Electrophoretic Display Multifunctional Plate to Reduce Optical Reflection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional electrophoretic displays are thick and suffer from reduced optical performance due to multiple functional layers and interfacial reflections.
Innovation Solution
A multifunctional plate integrating a transparent substrate, a first transparent conductive layer, and a transparent adhesive layer is used, which serves as both an electrode for the display medium and a touch panel, replacing separate layers for protection and touch sensing, thereby reducing thickness and interfacial reflections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple functional layers (protection sheet, touch sensor panel, common electrode layer) are added to the electrophoretic display, then the display achieves protection and touch sensing functionality, but the display module becomes thicker and optical performance deteriorates due to increased interfacial reflection
Solution Approach 1:
The patent combines the protection sheet, touch sensor panel, and common electrode layer into a single integrated multifunctional plate structure. The transparent substrate serves as both protection layer and touch sensor substrate, while the transparent conductive layer functions as both the common electrode for electrophoretic display and the electrode layer for touch sensing. This merging eliminates the need for separate layers and reduces the overall thickness of the display module.
Solution Approach 2:
The transparent conductive layer is designed to perform multiple functions simultaneously: it serves as the common electrode for driving the electrophoretic display medium and as the electrode layer for the touch sensor panel. The transparent substrate provides both mechanical protection for the display medium and serves as the base for the touch sensor functionality. This multi-functionality reduces the number of separate components needed.
2Reliability
If multiple functional layers are added to the electrophoretic display, then protection and touch sensing are enabled, but optical performance is reduced due to more interfacial reflection
Solution Approach 1:
By merging the protection sheet, touch sensor panel, and common electrode layer into a single integrated structure with fewer interfaces, the patent reduces the number of interfaces where light reflection can occur. The integrated design minimizes optical losses while maintaining all necessary functions.
Solution Approach 2:
The patent uses transparent materials with optimized optical properties for the substrate and conductive layers. The transparent conductive layer is specifically designed to be highly transparent to minimize optical interference, ensuring that the display maintains good optical performance despite the integrated multi-functional design.
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 solution results in a thinner and optically superior electrophoretic display with improved reliability and reduced optical losses.
Implementation Method 1
The transparent adhesive layer is disposed on a bottom side of the transparent substrate facing the display medium layer, wherein resistivity of the transparent adhesive layer ranges from 10^6 ohm-cm to 10^12 ohm-cm. The first transparent conductive layer serves as both an electrode of the display medium layer and an electrode layer of a touch panel.
Implementation Method 2
An electrophoretic display is composed of several functional layers including a display medium layer, a common driving electrode plane, a barrier film, a touch sensor, a front light guide plate and a cover lens.
Data Source
AI summary
An electrophoretic display device including a backplane, a display medium layer, and a multifunctional plate is provided. The display medium layer is disposed on the backplane. The multifunctional plate is disposed on the display medium layer and includes a transparent substrate, a first transparent conductive layer, and a transparent adhesive layer. The first transparent conductive layer is disposed on the transparent substrate. The transparent adhesive layer is disposed on a bottom side of the transparent substrate facing the display medium layer, wherein resistivity of the transparent adhesive layer ranges from 106 ohm-cm to 1012 ohm-cm. The first transparent conductive layer serves as both an electrode of the display medium layer and an electrode layer of a touch panel.