Patents by Inventor Keiji Sugiyama
Keiji Sugiyama 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).
-
Patent number: 9134700Abstract: A display device (1) includes: a light source (101) that outputs a laser beam; an illumination optical system (102) that emits illumination light of the laser beam; a diffraction pattern generation unit that generates a diffraction pattern from original image data; a spatial modulation element (103) that diffracts the illumination light by displaying the diffraction pattern; and a display control unit that performs at least one of a change in a display timing of a diffraction pattern the spatial modulation element (103) displays and a change in a size of a diffraction pattern the diffraction pattern generation unit generates.Type: GrantFiled: March 23, 2012Date of Patent: September 15, 2015Assignee: Panasonic Intellectual Property Management Co., Ltd.Inventors: Keiji Sugiyama, Kakuya Yamamoto, Kenichi Kasazumi
-
Patent number: 9135847Abstract: An image display apparatus, including: a light source which emits coherent light; a spatial modulation element which diffracts the coherent light by displaying a diffraction grating pattern corresponding to an input image and which displays a virtual image by the diffracted light; and a control unit which calculates a total brightness representing a sum total of brightnesses of all pixels of the input image, and controls at least one of the light source and the spatial modulation element in such a manner that, if the total brightness has decreased, the virtual image is displayed at a lower brightness than a reference virtual image displayed when the input image is used directly.Type: GrantFiled: October 18, 2012Date of Patent: September 15, 2015Assignee: Panasonic Intellectual Property Management Co., Ltd.Inventors: Kenichi Kasazumi, Keiji Sugiyama, Kakuya Yamamoto
-
Patent number: 9113156Abstract: A display device includes: a light source which emits light; a light deflector having a deflection region in which the light from the light source is deflected toward a predetermined position; a liquid crystal panel on which the image is formed by the light from the light deflector; and a control unit which determines a total number of right and left eyes of one or more users and controls operation of the light deflector based on the determined total number of right and left eyes, wherein the control unit segments the deflection region into a plurality of deflection subregions based on the determined total number of right and left eyes and controls light deflection in the deflection subregions to deflect the light from the light source toward different positions at the same time.Type: GrantFiled: October 5, 2012Date of Patent: August 18, 2015Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Keiji Sugiyama, Shinichi Shikii
-
Publication number: 20150177591Abstract: An image display device includes a light source which emits light, a display element which receives the light, from the light source for generating display light, a light guiding plate which causes the display light to propagate therein, an incident element which allows the display light from the display element to be incident into the light guiding plate, and a dynamic output diffraction element provided in the light guiding plate for outputting the display light to the outside of the light guiding plate. The dynamic output diffraction element includes dynamic diffraction segment elements configured such that a diffraction function of diffracting light is invalidated or validated by voltage application. The image display device further includes a control unit which controls the dynamic output diffraction element such that one dynamic diffraction segment element whose diffraction function is validated is selected each at a time from among the dynamic diffraction segment elements.Type: ApplicationFiled: March 27, 2014Publication date: June 25, 2015Applicant: Panasonic Intellectual Property Management Co., LtInventors: Keiji Sugiyama, Kenichi Kasazumi
-
Patent number: 8934159Abstract: A see-through display including a light source for emitting light, a projection optical system for projecting the light emitted by the light source, and a volume hologram for deflecting the light projected by the projection optical system. The volume hologram has a linear expansion coefficient of ? (/° C.) and interference fringes recorded with recording light having a wavelength of ? (nm). The wavelength of the light emitted by the light source has a temperature dependency of K (nm/° C.), and the wavelength ? (nm) and the temperature dependency K (nm/° C.) satisfy the relationship of 0?K/??2?.Type: GrantFiled: April 19, 2011Date of Patent: January 13, 2015Assignee: Panasonic CorporationInventors: Shinichi Shikii, Keiji Sugiyama, Shinichi Kadowaki
-
