Patents by Inventor Takehiko Kubota
Takehiko Kubota 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: 8552653Abstract: An electro-optical device includes a first pixel circuit which is disposed so as to correspond to each intersection between a scanning line and a first data line, a second pixel circuit which is disposed so as to correspond to each intersection between a scanning line and a second data line, a signal line, a selection section, a driving circuit. In a first selection period, the selection section is operated such that the first data line and the second data line are electrically connected to the signal line. In the second selection period, the selection section is operated such that the second data line is electrically connected to the signal line. In a writing period, the first data potential is supplied to the first pixel circuit and the second data potential is supplied to the second pixel circuit.Type: GrantFiled: November 14, 2011Date of Patent: October 8, 2013Assignee: Seiko Epson CorporationInventors: Takayuki Kitazawa, Takehiko Kubota, Toshiyuki Kasai
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Publication number: 20130257698Abstract: An electro-optical device includes one or more control lines that include a scanning line, a data line and a pixel circuit. The pixel circuit has a drive transistor, a write-in transistor with a gate which is electrically connected to the scanning line, a light-emitting element that emits light at a brightness that depends on the size of a current that is supplied through the drive transistor, and a control line which overlaps the gate of the drive transistor when viewed from a direction that is perpendicular to a surface of a substrate on which the pixel circuit is formed is included in the one or more control lines.Type: ApplicationFiled: March 21, 2013Publication date: October 3, 2013Applicant: SEIKO EPSON CORPORATIONInventors: Takashi TOYA, Takehiko KUBOTA
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Publication number: 20130250380Abstract: A virtual image display apparatus includes an organic EL device that outputs light having one kind of wavelength band, a light guide member, and a reflection-type volume hologram that is disposed on a first face of the light guide member and diffracts and reflects light of a predetermined wavelength band of the light that has entered. The organic EL device includes an optical resonance structure that causes the above-mentioned light of one-kind wavelength band to resonate.Type: ApplicationFiled: February 14, 2013Publication date: September 26, 2013Applicant: SEIKO EPSON CORPORATIONInventors: Yoichi FUJIKAWA, Osamu YOKOYAMA, Takehiko KUBOTA
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Patent number: 8487313Abstract: An emissive device includes a substrate; a switching element disposed on a surface of the substrate; an insulating layer covering the switching element; a contact hole disposed in the insulating layer; a first electrode disposed on a surface of the insulating layer and electrically connected to the switching element via the contact hole in the insulating layer; a second electrode disposed at a side opposite the substrate with respect to the first electrode; a luminescent layer disposed between the first electrode and the second electrode; and a light shield disposed at a side from which light from the luminescent layer emerges and having a portion covering the contact hole when viewed in a direction perpendicular to the substrate.Type: GrantFiled: March 31, 2010Date of Patent: July 16, 2013Assignee: Seiko Epson CorporationInventor: Takehiko Kubota
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Publication number: 20130063815Abstract: In an optical system, first green light reflected by a first diffractive optical element propagates in a left direction by repeating total reflection within a first light guide unit, is reflected by a third diffractive optical element, and is guided to a left eye. First red light reflected by a fifth diffractive optical element propagates in a left direction by repeating total reflection within a second light guide unit, is reflected by a seventh diffractive optical element, and is guided to a left eye. First blue light reflected by a ninth diffractive optical element is reflected by an eleventh diffractive optical element, and is guided to a left eye.Type: ApplicationFiled: August 22, 2012Publication date: March 14, 2013Applicant: SEIKO EPSON CORPORATIONInventor: Takehiko KUBOTA
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Patent number: 8395724Abstract: A display device includes an illumination medium, a display medium, and a conductor. The illumination medium includes a light-emitting element and a connection portion. The light-emitting element includes a first electrode and a second electrode and emits light with the use of power supplied between the first electrode and the second electrode. The connection portion is electrically connected to at least one of the first electrode and the second electrode. The display medium includes a terminal, relay wiring, and an electro-optical element. The relay wiring is electrically connected to the terminal. The electro-optical element controls light that is irradiated by and comes from the illumination medium according to electric energy supplied to the electro-optical element. The conductor electrically connects the relay wiring and the connection portion.Type: GrantFiled: February 24, 2010Date of Patent: March 12, 2013Assignee: Seiko Epson CorporationInventor: Takehiko Kubota
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Patent number: 8379062Abstract: An electro-optical device includes: a plurality of pixel circuits, each of which is disposed at a position corresponding to each intersection position between a plurality of scanning lines and signal lines; and an initialization line which supplies an initialization potential to the plurality of pixel circuits, wherein each of the plurality of pixel circuits includes: an electro-optical element which has a gray scale in accordance with a current amount of a driving current; a storage capacitor of which a voltage across opposite ends is set in accordance with a potential of the signal line; an initializer which initializes the voltage across opposite ends of the storage capacitor by electrically connecting the initialization line to the storage capacitor; a driving transistor which controls the current amount of the driving current in accordance with the voltage of the storage capacitor; a first conductor which is electrically connected to a gate of the driving transistor and overlaps with the initialization lType: GrantFiled: June 2, 2009Date of Patent: February 19, 2013Assignee: Seiko Epson CorporationInventor: Takehiko Kubota
