35.1: 2.5‐in. AMOLED with Integrated 6‐Bit Gamma Compensated Digital Data Driver

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Abstract
6‐bit gamma compensated digital data driver using LTPS TFTs was integrated in AMOLED panel. We have applied conventional register ladder D/A converter circuits with 9 points reference voltage for each color. We have obtained both good gray scale and good white balance by optimizing the reference voltage. DC/DC converter and serial to parallel converter have also been integrated by TFT. The number of pixels is 768 × 228 dots. The width of the data driver designed by 2micron rule is only 2.6mm.

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