Piezoelectric Display Panel Audio Layout for Front-Facing Sound
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional display devices with integrated speakers face challenges such as deteriorated sound quality due to sound propagation issues and spatial restrictions that limit design and arrangement.
Innovation Solution
The implementation of a piezoelectric film type actuator within the display device, positioned in a groove on the metal layer, allows for sound output in the front direction without increasing the device's overall thickness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a speaker is installed in the display device, then sound can be provided, but the propagation direction of sounds may not be toward the viewer causing sound quality deterioration
Solution Approach 1:
The patent replaces the conventional electromagnetic speaker with a piezoelectric actuator that directly vibrates the display panel to generate sound waves. This mechanical substitution allows the display panel itself to function as the sound source, enabling sound to propagate directly toward the viewer without requiring separate speaker components with complex acoustic directing mechanisms.
2Reliability
If a speaker is installed in the display device, then sound can be provided, but it occupies space and restricts design and space arrangement
Solution Approach 1:
The patent merges the sound output function with the display panel by using the piezoelectric actuator to vibrate the panel itself. This integration eliminates the need for separate speaker components, thereby reducing the overall device thickness and freeing up space for other design considerations while maintaining sound output capability.
Solution Approach 2:
The display panel serves dual functions: visual display and sound generation. By incorporating the piezoelectric actuator that vibrates the panel to produce sound, the panel becomes a multi-functional component that simultaneously provides images and audio output, reducing the need for additional dedicated sound components.
3Length of stationary object
If the piezoelectric film type actuator is disposed in the groove formed in the metal layer, then the overall thickness of the display device is reduced, but the drive unit needs to be embedded in a limited space
Solution Approach 1:
The patent embeds the drive unit within the groove structure of the metal layer, nesting the driving components within the existing structural space. This nesting approach allows the drive unit to be integrated into the limited space created by the groove without significantly increasing the overall device thickness, as the drive components utilize the vertical space within the groove rather than requiring additional lateral space.
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 solution enhances sound quality by directing sound towards the viewer, reduces device thickness, and improves heat dissipation and exterior aesthetics by embedding the drive unit and covering the rear surfaces.
Implementation Method 1
a piezoelectric film type actuator disposed in the groove of the metal layer and configured to vibrate the display panel
Implementation Method 2
The metal layer may support and encapsulate the display panel and emit the heat generated in the display device
Implementation Method 3
Heat conductivity of the heat dissipation sheet may be higher than heat conductivity of the metal layer
Data Source
AI summary
A display device can include a metal layer having a rear surface in which at least one groove is provided, the groove being thinner than the other portion of the metal layer, a display panel disposed on a front surface of the metal layer, a piezoelectric film type actuator disposed on rear surface of the metal layer, a heat dissipation sheet disposed on a front surface of the piezoelectric film type actuator, and an enclosure provided to cover a rear surface of the piezoelectric film type actuator. In addition, the heat dissipation sheet and the piezoelectric film type actuator may be disposed in the groove.