Display Vibration Plate Air-Gap Layout for Wider Sound Band
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Solution Overview
Problem
Display apparatuses and computing devices often suffer from degraded sound quality due to interference from reflected sounds and the placement of speakers, which can reduce viewer immersion, particularly in TVs and general computing devices where low-frequency and high-frequency sounds are not adequately produced.
Innovation Solution
A display apparatus and computing apparatus that utilize a vibration module integrated with a display panel, featuring a vibration plate with air gaps and a communication part to enhance sound characteristics, allowing air to flow and improve sound pressure and frequency response, particularly for low-pitched and high-pitched sound bands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If speakers are placed on the lower side or rear of the display apparatus, then the device structure is simplified and manufacturing is easier, but sound quality deteriorates due to reflected sound interference and poor sound directionality
Solution Approach 1:
The patent merges the speaker function with the display panel by integrating a vibration module directly into the display panel structure. The backlight unit serves dual purposes as both illumination source and vibration actuator, eliminating the need for separate speaker components and their associated mounting structures, thereby resolving the contradiction between manufacturing simplicity and sound quality
Solution Approach 2:
The backlight unit is designed to perform multiple functions: it provides illumination for the display and simultaneously acts as a vibration source for sound output. This multi-functionality eliminates the need for dedicated speaker components, simplifying the overall device structure while maintaining or improving sound quality through direct vibration transfer to the display panel
2Weight of moving object
If the display panel is made thinner and lighter, then the device becomes more portable and aesthetically pleasing, but sound output capability deteriorates due to reduced structural mass for vibration
Solution Approach 1:
The patent changes the operational parameters of the backlight unit by applying alternating current at audio frequencies to generate vibrations. By controlling the frequency and amplitude of the electrical signal, the system can produce a wide range of sound frequencies and volumes from a thin, lightweight display panel, overcoming the limitation of reduced structural mass
Solution Approach 2:
The system utilizes mechanical vibration of the display panel itself to produce sound. The backlight unit generates vibrations that directly transfer to the display panel, causing it to vibrate and produce sound waves. This approach allows thin, lightweight panels to effectively output sound by utilizing the panel's own structure as the vibrating element
3Temperature
If speakers are positioned away from the screen, then heat dissipation is improved, but viewer immersion deteriorates due to spatial separation between image and sound
Solution Approach 1:
The patent combines the sound output function with the display panel location, eliminating the spatial separation between image and sound sources. The vibration module is integrated directly into the display panel, ensuring that sound originates from the same location as the visual content, thereby enhancing viewer immersion while the display panel's inherent structure provides adequate heat dissipation
4Device complexity
If conventional speakers are used in computing devices, then the device structure is simplified, but sound quality deteriorates due to limited frequency range and poor low-frequency response
Solution Approach 1:
The system achieves a wide frequency response range by controlling the vibration parameters of the display panel through variable frequency electrical signals. The backlight unit can generate vibrations across a broad spectrum of frequencies, enabling the thin display panel to produce both low-frequency bass and high-frequency treble sounds, thereby improving frequency response quality without increasing device complexity
Solution Approach 2:
The backlight unit serves as a multi-functional component, acting as both the illumination source and the vibration actuator for sound production. This eliminates the need for separate speaker components and their complex mounting structures, simplifying the overall device structure while achieving superior frequency response through direct vibration transfer to the display panel
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 enhances sound quality by directly transferring sound waves to the viewer without distortion, improving immersion by ensuring harmony between image and sound, and allowing for a broader sound band that fills the screen.
Implementation Method 1
a vibration module on the vibration plate... output a sound using a vibration of a display module
Implementation Method 2
the vibration plate includes a communication part configured to allow air to flow between the first air gap and the second air gap
Data Source
AI summary
Provided are a display apparatus and a computing apparatus including the same. A display apparatus includes: a display module including a display panel configured to display an image, a vibration plate on the display module, a first air gap between the vibration plate and the rear surface of the display module, a vibration module on the vibration plate, and a system rear cover on the vibration plate, a second air gap between the system rear cover and the vibration plate, wherein the vibration plate includes a communication part configured to allow air to flow between the first air gap and the second air gap.