Array Substrate Electrode Concave-Convex Structure Scattering Light
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Solution Overview
Problem
In existing array substrates for display devices, the first electrode reflects external incident light, leading to decreased light utilization and lowered recognizability of displayed images due to excessive light concentration.
Innovation Solution
A non-transparent metal electrode with a concave-convex structure is integrated on the array substrate's passivation layer to scatter external incident light, and optionally includes strip-shaped and planar sub-electrodes, which are formed using materials like molybdenum, aluminum, or copper, to diffuse light and improve visibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a non-transparent metal electrode is used as the first electrode, then the electrode can effectively block external incident light and improve display contrast, but it reflects external incident light causing degraded external visibility and decreased light utilization ratio
Solution Approach 1:
The first electrode surface is designed with a concave-convex structure featuring curved surfaces instead of a flat surface. This curvature causes incident light to reflect in multiple directions rather than creating a concentrated reflection, thereby reducing the harmful reflective effect while maintaining the electrode's light-blocking capability for display contrast
Solution Approach 2:
The first electrode is designed with different surface properties in different regions - the concave-convex structure is specifically applied to the surface that faces external incident light to scatter reflections, while the underlying electrode material maintains its non-transparent property to block light and provide contrast. This localized application of different surface qualities resolves the contradiction between light blocking and reflection reduction
2Device complexity
If external incident light is concentrated by the first electrode, then the electrode structure is simple, but external visibility and recognizability of displayed pictures are lowered
Solution Approach 1:
By introducing a concave-convex surface structure to the first electrode, the patent transforms the simple flat surface into a structured surface that scatters light. While this increases structural complexity slightly, it effectively prevents light concentration and improves external visibility, demonstrating that the added complexity is justified by the significant improvement in display performance
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 concave-convex structure on the first electrode effectively diffuses external light, enhancing external visibility and recognizability of displayed images by preventing excessive light concentration, thereby improving the display effect.
Implementation Method 1
surface of the first electrode is provided with a concave-convex structure for scattering external incident light
Data Source
AI summary
The present invention discloses an array substrate and a manufacturing method thereof, and a display apparatus. The array substrate comprises a base substrate, and a thin film transistor, a color filter layer and a first passivation layer provided on the base substrate. The surface of the first electrode provided by the present invention is provided with a concave-convex structure that can scatter external incident light, so that incident light from outside is diffusely reflected, thereby avoiding excessive concentration of light and improving external visibility and recognizability of the displayed pictures.