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).

  • Publication number: 20220276529
    Abstract: 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: Application
    Filed: May 18, 2022
    Publication date: September 1, 2022
    Applicant: SEIKO EPSON CORPORATION
    Inventor: Shinsuke FUJIKAWA
  • Patent number: 11428999
    Abstract: An electro-optical device includes: a liquid crystal panel; a particle aligned type anisotropic conductive film having a plurality of electrically conductive particles that are arranged in a state of being aligned along a first direction and a second direction intersecting with the first direction; and a printed circuit board coupled to a connection terminal portion of the liquid crystal panel via the particle aligned type anisotropic conductive film, wherein the connection terminal portion includes a plurality of connection terminals, a plurality of recessed portions that are arranged in a state of being aligned along a third direction and a fourth direction intersecting with the third direction are formed on a surface of the connection terminal, and at least one of the first direction and the second direction along which the electrically conductive particles are arranged is different in arrangement direction from both the third direction and the fourth direction.
    Type: Grant
    Filed: August 25, 2021
    Date of Patent: August 30, 2022
    Assignee: SEIKO EPSON CORPORATION
    Inventor: Shinsuke Fujikawa
  • Publication number: 20220262288
    Abstract: A substrate for an electro-optical device includes a first mounting terminal and a second mounting terminal connected to a sensor element. The substrate for an electro-optical device includes a first resistive element including a first end electrically connected to the first mounting terminal and a second end electrically connected to the second mounting terminal, a second resistive element including a first end electrically connected to the first resistive element and a second end electrically connected to the second mounting terminal, and a third mounting terminal electrically connected to the second end of the first resistive element and the first end of the second resistive element.
    Type: Application
    Filed: February 14, 2022
    Publication date: August 18, 2022
    Applicant: SEIKO EPSON CORPORATION
    Inventor: Shinsuke FUJIKAWA
  • Patent number: 11402712
    Abstract: In an electro-optical device, a transmission gate includes two or more n-channel type transistors controlled by a positive logic selection signal line and a p-channel type transistor controlled by a negative logic selection signal line. Each of the selection signal lines includes a main line part extending in a first direction and a branch line part extending in a second direction, and the n-channel type transistors and the p-channel type transistor are alternately arranged along the second direction.
    Type: Grant
    Filed: March 5, 2021
    Date of Patent: August 2, 2022
    Assignee: SEIKO EPSON CORPORATION
    Inventor: Shinsuke Fujikawa
  • Patent number: 11398509
    Abstract: 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: Grant
    Filed: June 5, 2020
    Date of Patent: July 26, 2022
    Assignee: SEIKO EPSON CORPORATION
    Inventor: Shinsuke Fujikawa
  • Patent number: 11393377
    Abstract: An electro-optical device is provided that includes a pixel circuit disposed corresponding to each of intersections of a scanning line and eight signal lines, an image signal circuit, and a control circuit. The image signal circuit includes a write switch provided for each of the eight signal lines, and in a horizontal scanning period, an image signal is sequentially supplied to the eight signal lines in eight supply periods based on selection signals sequentially selecting eight writing switches. The control circuit controls the selection signals so that a time length of a supply period at a positive polarity time of an image signal is longer than a time length of a supply period at a negative polarity time.
    Type: Grant
    Filed: April 14, 2021
    Date of Patent: July 19, 2022
    Assignee: SEIKO EPSON CORPORATION
    Inventor: Shinsuke Fujikawa
  • Patent number: 11385490
    Abstract: In an electro-optical device, a temperature detection element is provided on a first substrate having a pixel region, on which a plurality of pixel electrodes are provided, in a position overlapping a light shielding portion that is formed on a second substrate so as to surround the pixel region. Further, the first substrate is provided with an electrostatic protection circuit that includes a semiconductor element and is electrically coupled to the temperature detection element. The semiconductor element is disposed in a position which is farther distanced from the center of the pixel region than the temperature detection element is, and at which a temperature is lower than a temperature at a position in which the temperature detection element is provided.
