Patent · US Active

Illumination device for a motor vehicle, more particularly high-resolution headlamp

US12273970B2 · kind B2 · utility

0Cited by

0References

9Claims

0Family size

Assignee

Hella GmbH & Co. KGaA · DE

Inventors

Alberto Encinas · Lippstadt, DE
Florian Herold · Bielefeld, DE
Oliver Hetzel · Schwäbisch Gmünd, DE
Ingo Moellers · Rietberg, DE
Martin Pluempe · Paderborn, DE
Florian Turkewitsch · Lippstadt, DE

Key dates

Filing date	Mar 23, 2023
Grant date	Apr 8, 2025
Priority date	—
Expiry date	Jul 11, 2043

Classification

Technology area (CPC H)Electricity
CPC primaryH05B45/325
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

An illumination device having a light-emitting diode field and an adjustable current source for each LED. The current source delivers a pulse width modulated current having a pulse height. An open-loop/closed-loop controller is provided for the open-loop/closed-loop control of the brightness of the LEDs. A setpoint value for the pulse height can be produced for the current source. A brightness value can be specified for each LED in accordance with the setpoint value, encoded in a video signal, and provided at a video signal output. The light-emitting diode field has a decoder, which is connected to the video signal input and via which the brightness value can be decoded from the video signal and converted into a duty cycle with which the pulse height can be produced.

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