Novel driving scheme for FLCD

Jiin-chuan Wu; Chi-Chang Wang

doi:10.1117/12.235360

11 March 1996 Novel driving scheme for FLCD

Jiin-chuan Wu, Chi-Chang Wang

Proceedings Volume 2651, Liquid Crystal Materials, Devices, and Applications IV; (1996) https://doi.org/10.1117/12.235360
Event: Electronic Imaging: Science and Technology, 1996, San Jose, CA, United States

Abstract

A frame change data driving scheme (FCDDS) for ferroelectric LCD(FLCD) of matrix- addressing is developed which uses only positive voltages for the row and column waveforms to achieve bipolar driving waveforms on the FLCD pixels. Thus the required supply voltage for the driver chips is half that of the conventional driving scheme. Each scan line is addressed in only twice the switching time (tau) (minimum response time of FLC) so that this scheme is suitable for high duty ratio panels. In order to meet this bistable electro-optic effect of FLCD and zero net dc voltage across each pixel of the liquid crystal, turning on and turning off pixels are done at different time slots and frame slots. This driving scheme can be easily implemented using commercially available STN LCD drivers plus a small external circuit or by making an ASIC which is a slight modification of the STN driver. Both methods are discussed.

Citation Download Citation

Jiin-chuan Wu and Chi-Chang Wang "Novel driving scheme for FLCD", Proc. SPIE 2651, Liquid Crystal Materials, Devices, and Applications IV, (11 March 1996); https://doi.org/10.1117/12.235360

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