WO2020224619A1 - 摄像机 - Google Patents

摄像机 Download PDF

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Publication number
WO2020224619A1
WO2020224619A1 PCT/CN2020/089017 CN2020089017W WO2020224619A1 WO 2020224619 A1 WO2020224619 A1 WO 2020224619A1 CN 2020089017 W CN2020089017 W CN 2020089017W WO 2020224619 A1 WO2020224619 A1 WO 2020224619A1
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WO
WIPO (PCT)
Prior art keywords
light
chip
camera
sampling
port
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Application number
PCT/CN2020/089017
Other languages
English (en)
French (fr)
Inventor
薛海涛
Original Assignee
杭州海康威视数字技术股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by 杭州海康威视数字技术股份有限公司 filed Critical 杭州海康威视数字技术股份有限公司
Priority to EP20801763.2A priority Critical patent/EP3907982B1/en
Publication of WO2020224619A1 publication Critical patent/WO2020224619A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
    • H04N7/183—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast for receiving images from a single remote source
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/70—Circuitry for compensating brightness variation in the scene
    • H04N23/73—Circuitry for compensating brightness variation in the scene by influencing the exposure time
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/70—Circuitry for compensating brightness variation in the scene
    • H04N23/71—Circuitry for evaluating the brightness variation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/70—Circuitry for compensating brightness variation in the scene
    • H04N23/74—Circuitry for compensating brightness variation in the scene by influencing the scene brightness using illuminating means
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/10—Controlling the intensity of the light
    • H05B45/12—Controlling the intensity of the light using optical feedback
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/30—Driver circuits
    • H05B45/32—Pulse-control circuits
    • H05B45/325—Pulse-width modulation [PWM]
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
    • H05B47/10—Controlling the light source
    • H05B47/105—Controlling the light source in response to determined parameters
    • H05B47/115—Controlling the light source in response to determined parameters by determining the presence or movement of objects or living beings
    • H05B47/125—Controlling the light source in response to determined parameters by determining the presence or movement of objects or living beings by using cameras
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
    • Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection

Definitions

  • This application relates to the technical field of video surveillance, and in particular to a camera.
  • supplementary light is generally used to supplement the light of the camera to enhance the night image monitoring effect.
  • the application scenarios of video surveillance are developing in a diversified and detailed direction, and the requirements for camera supplementary light technology are getting higher and higher.
  • the commonly used supplementary lights are divided into two types: infrared supplementary lights and white supplementary lights, that is, infrared supplementary lights or white supplementary lights are used for supplementary light, so as to meet the monitoring needs under low illumination at night.
  • infrared or white light is used to fill light, and the color of the fill light is relatively single.
  • the picture contrast is poor, which does not meet the needs of intelligent picture recognition; and because white light is visible light that human eyes can perceive,
  • white light to fill light at night has poor concealment, which will interfere with the human eye and pose safety risks to scenes such as road monitoring.
  • the current camera's fill light effect is poor.
  • the purpose of the embodiments of the present application is to provide a camera to improve the light supplement effect of the camera.
  • an embodiment of the present application discloses a video camera, including:
  • the supplementary light is configured with at least two light-emitting chips, and the supplementary light is used to emit at least two supplementary light rays of different wavelengths, wherein each light-emitting chip is configured to be connected to its corresponding driving module; the driving module is It is configured to receive the PWM signal sent by the processor chip, thereby driving the corresponding light-emitting chip to emit supplementary light;
  • the image sensor is configured to sense the fill light emitted by the fill light and generate an image
  • the memory is configured to store a preset data table, where the data table indicates the correspondence between the preset brightness value and the at least two PWM signals;
  • At least two new PWM signals are output to the driving module to drive the fill light to emit fill light.
  • the camera provided by the embodiment of the application includes: a fill light, at least two drive modules, an image sensor, a memory, and a processor chip.
  • the fill light is configured with at least two light-emitting chips, and the fill light is used to emit at least two different Wavelength supplementary light, wherein each of the light-emitting chips is respectively configured to be connected to their corresponding driving module, and the driving module is configured to receive the PWM signal sent by the processor chip, so as to drive the corresponding light-emitting chip to emit the supplementary light;
  • the image sensor is configured to sense the fill light emitted by the fill light and generate an image;
  • the memory is configured to store a preset data table, the data table indicating the correspondence between the preset brightness value and at least two PWM signals Relationship; processor chip, used to execute: obtain a current image from the image sensor, calculate the actual brightness value of the current image; based on the actual brightness value, determine the first preset brightness value and the first preset brightness value from the data table At least two new P
  • hybrid fill light is used, that is, fill light supports multiple The fill light of different wavelengths realizes that the PWM signal corresponding to the fill light of different wavelengths is used to control the light emission of the fill light according to the actual environmental requirements, thereby improving the fill light effect of the camera.
  • Fig. 1 is a schematic structural diagram of a camera according to an embodiment of the present application.
  • FIG. 2 is a schematic structural diagram of a camera according to another embodiment of the present application.
  • FIG. 3 is a schematic diagram of a supplementary light process of a camera according to an embodiment of the present application.
  • FIG. 4 is a schematic diagram of a supplementary light flow of a camera according to another embodiment of the present application.
  • Fig. 5 is a schematic diagram of a driving module of a camera according to an embodiment of the present application.
  • FIG. 6 is a schematic diagram of the structure of the fill light of the camera of the embodiment of the present application.
  • FIG. 7 is a schematic diagram of a package structure of a light supplement lamp of a camera according to an embodiment of the present application.
  • FIG. 8 is a schematic diagram of the infrared light-emitting waveband of the camera of the embodiment of the present application.
  • FIG. 9 is a schematic diagram of the blue light emission band of the camera of the embodiment of the present application.
  • Fig. 10 is a schematic diagram of a photosensitive sampling circuit of a camera according to an embodiment of the present application.
  • the camera provided in the embodiment of the present application is applied in a video surveillance scene, and supplements light for the camera in a low-illumination environment such as night.
  • the fill light can emit at least two fill light rays of different wavelengths.
  • the fill light rays of different wavelengths emitted by the fill light lamp that is, the use of mixed fill light can be realized according to actual conditions.
  • the environment requires the use of PWM signals corresponding to different wavelengths of the fill light to control the fill light to emit light, and the camera has a better fill light effect, thereby improving the camera's monitoring quality.
  • the camera in the embodiment of the present application includes the following modules:
  • Image sensor is a device that converts optical images into electronic signals
  • Processor chip it can perform digital image processing, encoding compression and common external interface function control, and it can be a system-on chip (SOC for short);
  • Supplementary light such as LED supplementary light
  • Drive module refers to the drive chip of the fill light, which is used to control the light of the fill light.
  • Each light-emitting chip of the fill light corresponds to a drive module; from Figure 1, it can be seen that a fill light has multiple drive modules , Respectively used to control the fill light of one wavelength of the fill light, each driving module is controlled by a PWM signal.
  • a camera has 3 fill lights, and each fill light can emit two kinds of light. It includes three groups of drive modules, each group contains two drive modules, and each group of drive modules controls one fill light.
  • the module is controlled by a PWM signal to drive the fill light to emit fill light of different wavelengths. Among them, the PWM signal is used to adjust the current output by the drive module to control the brightness of the fill light;
  • Photosensitive sampling module perform digital sampling of photosensitive signals to obtain sampling signals
  • Photosensitive element a sensor that outputs different analog levels according to changes in light intensity.
  • the fill light can emit at least two different wavelengths of fill light, for example, a red and blue hybrid fill light, which integrates a red light emitting chip and a blue light emitting chip.
  • the camera includes: a fill light, which is configured with at least two light-emitting chips, the fill light is used to emit at least two fill light rays of different wavelengths, wherein each light-emitting chip is configured to correspond to each
  • the drive module is connected; the drive module is configured to receive the PWM signal sent by the processor chip, so as to drive the corresponding light-emitting chip to emit supplementary light;
  • An image sensor configured to sense the fill light emitted by the fill light, and generate an image
  • the memory is configured to store a preset data table, where the data table indicates the correspondence between the preset brightness value and the at least two PWM signals;
  • the processor chip is used to execute: obtain a current image from the image sensor and calculate the actual brightness value of the current image; based on the actual brightness value, determine the first preset brightness value and the first preset brightness value from the data table Corresponding to at least two new PWM signals; output at least two new PWM signals to the drive module for driving the fill light to emit fill light.
  • the fill light is equipped with at least two light-emitting chips, that is, two light-emitting chips are arranged inside the fill light, and each light-emitting chip can emit light of different wavelengths, for example, light of at least two colors , Such as red light and blue light, or infrared light and blue light of different wavelengths.
  • the fill light can be an LED light.
  • the driving module is connected to the light-emitting chip one-to-one, that is to say, a light-emitting chip is connected to a corresponding driving module.
  • the driving module can receive the PWM signal sent by the processor chip, and based on the PWM signal, generate electricity for driving the light-emitting chip to emit light. Signal, the driving module sends the generated electrical signal to the correspondingly connected light-emitting chip, and drives the light-emitting chip to emit supplementary light.
  • the data table indicates the corresponding relationship between the preset brightness value and at least two PWM signals. Therefore, the preset brightness value and the corresponding at least two PWM signals can be directly recorded in the data table, or the preset brightness value can be recorded in the data table. The brightness value and the corresponding duty cycle of at least two PWM signals.
  • the processor chip can specifically output at least two new PWM signals to the drive module through the digital I/O port.
  • the PWM signal can be considered as a digital signal, and the processor chip can also output at least two through a clock interface, an analog signal interface, etc.
