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OLED pixel circuit and light emitting display using the same
   
Document Number
US Patent 7557784
Issued Date
July 7, 2009
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Abstract
A pixel and a light emitting display including the pixel. The pixel includes first and second organic light emitting diodes (OLEDs), a driving circuit commonly connected to the plurality of OLEDs to drive the first and second OLEDs, a switching circuit connected between the first and second OLEDs and the driving circuit to sequentially control the driving of the first and second OLEDs using first and second emission control signals, and a reverse bias circuit for selectively applying a reverse bias voltage including at least one of the first and second emission control signals to the first and second OLEDs. Therefore, the reverse bias can be easily applied in the periods when the OLEDs do not emit light and thus can improve the characteristics of the OLEDs.
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Number of Claims:
24
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Published
July 7, 2009
Application Number
11/274,042
Filed
November 14, 2005
US Classification
345/82   345/205
Int'l Classification
G09G   3/32   (20060101)  
Examiner
Assistant Examiner
Attorney/Law Firm
Priority Data
Nov 22, 2004 [KR] 10-2004-0095983
USPTO Field of Search
345/82   345/205   345/206  
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