Display Panel Vibration Speaker Layout for Thin Stereo Sound
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Solution Overview
Problem
Display apparatuses face challenges with sound quality degradation due to speaker interference and limited spatial design, which affects immersion experience and sound output.
Innovation Solution
A vibration apparatus is integrated at the rear surface of the display panel, comprising a plurality of vibration generators stacked in the same direction with an adhesive member and a pad member, enhancing sound characteristics and pressure levels by vibrating the display panel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a separate speaker is installed in a display apparatus, then sound output function is provided, but the speaker occupies space and limits design flexibility
Solution Approach 1:
The patent combines the speaker function with the display panel by integrating a vibration generator directly onto the rear surface of the display panel. This merging eliminates the need for a separate speaker unit, thereby providing sound output functionality while occupying minimal additional space and maintaining design flexibility.
Solution Approach 2:
The display panel serves multiple functions: it acts as both the visual display surface and the sound output surface through the integrated vibration generator. This multi-functionality allows the same component (display panel) to fulfill both imaging and audio output roles, reducing overall device volume.
2Power
If a speaker is installed in a display apparatus, then sound output is achieved, but sound quality is degraded due to interference between reflected sounds
Solution Approach 1:
The patent extracts the sound output directionality issue by positioning the vibration generator to emit sound primarily in the forward direction (toward the viewer) rather than in all directions. This extraction of the problematic omnidirectional sound emission resolves the interference issue caused by reflections from walls and ground.
Solution Approach 2:
The vibration generator acts as an intermediary between the electrical signal and the display panel, converting electrical signals directly into mechanical vibrations of the panel itself. This direct coupling eliminates the need for traditional speaker enclosures and acoustic pathways that cause sound reflections and interference.
3Power
If the display panel is vibrated to generate sound, then sound output is achieved, but the structure requires optimization for enhanced sound characteristics
Solution Approach 1:
The patent applies local quality optimization by positioning the vibration generator at a specific location on the rear surface of the display panel and designing its structure to match the acoustic requirements. The vibration generator includes specific components (magnet, coil, diaphragm) arranged to produce optimal vibration patterns for enhanced sound characteristics in specific frequency ranges.
Solution Approach 2:
The patent employs parameter changes by adjusting the vibration frequency, amplitude, and waveform of the vibration generator to optimize sound output characteristics. By controlling these parameters, the system achieves enhanced sound quality and pressure levels, particularly in middle-pitched and low-pitched sound bands as mentioned in the effects.
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
The vibration apparatus improves sound quality and pressure levels, particularly in the middle-pitched and low-pitched sound bands, while maintaining a thin profile and enabling stereo sound output.
Implementation Method 1
a vibration generator may include a magnet, a coil, and a diaphragm
Data Source
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Figure 5~6B
AI summary
An apparatus comprises a display panel configured to display an image, a vibration apparatus disposed at a rear surface of the display panel and configured to vibrate the display panel, a supporting member at the rear surface of the display panel, and a pad member between the vibration apparatus and the supporting member.