Conductive Elastic Sheet Slit Design for LCD Frame Connection
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Solution Overview
Problem
The existing liquid crystal display devices face challenges in securing a stable electrical connection between conductive rubber and the image display screen due to the elastic force causing the conductive rubber to peel off from the screen.
Innovation Solution
A liquid crystal display device design featuring a conductive elastic sheet with a slit between its outer and inner portions, where the inner portion is laminated flat to the image display screen and the outer portion is sandwiched between the resin and metal frames, ensuring the inner portion remains securely attached despite elastic forces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the conductive rubber is bent obliquely upward from the image display screen to extend over the resin frame, then the conductive rubber can be electrically connected to the metal frame, but the elastic force of the conductive rubber causes it to peel off from the image display screen
Solution Approach 1:
The conductive elastic sheet is divided into three distinct portions: an inner portion that remains flat on the image display screen, a connecting portion that may be bent, and an outer portion that contacts the metal frame. The slit between the inner and outer portions isolates the bending stress, preventing it from reaching the adhesion interface between the inner portion and the screen.
Solution Approach 2:
The connecting portion acts as an intermediary element that transmits the bending motion from the outer portion to the inner portion while the slit prevents stress concentration. This intermediary structure allows the outer portion to contact the metal frame while the inner portion remains stably adhered to the screen.
2Adaptability or versatility
If the conductive rubber is made elastic to allow bending and contact with the metal frame, then electrical connection is achieved, but the elastic force creates peeling stress on the image display screen
Solution Approach 1:
The conductive elastic sheet is segmented into portions with different functional requirements. The inner portion maintains strong adhesion through flat lamination, while the outer portion provides bending adaptability through the slit structure that allows controlled deformation without compromising the adhesion of the inner portion.
Solution Approach 2:
Different portions of the conductive elastic sheet have different structural qualities: the inner portion is flat for maximum adhesion, the connecting portion has the slit for stress relief, and the outer portion is positioned to contact the metal frame. Each portion is optimized for its specific function while maintaining overall integrity.
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 design effectively secures the electrical connection between the conductive elastic sheet and the metal frame, preventing peeling off and maintaining contact even when the sheet is bent, thus ensuring reliable charge release from the image display screen.
Implementation Method 1
at least one of the outer portion and the connecting portion of the conductive elastic sheet is bent in a height increasing direction from the same height position as the inner portion
Data Source
AI summary
A conductive elastic sheet includes: an outer portion sandwiched between a resin frame portion and a metal frame portion and brought into contact with the metal frame portion; an inner portion laminated to an image display screen; and a connecting portion connecting the outer and inner portions. An upper surface of the resin frame portion is arranged at a higher position than the image display screen. The outer portion of the conductive elastic sheet is arranged at a higher position than the inner portion. The inner portion of the conductive elastic sheet is laminated to the image display screen in a flat shape. The conductive elastic sheet has a slit formed between the outer and inner portions and adjacent to the connecting portion. The connecting portion is bent in a height increasing direction from the same height position as the inner portion.