Flexible Display Buffer Portion Rigidity via Composite Glass
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Solution Overview
Problem
The manufacturing process of flexible display panels is costly due to the need for expensive laser equipment and can result in defects from surface roughness and foreign materials during the delamination of polyimide film substrates, while the folding portions of these panels lack sufficient rigidity, leading to issues like creases and hinge stains.
Innovation Solution
A flexible display panel design that uses a glass substrate with a buffer portion comprising an organic filler and glass, where the glass thickness is reduced in specific patterns to enhance rigidity, and incorporates quantum dot beads to improve color reproducibility and viewing angles, eliminating the need for laser separation and reducing manufacturing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a polyimide film substrate is used for flexible display, then flexibility is improved, but manufacturing cost increases due to expensive laser equipment and defects occur from surface roughness and foreign materials during delamination
Solution Approach 1:
The patent extracts and removes the polyimide film substrate from the final product structure, using it only as a temporary carrier during manufacturing. The substrate is deliberately designed to be separated after the active layers are formed, eliminating the need for expensive laser delamination equipment while maintaining manufacturing simplicity.
Solution Approach 2:
The patent performs preliminary actions by forming all active layers (circuit layer, light-emitting element layer, encapsulation layer) on the polyimide film substrate before separation. This preliminary formation of functional layers on a simple, inexpensive substrate avoids the need for complex laser equipment during the manufacturing process.
2Adaptability or versatility
If the folding portion is made of only organic material to allow flexible bending, then flexibility is improved, but rigidity becomes weak causing folded creases and hinge stains
Solution Approach 1:
The patent applies composite materials by combining organic filler material with inorganic glass particles in the buffer portion. This composite structure provides both the flexibility needed for bending and the rigidity required to prevent creases and hinge stains, resolving the contradiction between softness and structural strength.
Solution Approach 2:
The patent applies local quality by creating a buffer portion with specific local properties (composite of organic filler and glass particles) only in the folding area, while other portions of the display maintain their original structure. This localized modification provides rigidity where needed without compromising overall flexibility.
Data Source
AI summary
A flexible display panel includes a glass substrate, a circuit layer disposed on the glass substrate and configured to drive a pixel, a light-emitting element layer disposed on the circuit layer, an encapsulation layer which covers the circuit layer and the light-emitting element layer, a polarizing plate disposed on the encapsulation layer, and a cover glass disposed on the polarizing plate, at least one of the glass substrate and the cover glass includes a buffer portion, the buffer portion includes an organic filler and glass, the glass of the buffer portion has a thickness less than or equal to a thickness of the glass substrate and includes a pattern of a specific shape, thus, rigidity of a folding portion in which the buffer portion is located can be increased due to the glass in the buffer portion.