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:
Feb. 26, 2013
Filed:
Mar. 31, 2008
Maarten Marinus Johannes Wilhelmus Van Herpen, Eindhoven, NL;
Alexander Henricus Waltherus Van Eeuwijk, Eindhoven, NL;
Eduard Matheus Johannes Niessen, Eindhoven, NL;
Maarten Marinus Johannes Wilhelmus Van Herpen, Eindhoven, NL;
Alexander Henricus Waltherus Van Eeuwijk, Eindhoven, NL;
Eduard Matheus Johannes Niessen, Eindhoven, NL;
Koninklijke Philips Electronics N.V., Eindhoven, NL;
Abstract
A light output device comprises a first and a second substrate arrangement (), the first substrate arrangement () comprising a light output surface of the device. An electrode arrangement () is sandwiched between the substrate arrangements and at least one light source () is connected to the electrode arrangement. The first substrate () arrangement comprises a light diffuser for changing the level of uniformity of the light output from the light source and the second substrate () arrangement comprises a light scattering or reflecting layer. This arrangement uses a scattering substrate arrangement for the substrate from which illumination is provided. In order to enhance the level of uniformity, the opposite substrate arrangement is also either scattering or reflecting.