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Patent number: 8373737Abstract: A light emitting substrate has a plurality of first light emitting portions arranged in a main scanning direction and a second light emitting portion disposed in a direction intersecting the main scanning direction with respect to the array of the plurality of first light emitting portions. A lens array has a plurality of first lenses, each of which is disposed to face each of the plurality of first light emitting portions, and a second lens for the second light emitting portion. A direction of the emitted light from the second light emitting portion has a slope with respect to a straight line which extends perpendicularly from a light emitting face of the corresponding second light emitting portion.Type: GrantFiled: April 1, 2011Date of Patent: February 12, 2013Assignee: Seiko Epson CorporationInventor: Takehiko Kubota
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Patent number: 8335041Abstract: A head mounted display includes a display unit, a concave mirror, an optical unit that is arranged between the display unit and the concave mirror, transmits a part of incident light from the display unit and reflects the other part of the incident light from the display unit, a first optical system that guides light reflected by the concave mirror to the left eye, and a second optical system that guides light reflected by the optical unit to the right eye. In the head mounted display, on the concave mirror, a right end is closer to the display unit in comparison with a left end. Further, the curvature of the concave mirror at the right end is larger than the curvature of the concave mirror at the left end.Type: GrantFiled: May 11, 2011Date of Patent: December 18, 2012Assignee: Seiko Epson CorporationInventor: Takehiko Kubota
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Publication number: 20120286659Abstract: A light-emitting device includes a drive transistor that controls a current to be supplied to a light-emitting element from a power supply line, an element continuity portion that electrically connects the drive transistor with the light-emitting element, an initializing transistor that is turned ON to diode-connect the drive transistor, and a connecting portion that electrically connects the drive transistor with the initializing transistor. The power supply line includes a first portion extending in a predetermined direction. The element continuity portion and the connecting portion are formed from the same layer as that of the power supply line and are located on one side along the width of the first portion across the drive transistor.Type: ApplicationFiled: July 24, 2012Publication date: November 15, 2012Applicant: SEIKO EPSON CORPORATIONInventors: Takehiko Kubota, Eiji Kanda, Ryoichi Nozawa
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Publication number: 20120199871Abstract: A light-emitting device includes a power feeding line to which a predetermined voltage is supplied; a light-emitting element formed of a first electrode, a second electrode, and a light-emitting layer interposed between the first electrode and the second electrode; and a driving transistor that controls the amount of current supplied to the light-emitting element from the power feeding line. The power feeding line includes a portion interposed between the first electrode and the driving transistor.Type: ApplicationFiled: April 11, 2012Publication date: August 9, 2012Applicant: SEIKO EPSON CORPORATIONInventors: Takehiko KUBOTA, Eiji KANDA, Ryoichi NOZAWA
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Patent number: 8198636Abstract: A light-emitting device includes a power feeding line to which a predetermined voltage is supplied; a light-emitting element formed of a first electrode, a second electrode, and a light-emitting layer interposed between the first electrode and the second electrode; and a driving transistor that controls the amount of current supplied to the light-emitting element from the power feeding line. The power feeding line includes a portion interposed between the first electrode and the driving transistor.Type: GrantFiled: December 3, 2010Date of Patent: June 12, 2012Assignee: Seiko Epson CorporationInventors: Takehiko Kubota, Eiji Kanda, Ryoichi Nozawa
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Publication number: 20120119667Abstract: An electro-optical device includes a first pixel circuit which is disposed so as to correspond to each intersection between a scanning line and a first data line, a second pixel circuit which is disposed so as to correspond to each intersection between a scanning line and a second data line, a signal line, a selection section, a driving circuit. In a first selection period, the selection section is operated such that the first data line and the second data line are electrically connected to the signal line. In the second selection period, the selection section is operated such that the second data line is electrically connected to the signal line. In a writing period, the first data potential is supplied to the first pixel circuit and the second data potential is supplied to the second pixel circuit.Type: ApplicationFiled: November 14, 2011Publication date: May 17, 2012Applicant: SEIKO EPSON CORPORATIONInventors: Takayuki KITAZAWA, Takehiko KUBOTA, Toshiyuki KASAI
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Publication number: 20120104401Abstract: A light-emitting device includes a drive transistor for controlling the quantity of current supplied to a light-emitting element, a capacitor element electrically connected to a gate electrode of the drive transistor, and an electrical continuity portion for electrically connecting the drive transistor and the light-emitting element, these elements being disposed on a substrate. The electrical continuity portion is disposed on the side opposite to the capacitor element with the drive transistor disposed therebetween.Type: ApplicationFiled: January 10, 2012Publication date: May 3, 2012Applicant: SEIKO EPSON CORPORATIONInventors: Takehiko KUBOTA, Eiji KANDA, Ryoichi NOZAWA
