CN216531457U - Image pickup mode switching circuit and image pickup mode switching system - Google Patents
Image pickup mode switching circuit and image pickup mode switching system Download PDFInfo
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- CN216531457U CN216531457U CN202122634816.8U CN202122634816U CN216531457U CN 216531457 U CN216531457 U CN 216531457U CN 202122634816 U CN202122634816 U CN 202122634816U CN 216531457 U CN216531457 U CN 216531457U
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Abstract
The application provides a circuit for switching an image pickup mode and a system for switching the image pickup mode. The image pickup mode switching circuit comprises an image pickup switcher, an image sensor and a gray scale conversion circuit; the sensing data end of the image sensor is connected with the image data input end of the camera shooting switcher; the gray level conversion circuit comprises a gray level converter and a contact triode, the gray level output end of the image sensor is connected with the input end of the gray level converter, the output end of the gray level converter is connected with the control end of the contact triode, the first end of the contact triode is connected with the mode switching input end of the camera shooting switcher, the second end of the contact triode is grounded, and the mode switching output end of the camera shooting switcher is used for being connected with the control end of the camera to cut the camera shooting light supplement lamp. The gray scale converter converts and outputs control voltage according to gray scale values in image data to trigger the conduction of the switching triode, so that the camera shooting light supplement lamp of the camera can be switched conveniently, and the probability that the camera is damaged due to damage is reduced.
Description
Technical Field
The present invention relates to the field of camera technologies, and in particular, to a camera mode switching circuit and a camera mode switching system.
Background
At present, a camera usually converts a weak optical image signal into an electrical signal, and then sends the electrical signal to a recording medium such as a video recorder for recording, or transmits the electrical signal through a transmission system or sends the electrical signal to a monitor for displaying.
However, at night or in a dark environment, the conventional camera is easily discovered by lawless persons and is attacked and damaged, so that the damage probability of the camera is increased.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects in the prior art and provides a shooting mode switching circuit and a shooting mode switching system which are convenient for switching shooting supplementary lighting modes so as to reduce the probability of damage caused by attack.
The purpose of the utility model is realized by the following technical scheme:
an image pickup mode switching circuit comprising: a camera switcher, an image sensor, and a gradation conversion circuit; the transmission power supply end of the image sensor is used for being connected with a reference power supply, the sensing data end of the image sensor is connected with the image data input end of the camera shooting switcher, and the sensing data end of the image sensor is also used for receiving image data; the grey scale conversion circuit includes grey scale converter and surely touches the triode, image sensor's grey scale output with grey scale converter's input is connected, grey scale converter's output with the control end of surely touching the triode is connected, surely touch the triode the first end with the mode switch input of the switcher of making a video recording is connected, surely touch the second end ground connection of triode, the mode switch output of the switcher of making a video recording is used for being connected with the control end of camera to the light filling lamp of making a video recording of switching camera.
In one embodiment, the gray scale conversion circuit further includes a first resistor, an output terminal of the gray scale converter is connected to a first terminal of the first resistor, and a second terminal of the first resistor is connected to a control terminal of the cut-contact transistor.
In one embodiment, the gray scale conversion circuit further includes a second resistor, the output terminal of the gray scale converter is connected to a first terminal of the second resistor, and a second terminal of the second resistor is connected to a second terminal of the contact transistor.
In one embodiment, the gray scale conversion circuit further includes a first capacitor, a first terminal of the contact transistor is connected to the first capacitor, and a second terminal of the first capacitor is grounded.
In one embodiment, the image capturing mode switching circuit further includes a low voltage regulator, an input terminal of the low voltage regulator is used for being connected to an external power supply, and an output terminal of the low voltage regulator is connected to a transmission power supply terminal of the image sensor, and is used for providing a reference voltage for the image sensor.
In one embodiment, the image capturing mode switching circuit further includes a second capacitor, a first end of the second capacitor is connected to the input end of the low voltage regulator, and a second end of the second capacitor is grounded.
In one embodiment, the image capturing mode switching circuit further includes a third capacitor, the output terminal of the low voltage regulator is connected to a first terminal of the third capacitor, and a second terminal of the third capacitor is grounded.