    Type: Grant
    Filed: July 22, 2020
    Date of Patent: July 12, 2022
    Assignee: SEIKO EPSON CORPORATION
    Inventor: Shinsuke Fujikawa
  • Patent number: 11366352
    Abstract: 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: Grant
    Filed: April 29, 2021
    Date of Patent: June 21, 2022
    Assignee: SEIKO EPSON CORPORATION
    Inventor: Shinsuke Fujikawa
  • Patent number: 11367408
    Abstract: An electro-optical device includes a first switch provided between an input node supplied with a data signal and a first data line, the first switch being configured to be turned ON or OFF by a first control signal, a second switch provided between the input node and a second data line, the second switch being configured to be turned ON or OFF by the second control signal, a sequential output circuit configured to output a first pulse, and a second pulse exclusive of the first pulse, logical operational first logical operation circuit configured to acquire a first logical product signal of the first control signal and the first pulse, and a second logical product signal of the second control signal and the second pulse, and a second logical operation circuit configured to generate a logical sum signal of the first logical product signal and the second logical product signal.
    Type: Grant
    Filed: November 10, 2020
    Date of Patent: June 21, 2022
    Assignee: SEIKO EPSON CORPORATION
    Inventor: Shinsuke Fujikawa
  • Publication number: 20220178765
    Abstract: A temperature detection device includes: a temperature detection element; a constant current circuit configured to supply a driving current to the temperature detection element; and a temperature signal generation unit configured to convert a voltage of the temperature detection element when the driving current is supplied to the temperature detection element into a temperature signal. The temperature detection device includes a driving current monitoring circuit configured to monitor change in the driving current outputted from the constant current circuit. The driving current monitoring circuit includes a current-voltage conversion unit voltage of which changes corresponding to a change in the driving current, and outputs by a switching circuit the voltage when the driving current is supplied from the constant current circuit to the current-voltage conversion unit.
    Type: Application
    Filed: December 3, 2021
    Publication date: June 9, 2022
    Applicant: SEIKO EPSON CORPORATION
    Inventor: Shinsuke FUJIKAWA
  • Patent number: 11333910
    Abstract: 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: Grant
    Filed: November 19, 2019
    Date of Patent: May 17, 2022
    Assignee: SEIKO EPSON CORPORATION
    Inventor: Shinsuke Fujikawa
  • Publication number: 20220066252
    Abstract: An electro-optical device includes: a liquid crystal panel; a particle aligned type anisotropic conductive film having a plurality of electrically conductive particles that are arranged in a state of being aligned along a first direction and a second direction intersecting with the first direction; and a printed circuit board coupled to a connection terminal portion of the liquid crystal panel via the particle aligned type anisotropic conductive film, wherein the connection terminal portion includes a plurality of connection terminals, a plurality of recessed portions that are arranged in a state of being aligned along a third direction and a fourth direction intersecting with the third direction are formed on a surface of the connection terminal, and at least one of the first direction and the second direction along which the electrically conductive particles are arranged is different in arrangement direction from both the third direction and the fourth direction.
    Type: Application
    Filed: August 25, 2021
    Publication date: March 3, 2022
    Applicant: SEIKO EPSON CORPORATION
    Inventor: Shinsuke FUJIKAWA
  • Publication number: 20220057666
    Abstract: An electro-optical device includes a liquid crystal panel, and a printed circuit board that is electrically coupled to a terminal portion of the liquid crystal panel by electrically conductive particles arranged in a state of being aligned as viewed in plan view, wherein the terminal portion has a plurality of panel terminals arranged along a first direction extending along one side of the liquid crystal panel, the panel terminal has a long side extending along a second direction obliquely intersecting with the first direction and a short side extending along a direction intersecting with the second direction, and an arrangement direction of the electrically conductive particles is arranged along a third direction intersecting with the second direction.
    Type: Application
    Filed: August 17, 2021
    Publication date: February 24, 2022
    Applicant: SEIKO EPSON CORPORATION
    Inventor: Shinsuke FUJIKAWA
  • Publication number: 20220057669
    Abstract: An electro-optical panel including a display region includes a first terminal group including a plurality of first terminals arranged along a first side of a liquid crystal panel; and a second terminal group disposed between the first terminal group and the display region and including a plurality of second terminals arranged along the first side, in which the number of the plurality of second terminals is smaller than the number of the plurality of first terminals.
