Dual White LED Light Module for Adjustable Color Temperature
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Solution Overview
Problem
Conventional light-emitting modules that emit white light by mixing red, green, and blue LEDs require a large mixing area, limiting the miniaturization of electronic devices.
Innovation Solution
A light-emitting module comprising multiple white light-emitting components with color temperature conversion units that mix white lights of different predetermined color temperatures to produce an output color temperature, reducing the mixing area and utilizing identical white LEDs to minimize complexity and cost.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If red, green, and blue LEDs are used to emit white light, then the color temperature of white light can be adjusted, but a large mixing area is required
Solution Approach 1:
The patent changes the approach from mixing three primary colors (RGB) to mixing two white light sources with different color temperatures. By adjusting the power levels of white LEDs with different correlated color temperatures (CCTs) and using phosphor conversion layers, the system achieves adjustable color temperature output with a significantly reduced mixing area.
Solution Approach 2:
The patent extracts the color temperature adjustment function from the light mixing process itself. Instead of adjusting the mixing ratios of RGB LEDs to change color temperature, the system uses separate white LED channels with fixed phosphor conversion, allowing color temperature adjustment through simple power ratio control without requiring a large mixing area.
2Adaptability or versatility
If red, green, and blue LEDs are used to emit white light, then white light with adjustable color temperature can be achieved, but the device size is limited
Solution Approach 1:
The patent changes the light emission approach from RGB color mixing to dual-white-LED phosphor conversion. This parameter change reduces the required mixing area and allows for more compact device integration while maintaining adjustable color temperature capability through power ratio control of the two white LED channels.
Solution Approach 2:
The patent merges the color temperature adjustment function into the power control system rather than requiring separate optical mixing paths. By controlling the power ratios of two white LED channels with different CCTs, the system achieves color temperature adjustment without requiring additional space for complex mixing structures.
3Adaptability or versatility
If multiple different colored LEDs are used, then adjustable white light can be produced, but the complexity and cost increase
Solution Approach 1:
The patent changes from using three different colored LED types (red, green, blue) to using two white LED types with different phosphor compositions. This simplifies the device by reducing the number of different LED components while maintaining adjustable white light emission through phosphor conversion and power ratio control.
Solution Approach 2:
The patent makes white LEDs serve multiple functions: they provide the base white light emission and their phosphor conversion layers perform the color temperature adjustment function. This multi-functionality reduces device complexity compared to using three separate colored LEDs, as the white LEDs themselves handle both illumination and color temperature control roles.
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 the production of electronic devices with adjustable white light emission while significantly reducing the mixing area and manufacturing costs, achieving high light-emitting performance with low-cost components.
Implementation Method 1
The first color temperature conversion unit is configured to convert the white light having the first original color temperature to a white light having a first predetermined color temperature
Implementation Method 2
The second color temperature conversion unit is configured to convert the white light having the second original color temperature to the white light having the second predetermined color temperature
Implementation Method 3
mix the white lights having the first and second predetermined color temperatures to output a white light having an output color temperature
Data Source
AI summary
A light-emitting module includes at least one first light-emitting component, at least one second light-emitting component, a first driving component, a second driving component, and a control component. The first light-emitting component is configured to emit a white light having a first predetermined color temperature according to a first power of a first driving signal. The second light-emitting component is configured to emit another white light having a second predetermined color temperature according to a second power of a second driving signal. The control component is configured to separately output the first and second driving signals, and to separately adjust the first and second powers of the first and second driving signals, so as to mix the white lights having the first and second predetermined color temperatures to output a white light having an output color temperature.