  • the new PWM signal is sent to the drive module.
  • the PWM signal can be considered as a high and low level electrical signal, an analog signal, etc.
  • the camera further includes: a photosensitive sampling module and a photosensitive element connected in sequence; the photosensitive sampling module is connected to the input interface of the processor chip; the photosensitive sampling module is used to perform processing according to the level signal output by the photosensitive element Sampling to obtain sampled signals;
  • the processor chip is also used to determine whether the supplementary light needs to be turned on according to the sampling signal output by the photosensitive sampling module; if it is determined that the supplementary light needs to be turned on, output a PWM signal to the driving module corresponding to each light-emitting chip.
  • the level signal output by the photosensitive element can be sampled according to the photosensitive sampling module in the camera.
  • the output sampling signal is determined.
  • the level of the sampling signal of the photosensitive sampling module is compared with a preset level threshold. If it is greater than the preset level threshold, it means that the light brightness of the external environment does not meet the requirements. It is determined that the fill light needs to be turned on.
  • the PWM signals corresponding to the fill light of different wavelengths are output to the corresponding drive module, and the drive module controls the fill light to emit light according to the PWM signal, where the duty cycle of the PWM signal is The preset duty cycle, or the duty cycle after the previous adjustment.
  • the image sensor senses the fill light emitted by the fill light and obtains the current image, and then determines the actual brightness value of the current image through the processor chip, and determines whether to adjust the fill light brightness of the fill light according to the actual brightness value.
  • the way the processor chip determines the first preset brightness value may specifically include: looking up a data table, and determining the first preset brightness value in the data table, wherein the deviation between the first preset brightness value and the actual brightness value is less than the first preset brightness value.
  • a preset threshold may specifically include: looking up a data table, and determining the first preset brightness value in the data table, wherein the deviation between the first preset brightness value and the actual brightness value is less than the first preset brightness value.
  • the first preset brightness value corresponding to the actual brightness value in Table 1 according to the actual brightness value, that is, look up the brightness value closest to the actual brightness value in Table 1 (that is, the deviation is less than the first preset threshold) For example, if the actual brightness value is a, which is the closest to B3 in Table 1, then it is determined that B3 is the first preset brightness value, and then the duty cycle of the PWM signal corresponding to the first preset brightness value is determined as red light. 80%, blue 90%, two PWM signals are respectively output to two driving modules, and the two driving modules control the corresponding light-emitting chips to emit different fill light rays.
  • the brightness in Table 1 may be data obtained by setting the aperture size to a fixed value, and different duty cycles of supplementary light of different wavelengths correspond to different brightness values, such as A1, A2, etc.
  • the fill light control ends.
  • processor chip is also configured as:
  • the first preset brightness value and at least two new PWM signals corresponding to the first preset brightness value are determined.
  • a driving module is connected to a light-emitting chip. After the driving module receives the PWM signal sent by the processor chip, it will correspondingly drive the light-emitting chip connected to the driving module to emit supplementary light. There is a corresponding relationship between the module, the PWM signal and the fill light. In addition, the image is generated through the perception of the supplemental light. Therefore, there is also a corresponding relationship between the generated image and the light-emitting chip, the driving module, the PWM signal, and the supplemental light.
  • the duty ratio of the PWM signal of one fill light corresponding to the current image is 70%
  • the duty ratio of the PWM signal of the other fill light is 80%
  • determine the corresponding brightness value namely the second preset brightness value C4
  • the fill light brightness of the fill light needs to be adjusted, that is, the first preset brightness value and the first preset brightness value are determined.
  • processor chip is also configured as:
  • the fill light brightness of the fill light is not adjusted, that is, no new PWM signal is generated .
  • the first preset threshold and the second preset threshold may be determined according to actual conditions.
  • an image processing (Image Signal Processor, ISP) algorithm can also be used to determine whether to adjust the brightness of the fill light according to the actual brightness value.
  • ISP Image Signal Processor
  • the processor chip is also used to: if the level of the sampling signal output by the photosensitive sampling module is less than a preset level threshold, control the fill light to turn off.
  • the photosensitive element and photosensitive sampling module in the camera perform real-time sampling of the brightness of the external light. If the level of the sampling signal is less than the preset level threshold, indicating that the brightness of the external environment meets the requirements, the fill light is turned off. No fill light.
  • the camera of this embodiment includes: a fill light, at least two drive modules, an image sensor, a memory, and a processor chip.
  • the fill light is configured with at least two light-emitting chips, and the fill light is used to emit at least two different wavelengths.
  • Complementary light wherein each of the light-emitting chips is respectively configured to be connected to their corresponding drive module, and the drive module is configured to receive the PWM signal sent by the processor chip, thereby driving the corresponding light-emitting chip to emit the complementary light
  • image sensor Configured to sense the fill light emitted by the fill light and generate an image
  • the memory is configured to store a preset data table, the data table indicating the correspondence between the preset brightness value and the at least two PWM signals;
  • the processor chip is used to execute: obtain a current image from the image sensor and calculate the actual brightness value of the current image; based on the actual brightness value, determine the first preset brightness value and the first preset brightness value from the data table Corresponding to at least two new P
  • hybrid fill light is used, that is, the fill light supports multiple different wavelengths
  • the corresponding PWM signals of different wavelengths of the fill light are used to control the light emission of the fill light, which improves the fill light effect of the camera and improves the monitoring quality of the camera.
  • the manner in which the processor chip determines at least two new PWM signals may include:
  • the data table is looked up based on the first preset brightness value, and the duty cycle of the new first PWM signal and the duty cycle of the new second PWM signal corresponding to the first preset brightness value are determined.
  • the first fill light is red light
  • the second fill light is blue light
  • the first preset brightness value is determined to be C6.
  • the duty ratio of the new PWM signal corresponding to the fill light is 50%
  • the duty ratio of the new PWM signal corresponding to the second fill light is 80%.
  • processor chip executes to output the at least two new PWM signals to the driving module, it may be specifically used for:
  • the duty cycle of the first PWM signal is different from the duty cycle of the current PWM signal corresponding to the first supplemental light, outputting the first PWM signal to the driving module corresponding to the light-emitting chip that emits the first supplementary light;
  • the second PWM signal is output to the driving module corresponding to the light-emitting chip that emits the second supplementary light.
  • the driving module is still driven according to the current PWM signal to control the light-emitting chip to emit light.
  • the duty cycle of the new first PWM row corresponding to the light is different from the current duty cycle, and the driving module is driven according to the first PWM signal to control the light-emitting chip to emit light.
  • the implementation principle of the second supplementary light is similar.
  • the first fill light is red light
  • the second fill light is blue.
  • the first preset brightness value is determined to be C6
  • the first fill light corresponds to the new PWM
  • the duty cycle of the signal is 50%
  • the duty cycle of the new PWM signal corresponding to the second fill light is 80%.
  • the duty cycle of the current PWM signal of the current image is 70% and 80% respectively. Therefore, only the PWM signal corresponding to the second supplementary light needs to be adjusted.
  • the first supplementary light still drives the driving module through the current PWM signal, and the driving module controls the corresponding Of light-emitting chips glow.
  • the PWM signals corresponding to different fill light rays are determined according to the first preset brightness value corresponding to the actual brightness value, so that the PWM signals corresponding to various fill light rays are determined Control the light emitted by the fill light for exposure to avoid overburdening the image.
  • the lighting of the fill light is controlled by the duty cycle parameters of the fill light of a variety of different wavelengths, which realizes that the PWM signal corresponding to different lights is used to control the lighting of the fill light according to actual environmental requirements. Good, so as to improve the monitoring quality of the camera and meet the needs of intelligent identification.
  • the supplementary light control starts, step 301, the photosensitive sampling signal is read, that is, the processor chip reads the sampling signal output by the photosensitive sampling module.
  • Step 302 Determine whether the sampling signal is greater than the threshold, if yes, execute step 303, if otherwise, return to execute step 301.
  • Step 303 Control the fill light to emit light according to the initial value of the duty cycle of the PWM signal.
  • Step 304 The light supplement algorithm determines whether the brightness of the supplement light needs to be adjusted. For the specific process, refer to the foregoing embodiment or the embodiment shown in FIG. 4. If yes, proceed to step 305, if otherwise, the fill light control is completed.
  • Step 305 check the table for verification;
  • Step 306 determine the PWM duty cycle adjustment scheme, for example, determine the duty cycle of the PWM signal corresponding to the various fill light rays of different wavelengths corresponding to the actual brightness value according to the corresponding relationship in Table 1. , As the duty ratio of the PWM signal corresponding to the adjusted fill light of different wavelengths.
  • step 101 the image sensor controls the light emitted by the fill light to perform exposure according to the initial value of the duty cycle of the PWM signal, and obtain an image.
  • step 102 Generate the actual brightness value of the first exposure, that is, determine the actual brightness value of the current image acquired by the image sensor.
  • step 103 Determine whether the acquired image is overexploded, for example, determine whether the image is overexploded according to an ISP algorithm. If yes, proceed to step 105, determine to adjust the brightness of the supplement light, and continue to perform steps 305 to step 306 in FIG. 3; if not, proceed to step 104, determine not to adjust the brightness of the supplement light, and then the supplement light control is completed.
  • the driving module includes:
  • the first port (pin 4) of the driver chip is connected to an output port of the processor chip
  • the second port (pin 5) of the driver chip is connected to the power supply;
  • the third port (pin 6) of the driving chip is respectively connected to the first end of the first sampling resistor and the fill light; the second end of the first sampling resistor is connected to the power supply;
  • a current signal is output, and the current signal is used to control the emission of the supplementary light of a wavelength of the supplementary light.
