操作检测装置
By changing the frequency of the drive signal during non-sensing periods to offset the noise phase difference, the problem of noise affecting detection accuracy is solved, and high-precision operation detection is achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- ALPS ALPINE CO LTD
- Filing Date
- 2022-02-25
- Publication Date
- 2026-07-17
AI Technical Summary
In the prior art, when the noise frequency is close to the driving frequency, the detection accuracy of the operation detection device may decrease, and the possibility of noise being misjudged as touch operation increases.
By performing frequency hopping during non-sensing periods, the frequency of the drive signal is changed to offset the phase difference of the noise, so that the phase difference between the drive signal and the noise changes randomly during the sensing period, thus distinguishing between changes in the detected value caused by noise and changes caused by human operation.
It effectively reduces the impact of noise on detection accuracy, improves the accuracy of operational detection, and can reliably distinguish changes in detection values caused by noise and human operation.
Smart Images
Figure CN117043542B_ABST