Light source control circuit and light source control system

Abstract

The embodiment of the utility model provides a light source control circuit and a light source control system, and belongs to the technical field of semiconductors. The light source control circuit is electrically connected with a plurality of target light sources, the light source control circuit is in communication connection with the upper computer, and the light source control circuit comprises a control module and a plurality of feedback loop modules; the control module is electrically connected with each feedback loop module, and each feedback loop module is electrically connected with each target light source; the control module is used for receiving a light source adjusting instruction sent by the upper computer, analyzing the light source adjusting instruction to obtain a digital light source control signal, and setting an analog light source control signal according to the digital light source control signal; the feedback loop module is used for receiving and responding to the analog light source control signal and adjusting the brightness of the target light source; wherein the feedback loop module is used for segmenting an analog light source control signal and a digital light source control signal. According to the embodiment of the invention, the illumination states of the plurality of light sources can be flexibly adjusted.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of semiconductor, and particularly relates to a light source control circuit and a light source control system. BACKGROUND

[0002] In the production and manufacturing process of semiconductors, the wafer grain information (such as the position and direction of the grain) often needs to be accurately identified, so as to subsequently perform a test operation on the wafer. The light source controller can be used to adjust the lighting state of the light source, and the camera can be used to take a picture of the wafer to obtain an image with the grain information. However, in the current wafer photographing process, the camera and the light source controller are difficult to work well in cooperation, which affects the quality of the image. For example, in the scene with multiple light sources, the adjustment process of the light source is relatively complex, and there is signal interference. The current light source controller is difficult to control multiple light sources to perform lighting synchronously, and the flexibility is poor.

[0003] Therefore, how to flexibly adjust the lighting state of multiple light sources has become a technical problem to be solved. CONTENT OF THE UTILITY MODEL

[0004] The main purpose of the embodiment of the present application is to provide a light source control circuit and a light source control system which can flexibly adjust the lighting state of multiple light sources.

[0005] To achieve the above-mentioned purpose, the first aspect of the embodiment of the present application provides a light source control circuit, which is electrically connected with multiple target light sources, and is in communication connection with an upper computer. The light source control circuit comprises a control module and multiple feedback loop modules.

[0006] The control module is electrically connected with each feedback loop module, and each feedback loop module is electrically connected with each target light source.

[0007] The control module is used to receive a light source adjustment instruction sent by the upper computer, analyze the light source adjustment instruction to obtain a digital light source control signal, and set an analog light source control signal according to the digital light source control signal. The feedback loop module is used to receive and respond to the analog light source control signal to adjust the brightness of the target light source. The feedback loop module is used to divide the analog light source control signal and the digital light source control signal.

[0008] In some embodiments, the feedback loop module comprises a light source equivalent unit, a voltage acquisition unit and a voltage adjustment unit.

[0009] The light source equivalent unit is electrically connected to the target light source, the voltage acquisition unit is electrically connected to the light source equivalent unit, and the voltage adjustment unit is electrically connected to the voltage acquisition unit and the control module; wherein the voltage change of the light source equivalent unit is synchronous with the voltage change of the target light source.

[0010] The voltage acquisition unit is configured to acquire a current voltage of the light source equivalent unit; and the voltage adjustment unit is configured to adjust the voltage of the light source equivalent unit according to the current voltage and the analog light source control signal, so as to adjust the brightness of the target light source.

[0011] In some embodiments, the light source control circuit further comprises a switch driving module.

[0012] The switch driving module is electrically connected to the control module and the voltage adjustment unit.

[0013] The control module is further configured to send a switch control signal; and the switch driving module is configured to control the signal processing state of the voltage adjustment unit in response to the switch control signal, so as to control the response time of the voltage adjustment unit to the analog light source control signal.

[0014] In some embodiments, the voltage acquisition unit comprises a first operational amplifier and a second operational amplifier; and the voltage adjustment unit comprises a third operational amplifier.

[0015] The inverting input end of the second operational amplifier is electrically connected to the target light source, the output end of the second operational amplifier is electrically connected to the non-inverting input end of the second operational amplifier and the inverting input end of the first operational amplifier, the non-inverting input end of the first operational amplifier is electrically connected to the control module, the output end of the operational amplifier is electrically connected to the non-inverting input end of the third operational amplifier, the inverting input end of the third operational amplifier is electrically connected to the output end of the third operational amplifier, and the output end of the third operational amplifier is electrically connected to the target light source.