  • the drive module also includes:
  • the fourth port (pin 1) of the driving chip is respectively connected to the first end of the inductor and the first end of the freewheeling diode; the second end of the inductor is connected to the fill light; the second end of the freewheeling diode is connected to the power supply;
  • the second port (pin 5) of the driver chip is also connected to the first end of the first capacitor, and the second end of the first capacitor is grounded;
  • the first branch and the second branch of the third port (pin 6) of the driver chip are respectively connected to both ends of the second capacitor.
  • FIG. 5 a schematic diagram of a driving module is shown in FIG. 5, and the driving circuit module is introduced as follows:
  • UR2 is a driver chip, such as an LED constant current driver chip.
  • a current value set according to the first sampling resistor RRn can be output.
  • the current output is constant, and the driver chip can be based on the load. The changes are adjusted to achieve a constant current output.
  • Pin 1 is the inductor pin, which is connected to inductor LR2 for rectification output, and DRn is a freewheeling diode, which provides energy for the negative cycle of inductor rectification.
  • Terminals 1 and 2 are anode and cathode respectively.
  • Pin 2 (GND) is the ground pin.
  • Pin 3 (TM) is the test mode pin, this pin can be directly grounded in practical applications.
  • Pin 4 is the enable and dimming pin, which can be directly pulled high to enable the chip; the PWMRn signal in Figure 7 is output from the processor chip to the driver chip for dimming control.
  • the maximum value of the adjusted current is the maximum value set by the first sampling resistor. For example, if the duty cycle of the PWM signal is 20%, the current output by the driving chip is 20% of the maximum value set by the first sampling resistor.
  • Pin 5 is the power input pin, which is suspiciously connected to the DC12V power supply.
  • the first capacitor CRn is the input capacitor of the power supply for power supply filtering.
  • Pin 6 is the current sampling pin, connected to the first sampling resistor RRn, and the output current value is calculated through the first sampling resistor. This current value is the maximum output current value set by the hardware; and the second capacitor CR12 is The output capacitor is used to filter the output drive current signal.
  • the fill light (the positive and negative poles of the LED lamp corresponding to the fill light of a wavelength) between the drive output LEDRn+ and LEDRn- to drive and light up.
  • the brightness of the fill light is changed by the output current change; and the output The current is changed by the high-level time change of the PWMRn signal of the processor chip, that is, the duty cycle changes.
  • the supplementary light includes at least two LED lamps, each LED lamp includes a light-emitting chip, and two ends of each LED lamp are respectively connected to the first branch and the second branch of the third port of the corresponding driving chip.
  • pins 1 and 6 are used for heat dissipation
  • pins 2 and 3 are cathodes
  • pins 4 and 5 are anodes.
  • the fill light also includes an encapsulation structure
  • At least two LED lights are arranged in the packaging structure; the LED lights correspond to one drive module;
  • the packaging structure includes at least two first interfaces and at least two second interfaces;
  • the first end of the first interface is connected to the positive electrode of the corresponding LED lamp, and the first end of the second interface is connected to the negative electrode of the corresponding LED lamp;
  • the second end of the first interface is connected to the first branch of the third port of the corresponding driver chip; the second end of the second interface is connected to the second branch of the third port of the corresponding driver chip.
  • the packaging structure further includes at least one third interface, and the third interface is used for heat dissipation.
  • FIG. 7 it is the packaging structure of the fill light.
  • the width of the packaging structure in Figure 7 is 5 ⁇ 0.05mm, and the diameter ⁇ of the fill light is 4.4mm.
  • the size in Figure 7 is only an example. This application is not limited to this.
  • 1 and 6 are the third interfaces for heat dissipation; 4 and 5 are the first interfaces, 2 and 3 are the second interfaces, or 2 and 3 are the first interfaces, and 4 and 5 are the second interfaces.
  • the center wavelength of the red light is 730 nm, and the effective spectral bandwidth at both ends are respectively about 50 nm.
  • the center wavelength of the blue light is 460 nm, and the effective spectral bandwidth at both ends is about 30 nm.
  • the photosensitive sampling module includes:
  • the first end of the second sampling resistor is respectively connected to the output end of the photosensitive element and the first end of the third sampling resistor; the second end of the second sampling resistor is grounded;
  • the second end of the third sampling resistor serves as the output end of the photosensitive sampling module and is connected to the input interface of the processor chip.
  • the CDS1 signal is the signal output by the photosensitive element, and its level changes according to the brightness of the photosensitive element.
  • the second sampling resistor R132 and the third sampling resistor R130 perform resistance sampling, and CDS is the processor.
  • the sampling input interface of the chip judges whether the sampling signal reaches the threshold value that satisfies the condition through the level change of the input sampling signal, that is, meets the threshold value of turning on or off the supplement light, and controls the turn on and off of the supplement light.
  • An embodiment of the present application may also provide a video surveillance system, including the camera as in any of the foregoing embodiments.
  • the embodiment of the present application also provides a camera light supplement circuit, and the camera light supplement circuit includes:
  • At least two LED lights at least one of the at least two LED lights is used to emit red light, and the other LED light is used to emit blue light, and infrared and blue light are used to fill the camera with light;
  • the photosensitive sensor component is used to generate the level sampling signal of the ambient light
  • the processor is electrically connected to the photosensitive sensor assembly, and is configured to determine to turn on at least two LED lights when it is determined that the level sampling signal is higher than the preset value, and generate at least two PWM signals in response to turning on the at least two LED lights;
  • the driving circuit is electrically connected to the processor and used for driving at least two LED lights based on the received at least two PWM signals.
  • the photosensitive sensor assembly includes:
  • Photosensitive element used to perceive ambient light
  • the photosensitive sampling circuit is electrically connected with the photosensitive element, and is used to sample the level signal output by the photosensitive element to generate a level sampling signal.
  • the photosensitive sampling circuit includes:
  • the first end of the second sampling resistor is respectively connected to the output end of the photosensitive element and the first end of the third sampling resistor; the second end of the second sampling resistor is grounded;
  • the second end of the third sampling resistor serves as the output end of the photosensitive sampling circuit and is connected to the input interface of the processor.
  • the drive circuit includes: a drive chip, a first sampling resistor and a power supply;
  • the first port of the driver chip is connected to an output port of the processor
  • the second port of the driver chip is connected to a power source
  • the third port of the driving chip is respectively connected to the first end of the first sampling resistor and the light-emitting chip in any LED lamp; the second end of the first sampling resistor is connected to the power source;
  • the driving chip is used to output a current signal to the connected light-emitting chip according to the first sampling resistor and the PWM signal output by the processor, so as to control the connected light-emitting chip to emit red light or blue light.
  • the driving circuit further includes: an inductor, a freewheeling diode, a first capacitor, and a second capacitor;
  • the fourth port of the driver chip is respectively connected to the first end of the inductor and the first end of the freewheeling diode; the second end of the inductor is connected to the LED lamp; the second end of the freewheeling diode is connected to the power supply;
  • the second port of the driver chip is also connected to the first end of the first capacitor, and the second end of the first capacitor is grounded;
  • the first branch and the second branch of the third port of the driving chip are respectively connected to two ends of the second capacitor.
  • each of the at least two LED supplementary lights includes a light emitting chip, and two ends of each LED lamp are respectively connected to the first branch and the second branch of the third port of the corresponding driving chip.
  • At least two LED lights are arranged in the packaging structure; the LED lights correspond to one drive circuit;
  • the packaging structure includes at least two first interfaces and at least two second interfaces;
  • the first end of the first interface is connected to the positive electrode of the corresponding LED lamp, and the first end of the second interface is connected to the negative electrode of the corresponding LED lamp;
  • the second end of the first interface is connected to the first branch of the third port of the corresponding driver chip; the second end of the second interface is connected to the second branch of the third port of the corresponding driver chip.
  • the packaging structure further includes at least one third interface, and the third interface is used for heat dissipation.
  • the implementation principles and technical effects of the camera's supplementary light circuit are the same as or similar to those of the cameras in the foregoing embodiments, and will not be repeated here.
  • An embodiment of the present application also provides a camera, which includes: a fill light, at least two drive modules, an image sensor, a memory, and a processor chip;
  • the supplementary light includes at least two light-emitting chips, each light-emitting chip is respectively connected to the output port of its corresponding drive module, each light-emitting chip is used to emit supplementary light, and the wavelength of the supplementary light emitted by each light-emitting chip is different;
  • the input port of the driving module is connected with the output port of the processor chip, and the driving module is used to receive the PWM signal sent by the processor chip, and drive the connected light-emitting chip to emit supplementary light based on the PWM signal;
  • the image sensor is used to sense the fill light emitted by the fill light and generate an image
  • a memory for storing a preset data table, where the data table indicates the correspondence between the preset brightness value and at least two PWM signals;
  • the image sensor and memory are connected to the input ports of the processor chip.
  • the processor chip is used to obtain the current image from the image sensor and the data table from the memory. If it is determined that the brightness of the fill light needs to be adjusted, it will be based on the actual brightness of the current image Value, at least two new PWM signals are correspondingly found from the data table, and at least two new PWM signals are output to the corresponding drive modules.
  • the image sensor finds the second preset brightness value from the data table based on the corresponding PWM signal of each light-emitting chip corresponding to the current image; if the actual brightness value If the deviation from the second preset brightness value is greater than the second preset threshold, it is determined that the brightness of the fill light needs to be adjusted.
  • the processor chip has the functions of looking up the table and judging whether it is necessary to adjust the brightness of the fill light. It can find at least two new PWM signals, and output the found new PWM signals to the drive module.
