MIPI Frequency Adjustment for Speaker Interference
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Solution Overview
Problem
The interference between the mobile industry processor interface (MIPI) of a display screen and a speaker's operating frequency causes noise or POP sounds during audio playback, which existing hardware upgrades cannot fully address without increasing costs and affecting playback quality.
Innovation Solution
A method that dynamically adjusts the MIPI operating frequency of a display screen to a target frequency based on real-time audio data analysis, ensuring that the percentage of interfered audio is below a threshold, thereby reducing electromagnetic interference with the speaker's operating frequency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the MIPI operating frequency is adjusted to avoid interference with the speaker frequency, then audio playback quality is improved, but display screen performance may deteriorate
Solution Approach 1:
The MIPI operating frequency is dynamically adjusted based on the speaker's operating frequency. The system continuously monitors the speaker frequency and adapts the MIPI frequency in real-time to avoid harmonic interference, rather than using a fixed frequency approach. This dynamic adaptation allows the system to maintain optimal display performance while eliminating audio interference.
Solution Approach 2:
The patent changes the MIPI operating frequency parameter to avoid harmonic relationships with the speaker frequency. By modifying this electrical parameter and establishing a new frequency setting that does not create integer multiple relationships with the speaker operating frequency, the system eliminates electromagnetic interference while maintaining display functionality.
2Object-affected harmful factors
If hardware upgrades are implemented to reduce interference, then audio playback quality is improved, but device cost increases
Solution Approach 1:
The patent replaces hardware-based interference reduction solutions with a software-controlled frequency adjustment mechanism. Instead of adding physical shielding, filters, or separate frequency synthesis hardware, the system uses firmware to dynamically configure the MIPI frequency based on the speaker's operating characteristics, thereby eliminating the need for additional hardware components.
Solution Approach 2:
The system performs self-diagnosis and self-adjustment by monitoring the speaker frequency and automatically configuring the MIPI frequency to avoid interference. The device serves itself by detecting the interference condition and implementing the frequency adjustment without requiring external hardware upgrades or manual intervention.
3Device complexity
If the MIPI operating frequency is fixed, then device complexity is reduced, but audio interference occurs when harmonic frequencies match speaker frequency
Solution Approach 1:
The patent transforms the fixed MIPI frequency into a dynamic parameter that adapts to the speaker's operating frequency. The system establishes a detection mechanism that identifies when the MIPI frequency or its harmonics match the speaker frequency, and automatically adjusts the MIPI frequency to eliminate the harmonic relationship, thereby preventing interference while maintaining operational simplicity.
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
This approach effectively minimizes interference between the MIPI and the speaker's frequency, enhancing audio playback quality without the need for hardware changes, thus improving the overall sound experience.
Implementation Method 1
if a crossover frequency or a frequency multiplication of the fixed frequency of the MIPI is equal to an operating frequency of the speaker, the crossover frequency or the frequency multiplication may interfere with the operating frequency the speaker
Data Source
AI summary
A method for controlling display and related products are provided. During outputting sound through a speaker of an electronic device, if an operating frequency of the speaker for playing the obtained first audio data is within an interference range of a first MIPI operating frequency of the MIPI of the display screen, and a percentage of interfered audio in the first audio data is greater than a first threshold, the first MIPI operating frequency of the MIPI of the display screen is adjusted to a target frequency such that a percentage of audio to be interfered in the first audio data is less than a second threshold, where second threshold is less than the first threshold.