Infineon Technologies Ag

Fabian Streb

Klaus Elian

Derek Debie

An ultrasonic touch sensor includes a housing having a package cavity; an ultrasonic transmitter arranged within the package cavity, and configured to transmit an ultrasonic transmit wave; an ultrasonic receiver arranged within the package cavity, and configured to receive an ultrasonic reflected wave produced by a reflection of the ultrasonic transmit wave and generate a measurement signal representative of the ultrasonic reflected wave; a measurement circuit arranged within the package cavity and coupled to the ultrasonic receiver, and configured to detect a touch or a non-touch based on the measurement signal; a light source configured to produce an activating light; and a coupling medium that fills or at least partially fills the package cavity. The coupling medium includes a luminescent material that is configured to be activated by the activating light to produce a backlight that is emitted from the package cavity.

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Wuppertal, Germany

Fabian Streb