Safe operation of an led lamp

Patent metadata

Field	Value
Publication number	US-2016356473-A1
Application number	US-201515116519-A
Country	US
Kind code	A1
Filing date	Feb 3, 2015
Priority date	Feb 7, 2014
Publication date	Dec 8, 2016
Grant date	—

Abstract

A lamp and an operating method for a lamp with an LED element 22 are described. An electrical circuit with the LED element 22 is covered by a cover member 12. A separation device 28 is provided to mechanically severe the electrical conductor 16 a, 16 b arrange to supply electrical power to the LED element 22 if the detector element 24 detects a defect of the cover member 12.

First claim

1 . Lamp including
an electrical circuit with at least one LED element covered by a cover member, wherein a separation device is provided to mechanically severe at least one electrical conductor arranged to supply electrical power to said LED element if a detector element detects a defect of said cover member.

2 . Lamp according to claim 1 , wherein
said separation device comprises an impulse element provided to be triggered to provide a motion force for severing said electrical conductor.

3 . Lamp according to claim 1 , wherein said separation device is provided to be electrically triggered.

4 . Lamp according to claim 1 , wherein
an electrical triggering signal is provided through a triggering conductor electrically isolated from the electrical conductor.

5 . Lamp according to claim 1 , wherein
said impulse element comprises a chemical charge.

6 . Lamp according to claim 1 , wherein
said impulse element comprises a spring element.

7 . Lamp according to claim 1 , wherein
said impulse element comprises a driving coil to electrically propel a ferromagnetic element.

8 . Lamp according to claim 1 , wherein
said electrical conductor is a bond wire.

9 . Lamp according to claim 1 , wherein
said electrical conductor is provided on a first carrier part and on a second carrier part, wherein said conductor is severed by separating said first and second carrier parts.

10 . Lamp according to claim 1 , wherein
a plurality of breakage zones are arranged along the length of said electrical conductor, and said electrical conductor is severed at least in two of said breakage zones.

11 . Lamp according to claim 1 , wherein
a rectifier circuit and a driver circuit are arranged electrically between said LED element and electrical terminals, and said electrical conductor is connected between said electrical terminals and said rectifier circuit.

12 . Lamp unit according to claim 1 , wherein
a rectifier circuit and a driver circuit are arranged electrically between said LED element and electrical terminals, and said electrical conductor is connected between said rectifier circuit and said driver circuit.

13 . Lamp according to claim 1 , wherein
said detector element includes at least one conductive track provided on a breakable substrate.

14 . Method of operating a lamp, wherein
electrical power is supplied through at least one electrical conductor to an LED element, wherein a defect of a cover member covering an electrical circuit including the LED element is detected, and wherein said electrical conductor in case of detection of said defect is mechanically severed.

Assignees

• Philips Lighting Holding Bv

Inventors

• Van Delden Martinus Hermanus Wilhelmus Maria
• Den Boer Reinier Imre Anton
• Van Der Hoef Siebe-Jan

Classifications

• F21V25/04 Primary

  breaking the electric circuit · CPC title

• F21V23/005

  the substrate is supporting also the light source · CPC title

• F21Y2115/10

  Light-emitting diodes [LED] · CPC title

• H01H39/006

  Opening by severing a conductor · CPC title

• F21V3/061

  the material being glass · CPC title