Mutual capacitive force sensor and touch display device with force sensing function and force sensing method thereof
US10452215B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 4, 2017 |
| Grant date | Oct 22, 2019 |
| Priority date | — |
| Expiry date | Oct 6, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2203/04104
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A touch display device with a force sensing function is provided. The touch display device includes a touch display panel, a backlight circuit and a force sensor. The backlight circuit is disposed on a back surface of the touch display panel. The force sensor includes a first conductive layer, a second conductive layer, an insulation layer and a third conductive layer. The first conductive layer is disposed between the touch display panel and the backlight circuit, the second conductive layer is disposed between the first conductive layer and the backlight circuit, and the insulation layer is disposed between the first conductive layer and the second conductive layer. The backlight circuit is disposed between the second conductive layer and the third conductive layer. The first conductive layer, the second conductive layer and the third conductive layer are electrically insulated from one another.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.