Wavelength Conversion Unit Textured Filter Layer for Lower-Cost QD Films
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Solution Overview
Problem
The high production cost of quantum dot films used in wavelength conversion units for LED-based display devices is a significant challenge, impacting the efficiency and cost-effectiveness of these devices.
Innovation Solution
A wavelength conversion unit arrangement is developed, comprising a carrier with a first wavelength conversion layer and a filter layer, where the filter layer has different textures on its surfaces, reducing manufacturing costs and process time by optimizing the manufacturing process of quantum dot films and their integration into LED-based display devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If quantum dot film is used to convert blue light into red light or green light, then color gamut performance is improved, but production cost increases
Solution Approach 1:
The patent segments the quantum dot film manufacturing process by using separate molds for different color regions (red, green, blue) within a single film structure. This allows selective application of quantum dots in different regions, optimizing color gamut performance while reducing overall material and manufacturing costs compared to uniform quantum dot coverage.
Solution Approach 2:
The patent applies different textures to different surfaces of the quantum dot film - a first texture on the first surface and a second texture on the second surface. This local differentiation optimizes light extraction efficiency from the LED while maintaining cost-effectiveness, as each surface is optimized for its specific function rather than using a uniform structure throughout.
2Illumination intensity
If quantum dot film is used for wavelength conversion, then color conversion performance is improved, but manufacturing process time increases
Solution Approach 1:
The patent combines multiple functions into a single quantum dot film structure - wavelength conversion, light extraction enhancement through textures, and regional color optimization all in one component. This integration reduces the number of separate manufacturing steps and assembly operations, thereby reducing manufacturing process time while maintaining color conversion performance.
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 reduces the manufacturing costs and process time for wavelength conversion units, enhancing the efficiency and cost-effectiveness of quantum dot films in LED-based display devices while maintaining their color conversion performance.
Implementation Method 1
A quantum dot film can be used to improve the color gamut performance of the display device. For example, the quantum dot film can be used to convert blue light generated from the LED into red light or green light.
Data Source
AI summary
A wavelength conversion unit arrangement includes a carrier and a wavelength conversion unit. The wavelength conversion unit includes a wavelength conversion layer and a filter layer, and the filter layer attaches the wavelength conversion unit to the carrier. The filter layer has a first surface facing the carrier and a second surface opposite the first surface, and the first surface and the second surface have different textures.