Infrared camera with anti-oscillation function, infrared lamp control circuit and method thereof
An infrared camera and infrared lamp technology, which is applied to TVs, electrical components, color TVs, etc., can solve the problem of inability to oscillate infrared lamps, and achieve the effect of improving the anti-oscillation ability.
Active Publication Date: 2014-12-24
HANGZHOU HIKVISION DIGITAL TECH
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[0004] The present invention provides an infrared camera with an anti-oscillation function, an infrared lamp control circuit and a method to at least solve the problem in the related art that it is impossible to avoid the oscillation phenomenon of the infrared lamp from the hardware
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[0030] Hereinafter, the present invention will be described in detail with reference to the drawings and examples. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.
[0031] In the following description, unless indicated otherwise, embodiments of the invention are described with reference to acts and symbolic representations of operations that are performed by one or more computers. Among them, computers include various products such as personal computers, servers, and mobile terminals, and devices that use processing chips such as CPUs, single-chip microcomputers, and DSPs can all be called computers. Thus, it will be appreciated that such acts and operations, which are sometimes referred to as computer-implemented, include the manipulation of electrical signals representing data in a structured form by the processing unit of a computer. This manipulation transf...
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The invention discloses an infrared camera with an anti-oscillation function, an infrared lamp control circuit and a method thereof. A photoelectric converting device in the infrared camera converts an optical signal which is generated by external illumination to an electric signal. The input end of an anti-oscillating circuit is connected with the photoelectric converting device, and the output end is connected with one or a plurality of driving devices. An output level value is determined according to a comparison result between the voltage value of the electric signal and a first brightness threshold or a second brightness threshold, wherein the level value is used for controlling an infrared lamp which is connected with the driving devices for switching on and switching off. The first brightness threshold is lower than the second brightness threshold. When the voltage value of the electric signal is lower than the first brightness threshold, a first level value is output for controlling the driving devices which are connected with the infrared lamp for switching on the infrared lamp. When the voltage value of the electric signal is larger than a second brightness threshold, a second level value is output for controlling the driving devices which are connected with the infrared lamp for switching off the infrared lamp. Therefore oscillation resistance of a whole control system can be improved.
Description
technical field [0001] The invention relates to the field of camera signal processing, in particular to an infrared camera with an anti-vibration function, an infrared lamp control circuit and a method. Background technique [0002] Currently, in the related art, a photoelectric conversion device is an important part inside a camera. The photoelectric conversion device has the function of amplifying current, but its collector current is not only controlled by the base circuit and current, but also controlled by light radiation. The die of the photoelectric conversion device is a PN junction with photosensitive characteristics and has unidirectional conductivity, so a reverse voltage needs to be applied during operation. In the case of no light irradiation, a small saturated reverse leakage current, that is, dark current, will be generated, and the photoelectric conversion device is turned off at this time. When illuminated by light, the saturated reverse leakage current wi...
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Inventor 温俊阳梁秋芳金升阳
Owner HANGZHOU HIKVISION DIGITAL TECH