The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 28, 2000
Filed:
Jun. 05, 1995
James Lynn Davis, Parkland, FL (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
An optical waveguide (5) for use in the in the visible range, the infrared range or the ultraviolet range. The waveguide has two cholesteric liquid crystal polymer layers (10) positioned parallel to each other, forming a gap between them. When electrically modulated to an `on` state, one or more of the cholesteric liquid crystal polymer layers become optically reflective, so that the waveguide becomes internally reflective, allowing a light beam (15) to be transmitted along the waveguide. The liquid crystal polymer is optically non-reflective when electrically modulated to an `off` state. The cholesteric liquid crystal polymer layers are each disposed on a substrate (30) having an electrically conductive layer (35) disposed between the substrate and the cholesteric liquid crystal polymer. A modulating means impresses an electrical signal upon the cholesteric liquid crystal polymer layers to convert them from the optically reflective state to the optically non-reflective state.