Display Device Circuit Ground Wire Segmentation for Signal Coupling
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Solution Overview
Problem
Existing liquid crystal display devices suffer from signal coupling between functional circuit modules due to shared ground wires, leading to abnormal phenomena such as power amplifier noise, screen noise points, and flickers.
Innovation Solution
The implementation of a display device system circuit with multiple ground wires corresponding to each functional circuit module, where operating current output ends are connected to a negative electrode of the power supply via separate ground wires, preventing interference between modules.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a shared ground wire is used to connect multiple functional circuit modules to the negative electrode of the power supply, then the device complexity is reduced and the ease of manufacture is improved, but signal coupling occurs between modules causing power amplifier noise, screen noise points, and flickers
Solution Approach 1:
The shared ground wire is segmented into multiple independent ground wires, with each ground wire dedicated to connecting a specific functional circuit module to the negative electrode. This segmentation isolates the current paths of different modules, preventing signal coupling while maintaining a relatively simple overall structure.
Solution Approach 2:
Each functional circuit module is provided with a dedicated ground wire with specific local characteristics optimized for that module's current requirements. This ensures that each module has an appropriate ground connection without affecting other modules, resolving the signal coupling issue while maintaining manufacturing efficiency.
2Ease of operation
If multiple functional circuit modules share a common ground wire, then the ease of operation is improved and the ease of manufacture is improved, but the reliability of signal transmission deteriorates due to potential variations affecting multiple modules
Solution Approach 1:
The common ground connection is segmented into multiple separate ground wires, one for each functional circuit module. This ensures that potential variations in one module's current do not affect the ground potential of other modules, thereby improving signal transmission reliability while maintaining operational simplicity through standardized connection methods.
Solution Approach 2:
Each ground wire acts as an independent intermediary between its associated functional circuit module and the negative electrode of the power supply. This intermediary connection isolates the electrical characteristics of each module, preventing mutual interference and ensuring stable signal transmission across all modules.
3Loss of substance
If a single ground wire is used for all functional circuit modules, then the loss of substance is reduced and the ease of manufacture is improved, but object-generated harmful factors increase due to operating current affecting the potential of other modules
Solution Approach 1:
The single ground wire is divided into multiple separate ground wires, each dedicated to a specific functional circuit module. This segmentation eliminates the harmful effect of operating current from one module affecting the potential of other modules, as each module now has its own independent current return path to the negative electrode.
Solution Approach 2:
Each ground wire is designed with local characteristics suited to its associated module's current requirements. This localized approach ensures that operating current variations in one module do not create potential fluctuations that would interfere with other modules, thereby eliminating current interference while using an appropriate amount of wire material.
Data Source
AI summary
A display device system circuit and a display device are provided. The display device system circuit includes a power supply, a plurality of functional circuit modules and a plurality of ground wires corresponding to the plurality of functional circuit modules, respectively. Operating current input ends of the plurality of functional circuit modules are electrically connected to a positive electrode of the power supply, respectively. An operating current output end of each of the functional circuit modules is electrically connected to a negative electrode of the power supply via a corresponding ground wire. The functional circuit modules will not be interfered with each other, avoiding causing abnormal displaying by signal coupling between the functional circuit modules.