LED-Lichtvorrichtung und Beleuchtungsvorrichtung, die diese Vorrichtung umfasst

Details

Veröffentlichungs-Nr.

EP2466993

Aktenzeichen

EP11009848

Anmeldetag

14. Dezember 2011

Veröffentlichung

1. Mai 2019

Erteilung

1. Mai 2019

Rechtsraum

EP

IPC

H05B33/08

Abstract

An LED lighting device includes a step-up chopper which includes a first switching element and increases an output voltage applied from a DC power supply, a step-down chopper which includes a second switching element and decreases the output voltage from the step-up chopper to apply the decreased output voltage to a light source unit having light emitting diodes, a controller which controls operations of the first and the second switching element, a current limiter which includes a current limiting element and a switch; and a voltage detection unit. The controller stops an operation of the first switching element when the voltage detection unit detects the voltage applied to the light source unit exceeding a predetermined voltage value, and the switch allows a current to flow through the path passing through the current limiting element when the operation of the first switching element is stopped.

Anmelder

Firmen

Panasonic Intellectual Property Management Co., Ltd.
Panasonic Corporation
Panasonic Electric Works Co., Ltd.

Land

🇯🇵 Japan

Fachgebiete