Display Panel Sound Generation for Multi-Channel Stereo Audio
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Solution Overview
Problem
Current display devices face challenges in providing high-quality stereo sound with multiple channels using a limited number of sound generators, as they often rely on separate speakers or complex speaker systems that increase size and complexity.
Innovation Solution
A display device with a sound driver that utilizes multiple sound generators, including a first sound generator for low-frequency and high-frequency sound, and a second sound generator for high-frequency sound, integrated into the display panel to produce 2.1 or 3.1 channels of stereo sound using a combination of digital signal processing, high-pass filtering, and amplification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate speakers or complex speaker systems are used to provide high-quality stereo sound with multiple channels, then audio performance is improved, but device size and structural complexity increase
Solution Approach 1:
The patent combines multiple sound generators (first sound generator for low-frequency and high-frequency sound, second sound generator for high-frequency sound) directly into the display panel structure, merging the audio functionality with the display structure. This integration eliminates the need for separate speaker systems while maintaining multi-channel stereo sound capability, thereby improving audio performance without increasing device structural complexity
Solution Approach 2:
The display panel serves dual functions: as the primary display component and as the vibration surface for sound generation. The sound generators are integrated into the display panel, allowing the same structural component to perform both display and audio functions. This multi-functionality approach enables high-quality stereo sound output without adding separate audio components that would increase device complexity
2Reliability
If multiple sound generators are integrated into the display panel to provide multi-channel stereo sound, then audio performance is improved, but the number of components increases
Solution Approach 1:
The audio system is segmented into specialized sound generators based on frequency ranges: the first sound generator handles low-frequency and high-frequency sound, while the second sound generator handles high-frequency sound. This segmentation allows each component to be optimized for specific frequency ranges, achieving high-quality multi-channel stereo sound with a limited number of strategically designed components rather than using numerous general-purpose speakers
Solution Approach 2:
Different regions of the display panel are assigned different sound generation functions with localized optimization. The first sound generator is positioned to produce low-frequency and high-frequency sound, while the second sound generator is positioned for high-frequency sound. Each sound generator is optimized for its specific frequency range and position, enabling high-quality stereo sound with minimal components by making each component locally optimal for its 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
The solution enables high-quality stereo sound with reduced hardware complexity, providing 2.1 or 3.1 channels of sound using only three sound generators, enhancing audio performance without increasing device size or complexity.
Implementation Method 1
a first sound generator that may be disposed on a second surface of the substrate, which may be opposite to the first surface of the substrate, the first sound generator may be configured to vibrate the display panel in accordance with a first sound signal to output first sound
Implementation Method 2
a second sound generator that may be disposed on the second surface of the substrate, and configured to vibrate the display panel in accordance with a second sound signal to output second sound, wherein the second sound may include sound in the high-frequency range
Data Source
AI summary
A display device includes a display panel including a substrate and a pixel array layer disposed on a first surface of the substrate; a first sound generator disposed on a second surface of the substrate, which is opposite to the first surface of the substrate, the first sound generator being configured to vibrate the display panel in accordance with a first sound signal to output first sound; and a second sound generator disposed on the second surface of the substrate, the second sound generator configured to vibrate the display panel in accordance with a second sound signal to output second sound, wherein the first sound includes both sound in a low-frequency range and sound in a high-frequency range, which is higher than the low-frequency range, and the second sound includes sound in the high-frequency range.