Touch screen including P-type transistor and applied with programmable voltage
US11455057B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 3, 2021 |
| Grant date | Sep 27, 2022 |
| Priority date | — |
| Expiry date | Jun 3, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/0443
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An object of the present invention is to efficiently reduce the number of signal lines of a control port and an input port of a sensor switch required for controlling a touch by supplying a programmable voltage from a touch drive IC TDI, not a separate external voltage source, as a voltage applied to a touch sensor. The present invention provides a touch screen which is capable of implementing low power consumption, low-resistance signal wiring, touch IC price reduction, and the like by forming a switching transistor of the sensor switch only with a P-type transistor manufactured in a Low Temperature Poly Silicon (LTPS) process, and driving the switching transistor without using a negative voltage (−V).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.