain generated from the dummy pixel region which is provided in the periphery of a display pixel region. By setting a signal voltage to be applied to the pixels of the dummy pixel region to be lower than the maximum value of a video signal voltage which is applied to the display pixel region and also setting it to be in a level by which a defective indication is not caused due to a traverse electric field between the neighboring dummy pixel region and the display pixel region, generation of the reverse twisted domain within the dummy pixel region can be suppressed. Thereby, the defective indication caused by the reverse twist can be prevented.Type: GrantFiled: February 24, 2005Date of Patent: February 2, 2010Assignee: NEC CorporationInventors: Tetsushi Sato, Hiroyuki Sekine