Vehicle Lighting Fixture with Rotary Optical Deflector
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Solution Overview
Problem
Conventional vehicle lighting fixtures are unable to form predetermined light distribution patterns at positions shifted from a reference position, such as horizontally or vertically, limiting their adaptability to varying environments.
Innovation Solution
The vehicle lighting fixture utilizes optical deflectors with a rotary control unit to adjust the rotational direction and amount of rotary reflecting members, allowing the formation of predetermined light distribution patterns at desired positions, including those shifted from the reference position, while minimizing component count and size for cost-effectiveness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional vehicle lighting fixtures use fixed projection lenses and screen members, then the light distribution pattern can be formed at a reference position, but the lighting fixture cannot form patterns at positions shifted from the reference position
Solution Approach 1:
The patent introduces optical deflectors that can dynamically change the direction of light propagation. These deflectors enable the light distribution pattern to be formed at different positions (horizontally and vertically shifted) by adjusting the deflection angles, transforming the fixed optical system into a dynamic one that adapts to various positioning requirements without redesigning the entire optical path.
Solution Approach 2:
The optical deflector serves multiple functions: it directs light to the screen member, enables positional shifting of the light pattern, and maintains the integrity of the light distribution shape. This multi-functional component replaces what would otherwise require multiple separate optical systems for different positioning scenarios.
2Adaptability or versatility
If multiple optical deflectors are used to enable position shifting, then adaptability is improved, but the device size and component count increase
Solution Approach 1:
The patent combines multiple optical deflectors (first and second deflectors) into a compact integrated arrangement where they work together to achieve two-dimensional position shifting. By merging their functions and optimizing their spatial configuration, the system achieves horizontal and vertical positioning capability without proportionally increasing the overall device volume.
Solution Approach 2:
The optical deflectors are arranged in a nested or layered configuration within the lighting fixture housing, with the first deflector positioned for horizontal shifting and the second deflector positioned for vertical shifting. This nesting approach allows multiple positioning functions to be accommodated within a compact form factor.
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 enables the formation of precise light distribution patterns at various positions, enhancing adaptability and reducing production costs through miniaturization and reduced component count, while maintaining effective light projection and distribution.
Implementation Method 1
an optical deflector which includes a mirror part that can scan with light from the light source
Implementation Method 2
a rotary reflecting member provided common to the plurality of optical deflectors and configured to reflect light reflected from mirror parts of the optical deflectors
Implementation Method 3
an optical system configured to project the luminance distribution formed on the screen member to form the predetermined light distribution pattern
Data Source
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AI summary
A vehicle lighting fixture (600) can form a predetermined light distribution pattern at a position shifted from a reference position, for example, a position horizontally or vertically shifted with respect to the reference position. The vehicle lighting fixture (600) can form a predetermined light distribution pattern, and can include: a light source (12); an optical deflector (201) configured to include a mirror part (202) that can scan with light from the light source (12); a rotary reflecting member (602) configured to reflect light having been reflected by the mirror part (202) of the optical deflector (201); a screen member (18) configured to form a luminance distribution by the light reflected by the rotary reflecting member (602); an optical system (20) configured to project the luminance distribution formed in the screen member (18) to form the predetermined light distribution pattern; and a rotary control unit (604) configured to control the rotary reflecting member (602) to form the luminance distribution at a reference position or a position shifted with respect to the reference position. The rotary control unit (604) can control any of the rotational direction and the rotational amount of the rotary reflecting member (602).