Display Panel Vibration for Front-Facing Sound Output
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Solution Overview
Problem
Conventional display devices face challenges in producing high-quality sound due to limited space, resulting in sound being output towards the lower surface or side, rather than the front, which degrades the audio experience.
Innovation Solution
A display device that incorporates a sound generation device, including a bobbin, voice coil, magnet, and plate, to vibrate the display panel, allowing sound to be output towards the front surface, thereby enhancing sound quality and potentially omitting the need for a separate speaker.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If a separate speaker is disposed on the lower surface or side of the display panel, then the display device can output sound, but the sound quality is degraded and sound cannot be output towards the front surface
Solution Approach 1:
The patent merges the speaker function with the display panel by using the display panel itself as the vibration membrane. The sound generation device is integrated behind the display panel, eliminating the need for a separate speaker component and enabling front-facing sound output while maintaining thin device profile.
Solution Approach 2:
The display panel serves dual functions: displaying visual information and generating sound. By making the display panel capable of vibration in response to audio signals, it becomes a multi-functional component that combines display and audio output capabilities.
2Ease of operation
If the display panel is used as a vibration membrane for sound output, then sound can be output towards the front surface, but the display panel may be damaged due to vibration
Solution Approach 1:
The patent implements a protective structure including a frame and damping material positioned between the sound generation device and the display panel. This cushioning structure is designed in advance to absorb vibration energy and prevent damage to the display panel while allowing effective sound transmission.
Solution Approach 2:
The frame and damping material act as intermediary elements between the vibration source and the display panel. These intermediaries transmit the necessary vibrations for sound generation while filtering out damaging high-amplitude vibrations, thus protecting the display panel.
3Weight of moving object
If a sound generation device is integrated behind the display panel, then sound quality is improved with front-facing output, but the device complexity increases
Solution Approach 1:
The sound generation device is merged with the display panel assembly, sharing the same space and structural components. The display panel serves as both the visual display and the sound output membrane, reducing the need for separate speaker housing and mounting structures.
Solution Approach 2:
The display panel performs multiple functions including display, protection, and sound generation. This multi-functionality reduces the overall component count and structural complexity compared to having separate dedicated components for each function.
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 improves sound quality by directing sound output towards the user while potentially eliminating the need for a separate speaker, enhancing the overall audio experience in display devices.
Implementation Method 1
a voice coil surrounding a side surface of the bobbin, a magnet disposed on the bobbin and spaced apart from the bobbin
Data Source
AI summary
A display device including a display panel including a substrate and a pixel array layer disposed on a first surface of the substrate, a sound generation device disposed on a second surface of the substrate opposite to the first surface of the substrate, and a circuit board disposed on the second surface of the substrate, in which the circuit board includes a first hole overlapping the sound generation device.