Fingerprint identification structure, driving method thereof and electronic device
US11908224B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 21, 2021 |
| Grant date | Feb 20, 2024 |
| Priority date | — |
| Expiry date | May 21, 2041 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB06B1/0692
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Disclosed are a fingerprint identification structure, a driving method thereof and an electronic device. The fingerprint identification structure includes: a driving electrode layer; a piezoelectric material layer; a receiving electrode layer, which includes M receiving electrodes; an auxiliary driving electrode layer, which is located at the side of the piezoelectric material layer away from the receiving electrode layer, and is arranged in a layer different from the driving electrode layer; and a first insulating layer, the auxiliary driving electrode layer includes N auxiliary driving electrodes; the N driving electrodes and the N auxiliary driving electrodes are alternately arranged; and the orthographic projection, on the piezoelectric material layer, of an i-th auxiliary driving electrode overlaps with an interval between the orthographic projections, on the piezoelectric material layer, of an i-th driving electrode and an (i+1)-th driving electrode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.