Patents by Inventor Eiji Kanda
Eiji Kanda 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: 8710442Abstract: A sensing device includes a first electrode, a second electrode with a first opening portion, a light blocking layer with a second opening portion, an organic EL layer including a light emitting unit and being formed between the first electrode and the second electrode, and a light receiving unit. The light blocking layer is positioned in the first electrode or between the first electrode and the second electrode, and in plan view from the subject side, the light blocking layer overlaps the first opening portion and the second opening portion is positioned within the first opening portion, and the light receiving unit is positioned further from the subject side than the second electrode, and in plan view from the subject side, the light receiving unit is positioned within the second opening portion.Type: GrantFiled: August 29, 2013Date of Patent: April 29, 2014Assignee: Seiko Epson CorporationInventors: Eiji Kanda, Hideto Ishiguro, Tsukasa Eguchi, Tetsuji Fujita, Hidetoshi Yamamoto
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Patent number: 8704234Abstract: 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: GrantFiled: October 25, 2006Date of Patent: April 22, 2014Assignee: Seiko Epson CorporationInventors: Takehiko Kubota, Eiji Kanda, Ryoichi Nozawa
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Patent number: 8698714Abstract: To reduce the time for writing a voltage onto a gate of a driving transistor. In an initialization period, a node B is fixed to an initial voltage VINI, transistors are turned on, and a current flows into an OLED element, such that a voltage according to the current is held at the node A. Thereafter, the transistors are sequentially turned off, such that a threshold voltage of a driving transistor is held at the node A. In a writing period, a transistor is turned on and a data signal X-j is supplied, such that a voltage of the node B varies by the amount according to the current flowing into the OLED element. The voltage of the node A varies from the threshold voltage by the amount which is obtained by dividing the voltage variation by a capacitance ratio. In a light-emitting period, the transistor is turned on, such that a current according to the voltage of the node A flows into the OLED element.Type: GrantFiled: December 4, 2009Date of Patent: April 15, 2014Assignee: Seiko Epson CorporationInventors: Tokuro Ozawa, Toshiyuki Kasai, Eiji Kanda, Ryoichi Nozawa
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Patent number: 8692259Abstract: 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: April 11, 2012Date of Patent: April 8, 2014Assignee: Seiko Epson CorporationInventors: Takehiko Kubota, Eiji Kanda, Ryoichi Nozawa
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Publication number: 20140070100Abstract: A sensing device includes a first electrode, a second electrode with a first opening portion, a light blocking layer with a second opening portion, an organic EL layer including a light emitting unit and being formed between the first electrode and the second electrode, and a light receiving unit. The light blocking layer is positioned in the first electrode or between the first electrode and the second electrode, and in plan view from the subject side, the light blocking layer overlaps the first opening portion and the second opening portion is positioned within the first opening portion, and the light receiving unit is positioned further from the subject side than the second electrode, and in plan view from the subject side, the light receiving unit is positioned within the second opening portion.Type: ApplicationFiled: August 29, 2013Publication date: March 13, 2014Applicant: SEIKO EPSON CORPORATIONInventors: Eiji KANDA, Hideto ISHIGURO, Tsukasa EGUCHI, Tetsuji FUJITA, Hidetoshi YAMAMOTO
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Patent number: 8552378Abstract: A light emitting unit is positioned to the subject side than a light receiving unit in a sensing device. The light emitting unit includes a light emitting layer, a first electrode, a second electrode which has an opening, and an insulating layer that is provided at a position that corresponds to the opening portion of the second electrode and that partially insulates the first electrode and the second electrode. The light receiving unit includes a light receiving element that receives reflected light. The light blocking layer is provided at a position that corresponds to the opening portion, and an opening portion is formed thereon. In a case when viewed in a plan view, the light blocking layer overlaps the opening portion, and a light receiving face of the light receiving element is positioned within the opening.Type: GrantFiled: April 4, 2012Date of Patent: October 8, 2013Assignee: Seiko Epson CorporationInventors: Eiji Kanda, Hideto Ishiguro, Tsukasa Eguchi, Tetsuji Fujita, Hidetoshi Yamamoto
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Patent number: 8416212Abstract: An electro-optical device, which has a display area and a plurality of sensing areas for detecting capacitance in the display area, includes a black matrix that is provided in the vicinities of display pixels in the display area, pixel electrodes that individually form the display pixels, a common electrode, a liquid crystal layer that is interposed between the pixel electrodes and the common electrode, a plurality of pixel circuits that individually drive the pixel electrodes, a capacitance detection element that is provided in a corresponding one of the sensing areas to convert a change in thickness of the liquid crystal layer caused by external pressure into a change in capacitance, and a sensing circuit that outputs a sensing signal on the basis of the change in capacitance obtained by the capacitance detection element. The capacitance detection element overlaps the black matrix in planar view.Type: GrantFiled: November 14, 2008Date of Patent: April 9, 2013Assignee: Sony CorporationInventors: Tsukasa Eguchi, Eiji Kanda
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Patent number: 8319750Abstract: A display device includes: a first substrate and a second substrate that face each other; electro-optical elements that are interposed between the first substrate and the second substrate; light detecting units that are provided between the first substrate and the second substrate and output first detection signals having levels corresponding to the amount of incident light; and capacitance detecting units that include capacitive elements each having a first electrode and a second electrode provided between the first substrate and the second substrate, output second detection signals having levels corresponding to the capacitance values of the capacitive elements, and are provided separately from the light detecting units.Type: GrantFiled: April 21, 2009Date of Patent: November 27, 2012Assignee: Sony CorporationInventors: Hitoshi Ota, Eiji Kanda
