Display device configured to operate display drive and touch sensing in time sharing manner and semiconductor device to be employed thereon
US10372248B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 19, 2016 |
| Grant date | Aug 6, 2019 |
| Priority date | — |
| Expiry date | Jun 28, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2330/02
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The semiconductor device is intended for connection with an in-cell type display touch panel having a plurality of common electrodes, a reference voltage for display is applied to the common electrodes in a display drive period, and the common electrodes serve as sensor electrodes in a touch detection period. The semiconductor device includes a DC level shift circuit operable to shift the DC level of a toggle signal output by a toggle drive circuit to the reference voltage. The semiconductor device supplies the reference voltage to the common electrodes of the display touch panel in the display drive period, and performs a guarding action in which at least a part of the plurality of common electrodes is supplied with a toggle signal shifted in DC level in the touch detection period.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.