Kook-Chul Moon

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.

35.2: Development of 3″ VGA LCD for DSC Application

3″ video graphic array (VGA) liquid crystal display (LCD) for digital still camera (DSC) has been developed using new driving method and fine process. This VGA panel can be driven by conventional standard interface which is widely used for 230K dots LCD. The fine process enabled us to design patterned vertical alignment (PVA) pixels with 50 % aperture ratio. It is expected that the high quality display can be realized by the technologies developed for the VGA DSC panel.

Novel mobile TFT-LCDs based on SLS technology

— Single-crystal-like silicon (SLS) technology is the most cost-effective laser-crystallization process ever invented. The throughput of the SLS process is about two times higher than that of the conventional excimer-laser annealing (ELA) method. In addition, the performance of the TFTs fabricated by the SLS process is among the best utilized in mass production. Various TFT-LCDs employing SLS technology, which included a 1.02-in. full SOG LCD using an icon display for the sub-display of cellular phones, a 1.9-in. qVGA TFT-LCD with a low-power analog interface employing a low-voltage driving scheme, and a 3.0-in. VGA TFT-LCD compatible with the 480i data format without additional signal processing were developed. Because the SLS process enables us to achieve highly uniform and reliable transistors, it can be effectively utilized in the mass production of mobile TFT-LCDs with low power consumption and enhanced image quality.