Quantum Dot Color Film Substrate for Uniform UV Curing
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Solution Overview
Problem
Existing quantum dot color film layers face issues with uneven curing due to insufficient UV irradiation, leading to suboptimal light-emitting performance in display devices.
Innovation Solution
A color film substrate is designed with a light conversion structure between the black matrix and the quantum dot color film layer, which converts ultraviolet light of a first wavelength into a second wavelength with higher energy, ensuring more uniform UV curing of the quantum dot color film layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional UV irradiation is used to cure the quantum dot color film layer, then the curing process is simplified, but the curing uniformity deteriorates due to insufficient UV irradiation penetration
Solution Approach 1:
A light conversion layer is introduced as an intermediary between the UV light source and the quantum dot color film layer. This layer converts UV light of a first wavelength to UV light of a second wavelength, enabling deeper and more uniform penetration through the color film layer while maintaining the simplicity of the UV curing process
Solution Approach 2:
The wavelength parameter of UV light is changed from a first wavelength to a second wavelength through the light conversion layer. This parameter change allows the UV light to penetrate the quantum dot color film layer more effectively, achieving uniform curing throughout the layer thickness
2Reliability
If the quantum dot color film layer thickness is increased to improve display quality, then the light-emitting performance is enhanced, but the UV curing completeness deteriorates due to insufficient light penetration
Solution Approach 1:
By changing the wavelength parameter of UV light through the light conversion layer, the patent enables effective curing of thicker quantum dot color film layers. The converted UV light has improved penetration capability, ensuring complete curing even as layer thickness increases for better display quality
3Device complexity
If direct UV irradiation is applied to the quantum dot color film layer, then the fabrication process is simplified, but the light-emitting performance deteriorates due to uneven curing
Solution Approach 1:
The light conversion layer serves as a mediator that enables uniform curing without significantly increasing fabrication process complexity. It is integrated into the existing UV curing workflow, converting the light wavelength in situ to achieve complete and uniform curing of the quantum dot color film layer
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 implementation of the light conversion structure within the color film substrate ensures complete curing of the quantum dot color film layer, thereby enhancing the light-emitting performance and uniformity of display devices.
Implementation Method 1
a light conversion structure, located between a side wall of the black matrix in the plurality of openings and a side wall of the quantum dot color film layer, and configured to convert ultraviolet light of a first wavelength into ultraviolet light of a second wavelength
Implementation Method 2
a quantum dot color film layer, located in the pixel openings, and including an ultraviolet curable quantum dot material
Data Source
AI summary
A color film substrate, a fabrication method therefor, and a display device. The color film substrate comprises a base substrate (1); a black matrix (2) is located on one side of the base substrate (1), the black matrix (2) having a plurality of pixel openings (21); a quantum dot color film layer (31, 32, 33) is located in the pixel openings (21) and comprises an ultraviolet light-curable quantum dot material; and a light conversion structure (4), which is located between a side wall of the black matrix (2) and a side wall of the quantum dot color film layer (31, 32, 33). When a quantum dot solution is UV cured, the light conversion structure (4) may convert ultraviolet light of 395 nm into ultraviolet light that has a shorter wavelength and higher energy. Since the light conversion structure (4) is arranged between the side wall of the black matrix (2) and the side wall of the quantum dot color film layer (31, 32, 33), the ultraviolet light that has a shorter wavelength and higher energy may be emitted from a side edge and irradiated to the quantum dot color film layer (31, 32, 33), which solves the problem of uneven UV curing of the quantum dot color film layer (31, 32, 33), thereby improving the light-emitting performance of the display device.