Cheol-min Kim

21.4: Development of SLS-Based System on Glass Display

2-inch qVGA (240×320) TFT-LCD with integrated 6-bit source driver is reported. TS-SLS (Two-Shot Sequential Lateral Solidification) technique has been employed to improve the TFT characteristics. Thanks to the superb characteristics of the TS-SLS TFTs, 1:6 de-multiplexing driving scheme has been successfully implemented in the source driver, which resulted very compact circuit area and the highest resolution (200ppi) SOG (System on Glass) display ever reported.

P‐24: Design of Low‐Cost 2.2‐inch qVGA LTPS TFT‐LCD Panel

In this paper, 2.2-inch qVGA LTPS(Low Temperature Poly-Si) TFT-LCD panel driven by external output buffers is proposed to reduce the display system cost. The LTPS panel with external output buffers improves the yield because only the digital functions are integrated on the LTPS panel. This also achieves a small number of interconnection lines between external IC and the LTPS panel. Finally, display system cost can be reduced by lowering the cost of flexible PCBs(Printed Circuit Boards). Moreover, the proposed panel adopts 1:6 de-multiplexing scheme for decreasing the height of the source driver circuitries. Compared with the conventional structure of 1:3 de-multiplexing scheme, the height of the source driver area is reduced as much as 40%.