Electro-Optic Device With Conductive Edge Seal for Active-Area Protection
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Solution Overview
Problem
Existing methods for forming electrical connections in electro-optic devices, such as electrophoretic displays, often result in damage to the conductive layers and reduce the active display area, and are limited by the need for precise backplane compatibility, making them inefficient and costly.
Innovation Solution
The use of a conductive edge seal composition, formed from materials like carbon black particles or carbon nanotubes, to electrically connect electrode layers outside the perimeter of the electrophoretic medium, ensuring the active display area remains intact and facilitating efficient manufacturing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing methods for forming electrical connections are used, then electrical connections are established, but the conductive layers are damaged and the active display area is reduced
Solution Approach 1:
The electrical connection function is segmented from the main electrode structure and placed in the edge seal region. The edge seal contains conductive particles that create electrical pathways between electrode layers without requiring damage to the conductive layers in the active display area.
Solution Approach 2:
The edge seal acts as an intermediary structure that provides electrical connection between electrode layers. It contains conductive particles embedded in a cured composition that bridges the electrode layers without requiring direct contact or damage to the conductive layers in the active area.
2Ease of manufacture
If existing connection methods are used, then electrical connections are formed, but manufacturing efficiency is reduced and costs increase
Solution Approach 1:
The electrical connection function is merged with the edge seal structure. The edge seal simultaneously provides mechanical sealing, structural support, and electrical connection functions by incorporating conductive particles in its composition, eliminating the need for separate connection structures.
Solution Approach 2:
The edge seal is designed as a multi-functional component that performs sealing, structural support, and electrical connection functions. This universal approach simplifies manufacturing by reducing the number of components and assembly steps required.
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
This method maintains the active display area and improves manufacturing efficiency by preventing damage to conductive layers while allowing for flexible and cost-effective production of electro-optic devices.
Implementation Method 1
The conductive edge seal electrically connects the first light-transmissive electrode at the first electrode contact location and the second electrode layer at the second electrode contact location
Data Source
AI summary
Improved electro-optic devices are disclosed comprising an electrophoretic material layer comprising electrophoretic medium disposed between electrodes, and a conductive edge seal. The conductive edge seal is not only used to prevent ingress of moisture in the device, but also to electrically connect the electrodes. An improved method of producing an electro-optic device having conductive edge seal is also disclosed.