Patents by Inventor Shinsuke Fujikawa
Shinsuke Fujikawa 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: 20200388639Abstract: Provided is an electro-optical device including a plurality of pixel electrodes arranged in a display region, a first transistor that captures a pulse supplied to a source node by using a clock signal supplied to a gate node and outputs the pulse from the drain node, a second transistor to which the pulse output from the drain node is input, and a capacitance element having one end coupled to the drain node and another end held at a predetermined potential. In the capacitance element, an interlayer insulating film is sandwiched between a first peripheral electrode formed of a same layer as the plurality of pixel electrodes and a wiring formed of a predetermined electrode layer, and the wiring includes a portion overlapping the second transistor in plan view.Type: ApplicationFiled: June 5, 2020Publication date: December 10, 2020Applicant: SEIKO EPSON CORPORATIONInventor: Shinsuke FUJIKAWA
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Patent number: 10859882Abstract: A liquid crystal apparatus as an electro-optical device includes a TFT including a semiconductor layer and a gate electrode, a scan line electrically connected to the gate electrode and provided in a layer different from a layer where the gate electrode is provided, a capacitance line, and a conductive light shielding film electrically connected to the capacitance line. The light shielding film is provided in a layer between the gate electrode and the scan line, and in a plan view, overlaps with at least a part of a low-concentration drain region of the semiconductor layer.Type: GrantFiled: April 24, 2019Date of Patent: December 8, 2020Assignee: SEIKO EPSON CORPORATIONInventors: Toru Nimura, Hiroyuki Oikawa, Shinsuke Fujikawa
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Patent number: 10847114Abstract: An electro-optical device includes a control circuit that controls the timing of output of a precharge voltage to a data line, and changes an elapsed time from start of transition of a voltage of a scanning signal G from a selection voltage to a non-selection voltage until an output of the precharge voltage to the data line according to a polarity of a data voltage, the voltage of the scanning signal for selecting one of multiple scanning lines, the selection voltage causing a pixel transistor to turn on, the non-selection voltage causing a pixel transistor to turn off.Type: GrantFiled: December 2, 2019Date of Patent: November 24, 2020Assignee: SEIKO EPSON CORPORATIONInventor: Shinsuke Fujikawa
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Patent number: 10825369Abstract: An electro-optical device includes a pre-charge circuit configured to supply a pre-charge signal to a first and second signal line at different timings based on a pre-charge control signal, and an inspection circuit configured to output, to the pre-charge circuit, an inspection control signal indicating whether a target is to be inspected in an inspection operation. The pre-charge circuit includes a first switch, an electrical coupling state between the first signal line and a pre-charge power supply line based on a first coupling control signal, a second switch, an electrical coupling state between the second signal line and the pre-charge power supply line based on a second coupling control signal, a first signal to output the first coupling control signal to the first switch, and a second signal to output the second coupling control signal to the second switch based on the inspection control signal and the pre-charge control signal.Type: GrantFiled: July 31, 2019Date of Patent: November 3, 2020Assignee: SEIKO EPSON CORPORATIONInventor: Shinsuke Fujikawa
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Publication number: 20200312890Abstract: In the electro-optical device, a gate electrode and a scanning line are electrically connected through a first contact hole disposed on the first insulating layer (interlayer insulating layer) overlapping the transistor. In a layer between the gate electrode and the scanning line, a first light shielding layer to which a constant potential is applied is disposed, and a light shielding portion electrically connected to the first light shielding layer covers a part of the semiconductor layer from both sides in a width direction. The light shielding portion includes a first portion that electrically connects the second light shielding layer and the first light shielding layer, and a second portion protruding from the first portion toward the semiconductor layer.Type: ApplicationFiled: March 25, 2020Publication date: October 1, 2020Applicant: SEIKO EPSON CORPORATIONInventors: Hiroyuki OIKAWA, Toru NIMURA, Shinsuke FUJIKAWA
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Publication number: 20200288584Abstract: An electro-optical device includes a data line selection circuit positioned on a display region side, a first terminal group, a second terminal group, a first video signal line electrically connected to a first terminal of the first terminal group, and a second video line electrically connected to a second terminal of the second terminal group. The first video signal line includes a first portion extending from the first terminal toward the second terminal group, a second portion extending from the first portion in a direction intersecting the first portion, and a third portion extending from the second portion toward the data line selection circuit. The second video signal line includes a fourth portion extending from the second terminal toward the first terminal group, a fifth portion extending from the fourth portion along the second portion, and a sixth portion extending from the fifth portion toward the data line selection circuit.Type: ApplicationFiled: March 4, 2020Publication date: September 10, 2020Applicant: SEIKO EPSON CORPORATIONInventor: Shinsuke FUJIKAWA
