Invention Application
- Patent Title: TOUCH DETECTION CIRCUIT WITH DIFFERENT CHARGING AND DISCHARGING CURRENTS AND OPERATING METHOD THEREOF
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Application No.: US16930348Application Date: 2020-07-16
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Publication No.: US20220021388A1Publication Date: 2022-01-20
- Inventor: SUNG-HAN WU
- Applicant: PixArt Imaging Inc.
- Applicant Address: TW Hsin-Chu County
- Assignee: PixArt Imaging Inc.
- Current Assignee: PixArt Imaging Inc.
- Current Assignee Address: TW Hsin-Chu County
- Main IPC: H03K17/96
- IPC: H03K17/96
Abstract:
There is provided a touch detection circuit including a charging circuit, a discharging circuit, a counter and a processor. The charging circuit charges a detection capacitor within a charging interval using different currents. The discharging circuit discharges the detection capacitor within a discharging interval using different currents. The counter counts the charging interval and the discharging interval. The processor subtracts a baseline time from a counted charging time and a counted discharging time to cancel the noise interference.
Public/Granted literature
- US11456740B2 Touch detection circuit with different charging and discharging currents and operating method thereof Public/Granted day:2022-09-27
Information query
IPC分类:
