Patents by Inventor Yoshifumi Tsunekawa

Yoshifumi Tsunekawa 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).

  • Patent number: 7268843
    Abstract: There is provided an electro-optical device including, above a substrate, data lines extending in a first direction, scanning lines extending in a second direction and intersecting the data lines, pixel electrodes and thin film transistors disposed so as to correspond to intersection regions of the data lines and the scanning lines; and storage capacitors electrically connected to the thin film transistors and the pixel electrodes, the thin film transistors including semiconductor layers having channel regions which extend in a longitudinal direction and channel adjacent regions which extend further from the channel regions in the longitudinal direction, and the scanning lines including light-shielding parts disposed at sides of the channel regions.
    Type: Grant
    Filed: October 28, 2003
    Date of Patent: September 11, 2007
    Assignee: Seiko Epson Corporation
    Inventors: Hidenori Kawata, Yoshifumi Tsunekawa, Tomohiko Hayashi
  • Patent number: 7253795
    Abstract: An electro-optical device includes: data lines extending in a first direction above a substrate; scanning lines extending in a second direction and intersecting the data lines; pixel electrodes and thin-film transistors arrayed so as to correspond to intersection regions of the data lines and the scanning lines; capacitors formed at a layer higher than the semiconductor layer of the thin-film transistors and at a layer lower than the pixel electrodes, and electrically connected to pixel potential; and upper light shielding film positioned between the data lines and the pixel electrodes; the upper light shielding film defining at least the corners of pixel opening regions; and the scanning lines, the data lines, and the capacitors, being formed in the light shielded region.
    Type: Grant
    Filed: October 22, 2003
    Date of Patent: August 7, 2007
    Assignee: Seiko Epson Corporation
    Inventors: Yoshifumi Tsunekawa, Hisaki Kurashina, Yuichi Shimizu
  • Patent number: 7161193
    Abstract: There is provided an electro-optical device including, above a substrate, data lines extending in a first direction, scanning lines extending in a second direction and intersecting the data lines, pixel electrodes and thin film transistors disposed so as to correspond to intersection regions of the data lines and the scanning lines; and storage capacitors electrically connected to the thin film transistors and the pixel electrodes, the thin film transistors including semiconductor layers having channel regions which extend in a longitudinal direction and channel adjacent regions which extend further from the channel regions in the longitudinal direction, and the scanning lines including light-shielding parts disposed at sides of the channel regions.
    Type: Grant
    Filed: April 27, 2005
    Date of Patent: January 9, 2007
    Assignee: Seiko Epson Corporation
    Inventors: Hidenori Kawata, Yoshifumi Tsunekawa, Tomohiko Hayashi
  • Publication number: 20050199889
    Abstract: There is provided an electro-optical device including, above a substrate, data lines extending in a first direction, scanning lines extending in a second direction and intersecting the data lines, pixel electrodes and thin film transistors disposed so as to correspond to intersection regions of the data lines and the scanning lines; and storage capacitors electrically connected to the thin film transistors and the pixel electrodes, the thin film transistors including semiconductor layers having channel regions which extend in a longitudinal direction and channel adjacent regions which extend further from the channel regions in the longitudinal direction, and the scanning lines including light-shielding parts disposed at sides of the channel regions.
    Type: Application
    Filed: April 27, 2005
    Publication date: September 15, 2005
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Hidenori Kawata, Yoshifumi Tsunekawa, Tomohiko Hayashi
  • Patent number: 6835955
    Abstract: An electro-optical device includes, above a substrate, data lines extending in a first direction, scanning lines which extend in a second direction and which cross the data lines, pixel electrodes and thin film transistors disposed so as to correspond to regions in which the data lines and the scanning lines cross, storage capacitors electrically connected to the thin film transistors and the pixel electrodes, and a shield layer disposed between the data lines and the pixel electrodes. An upper electrode and a lower electrode between which a dielectric film forming each storage capacitor is supported including a first portion laminated along a plane parallel with one surface of the substrate and a second portion laminated along a plane orthogonal to the surface of the substrate, the sectional shape of the capacitor including a projecting shape.
    Type: Grant
    Filed: October 30, 2003
    Date of Patent: December 28, 2004
    Assignee: Seiko Epson Corporation
    Inventors: Takunori Iki, Yoshifumi Tsunekawa, Tomohiko Hayashi
  • Publication number: 20040145541
    Abstract: An electro-optical device includes, above a substrate, data lines extending in a first direction, scanning lines which extend in a second direction and which cross the data lines, pixel electrodes and thin film transistors disposed so as to correspond to regions in which the data lines and the scanning lines cross, storage capacitors electrically connected to the thin film transistors and the pixel electrodes, and a shield layer disposed between the data lines and the pixel electrodes. An upper electrode and a lower electrode between which a dielectric film forming each storage capacitor is supported including a first portion laminated along a plane parallel with one surface of the substrate and a second portion laminated along a plane orthogonal to the surface of the substrate, the sectional shape of the capacitor including a projecting shape.
    Type: Application
    Filed: October 30, 2003
    Publication date: July 29, 2004
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Takunori Iki, Yoshifumi Tsunekawa, Tomohiko Hayashi
  • Publication number: 20040141130
    Abstract: There is provided an electro-optical device including, above a substrate, data lines extending in a first direction, scanning lines extending in a second direction and intersecting the data lines, pixel electrodes and thin film transistors disposed so as to correspond to intersection regions of the data lines and the scanning lines; and storage capacitors electrically connected to the thin film transistors and the pixel electrodes, the thin film transistors including semiconductor layers having channel regions which extend in a longitudinal direction and channel adjacent regions which extend further from the channel regions in the longitudinal direction, and the scanning lines including light-shielding parts disposed at sides of the channel regions.
    Type: Application
    Filed: October 28, 2003
    Publication date: July 22, 2004
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Hidenori Kawata, Yoshifumi Tsunekawa, Tomohiko Hayashi
  • Publication number: 20040135940
    Abstract: An electro-optical device includes: data lines extending in a first direction above a substrate; scanning lines extending in a second direction and intersecting the data lines; pixel electrodes and thin-film transistors arrayed so as to correspond to intersection regions of the data lines and the scanning lines; capacitors formed at a layer higher than the semiconductor layer of the thin-film transistors and at a layer lower than the pixel electrodes, and electrically connected to pixel potential; and upper light shielding film positioned between the data lines and the pixel electrodes; the upper light shielding film defining at least the corners of pixel opening regions; and the scanning lines, the data lines, and the capacitors, being formed in the light shielded region.
    Type: Application
    Filed: October 22, 2003
    Publication date: July 15, 2004
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Yoshifumi Tsunekawa, Hisaki Kurashina, Yuichi Shimizu
  • Patent number: 4856013
    Abstract: A laser has an active layer formed on a prepared substrate, a cladding layer on the active layer and a contact layer on the cladding layer. The active layer and contact layer are formed of a semiconductor material of elements from Groups III-V. The contact layer and cladding layer are formed into an elongated projecting rib wherein the cladding layer has a remaining planar portion disposed across the active layer. An insulating layer of semiconductor of elements from Group II-VI is formed on each side of the rib supported on the remaining cladding layer.
    Type: Grant
    Filed: October 28, 1987
    Date of Patent: August 8, 1989
    Assignee: Seiko Epson Corporation
    Inventors: Hideaki Iwano, Yoshifumi Tsunekawa