Patent ID: 6912280
Filing Date: 2005-06-28
Classification: E05F,H01H

Abstract:
1. A keypad device comprising: a flexible substrate having a plurality of keys affixed thereon and further comprising a plurality first conductive strips wherein each first conductive strip is associated with one of said plurality of keys; and a keypad cover attached to said flexible substrate, said keypad cover comprising a plurality of second conductive strips wherein each second conductive strip selectively contacts a corresponding first conductive strip on the flexible substrate, wherein the default position of the keypad device is closed wherein each first conductive strip associated with a key is in contact with its corresponding second conductive strip, and the plurality of first conductive strips is coupled to ground and the plurality of second conductive strips is coupled to logic circuitry such that when a key is depressed to the point that the first conductive strip associated with the key is separated from the second conductive strip corresponding to the first conductive strip, the short circuit condition is removed allowing a signal to be transmitted to said logic circuitry indicating that the key has been depressed.