Color Conversion Film Brightness via Layer Segmentation
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Solution Overview
Problem
The challenge is to enhance the brightness of LCD-TV display screens while avoiding the detrimental effects of metal oxides on organic fluorescent materials, as they can act as photocatalysts and degrade optical characteristics.
Innovation Solution
A color conversion film is developed with a substrate, a color conversion layer containing organic fluorescent material, and a pressure-sensitive adhesive layer with dispersed light diffusion particles, such as metal oxides, which are not directly mixed with the organic fluorescent material, thereby maintaining its integrity and enhancing brightness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If metal oxide light diffusion particles are dispersed in the color conversion layer containing organic fluorescent material, then brightness enhancement is achieved, but the optical characteristics of the organic fluorescent material are degraded due to photocatalytic action
Solution Approach 1:
The patent divides the film structure into separate layers: a color conversion layer containing organic fluorescent material and a pressure-sensitive adhesive layer containing metal oxide light diffusion particles. This segmentation prevents direct contact between the metal oxide and organic fluorescent material, eliminating photocatalytic degradation while maintaining brightness enhancement functionality.
Solution Approach 2:
The pressure-sensitive adhesive layer acts as an intermediary barrier between the metal oxide light diffusion particles and the organic fluorescent material. This intermediate layer allows light to pass through while preventing direct interaction between the potentially harmful metal oxide and the organic material, thus protecting optical characteristics while enabling brightness enhancement.
2Productivity
If metal oxide is used for light diffusion in an organic fluorescent film, then light diffusion performance is improved, but the organic fluorescent material is affected due to photocatalytic action under specific conditions
Solution Approach 1:
The patent separates the film into distinct functional layers: the color conversion layer with organic fluorescent material and the pressure-sensitive adhesive layer with metal oxide particles. This physical separation eliminates the harmful photocatalytic interaction between metal oxide and organic material while preserving the light diffusion performance of the metal oxide particles.
Solution Approach 2:
The pressure-sensitive adhesive layer serves as a protective intermediary that allows light to transmit through while preventing direct contact between metal oxide particles and organic fluorescent material. This intermediary structure enables the metal oxide to perform light diffusion without exerting harmful photocatalytic effects on the organic material.
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 solution effectively increases the brightness of the display screen by using light diffusion particles in the adhesive layer, preventing direct interaction with the organic fluorescent material and ensuring durability and optimal optical characteristics.
Implementation Method 1
a pressure-sensitive adhesive or adhesive layer provided on the color conversion layer, in which the color conversion layer includes an organic fluorescent material dispersed therein and the pressure-sensitive adhesive or adhesive layer includes light diffusion particles dispersed therein
Implementation Method 2
the color conversion layer includes an organic fluorescent material dispersed therein
Data Source
AI summary
The invention described in the present specification relates to a color conversion film including: a substrate; a color conversion layer provided on the substrate; and a pressure-sensitive adhesive or adhesive layer provided on the color conversion layer, in which the color conversion layer includes an organic fluorescent material dispersed therein and the pressure-sensitive adhesive or adhesive layer includes light diffusion particles dispersed therein, a backlight unit including the same, and a display device including the same.