Display Panel Acoustic Layout With Vibration Damping
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Solution Overview
Problem
Existing display devices face challenges in improving sound quality by effectively outputting sounds in different frequency bands without causing visible vibrations of the display panel that can be visually recognized by users.
Innovation Solution
The display device incorporates a vibration damping member with high rigidity between the display panel and the sound generators to reduce vibration displacement, along with multiple sound generators positioned to output sounds in various frequency bands, and includes blocking members to prevent vibration propagation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If sound generators are disposed directly on the display panel to output sounds in different frequency bands, then sound quality is improved, but vibration displacement of the display panel increases causing visible vibrations
Solution Approach 1:
A vibration damping member is introduced as an intermediary between the first sound generator and the display panel. This damping member reduces the vibration displacement transmitted to the display panel while still allowing the sound generator to output low frequency sounds effectively. The damping member acts as a buffer that filters out harmful vibrations while preserving the useful sound output function.
Solution Approach 2:
Different regions of the display panel are assigned different functions: one region serves as the vibration damping area where the first sound generator is disposed with the damping member to reduce visible vibrations, while another region serves as the sound output area where the second sound generator is disposed directly on the panel to output high frequency sounds. This local differentiation allows simultaneous achievement of reduced visible vibrations and improved sound quality across different frequency bands.
2Object-affected harmful factors
If a vibration damping member is disposed between the display panel and the first sound generator to reduce vibration displacement, then visible vibrations are minimized, but the structural complexity increases
Solution Approach 1:
The vibration damping member is implemented as a thin film or flexible damping layer that can be disposed between the display panel and the first sound generator. This thin film approach reduces the added structural complexity and thickness compared to rigid damping structures, while still effectively reducing vibration displacement and minimizing visible vibrations.
3Adaptability or versatility
If multiple sound generators are disposed on the display panel to output sounds in various frequency bands, then sound quality is enhanced, but the device complexity increases
Solution Approach 1:
The sound output function is segmented into two distinct parts: a first sound generator for low frequency sounds with vibration damping, and a second sound generator for high frequency sounds disposed directly on the panel. This segmentation allows each sound generator to be optimized for its specific frequency range, enhancing overall sound quality while managing device complexity through functional division rather than attempting to make a single generator handle all frequencies.
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
This configuration enhances sound quality by minimizing visible vibrations of the display panel, allowing for clear sound output in both low and high frequency bands without compromising the visual experience.
Implementation Method 1
a first vibration damping member disposed between the display panel and the first sound generator, where the first vibration damping member reduces a vibration displacement of the display panel
Implementation Method 2
a first sound generator disposed on a surface of the display panel, where the first sound generator vibrates the display panel to output a first sound
Implementation Method 3
the second sound generator outputs a second sound by vibrating the display panel, and the second sound is in a higher frequency band than the first sound
Data Source
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AI summary
A display device includes: a display panel; a first sound generator disposed on one surface of the display panel, where the first sound generator vibrates the display panel to output a first sound; and a first vibration damping member disposed between the display panel and the first sound generator, where the first vibration damping member may comprise two metal layers and reduces a vibration displacement of the display panel. The display device may further comprise heat pins for directed heat discharge, further sound generators for the same or a different, e.g. higher, frequency range, i.e. voice-coil transducers for a lower frequency range and piezoelectric transducers for a higher frequency range, blocking members to block vibration propagation on the display panel between the plurality of sound generators, or a control circuit folded onto the display panel with a flexible PCB.