Display Color Filter Dyes for Blue Light Reduction
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Solution Overview
Problem
Electronic display devices emit high levels of blue light, which can cause eye strain, vision impairment, and disrupt circadian rhythms, while existing solutions to reduce blue light often compromise display brightness or battery life.
Innovation Solution
Incorporation of selective light-absorbing dyes into color filters that absorb harmful blue and UV light, converting it into less harmful wavelengths, maintaining true white color balance and optical clarity with minimal brightness loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If blue light emission is reduced using conventional methods, then eye safety is improved, but display brightness decreases
Solution Approach 1:
The patent applies selective wavelength filtering by incorporating specific dyes (cyan dye absorbing 480-530nm, yellow dye absorbing 560-580nm) that target only harmful blue light wavelengths while preserving other spectral regions. This localized spectral modification reduces blue light toxicity without uniformly reducing overall display brightness, thereby resolving the contradiction between eye safety and brightness maintenance.
Solution Approach 2:
The patent modifies the optical parameters of the display system by introducing dyes with specific absorption characteristics. The cyan dye (absorbing 480-530nm) and yellow dye (absorbing 560-580nm) change the spectral composition parameters, selectively removing harmful blue wavelengths while maintaining overall luminance through compensation in other spectral regions, thus reducing blue light toxicity without sacrificing display brightness.
2Object-affected harmful factors
If blue light emission is reduced using conventional methods, then eye safety is improved, but power consumption increases
Solution Approach 1:
The patent converts the harmful blue light emission into a beneficial filtering mechanism by using cyan and yellow dyes that absorb harmful wavelengths. Instead of simply blocking blue light and losing energy, the system uses the absorption特性 of these dyes to selectively remove harmful radiation while maintaining overall display efficiency, thereby reducing blue light toxicity without increasing power consumption.
3Object-affected harmful factors
If color filters are enhanced with light-absorbing materials, then blue light reduction is improved, but color accuracy may deteriorate
Solution Approach 1:
The patent applies selective wavelength filtering by incorporating specific dyes (cyan dye absorbing 480-530nm, yellow dye absorbing 560-580nm) that target only harmful blue light wavelengths while preserving other spectral regions. This localized spectral modification reduces blue light toxicity without uniformly reducing overall display brightness, thereby resolving the contradiction between eye safety and brightness maintenance.
Solution Approach 2:
The patent uses a composite filtering approach combining cyan dye and yellow dye in the color filter layer. This composite material strategy allows the cyan dye to absorb harmful blue wavelengths (480-530nm) while the yellow dye absorbs in the 560-580nm range, creating a synergistic effect that maintains color accuracy across the visible spectrum while selectively reducing blue light toxicity.
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
Reduces blue light toxicity by up to 20% and maintains display brightness and color gamut with minimal luminance loss, improving eye safety and reducing adverse health effects.
Implementation Method 1
Incorporating specific dyes or light-absorbing materials into the color filters of display systems that selectively absorb harmful blue and ultraviolet light
Implementation Method 2
converting or recycling it into less harmful wavelengths
Data Source
AI summary
A display system comprising a backlight device having a light emitting array, a liquid crystal panel, and a color filter having one or more absorbing dyes and, optionally, one or more dye enhancement compounds, wherein the one or more absorbing dyes and the one or more dye enhancement compounds are located in at least one color set of subpixels in the color filter. The one or more absorbing dyes may be a soluble, blue light, green light, or red light absorbing dye included in blue, green, or red subpixels of the color filter. A blue light absorbing dye may reduce transmission in a wavelength range of 410-430 nm, a green light absorbing dye may reduce transmission in a wavelength range of 490-570 nm, and a red light absorbing dye may reduce transmission of wavelengths less than 620 nm.