Color Conversion Media Light Leakage Prevention
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Solution Overview
Problem
In color conversion media for electroluminescent displays, the thickness variations of color conversion layers lead to light scattering and leakage, causing deterioration and affecting the color conversion function and rendering properties.
Innovation Solution
The formation of color conversion layers in reduced thickness, combined with a reduced thickness light shielding layer, and the strategic placement of color filter layers on a transparent substrate, prevent light reflection and improve color rendering by controlling light leakage between adjacent layers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the thickness of color conversion layers is increased to improve color conversion function, then light scattering and leakage occur, causing deterioration of adjacent layers
Solution Approach 1:
A light shielding layer is introduced as an intermediary component between adjacent color conversion layers. This layer prevents light scattered from one color conversion layer from reaching adjacent layers, thereby eliminating the harmful effect of light leakage while allowing the color conversion layers to maintain their necessary thickness for effective color conversion.
Solution Approach 2:
The structure is segmented by introducing a light shielding layer that divides the space between color conversion layers. This segmentation isolates each color conversion layer's light path, preventing cross-contamination of light between adjacent layers and resolving the light scattering issue.
2Object-affected harmful factors
If polishing is applied to color conversion layers to prevent light leakage, then production complexity increases
Solution Approach 1:
Instead of modifying the color conversion layers through polishing, a light shielding layer is introduced as a mediator that passively prevents light leakage. This approach avoids complex surface treatment processes while achieving the same functional result of preventing light contamination between layers.
Solution Approach 2:
The problem of light leakage is solved by extracting the light shielding function into a separate, dedicated layer rather than attempting to solve it through surface modification of the color conversion layers themselves. This separation of functions simplifies the overall production process.
3Object-affected harmful factors
If the light shielding layer thickness is increased to prevent light leakage, then the width of the light shielding layer must be increased
Solution Approach 1:
The thickness of the light shielding layer is optimized to a specific range (50-200 nm) that provides sufficient light blocking capability without requiring excessive width. By adjusting the thickness parameter within this optimized range, the layer achieves effective light leakage prevention while maintaining a compact area footprint.
4Object-affected harmful factors
If color filter layers are added to prevent light leakage, then production efficiency decreases
Solution Approach 1:
The light shielding layer serves as an intermediary that prevents light leakage without requiring additional color filter layers. This single-layer solution achieves the light isolation function more efficiently than multiple color filter layers would, thereby maintaining higher production efficiency.
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
This approach enhances the production efficiency of color conversion members, maintains the color conversion function, and improves color rendering properties by reducing light scattering and leakage, thereby increasing the brightness and efficiency of the display.
Implementation Method 1
a first color conversion layer for converting incident blue light to outgoing green light, a second color conversion layer for converting the incident blue light to outgoing red light
Implementation Method 2
other measures should be taken for overcoming the latter problem, that is, the deterioration due to the leaked excitation light or the like
Data Source
AI summary
Disclosed is a color conversion member which is improved in the prevention of a deterioration in color conversion function, the prevention of reflection of external light, and color rendering properties. The color conversion member comprises a transparent substrate, two or more types of color conversion layers, and a color filter layer. The color conversion layers function to convert incident lights for respective pixels to outgoing lights of colors different from the incident lights. The two or more types of color conversion layers are arranged on said transparent substrate. The color filter layer is provided on the transparent substrate side of any one of the color conversion layers or between the above any one of the color conversion layers and the color conversion layers adjacent to the above any one the color conversion layers.