Optical Unit Stepwise Brightness Transition Control
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Solution Overview
Problem
Existing optical units for vehicle lamps face challenges in achieving a smooth transition in brightness at the boundaries of light-shielding portions, leading to discomfort or reduced visibility due to either sharp or gentle changes in brightness.
Innovation Solution
An optical unit with multiple light sources and a control system that adjusts the timing and intensity of light emission to create stepwise brightness changes at light-shielding boundaries by overlapping and deviating the ranges of light-shielding portions formed by different irradiation patterns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the change in brightness at the bright/dark boundary is made sharp, then the light-shielding portion range becomes clear, but a sense of discomfort is given to the viewer
Solution Approach 1:
The patent divides a single light source into multiple light sources (first light source and second light source), each forming separate irradiation patterns with light-shielding portions. By segmenting the light emission function, the system creates multiple overlapping light distribution patterns that can independently control brightness transitions at boundaries.
Solution Approach 2:
The patent combines multiple irradiation patterns from different light sources to form a composite light distribution pattern. The light-shielding portions from different sources are overlapped and deviated, merging their effects to create a unified brightness transition that is both clear and comfortable.
2Object-affected harmful factors
If the change in brightness at the bright/dark boundary is made gentle, then comfort is improved, but the range of the light-shielding portion becomes unclear
Solution Approach 1:
The patent segments the light emission function into multiple independent light sources, allowing each to create light-shielding portions with different characteristics. This segmentation enables one source to provide clear boundaries while another provides gentle transitions.
Solution Approach 2:
The patent introduces a new dimension of control by using multiple light sources with deviated light-shielding ranges. Instead of adjusting a single boundary, the system controls multiple overlapping boundaries at different positions, creating a multi-layered brightness transition effect.
3Object-affected harmful factors
If multiple light sources are used to create stepwise brightness changes, then brightness transition comfort is improved, but device complexity increases
Solution Approach 1:
The patent divides the lighting system into multiple independent light sources, each capable of forming light-shielding portions. This segmentation allows parallel control of different brightness regions, achieving smooth transitions without requiring complex sequential control mechanisms.
Solution Approach 2:
The patent employs periodic scanning of light beams to create the light distribution patterns. By controlling the timing of light emission during the scanning cycle, the system achieves stepwise brightness changes without requiring additional mechanical components or complex control logic.
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 solution alleviates the discomfort and visibility issues by creating a controlled, stepwise brightness transition at light-shielding boundaries, allowing for adaptable light distribution patterns based on vehicle conditions.
Implementation Method 1
a rotary reflector that rotates in one direction around its rotation axis while reflecting light emitted from the first light source and the second light source
Data Source
AI summary
The control part controls a timing of changing the light emission intensity of the first light source and a timing of changing the light emission intensity of the second light source such that a first light-shielding portion is formed in a part of the first irradiation pattern, a second light-shielding portion is formed in a part of the second irradiation pattern so as to overlap with the first light-shielding portion, and a range of the first light-shielding portion and a range of the second light-shielding portion are deviated from each other.