Invention Grant
- Patent Title: Capacitive touch screen including a first sensor pattern for mutual sensing and a second sensor pattern for self sensing
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Application No.: US14269295Application Date: 2014-05-05
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Publication No.: US09626049B2Publication Date: 2017-04-18
- Inventor: Praveesh Chandran , Chee Yu Ng
- Applicant: STMicroelectronics Asia Pacific Pte Ltd
- Applicant Address: SG Singapore
- Assignee: STMicroelectronics Asia Pacific Pte Ltd
- Current Assignee: STMicroelectronics Asia Pacific Pte Ltd
- Current Assignee Address: SG Singapore
- Agency: Gardere Wynne Sewell LLP
- Main IPC: G06F3/044
- IPC: G06F3/044 ; G06F3/041

Abstract:
A capacitive touch panel includes a first sensor pattern and second sensor pattern. The first sensor pattern supports mutual-capacitance detection and the second sensor pattern supports self-capacitance detection. The first sensor pattern includes row conductors and column conductors which intersect each other at mutual-capacitance sensing locations. The second sensor pattern includes island conductors. The island conductors are grouped in clusters of conductors, each cluster providing a self-capacitance sensing location. Control circuitry coupled to the first and second sensor patterns functions to make touch/hover position detections by sensing changes in capacitance at the mutual-capacitance and self-capacitance nodes. The row and column conductors include openings, and the island conductors are positioned in vertical alignment with corresponding openings in the conductors.
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