Flexible Display Driving Chip EMI Shielding via Heat Dissipation
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Solution Overview
Problem
High refresh frequency requirements in gaming mobile phones lead to increased susceptibility of integrated circuits (ICs) to electromagnetic interference, causing screen blurring and instability due to their fragility and susceptibility to electromagnetic waves.
Innovation Solution
A flexible display device design incorporating a support heat dissipation structure with an electromagnetic shielding structure, including a wave-absorbing material layer and insulating Mylar sheet, positioned to cover the driving chip and prevent electromagnetic interference, while maintaining a thin profile.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a traditional electromagnetic shielding structure is added to protect the driving chip, then the shielding effect is improved, but the device thickness increases
Solution Approach 1:
The electromagnetic shielding layer is nested within the existing heat dissipation structure, placing the shielding function inside the thermal management architecture rather than adding a separate external shielding component. This allows the shielding function to be integrated without increasing overall device thickness.
Solution Approach 2:
The heat dissipation structure is designed to serve dual purposes: thermal management and electromagnetic shielding. By making the shielding layer part of the heat dissipation assembly, a single structure performs both heat dissipation and EMI protection functions, eliminating the need for additional dedicated shielding components that would increase thickness.
2Device complexity
If the driving chip is exposed to electromagnetic waves, then the device structure remains simple, but screen blurring and instability occur
Solution Approach 1:
The electromagnetic shielding function is extracted from the traditional separate shielding structure and integrated into the heat dissipation layer. This extraction and reintegration approach allows the shielding capability to be incorporated without adding complex external shielding assemblies, maintaining structural simplicity while improving reliability.
Solution Approach 2:
The electromagnetic shielding layer is merged with the heat dissipation structure, combining two previously separate functions (thermal management and EMI protection) into a single integrated assembly. This merging reduces overall structural complexity while simultaneously protecting the driving chip from electromagnetic interference.
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 shields the driving chip from electromagnetic interference, enhancing its performance and stability without increasing the device's thickness, thus ensuring smoother screen performance and preventing issues like screen blurring.
Implementation Method 1
a wave-absorbing material layer, disposed on a side, facing away from the display panel, of the double-sided adhesive tape
Implementation Method 2
a support heat dissipation structure, disposed on a side of a non-display surface of the display area
Data Source
AI summary
Disclosed is a display device, comprising: a display panel (10), wherein the display panel (10) comprises a display area (AA), a bending area (BB) and a bonding area (CC), with the bending area (BB) being arranged between the display area (AA) and the bonding area (CC); a support heat dissipation structure (20), with the support heat dissipation structure (20) being disposed on a non-display surface (10b) of the display area (AA); a driving chip (30), with the driving chip (30) being fixed to a bonding surface (10c) of the bonding area (CC); and an electromagnetic shielding structure (40), with the electromagnetic shielding structure (40) being fixed onto a side of the support heat dissipation structure (20) away from the display panel (10).