Police photo-taking light circuit
A circuit and police technology, applied in the field of police photo lamp circuits, can solve the problems of affecting the image shooting effect and poor current stability of the police photo lamp, so as to solve the current instability, improve the reliability, and facilitate the programming of control programs. Effect
Active Publication Date: 2011-04-06
OCEANS KING LIGHTING SCI&TECH CO LTD +1
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Problems solved by technology
[0003] The technical problem to be solved by the present invention is to provide a police photo light circuit for the defects of the existing technology, such as the poor current stability of the police photo light, which affects the image shooting effect, etc.
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[0019] Such as figure 1 and 2 As shown, in an embodiment of the police photo light circuit of the present invention, it includes: an interface terminal connected to a power supply, a control output port for controlling the operation of the photo light, and a control port for controlling the power supply to supply power to the photo light Circuit, the inventive point of this technical solution is that the control circuit can be a single-chip microcomputer control circuit 401, so different peripheral circuits can be added to it through different pins, which enhances the intelligent effect of the police photo light circuit, and can be used in the power supply. A switch circuit 100 is also arranged between the interface end and the single-chip control circuit 401, so as to control the conduction or shutdown effect of the switch circuit 100, thereby further controlling the power supply of the power supply to the single-chip control circuit 401; The circuit 401 is also connected wi...
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The invention relates to a police photo-taking light circuit. The police photo-taking light circuit comprises an interface port used for connecting a power supply, and a control circuit used for controlling an output port and used for controlling the power supply to supply power to a photo-taking light, wherein the control circuit is a singlechip control circuit; a switching circuit is also arranged between the power supply and the singlechip control circuit and is used for connecting or disconnecting power supply to the singlechip control circuit by the power supply; the switching circuit comprises a plurality of switches connected in parallel between the interface port of the power supply and the singlechip control circuit, and a plurality of protective resistors; and one end of each switch is connected with the interface port of the power supply and the other end is connected to a control pin of a singlechip in the singlechip control circuit respectively and is also grounded through a protective resistor to control the corresponding pin of the singlechip in a low-level state. The police photo-taking light circuit guarantees that the corresponding pin in the singlechip control circuit is in the low-level state and improves the reliability of the circuit.
Description
technical field [0001] The present invention relates to a camera light circuit, more specifically, to a police photo light circuit. Background technique [0002] The police photo light is used in conjunction with the camera to take fingerprints at the scene of the crime. The police photo light is equipped with multiple light sources of different colors and can emit different light wave bands. When taking fingerprints, according to the shooting environment, light sources of different colors and different light wave bands are used for irradiation, so as to obtain the best fingerprint image. However, the current police photo light circuit is poor in current stability. Whenever the power supply current fluctuates, the light frequency and brightness of the light source will be unstable, which will affect the fingerprint print. It is often not clear, which directly affects the detection of the case. Therefore, it is necessary to improve the police photo light circuit. Contents...
Claims
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IPC IPC(8): H05B37/02G03B15/05
Inventor 周明杰戴雪维
Owner OCEANS KING LIGHTING SCI&TECH CO LTD