Invention Grant
- Patent Title: Display device and method for driving same
- Patent Title (中): 显示装置及其驱动方法
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Application No.: US14404354Application Date: 2013-04-30
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Publication No.: US09335598B2Publication Date: 2016-05-10
- Inventor: Toshinori Sugihara , Noboru Noguchi
- Applicant: Sharp Kabushiki Kaisha
- Applicant Address: JP Osaka
- Assignee: SHARP KABUSHIKI KAISHA
- Current Assignee: SHARP KABUSHIKI KAISHA
- Current Assignee Address: JP Osaka
- Agency: Chen Yoshimura LLP
- Priority: JP2012-123294 20120530; JP2012-256087 20121122
- International Application: PCT/JP2013/062586 WO 20130430
- International Announcement: WO2013/179845 WO 20131205
- Main IPC: G09G3/32
- IPC: G09G3/32 ; G02F1/1362

Abstract:
In a pixel circuit, during a period during which an organic EL element is not emitting light, transistors are in an “on” state and the organic EL element (OLED) is reversed-biased by a low-level power-supply potential and a reverse-biasing power-supply potential. A reverse-direction voltage determined by a reverse-direction current that depends on the degree to which degradation of the organic EL element has progressed is thus written to a capacitor. A data voltage is then supplied to the capacitor via another capacitor, bringing the drive voltage of a transistor (T2) that controls the current that drives the organic EL element to Vsig+Voledr. This makes it possible to minimize decreases in the emission luminance of an electrooptical element such as an organic EL element due to degradation thereof over time.
Public/Granted literature
- US20150146129A1 DISPLAY DEVICE AND METHOD FOR DRIVING SAME Public/Granted day:2015-05-28
Information query
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