Cover Tape Curvature and Segmentation for Display Shielding
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Solution Overview
Problem
Display devices face increasing malfunction issues due to electromagnetic interference noise, which affects the integration and operation of electronic components such as antennas and GPS systems.
Innovation Solution
A display device design featuring a cover tape with a conductive and insulating layer, including a cutout portion curved with a predetermined curvature, which reduces repulsive forces and enhances adhesive properties, thereby effectively shielding electromagnetic interference and preventing partial lifting during attachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the cover tape is curved with a predetermined curvature to cover the driving chip and circuit board, then the electromagnetic interference shielding is improved, but the repulsive force during attachment increases causing partial lifting
Solution Approach 1:
The cover tape is divided into multiple portions (first portion covering driving chip, second portion with curvature, third portion covering circuit board) with a cutout portion in the second portion. This segmentation allows each portion to be optimized for its specific function while reducing overall attachment resistance
Solution Approach 2:
The cover tape comprises a conductive layer and an insulating layer disposed on the conductive layer, forming a composite structure that provides both electromagnetic interference shielding and electrical insulation while managing attachment forces
2Object-affected harmful factors
If the cover tape is attached to cover the driving chip and circuit board, then the electromagnetic interference shielding is improved, but the adhesive properties deteriorate causing partial lifting
Solution Approach 1:
The cover tape is segmented into multiple portions with a cutout in the curved second portion, allowing differential adhesion strategies for each portion while maintaining overall shielding effectiveness
Solution Approach 2:
Different portions of the cover tape have different structural properties (curved vs. flat, with or without cutout) optimized for their specific attachment requirements and shielding functions
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 suppresses the phenomenon of partial lifting of the cover tape and improves the attachment process, while also preventing tearing during rework and shielding electromagnetic interference noise, thus enhancing the reliability and functionality of the display device.
Implementation Method 1
a cover tape covering each of the driving chip and the first circuit board and including a cutout portion... including a conductive layer and an insulating layer disposed on the conductive layer... shielding electromagnetic interference noise
Data Source
AI summary
A display device includes: a display substrate including a display area and a pad area adjacent to one side of the display area; a driving chip disposed on the pad area of the display substrate; a first circuit board disposed under the display substrate and electrically connected to the pad area; and a cover tape covering each of the driving chip and the first circuit board and including a cutout portion.