Capacitive micromachined ultrasonic transducer (CMUT) multi-touch and slider detection with improved pixel area coverage and ultrasonic feedback by a same pixel array
US12399592B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 18, 2023 |
| Grant date | Aug 26, 2025 |
| Priority date | — |
| Expiry date | Sep 18, 2043 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/043
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An ultrasonic touch sensor includes a touch structure having a touch surface with a plurality of sensitive areas, a pixel array of capacitive ultrasonic transducers, and a sensor circuit. Each pixel includes a respective ultrasonic transmitter and a respective ultrasonic receiver and is configured to monitor for a touch at a respective first sensitive area and at a respective second sensitive area. Moreover, each pixel is configured to generate a measurement signal that is representative of a first respective ultrasonic reflected wave reflected by the touch interface at the respective first sensitive area or that is representative of a second respective ultrasonic reflected wave reflected by the touch interface at the respective second sensitive area. The sensor circuit is configured to determine whether the measurement signal of a respective pixel corresponds to the respective first sensitive area or to the respective second sensitive area associated with the respective pixel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.