Electric Paper Display Panel With Waterproof Encapsulation for Narrow Borders
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Solution Overview
Problem
Existing electric paper display panels require a significant border width for packaging, leading to noticeable borders that affect user experience and functionality.
Innovation Solution
A narrow-border design is achieved by using a package layer with waterproof and plastic properties to three-dimensionally encapsulate the substrate and display medium layer, comprising a top, side, and bottom package portions, with stretchable conductive electrode layers and substrates made of materials like glass, metal, or polymers with waterproof properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional package structure is used, then the display panel has good protection and waterproofing, but the border width increases significantly affecting user experience
Solution Approach 1:
The patent employs a package layer made of flexible waterproof material that forms a thin three-dimensional encapsulation structure. This flexible shell approach provides effective waterproofing while minimizing the border width, as the material can conform to the substrate and display medium layer without requiring thick rigid structures.
Solution Approach 2:
The package layer utilizes composite material construction combining waterproof polymer material with inorganic waterproof coatings (silicon oxide, silicon nitride, or silicon oxynitride). This composite structure enhances waterproofing performance while maintaining thin profile, resolving the contradiction between protection and border width reduction.
2Area of stationary object
If the package layer is made thin to reduce border width, then the display area increases, but waterproofing performance may deteriorate
Solution Approach 1:
The package layer combines thin waterproof polymer material with inorganic waterproof coatings (silicon oxide, silicon nitride, or silicon oxynitride) to achieve enhanced waterproofing in a thin structure. This composite material approach allows minimal border width while maintaining robust waterproofing performance.
Solution Approach 2:
The patent changes the waterproofing mechanism from relying on thickness to relying on material composition and surface treatment. By modifying the material parameters (using waterproof polymers with inorganic coatings) rather than increasing dimensional parameters, the design achieves both thin profile and effective waterproofing.
3Stability of the object's composition
If stretchable conductive materials are used in electrode layers, then flexibility and durability improve, but manufacturing complexity increases
Solution Approach 1:
The patent changes the material parameters of the electrode layers from conventional rigid conductive materials to stretchable conductive materials. This parameter change enables the electrode layers to flex and deform with the substrate, improving overall flexibility and durability while the materials themselves are designed to maintain electrical conductivity under deformation.
Data Source
AI summary
An electric paper display panel includes a first substrate, a second substrate, in which the first substrate is disposed opposite to the second substrate, a display medium layer disposed between the first substrate and the second substrate, and a package layer disposed on the first substrate and including a top package portion, a side package portion, and a bottom package portion that are formed in a one-piece form. The top package portion overlaps the first substrate. The side package portion extends from the first substrate to the second substrate. The bottom package portion covers a backside surface of the second substrate.