Design of A 1?× 1?, 512×512 poly‐Si TFT‐LCD with integrated 8‐bit parallel‐serial digital data drivers

Abstract A 1"×1”26,512×512 poly‐Si TFT‐LCD with a new integrated 8‐bit parallel‐serial digital data driver was proposed and designed. For high resolution, the proposed parallel‐serial digital driver used serial video data rather than parallel ones. Thus, digital circuits for driving one column line could be integrated within very small width. The parallel‐serial digital data driver comprised of shift registers, latches, and serial digital‐to‐analog converters (DAC's). We designed a 1"×1”, 512×512 poly‐Si TFT‐LCD with integrated 8‐bit parallel‐serial digital data drivers by a circuit simulator which has physical‐based analytical model of poly‐Si TFT's. The fabricated shift register well operated at 2 MHz and VDD=10V and the fabricated poly‐Si TFT serial DAC's, which converts serial digital data to an analog signal, could convert one bit within 2.8 μs. The driver circuits for one data line occupied 8100 × 50 μm2 with 4 μm design rule.