Patent · US Active

Apparatus and method for LED running light control and status

US9844117B2 · kind B2 · utility

1Cited by

1References

23Claims

0Family size

Assignee

MICROCHIP TECHNOLOGY INCORPORATED · US

Inventors

Carlo Lombardi · Milano, IT
Andreas Reiter · Feldkirchen-Westerham, DE
Franz Thalheimer · Alzenau, DE
Frank Ziegenhorn · Höhenkirchen-Siegertsbrunn, DE

Key dates

Filing date	Aug 27, 2015
Grant date	Dec 12, 2017
Priority date	—
Expiry date	Sep 7, 2035

Classification

Technology area (CPC H)Electricity
CPC primaryH05B45/48
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A light emitting diode (LED) running light comprises a current sink and a plurality of series coupled LED block cells; each of the plurality of LED block cells comprising a LED and a bypass circuit to the current sink, wherein each series coupled LED sequentially turns on (lights) when a voltage source increases by additive voltage increments of at least the turn-on voltage of each LED in the series coupled string until all LEDs are on (lit). The current sink maintains a desired current value through the LEDs and may also be used to provide waveforms for diagnostic and timing purposes.

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