Display Panel Vibration Assembly for Forward Sound and Low-Frequency Gain
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Solution Overview
Problem
Display apparatuses face challenges in providing high-quality sound due to space constraints and interference from reflected sounds, leading to degraded sound quality and reduced immersion experience.
Innovation Solution
A vibration apparatus is integrated into the display panel's 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
1Adaptability or versatility
If a separate speaker is installed in a display apparatus, then sound can be provided, but the speaker occupies space and limits design and spatial disposition
Solution Approach 1:
The patent merges the speaker function with the display panel by integrating a vibration generator directly into the rear surface of the display panel. This eliminates the need for a separate speaker unit, thereby saving space and enhancing design flexibility while maintaining sound output capability.
Solution Approach 2:
The display panel is given multi-functionality by enabling it to serve both as a visual display and as a sound generation device. The vibration generator integrated into the display panel allows the same component to perform dual functions: displaying images and producing sound, thus reducing the overall component count and space requirement.
2Reliability
If sound is output from a speaker in a display apparatus, then sound can be heard, but sound quality is degraded due to interference from reflected sounds
Solution Approach 1:
Instead of outputting sound forward from a traditional speaker, the patent inverts the approach by using the display panel itself as the sound radiation surface. The vibration generator vibrates the display panel to generate sound waves that propagate forward, bypassing the issue of reflected sounds from walls and ground that plague traditional speaker setups.
Solution Approach 2:
The patent replaces the traditional acoustic speaker system with a mechanical vibration system. The vibration generator directly mechanically vibrates the display panel to produce sound, eliminating the need for a separate acoustic chamber and speaker cone, thereby reducing sound interference from reflections.
3Power
If vibration generators are stacked to increase displacement, then sound pressure level is improved, but device complexity increases
Solution Approach 1:
The patent employs a nested structure where multiple vibration generators are stacked one on top of another within the same footprint area. This vertical stacking arrangement increases the overall displacement capability and sound pressure level without significantly increasing the horizontal space occupied, thus managing complexity through compact integration.
Solution Approach 2:
Instead of increasing the size of a single vibration generator in the horizontal plane, the patent transitions to the vertical dimension by stacking multiple vibration generators. This dimensional change allows for increased displacement and sound pressure level while maintaining a compact overall device footprint, effectively managing structural complexity.
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 by maximizing amplitude displacement, improving middle-pitched and low-pitched sound bands, and achieving better sound pressure levels, thereby improving the overall sound experience.
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
an adhesive member between the plurality of vibration generators
Data Source
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.