Concentric LED Chip Layout for Uniform Color Mixing in Compact Modules
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Solution Overview
Problem
Existing multi-color LED lights require a light-mixing cavity for uniform color synthesis, leading to large product sizes and display issues such as dark edges and bright centers due to compressed reflection angles.
Innovation Solution
A light-emitting element with concentrically arranged RGB and warm-cool light-mixing units on a substrate, eliminating the need for a light-mixing cavity by ensuring rotational symmetry and staggered distribution of RGB and warm-cool chip sets, enhancing light mixing and reducing light loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a light-mixing cavity is used to achieve uniform light-mixing, then the light-mixing effect is improved, but the product size becomes excessively large
Solution Approach 1:
The patent extracts and eliminates the light-mixing cavity from the LED light source structure. By using a light guide plate with diffusion layers directly integrated with the LED beads, the light-mixing function is achieved without requiring a separate hollow cavity, thereby significantly reducing product size while maintaining uniform light-mixing effect
Solution Approach 2:
The patent merges the light-mixing cavity function into the light guide plate structure. The light guide plate incorporates diffusion layers and reflective layers that perform light-mixing functions previously requiring a separate cavity, integrating multiple functions into a single component to reduce overall structure size
2Volume of moving object
If the light-mixing cavity is shortened to reduce product size, then the product size is reduced, but the light-mixing effect deteriorates due to compressed reflection angles
Solution Approach 1:
The patent applies local quality by incorporating specific functional layers at different locations of the light guide plate. Diffusion layers are positioned at specific locations to scatter light, while reflective layers are placed at bottom and side walls to redirect light, creating locally optimized light-mixing zones that achieve uniform mixing in a compact structure
Solution Approach 2:
The patent transitions from relying solely on the length dimension of a cavity for light-mixing to utilizing multiple dimensions including lateral diffusion layers, bottom reflective layers, and side reflective layers. This multi-dimensional light control approach achieves effective light-mixing in a shorter overall structure
3Illumination intensity
If a light-mixing cavity is used to synthesize colors, then color uniformity is improved, but the structure becomes more complex
Solution Approach 1:
The patent merges the color synthesis function into the light guide plate by integrating diffusion layers and reflective layers that work together with LED beads of different colors. This integrated structure achieves uniform color synthesis without requiring separate complex cavity structures, simplifying the overall device complexity
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
Simplifies the structure, reduces light loss, and improves light efficiency and user experience by uniformly mixing colors without a light-mixing cavity.
Implementation Method 1
the light source module further comprises a heat sink and a diffusion lens; the diffusion lens is provided on a side of the substrate away from the heat sink, and the chip module faces the diffusion lens
Data Source
AI summary
Alight source module comprises the light-emitting element, a heat radiator and a diffusion lens. The light-emitting element comprises a substrate and a chip module arranged on the substrate. RGB light mixing units and cold and warm light mixing units of the light-emitting element are concentrically arranged, a plurality of RGB light mixing units and a plurality of cold and warm light mixing units are alternately arranged at intervals, and the plurality of RGB light mixing units and the plurality of cold and warm light mixing units are rotationally symmetrical about the center of the chip module.