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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: 20120256089Abstract: A light emitting unit is positioned to the subject side than a light receiving unit in a sensing device. The light emitting unit includes a light emitting layer, a first electrode, a second electrode which has an opening, and an insulating layer that is provided at a position that corresponds to the opening portion of the second electrode and that partially insulates the first electrode and the second electrode. The light receiving unit includes a light receiving element that receives reflected light. The light blocking layer is provided at a position that corresponds to the opening portion, and an opening portion is formed thereon. In a case when viewed in a plan view, the light blocking layer overlaps the opening portion, and a light receiving face of the light receiving element is positioned within the opening.Type: ApplicationFiled: April 4, 2012Publication date: October 11, 2012Applicant: SEIKO EPSON CORPORATIONInventors: Eiji KANDA, Hideto ISHIGURO, Tsukasa EGUCHI, Tetsuji FUJITA, Hidetoshi YAMAMOTO
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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: 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: 8144083Abstract: A method for driving a light-emitting device in which a plurality of pixel circuits are arranged in correspondence with the intersection of a plurality of scanning lines and a plurality data lines, the pixel circuit having a light-emitting element and a driving transistor that controls the current amount of a driving current flowing the light-emitting device, comprises repeating the process within unit period including a first period and a second period following the first period, wherein the second period process includes selecting one scanning line of the plurality of scanning lines, and supplying and holding a data voltage corresponding to the luminance of the light-emitting element to a gate of the driving transistor via the data lines with respect to the plurality pixel circuits connected the selected scanning lines, and wherein the first period process includes selecting two or more scanning lines of the plurality of scanning lines, and correcting the unbalance of the driving current output from the driType: GrantFiled: May 24, 2006Date of Patent: March 27, 2012Assignee: Seiko Epson CorporationInventors: Kasori Takahashi, Eiji Kanda, Tokuro Ozawa
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Patent number: 8089476Abstract: A liquid crystal device includes a plurality of selection lines, a plurality of signal lines, a plurality of pixel portions, a plurality of photosensor portions, a plurality of first power lines, and a plurality of sense lines. The plurality of selection lines are provided in a line direction. The plurality of signal lines are provided in a column direction. The plurality of pixel portions are provided at positions corresponding to intersections of the selection lines and the signal lines. The plurality of photosensor portions are provided in correspondence with a portion of the plurality of pixel portions. The plurality of first power lines are provided in the line direction. The plurality of sense lines are provided in the column direction. Each of the plurality of pixel portions includes a first switching element and a liquid crystal.Type: GrantFiled: July 25, 2008Date of Patent: January 3, 2012Assignee: Sony CorporationInventors: Hideto Ishiguro, Eiji Kanda, Hitoshi Ota
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Patent number: 8072396Abstract: A unit circuit includes an electro-optical element, a first capacitive element, a second capacitive element, a third capacitive element, a drive transistor, a first switching element, an initialization unit, and a compensation unit. The electro-optical element emits an amount of light in accordance with a magnitude of a drive current. The first capacitive element includes a first electrode and a second electrode, the first electrode is electrically connected to a first node, and the second electrode is capable of receiving a fixed potential. The second capacitive element includes a third electrode and a fourth electrode, the third electrode is electrically connected to a second node, and the fourth electrode is capable of receiving a fixed potential. The third capacitive element includes a fifth electrode and a sixth electrode, the fifth electrode is electrically connected to the first node, and the sixth electrode is electrically connected to the second node.Type: GrantFiled: May 17, 2007Date of Patent: December 6, 2011Assignee: Seiko Epson CorporationInventors: Takayuki Kitazawa, Eiji Kanda
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Patent number: 7928935Abstract: An electro-optical device includes a plurality of data lines, scan lines, and unit circuits. Each data line is supplied with a data potential corresponding to a gray scale, and each scan line is supplied with a scan signal defining a writing period. Each unit circuit includes a drive transistor generating a driving current, an electro-optical element displaying a gray scale, a capacitive element having first and second electrodes, an electric supply line, which extends in a direction so as not to intersect the scan line, connected to the second electrode in an initialization period other than the writing period, a first switching element connecting the gate and drain of the drive transistor during at least the initialization period, and a second switching element controlling an electrical connection between the data line and the first electrode based on the scan signal.Type: GrantFiled: August 17, 2007Date of Patent: April 19, 2011Assignee: Seiko Epson CorporationInventor: Eiji Kanda
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Publication number: 20110068707Abstract: 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: December 3, 2010Publication date: March 24, 2011Applicant: Seiko Epson CorporationInventors: Takehiko Kubota, Eiji Kanda, Ryoichi Nozawa
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Patent number: 7902559Abstract: A light emitting device includes a substrate having transparency, a light emitting element that emits light at least to the substrate side, and a light detecting element that is formed between the light emitting element and the substrate. The light detecting element is formed along an outer frame of the light emitting element in a plan view.Type: GrantFiled: November 12, 2008Date of Patent: March 8, 2011Assignee: Seiko Epson CorporationInventors: Tsukasa Eguchi, Hiroaki Jo, Eiji Kanda, Toshiyuki Kasai, Atsushi Ito
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Publication number: 20110031882Abstract: 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 electrical 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 including a first portion extending in a first direction and a second portion extending in a second direction that crosses the first direction. The connecting portion being positioned in an area between the first and second power supply lines in plan view.Type: ApplicationFiled: October 25, 2010Publication date: February 10, 2011Applicant: SEIKO EPSON CORPORATIONInventors: Takehiko KUBOTA, Eiji Kanda, Ryoichi Nozawa