Integrated Capacitive Electrode Layout for Earbud Wear and Touch Detection
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Solution Overview
Problem
Existing capacitance detection solutions for wireless earphones face challenges such as high power consumption, susceptibility to environmental interference, and increased costs due to the need for multiple chips for wearing detection and touch functions, as well as complex assembly processes that affect production efficiency and yield.
Innovation Solution
A capacitance detection apparatus with an integrated chip and detection electrode layer that eliminates the need for additional wiring, enhances waterproof design, and reduces assembly complexity by integrating the detection electrode directly onto the chip, allowing for simultaneous wearing detection and touch functions with improved accuracy and reduced cost.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an optical-based wearing detection solution is used, then wearing detection function is achieved, but power consumption increases and multiple chips are required for both wearing detection and touch functions
Solution Approach 1:
The patent combines the wearing detection electrode and touch detection electrode into a single integrated electrode structure. The detection electrode is formed as a conductive layer that simultaneously serves both wearing detection (by detecting capacitance changes when worn) and touch operations (by detecting capacitance changes on the surface). This eliminates the need for separate optical components and multiple chips, thereby reducing power consumption while maintaining both functions.
Solution Approach 2:
The detection electrode is designed to perform multiple functions: it detects whether the earphone is being worn by the user, and simultaneously detects touch operations on the surface. This multi-functional electrode replaces the need for separate optical detection components and touch control components, reducing system complexity and power consumption.
2Reliability
If an optical-based wearing detection solution is used, then wearing detection function is achieved, but the device complexity increases due to additional filters and light path openings
Solution Approach 1:
The patent merges the wearing detection and touch detection functions into a single electrode-based system. The detection electrode is formed as a conductive layer on the earphone housing that serves dual purposes: detecting wear status through capacitance changes and detecting touch operations. This eliminates the need for separate optical components, filters, and light path openings, thereby significantly reducing structural complexity.
3Reliability
If a capacitive wearing detection solution with separate detection electrode is used, then wearing detection function is achieved, but detection accuracy decreases due to environmental interference from circuit, water, sweat, temperature and humidity
Solution Approach 1:
The patent introduces a reference electrode that serves as an intermediary for environmental compensation. The reference electrode is positioned to be exposed to the same environmental conditions (temperature, humidity, sweat) as the detection electrode but does not detect wear status. By comparing the capacitance changes between the detection electrode and reference electrode, the system can distinguish between environmental interference and actual wear status, thereby improving detection accuracy.
4Reliability
If a capacitive wearing detection solution with separate detection electrode is used, then wearing detection function is achieved, but manufacturing complexity increases and production efficiency decreases
Solution Approach 1:
The patent combines the detection electrode and reference electrode into a single integrated electrode structure formed by depositing a conductive layer on the earphone housing. This integrated electrode eliminates the need for separate assembly steps for mounting individual electrodes, simplifying the manufacturing process and improving production efficiency while maintaining the wearing detection function.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The integrated solution improves detection accuracy, reduces production difficulties, and lowers system costs by enabling multiple functions like wearing detection and touch control with a single chip, while maintaining a waterproof design and minimizing environmental interference.
Implementation Method 1
the detection electrode layer 220 and the chip 213 are integrally disposed, the detection electrode layer 220 includes at least one detection electrode configured to form at least one capacitance detection channel
Data Source
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AI summary
Provided are a capacitance detection apparatus and an electronic device. The capacitance detection apparatus includes: a chip; and a detection electrode layer, where the detection electrode layer is integrally disposed with the chip and electrically connected to the chip, the detection electrode layer includes at least one detection electrode configured to form at least one capacitance detection channel, the at least one capacitance detection channel is respectively configured to output at least one capacitance detection signal, and the chip is configured to process the at least one capacitance detection signal. The capacitance detection apparatus avoids opening a hole on a surface of the electronic device, which is beneficial to a waterproof design of the capacitance detection apparatus, and can improve detection accuracy of the capacitance detection apparatus. Moreover, anti-interference ability of the capacitance detection apparatus can be improved, development (design) difficulty of an application circuit and a structural process of the capacitance detection apparatus can be reduced, mass production difficulty and assembly difficulty of the capacitance detection apparatus can be reduced, and production efficiency and mounting efficiency of the capacitance detection apparatus can be increased.