Vehicular Scanning Light Source Motor Start Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing vehicular lighting systems, particularly high-beam modes, face challenges in adapting to dynamic driving conditions, such as glare reduction for oncoming vehicles or pedestrians, and have limited response to headlight flashing operations.
Innovation Solution
A vehicular scanning lighting device with a semiconductor light source and motor that scans a region in front of the vehicle, controlled by a lighting circuit to adjust light quantity synchronously with motor motion, and starts motor rotation upon headlight flashing, ensuring continuous lighting during the start-up period.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the motor is started during headlight flashing operation, then the response to flashing is improved, but the light distribution pattern cannot be formed during the start-up period
Solution Approach 1:
The patent applies preliminary action by continuously lighting the semiconductor light source during the motor start-up period before the normal lighting period begins. This ensures that when the headlight flashing command is issued, the light source is already active and can respond immediately, while the motor completes its startup. The light quantity is controlled to be continuous during this transition, avoiding any interruption in lighting response.
2Manufacturing precision
If the light quantity is changed in synchronization with motor motion during normal lighting period, then the light distribution pattern is optimized, but the control complexity increases
Solution Approach 1:
The patent implements feedback control by synchronizing the light quantity changes with the motor's rotational position. The control unit receives feedback signals from the motor's position sensor and adjusts the semiconductor light source's output accordingly. This feedback mechanism enables precise control of the light distribution pattern while maintaining a relatively simple control architecture through coordinated synchronization rather than complex independent control systems.
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
Improves the response to headlight flashing operations and adapts light distribution dynamically to reduce glare, enhancing safety and visibility while maintaining efficient operation.
Implementation Method 1
a semiconductor light source and a motor, and is configured to scan a region in front of the lighting device, with light emitted from the semiconductor light source
Implementation Method 2
a rotating reflector (blade), and the reflector reflects the incident light at an angle corresponding to the rotational position of the reflector
Data Source
AI summary
A vehicular lighting device includes a scanning light source that includes a semiconductor light source and a motor, and scans a region in front of the lighting device, with light emitted from the semiconductor light source, in accordance with motion of the motor, and a lighting circuit that changes the light quantity of the semiconductor light source in synchronization with the motion of the motor, during a normal lighting period, so as to obtain a predetermined light distribution pattern. The lighting circuit starts the motion of the motor, in response to a lighting command for headlight flashing during a stop period of the motor, and continuously lights the semiconductor light source asynchronously with the motion of the motor, during a start-up period that precedes the normal lighting period.