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:
May. 03, 2005
Filed:
Aug. 29, 2002
Bobby Dean Landreth, Ft. Lauderdale, FL (US);
Steven D. Pratt, Ft. Lauderdale, FL (US);
Robert W. Pennisi, Boca Raton, FL (US);
Ronald J. Kelley, Coral Springs, FL (US);
Sivakumar Muthuswamy, Plantation, FL (US);
David S. Fredley, Coral Springs, FL (US);
Bobby Dean Landreth, Ft. Lauderdale, FL (US);
Steven D. Pratt, Ft. Lauderdale, FL (US);
Robert W. Pennisi, Boca Raton, FL (US);
Ronald J. Kelley, Coral Springs, FL (US);
Sivakumar Muthuswamy, Plantation, FL (US);
David S. Fredley, Coral Springs, FL (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
Rewritable signs () that include bistable cholesteric liquid crystal layers () are provided. According to one embodiment a rewritable sign () is devoid of circuitry for establishing electric fields in localize regions for writing information to the rewritable sign (), and is consequently inexpensive. In the latter embodiment, a separate information writer () that includes an array of pixel electrodes () that is driven by an active matrix () is used to write information on the rewritable sign. According to another embodiment a rewritable sign () includes three cholesteric liquid layers () each of which reflects a different primary color. The three cholesteric liquid crystal layers () are interleaved with sets of conductive lines () that are used to apply signals to the cholesteric liquid crystal layers () for the purpose of writing information.