Liquid crystal cells – elements and systems – Particular structure – Lens or prism separate from projection system
Patent
1998-03-17
2000-12-26
Sikes, William L.
Liquid crystal cells, elements and systems
Particular structure
Lens or prism separate from projection system
349113, 348337, 353 81, 359129, 359836, G02F 11335, H04N 907, G03B 21228, H04J 1402, G02B 504
Patent
active
061667870
ABSTRACT:
The display device includes an optical cell having a cell front with at least one cell region being capable of an optically transmissive mode and an optically nontransmissive mode with reference to the cell front. The optical cell contains an optically active material responsive to an applied electrical field such that optical properties of the material are controllably changeable. A reflector may be optically coupled to the cell. A prismatic film including a prismatic surface is optically coupled to the optical cell. The prismatic surface preferably comprises a series of prisms. The prisms have first faces and second faces intersecting the first faces. The first faces are oriented to refract light obliquely intercepting the first faces and the second faces are oriented to minimize refractive, reflective, and optical interactions of the light with the second faces. The prismatic film, the cell, and the reflector optically cooperate such that light entering a display at an incident angle is emitted from the display at an exiting angle distinct from the incident angle for viewing of the display.
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Akins Robert Benjamin
Jelley Kevin William
Valliath George Thomas
Chowdhury Tarifur R.
Fekete Douglas D.
Motorola Inc.
Sikes William L.
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