Patent · US Active

Controlling electroluminescent panels in response to cumulative utilization

US7932879B2 · kind B2 · utility

0Cited by

3References

12Claims

0Family size

Assignee

Sony Ericsson Mobile Communications AB · SE

Inventors

Kristian Bergfors · Lund, SE
Anders Larsson · Lotorp, SE
Mats Kleverman · Helsingborg, SE

Key dates

Filing date	May 8, 2007
Grant date	Apr 26, 2011
Priority date	—
Expiry date	Feb 23, 2030

Classification

Technology area (CPC G)Physics
CPC primaryG09G2360/144
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

An electronic device includes a light source, which generates light in response to a signal, and a controller. Because the luminosity of the light source decays over time, the controller generates a utilization value based on a cumulative time that the light source is emitting light, and regulates the signal that is provided to the light source in response to the utilization value to at least partially compensate for decay in the luminosity of the light source.

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