Color Resistance Layer Grooves for LCD Storage Capacitance

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Solution Overview

Problem

The COA process in LCDs, which forms a color resistance layer between pixel electrodes and a common electrode, increases the distance between them, leading to decreased storage capacitance and issues like flicker and crosstalk.

Innovation Solution

The array substrate design includes grooves on the color resistance layer with pixel electrodes and data masking lines in different grooves, forming capacitive connections to enhance storage capacitance.

Engineering Contradictions & Design Principles

VSEngineering 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

Engineering Contradiction:

Improvedisplay stabilityVSAvoidstorage capacitance

Core Design Contradiction:

ReliabilityVSQuantity of substance

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.

Inventive Principle:

Principle #1Segmentation

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.

Inventive Principle:

Principle #3Local quality

2Ease of manufacture

Engineering Contradiction:

Improvefabrication process simplificationVSAvoidstorage capacitance

Core Design Contradiction:

Ease of manufactureVSQuantity of substance

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.

Inventive Principle:

Principle #1Segmentation

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.

Inventive Principle:

Principle #5Merging (Combining)

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

Engineering Contradiction:

Improvecolor resistance stabilityVSAvoidflicker and crosstalk

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

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.

Inventive Principle:

Principle #1Segmentation

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.

Inventive Principle:

Principle #24Intermediary (Mediator)

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 increases storage capacitance, addressing flicker and crosstalk issues by maintaining effective capacitive connections, ensuring stable display images.

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

Methodology Applied

Scientific EffectCapacitance: Capacitance

Data Source

PatentUS12550436B2Array substrate comprising color resistance layer, method for manufacturing array substrate and display panel

Publication Date: 2026.02.10 TCL CHINA STAR OPTOELECTRONICS TECHNOLOGY CO LTD

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.