发明授权
US07212179B2 Light emitting display device, electronic equipment into which the same device is loaded, and drive method of the light emitting display device 有权
发光显示装置,装载有相同装置的电子装置以及发光显示装置的驱动方法

  • 专利标题: Light emitting display device, electronic equipment into which the same device is loaded, and drive method of the light emitting display device
  • 专利标题(中): 发光显示装置,装载有相同装置的电子装置以及发光显示装置的驱动方法
  • 申请号: US11208547
    申请日: 2005-08-23
  • 公开(公告)号: US07212179B2
    公开(公告)日: 2007-05-01
  • 发明人: Shuichi Seki
  • 申请人: Shuichi Seki
  • 申请人地址: JP Yamagata
  • 专利权人: Tohoku Pioneer Corporation
  • 当前专利权人: Tohoku Pioneer Corporation
  • 当前专利权人地址: JP Yamagata
  • 代理机构: Westerman, Hattori, Daniels & Adrian, LLP.
  • 优先权: JP2004-243131 20040824
  • 主分类号: C09G3/30
  • IPC分类号: C09G3/30 C09G3/10
Light emitting display device, electronic equipment into which the same device is loaded, and drive method of the light emitting display device
摘要:
A correction voltage retaining capacitor C2, a correction voltage write transistor Tr4, and a switching transistor Tr5 are added to a pixel structure of an SES drive method provided with an organic EL element E1 as a light emitting element, a light emission drive transistor Tr1, a data write transistor Tr2, and an erase transistor Tr3 which can erase electrical charges in a light emission maintaining capacitor C1. With the ON operation of the erase transistor Tr3, the correction voltage write transistor Tr4 is turned on, and the switching transistor Tr5 is turned off. In this state, the threshold voltage (Vth) of the light emission drive transistor Tr1 is written in the correction voltage retaining capacitor C2. When pixels are lit, by a gate-to-source voltage obtained by adding the threshold voltage written in the correction voltage retaining capacitor C2 to a data voltage written in the light emission maintaining capacitor C1, drain current of the light emission drive transistor Tr1 flows. Thus, among respective pixels, a lighting operation is performed in a state in which variations of light emission intensities caused by variations of threshold voltages of the light emission drive transistor Tr1 are restrained.
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