Wen-Yaw Chung, Yu-Chien Tseng, Yu-Wen Chen, Chih-Jen Yen
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The Column Driver Circuit Design for Passive Organic Electroluminescence Display
This article proposes a column driver circuit design for a passive organic electro-luminescent display (PMOELD). A new method for grayscale driving has been developed for providing better visual effect. Besides, a novel programmable current-mode data driver circuit with calibration techniques is used to overcome process and environmental variations, especially there is column current mismatch due to the different distance to a bias reference. The proposed circuit has been designed and verified by using VIS 0.35mum, 2P4M and 13.5V high voltage process. The brightness current has been emphasized to simulate the performance of the variations elimination between different column circuits. By using the Monte Carlo simulation, the result of the current variation in different column is under 2% when the standard deviation of threshold voltage is 0.18V
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