Vehicle Lamp Light Source Module with Adjustable Color Temperature
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Solution Overview
Problem
Existing vehicle lamp light source modules have a fixed correlated color temperature that cannot be adjusted to optimize visibility for drivers based on their vision or traveling conditions, such as city driving, expressway driving, or rainy conditions.
Innovation Solution
A light source module comprising a first light-emitting element, a second light-emitting element, and a wavelength conversion member that adjusts the correlated color temperature by converting and transmitting light within specific wavelength ranges, allowing individual control of the light sources to achieve optimal color temperature for different conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed correlated color temperature light source module is used, then the structure is simple and manufacturing is easy, but the adaptability to different driving conditions and driver vision requirements is poor
Solution Approach 1:
The light source module is segmented into multiple independent light-emitting elements with different dominant wavelengths (first, second, and third light-emitting elements). Each element can be controlled independently, allowing the system to adjust the mixed light's correlated color temperature according to different driving conditions and driver vision requirements, thereby improving adaptability without requiring a complete redesign of the light source module structure
Solution Approach 2:
The light source module transitions from a fixed correlated color temperature output to a dynamic adjustable system. By individually controlling the emission intensity of each light-emitting element based on detected driving conditions (such as daytime running mode, nighttime mode, or daytime mode), the system can dynamically adjust the correlated color temperature to optimize visibility and driver comfort for different scenarios
2Adaptability or versatility
If multiple light-emitting elements with different wavelengths are used, then the correlated color temperature can be adjusted, but the device complexity increases
Solution Approach 1:
Multiple light-emitting elements with different dominant wavelengths are merged into a single light source module with a unified optical path. The first light-emitting element (e.g., blue LED), second light-emitting element (e.g., amber LED), and third light-emitting element (e.g., green LED or phosphor) are positioned to emit light toward the same wavelength conversion member, allowing their outputs to combine and form mixed light with adjustable correlated color temperature while maintaining a compact integrated structure
Solution Approach 2:
A wavelength conversion member is introduced as an intermediary component between the light-emitting elements and the output. This wavelength conversion member converts specific wavelengths from the light-emitting elements to achieve the desired spectral composition and correlated color temperature for the mixed light, simplifying the control mechanism by using optical conversion rather than direct electronic control of each wavelength component
3Illumination intensity
If the wavelength conversion member converts only a portion of the light, then the correlated color temperature can be optimized, but some original wavelength light is transmitted without conversion
Solution Approach 1:
The wavelength conversion member is designed to convert a specific portion of the light from the first light-emitting element while allowing other wavelengths to pass through. By adjusting the conversion ratio and selecting appropriate conversion materials, the system can optimize the correlated color temperature of the mixed light to match different driving conditions (such as cooler temperatures for nighttime driving or warmer temperatures for daytime driving), thereby improving illumination quality and driver comfort
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 solution enables adjustable correlated color temperature of the combined light, improving visibility and safety by optimizing light output based on driving conditions, reducing luminance and color unevenness, and enhancing the utilization efficiency of the light source.
Implementation Method 1
The wavelength conversion member converts a portion of the light having a dominant wavelength in the first wavelength range emitted by the first light-emitting element to light having a dominant wavelength in a third wavelength range
Implementation Method 2
transmits a portion of the light having a dominant wavelength in the first wavelength range emitted by the first light-emitting element
Implementation Method 3
substantially transmits the light having a dominant wavelength in the second wavelength range emitted by the second light-emitting element
Data Source
AI summary
A light source module includes first LED elements that emit blue light, second LED elements that emit amber light, and a wavelength conversion member disposed in optical paths of the first LED elements and the second LED elements. The wavelength conversion member converts a portion of the blue light emitted by the first LED elements to yellow light, transmits a portion of the blue light emitted by the first LED elements, and substantially transmits the amber light emitted by the second LED elements.