Electrophoretic Display Device Lateral Electric Field Electrode Configuration
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Solution Overview
Problem
Current electrophoretic display devices face challenges in improving display performance, particularly in terms of transmittance and manufacturability, due to the need for complex electrode structures and power supply configurations.
Innovation Solution
The design of an electrophoretic display device with a configuration that includes an array substrate with common and pixel electrodes, an insulating layer, and an electrophoretic layer between the substrates, driven by a lateral electric field, which eliminates the need for counter-electrodes on the counter-substrate and simplifies the power supply, allowing for improved display performance and manufacturability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If complex electrode structures and power supply configurations are used in electrophoretic display devices, then display performance can be maintained, but device complexity and manufacturing difficulty increase
Solution Approach 1:
The patent removes the counter-electrode structure from the counter-substrate, extracting only the necessary electrode function from the complex assembly. This simplifies the overall device structure while maintaining the essential electrophoretic display functionality through a streamlined electrode configuration.
Solution Approach 2:
The common electrode on the array substrate serves multiple functions: it acts as an electrode for electrophoretic particle movement, provides a reference potential, and eliminates the need for separate counter-electrodes on the counter-substrate. This multi-functional design reduces device complexity while preserving display performance.
2Reliability
If complex electrode structures and power supply configurations are used in electrophoretic display devices, then display performance can be maintained, but ease of manufacture decreases
Solution Approach 1:
By removing the counter-electrode structure from the counter-substrate, the manufacturing process is simplified with fewer components to assemble and fewer steps to complete. This extraction of unnecessary structural elements directly improves ease of manufacture while maintaining core display functionality.
Solution Approach 2:
The patent merges the electrode function into the array substrate's common electrode, eliminating the need for separate counter-electrode structures on the counter-substrate. This consolidation reduces the number of manufacturing steps and simplifies the overall production process.
3Stability of the object's composition
If traditional electrophoretic display structures are used, then storage property is maintained, but transmittance is reduced
Solution Approach 1:
The patent removes the counter-electrode structure that was causing light blocking and interference. This extraction allows light to pass more freely through the display structure, improving transmittance while the remaining electrophoretic layer maintains its storage property through the applied electric field.
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 configuration enhances display performance by reducing the complexity of electrode structures and power supply requirements, leading to improved transmittance and manufacturability, while maintaining low power consumption.
Implementation Method 1
a drive unit which drives the electrophoretic elements by a lateral electric field generated between the pixel electrodes and the common electrode
Data Source
AI summary
According to one embodiment, an electrophoretic display device includes an array substrate including a base material, a common electrode on the base material, a plurality of pixel electrodes provided to face the common electrode, and an insulating layer provided between the common electrode and the pixel electrodes, a counter-substrate facing the array substrate, an electrophoretic layer including a plurality of electrophoretic elements and disposed between the array substrate and the counter-substrate, and a drive unit which drives the electrophoretic elements by a lateral electric field generated between the pixel electrodes and the common electrode.