Conductive Foam Elastic Portion for Display Panel Static Dissipation
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Solution Overview
Problem
Liquid crystal display devices face challenges in integrating touch operation functionality while maintaining image display quality, particularly due to issues with static electricity and mechanical deformation affecting the connection between the liquid crystal panel and the frame.
Innovation Solution
A display module design incorporating a conductive part with an elastic portion, including conductive foam and a metal sheet or wire braid layer, which is connected to the liquid crystal panel and frame, ensuring stable contact and reducing static electricity influence, and a conductive buffer part like conductive foam tape for added stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a rigid connection structure is used between the liquid crystal panel and frame, then mechanical strength is improved, but thermal expansion/contraction damage occurs
Solution Approach 1:
The patent changes the physical state and mechanical properties of the connection material by using a conductive foam that transitions from a compressed elastic state to a stabilized conductive state. The foam's cell structure allows it to deform elastically under compression while maintaining electrical conductivity, thereby adapting to thermal expansion and contraction without compromising connection reliability or mechanical strength.
Solution Approach 2:
The patent employs a composite structure combining conductive foam with conductive adhesive or conductive paste. This composite material integrates the elastic deformation capability of foam with the strong bonding and electrical conductivity of adhesives/paste, creating a connection structure that simultaneously provides mechanical strength, thermal adaptability, and electrical conductivity.
2Reliability
If a conductive part with elastic portion is used, then connection stability under thermal stress is improved, but structural complexity increases
Solution Approach 1:
The conductive foam serves multiple functions simultaneously: it provides mechanical cushioning and stress distribution through its elastic properties, ensures electrical conductivity through its conductive material composition, and adapts to thermal dimensional changes through its compressible cell structure. This multi-functionality reduces the need for separate components, thereby simplifying the overall structure while improving connection stability.
Solution Approach 2:
The patent utilizes the flexible, compressible nature of foam material to create an adaptive connection structure. The foam's cellular structure allows it to deform and conform to dimensional changes in the liquid crystal panel during thermal expansion and contraction, maintaining stable electrical contact without requiring complex rigid adjustment mechanisms.
3Ease of manufacture
If conventional non-conductive sealing materials are used, then manufacturing simplicity is maintained, but static electricity damage occurs
Solution Approach 1:
The conductive foam acts as an intermediary material between the liquid crystal panel and the frame, replacing conventional non-conductive sealing materials. It maintains the sealing and cushioning functions while introducing electrical conductivity to dissipate static electricity. The foam's porous structure allows it to be impregnated with conductive adhesive or paste, creating a effective static electricity dissipation path without complicating the manufacturing process.
Solution Approach 2:
The patent changes the electrical conductivity parameter of the sealing/connection material from insulating to conductive by using conductive foam and impregnating it with conductive adhesive or paste. This parameter change enables the material to perform both its traditional sealing/cushioning function and the new function of static electricity dissipation, protecting the liquid crystal panel without requiring additional separate components.
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 enhances the display module's ability to maintain stable connections during thermal expansion or contraction, reduces static electricity effects, and improves display quality by ensuring consistent contact between the liquid crystal panel and the frame, while also potentially reducing module thickness and enhancing vibration absorption.
Implementation Method 1
at least part of the elastic portion is located between the liquid crystal panel and the frame and is in a compression state
Implementation Method 2
the conductive part is connected with the backplate or the circuit board, the conductive part includes an elastic portion connected with the liquid crystal panel
Data Source
AI summary
A display module includes: a backplate; a backlight module disposed on the backplate; a liquid crystal panel disposed on the backlight module; a frame configured to fix the liquid crystal panel; a circuit board disposed on the backplate; and a conductive part. The conductive part is connected with the backplate or the circuit board, the conductive part includes an elastic portion connected with the liquid crystal panel, and at least part of the elastic portion is located between the liquid crystal panel and the frame and is in a compression state. A display device is further disclosed.