Patent · US Expired

Data input device

US7242388B2 · kind B2 · utility

79Cited by
21References
133Claims
0Family size

Assignee

Inventors

Key dates

Filing dateNov 26, 2001
Grant dateJul 10, 2007
Priority date
Expiry dateOct 14, 2022

Classification

  • Technology area (CPC H)Electricity
  • CPC primaryH03K2217/96046
  • WIPO fieldBasic communication processes
  • WIPO sectorElectrical engineering

Abstract

A data input device and method including an illuminator (106) operative to illuminate at least one engagement plane (102) by directing light along the at least one engagement plane, a two-dimensional imaging sensor (112) viewing the at least one engagement plane from a location outside the at least one engagement plane for sensing light from the illuminator (106) scattered by engagement of a data entry object (110) with the at least one engagement plane and a data entry processor receiving an output from the two-dimensional imaging sensor (112) and providing a data input to utilization circuitry.

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