Color Conversion Substrate with Blue Light Reflective Layer
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Solution Overview
Problem
Existing display devices face challenges in improving display quality, particularly in achieving efficient color conversion and light management for enhanced viewing experiences.
Innovation Solution
A color conversion substrate is designed with a base part having defined light-transmitting areas, stacked layers with different refractive indices, and wavelength conversion patterns to convert light colors effectively, along with a blue light reflective layer and color filters to manage light transmission and reflection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a color conversion pattern is arranged on the optical path from a light source to a viewer to allow each pixel to display one primary color, then display quality is improved, but device complexity increases due to additional layers and structures
Solution Approach 1:
The patent combines multiple functions into integrated structures: the color conversion pattern serves both as a wavelength converter and a display element, while the reflective layer serves both as a light management component and a structural element. This merging reduces the number of separate components needed, thereby improving display quality without proportionally increasing device complexity.
Solution Approach 2:
The reflective layer is designed to perform multiple functions: it reflects blue light to enhance luminance, serves as a structural support for the color conversion pattern, and contributes to the overall light management system. This multi-functionality allows the device to achieve better display quality without adding proportional complexity.
2Illumination intensity
If multiple stacked layers with different refractive indices are used to improve light management, then luminance and contrast are enhanced, but manufacturing precision requirements increase
Solution Approach 1:
The patent applies different refractive index materials in specific local regions of the stacked structure, optimizing light management at each interface where it is most needed. This localized approach to quality enhancement allows for improved luminance and contrast while reducing the overall manufacturing precision requirements compared to uniform high-precision structures.
Solution Approach 2:
The use of composite material stacks with carefully selected refractive indices creates optical pathways that enhance luminance and contrast through controlled light reflection and transmission. The composite structure leverages the complementary properties of different materials to achieve superior optical performance without requiring extreme manufacturing precision.
3Illumination intensity
If wavelength conversion patterns are added to convert light colors, then color accuracy is improved, but power consumption increases due to additional light conversion processes
Solution Approach 1:
The patent converts the potentially harmful effect of energy loss in wavelength conversion by using highly efficient photoluminescent materials with minimal Stokes shift. The wavelength conversion process is designed to minimize energy loss as heat, thereby improving color accuracy while keeping power consumption increases to a minimum.
Solution Approach 2:
The patent optimizes the optical parameters of the wavelength conversion pattern, including particle size, shape, and material composition, to maximize conversion efficiency. By carefully controlling these parameters, the system achieves high color accuracy with minimal energy loss, thereby reducing the impact on power consumption.
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 enhances display quality by improving light management and color conversion, leading to better luminance, contrast, and viewing angles, while also reducing power consumption and increasing the lifespan of the display device.
Implementation Method 1
a first wavelength conversion pattern overlapping the second light-transmitting area, and disposed on the second stack, where the first wavelength conversion pattern converts light of a first color into light of a second color
Implementation Method 2
the portions of the first stack and the second stack in the second light-transmitting area are in direct contact with each other to constitute a blue light reflective layer
Implementation Method 3
the first stack may include a first layer and a second layer having different refractive indices from each other, and the second stack may include a third layer and a fourth layer having different refractive indices from each other
Data Source
AI summary
A color conversion substrate includes: a base part in which a first light-transmitting area and a second light-transmitting area are defined; a first stack disposed on the base part and a second stack disposed on the first stack; a first wavelength conversion pattern overlapping the second light-transmitting area, and disposed on the second stack, where the first wavelength conversion pattern converts light of a first color into light of a second color; and a light-transmitting pattern overlapping the first light-transmitting area and disposed between the first stack and the second stack, where portions of the first stack and the second stack in the second light-transmitting area are in direct contact with each other to constitute a blue light reflective layer.