Color Filter Substrate Using Glass Layers for Thermal Stability

Solution Overview

Problem

The existing color filter substrates for TFT-LCDs have low thermal stability and uniformity due to the use of macromolecular photoresist, which affects the stability and purity of the color filter layers, leading to suboptimal display performance and a short lifespan.

Innovation Solution

A color filter substrate is manufactured using a glass substrate with a black matrix pattern and color filter layers formed by encapsulating a macromolecular osmosis film with carbon powder grains in a molten glass liquid, followed by filling and firing glass raw materials mixed with colorants to create stable and uniform glass layers in primary colors, enhancing thermal stability and transmissivity.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If macromolecular photoresist is used to form color filter layers, then the manufacturing process is simple, but thermal stability and uniformity are poor

Engineering Contradiction:

Improvemanufacturing process simplicityVSAvoidthermal stability

Core Design Contradiction:

Ease of manufactureVSStability of the object's composition

Solution Approach 1:

The patent changes the material parameter from macromolecular photoresist to glass-based materials. The color filter layers are formed by firing glass raw materials mixed with colorants, fundamentally changing the material composition to achieve superior thermal stability while maintaining manufacturability through established glass processing techniques

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent employs composite materials by combining glass raw materials with specific colorants (metal oxides) to create color filter layers with both structural integrity and optical properties. This composite approach allows the material to exhibit both thermal stability and color filtration capabilities

Inventive Principle:

Principle #40Composite materials

2Ease of manufacture

If macromolecular photoresist is used to form color filter layers, then the manufacturing process is simple, but uniformity and color purity are poor

Engineering Contradiction:

Improvemanufacturing process simplicityVSAvoiduniformity and color purity

Core Design Contradiction:

Ease of manufactureVSManufacturing precision

Solution Approach 1:

The patent changes the material parameter from macromolecular photoresist to glass-based materials. The color filter layers are formed by firing glass raw materials mixed with colorants, fundamentally changing the material composition to achieve superior thermal stability while maintaining manufacturability through established glass processing techniques

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent utilizes color changes by incorporating specific metal oxide colorants into the glass raw materials. Different metal oxides (e.g., copper oxide for red, chromium oxide for green, cobalt oxide for blue) are used to achieve precise color filtration, allowing for high color purity and uniformity through controlled chemical composition

Inventive Principle:

Principle #32Color changes

3Ease of manufacture

If macromolecular photoresist is used, then the substrate can be formed, but lifespan is reduced due to low stability

Engineering Contradiction:

Improvesubstrate formabilityVSAvoidsubstrate lifespan

Core Design Contradiction:

Ease of manufactureVSDuration of action of stationary object

Solution Approach 1:

The patent changes the material parameter from macromolecular photoresist to glass-based materials. The color filter layers are formed by firing glass raw materials mixed with colorants, fundamentally changing the material composition to achieve superior thermal stability while maintaining manufacturability through established glass processing techniques

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent replaces the short-living macromolecular photoresist with durable glass-based color filter layers. Glass materials inherently possess higher thermal and chemical stability, significantly extending the lifespan of the color filter substrate while remaining cost-effective through the use of standard glass processing methods

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

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 results in a color filter substrate with improved uniformity, thermal stability, high transmissivity, and color purity, optimizing display performance and extending the substrate's lifespan.

Implementation Method 1

forming a matrix shaped macromolecular osmosis film which has absorbed carbon powder grains

Methodology Applied

Scientific EffectOsmosis: Osmosis

Implementation Method 2

encapsulating the matrix shaped macromolecular osmosis film which has absorbed carbon powder grains by using a molten glass liquid

Methodology Applied

Scientific EffectMelting: Melting

Implementation Method 3

firing the glass plate, so as to fire the glass raw materials mixed with different colorants into color filter layers in different colors

Methodology Applied

Scientific EffectFiring: Heating

Data Source

PatentUS9042044B2Color filter substrate and method of manufacturing the same

Publication Date: 2015.05.26 BOE TECHNOLOGY GROUP CO LTD

AI summary

Embodiments of the disclosed technology relate to a color filter substrate and a method of manufacturing the same. The color filter substrate comprises a base substrate having a black matrix pattern thereon, the black matrix pattern having a plurality of openings; and a plurality of color filter layers in different colors, disposed on the base substrate and located at the openings of the black matrix pattern, the color filter layers being glass layers in different colors.