Array Substrate with Shielding Electrodes for Uniform Brightness
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Solution Overview
Problem
Existing multifunctional display panels experience differences in brightness and darkness due to metal layers obstructing light transmittance in the functional area, affecting overall visual effect and contrast.
Innovation Solution
An array substrate with a base substrate, sensing units, a planarization layer, and pixel electrodes, where diffusion particles are incorporated in the planarization layer to align sensing units with pixel electrodes, and shielding electrodes are used to ensure uniform voltage differences and light distribution, eliminating brightness differences between metal-covered and non-metal-covered areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If metal layers are introduced in the functional area to achieve sensing functions, then sensing capabilities are improved, but light transmittance deteriorates causing brightness differences
Solution Approach 1:
A transparent conductive oxide (TCO) layer is introduced as an intermediary between the metal layers and the liquid crystal layer. This TCO layer serves as a mediator that allows light to pass through while still providing the necessary electrical conductivity for the sensing functions, thus resolving the conflict between metal layer functionality and light transmittance
Solution Approach 2:
The patent changes the material parameter of the conductive layer from traditional metal to transparent conductive oxide, fundamentally altering the optical properties while maintaining electrical functionality. This parameter change enables both sensing capability and light transmittance to coexist
2Adaptability or versatility
If different areas in the functional area have different voltage differences with the common electrode, then sensing functions are achieved, but liquid crystal molecule deflection angles become different causing brightness and darkness differences
Solution Approach 1:
The TCO layer is configured to provide a substantially uniform voltage distribution across the functional area. By establishing equipotential conditions, the patent ensures that liquid crystal molecules experience uniform electric fields and deflect at consistent angles, eliminating brightness variations while maintaining sensing functionality
Solution Approach 2:
The patent modifies the electrical parameter distribution by introducing the TCO layer, which smooths out voltage differences across different areas. This parameter change ensures uniform electric field distribution, leading to consistent liquid crystal molecule deflection and uniform brightness
3Adaptability or versatility
If metal layers are used in the functional area, then sensing capabilities are enhanced, but contrast ratio deteriorates due to light leakage
Solution Approach 1:
The TCO layer acts as an intermediary that replaces metal layers in direct contact with the liquid crystal layer. This intermediary layer provides the necessary electrical connectivity for sensing while maintaining optical transparency, thereby improving contrast ratio by eliminating light leakage paths
Solution Approach 2:
The patent changes the material parameter from metal to transparent conductive oxide, fundamentally altering the optical absorption characteristics. This parameter change eliminates the light-blocking effect of metal layers, thereby improving contrast ratio while preserving sensing capabilities
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 ensures uniform brightness across both metal-covered and non-metal-covered areas in the functional region, improving visual effect and contrast by aligning deflection angles of liquid crystal molecules and diffusing light through metal-covered areas.
Implementation Method 1
liquid crystal molecules in the liquid crystal layer are deflected under an action of the electric field
Implementation Method 2
liquid crystal molecules in the liquid crystal layer are deflected
Implementation Method 3
diffusing light through metal-covered areas
Data Source
AI summary
The present application provides an array substrate, a manufacturing method thereof, and a display panel. A display area of the array substrate includes a functional area, a sensing unit is arranged on a part of a base substrate corresponding to the functional area, the sensing unit is aligned with a pixel electrode, and a metal-covered area and a non-metal-covered area can form a same voltage difference with a common electrode, so that a deflection angle of each part of liquid crystal molecules in the functional area is consistent, and a problem of a difference between brightness and darkness of the display panel is solved.