US 8,102,286 B2
Capacitive keyboard with non—locking reduced keying ambiguityGeneral
US 8,102,286 B2
Capacitive keyboard with non—locking reduced keying ambiguity
Tech Center:
2600 Communications
Examiner:
Albert Wong
Art Unit:
2612 Computer Graphic Processing, 3D Animation, Display Color Attribute, Object Processing, Hardware and Memory
Agent:
Inventors:
Harald Philipp
Assignee:
Priority:
07/12/02
Filed:
10/06/10
Granted:
01/24/12
Expiration:
02/26/24
Abstract
Keyboards, keypads and other data entry devices can suffer from a keying ambiguity problem. In a small keyboard, for example, a user's finger is likely to overlap from a desired key to onto adjacent ones. An iterative method of removing keying ambiguity from a keyboard comprising an array of capacitive keys involves measuring a signal strength associated with each key in the array, comparing the measured signal strengths to find a maximum, determining that the key having the maximum signal strength is the unique user-selected key, and maintaining that selection until either the initially selected key's signal strength drops below some threshold level or a second key's signal strength exceeds the first key's signal strength.
Cooperative Patent Classification (CPC)
H03H03K2217/960755H03KG06F3/0237G06F