Invention Grant
US08648776B2 Display device, pixel circuit, and method for driving same 有权
显示装置,像素电路及其驱动方法

  • Patent Title: Display device, pixel circuit, and method for driving same
  • Patent Title (中): 显示装置,像素电路及其驱动方法
  • Application No.: US12937890
    Application Date: 2009-02-16
  • Publication No.: US08648776B2
    Publication Date: 2014-02-11
  • Inventor: Seiji Ohhashi
  • Applicant: Seiji Ohhashi
  • Applicant Address: JP Osaka
  • Assignee: Sharp Kabushiki Kaisha
  • Current Assignee: Sharp Kabushiki Kaisha
  • Current Assignee Address: JP Osaka
  • Agency: Nixon & Vanderhye P.C.
  • Priority: JP2008-131568 20080520
  • International Application: PCT/JP2009/052477 WO 20090216
  • International Announcement: WO2009/142033 WO 20091126
  • Main IPC: G09G3/30
  • IPC: G09G3/30
Display device, pixel circuit, and method for driving same
Abstract:
A display device has a pixel circuit (100) including: a drive element (110) provided on a path connecting a first wiring line (Vp) to a second wiring line (Vcom), having a control terminal, a first terminal, and a second terminal, and controlling a current flowing through the path; an electro-optic element (130) provided in series with the drive element (110) on the path, being connected to the first terminal of the drive element (110), and emitting light at a luminance according to the current flowing through the path; a first switching element (111) provided between the first terminal of the drive element (110) and a data line (Sj); a second switching element (112) provided between the control terminal and the second terminal of the drive element (110); a third switching element (113) provided between the second terminal of the drive element (110) and the first wiring line (Vp); and a capacitor (121) provided between the control terminal of the drive element (110) and a third wiring line (Ui). In the display device, a potential at which a voltage applied to the electro-optic element (130) is a light-emission threshold voltage or less is provided to the data line (Sj), and a potential of the third wiring line (Ui) changes in two levels.
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