EP0489344A1
Expired / Lapsed
EP
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Method for identifying an activated key of a keyboard
Assignee: IEE International Electronics and Engineering SA
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Filing: 1991-11-27
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Granted: —
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Expires: 2011-11-27
Abstract
Abstract The keyboard consists of a grid of individual keys, each associated with a force sensor whose electrical resistance decreases proportionally with a force applied to its surface. To identify an activated key, identification signals are injected onto the rows and the sought-after row is identified from the signals collected on the terminals. The sought-after column is determined similarly by injecting identification signals into the columns. <IMAGE>
Inventors
- 👤 Rudi Rohde
- 👤 Bogdan C. Serban
- 👤 Michel Witte
- 👤 Jannick Hagen
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-29 12:24
CPC Classifications
H; H01; H01H; H01H13/00; H01H13/70; H01H13/78; H01H13/785; H01H13/702; H03; H03K; H03K17/00; H03K17/94; H03K17/96; H03K17/9618; H03K17/9625; H03M; H03M11/00; H03M11/22; H01H2201/00; H01H2201/022; H01H2201/032; H01H2201/036; H01H2219/00; H01H2219/002; H01H2227/00; H01H2227/002; H01H2227/004; H01H2231/00; H01H2231/034; H01H2239/00; H01H2239/038
Claims Analysis
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GB2047448A
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