Invention Grant
- Patent Title: Thin film transistor circuit, light emitting display apparatus, and driving method thereof
- Patent Title (中): 薄膜晶体管电路,发光显示装置及其驱动方法
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Application No.: US12667827Application Date: 2008-07-29
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Publication No.: US08654114B2Publication Date: 2014-02-18
- Inventor: Hisae Shimizu , Katsumi Abe , Ryo Hayashi
- Applicant: Hisae Shimizu , Katsumi Abe , Ryo Hayashi
- Applicant Address: JP Tokyo
- Assignee: Canon Kabushiki Kaisha
- Current Assignee: Canon Kabushiki Kaisha
- Current Assignee Address: JP Tokyo
- Agency: Fitzpatrick, Cella, Harper & Scinto
- Priority: JP2007-209984 20070810
- International Application: PCT/JP2008/063932 WO 20080729
- International Announcement: WO2009/022563 WO 20090219
- Main IPC: G09G5/00
- IPC: G09G5/00

Abstract:
In order to suppress an influence of an electrical stress on a TFT characteristic in use of a TFT, a light emitting display apparatus according to the present invention comprises organic EL devices and driving circuits for driving the organic EL devices. The driving circuit includes plural pixels each having a thin film transistor of which a threshold voltage reversibly changes due to the electrical stress applied between a gate terminal and a source terminal, and a voltage applying unit which sets gate potential of the thin film transistor higher than source potential. The voltage applying unit applies the electrical stress between the gate terminal and the source terminal at a time when the thin film transistor is not driven, so as to drive the thin film transistor in a region that the threshold voltage is saturated to the electrical stress.
Public/Granted literature
- US20110001747A1 THIN FILM TRANSISTOR CIRCUIT, LIGHT EMITTING DISPLAY APPARATUS, AND DRIVING METHOD THEREOF Public/Granted day:2011-01-06
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