Holographic light-control film for liquid crystal displays

Tsuyoshi Hotta; Nobuhiko Ichikawa; Hideaki Morita; Yoichi Mori; Bryce Bates; Daijiro Kodama

doi:10.1117/12.303655

18 March 1998 Holographic light-control film for liquid crystal displays

Tsuyoshi Hotta, Nobuhiko Ichikawa, Hideaki Morita, Yoichi Mori, Bryce Bates, Daijiro Kodama

Proceedings Volume 3293, Practical Holography XII; (1998) https://doi.org/10.1117/12.303655
Event: Photonics West '98 Electronic Imaging, 1998, San Jose, CA, United States

Abstract

We have been developing various holographic optical elements (HOEs) and holograms. In this paper holographic light control films (HLCF's) for use with reflective monochromatic type liquid crystal displays (LCDs) are discussed. The HLCFs are volume type holograms which diffract selected wavelengths of the ambient light to specific angles. Using HLCF's as reflectors in conjunction with LCDs allows the concentration of reflected light to specific viewing areas. Three beneficial characteristics of HLCFs, weak dependence upon incident light angles, good control of diffracted color and excellent environmental stability are described. (1) Weak dependency on incident light angles: Specially designing master holograms and replication conditions allows the production of HLCF's only depend weakly on the angle of the incident light. (2) Control of diffracted color: Varying process conditions allows the creation of HLCF's which diffract specific colors. (3) Stability during and after environmental tests: Using DuPont photopolymers resulted in good stability for both low and high temperatures and high humidity test conditions. In addition, the TEM pictures of the cross sections were shown.

Citation Download Citation

Tsuyoshi Hotta, Nobuhiko Ichikawa, Hideaki Morita, Yoichi Mori, Bryce Bates, and Daijiro Kodama "Holographic light-control film for liquid crystal displays", Proc. SPIE 3293, Practical Holography XII, (18 March 1998); https://doi.org/10.1117/12.303655

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