Optical: systems and elements – Holographic system or element – Using a hologram as an optical element
Patent
1995-01-06
1996-06-25
Gross, Anita Pellman
Optical: systems and elements
Holographic system or element
Using a hologram as an optical element
359 70, 362278, 362320, G02F 11335, F21V 1702
Patent
active
055305717
ABSTRACT:
A liquid crystal display device including a frame, a liquid crystal module and a back light module mounted within the frame, and a transparent backing covered on the frame over the back light module, the back light module consisting of a diffusion scroll, a reflecting scroll, and a photo conductive plate disposed between the diffusion scroll and the reflecting scroll, the diffusion scroll including a diffusion screen and a transparent screen connected in series, the reflecting scroll including an opaque reflecting screen and a transparent screen, the frame having rotary knobs turned to rotate the diffusion scroll and the reflecting scroll, permitting the diffusion screen and the opaque reflecting screen to be aligned with the liquid crystal module for image displays, or permitting the transparent screens to be aligned with the liquid crystal module for slide projections.
REFERENCES:
patent: 4616295 (1986-10-01), Jewell et al.
patent: 4909604 (1990-03-01), Kobayashi et al.
Gross Anita Pellman
Malinowski Walter J.
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