Holographic reflective color liquid crystal display device

Details Holographic reflective color liquid crystal display device Holographic reflective color liquid crystal display device

1996-05-01

1998-09-22

Sikes, William L.

Liquid crystal cells, elements and systems

Particular structure

Having significant detail of cell structure only

349117, 349179, 359 15, G02F 11335, G02F 113

Patent

active

058122290

ABSTRACT:
A liquid crystal display device (10) includes a front polarizer (12), a liquid crystal cell (14), a retardation film (16), a back polarizer (18), and a reflective holographic optical element (20). Diffuse ambient light illuminates the front polarizer (12), which polarizes the ambient light and transmits the polarized light to the liquid crystal cell (14). The liquid crystal cell (14) receives the polarized light and transmits polarized light derived from the incident polarized light to the retardation film (16). The retardation film (16) receives the polarized light and transmits polarized light, including light within a selected spectral band. The back polarizer (18) receives the polarized light from the retardation film (16) and selectively transmits polarized light derived from the incident polarized light. The reflective holographic optical element (20) receives polarized light from the back polarizer (18) and redirects the polarized light toward the back polarizer (18), wherein the light has an effective spectral band that includes light in the selected spectral band.

REFERENCES:
patent: 4973131 (1990-11-01), McDonald et al.
patent: 5011244 (1991-04-01), Smith et al.
patent: 5267060 (1993-11-01), Colton
patent: 5594560 (1997-01-01), Jelley et al.

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