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Publication number: 20200271978Abstract: A liquid crystal apparatus includes a first wiring substrate on which a first driving IC is mounted, a second wiring substrate disposed to overlap the first wiring substrate, a first terminal group electrically connected to the first wiring substrate and including a terminal electrically connected to the first driving IC, a second terminal group electrically connected to the second wiring substrate and including another terminal electrically connected to the terminal, and a monitoring pad provided on the second wiring substrate and electrically connected to the other terminal.Type: ApplicationFiled: February 25, 2020Publication date: August 27, 2020Applicant: SEIKO EPSON CORPORATIONInventor: Shinsuke FUJIKAWA
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Publication number: 20200211492Abstract: An electrooptic device includes a scan line; data lines; a scan line driving circuit that selects the scan line; a data line driving circuit that supplies data signals to the data lines; a TFT that includes a gate electrode receiving gate signals for selecting the data line and has one end connected to the data line and the other end connected to the data line driving circuit; and a TFT that includes a gate electrode receiving gate signals for selecting the data line and has one end connected to the data line and the other end connected to the data line driving circuit. The gate electrode of the TFT overlaps the data line.Type: ApplicationFiled: March 12, 2020Publication date: July 2, 2020Applicant: SEIKO EPSON CORPORATIONInventor: Shinsuke FUJIKAWA
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Publication number: 20200203281Abstract: An electro-optical device includes a first FPC substrate and a second FPC substrate that overlap each other and are mounted on a terminal portion. A monitor pad electrically coupled to an output terminal of a second driving IC is provided at a substrate surface of the second FPC substrate of a substrate surface of the first FPC substrate and a substrate surface of the second FPC substrate that face each other. An opening extending through the first FPC substrate is provided in a position overlapping the monitor pad. A monitor pad electrically coupled to an output terminal of a first driving IC is provided between an opening of the first FPC substrate and the first driving IC.Type: ApplicationFiled: December 23, 2019Publication date: June 25, 2020Applicant: SEIKO EPSON CORPORATIONInventor: Shinsuke FUJIKAWA
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Publication number: 20200159053Abstract: An electro-optical device includes a scanning line, a first signal line and a second signal line, a first pixel, a second pixel, a signal line driving circuit configured to supply an image signal to the first pixel and the second pixel, a first pre-charge control signal line configured to supply a first pre-charge control signal, a second pre-charge control signal line configured to supply a second pre-charge control signal, and a pre-charge circuit disposed between the first pre-charge control signal line and the second pre-charge control signal line and configured to supply a pre-charge signal to the first signal line and the second signal line, in which the pre-charge circuit includes a first switching unit configured to supply the pre-charge signal to the first signal line and a second switching unit configured to supply the pre-charge signal to the second signal line.Type: ApplicationFiled: November 19, 2019Publication date: May 21, 2020Applicant: SEIKO EPSON CORPORATIONInventor: Shinsuke FUJIKAWA
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Publication number: 20200160804Abstract: An electro-optical device includes a first signal line, a second signal line, and a third signal line, a signal line drive circuit configured to supply a first image signal, a polarity of which is inverted with reference to a predetermined voltage in a predetermined cycle, to the first signal line in a first writing period, supply a second image signal to the second signal line in a second writing period, and supply a third image signal to the third signal line in a third writing period, a pre-charge circuit that includes a one-channel type transistor and is configured to supply a pre-charge signal to the third signal line in a pre-charge period overlapping the second writing period, and a timing control circuit configured to change a start timing of the pre-charge period in accordance with a polarity of the first image signal.Type: ApplicationFiled: November 18, 2019Publication date: May 21, 2020Applicant: SEIKO EPSON CORPORATIONInventor: Shinsuke FUJIKAWA
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Patent number: 10636374Abstract: An electrooptic device includes a scan line; data lines; a scan line driving circuit that selects the scan line; a data line driving circuit that supplies data signals to the data lines; a TFT that includes a gate electrode receiving gate signals for selecting the data line and has one end connected to the data line and the other end connected to the data line driving circuit; and a TFT that includes a gate electrode receiving gate signals for selecting the data line and has one end connected to the data line and the other end connected to the data line driving circuit. The gate electrode of the TFT overlaps the data line.Type: GrantFiled: December 14, 2018Date of Patent: April 28, 2020Assignee: SEIKO EPSON CORPORATIONInventor: Shinsuke Fujikawa
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Patent number: 10620494Abstract: In an element substrate of an electro-optical device, a semiconductor layer of a transistor has an L shape bending to overlap with both a scanning line and a data line. A first light shielding layer overlaps with a lower layer side of the semiconductor layer. A first light shielding wall and a second light shielding wall are provided on both sides of a semiconductor layer portion between a channel region and a second source/drain region (drain region) of the semiconductor layer. The first light shielding wall and the second light shielding wall to which a constant potential is applied prevent the semiconductor layer portion from being electrically affected even when the first light shielding wall and the second light shielding wall come close to the semiconductor layer portion.Type: GrantFiled: December 26, 2018Date of Patent: April 14, 2020Assignee: SEIKO EPSON CORPORATIONInventors: Hiroyuki Oikawa, Toru Nimura, Shinsuke Fujikawa
