Blue Filter With Nanoparticle Absorption for Gamut Preservation
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Solution Overview
Problem
Existing displays emit high-energy blue light that can cause retinal damage while maintaining a large color gamut, and there is a need to balance blue light emission to protect eyes while preserving color reproduction capabilities.
Innovation Solution
Incorporating a light filtering layer with semi-conductive nanoparticles that absorb wavelengths between 350 nm to λcut (420-450 nm) to limit blue light emission, while maintaining a gamut area greater than 90% of the original display's gamut.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a light filtering layer is added to block high energy blue light, then eye protection is improved, but display gamut is reduced
Solution Approach 1:
The patent applies parameter changes by precisely controlling the optical properties of the light filtering layer, specifically setting absorbance thresholds (greater than 0.25) at critical wavelength ranges (350-420nm or 350-450nm). This selective parameter control blocks harmful blue light while preserving sufficient light transmission to maintain display gamut above 90% of the original, thus resolving the contradiction between eye protection and color reproduction
Solution Approach 2:
The patent employs composite materials by combining the light filtering layer (containing UV absorbers, blue light absorbers, or both) with the display's existing optical layers including polarizers, liquid crystal layers, and protective layers. This composite structure enables simultaneous achievement of blue light filtration and gamut preservation through the synergistic interaction of multiple functional layers
2Area of stationary object
If blue LED wavelength is reduced to maximize gamut, then color reproduction is improved, but harmful blue light emission increases
Solution Approach 1:
The patent applies the extraction principle by removing harmful blue light components (wavelengths below 420-450nm) from the blue LED emission spectrum through the light filtering layer. This allows the display to use blue LEDs with wavelengths that maximize gamut while the filter extracts and blocks the harmful high energy portion, thus resolving the contradiction between gamut maximization and harmful emission reduction
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 effectively filters high-energy blue light, protecting eyes while preserving a color gamut area greater than 90% of the original display's gamut, ensuring both eye protection and color reproduction.
Implementation Method 1
the absorbance through said light filtering layer is greater than 0.25 for each light wavelength ranging from 350 nm to λcut, λcut being in the range from 420 nm to 450 nm
Data Source
AI summary
A display that includes an image producing system and a light filtering layer in the blue range, the light filtering layer having a limited impact on the gamut of the display. The image producing system has a gamut G0 defined in a color space The light filtering layer includes semi-conductive nanoparticles, and the absorbance through the light filtering layer is greater than 0.25 for each light wavelength ranging from 350 nm to λcut, λcut being in the range from 420 nm to 450 nm. The gamut G1 of the image producing system with the filtering layer has an area greater than 90% of the area of gamut G0 in the color space.