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:
Aug. 21, 1990
Filed:
Jul. 11, 1989
Elliot A Rudell, Rancho Palos Verdes, CA (US);
Roger J Gardner, Rancho Palos Verdes, CA (US);
Other;
Abstract
There is disclosed an edge-lit multiple image display device. The device utilizes a plurality of internal-reflecting-light sheets which are provided in a stacked array. Images are formed on the surfaces of the sheets with a coating of a material that changes the density on the internally reflecting surface of its respective sheet. A light source is provided to illuminate the edges of the stacked array of sheets, with a light shield that can be moved to selectively direct the light to one edge at a time of the edges of the sheets in the stack. As the light shield is moved to selectively and alternatingly illuminate the edges of selected sheets in the stacked array, the images displayed on each of the edge-lit plates becomes illuminated, appearing and then disappearing as the light source is applied and then removed from the edge of its respective plate. This can be used to provide an animated display.