Display Panel Sound Generation with Coil and Piezoelectric Exciters
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Solution Overview
Problem
Existing display apparatuses face issues with sound quality and viewer immersion due to speakers being positioned at the rear or lower portions of the display panel, leading to degraded sound quality and limited design options.
Innovation Solution
Incorporation of at least one first sound generator in the display area and at least one second sound generator in the non-display area, utilizing coil-type and piezoelectric-type generators to vibrate the display panel and generate sound towards the front, enhancing sound quality and immersion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a speaker is provided in a display apparatus, then sound can be supplied, but the sound is projected toward the rear or lower portion of the display panel instead of toward the front, diminishing viewer immersion
Solution Approach 1:
Instead of placing the speaker at the rear or lower portion of the display panel (conventional approach), the patent inverts the arrangement by placing the speaker at the upper portion of the display panel. This inversion allows sound to be projected toward the front of the display panel, directly toward the viewer, thereby enhancing immersion while maintaining sound quality.
2Adaptability or versatility
If a speaker is provided in a set apparatus, then sound can be supplied, but the speaker occupies space and limits design and spatial disposition options
Solution Approach 1:
The display panel serves multiple functions: it acts as both the display surface and the sound projection surface. By integrating the speaker at the upper portion of the display panel and utilizing the display panel's front surface for sound projection, the system eliminates the need for separate speaker housing space, thereby enhancing design flexibility and spatial disposition options.
3Ease of manufacture
If sound is projected toward the rear or lower portion of the display panel, then speaker placement is simplified, but sound quality is degraded due to interference with reflected sound
Solution Approach 1:
The patent inverts the conventional sound projection direction by placing the speaker at the upper portion of the display panel and projecting sound toward the front instead of toward the rear or lower portion. This inversion eliminates interference with reflected sound from walls or floors, thereby improving sound quality while maintaining manufacturing simplicity.
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 enables high-pitched sound generation without increasing the bezel area, improving sound quality and viewer immersion by directing sound towards the viewer, while maintaining a slim design.
Implementation Method 1
at least one coil-type sound generator on a rear surface of the optical module
Implementation Method 2
at least one piezoelectric-type sound generator in the non-display area
Data Source
AI summary
An apparatus includes a vibration plate including an area and a bezel area surrounding the area, at least one vibration generator overlapping the area, and at least one exciter overlapping the bezel area. The at least one vibration generator does not overlap the bezel area. The at least one exciter includes a piezoelectric element. Each of the at least one vibration generator and the at least one exciter is configured to vibrate the vibration plate to generate sound.