Bending Part Pattern for Display Device Stress Relief
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Solution Overview
Problem
Display devices face challenges in reliability and manufacturing yield due to the stress and heat damage incurred during the bending process, particularly when using laser cutting methods, which can lead to defects and reduced performance.
Innovation Solution
Incorporating a pattern part with inorganic or metallic materials between the side ends and wires of the bending part, which helps in reducing heat damage and stress by acting as a protective layer, and arranging patterns in specific configurations to prevent crack propagation and enhance flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If laser cutting method is used for bending part, then manufacturing precision is improved, but heat damage and stress increase leading to reduced reliability
Solution Approach 1:
The pattern part acts as an intermediary element between the side end and the wires. It is disposed between them when viewed from a plan view, serving as a buffer that absorbs heat and stress from the laser cutting process, thereby protecting the wires from heat damage while maintaining manufacturing precision of the bending part.
Solution Approach 2:
The pattern part provides beforehand cushioning by being positioned between the side end and the wires before the laser cutting process occurs. This pre-positioned structure cushions the wires from the thermal and mechanical stress that will be generated during laser cutting, preventing heat damage and crack formation in advance.
2Ease of operation
If bending part is made flexible, then ease of operation is improved, but stress and heat damage during bending increase leading to reduced manufacturing yield
Solution Approach 1:
The pattern part serves as a protective intermediary between the flexible side end and the wires. It allows the bending part to maintain flexibility for ease of operation while simultaneously protecting the wires from stress and heat damage during the bending process, thereby preserving manufacturing yield.
Solution Approach 2:
The pattern part is strategically disposed between the side end and the wires, providing localized protection where it is most needed. This local quality approach allows the bending part to be flexible overall while having a specific protective zone that prevents stress concentration and heat damage to the wires during bending operations.
Data Source
AI summary
A display device includes a display part which displays an image, a pad part electrically connected to the display part, and a bending part disposed between the display part and the pad part to connect the display part and the pad part, where the bending part has a side end extending from the display part to the pad part. The bending part includes a base layer, a plurality of wires disposed on the base layer and electrically connected to the display part and the pad part, and a pattern part disposed between the side end and the plurality of wires when viewed from a plan view.