Black Matrix Light Blocking via Destructive Interference
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing black matrices in display devices suffer from high cost, environmental pollution, and inadequate light blocking properties, leading to issues with reflectivity and adhesiveness, particularly as screen sizes increase and brightness requirements escalate.
Innovation Solution
A display device with a black matrix that satisfies specific extinction coefficient and thickness conditions, utilizing metal oxides, nitrides, or oxynitrides, to achieve effective light reflection control through destructive interference, thereby enhancing light blocking performance and simplifying the patterning process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If chrome is deposited on the glass substrate to form a black matrix, then light blocking property is improved, but cost increases and environmental pollution occurs
Solution Approach 1:
The patent replaces expensive and environmentally harmful chrome materials with organic dyes that are cheaper and easier to dispose of. The organic dye-based black matrix achieves sufficient light blocking properties without the environmental pollution and high cost associated with chrome deposition processes.
Solution Approach 2:
The patent changes the material composition parameter from inorganic chrome to organic dye, and optimizes the thickness parameter of the black matrix to achieve effective light blocking. By controlling the thickness and selecting appropriate organic dyes, the patent achieves high light blocking performance without the harmful effects of chrome.
2Ease of manufacture
If coloring pigment other than carbon black is used, then ease of manufacture is improved, but light blocking property deteriorates
Solution Approach 1:
The patent optimizes the thickness parameter of the black matrix to compensate for the lower light blocking efficiency of organic dyes compared to carbon black. By increasing the thickness within practical limits and selecting dyes with high absorption coefficients, the patent achieves sufficient light blocking while maintaining the ease of manufacture provided by organic dye patterning.
Solution Approach 2:
The patent uses composite structures combining organic dye layers with appropriate thickness optimization to achieve both ease of manufacture and adequate light blocking properties. The organic dye-based black matrix is formed through simplified patterning processes while maintaining effective light blocking through controlled layer thickness.
3Area of stationary object
If screen size is increased, then display area is improved, but light blocking property of black matrix deteriorates
Solution Approach 1:
The patent optimizes the thickness parameter of the black matrix to enhance light blocking performance in larger display screens. By controlling the thickness within the range of 50-200 nm and selecting organic dyes with high absorption coefficients, the patent achieves effective light blocking across larger screen areas without compromising the other benefits of organic dye-based black matrices.
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 significantly reduces light reflectance in non-pixel areas, improving image quality and visibility by controlling light reflectance through the black matrix, while also simplifying the manufacturing process and ensuring reliability.
Implementation Method 1
utilizing metal oxides, nitrides, or oxynitrides, to achieve effective light reflection control through destructive interference
Implementation Method 2
the black matrix satisfies a value of 0.004 or more and 0.22 or less of Equation 1 below... significantly reduces light reflectance in non-pixel areas
Data Source
AI summary
The present invention relates to a display device.