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This paper presents a novel driving scheme for AMOLED displays using a current mirror structure. For future low cost displays, the results are based on soluble-processed OTFTs. Since the characteristics of soluble-processed OTFTs are poor compared to pentacene-based OTFTs, the output current levels are controlled by adjusting the ratio of device dimensions. The simulation results show reliable uniformity between input data and OLED current. Also, successful compensation of OLED current due to threshold voltage variation is also shown.
Date of Conference: 12-14 Dec. 2007