In one embodiment, the image capturing mode switching circuit further includes a third resistor, an output terminal of the low voltage regulator is connected to a first terminal of the third resistor, and a second terminal of the third resistor is connected to a transmission power supply terminal of the image sensor.
In one embodiment, the image capturing mode switching circuit further includes a fourth resistor, the output terminal of the low voltage regulator is connected to a first terminal of the fourth resistor, and a second terminal of the fourth resistor is connected to the mode switching input terminal of the image capturing switcher.
An image pickup mode switching system includes the image pickup mode switching circuit according to any of the above embodiments.
Compared with the prior art, the utility model has at least the following advantages:
the image sensor inputs received image data into the gray scale converter, the gray scale converter outputs control voltage according to gray scale value conversion in the image data to trigger the conduction of the switching contact triode, and a conduction trigger signal is fed back to the mode switching input end of the camera shooting switcher conveniently, so that the camera shooting light supplement lamp of the camera is switched conveniently, the camera shooting light supplement mode of the camera is further switched conveniently, and the probability that the camera is damaged due to damage is reduced.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a circuit diagram of an image pickup mode switching circuit according to an embodiment.
Detailed Description
To facilitate an understanding of the utility model, the utility model will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
The present invention relates to an image pickup mode switching circuit. In one embodiment, the image capturing mode switching circuit includes an image capturing switcher, an image sensor, and a gradation conversion circuit. The transmission power supply end of the image sensor is used for being connected with a reference power supply, the sensing data end of the image sensor is connected with the image data input end of the camera shooting switcher, and the sensing data end of the image sensor is also used for receiving image data. The gray scale conversion circuit comprises a gray scale converter and a contact triode. And the gray scale output end of the image sensor is connected with the input end of the gray scale converter. The output end of the gray scale converter is connected with the control end of the contact triode. The first end of the contact cutting triode is connected with the mode switching input end of the image pick-up switcher, and the second end of the contact cutting triode is grounded. And the mode switching output end of the camera shooting switcher is used for being connected with the control end of the camera so as to switch the camera shooting light supplement lamp of the camera. The image sensor inputs received image data into the gray scale converter, the gray scale converter outputs control voltage according to gray scale value conversion in the image data to trigger the conduction of the switching contact triode, and a conduction trigger signal is fed back to the mode switching input end of the camera shooting switcher conveniently, so that the camera shooting light supplement lamp of the camera is switched conveniently, the camera shooting light supplement mode of the camera is further switched conveniently, and the probability that the camera is damaged due to damage is reduced.
Fig. 1 is a circuit diagram of a circuit for switching a shooting mode according to an embodiment of the present invention.
The image pickup mode switching circuit 10 of the embodiment includes an image pickup switch U1, an image sensor U2, and a gradation conversion circuit 100. The transmission power supply end of the image sensor U2 is used for being connected with a reference power supply, the sensing data end of the image sensor U2 is connected with the image data input end of the camera shooting switcher U1, and the sensing data end of the image sensor U2 is also used for receiving image data. The gray scale conversion circuit 100 includes a gray scale converter U3 and a switching transistor Q1. The gray scale output terminal of the image sensor U2 is connected with the input terminal of the gray scale converter U3. The output end of the gray-scale converter U3 is connected with the control end of the switching transistor Q1. The first terminal of the triac Q1 is connected to the mode switching input of the camera switcher U1, and the second terminal of the triac Q1 is grounded. And the mode switching output end of the camera shooting switcher U1 is used for being connected with the control end of the camera so as to switch the camera shooting fill-in light of the camera.
In this embodiment, the image sensor U2 inputs the received image data into the grayscale converter U3, and the grayscale converter U3 outputs a control voltage according to the grayscale conversion in the image data to trigger the conduction of the switching transistor Q1, so as to feed back a conduction trigger signal to the mode switching input terminal of the camera switcher U1, thereby facilitating the switching of the camera fill-in light lamp of the camera, further facilitating the switching of the camera fill-in light mode of the camera, and reducing the damage probability of the camera due to damage.
