High-resolution FLC displays for handheld and projection use

Michael D. Wand; William N. Thurmes; Rohini T. Vohra; Kundalika M. More

doi:10.1117/12.311050

17 June 1998 High-resolution FLC displays for handheld and projection use

Michael D. Wand, William N. Thurmes, Rohini T. Vohra, Kundalika M. More

Proceedings Volume 3421, Display Technologies II; (1998) https://doi.org/10.1117/12.311050
Event: Asia Pacific Symposium on Optoelectronics '98, 1998, Taipei, Taiwan

Abstract

We describe hand-held magnified view and single panel color projection displays based on active matrix ferroelectric liquid crystal (FLC) technology. The FLC light-modulating layer is placed on top of a reflective CMOS backplane. This geometry effectively takes advantage of the fast switching speed and high resolution possible in a sub-micron thick layer of FLC and fine design rules available in standard CMOS fabs. The fast FLC switching speed allows both gray scale and color to be generated with time sequential addressing. Current FLC materials are well suited to operation with mainstream 5 volt CMOS processes and offer a clear path to compatibility with newer 3.3 and 2.5 V processes. These lower voltages result in lower power consumption and finer design rules allowing for higher density of on-chip electronics such as MPEG2. This option is difficult to achieve in higher voltage processes typical of nematic on VLSI devices. The reflective quarter wave plate design of the display affords a large angular acceptance resulting in flexibility of optical design as well as excellent contrast and throughput vs. viewing angle.

Citation Download Citation

Michael D. Wand, William N. Thurmes, Rohini T. Vohra, and Kundalika M. More "High-resolution FLC displays for handheld and projection use", Proc. SPIE 3421, Display Technologies II, (17 June 1998); https://doi.org/10.1117/12.311050

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