Publication number: 20140355086Abstract: The instant application discloses a display device including a pattern generator configured to generate a diffraction pattern from an image; a light source configured to emit emission light; an optical condenser which condenses the emission light to generate illumination light; and a spatial light modulator which diffracts the illumination light according to the diffraction pattern to generate diffracted light. The diffracted light passes through the optical condenser.Type: ApplicationFiled: November 5, 2013Publication date: December 4, 2014Inventors: Keiji Sugiyama, Kenichi Kasazumi
-
Patent number: 8902130Abstract: An image display device includes a laser source for emitting a laser beam, an image forming element which uses the laser beam to emit image light for displaying an image, a first diffraction element for diffracting the image light, and a controller for controlling a display position of the image on the basis of a wavelength of the laser beam and a temperature of the first diffraction element.Type: GrantFiled: April 19, 2011Date of Patent: December 2, 2014Assignee: Panasonic CorporationInventors: Hiroyuki Furuya, Shinichi Shikii, Keiji Sugiyama
-
Patent number: 8891052Abstract: Included is a light emitting unit, an optical deflector, a control unit, and a liquid crystal panel. The optical deflector includes a first optical deflector and a second optical deflector which are arranged side by side in a direction from a light incident side to a light emitting side. A maximum light deflection angle of the first optical deflector is smaller than a maximum light deflection angle of the second optical deflector, and a maximum light deflection speed of the first optical deflector is higher than a maximum light deflection speed of the second optical deflector. The first optical deflector includes a first optical deflection layer and a second optical deflection layer stacked in the direction from the light incident side to the light emitting side. Each of the first and second optical deflection layers includes the liquid crystal deflection elements arranged in the planar state.Type: GrantFiled: July 13, 2012Date of Patent: November 18, 2014Assignee: Panasonic CorporationInventors: Keiji Sugiyama, Shinichi Shikii
-
Patent number: 8804247Abstract: A transmissive display device includes: a light source which outputs light; a display part which receives the light from the light source and generates display light representing an image; a deflecting element which changes a direction of the display light emitted from the display part; and a transmissive reflector which reflects, towards a user, light of a wavelength included in the display light emitted from the display part, and transmits light of other wavelengths. An angle formed by a straight line, which extends between an upper edge of an incident area of the display light on the transmissive reflector and a lower portion of an eyebox which is defined as a visible range of the reflected light from the transmissive reflector, with respect to a horizontal line is smaller than a difference between an emission angle and an incident angle of the display light at the transmissive reflector.Type: GrantFiled: December 8, 2010Date of Patent: August 12, 2014Assignee: Panasonic CorporationInventors: Keiji Sugiyama, Kenichi Kasazumi, Kakuya Yamamoto, Akira Kurozuka, Tatsuo Itoh, Shinichi Shikii
-
Publication number: 20140198141Abstract: An image display apparatus, including: a light source which emits coherent light; a spatial modulation element which diffracts the coherent light by displaying a diffraction grating pattern corresponding to an input image and which displays a virtual image by the diffracted light; and a control unit which calculates a total brightness representing a sum total of brightnesses of all pixels of the input image, and controls at least one of the light source and the spatial modulation element in such a manner that, if the total brightness has decreased, the virtual image is displayed at a lower brightness than a reference virtual image displayed when the input image is used directly.Type: ApplicationFiled: October 18, 2012Publication date: July 17, 2014Applicant: PANASONIC CORPORATIONInventors: Kenichi Kasazumi, Keiji Sugiyama, Kakuya Yamamoto
-
Publication number: 20140118825Abstract: A stereoscopic image display apparatus including: a light source unit; a light guide plate having an incidence surface and an emission surface; and a liquid-crystal panel which spatially modulates light. The light source unit emits the light so that the light is incident on the incidence surface in the first and second directions for the right and left eyes of a viewer, which are different from each other and each is inclined at a predetermined angle in the emission surface with respect to a reference direction perpendicular to an alignment direction of the right and left eyes of the viewer. Also, the light emitted from the emission surface of the light guide plate is in a direction which is determined according to the propagation direction of the incident light and in which a component in the alignment direction, included in the propagation direction, is maintained.Type: ApplicationFiled: June 7, 2013Publication date: May 1, 2014Inventors: Shinichi Shikii, Keiji Sugiyama