In one embodiment, referring to fig. 1, the gray scale conversion circuit 100 further includes a first resistor R1, an output terminal of the gray scale converter U3 is connected to a first terminal of the first resistor R1, and a second terminal of the first resistor R1 is connected to a control terminal of the contact transistor Q1. In this embodiment, the first resistor R1 is located between the grayscale converter U3 and the switching transistor Q1, the first resistor R1 is connected in series to the control terminal of the switching transistor Q1, and the first resistor R1 limits the current flowing into the control terminal of the switching transistor Q1, so as to reduce the over-current of the current at the control terminal of the switching transistor Q1, that is, reduce the probability of breakdown due to an excessive current at the control terminal of the switching transistor Q1, thereby ensuring the normal operation of the switching transistor Q1. Furthermore, the first resistor R1 is provided to help stabilize the quiescent operating point of the switching transistor Q1, thereby improving the stability of the quiescent operating point of the switching transistor Q1.
In one embodiment, referring to fig. 1, the gray scale conversion circuit 100 further includes a second resistor R2, an output terminal of the gray scale converter U3 is connected to a first terminal of the second resistor R2, and a second terminal of the second resistor R2 is connected to a second terminal of the contact transistor Q1. In this embodiment, second resistance R2 respectively with cut the control end and the second end connection of touching triode Q1, second resistance R2 will cut the control end and the second end connection of touching triode Q1, second resistance R2 does cut the control end and the second end of touching triode Q1 and provide a shunting loop, second resistance R2 is to the influx cut the electric current of the control end of touching triode Q1 and shunt, in order to avoid inputting when the electric current of the control end of cutting touching triode Q1 has little current fluctuation, will cut and touch triode Q1 misconduction. Thus, when the current at the control terminal of the switching transistor Q1 is small, the current is directed to the common terminal through the second resistor R2, and the probability of the switching transistor Q1 being turned on by mistake is reduced. Only when the current at the control terminal of the switching transistor Q1 is large, the current mainly passes through the control terminal and the second terminal of the switching transistor Q1, so that the operating state of the switching transistor Q1 is stable.
In one embodiment, referring to fig. 1, the gray scale conversion circuit 100 further includes a first capacitor C1, a first terminal of the switching transistor Q1 is connected to the first capacitor C1, and a second terminal of the first capacitor C1 is grounded. In this embodiment, the first capacitor C1 is located at the first end of the switching transistor Q1, the control end of the switching transistor Q1 is configured to receive the output signal of the grayscale converter U3, and determine the grayscale value of the captured image collected by the image sensor U2 according to the output signal, for example, when the grayscale value is greater than 125, the output signal of the grayscale converter U3 is a high-level signal, so that the grayscale converter U3 is in an on state, that is, the grayscale converter U3 is changed from an off state to an amplified state, so that the current at the first end of the grayscale converter U3 is increased, so as to change the voltage at the mode switching input end of the imaging switcher U1 from a low voltage to a high voltage, thereby triggering the switching of the imaging mode of the camera. The first capacitor C1 filters the electrical signal input to the camera switcher U1 to ensure that the electrical signal received at the mode switching input of the camera switcher U1 is stable and free of other external interference signals. In addition, the first capacitor C1 further has a compensation voltage for providing a compensation voltage for the voltage at the mode switching input of the camera switcher U1, that is, when the voltage at the mode switching input of the camera switcher U1 decreases, the compensation voltage is provided on the first capacitor C1 for the mode switching input of the camera switcher U1, which ensures that the voltage at the mode switching input of the camera switcher U1 is stable when the switching transistor Q1 is turned on.
In one embodiment, referring to fig. 1, the image capturing mode switching circuit 10 further includes a low voltage regulator U4, an input terminal of the low voltage regulator U4 is used for being connected to an external power supply, and an output terminal of the low voltage regulator U4 is connected to a transmission power supply terminal of the image sensor U2, and is used for providing a reference voltage for the image sensor U2. In this embodiment, two ends of the low voltage regulator U4 are respectively connected to an external power source and the image sensor U2, and the low voltage regulator U4 drops the voltage of the external power source, so that the voltage output by the low voltage regulator U4 is suitable for the image sensor U2, where a difference between the voltage of the external power source connected to the low voltage regulator U4 and the power supply voltage of the image sensor U2 is small, and therefore, the low voltage regulator U4 is a voltage regulator with a small voltage difference, for example, the low voltage regulator U4 is an LDO (low dropout regulator), specifically, the model is SGM2021-1.8YN3G, so as to convert the external voltage of 3.6V into a direct current voltage of 1.8V suitable for the image sensor U2, and avoid damage to the image sensor U2.
