Color Conversion Film Interlayer Mixing Layer Adhesion
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing color conversion films for liquid crystal display devices have inadequate adhesiveness between the layers, which affects the overall performance and reliability of the backlight unit.
Innovation Solution
A color conversion film is designed with a specific structure that includes a support, a first color conversion layer emitting light in the 500-580 nm range, a second color conversion layer emitting light in the 580-750 nm range, and an interlayer mixing layer between them, with a thickness of 0.1 µm to 2.0 µm, to enhance interlayer adhesiveness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If heating lamination is used to bond the first color conversion layer and the second color conversion layer, then the layers can be joined together, but the adhesiveness between the layers is insufficient
Solution Approach 1:
The patent introduces a third layer (interlayer mixing layer) composed of a different resin material positioned between the first and second color conversion layers. This intermediary layer acts as a bonding mediator, with its resin selected to have compatible chemical or physical bonding characteristics with both adjacent layers, thereby achieving sufficient adhesiveness that cannot be obtained by direct heating lamination alone.
Solution Approach 2:
The patent employs a composite structure where the first color conversion layer, second color conversion layer, and interlayer mixing layer are made of different resin materials. This composite material approach allows each layer to contribute its specific bonding characteristics, creating a multi-material system with superior overall adhesion compared to single-material lamination.
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 proposed structure significantly improves the adhesiveness between the layers, leading to a more reliable and efficient color conversion process in liquid crystal display devices.
Implementation Method 1
a first color conversion layer containing an organic light-emitting material which emits, by an excitation light having a wavelength of 400 nm or more and less than 500 nm, light observed in a region having a peak wavelength of 500 nm or more and less than 580 nm
Implementation Method 2
a second color conversion layer containing an organic light-emitting material which emits, by at least one of the excitation light having a wavelength of 400 nm or more and less than 500 nm or the light emitted from the organic light-emitting material, light observed in a region having a peak wavelength of 580 nm or more and less than 750 nm
Data Source
AI summary
A color conversion film including a support, a first color conversion layer containing an organic light-emitting material which emits, by an excitation light having a wavelength of 400 nm or more and less than 500 nm, light observed in a region having a peak wavelength of 500 nm or more and less than 580 nm, a second color conversion layer containing an organic light-emitting material which emits, by at least one of the excitation light having a wavelength of 400 nm or more and less than 500 nm or the light emitted from the organic light-emitting material, light observed in a region having a peak wavelength of 580 nm or more and less than 750 nm, and an interlayer mixing layer between the first color conversion layer and the second color conversion layer, in which the first color conversion layer and the second color conversion layer are mixed together.