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: 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
  • Patent number: 11151915
    Abstract: An electro-optical device includes a first video line and a second video line adjacent to each other, a first high potential line electrically coupled to the first video line via a first diode, a first low potential line electrically coupled to the first video line via a second diode, a second high potential line electrically coupled to the second video line via a third diode, and a second low potential line electrically coupled to the second video line via a fourth diode. The first diode has an anode electrically coupled to the first video line, the second diode has a cathode electrically coupled to the first video line, the third diode has an anode electrically coupled to the second video line, and the fourth diode has a cathode electrically coupled to the second video line.
    Type: Grant
    Filed: October 14, 2020
    Date of Patent: October 19, 2021
    Assignee: SEIKO EPSON CORPORATION
    Inventor: Shinsuke Fujikawa
  • Patent number: 11137647
    Abstract: 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: Grant
    Filed: February 25, 2020
    Date of Patent: October 5, 2021
    Assignee: SEIKO EPSON CORPORATION
    Inventor: Shinsuke Fujikawa
  • Publication number: 20210295758
    Abstract: Provided is an electro-optical device that includes a pixel circuit disposed corresponding to each of intersections of a plurality of scanning lines and the plurality of signal lines, and including a pixel transistor for introducing a voltage of the signal line, an image signal circuit that sequentially supplies image signals to eight signal lines in eight supply periods based on eight selection signals for sequentially selecting the plurality of signal lines in a horizontal scanning period, and a control circuit that controls the selection signals such that interval periods between the respective eight supply periods varies in accordance with a polarity of the image signal.
    Type: Application
    Filed: March 22, 2021
    Publication date: September 23, 2021
    Applicant: SEIKO EPSON CORPORATION
    Inventor: Shinsuke FUJIKAWA
  • Publication number: 20210278735
    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: Application
    Filed: March 5, 2021
    Publication date: September 9, 2021
    Applicant: SEIKO EPSON CORPORATION
    Inventor: Shinsuke FUJIKAWA
  • Patent number: 11107442
    Abstract: An electro-optical device includes a plurality of scan lines, k signal lines, a pixel that is disposed corresponding to each of intersections between the plurality of scan lines and the k signal lines, an image signal circuit configured to sequentially supply the image signal to each of the k signal lines in a horizontal scanning period, a pre-charge circuit configured to supply, in the horizontal scanning period and in a prescribed order, a pre-charge signal to a signal line of the k signal lines to which the image signal circuit has not supplied the image signal yet; and a control circuit configured to set a first supply period of the k supply periods, during which the image signal is sequentially supplied to each of the k signal lines, to be longer than prescribed supply periods excluding the first supply period of the k supply periods.
    Type: Grant
    Filed: May 23, 2019
    Date of Patent: August 31, 2021
    Assignee: SEIKO EPSON CORPORATION
    Inventor: Shinsuke Fujikawa
  • Publication number: 20210247643
    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: April 29, 2021
    Publication date: August 12, 2021
    Applicant: SEIKO EPSON CORPORATION
    Inventor: Shinsuke FUJIKAWA
  • Patent number: 11049464
    Abstract: 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: Grant
    Filed: November 18, 2019
    Date of Patent: June 29, 2021
    Assignee: SEIKO EPSON CORPORATION
    Inventor: Shinsuke Fujikawa
  • Patent number: 11022833
    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: May 22, 2019
    Date of Patent: June 1, 2021
    Assignee: SEIKO EPSON CORPORATION
    Inventor: Shinsuke Fujikawa
  • Patent number: 11011125
    Abstract: 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: Grant
    Filed: March 12, 2020
    Date of Patent: May 18, 2021
    Assignee: SEIKO EPSON CORPORATION
    Inventor: Shinsuke Fujikawa
  • Publication number: 20210142756
    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 operationa 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: Application
    Filed: November 10, 2020
    Publication date: May 13, 2021
    Applicant: SEIKO EPSON CORPORATION
    Inventor: Shinsuke FUJIKAWA
  • Publication number: 20210110747
    Abstract: An electro-optical device includes a first video line and a second video line adjacent to each other, a first high potential line electrically coupled to the first video line via a first diode, a first low potential line electrically coupled to the first video line via a second diode, a second high potential line electrically coupled to the second video line via a third diode, and a second low potential line electrically coupled to the second video line via a fourth diode. The first diode has an anode electrically coupled to the first video line, the second diode has a cathode electrically coupled to the first video line, the third diode has an anode electrically coupled to the second video line, and the fourth diode has a cathode electrically coupled to the second video line.
    Type: Application
    Filed: October 14, 2020
    Publication date: April 15, 2021
    Applicant: SEIKO EPSON CORPORATION
    Inventor: Shinsuke FUJIKAWA
  • Publication number: 20210103193
    Abstract: A first substrate of an electro-optical device includes a data line, a switching element of a demultiplexer, which is provided corresponding to the data line, and a selection signal supply wiring configured to supply a selection signal for selecting one data line, among a plurality of the data lines grouped into blocks, to the switching element. The first substrate also includes a resistance member for electrically connecting the selection signal supply wirings adjacent to each other. Thus, all of the selection signal supply wirings can be supplied with a selection signal for analysis, when a probe is brought into contact with an inspection terminal.
    Type: Application
    Filed: October 6, 2020
    Publication date: April 8, 2021
    Applicant: SEIKO EPSON CORPORATION
    Inventor: Shinsuke FUJIKAWA
  • Publication number: 20210103167
    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: Application
    Filed: September 30, 2020
    Publication date: April 8, 2021
    Applicant: SEIKO EPSON CORPORATION
    Inventor: Shinsuke FUJIKAWA
  • Publication number: 20210104186
    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: Application
    Filed: October 1, 2020
    Publication date: April 8, 2021
    Applicant: SEIKO EPSON CORPORATION
    Inventor: Shinsuke FUJIKAWA
  • Patent number: 10908442
    Abstract: In an electro-optical device, a flexible first wiring substrate and a flexible second wiring substrate, which are respectively coupled to a first terminal region and a second terminal region, extend while overlapping with each other, and a first mold material is provided between the first wiring substrate and the second wiring substrate. The second wiring substrate includes a base film having transmissivity, a wiring line provided at the base film, and a protective layer that covers the wiring line and is less transmissive than the base film. In the second wiring substrate, a light-transmission window in which the wiring line and the protective layer are not present in part is provided in a region thereof overlapping with the first mold material.
    Type: Grant
    Filed: July 16, 2020
    Date of Patent: February 2, 2021
    Assignee: SEIKO EPSON CORPORATION
    Inventor: Shinsuke Fujikawa
  • Publication number: 20210027681
    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: Application
    Filed: September 28, 2020
    Publication date: January 28, 2021
    Applicant: SEIKO EPSON CORPORATION
    Inventor: Shinsuke FUJIKAWA
  • Publication number: 20210026189
    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: Application
    Filed: July 22, 2020
    Publication date: January 28, 2021
    Applicant: SEIKO EPSON CORPORATION
    Inventor: Shinsuke FUJIKAWA