Patent ID: 8080904
Filing Date: 2011-12-20
Classification: H01J,H02J

Abstract:
1. A night vision device comprising: an optical system for forming a subject; an image intensifier for converting and intensifying optical signals formed by the optical system into electrical signals, converting the electrical signals into optical signals, and outputting them; a battery; a switch including a power switch; a booster for boosting a battery voltage provided by the battery to an established voltage according to an operation of the power switch, and outputting a boost voltage; a voltage selector for comparing the voltage provided by the battery with a reference voltage, outputting the boost voltage when the battery voltage is below the reference voltage, and outputting the battery voltage when the battery voltage is beyond the reference voltage; a supply controller operable according to a light sense signal, for providing the voltage output by the voltage selector to the image intensifier; a high light sensor for comparing a surrounding brightness with an established brightness, and outputting a light sense signal according to a comparison result; a coupling sensor for sensing coupling states between the night vision device and a mounting device, and outputting a corresponding coupling sense signal; an infrared emitter; and a battery voltage sensor; wherein the supply controller comprises: a first switching element, operable by the coupling sense signal, for forming a first transfer path of the boost voltage output by the booster; a second switching element, operable by the coupling sense signal, for forming a second transfer path of the select voltage output by the voltage selector; a third switching element, operable by the light sense signal, for transferring the boost voltage provided through the first transfer path to the infrared emitter or the battery voltage sensor; and a fourth switching element operable by the light sense signal, for transferring the select voltage provided through the second transfer path to the image intensifier.