  • the connected light-emitting chip can be driven based on the PWM signal to emit supplementary light.
  • the drive module includes: a drive chip, a first sampling resistor and a power supply;
  • the first port of the driver chip is connected to an output port of the processor chip
  • the second port of the driver chip is connected to a power source
  • the third port of the driving chip is respectively connected to the first end of the first sampling resistor and one of the light-emitting chips of the fill light; the second end of the first sampling resistor is connected to the power source;
  • the driving chip is used for outputting a current signal to the connected light-emitting chip according to the PWM signal output by the first sampling resistor and the processor chip, so as to control the connected light-emitting chip to emit supplementary light of one wavelength.
  • the driving module further includes: an inductor, a freewheeling diode, a first capacitor, and a second capacitor;
  • the fourth port of the driver chip is respectively connected to the first end of the inductor and the first end of the freewheeling diode; the second end of the inductor is connected to the fill light; the second end of the freewheeling diode is connected to the power supply;
  • the second port of the driver chip is also connected to the first end of the first capacitor, and the second end of the first capacitor is grounded;
  • the first branch and the second branch of the third port of the driving chip are respectively connected to two ends of the second capacitor.
  • the supplemental light includes at least two LED lamps, each LED lamp includes a light-emitting chip, and two ends of each LED lamp are respectively connected to the first branch and the second branch of the third port of the corresponding driving chip.
  • the fill light also includes a packaging structure
  • At least two LED lights are arranged in the packaging structure; the LED lights correspond to one drive module;
  • the packaging structure includes at least two first interfaces and at least two second interfaces;
  • the first end of the first interface is connected to the positive electrode of the corresponding LED lamp, and the first end of the second interface is connected to the negative electrode of the corresponding LED lamp;
  • the second end of the first interface is connected to the first branch of the third port of the corresponding driver chip; the second end of the second interface is connected to the second branch of the third port of the corresponding driver chip.
  • the packaging structure further includes at least one third interface, and the third interface is used for heat dissipation.
  • the camera further includes: a photosensitive sampling module and a photosensitive element connected in sequence;
  • the photosensitive sampling module is connected with the input interface of the processor chip;
  • the photosensitive sampling module is used for sampling according to the level signal output by the photosensitive element to obtain the sampling signal
  • the processor chip is also used to determine whether the fill light needs to be turned on according to the sampling signal output by the photosensitive sampling module; if it is determined that the fill light needs to be turned on, it outputs PWM signals to the driving modules corresponding to each light-emitting chip.
  • the photosensitive sampling module includes: a second sampling resistor and a third sampling resistor;
  • the first end of the second sampling resistor is respectively connected to the output end of the photosensitive element and the first end of the third sampling resistor; the second end of the second sampling resistor is grounded;
  • the second end of the third sampling resistor serves as the output end of the photosensitive sampling module and is connected to the input interface of the processor chip.
  • the at least two complementary light rays of different wavelengths include: red light and blue light.
  • the program can be stored in a computer-readable storage medium, which is referred to herein as Storage media, such as ROM/RAM, magnetic disks, optical disks, etc.

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Abstract

