Circuit for portable day and night dual-purpose night-vision device

Abstract

The invention discloses a circuit for a portable day and night dual-purpose night-vision device which can work on both day and night. The circuit comprises an imaging circuit, an image decoding and displaying circuit and a power supply and main control circuit. The imaging circuit is used for acquiring images; the image decoding and displaying circuit is used for decoding a video signal on the images acquired by the imaging circuit and displaying the images; and the power supply and main control circuit is used for providing qualified power supplies to the imaging circuit and the image decoding and displaying circuit and for realizing and controlling image signal channels and all application functions of the whole device. The imaging circuit is a CCD imaging circuit; the image decoding and displaying circuit adopts a microdisplay and outputs colored images in light and dimlight. In the invention, the CCD chip combination is adopted to ensure image acquisition in light; in addition, since an infrared light source is built in the night-vision device, the night-vision device shows colored images in light and dimlight and shows black-white effect in complete dark; and the observation distance in light is infinite and the observation distance in dimlight is more than 600 m, and the observation distance in complete dark is less than 250 m.

Description

technical field [0001] The invention relates to a circuit of a day and night dual-purpose night vision device, in particular to a circuit of a portable day and night dual-purpose digital color night vision device. Background technique [0002] Night vision devices are professional products with high-tech photoelectric integration. At present, night vision devices are divided into portable and non-portable types in terms of power consumption. High power consumption, complex optical system, long night vision distance, etc. Most of them are for military use, but they are expensive. Portable ones are all powered by batteries. The optical system is simple, the night vision distance is short, the price is cheap, and most of them are for civilian use. From the electrical field, imaging means can be divided into low-light tube night vision devices and CCD-type night vision devices. Low-light tube imaging night vision devices can only work in low-light and pure black environments, an...

AI Technical Summary

Problems solved by technology

Active night vision devices and passive night vision devices are divided into auxiliary light sources. According to the insensitivity of human eyes to infrared rays, active night vision devices are equipped with 850nm-950nm wavelength infrared light sources or infrared laser light sources for irradiation. The target is imaged through infrared reflection, which is characterized by a long observation distance (related to the infrared emission power), but poor concealment. The passive night vision device has no auxiliary infrared light source, and is captured and imaged by the reflected light of the target itself or the infrared rays emitted by itself. It is characterized by good concealment, but the observation distance is short

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