Headphone Optical Sensor Ear Detection Control
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Solution Overview
Problem
Existing headphone devices lack user-friendly playback control and power-saving features, as they often continue playing audio content when removed and fail to disable wireless connections when not in use, leading to reduced battery life and user inconvenience.
Innovation Solution
A circumaural headphone device equipped with an optical sensor on the baffle plate to detect ear presence, controlling audio playback and disabling wireless connections and power when not in use, ensuring seamless playback resumption and extended battery life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the headphone device automatically controls playback and disables connections when not in use, then user convenience and battery life are improved, but device complexity increases due to additional sensors and control systems
Solution Approach 1:
The optical sensor serves multiple functions: detecting ear presence to control playback and detecting absence to trigger power-saving mode. This multi-functionality reduces the need for separate sensors and control logic, thereby improving ease of operation without proportionally increasing device complexity.
Solution Approach 2:
The patent combines the playback control function and power management function into a single integrated system triggered by the same optical sensor. This merging of functions streamlines the control architecture, making the device easier to use while minimizing the increase in complexity through shared hardware and unified control logic.
2Measurement precision
If the headphone device uses an optical sensor to detect ear presence, then playback control accuracy is improved, but manufacturing cost increases
Solution Approach 1:
The optical sensor utilizes the user's own ear as the sensing target, eliminating the need for complex calibration or external reference objects. The ear's presence naturally blocks or reflects light in a detectable manner, providing accurate detection without requiring expensive precision calibration equipment or complex manufacturing processes.
Solution Approach 2:
The patent employs a simple optical sensor that can be manufactured at low cost, accepting that the sensor may have limited precision but is sufficient for the application. This approach prioritizes cost-effective manufacturing over high-precision detection, using the ear's natural optical properties rather than requiring expensive precision sensors.
3Duration of action of moving object
If the headphone device continuously plays audio content, then user experience is maintained, but battery consumption increases when the device is not in use
Solution Approach 1:
The system periodically checks ear presence using the optical sensor and automatically transitions between playback modes and power-saving modes based on detected conditions. This periodic monitoring enables the device to maintain audio playback during actual use while automatically entering low-power states when not in use, optimizing the balance between usage duration and battery consumption.
Solution Approach 2:
The optical sensor provides continuous feedback about ear presence to the control system, which automatically adjusts playback status and connection states. This feedback mechanism ensures the device plays audio only when needed (when the ear is detected) and enters power-saving mode when not in use, eliminating unnecessary battery consumption while maintaining user experience during actual usage periods.
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 solution provides a user-friendly and power-saving experience by automatically pausing audio when the headphones are removed and resuming playback when worn, while extending battery life by disabling connections and power when not in use.
Implementation Method 1
An optical sensor is installed on a baffle plate to sense whether the headphone device is worn by the user
Data Source
AI summary
A headphone device includes a sound outputting part and a sensor. The sound outputting part includes a case, a main board, a driving unit, a baffle plate and an ear pad. The sensor is installed on the baffle plate, uncovered by the ear pad and connected with the main board. If the human ear is sensed by the sensor, the main board judges that the headphone device is worn by the user. If the human ear is not sensed by the sensor, the main board judges that the headphone device is not worn by the user. According to the result of judging whether the headphone device is worn by the user, the playback of the audio content of an electronic device connected with the headphone device is correspondingly controlled.