Vehicle Lighting Control via Optical Pulse Signal Demodulation
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Solution Overview
Problem
The frequent use of high-beam headlamps at night often interferes with the line of sight of oncoming or following drivers, leading to increased risk of traffic accidents, necessitating a method to prevent such interference.
Innovation Solution
A lighting control method and device that utilize optical signals to determine the position of a second vehicle relative to the first vehicle and control the headlamps or taillamps to switch from high-beam to low-beam mode based on received pulse signals, ensuring safe illumination levels during encounters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If high-beam headlamp is used to improve illumination effect, then illumination intensity is improved, but line of sight of another driver is seriously interfered
Solution Approach 1:
The system uses optical demodulators to detect pulse signals from other vehicles' lamps, identifies their position and state, and provides feedback to the controller. Based on this feedback, the controller automatically adjusts the headlamp between high-beam and low-beam modes, resolving the contradiction between maintaining good illumination and avoiding interference to other drivers.
Solution Approach 2:
The lighting control system operates autonomously by automatically detecting other vehicles through optical signals, determining their relative positions, and self-adjusting the headlamp mode without requiring manual driver intervention. This self-service mechanism ensures continuous optimal illumination while preventing interference to other drivers.
2Reliability
If automatic lighting control is implemented to prevent interference, then safety is improved, but device complexity increases
Solution Approach 1:
The optical demodulator serves multiple functions: it receives optical signals from other vehicles, demodulates pulse signals, and enables position determination. This multi-functionality reduces the need for separate dedicated components for each function, thereby limiting the increase in device complexity while maintaining high safety through automatic control.
Solution Approach 2:
The patent uses optical signals and pulse modulation as intermediaries to communicate vehicle position and lamp state information between vehicles. This intermediary approach enables automatic safety control without requiring complex direct sensing or communication hardware, thus improving safety while controlling system complexity.
Data Source
AI summary
A lighting control method for use in a first vehicle is provided. The method includes receiving an optical signal from a lamp of a second vehicle; identifying a pulse signal included in the optical signal; determining a position of the second vehicle relative to the first vehicle; and controlling a lamp of the first vehicle in accordance with the position of the second vehicle and the pulse signal.