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:
Mar. 22, 2016
Filed:
Dec. 23, 2010
Peter Levermore, Lambertville, NJ (US);
Emory Krall, Philadelphia, PA (US);
Jeffrey Silvernail, Yardley, PA (US);
Kamala Rajan, Newtown, PA (US);
Julia J. Brown, Yardley, PA (US);
Peter Levermore, Lambertville, NJ (US);
Emory Krall, Philadelphia, PA (US);
Jeffrey Silvernail, Yardley, PA (US);
Kamala Rajan, Newtown, PA (US);
Julia J. Brown, Yardley, PA (US);
Universal Display Corporation, Ewing, NJ (US);
Abstract
Light extraction blocks, and OLED lighting panels using light extraction blocks, are described, in which the light extraction blocks include various curved shapes that provide improved light extraction properties compared to parallel emissive surface, and a thinner form factor and better light extraction than a hemisphere. Lighting systems described herein may include a light source with an OLED panel. A light extraction block with a three-dimensional light emitting surface may be optically coupled to the light source. The three-dimensional light emitting surface of the block may includes a substantially curved surface, with further characteristics related to the curvature of the surface at given points. A first radius of curvature corresponding to a maximum principal curvature kat a point p on the substantially curved surface may be greater than a maximum height of the light extraction block. A maximum height of the light extraction block may be less than 50% of a maximum width of the light extraction block. Surfaces with cross sections made up of line segments and inflection points may also be fit to approximated curves for calculating the radius of curvature.