Display Module Grounding via Segmented PCB Tongue
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Solution Overview
Problem
Conventional liquid crystal display apparatuses suffer from poor grounding due to high grounding impedance of the printed circuit board, which affects the fixing and electrostatic discharge efficiency.
Innovation Solution
The implementation of a display module with a printed circuit board that includes multiple grounding regions, where the first grounding region is connected to the tongue's first surface and the second grounding region is connected to the tongue's second surface or the backplane's body, forming conductive paths for electrostatic discharge, thereby increasing the number of fixing points and discharge paths and reducing grounding impedance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the printed circuit board is fixed to the tongue with a single grounding connection, then the structure is simple, but the grounding impedance is high and the grounding effect is poor
Solution Approach 1:
The grounding structure is segmented into multiple independent grounding regions (first grounding region and second grounding region) distributed at different locations on the printed circuit board. Each grounding region connects to the tongue or backplane at separate points, dividing the single grounding path into multiple parallel paths, thereby reducing overall grounding impedance while maintaining structural simplicity
Solution Approach 2:
Multiple grounding regions are merged with the tongue and backplane to form a unified grounding system. The first grounding region connects to the first surface of the tongue, while the second grounding region connects to the second surface or body of the backplane, combining multiple grounding points into an integrated low-impedance grounding network
2Stability of the object's composition
If the printed circuit board has only one fixing point on the tongue, then the manufacturing process is simple, but the fixing stability is insufficient
Solution Approach 1:
The single fixing point is segmented into multiple fixing points by creating separate grounding regions at different locations on the printed circuit board. These multiple grounding regions serve as multiple attachment points to the tongue and backplane, distributing mechanical stress and improving fixing stability without significantly complicating the manufacturing process
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 configuration enhances the fixing stability and electrostatic discharge efficiency of the printed circuit board, ensuring that the grounding impedance meets requirements and preventing static electricity from interfering with the normal operation of the display module.
Implementation Method 1
the first grounding region of the printed circuit board and the first surface of the tongue form a conductive path for electrostatic discharge, and the second grounding region of the printed circuit board and the second surface of the tongue and/or the body of the backplane form another conductive path for electrostatic discharge
Implementation Method 2
the first grounding region is electrically connected to the first surface of the tongue... the second grounding region is electrically connected to at least one of the second surface of the tongue or the body of the backplane
Data Source
AI summary
A display module and a display apparatus are described. The display module includes display panel, backplane, and printed circuit board electrically connected to display panel. The backplane includes body and tongue protruding from body. The printed circuit board is fixed to tongue and includes first grounding region and second grounding region. The first grounding region is located on a side of the printed circuit board adjacent to the tongue. The tongue includes a first surface and a second surface opposite to the first surface. The first surface faces a side of the printed circuit board, and the first grounding region is electrically connected to the first surface of the tongue. The second grounding region is electrically connected to the second surface of the tongue and/or the body of the backplane. The printed circuit board is better fixed. A grounding impedance of the printed circuit board is reduced and meets requirements.