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Publication number: 20200105219Abstract: An electro-optical device includes a control circuit that controls the timing of output of a precharge voltage to a data line, and changes an elapsed time from start of transition of a voltage of a scanning signal G from a selection voltage to a non-selection voltage until an output of the precharge voltage to the data line according to a polarity of a data voltage, the voltage of the scanning signal for selecting one of multiple scanning lines, the selection voltage causing a pixel transistor to turn on, the non-selection voltage causing a pixel transistor to turn off.Type: ApplicationFiled: December 2, 2019Publication date: April 2, 2020Applicant: SEIKO EPSON CORPORATIONInventor: Shinsuke FUJIKAWA
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Patent number: 10606141Abstract: In an electrooptical device, a plurality of scanning lines extend between a first side of a display region and a scanning line driving circuit. A semiconductor sensor is provided between the scanning line driving circuit and the first side of the display region, the semiconductor sensor including a sensor semiconductor layer which is on the same layer as a semiconductor layer of a pixel transistor. The semiconductor sensor is a diode temperature sensor, and includes a plurality of diode elements (sensor elements) that are disposed along the first side of the display region and electrodes that electrically connect the plurality of diode elements.Type: GrantFiled: May 7, 2018Date of Patent: March 31, 2020Assignee: SEIKO EPSON CORPORATIONInventor: Shinsuke Fujikawa
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Publication number: 20200074954Abstract: A plurality of signal lines are classified into k signal line groups (where k is an integer equal to or greater than 2). When the k signal line groups are supplied with an image signal during a horizontal scanning period, a driving unit supplies some of the k signal line groups with a precharge signal and subsequently an image signal, and does not supply the remainder of the k signal line groups with the precharge signal and supplies the remainder of the k signal line groups with the image signal.Type: ApplicationFiled: October 25, 2019Publication date: March 5, 2020Applicant: SEIKO EPSON CORPORATIONInventors: Shinsuke FUJIKAWA, Nariya TAKAHASHI
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Publication number: 20200043392Abstract: An electro-optical device includes a pre-charge circuit configured to supply a pre-charge signal to a first and second signal line at different timings based on a pre-charge control signal, and an inspection circuit configured to output, to the pre-charge circuit, an inspection control signal indicating whether a target is to be inspected in an inspection operation. The pre-charge circuit includes a first switch, an electrical coupling state between the first signal line and a pre-charge power supply line based on a first coupling control signal, a second switch, an electrical coupling state between the second signal line and the pre-charge power supply line based on a second coupling control signal, a first signal to output the first coupling control signal to the first switch, and a second signal to output the second coupling control signal to the second switch based on the inspection control signal and the pre-charge control signal.Type: ApplicationFiled: July 31, 2019Publication date: February 6, 2020Applicant: SEIKO EPSON CORPORATIONInventor: Shinsuke FUJIKAWA
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Patent number: 10529298Abstract: An electro-optical device includes a control circuit that controls the timing of output of a precharge voltage to a data line, and changes an elapsed time from start of transition of a voltage of a scanning signal G from a selection voltage to a non-selection voltage until an output of the precharge voltage to the data line according to a polarity of a data voltage, the voltage of the scanning signal for selecting one of multiple scanning lines, the selection voltage causing a pixel transistor to turn on, the non-selection voltage causing a pixel transistor to turn off.Type: GrantFiled: September 10, 2019Date of Patent: January 7, 2020Assignee: SEIKO EPSON CORPORATIONInventor: Shinsuke Fujikawa
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Publication number: 20200005726Abstract: An electro-optical device includes a control circuit that controls the timing of output of a precharge voltage to a data line, and changes an elapsed time from start of transition of a voltage of a scanning signal G from a selection voltage to a non-selection voltage until an output of the precharge voltage to the data line according to a polarity of a data voltage, the voltage of the scanning signal for selecting one of multiple scanning lines, the selection voltage causing a pixel transistor to turn on, the non-selection voltage causing a pixel transistor to turn off.Type: ApplicationFiled: September 10, 2019Publication date: January 2, 2020Applicant: SEIKO EPSON CORPORATIONInventor: Shinsuke FUJIKAWA
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Publication number: 20190361288Abstract: In a liquid crystal device serving as an electro-optical device, a liquid crystal layer as an electro-optical element is disposed between a base material 10s as a first substrate and a base material 20s as a second substrate which are disposed to face each other via a photo-curable type seal material, the substrate 10s and the substrate 20s are transmissive and include a plurality of light-shielding patterns disposed at intervals in a seal region of the substrate 10s where the seal material is disposed, and on the substrate 10s, a semiconductor layer of a transistor included in a driving circuit for driving the electro-optical element is disposed to overlap, in plan view, with at least one of the plurality of light-shielding patterns.Type: ApplicationFiled: May 22, 2019Publication date: November 28, 2019Applicant: SEIKO EPSON CORPORATIONInventor: Shinsuke FUJIKAWA