Transmissive liquid crystal cell with trench capacitor

Details Transmissive liquid crystal cell with trench capacitor Transmissive liquid crystal cell with trench capacitor

1996-11-15

2000-01-11

Dudek, James A

Liquid crystal cells, elements and systems

Particular excitation of liquid crystal

Electrical excitation of liquid crystal

257 59, G02F 11343

Patent

active

060141891

ABSTRACT:
An apparatus and method for providing a display cell structure based on the transmissive liquid crystal technology with a useful aperture ratio even as the cell size shrinks to less than 20 microns. The invention overcomes a problem of the prior art wherein the fractional area transmitting the light of the conventional designs becomes unacceptably low due to the aperture reducing opaque storage capacitor. This reduction in aperture ratio is removed in this invention by hiding the trench capacitor below the row and column x,y lines. The cell storage capacitor is formed using a vertical trench capacitor in SOI. Although useful even in standard display sizes and configurations, the invention is particularly useful for head-mounted displays and/or optical projection displays at the UXGA form factor for both monochromatic and color displays. Alternate capacitor configurations are described.

REFERENCES:
patent: 5835168 (1998-11-01), Takeda et al.
J.P. Salerno et al., "Single Crystal Silicon Transmissive AMLCD", SID Digest, Paper 5.7, pp. 63-66, 1992.

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