Display Substrate Interference Layer for Blue Light Filtering
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Solution Overview
Problem
Existing display substrates face challenges in achieving high color gamut and brightness due to the need for additional color filters to prevent excitation of fluorescent films by external blue light, which also reduces light efficiency.
Innovation Solution
A medium film laminated layer with alternating layers of different refractive indices is used to eliminate blue light in a specific wavelength range, preventing excitation of fluorescent films and reducing the need for color filters, while maintaining high color gamut and brightness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If additional color filters are used to prevent excitation of fluorescent films by external blue light, then color purity is improved, but light efficiency deteriorates
Solution Approach 1:
The patent extracts and removes the harmful blue light component (wavelength range 420-480nm) from external light before it reaches the fluorescent film, eliminating the need for additional color filters that would otherwise be required to maintain color purity, thus preserving light efficiency
Solution Approach 2:
The patent introduces an intermediate layer (blue light eliminating layer) between the external light source and the fluorescent film to selectively eliminate harmful blue light while allowing other wavelengths to pass through, achieving color purity without sacrificing overall light efficiency
2Object-affected harmful factors
If additional color filters are used to eliminate blue light, then harmful effects are reduced, but device complexity increases
Solution Approach 1:
The patent merges the blue light elimination function with the existing encapsulation or protective layer structure of the display device, integrating multiple functions into a single layer rather than adding separate components, thus reducing device complexity while still eliminating harmful blue light
Solution Approach 2:
The blue light eliminating layer is designed to serve multiple functions: it eliminates harmful blue light, protects the fluorescent film from excitation, and maintains optical transparency for other wavelengths, replacing what would otherwise require multiple separate components
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 out blue light that excites fluorescent films, enhancing color gamut and brightness without the need for additional color filters, thus improving display performance and reducing production costs.
Implementation Method 1
A medium film laminated layer with alternating layers of different refractive indices is used to eliminate blue light in a specific wavelength range
Implementation Method 2
The phosphor layer absorbs excitation light and emits fluorescence
Data Source
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Figure 3a~3b
Figure 4a~4b
AI summary
A display substrate, a manufacture method thereof and a display panel are provided. The display substrate includes: a first substrate (110); a plurality of pixel units included in the first substrate (110), each of the pixel units at least including a first sub-pixel unit, a second sub-pixel unit and a third sub-pixel unit; a medium film laminated layer (100) arranged on the first substrate (110), the medium film laminated layer at least covering the first sub-pixel unit and the second sub-pixel unit; the medium film laminated layer (100) is configured to eliminate blue light in a first wavelength range passing the medium film laminated layer (100), the medium film laminated layer (100) includes at least one first medium film layer (101) and at least one second medium film layer (102) which are laminated alternately, and a refractive index of the first medium film layer (101) is greater than a refractive index of the second medium film layer (102). By alternately arranging film layers of different refractive indices in the medium film laminated layer (100), blue light having or close to a first center wavelength range can be eliminated or weakened by interfering incident light, thereby eliminating or weakening the blue light passing the medium film laminated layer (100).