    Type: Application
    Filed: August 17, 2021
    Publication date: February 24, 2022
    Applicant: SEIKO EPSON CORPORATION
    Inventor: Shinsuke FUJIKAWA
  • Publication number: 20220011621
    Abstract: Provided is a liquid crystal device that includes a liquid crystal panel and a holder that holds the liquid crystal panel. The holder includes a placement part on which the liquid crystal panel is placed, and a fixing part that is provided at the placement part and fixed to the liquid crystal panel via an adhesive. The fixing part includes a recessed part, and the placement part includes a first protruding part that serves as a partition between the fixing part, and an element substrate and a counter substrate.
    Type: Application
    Filed: July 7, 2021
    Publication date: January 13, 2022
    Applicant: SEIKO EPSON CORPORATION
    Inventor: Shinsuke FUJIKAWA
  • Patent number: 11217134
    Abstract: In a temperature detection circuit of an electro-optical device, an electrostatic protection circuit includes a first wiring line, a first transistor provided with a first source/drain region electrically connected to the first wiring line, and a second wiring line electrically connected to a second source/drain region of the first transistor. A temperature detection element includes diodes electrically connected in series between the first wiring line and the second wiring line. A compensation circuit includes a second transistor, a constant potential Vc is applied to the first source/drain region of the second transistor, and a gate electrode and the second source/drain region of the second transistor are electrically connected to the first wiring line.
    Type: Grant
    Filed: October 1, 2020
    Date of Patent: January 4, 2022
    Assignee: SEIKO EPSON CORPORATION
    Inventor: Shinsuke Fujikawa
  • Patent number: 11199747
    Abstract: An electro-optical device includes an electro-optical panel in which a frame-shaped sealing member is provided between a first substrate and a second substrate, a third substrate facing the second substrate on a side opposite from the first substrate, and a bonding member that adheres the second substrate and the third substrate to each other. The bonding member is frame-shaped and a width thereof is narrower than a width of the sealing member. In plan view, the bonding member extends at a position closer to a pixel region than a center, in the width direction, of the sealing member. Therefore, an extending length of the bonding member can be shortened and a fixing area between the second substrate and the third substrate can be reduced, and thus, stress acting on the second substrate from the third substrate can be reduced.
    Type: Grant
    Filed: September 30, 2020
    Date of Patent: December 14, 2021
    Assignee: SEIKO EPSON CORPORATION
    Inventor: Shinsuke Fujikawa
  • Publication number: 20210368143
    Abstract: Provided is an electro-optical device including an electro-optical panel that includes a display region, a holder that holds the electro-optical panel, a first temperature detecting element that is disposed on the electro-optical panel and detects the temperature of the electro-optical panel, and a second temperature detecting element that is disposed on the holder and detects the temperature of the holder. When four quadrants are defined by an X axis line passing through a center of the display region and a Y axis line passing through the center of the display region and orthogonal to the X axis line, the first temperature detecting element and the second temperature detecting element are disposed in the same quadrant.
    Type: Application
    Filed: May 20, 2021
    Publication date: November 25, 2021
    Applicant: SEIKO EPSON CORPORATION
    Inventor: Shinsuke FUJIKAWA
  • Patent number: 11170676
    Abstract: 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: Grant
    Filed: September 28, 2020
    Date of Patent: November 9, 2021
    Assignee: SEIKO EPSON CORPORATION
    Inventor: Shinsuke Fujikawa
  • Publication number: 20210327327
    Abstract: An electro-optical device is provided that includes a pixel circuit disposed corresponding to each of intersections of a scanning line and eight signal lines, an image signal circuit, and a control circuit. The image signal circuit includes a write switch provided for each of the eight signal lines, and in a horizontal scanning period, an image signal is sequentially supplied to the eight signal lines in eight supply periods based on selection signals sequentially selecting eight writing switches. The control circuit controls the selection signals so that a time length of a supply period at a positive polarity time of an image signal is longer than a time length of a supply period at a negative polarity time.
    Type: Application
    Filed: April 14, 2021
    Publication date: October 21, 2021
    Applicant: SEIKO EPSON CORPORATION
    Inventor: Shinsuke FUJIKAWA