Hybrid Flexible Display Panel with Glass Substrate
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Solution Overview
Problem
Conventional flexible displays face challenges with reliability against heat and moisture, and integrating a touch screen panel is difficult due to their thin plastic substrate, which limits their performance and applicability compared to glass substrates.
Innovation Solution
A flexible display panel design incorporating a non-flexible first substrate in a flat area and a flexible second substrate with a curved or folded shape, along with a thin film encapsulation member, which allows for a hybrid structure that maintains image signal consistency and supports the panel's shape, enabling enhanced durability and touch screen functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a thin plastic substrate is used to achieve flexibility and paper-like folding, then the display can be folded or rolled without damage, but the reliability against heat and moisture deteriorates
Solution Approach 1:
The patent employs a composite structure combining a flexible substrate with a glass substrate. The flexible substrate provides the desired flexibility and foldability, while the glass substrate serves as a supporting substrate that provides thermal and moisture stability. This composite approach allows the display to achieve both flexibility and reliability simultaneously.
2Reliability
If a glass substrate is used to improve reliability and enable touch screen integration, then protection and touch functionality are enhanced, but the ability to fold and roll like paper is lost
Solution Approach 1:
The patent divides the substrate structure into two distinct segments: a flexible substrate segment that provides foldability and a glass substrate segment that provides protection and touch functionality. By selectively removing the glass substrate in certain areas while maintaining it in others, the display achieves both flexibility and structural integrity.
3Ease of manufacture
If a supporting substrate is used during manufacturing to ensure structural stability, then the display can be manufactured with proper alignment, but the final flexible form factor is compromised
Solution Approach 1:
The patent uses a glass substrate as a supporting substrate during the manufacturing process to ensure proper alignment and structural stability. The glass substrate is selectively removed after the display elements are formed, allowing the flexible substrate to achieve its final flexible form factor while maintaining the manufacturing advantages of having a rigid support during production.
Data Source
AI summary
A flexible display panel includes a non-flexible first substrate in a first display area, a flexible second substrate in a second display area, a light emitting unit on a side of the first and second substrates, and a thin film encapsulation member on the light emitting unit.