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:
Jan. 05, 2021
Filed:
Sep. 28, 2018
Zkw Group Gmbh, Wieselburg, AT;
Christian Guth, Mariasdorf, AT;
Harald Graf, Würflach, AT;
ZKW Group GmbH, Wieselburg, AT;
Abstract
A circuit arrangement () for generating a reference voltage (U) for the power supply () of an LED arrangement (LED), wherein the power supply supplies a feed current (I) to the LED arrangement on the basis of an input voltage (U), which current is determined by the magnitude of the reference voltage, wherein the circuit arrangement comprises: a first voltage divider (R/R), located on a constant power supply voltage (U), a second voltage divider (R/R), located on the input voltage (U) of the power supply (), and a third voltage divider (R/R) which consists of an ohmic resistor (R) and a temperature-dependent resistor (R) thermally coupled to the LED arrangement, a voltage proportional to the voltage on the centre connection of the second voltage divider (R/R) is supplied via a first diode (D) to the centre connection of the first voltage divider (R/R), a voltage proportional to the voltage on the centre connection of the third voltage divider (R/R) is further supplied via a second diode (D) to the centre connection of the first voltage divider (R/R), and the voltage on the centre connection of the first voltage divider (R/R) is supplied to the power supply () as a reference voltage (U).