Non-red-explosion VCSEL infrared light supplement lamp circuit

Abstract

The invention discloses a non-red-explosion VCSEL infrared fill-in light circuit which comprises a power supply circuit, an enabling and protecting circuit, a VCSEL driving circuit and an infrared VCSEL, the power supply circuit comprises a power supply and a voltage stabilizing circuit, wherein the power supply circuit is connected with the enabling and protecting circuit through the voltage stabilizing circuit, the enabling and protecting circuit is connected with the output end of the VCSEL driving circuit and used for detecting output signals of the VCSEL driving circuit, and the output end of the VCSEL driving circuit is connected with the infrared VCSEL. According to the invention, the infrared VCSEL with the wavelength of 940 nm is used for solving the red explosion phenomenon; theVCSEL driving circuit is used for driving the plurality of infrared VCSEL lamp beads, the power of a single infrared VCSEL is reduced, the heating of the single infrared VCSEL is reduced, the servicelife of a monitoring camera is prolonged, a high-end current detection chip is used for detecting the output current of the VCSEL driving circuit, and the circuit fault self-detection is realized.

Description

technical field [0001] The invention relates to the technical field of infrared supplementary light circuits, in particular to a non-red burst VCSEL infrared supplementary light circuit. Background technique [0002] The optical imaging sensor that the imaging of the surveillance camera relies on mainly senses the external light and converts it into an electrical signal. When the light is dark or even there is no light, the object is generally seen by increasing the exposure time and amplifying the gain value, but the image noise at this time It is very large and cannot meet the requirements of security monitoring. It is necessary to enhance the external light through infrared supplementary light. At present, the supplementary light system of infrared cameras still has the following two problems in practical applications: (1) ordinary infrared supplementary light generally has red Burst phenomenon, once the infrared fill light is turned on, there will be a red burst phenomen...

AI Technical Summary

Problems solved by technology

[0002] The optical imaging sensor that the imaging of the surveillance camera relies on mainly senses the external light and converts it into an electrical signal. When the light is dark or even there is no light, the object is generally seen by increasing the exposure time and amplifying the gain value, but the image noise at this time It is very large and cannot meet the requirements of security monitoring. It is necessary to enhance the external light through infrared supplementary light. At present, the supplementary light system of infrared cameras still has the following two problems in practical applications: (1) ordinary infrared supplementary light generally has red Burst phenomenon, once the infrared fill light is turned on, there will be a red burst phenomenon, which is not conducive to concealment and affects the visual effect

(2) When monitoring close-range objects, the center of the image will be over-exposed due to the excessive brightness of the infrared light and the concentration of the light-emitting angle. When the circuit is abnormal, the fault self-test cannot be realized

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