Operation detection device for electrostatic capacitance sensor

By configuring an illumination device near the electrostatic capacitance sensor and dynamically adjusting the baseline to adapt to temperature changes, the problem of false detection when the illumination is on is solved, and accurate operation detection near the electrostatic capacitance sensor is achieved.

CN122408835APending Publication Date: 2026-07-17ALPS ALPINE CO LTD

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
ALPS ALPINE CO LTD
Filing Date
2026-01-09
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

Existing technologies make it difficult to accurately detect user actions when illumination is applied near the electrostatic capacitive sensor, potentially leading to false detections and malfunctions.

Method used

By placing an illumination device near the electrostatic capacitance sensor, the baseline is dynamically adjusted using a baseline setting unit and an illumination control unit to adapt to temperature changes caused by the illumination device being turned on. Combined with a RAW detection unit and an operation detection unit, accurate detection of user operations is achieved.

Benefits of technology

When the lighting device is turned on, it can accurately detect the user's operation, avoid false detection, and improve the accuracy and reliability of operation detection.

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Abstract

提供不会因LED点亮引起的温度上升而误动作的静电电容传感器的操作检测装置。在静电电容传感器(1)的静电电容值RAW未超过对基线BL加上操作发生预测阈值Th2而得到的值时,将基线BL更新为追随RAW。如果RAW超过基线BL加上Th2的值,则基线BL的当前的值固定。如果RAW比被固定的基线BL大超过Th1(Th1>Th2),则检测用户的操作,并响应于此点亮LED(5)。如果LED(5)点亮,则将基线BL增加由LED(5)的点亮引起的温度上升所导致的静电电容传感器(1)的静电电容的增加量A。
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