I-Hsiu Lo, Hui-Wen Cheng, Yiming Li, Po-Jui Lin, Cheng-Han Shen
National Chiao Tung University
In this work, we design and optimize an amorphous silicon gate (ASG) driver circuit for GOP (gate-on-panel) application in medium size LCD. The circuit is composed of sixteen TFTs and one capacitor with distinct pre-charge nodes and dual low voltage levels. The design of distinct pre-charge nodes is conducive to the decrease of the charge time, and the dual low voltage level will stabilize the output waveform in off-duty periods. Biology-inspired global optimization technique is thus advanced to optimize circuit parameter for further improvement of dynamic characteristics. The optimization not only considers common terms but the pre-charge node voltage, which may cause severe influence to output stability when the temperature becomes higher. The results of our design and optimization indicate the circuit performance is achieved which is apparently better than the original design, where the associated sensitivity analysis is examined to verify the variation of optimized circuits. The design is useful for manufacturing.