Gray-scale and contrast compensator for LCDs using obliquely oriented anisotropic network

Donald B. Taber; Leonard G. Hale; Bruce K. Winker; William J. Gunning III; Mark C. Skarohlid; James D. Sampica; Tom A. Seder

doi:10.1117/12.321770

14 September 1998 Gray-scale and contrast compensator for LCDs using obliquely oriented anisotropic network

Donald B. Taber, Leonard G. Hale, Bruce K. Winker, William J. Gunning III, Mark C. Skarohlid, James D. Sampica, Tom A. Seder

Author Affiliations +

Proceedings Volume 3363, Cockpit Displays V: Displays for Defense Applications; (1998) https://doi.org/10.1117/12.321770
Event: Aerospace/Defense Sensing and Controls, 1998, Orlando, FL, United States

Abstract

Birefringent optical compensators containing layers with substantially inclined optic axes can improve not only the contrast but also the gray scale and chromatic stability of 90 degrees twisted nematic LCDs over a large field of view. We present the detailed architecture of such a compensator. It consists of multiple birefringent layers, including one with an in-plane optic axis, one with its optic axis normal to the plane, and two with optic axes inclined at about 40 degrees from the plane. The in-plane and inclined layers are fabricated by photopolymerization of oriented liquid crystal monomers to form anisotropic networks. The precise thicknesses and azimuthal orientations of the various layers are determined by computer optimization. Laboratory measurements of compensated display units show good contrast, gray level, and chromatic stability over a large field of view. The performance is suitable for demanding avionics applications. These compensators are currently being fabricated at the Rockwell Science Center.

Citation Download Citation

Donald B. Taber, Leonard G. Hale, Bruce K. Winker, William J. Gunning III, Mark C. Skarohlid, James D. Sampica, and Tom A. Seder "Gray-scale and contrast compensator for LCDs using obliquely oriented anisotropic network", Proc. SPIE 3363, Cockpit Displays V: Displays for Defense Applications, (14 September 1998); https://doi.org/10.1117/12.321770

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