Electromagnetic touch screen and electromagnetic touch device
US12147640B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 15, 2022 |
| Grant date | Nov 19, 2024 |
| Priority date | — |
| Expiry date | Dec 22, 2042 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/0412
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An electromagnetic touch device and an electromagnetic touch screen are provided. The electromagnetic touch device includes the electromagnetic touch screen. The electromagnetic touch screen is coupled with a stylus. The electromagnetic touch screen includes transmitting coils and receiving coils. The transmitting coils are correspondingly arranged in a peripheral area around the receiving coils. During interaction between the stylus and the electromagnetic touch screen, the transmitting coils transmit transmitting signals to generate a first magnetic field through which the stylus is charged. When a touch operation is performed, the receiving coils generate receiving signals according to a second magnetic field generated by the stylus, a touch point of the stylus is obtained according to the receiving signals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.