Single display assembly having selective reflectors to view indi

Details Single display assembly having selective reflectors to view indi Single display assembly having selective reflectors to view indi

1999-09-10

2000-10-17

Dowling, William

Optics: image projectors

Polarizer or interference filter

349 61, 349 62, 353122, 359 15, G03B 2128, G02F 11335

Patent

active

06132048&

ABSTRACT:
A single display assembly (10) has an electronically controllable display (11) with a plurality of display elements (12) and sandwiched by two support plates (13,14), two polarizers (15,16) and two selective reflectors, namely a first selective reflector (17) and a second selective reflector (18). Support plates (13,14) and polarizers (15,16) are transparent media to permit passage of light. Selective reflectors (17,18) are holographic reflectors that are each pre-recorded with characteristics that includes a range (19 or 20) of predetermined incident angles relative to inward facing horizontal surfaces (24,25) and an angular transparency range (not shown) for passage of light. Assembly (10) has two opposite sides (21,22) to view indicia provided by display elements (12). Indicia can be selectively viewed from either of sides (21 or 22) without interference from external background of a remaining one of sides (21 or 22).

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patent: 6044196 (2000-03-01), Winston et al.

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