Patent · US Expired

Device for inputting data

US6504143B2 · kind B2 · utility

55Cited by

7References

16Claims

0Family size

Assignee

DEUTSCHE TELEKOM AG · DE

Inventors

Hans Koops · Ober-Ramstadt, DE
Ulrich Koops · Ober-Ramstadt, DE

Key dates

Filing date	Sep 10, 1999
Grant date	Jan 7, 2003
Priority date	—
Expiry date	Sep 10, 2019

Classification

Technology area (CPC H)Electricity
CPC primaryH01J2231/50068
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

In an apparatus for the input of information, it is provided that a raster or an array of light-emitting screen elements is associated with a raster or an array of photodetectors, the light emitted by at least one of the screen elements being reflected to at least one of the photodetectors when an object approaches the apparatus; it is further provided that output signals of the photodetectors are used to obtain information on which of the photodetectors are receiving reflected light.

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