Patent · US Active

LED driver with adaptive algorithm for storage capacitor pre-charge

US8044610B2 · kind B2 · utility

5Cited by

0References

17Claims

0Family size

Assignee

TEXAS INSTRUMENTS INCORPORATED · US

Inventors

Harald Sandner · Marzling, DE
Christophe Vaucourt · Munich, DE
Hans Schmeller · Nieheim, DE
Martin Rommel · Freising, DE
Helmut Kiml · Ramstein-Miesenbach, DE

Key dates

Filing date	Oct 29, 2008
Grant date	Oct 25, 2011
Priority date	—
Expiry date	Jan 14, 2030

Classification

Technology area (CPC H)Electricity
CPC primaryH05B45/38
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A method is provided for driving a plurality of light emitters in a plurality of output paths with each output path including at least one light emitter. The method includes the steps of applying a supply voltage level to a plurality of output paths; generating a current for each path during a period of a predetermined length for the output path; sensing a current level for each output path during the period; comparing each sensed current level with a reference level; increasing the supply voltage level if the sensed current level is lower than the reference level; determining a lowest supply voltage level for the worst case output path; and using the lower supply voltage level as a common supply voltage level for all output paths.

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