Patent · US Active

Background illumination by non-electrical energy sources

US7798661B2 · kind B2 · utility

0Cited by

5References

18Claims

0Family size

Assignee

VEGA Grieshaber KG · DE

Inventor

Holger Staiger · Lindlar, DE

Key dates

Filing date	Jun 18, 2007
Grant date	Sep 21, 2010
Priority date	—
Expiry date	Oct 16, 2027

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF21K2/06
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

Described is an illumination unit for a field-device display module. The illumination unit generates luminescence light as background illumination for the display. In this arrangement, the illumination element comprises a chemiluminescence element or a radioactive element that generates ionising radiation for exciting a phosphorescence layer.

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