Driving circuit and sensing unit thereof
US10452180B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 18, 2017 |
| Grant date | Oct 22, 2019 |
| Priority date | — |
| Expiry date | Jan 3, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/04184
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Provided is a driving circuit included in a touch display device, which is capable of performing display driving, touch sensing, and additional sensing in addition to the touch sensing. The driving circuit includes a common electrode driving controller, a pixel electrode driving controller, and a sending unit. The common electrode driving controller is configured to apply a common voltage to a common electrode during a display-driving period. The pixel electrode driving controller is configured to apply a data voltage to a pixel electrode during the display-driving period. The sensing unit is connected to the common electrode driving controller during a first sensing period and to the pixel electrode driving controller during a second sensing period. The sensing unit is configured to sense a change in capacitance between the common electrode or pixel electrode and an object that is in contact with the display panel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.