Patent · US Active

Ultrasonic touch sensor with backlight

US12079431B1 · kind B1 · utility

0Cited by

0References

25Claims

0Family size

Assignee

Infineon Technologies AG · DE

Inventors

Klaus Elian · Alteglofsheim, DE
Derek Debie · Bogen, DE
Fabian Streb · Regensburg, DE

Key dates

Filing date	Sep 13, 2023
Grant date	Sep 3, 2024
Priority date	—
Expiry date	Sep 13, 2043

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF21Y2115/10
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.