Mother Glass Block Pattern for Uniform Color Filter Thickness

Solution Overview

Problem

Liquid crystal display panels suffer from non-uniform color depth and brightness due to thickness differences in color filters, caused by resin sagging during fabrication, leading to uneven light transmittance and deteriorated color characteristics.

Innovation Solution

A mother glass with a block pattern in the dummy region is used to prevent resin movement and ensure uniform thickness of color filters, achieved by forming a block pattern in the dummy region between array regions to block resin flow during processing.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If resin is applied on the entire surface of the mother glass without block patterns, then the fabrication process is simple, but resin sagging occurs causing non-uniform color filter thickness

Engineering Contradiction:

Improvefabrication process simplicityVSAvoidcolor filter thickness uniformity

Core Design Contradiction:

Ease of manufactureVSManufacturing precision

Solution Approach 1:

The mother glass is divided into array regions and dummy regions by block patterns. This segmentation prevents resin from flowing from the array region into the dummy region, thereby maintaining uniform color filter thickness in the array region while simplifying the overall fabrication process.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The block pattern acts as an intermediary barrier between the array region and dummy region. It blocks resin flow during the color filter formation process, preventing sagging and ensuring uniform thickness without requiring complex process adjustments.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Manufacturing precision

If block patterns are added to prevent resin movement, then color filter thickness uniformity is improved, but the device complexity increases

Engineering Contradiction:

Improvecolor filter thickness uniformityVSAvoidmother glass structure complexity

Core Design Contradiction:

Manufacturing precisionVSDevice complexity

Solution Approach 1:

The mother glass is divided into array regions and dummy regions by block patterns. This segmentation prevents resin from flowing from the array region into the dummy region, thereby maintaining uniform color filter thickness in the array region while simplifying the overall fabrication process.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Block patterns are selectively formed only in the dummy region, not throughout the entire mother glass. This local application of the block pattern provides the necessary resin blocking function while minimizing the increase in device complexity to only the essential areas.

Inventive Principle:

Principle #3Local quality

3Ease of manufacture

If resin can move freely during fabrication, then the fabrication process is simple, but light transmittance becomes non-uniform

Engineering Contradiction:

Improvefabrication process simplicityVSAvoidlight transmittance uniformity

Core Design Contradiction:

Ease of manufactureVSIllumination intensity

Solution Approach 1:

The mother glass is divided into array regions and dummy regions by block patterns. This segmentation prevents resin from flowing from the array region into the dummy region, thereby maintaining uniform color filter thickness in the array region while simplifying the overall fabrication process.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The block pattern acts as an intermediary barrier between the array region and dummy region. It blocks resin flow during the color filter formation process, preventing sagging and ensuring uniform thickness without requiring complex process adjustments.

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS7763400B2Mother glass and method of fabricating liquid crystal display panel using the same

Publication Date: 2010.07.27 LG DISPLAY CO LTD

AI summary

A mother glass and a method of fabricating a liquid crystal display panel using the mother glass provides improved color characteristics and brightness. The mother glass is provided with a plurality of color filter arrays that include at least one block pattern located at a dummy region between the color filter arrays for substantially preventing the movement of color resin on the mother glass.