Array Substrate Groove Layout for Higher LCD Storage Capacitance
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Solution Overview
Problem
The increase in distance between pixel electrodes and a common electrode due to the fabrication of a color resistance layer between them leads to a decrease in storage capacitance, resulting in poor display issues such as flicker and crosstalk in liquid crystal display (LCD) technology.
Innovation Solution
An array substrate design featuring first and second grooves on the color resistance layer, with parts of the pixel electrodes located in these grooves to form a capacitance with the data masking line, increasing the storage capacitance by maximizing the effective facing area between electrodes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a color resistance layer is fabricated between pixel electrodes and a common electrode, then color resistance shift caused by alignment shift is reduced and fabrication process of color film substrate is simplified, but distance between pixel electrodes and common electrode increases, resulting in decrease of storage capacitance
Solution Approach 1:
The invention segments the color resistance layer by forming grooves that divide it into multiple regions. This segmentation allows different portions of the color resistance layer to serve different functions: some regions maintain color filtering while others facilitate capacitive coupling, thus resolving the contradiction between display stability and storage capacitance.
Solution Approach 2:
The invention applies local quality by creating grooves with specific dimensions (depth of 50-200nm, width of 5-20μm) in the color resistance layer. These localized structural modifications enable certain areas to have enhanced capacitive properties while maintaining color resistance functionality in other areas, thereby balancing display stability and storage capacitance.
2Ease of manufacture
If a color resistance layer is fabricated between pixel electrodes and a common electrode, then color resistance shift caused by alignment shift is reduced and fabrication process of color film substrate is simplified, but distance between pixel electrodes and common electrode increases, resulting in decrease of storage capacitance
Solution Approach 1:
The segmentation of the color resistance layer through groove formation maintains the COA process simplicity while adding capacitive functionality. The grooves are formed using standard semiconductor fabrication techniques, preserving ease of manufacture while enabling increased storage capacitance through the created capacitive structures.
Solution Approach 2:
The invention merges the color resistance function with the storage capacitance function within the same color resistance layer structure. By forming grooves that create capacitive coupling regions, the layer simultaneously performs color filtering and capacitance storage, maintaining fabrication simplicity while improving storage capacitance.
3Reliability
If distance between pixel electrodes and common electrode is increased due to color resistance layer fabrication, then color resistance shift is reduced, but storage capacitance decreases, leading to poor display such as flicker and crosstalk
Solution Approach 1:
The grooves segment the color resistance layer to create localized capacitive regions that compensate for the overall increased distance. This segmentation allows the structure to maintain color resistance stability while providing sufficient capacitance to prevent flicker and crosstalk.
Solution Approach 2:
The grooves act as intermediaries that facilitate capacitive coupling between pixel electrodes and common electrode despite the increased distance caused by the color resistance layer. These structured regions provide a pathway for electric field coupling, thereby preventing flicker and crosstalk while maintaining color stability.
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 design enhances the storage capacitance, thereby addressing the issues of flicker and crosstalk and ensuring stability of the display image by optimizing the capacitance between the pixel electrodes and the common electrode.
Implementation Method 1
a part of the pixel electrodes are located in the second groove to form a first capacitance with the data masking line in the first groove
Data Source
AI summary
Disclosed is an array substrate, a method for manufacturing an array substrate, and a display panel. The array substrate includes a substrate layer, a common electrode layer, and a color resistance layer. A first groove and a second groove are formed on a side surface of the color resistance layer away from the substrate layer. A data masking line layer and a pixel electrode layer are formed on the color resistance layer. A part of the data masking line layer is located in the first groove, and another part of the pixel electrode layer is located in the second groove to form a first capacitance with the data masking line layer in the first groove.