Invention Grant
- Patent Title: Touch-and-display device and sensing system with peripheral electrode for transmitting uplink signal
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Application No.: US16662007Application Date: 2019-10-23
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Publication No.: US11294497B2Publication Date: 2022-04-05
- Inventor: Hui-Min Wang , Ren-Hao Ye
- Applicant: HIMAX TECHNOLOGIES LIMITED
- Applicant Address: TW Tainan
- Assignee: HIMAX TECHNOLOGIES LIMITED
- Current Assignee: HIMAX TECHNOLOGIES LIMITED
- Current Assignee Address: TW Tainan
- Agency: CKC & Partners Co., LLC
- Main IPC: G06F3/041
- IPC: G06F3/041 ; G06F3/044 ; G02F1/1333 ; G02F1/1335 ; G06F3/0354

Abstract:
The touch-and-display panel includes multiple sensing electrodes in the display area. A circuit is disposed in the non-display area and electrically connected to the sensing electrodes through sensing lines. A peripheral electrode is disposed in the non-display area. In a display period, the circuit applies a common voltage to the sensing electrodes through the sensing lines. In a touch sensing period, the circuit transmits a touch sensing signal to the sensing electrodes through the sensing lines, and determines whether each of the sensing electrodes is touched based on capacitance of the sensing electrodes. In a stylus sensing period, the circuit transmits an uplink signal to the sensing electrodes and the peripheral electrode, and receives a downlink signal from the active stylus through the sensing electrodes, and determines a stylus location corresponding to the active stylus according to the downlink signal.
Information query