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Patent number: 8167094Abstract: Provided is an elevator apparatus including a first electromagnetic switch and a second electromagnetic switch provided between a first electromagnetic coil and a second electromagnetic coil of a first brake device and a second brake device and a power source. The brake control section includes: a first electromagnetic coil control switch provided between the first electromagnetic coil and a ground section; a second electromagnetic coil control switch provided between the second electromagnetic coil and the ground section; a first processing section for opening and closing the first electromagnetic switch and the first electromagnetic coil control switch in response to a braking operation command issued from an operation control section; and a second processing section for opening and closing the second electromagnetic switch and the second electromagnetic coil control switch in response to the braking operation command.Type: GrantFiled: April 26, 2007Date of Patent: May 1, 2012Assignee: Mitsubishi Electric CorporationInventors: Takaharu Ueda, Takehiko Kubota, Akihiro Chida, Satoru Takahashi, Rikio Kondo
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Publication number: 20120098874Abstract: A pixel circuit includes a first light emitting element having a first opposite electrode connected to a first power line, a common electrode and a parasitic capacitance C1; and a second light emitting element having a second opposite electrode connected to a second power line, a common electrode and a parasitic capacitance C2. A first power potential is supplied to the first power line, and a second power potential is supplied to the second power line. The first and second power potentials change by increasing with a constant gradient from a low first potential to a high second potential in turns, and the first and second light emitting elements emit light in turns by flowing current from the parasitic capacitance C1 or C2 to the other light emitting element.Type: ApplicationFiled: October 6, 2011Publication date: April 26, 2012Applicant: SEIKO EPSON CORPORATIONInventor: Takehiko KUBOTA
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Publication number: 20120098805Abstract: A pixel circuit includes a first light emitting device including a common electrode and a first opposed electrode connected to a first power supply line, and a second light emitting device including the common electrode and a second opposed electrode connected to the second power supply line. A first potential and a second potential are alternately supplied to a first power supply potential supplied to the first power supply line and a second power supply potential supplied to the second power supply line, and thus the first light emitting device and the second light emitting device alternately emit light.Type: ApplicationFiled: October 6, 2011Publication date: April 26, 2012Applicant: SEIKO EPSON CORPORATIONInventors: Takehiko Kubota, Shin Fujita
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Patent number: 8159420Abstract: An electro-optical device that includes: a first scanning line; a first data line; and a first unit circuit. The first unit circuit includes a driving transistor that sets a driving current in accordance with a voltage of a gate of the driving transistor, an electro-optical element that is driven by the driving current, a first capacitative element that has a first electrode and a second electrode, and a second capacitative element that has a third electrode and a fourth electrode. The first electrode is connected to the gate of the driving transistor, whereas the third electrode is connected to either the first electrode or the second electrode. At least a part of the second capacitative element is arranged between the first data line and the first capacitative element in a layout of the first unit circuit.Type: GrantFiled: September 14, 2007Date of Patent: April 17, 2012Assignee: Seiko Epson CorporationInventors: Kasori Takahashi, Takehiko Kubota
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Publication number: 20120081892Abstract: A light emitting device includes a light emitting element that includes a reflection layer formed on a substrate, a light emitting layer formed on the reflection layer, and a semi-reflection layer formed on the light emitting layer, so as to transmit a portion of light from the light emitting layer and to reflect a remaining portion of the light. The light emitting element is configured as an optical resonator that causes a portion of the light outputted from the light emitting layer travelling at a predetermined angle ?, larger than 0 degrees with respect to a direction perpendicular to the reflection layer, to resonate between the reflection layer and the semi-reflection layer and extracts the light from the side of the semi-reflection layer.Type: ApplicationFiled: September 9, 2011Publication date: April 5, 2012Applicant: SEIKO EPSON CORPORATIONInventor: Takehiko KUBOTA
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Publication number: 20120002131Abstract: An illumination device is a device which irradiates light to a reflection-type display panel in which a liquid crystal is sandwiched between a pair of substrates. The illumination device includes a light emitting portion formed such that an organic EL layer is sandwiched between the pair of substrates. A first electrode which is in contact with the organic EL layer includes a metal portion and a transparent portion through which light can transmit. Light does not transmit through the metal portion provided at the viewing side. Further, the illumination device includes a microlens array arranged so as to cover the light emitting portion at the viewing side of the light emitting portion.Type: ApplicationFiled: June 17, 2011Publication date: January 5, 2012Applicant: SEIKO EPSON CORPORATIONInventor: Takehiko KUBOTA