Further, the image capturing mode switching circuit 10 further includes a second capacitor C2, a first end of the second capacitor C2 is connected to the input terminal of the low voltage regulator U4, and a second end of the second capacitor C2 is grounded. In this embodiment, the second capacitor C2 is connected to an input terminal of the low voltage regulator U4, the second capacitor C2 is used as a filter capacitor at the input terminal of the low voltage regulator U4, and the second capacitor C2 performs input filtering on the electrical signal input into the low voltage regulator U4, so as to reduce interference of an external noise signal on the input signal of the low voltage regulator U4, and improve stability of the input signal from the external power supply to the low voltage regulator U4.
Still further, the image capturing mode switching circuit 10 further includes a third capacitor C3, an output terminal of the low voltage regulator U4 is connected to a first terminal of the third capacitor C3, and a second terminal of the third capacitor C3 is grounded. In this embodiment, the third capacitor C3 is connected to the output terminal of the low voltage regulator U4, the third capacitor C3 is used as a filter capacitor at the output terminal of the low voltage regulator U4, and the third capacitor C3 filters the electrical signal input to the transmission power supply terminal of the image sensor U2, so as to reduce the interference of the external noise signal on the input power supply signal of the image sensor U2, and improve the stability of the power supply signal from the external power supply to the image sensor U2.
Still further, the image capturing mode switching circuit 10 further includes a third resistor R3, an output terminal of the low voltage regulator U4 is connected to a first terminal of the third resistor R3, and a second terminal of the third resistor R3 is connected to a transmission power supply terminal of the image sensor U2. In this embodiment, the third resistor R3 is located between the output terminal of the low voltage regulator U4 and the transmission power supply terminal of the image sensor U2, that is, the third resistor R3 is connected in series between the output terminal of the low voltage regulator U4 and the transmission power supply terminal of the image sensor U2, and the third resistor R3 limits the current output by the low voltage regulator U4, so as to reduce the situation that the supply current input by the image sensor U2 is too large, and ensure the normal operation of the image sensor U2.
Furthermore, the image pickup mode switching circuit 10 further includes a fourth resistor R4, an output terminal of the low voltage regulator U4 is connected to a first terminal of the fourth resistor R4, and a second terminal of the fourth resistor R4 is connected to a mode switching input terminal of the image pickup switch U1. In this embodiment, the fourth resistor R4 is located between the output terminal of the low voltage regulator U4 and the mode switching input terminal of the camera switcher U1, that is, the fourth resistor R4 is connected in series between the low voltage regulator U4 and the camera switcher U1, the mode switching input terminal of the camera switcher U1 is connected to the first terminal of the switching transistor Q1, the mode switching input terminal of the camera switcher U1 is further connected to the second terminal of the fourth resistor R4, the voltage at the mode switching input terminal of the camera switcher U1 is pulled up by the output voltage of the low voltage regulator U4, so that the output voltage of the low voltage regulator U4 is prevented from being directly connected to the mode switching input terminal of the camera switcher U1, and when the camera fill-up light mode needs to be switched, the voltage change at the first terminal of the switching transistor Q1 is detected by the mode switching input terminal of the camera switcher U1, so as to improve the detection sensitivity of the mode switching input terminal of the camera switcher U1 to the voltage change of the first terminal of the switching transistor Q1.
In the above embodiments, the grayscale converter is a DSP chip, and the specific model is TMS320F2812 PGFA; the model of the image sensor is C2399_ CSP; the model of the camera shooting switcher is IC-IX-QFN56L-7X7MM, the cutting contact triode is an NPN type triode, the first end of the cutting contact triode is a collector electrode of the NPN type triode, the second end of the cutting contact triode is an emitter electrode of the NPN type triode, and the control end of the cutting contact triode is a base electrode of the NPN type triode.
