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:
Oct. 08, 2019
Filed:
May. 16, 2018
Infineon Technologies Ag, Neubiberg, DE;
Infineon Technologies AG, Neubiberg, DE;
Abstract
Devices and techniques for individual control of multiple light emitting diodes (LEDs) in a LED array. A LED array may include multiple strands of LEDs with each strand including a single LED or multiple LEDs. The techniques of this disclosure include a parallel approach to controlling a LED array with a current measurement circuit in each LED strand. The current measurement circuits may be selectable by a controller via a multiplexer (MUX). The arrangement of circuit elements provides for an improved initialization phase and operating phase and may achieve an accurate and substantially equal current at all LEDs. The current control may ensure a homogenous light output that accounts for process and production variability, as well as changes in operating conditions. A LED control circuit of this disclosure may also include system safety features including temperatures sensing, and over voltage and over current sensing and protection.