Anti-overexposure device, night vision system and vehicles

Abstract

The invention provides an anti-overexposure device, a night vision system and vehicles, wherein the night vision system comprises an anti-overexposure device; the anti-overexposure device obtains an optical signal by using a detection circuit for detecting the illumination light of a preset wave band emitted by intersection vehicles; further, a control circuit is used for controlling an adjustingcomponent to adjust a lighting area of a light source according to the optical signal detected by the detection circuit, so that the adjusting component adjusts the lighting area of the light source under the control of the control circuit so as to eliminate an image overexposure phenomenon caused by the light source to the same active night vision system of the intersection vehicles. According tothe embodiments of the invention, the lighting area of the light source is adjusted, so that the aim of preventing overexposure is achieved; therefore, the embodiments can be applied to various typesof light sources; the problem of a night view image overexposure phenomenon caused between two intersection vehicles with the same active night vision system in the prior art is solved; and the lightsource utilization rate is high, the cost is low, and the applicability is wide.

Description

technical field [0001] The invention relates to the technical field of vehicle control, in particular to an anti-overexposure device, a night vision system and a vehicle. Background technique [0002] With the continuous development of vehicle night vision systems, active infrared night vision systems are more and more applied to security monitoring, vehicles and other fields, so as to increase the line of sight and monitor the road conditions ahead at night or when visibility is poor. Night vision lighting is an essential part of the active infrared night vision system, mainly used to provide the light source lighting required for imaging. [0003] However, in practical applications, it is found that when two vehicles have the same night vision system, when the two vehicles meet, the infrared illumination light from the opposite vehicle will directly shine on the night vision system of another vehicle, so the night vision system of the vehicle The imaging unit will experie...

AI Technical Summary

Problems solved by technology

[0003] However, in practical applications, it is found that when two vehicles have the same night vision system, when the two vehicles meet, the infrared illumination light from the opposite vehicle will directly shine on the night vision system of another vehicle, so the night vision system of this vehicle The imaging unit will experience severe overexposure, which will affect the imaging of the night vision system

[0004] At present, amplitude modulation, MEMS avoidance, and grid block avoidance methods have appeared in the prior art, but these methods are less reliable. The polarization characteristics of the infrared light source are used to avoid polarization, but the utilization rate of the light source is extremely low and the cost is high, so it cannot be widely used in vehicles

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