US 12,181,147 B2Granted

Laser-based lighting device

AssigneeSignify Holding B.V.

InventorsRobert Van Asselt, Dominique Maria Bruls, Rifat Ata Mustafa Hikmet

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Abstract

This invention relates to a safety measure taken against unsafe exposure of high-intensity laser light that is relevant for the reliable and safer operation of laser-based lighting devices. According to this invention, a lighting device comprises a first light-emitting semiconductor device and a light-conversion device. The first light-emitting semiconductor device is a laser device configured to generate a first light output and the 5light-conversion device is configured to receive the first light output and convert at least part of the first light output into a converted light output. The lighting device further comprises an optical element configured to receive the converted light output from the light-conversion device. The optical element is configured to transmit the converted light output and the first light output, and attenuate the first light output above a threshold value of the first light output.

Claims16

Dependent claims

A lighting device comprising,

a first light-emitting semiconductor device, the first light-emitting semiconductor device being a laser device configured to generate a first light output,
a light-conversion device configured to receive the first light output and to convert at least part of the first light output into a converted light output to be directed in an illumination direction, and
an optical element configured to receive the converted light output from the light-conversion device,
wherein the optical element comprises a bistable optical material that can change from an optical transmissive state to an optical attenuative state depending on a threshold value of the first light output,
wherein the optical element is configured to transmit the converted light output and the first light output,
wherein the optical element is configured to attenuate the first light output above a threshold value of the first light output, and
wherein the optical element is configured for one of collimating, focusing, blurring, or diffusing light in the illumination direction.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 18/038,817Filed 25 Nov 2021
Priority: EP 202108771 Dec 2020
Published: US 2024/0210011 A127 Jun 2024
Granted: 31 Dec 2024
Term ends: Not estimatedThe source records don’t support an estimate.

Classification11 codes

F21V 9/40
Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters: with provision for controlling spectral…
F21V 25/02
Safety devices structurally associated with lighting devices: coming into action when lighting device is disturbed, dismounted, or broken
F21V 5/04
Refractors for light sources: of lens shape
F21V 9/30
Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters: elements containing photoluminescent…

Family

US 2024/0210011 A1Pre-grant publication · published 27 Jun 2024
US 12,181,147 B2This patent

From the US filing history. Foreign family members aren’t listed.

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