Neutral Density Display Filter for UV and Blue Light Blocking
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Solution Overview
Problem
Current film substrates for electronic devices lack adequate protection against harmful light emissions, particularly in the UV and high-energy visible light ranges, while maintaining transparency and color integrity, and often fail to provide mechanical robustness and heat resistance.
Innovation Solution
A neutral density filter comprising an organic dye and a polymer substrate, such as polycarbonate, PVC, epoxy, polyester, polyethylene, or polyamide, is used to block specific wavelength ranges of harmful light without altering color integrity, incorporating features like UV protection and mechanical robustness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If optical filters are used to block harmful UV and blue light, then eye protection is improved, but color integrity and transparency deteriorate
Solution Approach 1:
The patent applies parameter changes by using a polymer substrate with controlled thickness (0.002 to 0.05 inches) and incorporating specific absorbing compounds at optimized concentrations (0.01% to 5% by weight). These parameter adjustments allow the filter to achieve effective UV and blue light blocking while maintaining adequate visible light transmission and color integrity, resolving the contradiction between protection and transparency.
Solution Approach 2:
The patent employs composite materials by combining a polymer substrate (such as polycarbonate, acrylic, or glass) with light-absorbing compounds (including UV absorbers and blue light absorbers). This composite structure enables simultaneous achievement of UV protection, blue light reduction, and maintained color accuracy, as each material component contributes specific functional properties that work together to resolve the contradiction.
2Object-affected harmful factors
If absorbing compounds are added to polymer substrates to block harmful light, then UV and blue light protection is improved, but mechanical robustness and heat resistance deteriorate
Solution Approach 1:
The patent applies parameter changes by selecting polymer substrates with inherently high mechanical strength and heat resistance properties (such as polycarbonate with tensile strength exceeding 8,000 psi and heat deflection temperature above 150°C). The absorbing compounds are incorporated at optimized concentrations that provide effective UV and blue light blocking without compromising the mechanical integrity or thermal stability of the polymer matrix, thus resolving the contradiction between optical protection and mechanical robustness.
Solution Approach 2:
The patent uses composite materials where the polymer substrate provides mechanical robustness and heat resistance, while the absorbing compounds provide UV and blue light protection. The composite structure is designed so that the polymer matrix maintains its mechanical properties even in the presence of absorbing compounds, ensuring that both protection functions and mechanical strength are achieved simultaneously.
3Illumination intensity
If existing film substrates are used to maintain transparency, then color accuracy is preserved, but protection against harmful light emissions is insufficient
Solution Approach 1:
The patent employs composite materials by combining a transparent polymer substrate with specific light-absorbing compounds. The polymer substrate (such as polycarbonate or acrylic) maintains high transparency and color accuracy, while the absorbing compounds (including UV absorbers and blue light absorbers) provide protection against harmful light emissions. This composite approach resolves the contradiction by having each material component fulfill its specific function without compromising the other.
Solution Approach 2:
The patent applies local quality by selectively absorbing specific wavelength ranges (UV and blue light) while allowing other visible wavelengths to pass through. The absorbing compounds are positioned and concentrated in a way that targets harmful wavelengths specifically, leaving the beneficial visible light transmission and color accuracy intact. This selective absorption approach resolves the contradiction between protection and transparency.
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 filter effectively reduces harmful light emissions, maintains transparency and color accuracy, and provides enhanced mechanical durability and heat resistance, ensuring user safety and device protection.
Implementation Method 1
an absorbing compound or compounds that can be combined with one or more polymer substrates to be placed on or incorporated into an electronic device
Implementation Method 2
A neutral density filter comprising an organic dye and a polymer substrate, such as polycarbonate, PVC, epoxy, polyester, polyethylene, or polyamide, is used to block specific wavelength ranges of harmful light
Data Source
AI summary
A light-absorbing, neutral density filter for an electronic device display having a capacity grid layer. More specifically, a light-absorbing, neutral density filter applied as a protective film or protective layer to an electronic device display or incorporated into or onto the screen layers of a device that can block ultraviolet light, high energy visible light, a portion of blue light, and/or other light in the visible spectrum. The neutral density filter comprises a polymer substrate and an absorbing agent.