Research On Intelligent LED System For Night Vehicle Safety Driving

Driving at night has always been one of the important reasons for traffic accidents,and factors leading to an increase in the rate of nighttime driving accidents include low ambient lighting,as well as the increasing frequency of fatigue,drunkenness.In order to reduce the risk factor of driving at night,many auxiliary driving devices have been developed,such as laser radar,lane keeping reminder,fatigue driving detection equipment,and so on.These devices can assist drivers in obtaining clearer road information from dark environments and providing timely warnings in the event of abnormal conditions such as lane deviation and fatigue driving.However,an obvious limitation is that these devices are only providers of information and cannot provide physical assistance to drivers.In other words,they have not really changed the fatigue prone state of drivers at night.Therefore,it is of great significance to design a driving assistance system that can physiologically improve the driver’s state.The physiological role of light meets this demand,making it possible to further increase the safety of driving at night.Currently,more and more attention is being paid to light’s functionality other than lighting.Nowadays research is basically based on the special properties of light at a certain wavelength.For example,using the sensitivity of molecules to specific wavelengths of light to activate drugs in the body through irradiation;Use blue light to inhibit the secretion of melatonin,thereby reducing human fatigue;Using red light to accelerate photosynthesis and stimulate plant growth.Using the physiological and psychological effects of light to improve people’s working state is also a research hotspot.There have been successful cases of using white light with different color temperatures at different times to ensure that people are in optimal working conditions.These applications can achieve some single functions,but due to the lack of interaction with the external environment,when the external environment changes,the preset functions may no longer meet new scenarios.The change of a person’s mental state is a complex dynamic process.Therefore,an important goal to improve the functionality of similar devices is to add sensor systems that can interact with the outside world in real time,and adjust based on changes.Based on the theory,this paper designs a safe driving assistance system based on QLED,which realizes the entire tracking and real-time control of the driver’s entire driving process,ensures the driver’s awake time,and improves the safety of driving at night.The following are the main research contents of this article:(1)Synthesized Cadmium group quantum dots that needed in the experiments,then encapsulated it into photoluminescent LEDs,and test the light spatial distribution,lumen efficiency,and other performance of the finished LED.(2)Designed a system to quantify driver fatigue,including hardware sensing and fatigue value calculation.Used face recognition technology and PERCLOS algorithm to visualize the fatigue level,and established a change model for the entire driving process of fatigue value changes.(3)Study the physiological stimulation effects of different wavelengths of light,and use trend algorithms to determine the current fatigue stage of drivers.Use corresponding wavelengths of light to alternately stimulate according to the fatigue stage,thereby maximizing the length of safe driving time and reducing accidents.