Conductive Cloth Shielding for Display Device EMI
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Solution Overview
Problem
Existing display devices, particularly in portable equipment, face challenges in preventing undesired electromagnetic radiation from affecting human bodies and other electronic equipment due to the integration of display panels and driving circuits, which is exacerbated by the need for compactness and lightness, and the limitations of conventional filter glass solutions.
Innovation Solution
A display device configuration featuring a metallic front and back housing with a conductive cloth covering the panel module's edges and surfaces, ensuring electrical connection between the housings and the cloth, effectively shielding electromagnetic radiation by maintaining the same electric potential and using elastic members for secure placement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If filter glass is used to form conductive loop for shielding electromagnetic radiation, then electromagnetic radiation prevention is improved, but device weight increases
Solution Approach 1:
The patent changes the material parameter from traditional filter glass to conductive cloth, which has different physical properties (flexibility, weight, conductivity) that better suit portable devices while maintaining electromagnetic shielding functionality
Solution Approach 2:
The patent uses composite material structure combining conductive cloth with elastic members and housing components to create a multi-functional shielding system that provides both electromagnetic radiation prevention and mechanical flexibility without the weight penalty of traditional filter glass
2Object-affected harmful factors
If conventional shielding methods are applied to portable equipment, then electromagnetic radiation prevention is improved, but device compactness deteriorates
Solution Approach 1:
The patent employs conductive cloth as a flexible thin film material that can be conformally attached to the panel module edges and housed within the device housing, providing effective electromagnetic shielding while maintaining the compact and flexible design requirements of portable equipment
Solution Approach 2:
The patent transitions from planar filter glass shielding to three-dimensional conductive cloth coverage that wraps around the panel module edges and integrates with the housing structure, achieving comprehensive shielding in a space-efficient manner
3Adaptability or versatility
If circuit elements are disposed on the periphery of panel module to enhance functionality, then device versatility is improved, but electromagnetic radiation interference increases
Solution Approach 1:
The patent segments the electromagnetic shielding function from the functional circuit elements by introducing conductive cloth as a dedicated shielding layer that spatially separates and protects the peripheral circuit elements from electromagnetic radiation generated by the panel module
Solution Approach 2:
The conductive cloth acts as an intermediary shielding layer between the panel module and the peripheral circuit elements, mediating the electromagnetic interaction and preventing direct interference while allowing the circuit elements to maintain their functional positioning
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 effectively prevents electromagnetic radiation leakage, ensuring stable operation of electronic equipment by shielding the radiation and maintaining the integrity of adjacent functional elements, particularly in portable devices like notebook computers.
Implementation Method 1
the conductive cloth continuously covering a circumferential edge portion of the panel module on the display surface side, a side surface portion of the panel module and a circumferential edge portion of the panel module on the back surface side and being connected electrically to the front housing and the back housing
Data Source
AI summary
The display device includes: a panel module 4 that includes a display panel 16 and a driving circuit for driving the display panel 16; a metallic front housing 11 that partially covers the panel module 4 from a display surface side of the display panel 16; and a metallic back housing 12 that covers the panel module 4 from a back surface side of the display panel 16. A conductive cloth 24 is disposed between the panel module 4, and the front housing 11 and the back housing 12, the conductive cloth 24 continuously covering a circumferential edge portion of the panel module 4 on the display surface side, a side surface portion of the panel module 4 and a circumferential edge portion of the panel module 4 on the back surface side and being connected electrically to the front housing 11 and the back housing 12.