-
Patent number: 8698858Abstract: A transmissive display apparatus includes a transparent display panel, a display unit which projects a display light toward a display area of the transparent display panel, a ratio change unit which is provided to the display area, is configured to be capable of changing a light transmittance, and is configured to be capable of changing a ratio of a light quantity of a rear face reflected light reaching a viewpoint relative to a light quantity of a front face reflected light reaching the viewpoint, and a control unit which alternately switches the ratio change unit between a first state and a second state. The ratio change unit lowers, in the first state, the ratio by reducing the light quantity of the rear face reflected light that reaches the viewpoint in comparison to the second state. The light transmittance increases in the second state in comparison to the first state.Type: GrantFiled: June 1, 2012Date of Patent: April 15, 2014Assignee: Panasonic CorporationInventors: Akira Kurozuka, Shinichi Kadowaki, Kakuya Yamamoto, Kenichi Kasazumi, Keiji Sugiyama
-
Patent number: 8681143Abstract: A display apparatus, includes: a display light emission unit which includes a light source, forms an image, and emits display light corresponding to formed image; a deflection unit which deflects the display light; a narrow band reflection unit which has characteristics of reflecting only light in a reflected wavelength range and transmitting light of wavelengths other than the reflected wavelength range, and reflects the display light incident from the deflection unit towards a viewpoint; and a control unit which changes an incidence angle at which the display light is incident on the narrow band reflection unit, in accordance with change in a wavelength of the light, wherein the narrow band reflection unit is configured such that the reflected wavelength range changes when an incidence angle of light changes, and the control unit changes the incidence angle such that a wavelength of the light is included within the reflected wavelength range.Type: GrantFiled: May 31, 2012Date of Patent: March 25, 2014Assignee: Panasonic CorporationInventors: Keiji Sugiyama, Kenichi Kasazumi, Kakuya Yamamoto, Akira Kurozuka, Shinichi Shikii
-
Publication number: 20140049451Abstract: A display device includes a light source which outputs laser light, an illumination optical system which emits the laser light as illumination light, a spatial modulation element which diffracts the illumination light by displaying a diffraction pattern, a diffraction pattern acquiring unit which acquires a basic diffraction pattern generated based on an image, and a diffraction pattern process unit which uses the basic diffraction pattern and a correction diffraction pattern for correcting the basic diffraction pattern to generate, as the diffraction pattern to be displayed on the spatial modulation element, a combined diffraction pattern obtained by correcting the basic diffraction pattern by the correction diffraction pattern. The spatial modulation element displays diffracted light, which is diffracted by displaying the combined diffraction pattern, to a user as a fictive image.Type: ApplicationFiled: October 16, 2012Publication date: February 20, 2014Applicant: PANASONIC CORPORATIONInventors: Keiji Sugiyama, Kakuya Yamamoto, Kenichi Kasazumi
-
Publication number: 20130286678Abstract: A display device includes: a first light source which emits light; a second light source which emits light; a display panel which displays an image; a first light guide plate and a second light guide plate which guide, to the display panel, the light from the first light source and the light from the second light source, respectively; and a control unit which causes one of the first light source and the second light source to emit the light. A first divergence angle obtained when the light from the first light source enters the first light guide plate is larger than a second divergence angle obtained when the light from the second light source enters the second light guide plate.Type: ApplicationFiled: November 20, 2012Publication date: October 31, 2013Applicant: Panasonic CorporationInventors: Keiji Sugiyama, Shinichi Shikii
-