In one embodiment, the present application further provides an image capturing mode switching system including the image capturing mode switching circuit described in any of the above embodiments. In this embodiment, the image pickup mode switching circuit includes an image pickup switcher, an image sensor, and a gradation conversion circuit. The transmission power supply end of the image sensor is used for being connected with a reference power supply, the sensing data end of the image sensor is connected with the image data input end of the camera shooting switcher, and the sensing data end of the image sensor is also used for receiving image data. The gray scale conversion circuit comprises a gray scale converter and a contact triode. And the gray scale output end of the image sensor is connected with the input end of the gray scale converter. The output end of the gray scale converter is connected with the control end of the contact triode. The first end of the contact cutting triode is connected with the mode switching input end of the image pick-up switcher, and the second end of the contact cutting triode is grounded. And the mode switching output end of the camera shooting switcher is used for being connected with the control end of the camera so as to switch the camera shooting light supplement lamp of the camera. The image sensor inputs received image data into the gray scale converter, the gray scale converter outputs control voltage according to gray scale value conversion in the image data to trigger the conduction of the switching contact triode, and a conduction trigger signal is fed back to the mode switching input end of the camera shooting switcher conveniently, so that the camera shooting light supplement lamp of the camera is switched conveniently, the camera shooting light supplement mode of the camera is further switched conveniently, and the probability that the camera is damaged due to damage is reduced.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. An image pickup mode switching circuit comprising:
a video camera switcher is provided for switching the video camera,
the transmission power supply end of the image sensor is used for being connected with a reference power supply, the sensing data end of the image sensor is connected with the image data input end of the camera shooting switcher, and the sensing data end of the image sensor is also used for receiving image data;
grey level conversion circuit, grey level conversion circuit includes grey level converter and cuts and touches the triode, image sensor's grey level output with grey level converter's input is connected, grey level converter's output with the control end that cuts and touches the triode is connected, cut touch the triode the first end with the mode switch input of the switcher of making a video recording is connected, cut touch the second end ground connection of triode, the mode switch output of the switcher of making a video recording is used for being connected with the control end of camera to the light filling lamp of making a video recording of switching camera.
2. The circuit for switching an image capturing mode according to claim 1, wherein the gradation conversion circuit further includes a first resistor, an output terminal of the gradation converter is connected to a first terminal of the first resistor, and a second terminal of the first resistor is connected to a control terminal of the switching transistor.
3. The image capture mode switching circuit of claim 1, wherein the gamma conversion circuit further comprises a second resistor, wherein an output terminal of the gamma converter is connected to a first terminal of the second resistor, and a second terminal of the second resistor is connected to a second terminal of the switching transistor.
4. The image capture mode switching circuit of claim 1, wherein the gamma conversion circuit further comprises a first capacitor, a first terminal of the switching transistor is connected to the first capacitor, and a second terminal of the first capacitor is connected to ground.
5. The circuit of claim 1, further comprising a low voltage regulator, an input of the low voltage regulator being connected to an external power source, and an output of the low voltage regulator being connected to the transmission power supply of the image sensor for providing a reference voltage to the image sensor.
6. The circuit of claim 5, further comprising a second capacitor, wherein a first terminal of the second capacitor is connected to the input terminal of the low voltage regulator, and a second terminal of the second capacitor is grounded.
7. The circuit of claim 5, further comprising a third capacitor, wherein the output terminal of the low voltage regulator is connected to a first terminal of the third capacitor, and a second terminal of the third capacitor is grounded.
8. The circuit of claim 5, further comprising a third resistor, wherein the output terminal of the low voltage regulator is connected to a first terminal of the third resistor, and a second terminal of the third resistor is connected to the transmission power supply terminal of the image sensor.
9. The circuit of claim 5, further comprising a fourth resistor, wherein the output of the low voltage regulator is connected to a first terminal of the fourth resistor, and a second terminal of the fourth resistor is connected to the mode switch input of the video switcher.
10. An image pickup mode switching system characterized by comprising the image pickup mode switching circuit according to any one of claims 1 to 9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202122634816.8U CN216531457U (en) | 2021-10-28 | 2021-10-28 | Image pickup mode switching circuit and image pickup mode switching system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202122634816.8U CN216531457U (en) | 2021-10-28 | 2021-10-28 | Image pickup mode switching circuit and image pickup mode switching system |
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| CN216531457U true CN216531457U (en) | 2022-05-13 |
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| CN202122634816.8U Active CN216531457U (en) | 2021-10-28 | 2021-10-28 | Image pickup mode switching circuit and image pickup mode switching system |
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