Multi-Speaker Amplifier Control for Thermal Speaker Protection
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Solution Overview
Problem
Electronic devices with multiple speakers face challenges in efficiently managing temperature to prevent component deformation and audio quality degradation, as existing methods rely on individual amplifiers for each speaker, leading to increased complexity and resource usage.
Innovation Solution
An electronic device design where multiple speakers are connected to a single amplifier, with a processor using output control methods to determine and adjust voltage based on temperature thresholds, ensuring each speaker's temperature does not exceed configured limits, thereby preventing damage and maintaining audio quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If one amplifier is connected to one speaker with individual temperature measurement, then temperature control precision is improved, but device complexity and resource usage increase
Solution Approach 1:
The patent merges multiple speaker channels into a single amplifier unit. The amplifier is configured to amplify audio signals for multiple speakers (e.g., left and right channel speakers) simultaneously, eliminating the need for separate amplifiers for each speaker. This reduces device complexity and resource usage while maintaining temperature control capabilities through shared monitoring of the common amplifier temperature.
Solution Approach 2:
The single amplifier serves multiple functions by amplifying audio signals for multiple different speakers. The temperature monitoring system also serves a universal purpose by monitoring the amplifier's temperature to protect all connected speakers from thermal damage, rather than requiring dedicated monitoring for each speaker-amplifier pair.
2Power
If voltage supplied to speaker exceeds rated voltage, then audio output power is improved, but speaker temperature increases causing component deformation
Solution Approach 1:
The patent implements a feedback mechanism where the processor continuously monitors the temperature of the amplifier (which is thermally coupled to the speakers) and adjusts the voltage supplied to the speakers in real-time. When the temperature exceeds a threshold, the processor reduces or blocks the voltage supply to prevent further temperature increase and potential component deformation, thus maintaining audio output power within safe limits.
Solution Approach 2:
The system performs preliminary temperature monitoring and predictive voltage adjustment. Before the speaker temperature reaches dangerous levels, the processor detects temperature trends and proactively adjusts the voltage supply to prevent overheating. This preliminary action prevents component deformation before it occurs, rather than reacting after damage has begun.
3Device complexity
If multiple speakers are connected to one amplifier, then device complexity is reduced, but temperature management difficulty increases
Solution Approach 1:
The patent introduces the amplifier as a thermal intermediary that couples all speakers to a single temperature monitoring point. Instead of measuring each speaker's temperature individually, the system measures the amplifier's temperature, which serves as a representative indicator for all connected speakers. This intermediary approach simplifies temperature management while maintaining effective monitoring of the entire speaker system.
Data Source
AI summary
According to an embodiment, an electronic device may include: a first speaker configured to output a first audio signal corresponding to a first frequency band, a second speaker configured to output a second audio signal corresponding to a second frequency band at least partly different from the first frequency band, at least one amplifier configured to provide a first output signal for controlling output of the first speaker and a second output signal for controlling output of the second speaker, and at least one processor, comprising processing circuitry, operatively connected to the at least one amplifier. At least one processor, individually and/or collectively, may be configured to determine the first output signal, at least partly based on a first output control method; output the first audio signal, at least partly based on the first output signal, using the first speaker connected to the at least one amplifier; determine the second output signal, at least partly based on a second output control method; and output the second audio signal, at least partly based on the second output signal, using the second speaker connected to the at least one amplifier.