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:
Dec. 07, 2004
Filed:
Apr. 17, 2002
Daniel Gibilini, Saint Martin d'Uriage, FR;
Synelec Telecom Multimedia, Saint-Sernin-sur-Rance, FR;
Abstract
The invention concerns a rear projection screen, comprising a support ( ) with focusing elements such as microlenses ( ) or lenticular elements, a holographic diffuser, and an opaque layer ( ) with apertures ( ) for allowing through the light focused by the microlenses. The light projected from the rear of the screen is concentrated by the microlenses ( ) and passes through the opaque layer by the apertures ( ). The holographic diffuser controls the directivity of the light. The incident light on the screen is absorbed by the opaque layer, such that the layer provides good transmittivity, high contrast, and controlled directivity owing to the holographic diffuser. The invention also concerns a method for making such a rear projection screen whereby the apertures in the opaque layer are formed by irradiating said layer or a preparatory material through the microlenses.