Patent · US Expired

Keypad illuminating system for a data processing device

US6834975B2 · kind B2 · utility

46Cited by

4References

19Claims

0Family size

Assignee

WISTRON CORPORATION · TW

Inventors

Tsai Chu-Chia · Taipei, TW
Li Chien-Te · Taipei, TW
Lee Cheng-Chang · Taipei, TW
Hung Huang-Lung · Taipei, TW

Key dates

Filing date	Dec 11, 2002
Grant date	Dec 28, 2004
Priority date	—
Expiry date	Apr 7, 2023

Classification

Technology area (CPC G)Physics
CPC primaryG06F3/0202
WIPO fieldComputer technology
WIPO sectorElectrical engineering

Abstract

A keypad illuminating system for a data processing device includes a keypad, a light source, and a photoluminescent substance. The light source is adapted to be mounted on the data processing device for illuminating the keypad. The photoluminescent substance is associated with the keypad for emitting visible light in response to the light emitted from the light source.

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