Calibration techniques in haptic systems
US10818162B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 14, 2016 |
| Grant date | Oct 27, 2020 |
| Priority date | — |
| Expiry date | Dec 20, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10K11/34
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A system providing various improved calibration techniques for haptic feedback is described. An acoustic field is defined by one or more control points in a space within which the acoustic field may exist. Each control point is assigned an amplitude value equating to a desired amplitude of the acoustic field at the control point. Because complete control of space is not possible, controlling the acoustic field at given points yields erroneous local maxima in the acoustic field levels at other related positions. In relation to mid-air haptic feedback, these can interfere in interactions with the space by creating secondary effects and ghost phenomena that can be felt outside the interaction area. The level and nature of the secondary maxima in the acoustic field is determined by how the space is controlled. By arranging the transducer elements in different ways, unwanted effects on the acoustic field can be limited and controlled.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.