Rotatable Display Audio Signal Processing for Stereo Consistency
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Solution Overview
Problem
Conventional display apparatuses experience inconsistencies in sound image localization and stereo effects when rotated from a horizontal to a vertical arrangement, due to the placement of speakers.
Innovation Solution
A rotatable display apparatus with a display panel, speakers positioned at the edges, a rotating device, a panel rotation detector, and an audio signal processor that adjusts audio signals based on the rotation state to maintain sound image localization and stereo.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If speakers are fixed at the lower surface in horizontal arrangement, then sound image localization matches the screen in horizontal mode, but sound image localization becomes inconsistent when rotated to vertical arrangement
Solution Approach 1:
The patent implements dynamic audio signal processing that automatically adjusts speaker output based on the detected rotation state. The audio signal processor receives rotation state information from the rotation detector and dynamically modifies audio signals to maintain consistent sound image localization across different display orientations, resolving the contradiction between fixed speaker placement and orientation adaptability
Solution Approach 2:
The system changes audio signal parameters (such as channel assignment, volume levels, or phase) based on the rotation state. When the display panel rotates from horizontal to vertical arrangement, the audio signal processor modifies the audio output parameters to compensate for the changed speaker orientation, thereby maintaining reliable sound image localization
2Reliability
If speakers are positioned at the lower surface, then stereo effect is achieved in horizontal arrangement, but stereo effect is lost in vertical arrangement
Solution Approach 1:
The audio signal processor dynamically adjusts the stereo audio signals based on the rotation state detected by the rotation detector. In horizontal arrangement, the processor outputs audio signals configured for lower surface speaker placement to achieve stereo effect. When rotated to vertical arrangement, the processor automatically modifies the stereo signal configuration to maintain the stereo effect despite the changed physical orientation of speakers
Solution Approach 2:
The system modifies audio signal parameters including channel assignment and signal distribution based on rotation state. The audio signal processor changes how audio signals are distributed to speakers depending on whether the display is in horizontal or vertical arrangement, ensuring consistent stereo effect across different orientations
3Reliability
If audio signals are transmitted to all speakers in all orientations, then audio coverage is maintained, but sound image localization and stereo effect deteriorate in vertical arrangement
Solution Approach 1:
The audio signal processor applies different audio signal transmission strategies to different speakers based on the rotation state. In vertical arrangement, the processor selectively transmits audio signals to specific speakers (e.g., leftmost and rightmost speakers) with different signal types (left audio signal, right audio signal, or mixed audio signal) to maintain sound image localization and stereo effect, rather than uniformly transmitting the same signal to all speakers
Solution Approach 2:
The system changes audio signal transmission parameters based on rotation state and speaker position. The audio signal processor determines which audio signals (left, right, or mixed) to transmit to which speakers based on the detected orientation, optimizing audio quality for each specific configuration
Data Source
AI summary
A rotatable display apparatus includes a display panel including a rectangular shape, a plurality of speakers provided at an edge of the display panel, a rotating device provided on a rear surface of the display panel and configured to rotate the display panel, a panel rotation detector configured to detect a rotation state of the display panel, an audio signal processor configured to transmit a left audio signal, a right audio signal, and a mixed audio signal to the plurality of speakers based on the rotation state of the display panel, and a mixer provided in the audio signal processor and configured to generate the mixed audio signal by mixing the left audio signal and the right audio signal at a predetermined ratio.