Vehicular Lamp Adaptive Illumination via Scanning Mirror
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Solution Overview
Problem
Existing vehicular lamps cannot adjust the illuminance distribution of parallel light, limiting their ability to implement adaptive front lighting systems that intensely illuminate desired positions.
Innovation Solution
A vehicular lamp configuration that includes a light-collection point, a mirror for light deflection, and a second optical element to generate adjustable parallel scanning light, with control units for mirror rotation and light source brightness to vary illuminance distribution and brightness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a light source and collimating optics are used to generate parallel light, then the light can be directed precisely, but the illuminance distribution cannot be adjusted
Solution Approach 1:
The patent segments the optical system into multiple functional components: a light source unit, a collimating optics unit, and a light irradiation control unit. This segmentation allows independent optimization of each component, where the collimating optics provides precise directional control while the control unit adjusts illuminance distribution by selectively blocking or transmitting light rays, thus resolving the contradiction between precision and adaptability.
Solution Approach 2:
The patent introduces dynamic control capability through the light irradiation control unit, which can dynamically adjust the illuminance distribution of parallel light by controlling the transmission or blocking of individual light rays. This dynamic adjustment mechanism transforms a static optical system into an adaptive one, enabling real-time modification of illuminance patterns without compromising the precision of parallel light generation.
2Illumination intensity
If current control is used to vary light source brightness, then overall intensity changes, but regional illuminance distribution remains fixed
Solution Approach 1:
The patent separates the overall intensity control function from the regional illuminance distribution function. The light source unit handles overall intensity through current control, while the light irradiation control unit handles regional distribution by selectively controlling individual light rays. This functional segmentation allows both overall brightness adjustment and regional illuminance modification to operate independently and simultaneously.
Solution Approach 2:
The patent introduces a light irradiation control unit as an intermediary between the light source and the target area. This intermediary component receives parallel light from the light source and selectively transmits or blocks specific light rays to achieve desired regional illuminance distribution. The intermediary enables regional control without affecting the overall intensity control capability of the light source.
3Ease of operation
If parallel light is incident on a liquid crystal device, then selective transmission can be controlled, but the device shows different characteristics at different incident angles
Solution Approach 1:
The patent uses collimating optics to make all light rays incident on the liquid crystal device parallel, creating an equipotential condition where all rays experience the same incident angle. This eliminates the performance variation caused by different incident angles, ensuring consistent liquid crystal device characteristics across the entire light beam while maintaining selective transmission control 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
Enables precise control of illuminance distribution and brightness of scanning light, allowing for adaptive illumination patterns that can intensely illuminate specific regions, improving night-time visibility and safety.
Implementation Method 1
a first optical element having a light-collection point on an emission side at a first position, the first optical element being configured to collect incident light from the light source at the first position
Implementation Method 2
a light deflector including a mirror disposed at the first position, the mirror forward- and reverse-rotating around an axis passing through the first position, the light deflector being configured to reflect incident light from the first optical element with the mirror to deflect the light
Implementation Method 3
a second optical element for projecting configured as a convex lens, configured to project the scanning light to an irradiation region ahead
Data Source
Figure 1
Figure 2A~2B
Figure 3
AI summary
A light irradiation device (1) includes a light-source module (2), a light deflector (3), a parallel light generation unit (4), and a projecting light generation unit (5) in this order along the optical path. All of the light-collection point of the light-source module (2) on the emission side, the center mirror Or of the light deflector (3), and the focal point of the parallel light generation unit (4) on the incidence side are set at the same position P1. The mirror (31) of the light deflector (3) forward- and reverse-rotates about the axis passing through the mirror center Or to emit scanning light Ls as the reflected light and the deflected light to the parallel light generation unit (4). The parallel light generation unit (4) collimates the scanning light Ls to be parallel light that is parallel to the optical axis for emission.