Optimizing pixel settling in an integrated display and capacitive sensing device
US9983721B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 31, 2015 |
| Grant date | May 29, 2018 |
| Priority date | — |
| Expiry date | Jul 24, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/13338
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An example method of performing capacitive sensing and display updating in an integrated capacitive sensing device and display device includes driving a plurality of display electrodes with one or more display voltages from one or more supplies during a first time period, the one or more voltages configured to drive the display pixels. The method further includes initiating a long horizontal blanking interval during a second time period. The method further includes driving a plurality of sensor electrodes with one or more sensing voltages from the one or more supplies during the second time period to perform capacitive sensing. The method further includes activating first circuitry during one of the first time period or the second time period to draw current to equalize power drawn from the one or more supplies during the first and second time periods within a threshold.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.