Audio Haptic Current Management in Portable Electronics
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Solution Overview
Problem
Portable electronic devices face challenges in managing the simultaneous operation of haptic motors and audio outputs, as the combined current demand often exceeds the maximum allowable discharge current, leading to reduced battery lifespan and heat generation.
Innovation Solution
An electronic device is configured with processing circuitry that estimates the discharge current value associated with both audio and haptic signals. When this value exceeds a specified limit, the device adjusts either the audio volume or the haptic motor driving voltage to ensure the total discharge current remains within safe limits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If haptic motor driving operation and audio output operation are performed simultaneously, then user experience is improved, but discharge current exceeds maximum allowable limit
Solution Approach 1:
The patent applies time-division multiplexing to alternately activate the haptic motor and audio output operations. The processor controls the haptic motor driving circuitry and audio circuitry to operate in alternating time slots, ensuring that the instantaneous discharge current from either component does not exceed the maximum allowable limit while still providing both functionalities to the user.
Solution Approach 2:
The patent dynamically adjusts the operating parameters of the haptic motor and audio output based on real-time current consumption monitoring. The processor modulates the driving voltage to the haptic motor and audio signal levels to ensure that the combined discharge current remains within safe operational limits, allowing flexible adaptation to different operational conditions.
2Productivity
If discharge current is increased to meet simultaneous haptic and audio demands, then operational capability is improved, but battery lifespan is shortened
Solution Approach 1:
By implementing periodic alternation between haptic motor and audio output operations, the patent prevents sustained high current draw from the battery. This time-division approach ensures that the battery discharges at controlled intervals rather than continuous peak loads, thereby extending battery lifespan while maintaining operational capability when needed.
3Productivity
If discharge current is increased for simultaneous operations, then functional performance is improved, but heat generation increases
Solution Approach 1:
The patent utilizes periodic time-division operation to alternate between haptic motor and audio output, preventing continuous high current flow that would generate excessive heat. This approach maintains functional performance during active periods while allowing thermal dissipation during inactive periods, thus controlling overall heat generation in the device.
Data Source
AI summary
An electronic device according to an embodiment may include: a battery, a haptic motor, a speaker, haptic motor driving circuitry, audio circuitry, at least one processor, comprising processing circuitry, and memory storing instructions, wherein the at least one processor, individually and/or collectively, is configured to execute the instructions and to cause the electronic device to: output, through the speaker, audio signals corresponding to audio data using the audio circuitry, based on haptic signals being output concurrently with output of audio signals through the speaker, identify the audio signals to be output and the haptic signals to be output, estimate a discharge current value of the battery associated with the audio signals to be output concurrently with output of the haptic signals, and, based on the estimated discharge current value exceeding a specified discharge current value, adjust volume associated with the audio signals to be output and/or a driving voltage for driving the haptic motor in association with the haptic signals to be output such that the discharge current value of the battery due to the output of the audio signals and haptic signals does not exceed the specified discharge current value.