CONTINUOUSLY ACTUATABLE KEYS PERTAINING TO A KEYBOARD COMPRISING AN INTEGRATED SIGNAL DETECTION ELEMENT, AND METHOD FOR SIGNAL PROCESSING

WIPO Patent Application WO2004081958

A3

The aim of the invention is to develop a keyboard for compact mobile electronic appliances, said keyboard comprising an integrated signal detection element and enabling simple data input and simultaneous continuous control possibilities using a plurality of keys; an electronic inquiry mechanism for actuating the keys; and an evaluation method for a momentary key position during the continuous actuation of individual keys. To this end, keys which are applied in a mobile manner and provided with a spring suspension are mechanically coupled, on the lower side thereof, to a continuous strip conductor extending over at least one key and having a high electrical resistance, such that when the keys are actuated, the strip conductor comes into contact with another strip conductor, in the actuation position, said other strip conductor extending over all of the keys and having a low electrical resistance, and an analog-digital converter AD0 determines the electrical resistance or voltage drop between the strip conductor and an end of the strip conductor, said measuring value being unequivocally associated with a defined key and the actuation position on said key.

VOELCKERS OLIVER (DE)

PCT/EP2004/002392

November 04, 2004

March 09, 2004

Click for automatic bibliography generation  

VOELCKERS OLIVER (DE)

G06F3/023; G06F3/033; G06F3/0338; H01H13/702; H03M11/24; (IPC1-7): H01H13/70; G06F3/033; H03M11/24

EP0136630A2	1985-04-10
US4987372A	1991-01-22
US5815139A	1998-09-29
US6377685B1	2002-04-23
US5550339A	1996-08-27
US4975676A	1990-12-04

View/Download PDF      PDF Help

Previous Patent: SINGLE TONE DETECTION AND ADAPTIVE GAIN CONTROL FOR DIRECT CONVERSION RECEIVERS

Next Patent: THIN SWITCH AND DISPLAY PANEL WITH SWITCH