Display Microphone Integrating OLED Panel and Electrodes
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Solution Overview
Problem
Conventional display devices lack integrated microphone functionality, necessitating additional modules that increase size, cost, and design constraints, especially in compact devices like smartphones and smartwatches.
Innovation Solution
Implementing a microphone using a display panel, such as an OLED or LCD, by leveraging its vibration characteristics to change capacitance or generate electromagnetic induction, allowing the display panel to function as both a display and a microphone by coupling electrodes to form capacitors or electromagnets, and utilizing power supplies to output audio signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a separate microphone module is added to the display device, then the microphone functionality is achieved, but the device size increases and manufacturing cost increases
Solution Approach 1:
The patent combines the display panel and microphone into a single integrated structure. The display panel's front surface serves as the microphone's sound collection surface, and the rear surface serves as the diaphragm. This merging eliminates the need for a separate microphone module, thereby reducing device size while maintaining microphone functionality.
Solution Approach 2:
The display panel is designed to serve dual functions: displaying visual information and capturing sound. By making the display panel itself functional as a microphone diaphragm, the invention achieves multi-functionality, allowing the same component to perform both display and audio input tasks.
2Adaptability or versatility
If a separate microphone module is added to the display device, then the microphone functionality is achieved, but the manufacturing cost increases
Solution Approach 1:
The patent combines the display panel and microphone into a single integrated structure. The display panel's front surface serves as the microphone's sound collection surface, and the rear surface serves as the diaphragm. This merging eliminates the need for a separate microphone module, thereby reducing device size while maintaining microphone functionality.
Solution Approach 2:
The display panel is designed to serve dual functions: displaying visual information and capturing sound. By making the display panel itself functional as a microphone diaphragm, the invention achieves multi-functionality, allowing the same component to perform both display and audio input tasks.
3Device complexity
If the display panel is used as a microphone, then additional modules are eliminated, but the sensitivity and noise reduction requirements increase
Solution Approach 1:
The patent incorporates an amplification circuit that provides feedback to enhance the weak electrical signals generated by the display panel's vibration. This feedback mechanism allows the system to compensate for the lower sensitivity of the integrated microphone, maintaining audio signal quality while keeping the device structure simple.
Solution Approach 2:
The patent introduces an amplification circuit as an intermediary component between the display panel and the audio output. This intermediary element boosts the weak signals from the panel and reduces noise, enabling the integrated microphone to achieve sufficient sensitivity without adding complex external modules.
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
Enables the integration of microphone functionality within display devices without additional modules, reducing size and manufacturing costs, while maintaining high sensitivity and noise reduction through amplification, applicable to various devices including TVs, monitors, smartphones, and smartwatches.
Implementation Method 1
a display microphone device comprises a display panel having a front surface from which light is emitted and a rear surface opposite the front surface, a front electrode coupled to the rear surface of the display panel, a rear electrode facing and spaced apart from the front electrode, and a power supply connected to the front electrode and the rear electrode. The display microphone device outputs an audio signal based on a change in a voltage between the front electrode and the rear electrode.
Implementation Method 2
an electromagnet including a magnetic core and a coil wound around the core a plurality of times. The electromagnet is coupled to the rear surface of the display panel and outputs an audio signal based on a change in a current generated from the coil.
Data Source
AI summary
A display microphone device includes a display panel having a front surface from which light is emitted and a rear surface opposite the front surface. A front electrode is coupled to the rear surface of the display panel, a rear electrode faces and is spaced apart from the front electrode. A power supply is connected to the front electrode and the rear electrode. The display microphone device outputs an audio signal based on a change in a voltage between the front electrode and the rear electrode.