Publication number: 20130265623Abstract: A display device includes: a light source; an illumination optical system; a diffraction pattern generation unit; a spatial modulation element that generates diffracted light; and a shielding unit that selectively enters a first state where a first and second partial areas are a transmitting and shielding areas, respectively, and a second state where the first and second partial areas are the shielding and transmitting areas, respectively. The spatial modulation element displays the fictive image on a first and second display areas corresponding to the first and second partial areas when the shielding unit is in the first and second states, respectively. The diffraction pattern generation unit generates a first and second portion diffraction patterns from an image in an area corresponding to the first and second display areas out of the original image when the shielding unit is in the first and second states, respectively.Type: ApplicationFiled: April 8, 2013Publication date: October 10, 2013Applicant: Panasonic CorporationInventors: Keiji SUGIYAMA, Kenichi KASAZUMI
-
Patent number: 8547618Abstract: A scanning type image display apparatus includes a light source unit for emitting a laser beam, a scanning mirror for scanning the laser beam two-dimensionally in a first direction and a second direction that intersects the first direction, and a control unit for controlling driving of the scanning mirror. The control unit drives the scanning mirror such that a scanning frequency in the first direction is higher than a scanning frequency in the second direction, and varies a scanning amplitude in the first direction by varying the scanning frequency in the first direction in synchronization with a period of the scanning frequency in the second direction.Type: GrantFiled: April 6, 2010Date of Patent: October 1, 2013Assignee: Panasonic CorporationInventors: Keiji Sugiyama, Kakuya Yamamoto, Tatsuo Itoh, Kenichi Kasazumi, Akira Kurozuka
-
Publication number: 20130182302Abstract: The present application discloses a see-through display device a light source configured to emit light, a projection optical system configured to project image light generated from the light; a transmissive hologram including a first surface which the image light enters from the projection optical system; and an interface configured to cause Fresnel reflection of the image light deflected by the hologram. The hologram includes a first interference fringe recorded by object light and reference light which are incident on the first surface by means of two-light flux interference. The image light incident on the first surface is deflected by the first interference fringe toward the interface. The interface reflects the image light toward the first surface.Type: ApplicationFiled: September 21, 2011Publication date: July 18, 2013Inventors: Shinichi Shikii, Kenichi Kasazumi, Keiji Sugiyama, Kakuya Yamamoto, Akira Kurozuka
-
Publication number: 20130155337Abstract: Included is a light emitting unit, an optical deflector, a control unit, and a liquid crystal panel. The optical deflector includes a first optical deflector and a second optical deflector which are arranged side by side in a direction from a light incident side to a light emitting side. A maximum light deflection angle of the first optical deflector is smaller than a maximum light deflection angle of the second optical deflector, and a maximum light deflection speed of the first optical deflector is higher than a maximum light deflection speed of the second optical deflector. The first optical deflector includes a first optical deflection layer and a second optical deflection layer stacked in the direction from the light incident side to the light emitting side. Each of the first and second optical deflection layers includes the liquid crystal deflection elements arranged in the planar state.Type: ApplicationFiled: July 13, 2012Publication date: June 20, 2013Inventors: Keiji Sugiyama, Shinichi Shikii
-
Patent number: 8446288Abstract: A light projection device, includes a movable projector section which illuminates or display information by projecting light while moving a projection position; a position detecting section which detects a position of a lost article instructed by a user; a view field detecting section which detects a view field of the user, and a controller section which controls said movable projection section based on the lost article detected by the position detecting section and the view field of the user detected by the view field detecting section, and either directly illuminates the lost article or projects guide information for guiding the user to the lost article within a view field of the user.Type: GrantFiled: September 30, 2009Date of Patent: May 21, 2013Assignee: Panasonic CorporationInventors: Tetsuro Mizushima, Kazuhisa Yamamoto, Akira Kurozuka, Kakuya Yamamoto, Keiji Sugiyama, Kenji Nakayama