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Proceedings Paper

High-resolution FLC microdisplay
Author(s): Osamu Akimoto; Shunichi Hashimoto
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Paper Abstract

A 0.9' high resolution reflective microdisplay using ferroelectric liquid crystal on Si backplane has been developed. This device has 2.3 million pixels (UXGA/HDTV) with 16:10 aspect ratio. The highest resolution of 10 micrometers pixel pitch with 86% fill factor was achieved by the newly- designed pixel driver circuit. This circuit consisted of 5 transistors and 3 capacitors fabricated with only NMOS using conventional 0.35 micrometers CMOS process and the architecture with two memories per each pixel realized to write the next data into the pixel memory while the image was displayed. This enabled all the pixel data to be rewritten simultaneously with high refresh rate of 6.5 kHz, giving higher efficiency of light utilization than conventional scanning technique which rewrite the data at a line. The high refresh rate made color break-up invisible even in moving picture. In this system a new modulation technique using LED light source to generate grayscale was devised. The combined technique of pulse width modulation and light source modulation gave full color image using sequential color with high grayscale. This microdisplay is promising for projection displays and virtual image displays.

Paper Details

Date Published: 25 April 2000
PDF: 7 pages
Proc. SPIE 3954, Projection Displays 2000: Sixth in a Series, (25 April 2000); doi: 10.1117/12.383374
Show Author Affiliations
Osamu Akimoto, Sony Corp. (Japan)
Shunichi Hashimoto, Sony Corp. (Japan)

Published in SPIE Proceedings Vol. 3954:
Projection Displays 2000: Sixth in a Series
Ming Hsien Wu, Editor(s)

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