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:
Jul. 20, 1999
Filed:
Sep. 11, 1997
Philip J Ralli, Medford, MA (US);
Polaroid Corporation, Cambridge, MA (US);
Abstract
A light-diffusing holographic transflector comprising a holographic layer and a transflective layer is disclosed. The transflector is capable under good ambient lighting conditions of illuminating an LCD display element by holographic reflection, and under poor ambient lighting conditions, by the transmission therethrough of internal edge- or back-lighting. The transmission of light is accomplished to form a predetermined visually-perceptible image (e.g., graphics, designs, and logos) by the provision in said transflector of a corresponding pattern of light-transmitting microholes. The light-transmitting microholes are formed preferably by laser ablation or etching.