Cover Member Discharge Path for DDI Static Protection
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Solution Overview
Problem
Conventional electronic devices face challenges in protecting display driver integrated circuits (DDIs) from static electricity, as cover members used to prevent damage often create paths for charge discharge adjacent to the DDI, leading to electromagnetic interference (EMI) and magnetic field effects that can cause image data errors.
Innovation Solution
The electronic device employs a cover member with conductive layers that discharge static electricity to a metal layer, forming a path for charge discharge along the metal layer, thereby keeping it spaced from the DDI, preventing EMI and magnetic field interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a cover member is placed adjacent to the DDI to block static electricity, then the DDI is protected from static electricity damage, but a discharge path is formed adjacent to the DDI causing EMI and magnetic field interference
Solution Approach 1:
The patent introduces a discharge path引导 structure (comprising conductive layers and ground connections) as an intermediary element between the cover member and ground. This mediator guides the static electricity discharge current away from the DDI through a controlled path, preventing both direct static damage and harmful EMI/magnetic field effects while maintaining the protective function of the cover member.
2Reliability
If the cover member is positioned close to the DDI for effective protection, then static electricity blocking is improved, but charge discharge paths are formed adjacent to the DDI surface
Solution Approach 1:
The patent applies local quality by creating different functional zones: the cover member is positioned close to the DDI for protection, while the discharge path is deliberately routed through specific regions (edges or corners) at a controlled distance from the DDI. This spatial differentiation allows simultaneous achievement of protection efficacy and EMI mitigation.
Solution Approach 2:
The patent resolves the spatial conflict by transitioning from a two-dimensional planar arrangement to a three-dimensional configuration. The discharge path is routed in the vertical dimension or along the lateral edges, utilizing the Z-axis or peripheral regions to maintain adequate spacing from the DDI while still providing effective static electricity diversion.
3Reliability
If a discharge path is formed along the cover member adjacent to the DDI, then static electricity can be discharged, but magnetic field effects occur affecting the logic block
Solution Approach 1:
The patent introduces a controlled discharge path structure (comprising conductive layers, ground connections, and routing features) as an intermediary that mediates between the static electricity discharge requirement and the logic block protection requirement. This mediator guides the discharge current through a predetermined path that maintains safe distance from the logic block, preventing magnetic field interference while preserving discharge functionality.
Solution Approach 2:
The patent segments the discharge path into distinct functional sections: a first portion near the cover member for charge reception, a middle portion routed through ground layers or peripheral regions for safe current flow, and a connection portion to ground. This segmentation allows the discharge path to fulfill its protective function while isolating the logic block from harmful magnetic field effects.
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 solution effectively protects the DDI from static electricity-induced EMI and magnetic field effects, ensuring accurate image data transmission by isolating the discharge path from the DDI.
Implementation Method 1
at least one conductive layer included in a cover member... discharge static electricity to a metal layer... path for discharging charge entered into the electronic device to be formed along the metal layer
Data Source
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AI summary
An electronic device is provided. The electronic device includes a display panel, a metal layer disposed on a surface of the display panel, a display driver integrated circuit (DDI) disposed on a surface of the metal layer, a bending part connecting the display panel to the DDI, and a cover member connected to the metal layer while covering the DDI. The cover member includes at least one conductive layer. The metal layer and the cover member form a space in which the DDI is disposed, and the bending part is connected to the DDI via a connection part in the space.