本申请实施例提供了一种摄像机。该摄像机包括：补光灯，被配置有至少两个发光芯片，补光灯用于发出至少两个不同波长的补光光线，各个发光芯片分别被配置与各自对应的驱动模块连接，驱动模块被配置为接收处理器芯片发送的PWM信号；存储器被配置为存储预设亮度值和至少两个PWM信号之间的对应关系；处理器芯片用于执行：从图像传感器获取当前图像，计算当前图像的实际亮度值；通过数据表确定与第一预设亮度值(数据表中与实际亮度值对应的亮度值)对应的至少两个新的PWM信号；输出至少两个新的PWM信号至驱动模块，驱动补光灯发出补光光线。本申请实施例的摄像机采用混合补光，提升了摄像机的补光效果。

Description

摄像机
本申请要求于2019年05月08日提交中国专利局、申请号为201910380492.4、发明名称为“摄像机”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及视频监控技术领域，特别涉及一种摄像机。
背景技术
在视频监控应用中，在夜间等低照度环境中，一般都是采用补光灯对摄像机进行补光，以增强夜间画面监控效果。目前视频监控的应用场景朝着多元化、细致化的方向发展，对摄像机补光技术要求越来越高。
目前，常用的补光灯分为红外补光灯和白光补光灯两类，即采用红外补光灯或白光补光灯进行补光，使得满足夜晚低照度下的监控需求。但是上述方案中，使用红外或者白光补光，补光颜色较为单一，对于部分特殊物体的反射，画面对比度较差，不满足画面智能识别的需求；而且由于白光是人眼能够感知的可见光，因此夜间使用白光补光，隐蔽性较差，会对人眼产生干扰，对于道路监控等场景存在安全隐患。综上，当前摄像机的补光效果较差。
发明内容
本申请实施例的目的在于提供一种摄像机，以提升摄像机的补光效果。
为达到上述目的，本申请实施例公开了一种摄像机，包括：
补光灯，被配置有至少两个发光芯片，该补光灯用于发出至少两个不同波长的补光光线，其中，各个发光芯片，分别被配置与各自对应的驱动模块连接；驱动模块被配置为接收处理器芯片发送的PWM信号，从而驱动对应的发光芯片发出补光光线；
图像传感器，被配置为感知补光灯发出的补光光线，并生成图像；
存储器，被配置为存储预设的数据表，其中，数据表指示着预设亮度值和至少两个PWM信号之间的对应关系；
处理器芯片，用于执行：
从图像传感器获取一张当前图像，计算当前图像的实际亮度值；
基于实际亮度值，从数据表中确定出第一预设亮度值以及与第一预设亮度值对应的至少两个新的PWM信号；
输出至少两个新的PWM信号至驱动模块，用于驱动补光灯发出补光光线。
本申请实施例提供的摄像机包括：补光灯、至少两个驱动模块、图像传感器、存储器和处理器芯片，补光灯被配置有至少两个发光芯片，补光灯用于发出至少两个不同波长的补光光线，其中，各个所述发光芯片，分别被配置与各自对应的驱动模块连接，驱动模块被配置为接收处理器芯片发送的PWM信号，从而驱动对应的发光芯片发出补光光线；图像传感器，被配置为感知补光灯发出的补光光线，并生成图像；存储器，被配置为存储预设的数据表，数据表指示着预设亮度值和至少两个PWM信号之间的对应关系；处理器芯片，用于执行：从图像传感器获取一张当前图像，计算当前图像的实际亮度值；基于实际亮度值，从数据表中确定出第一预设亮度值以及与第一预设亮度值对应的至少两个新的PWM信号；输出至少两个新的PWM信号至驱动模块，用于驱动补光灯发出补光光线，上述方案中采用混合补光，即补光灯支持多种不同波长的补光光线，实现了根据实际环境需求采用不同波长的补光光线各自对应的PWM信号控制补光灯发光，从而提升了摄像机的补光效果。
附图说明
为了更清楚地说明本申请实施例和现有技术的技术方案，下面对实施例和现有技术中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1是本申请一实施例的摄像机的结构示意图；
图2是本申请另一实施例的摄像机的结构示意图；
图3是本申请一实施例的摄像机的补光流程示意图；
图4是本申请另一实施例的摄像机的补光流程示意图；
图5是本申请实施例的摄像机的驱动模块示意图；
图6是本申请实施例的摄像机的补光灯结构示意图；
图7是本申请实施例的摄像机的补光灯封装结构示意图；
图8是本申请实施例的摄像机的红外发光波段示意图；
图9是本申请实施例的摄像机的蓝光发光波段示意图；
图10是本申请实施例的摄像机的光敏采样电路示意图。
具体实施方式
为使本申请的目的、技术方案、及优点更加清楚明白，以下参照附图并举实施例，对本申请进一步详细说明。显然，所描述的实施例仅仅是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
首先对本申请所涉及的应用场景进行介绍：
本申请实施例提供的摄像机，应用于视频监控场景中，在夜间等低照度环境中对摄像机进行补光。
本申请实施例的摄像机，补光灯可以发出至少两种不同波长的补光光线，通过对补光灯发出的各种不同波长的补光光线的控制，即采用混合补光，实现了根据实际环境需求采用不同波长的补光光线各自对应的PWM信号控制补光灯发光，摄像机补光效果较好，从而提高摄像机的监控质量。
如图1、图2所示，本申请实施例中的摄像机包括以下模块：
1、图像传感器，是一种将光学图像转换成电子信号的设备；
2、处理器芯片：可以进行数字图像处理，编码压缩和常用的外部接口功能控制，可以为一种***级芯片(System on Chip，简称SOC)；
3、补光灯，例如为LED补光灯，可以发出至少两种不同波长的补光光线，例如为双晶元灯；
4、驱动模块：指补光灯的驱动芯片，用于控制补光灯发光，每一个补光灯的发光芯片对应一个驱动模块；从图1中可以看出一个补光灯具有多个驱动模块，分别用于控制补光灯的一种波长的补光光线的发光，每个驱动模块由一路PWM信号控制。例如一个摄像机有3个补光灯，每个补光灯可以发出两种光线，则包括三组驱动模块，每组包含两个驱动模块，每组驱动模块分别控制一个补光灯，每个驱动模块由一路PWM信号控制，驱动补光灯发出不同波 长的补光光线。其中，PWM信号用于调整驱动模块输出的电流，从而控制补光灯的亮度；
5、光敏采样模块：进行光敏信号的数字采样，获取采样信号；
6、光敏元件：一种根据光线强度变化，输出不同模拟电平的传感器。
补光灯可以发出至少两种不同波长的补光光线，例如为红蓝混合补光灯，集成红光发光芯片和蓝光发光芯片。
下面以具体的实施例对本申请的技术方案进行详细说明。下面这几个具体的实施例可以相互结合，对于相同或相似的概念或过程可能在某些实施例不再赘述。
如图1所示，摄像机包括：补光灯，被配置有至少两个发光芯片，补光灯用于发出至少两个不同波长的补光光线，其中，各个发光芯片，分别被配置与各自对应的驱动模块连接；驱动模块被配置为接收处理器芯片发送的PWM信号，从而驱动对应的发光芯片发出补光光线；
图像传感器，被配置为感知所述补光灯发出的补光光线，并生成图像；
存储器，被配置为存储预设的数据表，其中，数据表指示着预设亮度值和至少两个PWM信号之间的对应关系；
处理器芯片，用于执行：从图像传感器获取一张当前图像，计算当前图像的实际亮度值；基于实际亮度值，从数据表中确定出第一预设亮度值以及与第一预设亮度值对应的至少两个新的PWM信号；输出至少两个新的PWM信号至驱动模块，用于驱动补光灯发出补光光线。
具体的，补光灯配置有至少两个发光芯片，也就是说，补光灯内部设置有两个发光芯片，每个发光芯片可以发出不同波长的补光光线，例如为至少两种颜色的光线，如红光和蓝光，或者不同波长的红外光和蓝光等。补光灯可以是LED灯。驱动模块与发光芯片一对一连接，也就是说一个发光芯片连接至对应的一个驱动模块，驱动模块可以接收处理器芯片发送的PWM信号，并且基于PWM信号生成驱动发光芯片发出补光光线的电信号，驱动模块将生成的电信号发送至对应连接的发光芯片，驱动该发光芯片发出补光光线。
数据表指示着预设亮度值和至少两个PWM信号之间的对应关系，因此在数据表中可以直接记载预设亮度值和对应的至少两个PWM信号，也可以在数 据表中记载预设亮度值和对应的至少两个PWM信号的占空比。
处理器芯片具体可以通过数字I/O口输出至少两个新的PWM信号至驱动模块，此时PWM信号可以认为是数字信号，处理器芯片还可以通过时钟接口、模拟信号接口等输出至少两个新的PWM信号至驱动模块，此时PWM信号可以认为是高低电平的电信号、模拟信号等。
进一步的，如图2所示，摄像机还包括：依次连接的光敏采样模块和光敏元件；光敏采样模块和处理器芯片的输入接口连接；光敏采样模块，用于根据光敏元件输出的电平信号进行采样，获取采样信号；
处理器芯片还用于：根据光敏采样模块输出的采样信号，确定补光灯是否需要开启；若确定补光灯需要开启，则分别向各个发光芯片对应的驱动模块输出PWM信号。
其中，摄像机在运行过程中，首先需要确定是否开启补光灯，即需要根据外部环境的光线变化，确定是否开启补光灯，可以根据摄像机中光敏采样模块对光敏元件输出的电平信号进行采样，并输出的采样信号确定，具体可以是将光敏采样模块的采样信号的电平与预设的电平阈值进行比较，若大于预设的电平阈值，说明外部环境的光线亮度不符合要求，则确定需要开启补光灯。
在确定需要开启补光灯后，将各种不同波长的补光光线对应的PWM信号输出至对应的驱动模块，驱动模块根据PWM信号控制补光灯发光，其中，该PWM信号的占空比为预设的占空比，或前一次调整后的占空比。
图像传感器感知补光灯发出的补光光线并获取当前图像，进而通过处理器芯片确定该当前图像的实际亮度值，并根据实际亮度值，确定是否调整补光灯的补光亮度。
处理器芯片确定第一预设亮度值的方式，具体可以包括：查找数据表，在数据表中确定出第一预设亮度值，其中，第一预设亮度值与实际亮度值的偏差小于第一预设阈值。
具体的，根据实际亮度值在表1中查找该实际亮度值对应的第一预设亮度值，即在表1中查找与实际亮度值最接近的亮度值(即偏差小于第一预设阈值)，例如实际亮度值为a，与表1中的B3最接近，则确定B3为第一预设亮度值，进 而确定该第一预设亮度值对应的PWM信号的占空比，分别是红光80％，蓝光90％，将两个PWM信号分别输出至两个驱动模块，两个驱动模块控制对应的发光芯片发出不同的补光光线。
表1 数据表
Figure PCTCN2020089017-appb-000001
其中，表1中的亮度可以为光圈大小为固定值得到的数据，不同波长的补光光线的不同占空比分别对应不同的亮度值，如A1、A2等。
若不需要调整补光灯的补光亮度则结束补光控制。
进一步的，处理器芯片还被配置为：
基于当前图像对应的PWM信号，查找数据表，在数据表中确定第二预设亮度值；
在实际亮度值与第二预设亮度值的偏差大于第二预设阈值时，确定第一预设亮度值以及与第一预设亮度值对应的至少两个新的PWM信号。
