Vehicle Lighting Fixture with Single Screen and Scanning Deflectors
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Solution Overview
Problem
Conventional vehicle lighting fixtures with multiple screen members and projection lenses are bulky and costly due to the increased number of parts, limiting miniaturization and leading to uneven wear and potential damage of optical deflectors from constant high luminance distribution loads.
Innovation Solution
A vehicle lighting fixture design that uses a single screen member with multiple optical deflectors, allowing for adjustable luminance distributions to distribute load evenly and extend the life of the deflectors, featuring a configuration with a reference axis for the optical system, screen member, and optical deflectors, and utilizing semiconductor light sources or optical fibers for miniaturization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple screen members and projection lenses are used, then a predetermined light distribution pattern can be formed, but the device size increases and manufacturing cost increases
Solution Approach 1:
The patent combines multiple screen members and projection lenses into a single screen member that integrates multiple luminance distribution patterns. This merging approach maintains the ability to form predetermined light distribution patterns while reducing the number of parts and device complexity.
Solution Approach 2:
The single screen member is designed to perform multiple functions by incorporating multiple luminance distribution patterns (first, second, and third patterns with different characteristics) within one component. This allows the screen member to adapt to different lighting conditions and requirements without needing separate components for each function.
2Reliability
If multiple screen members and projection lenses are used, then a predetermined light distribution pattern can be formed, but miniaturization is prevented
Solution Approach 1:
By merging multiple screen members and projection lenses into a single integrated screen member, the overall volume of the lighting fixture is reduced while maintaining the capability to form predetermined light distribution patterns.
Solution Approach 2:
The patent embeds multiple luminance distribution patterns within a single screen member structure, similar to nested dolls. This allows multiple functional patterns to coexist in a compact form, enabling miniaturization of the overall fixture while preserving light distribution capabilities.
3Reliability
If constant high luminance distribution loads are applied to optical deflectors, then light distribution can be maintained, but the deflectors suffer uneven wear and potential damage
Solution Approach 1:
The patent implements dynamic switching between multiple luminance distribution patterns (first, second, and third patterns) rather than maintaining a constant high load pattern. This dynamic approach allows the optical deflectors to vary their operating conditions, preventing sustained high stress on any single deflector and thereby extending their lifespan while maintaining light distribution functionality.
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 design achieves miniaturization, reduces manufacturing costs, extends the life of optical deflectors by evenly distributing load, and produces a predetermined light distribution pattern suitable for far-distance visibility with adjustable light intensities.
Implementation Method 1
optical deflectors that scan light from a light source on a screen member
Implementation Method 2
a wavelength converting member on which luminance distributions formed by the respective optical deflectors are scanned to convert wavelengths
Data Source
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AI summary
A vehicle lighting fixture (500A) can include a plurality of optical deflectors (201) while the miniaturization can be achieved as well as the parts number, which may become a cause for cost increase, can be decreased. The vehicle lighting fixture (500A) can be configured to form a predetermined light distribution pattern, and can include a plurality of light sources (12); a plurality of optical deflectors (201) provided to correspond to the plurality of light sources (12), the optical deflector (201) configured to include a mirror part (202) that can scan with light from a corresponding one of the light sources (12); a screen member (18) configured to form a luminance distribution assigned to each of the optical deflectors (201) with the scanning light by the mirror part (202) of the optical deflector (201); an optical system (20) configured to project the luminance distributions formed on the screen member (18) to thereby form the predetermined light distribution pattern; a changing unit (504) configured to change the luminance distribution assigned to each of the optical deflectors (201); and a control unit (504) configured to control the plurality of light sources (12) and the plurality of optical deflectors (201) so that the plurality of optical deflectors (201) each can form the respective luminance distributions assigned to the respective optical deflectors (201) on the screen member (18). Herein, the changing unit (504) can change the respective luminance distributions assigned to the respective optical deflectors (201) at a prescribed timing.