Patent · US Active

Backlighting apparatus for a keypad assembly

US8431849B2 · kind B2 · utility

59Cited by

11References

16Claims

0Family size

Assignee

RESEARCH IN MOTION LIMITED · CA

Inventor

Chao Chen · Kitchener, CA

Key dates

Filing date	Sep 24, 2010
Grant date	Apr 30, 2013
Priority date	—
Expiry date	Dec 28, 2030

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T29/49105
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A keypad assembly including a dome configured to operatively engage a switch sensor; a dome overlay guide operatively coupled by to the dome; a key corresponding to the dome and configured to operatively engage the dome; and a light emitting source, configured to emit light. The dome overlay guide is configured to receive the light emitted by the light emitting source and direct the received light toward the keys.

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