在本申请实施例中，一个驱动模块连接一个发光芯片，驱动模块接收到处理器芯片发送的PWM信号后，会相应的驱动该驱动模块连接的发光芯片发出补光光线，可见，发光芯片、驱动模块、PWM信号和补光光线之间存在对应关系。并且，图像是经过对补光光线的感知生成的，因此，所生成的图像与发光芯片、驱动模块、PWM信号、补光光线之间也存在对应关系。
具体的，若当前图像的实际亮度值为a，该当前图像对应的一种补光光线的PWM信号的占空比为70％，另一种补光光线的PWM信号的占空比为80％，则根据表1中一种补光光线对应的占空比70％和另一种补光光线对应的占空比80％，确定对应的亮度值，即第二预设亮度值C4，若实际亮度值a与第二预设亮度值C4的偏差较大，大于第二预设阈值，则确定需要调整该补光灯的补光亮度，即执行确定第一预设亮度值以及与第一预设亮度值对应的至少两个新的PWM信号的步骤。
进一步的，处理器芯片还被配置为：
在当前图像的实际亮度值与第二预设亮度值的偏差小于或等于第二预设阈值时，不生成新的PWM信号。
具体的，若当前图像的实际亮度值与第二预设亮度值的偏差较小，小于或等于第二预设阈值，则不调整补光灯的补光亮度，即不会生成新的PWM信号。其中，第一预设阈值和第二预设阈值可以根据实际情况确定。
在本申请的其他实施例中，还可以根据实际亮度值，利用图像处理(Image Signal Processor，简称ISP)算法确定是否调整补光灯的补光亮度。
进一步的，处理器芯片还用于：若光敏采样模块输出的采样信号的电平小于预设的电平阈值，则控制补光灯关闭。
具体的，摄像机中光敏元件和光敏采样模块对外部光线的亮度进行实时采样，若采样信号的电平小于预设的电平阈值，说明外部环境的光线亮度符合要求，则将补光灯关闭，不进行补光。
本实施例的摄像机包括：补光灯、至少两个驱动模块、图像传感器、存储器和处理器芯片，补光灯被配置有至少两个发光芯片，补光灯用于发出至 少两个不同波长的补光光线，其中，各个所述发光芯片，分别被配置与各自对应的驱动模块连接，驱动模块被配置为接收处理器芯片发送的PWM信号，从而驱动对应的发光芯片发出补光光线；图像传感器，被配置为感知补光灯发出的补光光线，并生成图像；存储器，被配置为存储预设的数据表，数据表指示着预设亮度值和至少两个PWM信号之间的对应关系；处理器芯片，用于执行：从图像传感器获取一张当前图像，计算当前图像的实际亮度值；基于实际亮度值，从数据表中确定出第一预设亮度值以及与第一预设亮度值对应的至少两个新的PWM信号；输出至少两个新的PWM信号至驱动模块，用于驱动补光灯发出补光光线，上述方案中采用混合补光，即补光灯支持多种不同波长的补光光线，实现了根据实际环境需求采用不同波长的补光光线各自对应的PWM信号控制补光灯发光，从而提升了摄像机的补光效果，提高了摄像机的监控质量。
在上述实施例的基础上，进一步的，处理器芯片确定至少两个新的PWM信号的方式，可以包括：
基于第一预设亮度值查找数据表，确定与第一预设亮度值对应的新的第一PWM信号的占空比和新的第二PWM信号的占空比。
具体的，如表1所示，例如第一补光光线为红光，第二补光光线为蓝光，根据当前图像的实际亮度值查表，确定的第一预设亮度值为C6，第一补光光线对应的新的PWM信号的占空比为50％，第二补光光线对应的新的PWM信号的占空比为80％。
进一步的，处理器芯片执行输出所述至少两个新的PWM信号至所述驱动模块时，具体可以用于：
若第一PWM信号的占空比与第一补光光线对应的当前PWM信号的占空比不同，则向发出第一补光光线的发光芯片对应的驱动模块输出第一PWM信号；
若第二PWM信号的占空比与第二补光光线对应的当前PWM信号的占空比不同，则向发出第二补光光线的发光芯片对应的驱动模块输出第二PWM信号。
具体的，若第一补光光线对应的新的第一PWM行的占空比与当前的占空比相同，则依旧按照当前PWM信号驱动驱动模块，以控制发光芯片发光，若第一补光光线对应的新的第一PWM行的占空比与当前的占空比不同，则按照第一PWM信号驱动驱动模块，以控制发光芯片发光。对于第二补光光线实现原理类似。
例如，第一补光光线为红光，第二补光光线为蓝光，根据当前图像的实际亮度值查表，确定的第一预设亮度值为C6，第一补光光线对应的新的PWM信号的占空比为50％，第二补光光线对应的新的PWM信号的占空比为80％。当前图像的当前PWM信号的占空比分别为70％和80％，因此只需调整第二补光光线对应的PWM信号，第一补光光线依旧通过当前PWM信号驱动驱动模块，驱动模块控制对应的发光芯片发光。
例如，若实际亮度值过大，图像过爆，则根据该实际亮度值对应的第一预设亮度值，确定不同的补光光线对应的PWM信号，使得根据各种补光光线对应的PWM信号控制补光灯发出的光线进行曝光，避免图像过爆。
本实施例中，通过多种不同波长的补光光线的占空比参数控制补光灯发光，实现了根据实际环境需求采用不同光线各自对应的PWM信号控制补光灯发光，摄像机补光效果较好，从而提高摄像机的监控质量，满足智能识别的需求。
在本申请的一实施例中，如图3所示，补光控制开始，步骤301、光敏采样信号读取，即处理器芯片读取光敏采样模块输出的采样信号。步骤302、确定该采样信号是否大于阈值，若是，则执行步骤303，若否则返回执行步骤301。步骤303、根据PWM信号的占空比初始值控制补光灯发光。步骤304、补光算法判断是否需要调整补光亮度，具体过程参见前述实施例或图4所示的实施例。若是，则执行步骤305，若否则补光控制完成。步骤305、查表校验；步骤306、确定PWM占空比调整方案，例如根据表1中的对应关系，确定实际亮度值对应的各种不同波长的补光光线对应的PWM信号的占空比，作为调整后的各种不同波长的补光光线对应的PWM信号的占空比。
在本申请的另一实施例中，如图4所示，步骤101、图像传感器根据PWM信号的占空比初始值控制补光灯发出的光线进行曝光，并获取图像。步骤102、 生成初次曝光的实际亮度值，即确定图像传感器获取到的当前图像的实际亮度值。步骤103、确定获取的图像是否过爆，例如根据ISP算法确定图像是否过爆。若是，则执行步骤105、确定调整补光亮度，继续执行图3中步骤305-步骤306；若否，则执行步骤104、确定不调整补光亮度，则补光控制完成。
在上述实施例的基础上，进一步的，驱动模块，包括：
驱动芯片、第一采样电阻和电源；
其中，驱动芯片的第一端口(引脚4)连接处理器芯片的一输出端口；
驱动芯片的第二端口(引脚5)连接电源；
驱动芯片的第三端口(引脚6)分别与第一采样电阻的第一端以及补光灯连接；第一采样电阻的第二端连接电源；
驱动芯片，具体用于：
根据第一采样电阻和处理器芯片输出的一种光线对应的PWM信号，输出电流信号，电流信号用于控制补光灯的一种波长的补光光线的发射。
进一步的，驱动模块还包括：
电感、续流二极管、第一电容和第二电容；
其中，驱动芯片的第四端口(引脚1)分别连接电感的第一端和续流二极管的第一端；电感的第二端连接补光灯；续流二极管的第二端连接电源；
驱动芯片的第二端口(引脚5)还与第一电容的第一端连接，第一电容的第二端接地；
驱动芯片的第三端口(引脚6)的第一分支和第二分支分别连接第二电容的两端。
具体的，如图5所示的一驱动模块示意图，以下对驱动电路模块进行介绍：
UR2是驱动芯片，例如为LED恒流驱动芯片，通过对该LED恒流驱动芯片输入电源可以输出一个根据第一采样电阻RRn设定的电流值，这个电流输出是恒定的，驱动芯片可以根据负载的变化进行调整，以达到恒定的电流输出。
其有可以包括6个引脚，每个引脚的含义如下：
引脚1(LX)为电感引脚，接入电感LR2，进行整流输出，而DRn是续流二极管，进行电感整流负周期的能量提供。1、2端分别为阳极和阴极。
引脚2(GND)为接地脚。
引脚3(TM)为测试模式引脚，这个引脚在实际应用中可以直接接地。
引脚4(EN)为使能和调光脚，直接拉高可以使能芯片；图7中的PWMRn信号是处理器芯片输出给驱动芯片进行调光控制的。调整的电流最大值是第一采样电阻设定的最大值。例如，PWM信号占空比为20％，则驱动芯片输出的电流大小为第一采样电阻设定的最大值的20％。
引脚5(IN)为电源输入脚，可疑接入DC12V电源，第一电容CRn是电源的输入电容，进行电源滤波。
引脚6(SEN)为电流采样引脚，接入第一采样电阻RRn，通过第一采样电阻计算输出的电流值，这个电流值是硬件设定的最大输出电流值；而第二电容CR12是输出电容，进行输出驱动电流信号的滤波。
在驱动输出LEDRn+与LEDRn-中间接入补光灯(一种波长的补光光线对应的LED灯的正负极)进行驱动点亮，补光灯的亮度通过输出电流的改变而改变；而输出电流是通过处理器芯片的PWMRn信号的高电平时间变化而变化，即占空比变化而变化。
进一步的，补光灯包括至少两个LED灯，每个LED灯包括一个发光芯片，各个LED灯的两端分别与各自对应的驱动芯片的第三端口的第一分支和第二分支连接。
如图6所示，包括两个LED灯，分别发出红光和蓝光，引脚①和⑥用于散热，引脚②和③为阴极，引脚④和⑤为阳极。
进一步的，如图7所示，补光灯还包括封装结构；
至少两个LED灯设置在封装结构内；LED灯对应一个驱动模块；
封装结构包括至少两个第一接口、至少两个第二接口；
第一接口的第一端与对应的LED灯的正极连接，第二接口的第一端与对应的LED灯的负极连接；
第一接口的第二端与对应的驱动芯片的第三端口的第一分支连接；第二接口的第二端与对应的驱动芯片的第三端口的第二分支连接。
封装结构还包括至少一个第三接口，第三接口用于散热。
具体的，如图7所示，为补光灯的封装结构，图7中封装结构的宽度为5±0.05mm，补光灯的直径φ为4.4mm，图7中尺寸仅为一种示例，本申请对此并 不限定。其中，①和⑥为第三接口用于散热；④和⑤为第一接口，②和③为第二接口，或者②和③为第一接口，④和⑤为第二接口。
如图8所示，红光的中心波长为730nm，两端有效光谱带宽分别为50nm左右，如图9所示，蓝光的中心波长为460nm，两端有效光谱带宽分别为30nm左右。
进一步的，光敏采样模块，包括：
第二采样电阻和第三采样电阻；
其中，第二采样电阻的第一端分别与光敏元件的输出端和第三采样电阻的第一端连接；第二采样电阻的第二端接地；
第三采样电阻的第二端作为光敏采样模块的输出端，与处理器芯片的输入接口连接。
