Patent · US Expired

Portable electronic apparatus with controlled light sources

US7245228B2 · kind B2 · utility

1Cited by

3References

26Claims

0Family size

Assignee

Nokia · FI

Inventors

Thomas Fussinger · Mindelheim, DE
Victor Burger · Blaustein, DE
Maik Kobald · Forchtenberg, DE
Panu Johansson · Copenhagen, DK

Key dates

Filing date	May 27, 2004
Grant date	Jul 17, 2007
Priority date	—
Expiry date	Nov 8, 2024

Classification

Technology area (CPC G)Physics
CPC primaryG09G3/32
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A portable electronic apparatus has light sources that can be controlled to produce decorative or informational effects. Each light source is controlled by the combination of an enable signal from a 1-bit port of a controller and a PWM signal from a PWM signal from the controller. Each PWM signal is used to control a plurality of light sources in parallel whereas each 1-bit enabled signal controls, generally, only one. The light sources are preferably arranged to shine through soft structures on the apparatus.

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