Patent · US Active

Adjustable illumination devices

US9580644B2 · kind B2 · utility

0Cited by

2References

14Claims

0Family size

Assignee

PHILIPS LIGHTING HOLDING B.V. · NL

Inventors

Gongming Wei · Shanghai, CN
Yadong Liu · Woodland, US
Henk van Houten · Eindhoven, NL
Bo Liu · Sichuan, CN
Hugo Johan Cornelissen · Escharen, NL
Xiaoyan Zhu · Shanghai, CN
Cornelis Reinder Ronda · Aachen, DE
Hendrikus Albertus Adrianus Maria de Ruijter · Shanghai, CN

Key dates

Filing date	Dec 22, 2009
Grant date	Feb 28, 2017
Priority date	—
Expiry date	Nov 16, 2031

Classification

Technology area (CPC G)Physics
CPC primaryG02B6/0035
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

To improve the illumination efficiency of hand-held illumination devices, this invention proposes a new illumination device having the “rolling” function, which is capable of illuminating the target area on which a user is currently focusing and rolling the illuminated area as the user is reading forward or backward. The illumination device comprises two pluralities of lighting elements, an illuminating body and a controller. The controller can control one plurality of lighting elements to emit light to illuminate a part of the illuminating body, which can further deflect the light to a part of the surface of the target.

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