Multicolor Light Source Layout Using Nanorods and Wavelength Conversion
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Solution Overview
Problem
Integration of micro-LED displays using micro-LED chips of the three primary colors (red, green, and blue) is challenging and costly, with miniature-sized red micro-LEDs having low light efficiency, affecting color purity and gamut.
Innovation Solution
A multicolor light source device comprising a substrate, light-emitting frame, and light-emitting nanorods with wavelength conversion layers, where the frame emits a color and the nanorods excite the conversion layers to form other colors, enhancing light efficiency and purity while reducing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If micro-LED chips of the three primary colors (red, green, and blue) are integrated to form display panels, then the device complexity and manufacturing cost increase, but the color purity and gamut are affected due to low light efficiency of miniature red micro-LEDs
Solution Approach 1:
The device segments the light emission function into two parts: blue light-emitting diodes (frame and nanorods) and wavelength conversion layers. Instead of integrating three separate micro-LED chip types, the patent uses a single blue LED type with wavelength conversion to produce multiple colors, simplifying the device structure while maintaining color purity.
Solution Approach 2:
The wavelength conversion layer acts as an intermediary between the blue light source and the final multicolor output. The blue light from the LED excites the wavelength conversion layer, which then emits light at different wavelengths (colors), effectively converting a single-color source into a multicolor source with high color purity.
2Volume of moving object
If miniature-sized red micro-LEDs are used, then the device size is reduced, but the light efficiency decreases, affecting color purity
Solution Approach 1:
The patent changes the operating parameters by using blue LEDs (which have higher efficiency at miniature sizes) instead of red LEDs, and compensates for the color requirement through wavelength conversion. This parameter change allows maintaining small device size while avoiding the light efficiency loss associated with miniature red LEDs.
3Loss of energy
If wavelength conversion layer is filled in the gap between light-emitting nanorods, then the contact surface area increases improving wavelength conversion effect, but the manufacturing precision requirement increases
Solution Approach 1:
The manufacturing process uses self-service principles where the nanorod array structure itself guides the wavelength conversion material filling. The material is deposited or infiltrated into the gaps between nanorods, and the nanorod arrangement automatically provides the necessary spacing and alignment, reducing the need for high-precision external control while maximizing contact surface area.
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 device achieves high light efficiency and low cost with improved color purity, maintaining good light efficiency for all colors even in miniature sizes, and supports applications like displays and optical communication.
Implementation Method 1
at least one wavelength conversion layer is configured in the at least one containing space and between the plurality of light-emitting nanorods
Implementation Method 2
The plurality of light-emitting nanorods are configured on the substrate and located in the at least one containing space. The light-emitting frame and the plurality of light-emitting nanorods are a plurality of light-emitting diode stacks of a same light-emitting color
Data Source
AI summary
Disclosed is a multicolor light source device including a substrate, a light-emitting frame, a plurality of light-emitting nanorods, and at least one wavelength conversion layer. The light-emitting frame is configured on the substrate and surrounds at least one containing space. The plurality of light-emitting nanorods are configured on the substrate and located in the at least one containing space. The light-emitting frame and the plurality of light-emitting nanorods are a plurality of light-emitting diode stacks of a same light-emitting color. The at least one wavelength conversion layer is configured in the at least one containing space and between the plurality of light-emitting nanorods. A manufacturing method of a multicolor light source device