E-Paper Display Adhesion Structure for Yield and Deformation Control
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Solution Overview
Problem
Existing electronic paper displays face issues with low yield ratios and high manufacturing costs due to adhesion defects, such as OCR leakage and non-uniform solidification, leading to deformation and structural instability under temperature and external forces.
Innovation Solution
An electronic paper display module with a rectangular double-sided tape layer, a surface cover with a decorating edge frame, a light adjustment sheet, and a supporting layer, enhancing mechanical strength and stability through a multi-layered structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a sticky layer is coated on the electronic paper surface to adhere the cover lens, then adhesion strength is improved, but manufacturing defects increase and yield ratio decreases
Solution Approach 1:
The patent removes the problematic sticky layer from the adhesion process and replaces it with a mechanical pressing structure that applies pressure through a pressing plate to bond the cover lens to the electronic paper housing without causing manufacturing defects
Solution Approach 2:
The patent introduces a pressing plate as an intermediary component that mediates the adhesion process by distributing pressure uniformly across the bonding surface, eliminating the need for sticky layers and preventing adhesion defects
2Ease of manufacture
If only frame areas are used for adhesion between electronic paper and cover lens, then manufacturing cost is reduced, but structural stability deteriorates
Solution Approach 1:
The patent segments the adhesion structure into multiple functional components: a pressing plate for uniform pressure application, a pressing member for applying force, and a pressing force transmitting member for force transmission, allowing cost-effective manufacturing while maintaining stability
Solution Approach 2:
The patent creates a composite adhesion system combining the pressing plate, pressing member, and pressing force transmitting member to achieve both cost-effectiveness and structural stability that neither component could provide alone
3Adaptability or versatility
If the electronic paper display module is subjected to temperature variation or external forces, then operational flexibility is improved, but deformation increases and structure is destroyed
Solution Approach 1:
The patent implements a pressing force transmitting member that beforehand cushions and distributes external forces and thermal expansion stresses across the bonding interface, preventing deformation and structural failure when the device undergoes temperature variation or external forces
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
Improves adhesion strength, prevents deformation, and enhances image quality by reducing glare and Newton rings, thereby increasing yield and reducing manufacturing costs.
Implementation Method 1
a rectangular double sided tape layer at a front surface of the electronic paper display module
Data Source
AI summary
An electronic paper display module with improved adhesion structure comprises: an electronic paper display module with an image display at a front structure thereof; a rectangular double sided tape layer at a front surface of the electronic paper display module; the rectangular double sided tape layer having a rectangular hollow inner space; a surface cover being on an upper side of the rectangular double sided tape layer; a peripheral edge of a lower surface of the surface cover being formed with a decorating edge frame; the decorating edge frame being a non-transparency or low transparency thin film layer; and a lower side of the decorating edge frame being adhered to an upper side of the rectangular double sided tape layer; a gluing layer installed at a lower bottom side of the electronic paper display module; and a supporting layer installed at a lower bottom side of the gluing layer.