Electrostatic Protection Structure for Reduced Screen Black Edge
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Solution Overview
Problem
Existing electro-static discharge (ESD) protection strategies for electronic devices, such as mobile phones, either increase the screen's black edge width or risk radiated spurious emission (RSE) and secondary discharge due to insulation or grounding methods, respectively.
Innovation Solution
A voltage-clamping elastic component connected to a metal housing with a conductive layer and elastic conductor that conducts static electricity to the metal housing for discharge, preventing RSE and secondary discharge by clamping voltage at high static electricity levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If insulation method is used with solid adhesive, then electro-static discharge protection is achieved, but the width of the black edge of the screen increases affecting appearance
Solution Approach 1:
The patent changes the electrical property parameter of the adhesive from insulating to conductive. The conductive adhesive allows electro-static discharge protection through grounding while maintaining a narrow black edge width, thus resolving the contradiction between protection reliability and appearance quality.
2Reliability
If grounding method with conductive adhesive is used, then electro-static discharge protection is achieved, but the width of the black edge of the screen increases
Solution Approach 1:
The patent uses conductive adhesive with controlled electrical conductivity to achieve grounding protection. By optimizing the conductive particle concentration and distribution in the adhesive, the patent enables effective electro-static discharge while minimizing the required adhesive width, thus protecting both reliability and appearance.
3Reliability
If grounding method is used, then electro-static discharge protection is achieved, but risk of radiated spurious emission to antenna increases
Solution Approach 1:
The patent introduces an electro-static discharge protection structure as an intermediary component between the grounding system and the antenna. This structure provides a dedicated discharge path that isolates the antenna from direct grounding currents, thereby preventing radiated spurious emission while maintaining electro-static discharge protection capability.
4Reliability
If discharge in gap method is used, then electro-static discharge protection is achieved, but risk of secondary discharge increases
Solution Approach 1:
The patent introduces an electro-static discharge protection structure as an intermediary between the screen module and the grounding system. This structure includes conductive adhesive with optimized properties that prevent gap formation and eliminate the conditions for secondary discharge, while still providing effective electro-static discharge protection.
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
Prevents RSE and secondary discharge risks while maintaining antenna performance and reducing the screen's black edge width, enhancing manufacturing simplicity and material flexibility.
Implementation Method 1
the electro-static discharge protection structure discharges static electricity to the metal housing in a manner of discharge in a gap
Implementation Method 2
clamping voltage at high static electricity levels
Data Source
Figure 1~2
Figure 3~4
Figure 5
AI summary
This application illustrates an electro-static discharge protection structure and an electronic device. One end of a pressure-sensitive elastic component (3) is connected to a metal housing (1), the other end of the pressure-sensitive elastic component (3) extends in a direction away from the metal housing (1), and a screen module is disposed on a side of the pressure-sensitive elastic component (3). A border frame (2) includes a connection part (21) and a first side edge (22). The connection part (21) is disposed at one end, away from the metal housing (1), of the pressure-sensitive elastic component (3), and the connection part (21) includes a first surface (211) facing the screen module. The first side edge (22) is disposed on a side, facing the screen module, of the connection part (21). The first side edge (22) includes a second surface (221) facing the screen module. A conductive layer is disposed on a side, facing the pressure-sensitive elastic component (3), of the connection part (21). The one end of the pressure-sensitive elastic component (3) is connected to the conductive layer, and the other end of the pressure-sensitive elastic component (3) is connected to the metal housing (1). The conductive layer also continuously extends along the first surface (211) to the second surface (221). The electro-static discharge protection structure in this application prevents, without affecting antenna performance, risks of RSE and secondary discharge caused by poor grounding.