具体的，如图10所示，CDS1信号是光敏元件输出的信号，其电平高低是根据光敏的亮度变化而变化，第二采样电阻R132和第三采样电阻R130进行电阻采样，CDS为处理器芯片的采样输入接口，通过输入的采样信号的电平变化，判断采样信号是否达到满足条件的阈值，即满足补光灯开启或关闭的阈值，控制补光灯开启与关闭。
本申请实施例中还可以提供一种视频监控***，包括如前述任一实施例的摄像机。
本实施例的视频监控***，其实现原理和技术效果类似，此处不再赘述。
本申请实施例还提供了一种摄像机补光电路，该摄像机补光电路包括：
至少两个LED灯，至少两个LED灯中至少一个LED灯用于发射出红光，且另一个LED灯用于发射出蓝光，红外和蓝光用于给摄像机补光；
光敏传感器组件，用于生成环境光线的电平采样信号；
处理器，与光敏传感器组件电连接，用于在确定电平采样信号高于预设值时，确定开启至少两个LED灯，并响应于开启至少两个LED灯，生成至少两个PWM信号；
驱动电路，与处理器电连接，用于基于接收到的至少两个PWM信号，驱动至少两个LED灯。
可选的，光敏传感器组件包括：
光敏元件，用于感知环境光线；
光敏采样电路，与光敏元件电连接，用于对光敏元件输出的电平信号进行采样，生成电平采样信号。
可选的，光敏采样电路包括：
第二采样电阻和第三采样电阻；
第二采样电阻的第一端分别与光敏元件的输出端和第三采样电阻的第一端连接；所第二采样电阻的第二端接地；
第三采样电阻的第二端作为光敏采样电路的输出端，与处理器的输入接口连接。
可选的，驱动电路，包括：驱动芯片、第一采样电阻和电源；
驱动芯片的第一端口连接处理器的一输出端口；
驱动芯片的第二端口连接电源；
驱动芯片的第三端口分别与第一采样电阻的第一端以及任一LED灯中的发光芯片连接；第一采样电阻的第二端连接电源；
驱动芯片，用于根据第一采样电阻和处理器输出的PWM信号，输出电流信号至所连接的发光芯片，以控制所连接的发光芯片发出红光或者蓝光。
可选的，驱动电路，还包括：电感、续流二极管、第一电容和第二电容；
驱动芯片的第四端口分别连接电感的第一端和续流二极管的第一端；电感的第二端连接LED灯；续流二极管的第二端连接电源；
驱动芯片的第二端口还与第一电容的第一端连接，第一电容的第二端接地；
驱动芯片的第三端口的第一分支和第二分支分别连接第二电容的两端。
可选的，至少两个LED补光灯中每个LED灯包括一个发光芯片，各个LED灯的两端分别与各自对应的驱动芯片的第三端口的第一分支和第二分支连接。
可选的，至少两个LED灯设置在封装结构内；LED灯对应一个驱动电路；
封装结构包括至少两个第一接口、至少两个第二接口；
第一接口的第一端与对应的LED灯的正极连接，第二接口的第一端与对应的LED灯的负极连接；
第一接口的第二端与对应的驱动芯片的第三端口的第一分支连接；第二接口的第二端与对应的驱动芯片的第三端口的第二分支连接。
可选的，封装结构还包括至少一个第三接口，第三接口用于散热。
本申请实施例中，摄像机补光电路的实现原理和技术效果与上述实施例的摄像机形同或相似，此处不再赘述。
本申请实施例还提供了一种摄像机，包括：补光灯、至少两个驱动模块、图像传感器、存储器及处理器芯片；
补光灯，包括至少两个发光芯片，各个发光芯片分别与各自对应的驱动模块的输出口连接，各个发光芯片用于发出补光光线、且各个发光芯片发出的补光光线的波长不同；
驱动模块的输入口与处理器芯片的输出口连接，驱动模块用于接收处理器芯片发送的PWM信号，并基于PWM信号驱动所连接的发光芯片发出补光光线；
图像传感器，用于感知补光灯发出的补光光线，生成图像；
存储器，用于存储预设的数据表，其中，数据表指示着预设亮度值和至少两个PWM信号之间的对应关系；
图像传感器、存储器与处理器芯片的输入口连接，处理器芯片用于从图像传感器获取当前图像、从存储器获取数据表，若确定需要调整补光灯的补光亮度，则基于当前图像的实际亮度值，从数据表中对应查找到至少两个新的PWM信号，并输出至少两个新的PWM信号分别至对应的各个所述驱动模块。
是否需要调整补光灯是根据实际亮度值确定的，具体是图像传感器基于当前图像对应的各个发光芯片各自对应的PWM信号，从数据表中，查找出第二预设亮度值；若实际亮度值与第二预设亮度值的偏差大于第二预设阈值，则确定需要调整补光灯的补光亮度。
如上述，处理器芯片具有查表、判断是否需要调整补光灯的补光亮度等 功能，能够查到至少两个新的PWM信号，将查找到的新的PWM信号输出给驱动模块，驱动模块就可以基于PWM信号驱动所连接的发光芯片发出补光光线。
具体的，处理器芯片如何实现查表、判断是否需要调整补光灯的补光亮度等功能详见上述图1至图10所示实施例，这里不再赘述。
可选的，驱动模块，包括：驱动芯片、第一采样电阻和电源；
驱动芯片的第一端口连接处理器芯片的一输出端口；
驱动芯片的第二端口连接电源；
驱动芯片的第三端口分别与第一采样电阻的第一端以及补光灯中的一个发光芯片连接；第一采样电阻的第二端连接电源；
驱动芯片，用于根据第一采样电阻和处理器芯片输出的PWM信号，输出电流信号至所连接的发光芯片，以控制所连接的发光芯片发出一种波长的补光光线。
可选的，驱动模块，还包括：电感、续流二极管、第一电容和第二电容；
驱动芯片的第四端口分别连接电感的第一端和续流二极管的第一端；电感的第二端连接所述补光灯；续流二极管的第二端连接电源；
驱动芯片的第二端口还与第一电容的第一端连接，第一电容的第二端接地；
驱动芯片的第三端口的第一分支和第二分支分别连接第二电容的两端。
可选的，补光灯包括至少两个LED灯，每个LED灯包括一个发光芯片，各个LED灯的两端分别与各自对应的驱动芯片的第三端口的第一分支和第二分支连接。
可选的，补光灯还包括封装结构；
至少两个LED灯设置在封装结构内；LED灯对应一个驱动模块；
封装结构包括至少两个第一接口、至少两个第二接口；
第一接口的第一端与对应的LED灯的正极连接，第二接口的第一端与对应的LED灯的负极连接；
第一接口的第二端与对应的驱动芯片的第三端口的第一分支连接；第二接口的第二端与对应的驱动芯片的第三端口的第二分支连接。
可选的，封装结构还包括至少一个第三接口，第三接口用于散热。
可选的，摄像机还包括：依次连接的光敏采样模块和光敏元件；
光敏采样模块和处理器芯片的输入接口连接；
光敏采样模块，用于根据光敏元件输出的电平信号进行采样，获取采样信号；
处理器芯片，还用于根据光敏采样模块输出的采样信号，确定补光灯是否需要开启；若确定补光灯需要开启，则分别向各个发光芯片对应的驱动模块输出PWM信号。
可选的，光敏采样模块，包括：第二采样电阻和第三采样电阻；
第二采样电阻的第一端分别与光敏元件的输出端和第三采样电阻的第一端连接；第二采样电阻的第二端接地；
第三采样电阻的第二端作为光敏采样模块的输出端，与处理器芯片的输入接口连接。
可选的，至少两个不同波长的补光光线包括：红光和蓝光。
本申请实施例中，摄像机的实现原理和技术效果与上述图1至图10所示实施例的摄像机形同或相似，此处不再赘述。
需要说明的是，在本文中，术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含，从而使得包括一系列要素的过程、方法、物品或者设备不仅包括那些要素，而且还包括没有明确列出的其他要素，或者是还包括为这种过程、方法、物品或者设备所固有的要素。在没有更多限制的情况下，由语句“包括一个……”限定的要素，并不排除在包括所述要素的过程、方法、物品或者设备中还存在另外的相同要素。
本领域普通技术人员可以理解实现上述方法实施方式中的全部或部分步骤是可以通过程序来指令相关的硬件来完成，所述的程序可以存储于计算机可读取存储介质中，这里所称得的存储介质，如：ROM/RAM、磁碟、光盘等。
以上所述仅为本申请的较佳实施例，并非用于限定本申请的保护范围。凡在本申请的精神和原则之内所作的任何修改、等同替换、改进等，均包含在本申请的保护范围内。

Claims (32)

  1. 一种摄像机，包括：
    补光灯，被配置有至少两个发光芯片，所述补光灯用于发出至少两个不同波长的补光光线，其中，各个所述发光芯片，分别被配置与各自对应的驱动模块连接；所述驱动模块被配置为接收处理器芯片发送的PWM信号，从而驱动对应的发光芯片发出补光光线；
    图像传感器，被配置为感知所述补光灯发出的补光光线，并生成图像；
    存储器，被配置为存储预设的数据表，所述数据表指示着预设亮度值和至少两个PWM信号之间的对应关系；
    处理器芯片，用于执行：
    从所述图像传感器获取一张当前图像，计算所述当前图像的实际亮度值；
    基于所述实际亮度值，从所述数据表中确定出第一预设亮度值以及与所述第一预设亮度值对应的至少两个新的PWM信号；
    输出所述至少两个新的PWM信号至所述驱动模块，用于驱动所述补光灯发出补光光线。
  2. 根据权利要求1所述的摄像机，其中，所述至少两个新的PWM信号的确定方式，包括：
    基于所述第一预设亮度值查找所述数据表，确定与所述第一预设亮度值对应的新的第一PWM信号的占空比和新的第二PWM信号的占空比。
  3. 根据权利要求1所述的摄像机，其中，所述第一预设亮度值的确定方式，包括：：
    查找所述数据表，在所述数据表中确定出所述第一预设亮度值，其中，所述第一预设亮度值与所述实际亮度值的差值小于第一预设阈值。
  4. 根据权利要求1所述的摄像机，其中，所述处理器还被配置为：
    基于所述当前图像对应的PWM信号，查找所述数据表，在所述数据表中确定第二预设亮度值；
    在所述实际亮度值与所述第二预设亮度值的差值大于第二预设阈值时，确定所述第一预设亮度值以及与所述第一预设亮度值对应的至少两个新的PWM信号。
  5. 根据权利要求4所述的摄像机，其中，所述处理还被配置为：
    在所述实际亮度值与所述第二预设亮度值的差值小于或等于所述第二预设阈值时，不生成新的PWM信号。
  6. 根据权利要求1所述的摄像机，其中，所述驱动模块，包括：
    驱动芯片、第一采样电阻和电源；
    所述驱动芯片的第一端口连接所述处理器芯片的一输出端口；
    所述驱动芯片的第二端口连接所述电源；
    所述驱动芯片的第三端口分别与所述第一采样电阻的第一端以及所述补光灯连接；所述第一采样电阻的第二端连接所述电源；
    所述驱动芯片，具体用于：
    根据所述第一采样电阻和所述处理器芯片输出的一种光线对应的PWM信号，输出电流信号，所述电流信号用于控制所述补光灯的一种波长的补光光线的发射。
