Optical Filter Dye Composition for Blue Light Blocking and White Balance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing blue light filtering technologies compromise display quality by adjusting primary colors to compensate for color gamut coverage, requiring extensive adjustment tests and experiments, and fail to meet stringent blue light toxicity reduction standards.
Innovation Solution
An optical filter comprising multiple light-absorbing dyes that directly absorb orange-red light in the 580-630 nm range and optionally green light in the 500-580 nm range to compensate for color temperature, eliminating the need for complex color adjustment experiments and achieving high blue light hazard blocking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conventional absorption-type anti-blue light protective films use blue light absorbing particles to absorb harmful blue light, then blue light blocking is achieved, but color temperature decreases making the display appear yellowish
Solution Approach 1:
The patent changes the approach from absorbing blue light (which lowers color temperature) to absorbing orange-red light (which raises color temperature). By selecting dye compounds with absorption peaks in the orange-red region (580-630 nm), the invention compensates for the color temperature reduction caused by blue light absorption, thereby maintaining natural display colors while still blocking harmful blue light.
Solution Approach 2:
The invention uses composite dye formulations combining multiple dye compounds (e.g., CI Direct Red 28, CI Direct Red 80, CI Direct Yellow 86) with specific absorption characteristics. This composite approach allows simultaneous achievement of high blue light blocking and color temperature compensation, resolving the contradiction between blue light protection and display color accuracy.
2Temperature
If dyes are added to compensate for color temperature in non-blue light regions, then color temperature is maintained, but brightness is reduced affecting overall display quality
Solution Approach 1:
The patent applies local quality by targeting specific wavelength regions for absorption. Instead of using broad-spectrum dyes that reduce overall brightness, the invention selects dyes with absorption peaks specifically in the orange-red region (580-630 nm). This localized absorption approach compensates for color temperature while minimizing impact on overall brightness and display quality.
3Manufacturing precision
If extensive adjustment tests and experiments are conducted to adjust primary colors for color gamut coverage, then color accuracy is improved, but manufacturing complexity and time increase
Solution Approach 1:
The patent implements preliminary action by pre-selecting and formulating dye compounds with specific absorption characteristics before the manufacturing process. The dye formulations are designed in advance to provide both blue light blocking and color temperature compensation, eliminating the need for extensive post-manufacturing adjustment tests and experiments for color gamut optimization.
4Object-affected harmful factors
If higher levels of blue light blocking are achieved (up to 80%), then blue light toxicity reduction is improved, but color temperature shift and brightness loss increase
Solution Approach 1:
The patent changes the fundamental parameter of absorption target from blue light wavelength to orange-red light wavelength. This parameter change allows achieving high blue light blocking (up to 80%) while simultaneously compensating for color temperature shift, as the orange-red light absorption counteracts the cooling effect of blue light removal without causing significant brightness loss.
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 maintains screen display quality, achieves high blue light absorption, and meets stringent blue light toxicity reduction standards without significant color temperature alteration, ensuring a white balance effect closest to true colors.
Implementation Method 1
The first light-absorbing dye absorbs at least 50% of blue light in a wavelength range from 435 nm to 440 nm
Implementation Method 2
The second light-absorbing dye absorbs at least 40% of orange-red light in a wavelength range from 580 nm to 630 nm
Data Source
AI summary
An optical filter and associated protector are provided for reducing blue light toxicity without affecting display quality. The optical filter includes a light-absorbing layer formed on a transparent substrate. The light-absorbing layer comprises multiple dyes including a first light-absorbing dye that absorbs at least 50% blue light in a wavelength range from 435 nm to 440 nm, and a second light-absorbing dye that absorbs at least 40% orange-red light in a wavelength range from 580 nm to 630 nm with a center wavelength between 590 nm and 610 nm. A third light-absorbing dye may optionally be included to absorb at least 10% green light in a wavelength range from 500 nm to 580 nm. This configuration enables effective blue light hazard reduction while directly compensating color temperature without the need for complex color adjustment experiments, maintaining display quality with minimal color distortion.