Rotatable Transmissive Element Headlight for Uniform Color Temperature
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Solution Overview
Problem
Existing headlight devices face challenges in efficiently changing the light distribution pattern and color temperature uniformly, leading to increased complexity and size due to the need for simultaneous movement of semiconductor light emitting elements, reflectors, and projection lenses, and issues with color temperature variation between the center and periphery.
Innovation Solution
A headlight device configuration that includes a light source, a condensing optical element, and a projection lens, where the light concentration position is shifted perpendicular to the projection lens's optical axis, allowing for independent adjustment of the light concentration point to change the irradiation direction and color temperature uniformly across the illumination area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the semiconductor light emitting element, reflector, and projection lens are simultaneously swung and turned to change irradiation direction, then the irradiation direction can be changed, but the mechanism becomes complicated
Solution Approach 1:
The patent extracts the projection lens from the complex integrated mechanism and makes it independently movable. The projection lens can be driven separately to change irradiation direction without requiring simultaneous movement of the light emitting element and reflector, thereby simplifying the overall mechanism while maintaining the capability to change irradiation direction.
Solution Approach 2:
The patent segments the integrated lighting system into independently controllable components: the light emitting element, the reflector, and the projection lens. This segmentation allows the projection lens to be driven independently to change irradiation direction, avoiding the complexity of coordinating simultaneous movement of all components.
2Device complexity
If only the projection lens is leveled and driven to change irradiation direction, then the mechanism is simplified, but the headlight device becomes large in size when viewed from the front
Solution Approach 1:
The patent introduces dynamic adjustment capability to the projection lens by making it movable in the vertical direction. This dynamic element allows the projection lens to be positioned at different heights to change irradiation direction, enabling a compact front view size while maintaining mechanism simplicity.
3Illumination intensity
If the projection lens is made large to improve illumination performance, then the illumination capability is enhanced, but the load on the driving mechanism increases
Solution Approach 1:
The patent applies partial action by making only the projection lens movable rather than the entire lighting assembly. This selective movement reduces the weight that the driving mechanism must handle, lowering the driving load while still achieving the desired illumination performance through the projection lens's optical properties.
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
This configuration simplifies the mechanism, reduces the device's size, and enables efficient adjustment of the irradiation direction and color temperature, preventing color unevenness and maintaining a compact design.
Implementation Method 1
a condensing optical element that converts the light emitted from the light source into concentrated light
Implementation Method 2
a projection lens that projects the concentrated light
Data Source
AI summary
An illumination device includes a light source; a light condensing element for concentrating light from the light source onto a light concentration position; a plate for receiving light from the light condensing element and transmitting such light; a phosphor element for receiving light from the light source at the light concentration position; and a lens for projecting light from the plate. The plate is configured to rotate about an axis perpendicular to an optical axis of the lens to shift the light concentration position, which is between the plate and the lens, in a direction perpendicular to the optical axis of the lens.