Electrophoretic Display Panel With Pressure-Sensitive Gap
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Solution Overview
Problem
Current electrophoretic display panels with rewritable functions require complex structural arrangements and higher production costs due to the integration of a thin-film transistor array and touch panel, making them costly and inefficient.
Innovation Solution
An electrophoretic display panel design featuring a first electrode layer, a second electrode layer, an electrophoretic display layer, and a low surface energy coating layer, with spacers to create a gap that changes with pressure, allowing for a rewritable function by altering the electric field and particle distribution using different voltage signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a thin-film transistor array and touch panel are integrated to achieve rewritable function, then the electrophoretic display panel can be used similarly to an electronic writing board, but the structural arrangement becomes complicated and production costs increase
Solution Approach 1:
The patent extracts and removes the complex thin-film transistor array and touch panel components from the electrophoretic display panel structure. Instead, it uses a simplified design with only two electrode layers and an electrophoretic display layer, achieving the rewritable function through a pressure-sensitive gap mechanism rather than through complex active matrix structures.
Solution Approach 2:
The patent employs inexpensive spacer elements and simple electrode layers instead of costly thin-film transistor arrays. The spacers are simple structural components that can be easily manufactured and replaced, providing a cost-effective solution for achieving press-sensitive gap control without requiring complex or expensive components.
2Adaptability or versatility
If a thin-film transistor array and touch panel are integrated to achieve rewritable function, then the electrophoretic display panel can be used similarly to an electronic writing board, but production costs increase
Solution Approach 1:
The patent employs inexpensive spacer elements and simple electrode layers instead of costly thin-film transistor arrays. The spacers are simple structural components that can be easily manufactured and replaced, providing a cost-effective solution for achieving press-sensitive gap control without requiring complex or expensive components.
Solution Approach 2:
The patent extracts and removes the complex thin-film transistor array and touch panel components from the electrophoretic display panel structure. Instead, it uses a simplified design with only two electrode layers and an electrophoretic display layer, achieving the rewritable function through a pressure-sensitive gap mechanism rather than through complex active matrix structures.
3Ease of operation
If the gap distance between the first electrode layer and electrophoretic display layer is changed with press operation, then the electric field and particle distribution can be controlled for writing function, but the electrode layers may stick together
Solution Approach 1:
The patent introduces a low surface energy coating layer as an intermediary between the first electrode layer and the electrophoretic display layer. This coating acts as a release agent that prevents direct adhesion between the two surfaces, allowing them to come into close contact for writing operations while preventing permanent sticking. The coating layer mediates the interaction between the electrode and display layer, enabling reliable repeated contact and separation.
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
The design provides an excellent rewritable quality by preventing sticking issues and maintaining writing functionality while reducing production costs through the use of a low surface energy coating and spacers, enabling efficient operation in both writing and refresh states.
Implementation Method 1
A low surface energy coating layer is coated on at least one of the second surface of the first electrode layer and the third surface of the electrophoretic display layer
Implementation Method 2
The first electrode layer and the second electrode layer respectively receive two different voltage signals to provide an electric field between the first electrode layer and the second electrode layer. The electric field passing through the electrophoretic display layer is changed with the gap distance. Accordingly, a distribution state of colored particles in the electrophoretic display layer depends on the press operation
Data Source
AI summary
An electrophoretic display panel including a first electrode layer, a second electrode layer, an electrophoretic display layer and a low surface energy coating layer is provided. The first electrode layer has a first surface and a second surface corresponding to the first surface. The electrophoretic display layer is disposed between the first electrode layer and the second electrode layer. The electrophoretic display layer has a third surface. The third surface of the electrophoretic display layer and the second surface of the first electrode layer have a gap therebetween. A gap distance of the gap is changed with a press operation. The low surface energy coating layer is coated on at least one of the second surface of the first electrode layer and the third surface of the electrophoretic display layer.