Optical Purification Layer for Edge-Lit Backlight Color Gamut
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Solution Overview
Problem
Current liquid crystal displays struggle to achieve the DCI-P3 color gamut due to limitations in light conversion efficiency and the presence of heavy metals in quantum dots, making it difficult to reach 99% color specification with ordinary LED backlights.
Innovation Solution
An optical purification layer using a phthalocyanine-based dye is introduced to absorb cyan and yellow-orange light, which is integrated into an edge-lit backlight module and polarizer, enhancing color gamut to 90%-99% of the DCI-P3 specification by purifying light.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If quantum dots are used to achieve DCI-P3 color gamut, then color performance is improved, but heavy metals and cost increase
Solution Approach 1:
The patent extracts and removes the harmful quantum dot material from the backlight system, replacing it with an optical purification layer that uses organic dyes to achieve the same color gamut enhancement without heavy metals. This directly applies the extraction principle by taking out the problematic component while maintaining the desired function.
Solution Approach 2:
The patent employs inexpensive organic dyes and conventional materials in the optical purification layer instead of expensive quantum dots. These materials are readily available, cost-effective, and can be easily replaced if needed, embodying the principle of using cheap, short-living objects to achieve the same technical effect.
2Manufacturing precision
If quantum dots are used to achieve DCI-P3 color gamut, then color performance is improved, but cost increases
Solution Approach 1:
The patent substitutes expensive quantum dots with inexpensive organic dyes and conventional optical materials. The optical purification layer uses readily available materials that significantly reduce manufacturing costs while achieving the same DCI-P3 color gamut performance.
Solution Approach 2:
The patent creates a functional copy of the quantum dot color conversion effect using organic dyes in the optical purification layer. Instead of using the original expensive quantum dot mechanism, it replicates the desired optical outcome through a different, more economical material system.
3Ease of manufacture
If ordinary LED backlights are used, then cost is reduced, but color gamut cannot reach DCI-P3 specification
Solution Approach 1:
The patent introduces an optical purification layer as an intermediary component between the LED backlight and the display panel. This intermediate layer uses organic dyes to selectively absorb unwanted wavelengths and enhance color purity, enabling ordinary LED backlights to achieve DCI-P3 color gamut performance.
Solution Approach 2:
The optical purification layer employs composite materials including organic dyes dispersed in a polymer matrix, combined with conventional optical films. This composite structure achieves superior color gamut performance by combining the light-absorbing properties of organic dyes with the optical enhancement capabilities of traditional display films.
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 allows for the realization of a wide color gamut in liquid crystal displays, achieving 90%-99% of the DCI-P3 color gamut while maintaining high thermal stability and low costs, enabling the display of ultimate colors.
Implementation Method 1
an organic absorbing dye for absorbing cyan light and yellow orange light of wavelengths ranging from 560 nm to 610 nm
Data Source
AI summary
The present invention provides an optical purification layer, an edge-lit backlight module, and a polarizer. The material of the optical purification layer includes an organic absorbing dye for absorbing cyan light and yellow orange light having a wavelength range of 560-610 nm. The edge-lit backlight module includes a back plate, a reflector, a light guide plate, an edge light source, and an optical film module stacked, wherein the optical purification layer is provided between the edge light source and the light guide plate, or the optical purification layer is further provided between the light guide plate and the diffuse reflection layer, or the light guide plate includes a material of the optical purification layer.