Display Gap ESD Grounding Structure for FPC Protection
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Solution Overview
Problem
As displays become lighter and thinner, they face challenges in maintaining electrostatic discharge tolerance, with static electricity entering through gaps and damaging flexible printed circuits, leading to display failures.
Innovation Solution
An electrostatic protection structure is integrated into the electronic device, guiding static electricity to a grounded middle frame, preventing damage to the flexible printed circuit by providing a conductive path for discharge.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If the display becomes lighter and thinner, then the display weight and thickness are reduced, but the electrostatic discharge tolerance capability deteriorates
Solution Approach 1:
The patent introduces an electrostatic protection structure as an intermediary component between the display and the frame. This structure includes an electrostatic protection layer and a grounding structure that provides a dedicated path for static electricity to discharge safely, protecting the display without adding significant weight or thickness.
Solution Approach 2:
The patent extracts the electrostatic protection function from the display structure itself and separates it into a distinct grounding structure connected to the frame. This allows the display to remain lightweight and thin while the protection mechanism operates independently through the frame connection.
2Adaptability or versatility
If a non-full lamination design is used with FPC bending, then the display structure flexibility is improved, but the bending region becomes vulnerable to electrostatic damage
Solution Approach 1:
The patent implements preliminary protection by providing the electrostatic protection structure before electrostatic discharge can occur. The grounding structure is pre-positioned to intercept static electricity through the frame, preventing it from reaching the vulnerable FPC bending region.
3Reliability
If electrostatic protection measures are added to display components, then the electrostatic tolerance capability is improved, but the device complexity increases
Solution Approach 1:
The patent makes the frame serve multiple functions: it provides structural support, housing for components, and simultaneously acts as a grounding path for electrostatic discharge. The electrostatic protection layer is integrated into existing display components, allowing the same structures to fulfill both their original functions and electrostatic protection functions.
4Length of moving object
If the display is made thinner, then the overall device thickness is reduced, but the gap between display and frame becomes more critical for electrostatic protection
Solution Approach 1:
The electrostatic protection structure acts as an intermediary barrier that intercepts static electricity before it can enter through the gap between the thin display and the frame. The protection layer and grounding structure work together to provide this intermediate protection mechanism.
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 effectively grounds static electricity, enhancing the device's electrostatic tolerance and reliability while minimizing interference with antenna radiation signals, aligning with the trend of lightweight and thin designs.
Implementation Method 1
the electrostatic protection structure is configured to ground, at the middle frame, static electricity entering the electronic device from a gap between the display and the insulation top cover
Implementation Method 2
the electrostatic protection structure includes a guide part and at least one ground pin electrically connected to the guide part
Data Source
AI summary
An electronic device includes an insulation top cover, a middle frame, a display, and a flexible printed circuit electrically connected to an end of the display, where one side of the insulation top cover is located above an outer edge of the display, and the other side of the insulation top cover is connected to the middle frame. The electronic device further includes an electrostatic protection structure, where the electrostatic protection structure is configured to ground, at the middle frame, static electricity entering the electronic device from a gap between the display and the insulation top cover, to discharge, on the middle frame, the static electricity entering the electronic device.