Display Panel Audio Gain Control to Prevent Image Shake
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Solution Overview
Problem
Video display panels that generate sound by vibrating cause image shake when the displayed video is dark or reflective, leading to discomfort for viewers/listeners due to the visual recognition of objects or reflections on the panel.
Innovation Solution
A signal processing device with a displacement detection unit, threshold setting unit, and gain adjustment unit that detects the displacement of the video display panel, calculates a threshold for image shake occurrence, and adjusts the audio signal level to prevent excessive vibration and image shake, using dynamic EQ to attenuate low-frequency components based on video luminance and environmental factors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the video display panel vibrates to generate sound, then sound generation function is improved, but image shake occurs causing visual discomfort
Solution Approach 1:
The patent implements dynamic gain adjustment based on real-time displacement detection. The system continuously monitors panel displacement and dynamically modifies audio signal levels to maintain sound generation while preventing image shake, transitioning from static to adaptive control
Solution Approach 2:
The patent employs a feedback mechanism where displacement detection units monitor panel movement and feed this information back to the gain adjustment unit. This closed-loop control enables the system to automatically adjust audio levels based on actual displacement conditions, resolving the contradiction between sound generation and image stability
2Stress or pressure
If the displacement amount is increased to improve sound pressure, then sound pressure is improved, but image shake becomes more prominent
Solution Approach 1:
The patent changes the operating parameters of the audio signal by dynamically adjusting gain levels based on detected displacement. When displacement approaches thresholds that cause visible image shake, the system automatically reduces signal levels, maintaining optimal sound pressure without exceeding vibration limits
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
Effectively suppresses image shake by dynamically adjusting the audio signal levels, ensuring sound pressure is maintained while preventing panel vibration, thus enhancing the viewing experience by reducing visual discomfort.
Implementation Method 1
a video display panel configured to display a video and generate sound by being vibrated by the vibration portion
Data Source
AI summary
Provided is a signal processing device including a displacement detection unit configured to detect a displacement amount of a video display panel that is vibrated to generate sound on the basis of an input audio signal, a threshold setting unit configured to calculate a displacement amount at which no image shake occurs and set a displacement amount calculated as a threshold, and a gain adjustment unit configured to adjust a level of the input audio signal on the basis of a result of comparison between a displacement amount detected by the displacement detection unit and the threshold.