Vehicle Lighting Device with Rotating Blade and Person Detection
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Solution Overview
Problem
Existing vehicle lighting devices struggle to provide a bright and focused light distribution to attract attention, as the light source is often turned on for a short duration and dispersed while the blade rotates, making it difficult for pedestrians or cyclists to notice the light effectively.
Innovation Solution
A lighting device with a rotating blade and a control system that detects individuals in front of the vehicle, positioning the blade to irradiate a specific area with light only when the light source is turned on, ensuring a bright and sharp light distribution by synchronizing the blade's rotation with the light source's activation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the light source is turned on in synchronization with the rotation of the blade to irradiate a person, then the light can be directed toward the target area, but the turn-on time is shortened causing the light to be darkened and dispersed
Solution Approach 1:
The control device determines the specific timing for turning on the light source based on the rotation angle of the blade before actual light emission occurs. This preliminary timing determination ensures that the light source is activated at the optimal moment when the blade is positioned to reflect light toward the detected person, maximizing illumination intensity while maintaining appropriate duration.
Solution Approach 2:
The system uses a detector to detect persons in front of the vehicle and provides feedback to the control device. The control device then adjusts the light source activation timing based on this feedback, creating a closed-loop control system that optimizes light emission timing to ensure both sufficient brightness and appropriate duration for effective person notification.
2Illumination intensity
If the light source is turned on while the blade rotates to attract attention, then light can be emitted toward the target area, but the light distribution pattern becomes blurred
Solution Approach 1:
The control device calculates and determines the precise timing for light source activation based on the blade's rotation angle before light emission begins. This preliminary timing determination ensures that the light source is activated only when the blade is in the correct position to produce a sharp, focused light distribution pattern toward the detected person, rather than during arbitrary rotation phases that would cause blurring.
3Productivity
If the blade rotates quickly to scan the area, then the lighting device can cover more area, but the light source turn-on time is further reduced making light even darker
Solution Approach 1:
The detector provides feedback about person detection, and the control device uses this feedback to optimize the light emission strategy. When a person is detected, the system activates the light source at precisely determined timing based on blade position, ensuring sufficient brightness even during quick rotation. The feedback mechanism allows the system to adapt light emission parameters to maintain effectiveness despite high rotation speeds that enable broader area coverage.
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 provides a noticeable and focused light irradiation to attract attention, enhancing visibility and safety by maintaining a consistent light intensity and distribution, which is more effective than traditional methods.
Implementation Method 1
The blade includes a reflective surface configured to reflect light irradiated from the light source toward an area in front of the vehicle
Data Source
AI summary
A lighting device for a vehicle includes a light source configured to perform light irradiation, a blade including a reflective surface configured to reflect light irradiated from the light source toward an area in front of the vehicle, the blade being configured to rotate around a rotation axis, a drive device configured to rotationally drive the blade around the rotation axis, a detector configured to detect a person in front of the vehicle, and a control device configured to, in a case where the person is detected by the detector, control the light source and the drive device such that the drive device rotationally drives the blade to a position where a region in a prescribed range is irradiated with light reflected from the reflective surface of the blade and the light source is turned on.