Liquid crystal cells – elements and systems – Particular structure – Having significant detail of cell structure only
Patent
1996-03-28
1998-04-28
Sikes, William L.
Liquid crystal cells, elements and systems
Particular structure
Having significant detail of cell structure only
349177, 359 15, G02F 11335, G02F 113
Patent
active
057452032
ABSTRACT:
A liquid crystal display device (10) for forming a display includes a liquid crystal panel (12), a switchable holographic optical element (14), and a reflective holographic optical element (16). Ambient light illuminates a front polarizer (18), which polarizes the ambient light and transmits the polarized light to the liquid crystal cell (20). The liquid crystal cell (20) receives the polarized light and transmits polarized light derived from the incident polarized light to a back polarizer (22). The back polarizer (22) polarizes the light and transmits the light to the switchable holographic optical element (14). While in a first mode, the switchable holographic optical element (14) redirects the light back toward the liquid crystal panel (12) within a first viewing cone (34) to form the display. In a second mode, the switchable holographic optical element (14) is transparent and transmits the light to the reflective holographic optical element (16). The reflective holographic optical element (16) redirects the light back toward the liquid crystal panel (12) in a second viewing cone (36) to form the display. The second viewing cone (36) is preferably narrower than the first viewing cone (34), which increases the intensity of the light within the second viewing cone (36).
REFERENCES:
patent: 4984872 (1991-01-01), Vick
patent: 5011244 (1991-04-01), Smith et al.
patent: 5198912 (1993-03-01), Ingwall et al.
patent: 5499118 (1996-03-01), Wreede et al.
patent: 5548427 (1996-08-01), May
patent: 5663816 (1997-09-01), Chen et al.
SID 93 Digest, "Holographic Diffusers for LCD Backlights and Projection Screens," J. M. Tedesco et al. (1993).
Hay et al., "Characterization of Polaroid's DMP-128 Holographic Recording Photopolymer", SPIE, vol. 883, (1988), pp. 102-105.
Ingwall et al., "Computer and Optically Generated Holographic Optics," SPIE, vol. 1555, (1991), pp. 279-290.
Ingwall et al., "The Mechanism of Hologram Formation in DMP-128 Photopolymer," SPIE, vol. 883, (1988), pp. 102-105.
Ingwall et al., "Hologram Recording With a New Polaroid Photopolymer System," SPIE, vol. 523, (1985), pp. 306-312.
Chen Alan G.
Jelley Kevin W.
Johnson Mark J.
Valliath George T.
Fekete Douglas D.
MacIntyre John B.
Motorola Inc.
Ngo Julie
Sikes William L.
LandOfFree
Liquid crystal display device including multiple ambient light i does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Liquid crystal display device including multiple ambient light i, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Liquid crystal display device including multiple ambient light i will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1537728