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. 12, 2019
Filed:
Apr. 18, 2018
Schott Ag, Mainz, DE;
Bernd Wölfing, Mainz, DE;
Thomas Reichert, Wackernheim, DE;
Andreas Dietrich, Guldental, DE;
Andreas Schneider, Neu-Bamberg, DE;
Björn Bleisinger, Riesweiler, DE;
Marc Timon Sprzagala, Mainz, DE;
Martin Cramer, Wiesbaden, DE;
Oliver Keiper, Hünstetten, DE;
Sandra Mattheis, Eltville, DE;
SCHOTT AG, Mainz, DE;
Abstract
A light source is provided that includes at least two semiconductor light-emitting elements that emit light of different color, a light guide, an electronic control unit, and a light sensor. The light emitted by the elements is injected, at least partially, into the light guide and exits laterally from the light guide. The brightness of the elements can be adjusted by the electronic control unit. The light sensor is arranged to receive the light injected by the elements and laterally exiting from the light guide. The electronic control unit accumulates sensor signals from the light sensor over an integration time interval and compares the accumulated signals with a target value or range to determine a difference, changes a brightness of the elements in response to the difference, and changes the integration time interval in response to the difference or to a change in the target value.