  7. 根据权利要求6所述的摄像机，其中，所述驱动模块还包括：
    电感、续流二极管、第一电容和第二电容；
    所述驱动芯片的第四端口分别连接所述电感的第一端和所述续流二极管的第一端；所述电感的第二端连接所述补光灯；所述续流二极管的第二端连接所述电源；
    所述驱动芯片的第二端口还与所述第一电容的第一端连接，所述第一电容的第二端接地；
    所述驱动芯片的第三端口的第一分支和第二分支分别连接所述第二电容的两端。
  8. 根据权利要求6所述的摄像机，其中，所述补光灯包括至少两个LED灯，每个所述LED灯包括一个发光芯片，各个所述LED灯的两端分别与各自对应的驱动芯片的第三端口的第一分支和第二分支连接。
  9. 根据权利要求8所述的摄像机，其中，所述补光灯还包括封装结构；
    所述至少两个LED灯设置在所述封装结构内；所述LED灯对应一个驱动模块；
    所述封装结构包括至少两个第一接口、至少两个第二接口；
    所述第一接口的第一端与对应的LED灯的正极连接，所述第二接口的第一端与对应的LED灯的负极连接；
    所述第一接口的第二端与对应的驱动芯片的第三端口的第一分支连接；所述第二接口的第二端与对应的驱动芯片的第三端口的第二分支连接。
  10. 根据权利要求9所述的摄像机，其中，所述封装结构还包括至少一个第三接口，所述第三接口用于散热。
  11. 根据权利要求1所述的摄像机，其中，所述摄像机还包括：
    依次连接的光敏采样模块和光敏元件；所述光敏采样模块和所述处理器芯片的输入接口连接；
    所述光敏采样模块，用于根据所述光敏元件输出的电平信号进行采样，获取采样信号；
    所述处理器芯片还用于：
    根据所述光敏采样模块输出的采样信号，确定所述补光灯是否需要开启；
    若确定所述补光灯需要开启，则分别向各个发光芯片对应的驱动模块输出PWM信号。
  12. 根据权利要求11所述的摄像机，其中，所述光敏采样模块，包括：
    第二采样电阻和第三采样电阻；
    所述第二采样电阻的第一端分别与所述光敏元件的输出端和所述第三采样电阻的第一端连接；所述第二采样电阻的第二端接地；
    所述第三采样电阻的第二端作为所述光敏采样模块的输出端，与所述处理器芯片的输入接口连接。
  13. 根据权利要求11所述的摄像机，其中，所述处理器芯片具体用于：若所述光敏采样模块输出的采样信号的电平大于预设的电平阈值，则确定所述补光灯需要开启。
  14. 根据权利要求11所述的摄像机，其中，所述处理器芯片还用于：若所述光敏采样模块输出的采样信号的电平小于预设的电平阈值，则控制所述补光灯关闭。
  15. 根据权利要求1所述的摄像机，其中，所述至少两个不同波长的补光光线包括：红光和蓝光。
  16. 一种摄像机补光电路，包括：
    至少两个LED灯，所述至少两个LED灯中至少一个LED灯用于发射出红光，且另一个LED灯用于发射出蓝光，所述红外和所述蓝光用于给所述摄像机补光；
    光敏传感器组件，用于生成环境光线的电平采样信号；
    处理器，与所述光敏传感器组件电连接，用于在确定所述电平采样信号高于预设值时，确定开启所述至少两个LED灯，并响应于开启所述至少两个LED灯，生成至少两个PWM信号；
    驱动电路，与所述处理器电连接，用于基于接收到的所述至少两个PWM信号，驱动所述至少两个LED灯。
  17. 根据权利要求16所述的摄像机补光电路，其中，所述光敏传感器组件包括：
    光敏元件，所述光敏元件用于感知环境光线；
    光敏采样电路，与所述光敏元件电连接，用于对所述光敏元件输出的电平信号进行采样，生成电平采样信号。
  18. 根据权利要求17所述的摄像机补光电路，其中，所述光敏采样电路包括：
    第二采样电阻和第三采样电阻；
    所述第二采样电阻的第一端分别与所述光敏元件的输出端和所述第三采样电阻的第一端连接；所述第二采样电阻的第二端接地；
    所述第三采样电阻的第二端作为所述光敏采样电路的输出端，与所述处理器的输入接口连接。
  19. 根据权利要求16所述的摄像机补光电路，其中，所述驱动电路，包括：驱动芯片、第一采样电阻和电源；
    所述驱动芯片的第一端口连接所述处理器的一输出端口；
    所述驱动芯片的第二端口连接所述电源；
    所述驱动芯片的第三端口分别与所述第一采样电阻的第一端以及任一所述LED灯中的发光芯片连接；所述第一采样电阻的第二端连接所述电源；
    所述驱动芯片，用于根据所述第一采样电阻和所述处理器输出的PWM信 号，输出电流信号至所连接的发光芯片，以控制所连接的发光芯片发出红光或者蓝光。
  20. 根据权利要求19所述的摄像机补光电路，其中，所述驱动电路，还包括：电感、续流二极管、第一电容和第二电容；
    所述驱动芯片的第四端口分别连接所述电感的第一端和所述续流二极管的第一端；所述电感的第二端连接所述LED灯；所述续流二极管的第二端连接所述电源；
    所述驱动芯片的第二端口还与所述第一电容的第一端连接，所述第一电容的第二端接地；
    所述驱动芯片的第三端口的第一分支和第二分支分别连接所述第二电容的两端。
  21. 根据权利要求19所述的摄像机补光电路，其中，所述至少两个LED补光灯中每个所述LED灯包括一个发光芯片，各个所述LED灯的两端分别与各自对应的驱动芯片的第三端口的第一分支和第二分支连接。
  22. 根据权利要求21所述的摄像机补光电路，其中，所述至少两个LED灯设置在封装结构内；所述LED灯对应一个驱动电路；
    所述封装结构包括至少两个第一接口、至少两个第二接口；
    所述第一接口的第一端与对应的LED灯的正极连接，所述第二接口的第一端与对应的LED灯的负极连接；
    所述第一接口的第二端与对应的驱动芯片的第三端口的第一分支连接；所述第二接口的第二端与对应的驱动芯片的第三端口的第二分支连接。
  23. 根据权利要求22所述的摄像机补光电路，其中，所述封装结构还包括至少一个第三接口，所述第三接口用于散热。
  24. 一种摄像机，其特征在于，包括：补光灯、至少两个驱动模块、图像传感器、存储器及处理器芯片；
    所述补光灯，包括至少两个发光芯片，各个所述发光芯片分别与各自对应的驱动模块的输出口连接，各个所述发光芯片用于发出补光光线、且各个所述发光芯片发出的补光光线的波长不同；
    所述驱动模块的输入口与所述处理器芯片的输出口连接，所述驱动模块 用于接收所述处理器芯片发送的PWM信号，并基于所述PWM信号驱动所连接的发光芯片发出补光光线；
    所述图像传感器，用于感知所述补光灯发出的补光光线，生成图像；
    所述存储器，用于存储预设的数据表，所述数据表指示着预设亮度值和至少两个PWM信号之间的对应关系；
    所述图像传感器、所述存储器与所述处理器芯片的输入口连接，所述处理器芯片用于从所述图像传感器获取当前图像、从所述存储器获取所述数据表，若确定需要调整所述补光灯的补光亮度，则基于所述当前图像的实际亮度值，从所述数据表中对应查找到至少两个新的PWM信号，并输出所述至少两个新的PWM信号分别至对应的各个所述驱动模块。
  25. 根据权利要求24所述的摄像机，其特征在于，所述驱动模块，包括：驱动芯片、第一采样电阻和电源；
    所述驱动芯片的第一端口连接所述处理器芯片的一输出端口；
    所述驱动芯片的第二端口连接所述电源；
    所述驱动芯片的第三端口分别与所述第一采样电阻的第一端以及所述补光灯中的一个发光芯片连接；所述第一采样电阻的第二端连接所述电源；
    所述驱动芯片，用于根据所述第一采样电阻和所述处理器芯片输出的PWM信号，输出电流信号至所连接的发光芯片，以控制所连接的发光芯片发出一种波长的补光光线。
  26. 根据权利要求25所述的摄像机，其特征在于，所述驱动模块，还包括：电感、续流二极管、第一电容和第二电容；
    所述驱动芯片的第四端口分别连接所述电感的第一端和所述续流二极管的第一端；所述电感的第二端连接所述补光灯；所述续流二极管的第二端连接所述电源；
    所述驱动芯片的第二端口还与所述第一电容的第一端连接，所述第一电容的第二端接地；
    所述驱动芯片的第三端口的第一分支和第二分支分别连接所述第二电容的两端。
  27. 根据权利要求25所述的摄像机，其特征在于，所述补光灯包括至少 两个LED灯，每个所述LED灯包括一个发光芯片，各个所述LED灯的两端分别与各自对应的驱动芯片的第三端口的第一分支和第二分支连接。
  28. 根据权利要求27所述的摄像机，其特征在于，所述补光灯还包括封装结构；
    所述至少两个LED灯设置在所述封装结构内；所述LED灯对应一个驱动模块；
    所述封装结构包括至少两个第一接口、至少两个第二接口；
    所述第一接口的第一端与对应的LED灯的正极连接，所述第二接口的第一端与对应的LED灯的负极连接；
    所述第一接口的第二端与对应的驱动芯片的第三端口的第一分支连接；所述第二接口的第二端与对应的驱动芯片的第三端口的第二分支连接。
  29. 根据权利要求28所述的摄像机，其特征在于，所述封装结构还包括至少一个第三接口，所述第三接口用于散热。
  30. 根据权利要求24所述的摄像机，其特征在于，还包括：依次连接的光敏采样模块和光敏元件；
    所述光敏采样模块和所述处理器芯片的输入接口连接；
    所述光敏采样模块，用于根据所述光敏元件输出的电平信号进行采样，获取采样信号；
    所述处理器芯片，还用于根据所述光敏采样模块输出的采样信号，确定所述补光灯是否需要开启；若确定所述补光灯需要开启，则分别向各个发光芯片对应的驱动模块输出PWM信号。
  31. 根据权利要求30所述的摄像机，其特征在于，所述光敏采样模块，包括：第二采样电阻和第三采样电阻；
    所述第二采样电阻的第一端分别与所述光敏元件的输出端和所述第三采样电阻的第一端连接；所述第二采样电阻的第二端接地；
    所述第三采样电阻的第二端作为所述光敏采样模块的输出端，与所述处理器芯片的输入接口连接。
  32. 根据权利要求24所述的摄像机，其特征在于，所述至少两个不同波长的补光光线包括：红光和蓝光。
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