Vehicle Headlight Light Control Section Movement for Variable Patterns
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Solution Overview
Problem
Existing vehicle headlamps lack sufficient color rendering properties and the ability to vary light-distribution patterns, as they typically use either laser elements or LEDs but not both, and struggle with controlling different light sources' emission characteristics.
Innovation Solution
A light-emitting device comprising a light-emitting section that responds to a laser beam, a light control section to guide and control the laser beam, and a movement control section to adjust the illumination position and spot size by moving the light control section relative to the light-emitting section, allowing for variable light-distribution patterns and improved color rendering.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single light source (laser element or LED) is used in vehicle headlamps, then the device structure is simple, but the color rendering properties are insufficient and the ability to vary light-distribution patterns is limited
Solution Approach 1:
The patent combines multiple light sources (laser elements and LEDs) into a single vehicle headlamp system. The light-emitting section includes both laser elements for generating laser beams and LEDs for generating excitation light, allowing the system to achieve both high color rendering properties and variable light-distribution patterns while maintaining structural integration
Solution Approach 2:
The control section is designed to universally control multiple types of light sources (laser elements and LEDs) and multiple optical components (lens and mirror) through a single control system. This multi-functional control architecture enables the headlamp to switch between different lighting modes and patterns without requiring separate control circuits for each component
2Illumination intensity
If multiple light sources are used to improve color rendering, then color rendering properties improve, but controlling different light sources' emission characteristics becomes difficult
Solution Approach 1:
The control section serves multiple functions: it controls both laser elements and LEDs, adjusts the emission characteristics of each light source type, and coordinates the optical components (lens and mirror). This universal control architecture simplifies operation by providing a single interface to manage all emission characteristics despite having multiple light sources
3Adaptability or versatility
If the light control section is moved to change illumination position and spot size, then light-distribution pattern variability improves, but the device complexity increases
Solution Approach 1:
The patent implements a movable light control section that can dynamically change its position relative to the light-emitting section. The movement control section adjusts the illumination position and spot size by moving the light control section along the optical axis, enabling continuous variation of light-distribution patterns from concentrated spot beams to spread floodlights
Solution Approach 2:
The movable light control section serves multiple functions simultaneously: it focuses laser beams, controls illumination position, adjusts spot size, and shapes light-distribution patterns. This multi-functional optical component reduces the need for separate mechanisms for each function, thereby limiting the increase in device complexity despite the added movement capability
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 vehicle headlamps with high color rendering properties and the ability to achieve any light-distribution pattern, controlling light intensity and distribution for effective floodlighting, while reducing power consumption and improving response speed.
Implementation Method 1
a light-emitting section which emits light in response to a laser beam emitted from a laser light source
Data Source
AI summary
A light-emitting device includes a light-emitting section, a lens, and a movement control section, the movement control section changing an illumination position and a spot size of a laser beam in the light-emitting section by changing a relative position of the lens with respect to the light-emitting section.