LCD Panel Acoustic Structure Using Backlight Vibration Transfer
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Solution Overview
Problem
Liquid crystal display (LCD) panels face challenges in emitting sound due to the presence of a backlight source that interferes with sound-emitting exciters, as the backlight source cannot be blocked and vibration cannot be effectively transmitted, leading to poor audio-visual synchronization.
Innovation Solution
A display apparatus with a liquid crystal display panel and a backlight module, where a first sealed air cavity is formed in the panel, and the backlight module forms a second sealed air cavity. A sound-emitting board is fixed to the backlight module, and a sound-emitting exciter is attached to the sound-emitting board, exciting it to vibrate the backlight module, which in turn vibrates the liquid crystal display panel to emit sound.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a sound-emitting exciter is mounted on the LCD panel to generate sound, then audio-visual synchronization can be achieved, but the backlight source cannot be blocked and vibration cannot be effectively transmitted
Solution Approach 1:
The patent introduces a sound-emitting board as an intermediary component between the sound-emitting exciter and the LCD panel. The exciter vibrates the sound-emitting board, which in turn vibrates the LCD panel to produce sound. This intermediary structure enables effective vibration transmission while keeping the exciter mounted on the panel surface, achieving audio-visual synchronization without compromising vibration effectiveness.
2Shape
If the display panel is made ultra-thin for aesthetic appearance, then the television achieves a modern look, but the speaker must be positioned below or back causing sound image position difference
Solution Approach 1:
The patent merges the display function and sound emission function into a single integrated structure. The sound-emitting exciter and sound-emitting board are mounted directly on the display panel surface, combining what were previously separate components (display panel and speaker) into one unified ultra-thin structure. This enables sound to be emitted from the panel itself, aligning the sound image position with the visual content while maintaining the ultra-thin aesthetic appearance.
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 sound emission from the LCD panel, providing audio-visual synchronization by transmitting vibration through sealed air cavities and sound-emitting boards, overcoming the industrial bottleneck of sound emission in LCD panels.
Implementation Method 1
the sound-emitting exciter is configured to excite, through the vibration output terminal, the sound-emitting board to vibrate to drive the backlight module to vibrate
Implementation Method 2
a first sealed air cavity is formed in the liquid crystal display panel, and the backlight module is located at a side of the liquid crystal display panel and forms a second sealed air cavity with the liquid crystal display panel
Data Source
Figure 1~2
Figure 3
Figure 4~5
AI summary
A display device (200), comprising: a liquid crystal display panel (1) and a backlight module (2), a first sealed air cavity (3) being formed inside the liquid crystal display panel (1), and the backlight module (2) being located on one side of the liquid crystal display panel (1) and forming a second sealed air cavity (4) together with the liquid crystal display panel (1); and a sound producing board (5) and a sound producing exciter (6), the sound producing board (5) being fixed to the surface of the backlight module (2) distant from the liquid crystal display panel (1), a vibration output terminal (7) of the sound producing exciter (6) being fixed to the surface of the sound producing board (5) distant from the backlight module (2), and the sound producing exciter (6) being used for exciting, by means of the vibration output terminal (7), the sound producing board (5) to vibrate so as to drive the backlight module (2) to vibrate.