Electro-wetting Display Bumpy Reflective Surface
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Solution Overview
Problem
Current electro-wetting display panels have low reflectivity and slow response speed due to their flat reflective surfaces, which hinder their performance in displaying images effectively.
Innovation Solution
The design incorporates a bumpy reflective surface and an optimized pixel electrode structure to enhance reflectivity and response speed, with a transparent pixel electrode exposing portions of the bumpy surface and using specific hydrophobic/hydrophilic properties for the dielectric and wall structures, along with non-polar and polar liquids.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a flat reflective surface is used in the electro-wetting display panel, then the manufacturing process is simple, but the reflectivity is low
Solution Approach 1:
The reflective layer surface is designed with bumps instead of being flat, creating a curved surface structure. This curvature increases the reflectivity by scattering and redirecting light more effectively across the display panel surface, directly resolving the contradiction between simple manufacturing and high reflectivity.
2Speed
If the liquid in the electro-wetting display panel moves slowly, then the system stability is maintained, but the response speed is slow
Solution Approach 1:
The patent modifies physical parameters including the viscosity of liquids, surface tension characteristics, and interfacial energy between liquid layers. By adjusting these parameters, the liquid achieves faster movement speed while maintaining stable behavior through controlled surface properties and electro-wetting effects.
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 improves reflectivity and accelerates the movement of liquids within the display panel, resulting in better display quality and faster response times.
Implementation Method 1
the pixel electrode can quickly drive the first liquid containing dyes to move or increase the area of the opening
Implementation Method 2
the reflective surface of the reflective layer is a flat reflective surface... the reflectivity of the reflective layer having the flat reflective surface is quite low... the reflective layer has a bumpy surface
Implementation Method 3
using specific hydrophobic/hydrophilic properties for the dielectric and wall structures
Data Source
AI summary
An electro-wetting display panel including an active device array substrate, a dielectric layer, a wall structure, a first liquid containing dyes, a second liquid, and an opposite substrate is provided. The active device array substrate includes a substrate, scan lines, data lines, and pixels. The pixels are electrically connected with the scan lines and the data lines accordingly. Each pixel includes an active device, a transparent pixel electrode, and a reflective layer. The transparent pixel electrode located above the reflective layer is electrically connected with the active device. The reflective layer has a bumpy surface. The dielectric layer is disposed on the active device array substrate. The wall structure is disposed on the dielectric layer. The first liquid is disposed on the dielectric layer. The opposite substrate is disposed above the active device array substrate. The second liquid is disposed between the active device array substrate and the opposite substrate.