Molybdenum Black Matrix for Liquid Crystal Displays
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Solution Overview
Problem
Conventional liquid crystal displays using chromium or organic materials for the black matrix suffer from environmental pollution and poor quality due to the thick black matrix, which hinders the flow of liquid crystal molecules.
Innovation Solution
A liquid crystal display with a black matrix layer made of molybdenum, coated with a transparent conductive film, and supported by a photo spacer, allowing for a thinner black matrix thickness of 100 to 1000 angstroms, enhancing the display's quality and environmental friendliness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If chromium or organic material is used for the black matrix, then the black matrix can be formed with sufficient thickness, but it causes environmental pollution and hinders liquid crystal molecule flow
Solution Approach 1:
The patent changes the material parameter from chromium/organic material to molybdenum, and changes the thickness parameter from 1 micrometer to 100-1000 angstroms. This dual parameter change resolves the contradiction by providing a material that is both environmentally friendly and sufficiently thin to allow liquid crystal molecule flow while maintaining black matrix functionality.
Solution Approach 2:
The patent creates a composite structure by coating the molybdenum black matrix layer with a transparent conductive film. This composite material approach allows the molybdenum to provide the environmental benefits and appropriate thickness, while the transparent conductive film coating maintains electrical properties and display quality.
2Stability of the object's composition
If the black matrix thickness is increased to 1 micrometer, then the black matrix structure is stable, but liquid crystal molecules cannot flow properly
Solution Approach 1:
The patent dramatically reduces the thickness parameter from 1 micrometer to 100-1000 angstroms (0.01-0.1 micrometer). This parameter change maintains structural stability through the molybdenum material properties and transparent conductive film coating, while enabling liquid crystal molecule flow through the reduced thickness.
3Ease of manufacture
If chromium is used for the black matrix, then the black matrix can be formed easily, but it causes heavy metal pollution
Solution Approach 1:
The patent changes the material parameter from chromium to molybdenum. Molybdenum can be deposited using similar sputtering or chemical vapor deposition techniques, maintaining ease of manufacture, while eliminating the heavy metal pollution problem associated with chromium.
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 use of molybdenum for the black matrix reduces environmental pollution and facilitates the spreading of liquid crystal molecules, improving the display's quality by reducing the matrix thickness and enabling better alignment solutions.
Implementation Method 1
a material that makes the black matrix layer being molybdenum, the black matrixes having a thickness of 100 angstroms to 1000 angstroms
Data Source
AI summary
A liquid crystal display includes a first substrate, which includes a first surface and a second surface opposite to the first surface, the first surface of the first substrate including a TFT array and a color filter layer formed thereon, the color filter layer including a plurality of color filter units arranged in an array and gaps formed between adjacent color filter units; and a second substrate, which includes a third surface and a fourth surface opposite to the third surface, the third surface and the first surface facing each other, the third surface including a black matrix layer formed thereon and including a plurality of black matrixes respectively corresponding to the gaps between the plurality of color filter units, the black matrix layer including a layer of a transparent conductive film coated thereon. The material of the black matrix layer is molybdenum.