Display Panel Vibration Audio Structure for Forward Sound Output
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Solution Overview
Problem
Display apparatuses face challenges in providing high-quality sound due to space constraints and interference from sound reflections, leading to degraded sound quality and reduced immersion experience.
Innovation Solution
A vibration apparatus is integrated into the display panel at its rear surface, featuring stacked vibration generators with an adhesive member and a pad member to enhance sound characteristics and pressure levels, allowing for efficient sound generation and output in the forward direction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a separate speaker is installed in the display apparatus, then sound can be provided, but the speaker occupies space and limits design freedom
Solution Approach 1:
The patent merges the speaker function with the display panel by integrating a vibration apparatus directly into the rear surface of the display panel. The display panel itself serves as the vibration element, eliminating the need for a separate speaker and thereby freeing up internal space while maintaining sound output capability.
Solution Approach 2:
The display panel is given multiple functions: it serves both as the visual display surface and as the vibration element for sound generation. This multi-functionality allows the same component to fulfill both display and audio roles, reducing the overall component count and space requirements.
2Volume of moving object
If sound is output from the rear or downward direction, then space is saved, but sound quality is degraded due to interference from reflections
Solution Approach 1:
Instead of outputting sound from the rear or downward direction as in conventional designs, the patent inverts the sound output direction to the front, same as the display surface. The vibration apparatus is positioned at the rear surface but vibrates the display panel to generate sound waves that propagate forward, avoiding reflection interference while maintaining space efficiency.
3Volume of moving object
If vibration apparatus is integrated into display panel, then space is saved and design freedom is improved, but sound pressure level and quality need enhancement
Solution Approach 1:
The patent employs multiple vibration generators stacked in the thickness direction (vertical dimension) of the display panel. This vertical stacking arrangement allows multiple sound sources to be integrated within the same footprint, enhancing sound pressure level without increasing the horizontal area occupied, thus maintaining space efficiency while improving acoustic performance.
Solution Approach 2:
The patent uses a composite structure consisting of multiple vibration generators, adhesive members, and pad members stacked together. This composite arrangement combines multiple functional layers to achieve enhanced sound pressure and quality while maintaining a compact integrated form factor within the display panel thickness.
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 solution effectively enhances sound quality and pressure levels, particularly in the middle-pitched and low-pitched sound bands, improving the overall sound experience by maximizing amplitude displacement and vibration efficiency.
Implementation Method 1
a vibration apparatus disposed at a rear surface of the display panel and configured to vibrate the display panel
Implementation Method 2
a plurality of vibration generators stacked to be displaced in the same direction
Data Source
AI summary
A display apparatus includes a display panel configured to display an image, a vibration apparatus at a rear surface of the display panel and configured to vibrate the display panel, a supporting member at a rear surface of the vibration apparatus, and a pad member between the vibration apparatus and the supporting member. A size of the pad member may be smaller than a size of the vibration apparatus, and the pad member may be connected to the rear surface of the vibration apparatus.