Touch sensitive device

Details Touch sensitive device Touch sensitive device

H - Electricity

03

M

340/179, 88/113.

H03M 11/00 (2006.01) G06F 3/033 (2006.01) H03K 17/969 (2006.01)

Patent

CA 1225723

ABSTRACT TOUCH SENSITIVE DEVICE There is disclosed a tactile sensor comprised of a compliant overlay having a surface of spatially dispersed semi-spherical domes in registration with sequentially pulsed signal means, such as light emitting diodes. The domes adaptively collapse upon the application of pressure applied to the opposite surface of the overlay entrapping signals by relection between the overlay surfaces. The entrapped signals migrate by reflection to the edges of the overlay for reception by photodetectors. The output from the photodetectors is then processed for determining the magnitude, location and profile of the pressure applied across the overlay. A feedback arrangement is also provided for controlling the magnitude of the externally applied pressure. DSW/KW.

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