Light-Emitting Module Multilayer Optics for Mask-Free Taillight Colors
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Solution Overview
Problem
Traditional taillight products face challenges in achieving multiple colors without increasing the cost, particularly with the use of OLEDs, as additional masks and process flows are required for color variation.
Innovation Solution
A light-emitting module with a functional layer comprising alternately arranged sub-functional layers of different refractive indices, specifically silicon nitride and silicon oxide, to convert light into specific colors without additional masks or process steps.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional OLED taillight products use additional masks and process flows to achieve multiple colors, then color variety is improved, but manufacturing cost and process complexity increase
Solution Approach 1:
The patent changes the optical parameters of the functional layer by introducing multiple sub-layers with different refractive indices and thicknesses. By adjusting the refractive index parameters and thickness parameters of each sub-layer, different colors can be achieved without additional masks or process flows, thus resolving the contradiction between color variety and process complexity
Solution Approach 2:
The patent uses composite material structure with multiple sub-functional layers having different refractive indices (first sub-functional layer with refractive index 1.7-2.0 and second sub-functional layer with refractive index 1.4-1.6). This composite structure enables color conversion through optical interference, achieving multi-color display without increasing manufacturing process complexity
2Adaptability or versatility
If traditional OLED taillight products use additional masks to achieve multiple colors, then color variety is improved, but manufacturing cost increases
Solution Approach 1:
The patent achieves color variety by changing the optical parameters (refractive index and thickness) of the functional layer sub-layers rather than using additional masks. This parameter-based approach eliminates the need for expensive additional masking materials and processing steps, thereby reducing manufacturing cost while maintaining color variety
Solution Approach 2:
The patent applies local quality by creating sub-layers with different refractive indices at specific positions within the functional layer. The first sub-functional layer (refractive index 1.7-2.0) and second sub-functional layer (refractive index 1.4-1.6) are arranged with specific thickness ratios to achieve color conversion through optical interference, enabling multi-color display without additional masks
3Adaptability or versatility
If the functional layer uses multiple sub-functional layers with different refractive indices, then color conversion capability is improved, but structural complexity increases
Solution Approach 1:
The patent improves color conversion capability by changing the optical parameters of the functional layer - specifically introducing sub-layers with different refractive indices (first sub-functional layer: 1.7-2.0, second sub-functional layer: 1.4-1.6) and optimizing their thickness ratios. This parameter optimization enables effective color conversion while keeping the structural complexity manageable through systematic design
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
Enables multi-color display in taillights without increasing production costs, enhancing lighting quality and simplifying manufacturing processes.
Implementation Method 1
The functional layer comprises N sub-functional layers disposed in sequence in a direction away from the first base substrate, and N≥3. The sub-functional layer comprises at least one first sub-functional layer and at least one second sub-functional layer; the first sub-functional layer and the second sub-functional layer are alternately arranged; and the refractive index of the first sub-functional layer is greater than the refractive index of the second sub-functional layer.
Data Source
AI summary
The present disclosure provides a light-emitting module and a light-emitting device, and belongs to the technical field of lighting. A light-emitting module is disclosed, which comprises a first base substrate, and a functional layer and at least one light-emitting element disposed on the first base substrate; the light-emitting element is provided with a first electrode, a light-emitting layer and a second electrode in sequence on the functional layer in a direction away from the first base substrate; the functional layer is located on a side of the first electrode close to the first base substrate, and is configured to convert the light emitted by the light-emitting element into the light of a specific color; wherein the functional layer comprises N sub-functional layers disposed in sequence in a direction away from the first base substrate, and N≥3.