Patent · US Active

Lighting device

US11549653B2 · kind B2 · utility

0Cited by

1References

13Claims

0Family size

Assignee

LUMILEDS LLC · US

Inventors

Barbara Muelders · Aachen, DE
Floris Maria Hermansz Crompvoets · Bunde, NL
Benno Spinger · Aachen, DE

Key dates

Filing date	Dec 16, 2021
Grant date	Jan 10, 2023
Priority date	—
Expiry date	Dec 16, 2041

Classification

Technology area (CPC H)Electricity
CPC primaryH10H20/84
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A lighting device according to the invention comprises at least one semiconductor layer; at least one light emission surface comprising an array of high luminance areas configured to emit light at a first local luminance level and low luminance areas configured to emit no light or to emit light at a second local luminance level lower than the first local luminance level; a plurality of semiconductor light emitting devices formed in the semiconductor layer to define the plurality of high luminance areas; wherein the high luminance areas and the low luminance areas are arranged in accordance with a predefined light emission profile of the light emission surface.

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