Patent · US Active

Driver circuit with a semiconductor light source and method for operating a driver circuit

US11246194B2 · kind B2 · utility

0Cited by

12References

20Claims

0Family size

Assignee

Schott AG · DE

Inventors

Bernd Woelfing · Mainz, DE
Andreas Hatzenbuehler · Neu-Bamberg, DE

Key dates

Filing date	Jul 24, 2018
Grant date	Feb 8, 2022
Priority date	—
Expiry date	Jul 24, 2038

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02B20/40
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A driver circuit for a semiconductor light source and to a method for controlling the brightness thereof are provided. When a pulse width modulated semiconductor light source reaches a duty cycle threshold value, the voltage is increased or decreased through a variable voltage source in order to achieve a higher dynamic range.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.