Light Source Module Using Uniform Quantum Dots for Cost Reduction
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Solution Overview
Problem
Existing light source modules for portable electronic devices face challenges in enhancing color brightness and saturation while maintaining production costs, as they require quantum dots with multiple particle diameters for wide absorption spectrums.
Innovation Solution
A light source module design that includes a light guide element, a light-emitting element, and a quantum dot element, where the quantum dot element only converts a portion of the first color light into a specific monochromatic light, such as red light, which is then mixed with blue and green light to produce white light, using quantum dots of uniform particle diameter to reduce production costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If quantum dots with multiple particle diameters are used for wide absorption spectrums, then color brightness and saturation are enhanced, but production costs increase
Solution Approach 1:
The patent divides the light conversion function into two parts: a first quantum dot layer with first particle diameters converts first color light to first monochromatic light, while a second quantum dot layer with second particle diameters converts second color light to second monochromatic light. This segmentation allows each layer to use quantum dots of uniform particle diameter, reducing production costs while maintaining color performance
Solution Approach 2:
The patent applies different quantum dot particle diameters to different regions or functions within the light source module. The first quantum dot layer uses quantum dots with first particle diameters optimized for converting first color light, while the second quantum dot layer uses quantum dots with second particle diameters optimized for converting second color light. Each region uses quantum dots with uniform local properties, reducing manufacturing complexity and cost
2Ease of manufacture
If quantum dots with uniform particle diameter are used, then production costs are reduced, but absorption spectrum coverage decreases
Solution Approach 1:
The patent segments the absorption spectrum coverage task across multiple quantum dot layers. The first quantum dot layer with first particle diameters handles absorption of first color light, while the second quantum dot layer with second particle diameters handles absorption of second color light. Each layer maintains uniform particle diameter for cost-effective production, while the combination achieves broad spectrum coverage
Solution Approach 2:
The quantum dot element structure is designed to perform multiple light conversion functions simultaneously. The first quantum dot layer and second quantum dot layer work together to convert different portions of the spectrum, making the overall system adaptable to broad spectrum requirements while each individual layer maintains simple, uniform particle diameter composition for ease of manufacture
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 effectively reduces production costs and enhances color saturation and brightness by utilizing quantum dots with a single particle diameter, improving light utilization and color rendering properties in display panels.
Implementation Method 1
The quantum dot element converts only a portion of the first color light into a first monochromatic light
Implementation Method 2
The light guide element has a light incident surface and a light exiting surface
Data Source
AI summary
A light source module includes a light guide element, at least one light-emitting element, and a quantum dot element. The light guide element has a light incident surface and a light exiting surface. The light-emitting element is disposed at the light incident surface for providing a first color light. The quantum dot element converts only a portion of the first color light into a first monochromatic light. The first color light and the first monochromatic light are mixed into a white light.