H - Electricity – 01 – L
Patent
H - Electricity
01
L
375/37, 345/8
H01L 33/00 (2006.01) G02F 1/1335 (2006.01) G09F 19/12 (2006.01)
Patent
CA 1268271
Electro-optic Animated Displays and Indicator by David Makow Abstract In this invention, animation effects have been obtained in a device containing a light source illuminating a linear polariser producing plane polarised light which is rotated in an electro- optical cell/cells such as a Liquid Crystal or PLZT cell. The angle of the plane is changed at the required speed by a voltage applied to the electrodes of the cell; this voltage being generated in an electronic circuit or obtained from the output of a transducer or manually. The rotated plane polarised light is shining through a stationary set of at least two linear polarisers oriented at different angles and then through a screen containing the art work. The emerging lighted image is perceived by the viewer as a change or as an animated movement of the art work. Colour effects can also be obtained when a chromatic polariser or a chromatic retardation plate is used. In the prior art, the change of the angle of the plane polarised light was achieved by mounting the linear polariser on a mechanically rotated wheel. The introduction of electro-optical voltage controlled cells has many advantaged such as speed of response, illumination of moving parts, feasibility of new effects, and flexibility of design. The applications of this invention are in advertising and exhibition displays, animated signage, animated printed material, instrument readout indicators and monitors, works of art, and in the field of toys and games.
551216
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