Liquid Crystal Display Panel Conductive Material Columns Black Matrix

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Solution Overview

Problem

Liquid crystal display panels face a challenge in maintaining a high aperture ratio while effectively preventing light leakage, as large black matrices required to prevent light leakage significantly reduce the aperture ratio, especially in high-resolution displays.

Innovation Solution

A liquid crystal display panel design featuring a counter substrate with a conductive material layer and a black matrix layer where the conductive material columns overlap with the black matrix columns, allowing for a reduced black matrix width without compromising light leakage prevention, thereby maintaining a high aperture ratio.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If a black matrix with a larger area is used to prevent light leakage, then light leakage prevention is improved, but the aperture ratio is reduced

Engineering Contradiction:

Improvelight leakageVSAvoidaperture ratio

Core Design Contradiction:

Object-affected harmful factorsVSArea of stationary object

Solution Approach 1:

The invention divides the light leakage prevention function into two separate components: a conductive material layer for electrical control and a black matrix layer for optical blocking. This segmentation allows each layer to be optimized independently, with the black matrix being thinner since the conductive layer handles part of the light leakage control function.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The invention uses a composite structure combining a conductive material layer (such as ITO or IZO) with a black matrix layer. This composite approach allows the conductive layer to provide electrical control over light leakage while the black matrix provides optical absorption, achieving better light leakage prevention with a reduced black matrix width.

Inventive Principle:

Principle #40Composite materials

2Area of stationary object

If the black matrix width is reduced to maintain high aperture ratio, then aperture ratio is improved, but light leakage prevention capability is worsened

Engineering Contradiction:

Improveaperture ratioVSAvoidlight leakage

Core Design Contradiction:

Area of stationary objectVSObject-affected harmful factors

Solution Approach 1:

The conductive material layer serves multiple functions: it acts as a transparent electrode for electrical control and simultaneously provides partial light leakage prevention. This multi-functionality allows the black matrix to be reduced in width while maintaining overall light leakage control effectiveness.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The invention changes the parameters of the light leakage prevention system by introducing a conductive material layer with specific electrical and optical properties. This allows control of light leakage through electrical parameters (voltage, conductivity) rather than solely relying on the physical dimensions of the black matrix.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS10558073B2Display substrate, liquid crystal display panel and fabricating method thereof, and liquid crystal display apparatus

Publication Date: 2020.02.11 BOE TECHNOLOGY GROUP CO LTD

AI summary

The present application discloses a liquid crystal display panel including an array substrate having a data line layer including a plurality of columns of data lines; a counter substrate facing the array substrate, including a base substrate and a conductive material layer on the base substrate having a plurality of conductive material columns for preventing light leakage; and a black matrix layer having a plurality of black matrix columns corresponding to the plurality of conductive material columns and the plurality of columns of data lines.