[0016] In some embodiments, the light source control circuit further comprises a voltage limiting unit.

[0017] The voltage limiting unit is electrically connected to the voltage acquisition unit; and the voltage limiting unit is configured to limit the voltage of the voltage acquisition unit.

[0018] In some embodiments, the voltage limiting unit comprises a first diode and a second diode.

[0019] The input end of the first diode and the output end of the second diode are electrically connected to the voltage acquisition unit, the output end of the first diode is grounded, and the input end of the second diode is grounded.

[0020] In some embodiments, the light source control circuit further comprises: a filter voltage stabilization unit;

[0021] The filter voltage stabilization unit is electrically connected with the voltage acquisition unit and the voltage regulation unit, and is configured to filter signals of the voltage acquisition unit and the voltage regulation unit.

[0022] In some embodiments, the filter voltage stabilization unit comprises: a first capacitor, a second capacitor and a polarity capacitor.

[0023] One end of the first capacitor is electrically connected with the non-inverting input terminal of the first operational amplifier, and the other end of the first capacitor is electrically connected with the output terminal of the first operational amplifier; one end of the second capacitor is electrically connected with the inverting input terminal of the third operational amplifier, and the other end of the second capacitor is electrically connected with the non-inverting input terminal of the third operational amplifier; the positive electrode of the polarity capacitor is electrically connected with the power supply terminal of the third operational amplifier, and the negative electrode of the polarity capacitor is grounded.

[0024] In some embodiments, the control module comprises: a serial communication chip, a single-chip microcomputer and a digital-to-analog conversion chip.

[0025] The serial communication chip is electrically connected with the single-chip microcomputer, the single-chip microcomputer is electrically connected with the digital-to-analog conversion chip, and the digital-to-analog conversion chip is electrically connected with the feedback loop module; the serial communication chip is in communication connection with the upper computer.

[0026] The serial communication chip is configured to receive a light source regulation instruction sent by the upper computer, and send the light source regulation instruction to the single-chip microcomputer through a serial communication mode; the single-chip microcomputer is configured to analyze the light source regulation instruction to obtain a digital light source control signal; and the digital-to-analog conversion chip is configured to perform digital-to-analog conversion on the digital light source control signal to obtain the analog light source control signal.

[0027] To achieve the above object, a second aspect of the embodiment of the present application provides a light source control system, comprising: a light source controller, a target light source, a camera device and an upper computer; the light source controller has the light source control circuit of the first aspect described above;

[0028] The upper computer is in communication connection with the light source controller and the camera device, and the light source controller is electrically connected with the target light source.

[0029] The upper computer is configured to send a light source trigger signal and a camera trigger signal; the light source control circuit is configured to control the target light source to perform a light-emitting action in a target time period in response to the light source trigger signal; and the camera device is configured to perform a photographing action in the target time period in response to the camera trigger signal.

[0030] The light source control circuit and the light source control system provided by the application receive the light source adjustment instruction sent by the host computer through the control module of the light source control circuit, then analyze the light source adjustment instruction to obtain a digital light source control signal, and set an analog light source control signal according to the digital light source control signal. Through the feedback loop module of the light source control circuit, the analog light source control signal is received and responded to, and the brightness of the target light source is adjusted. The analog light source control signal and the digital light source control signal can be segmented, so as to avoid the interference between the digital light source control signal and the analog light source control signal, and the lighting state of multiple light sources can be flexibly adjusted. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 is a module block diagram of the light source control circuit provided by an embodiment of the application;

[0032] Figure 2 is a module block diagram of the light source control circuit provided by another embodiment of the application;

[0033] Figure 3 is a module block diagram of the light source control circuit provided by another embodiment of the application;

[0034] Figure 4 is a circuit principle diagram of the light source control circuit provided by an embodiment of the application;

[0035] Figure 5 is a module block diagram of the light source control system provided by an embodiment of the application.

[0036] Significant: 100, target light source; 200, host computer; 300, control module; 400, feedback loop module; 500, switch driving module; 600, light source controller; 700, camera device; 410, light source equivalent unit; 420, voltage acquisition unit; 430, voltage adjustment unit. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical scheme and advantages of the application more clear, the application is further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the application, and are not used to limit the application.

[0038] It should be noted that although the functional modules are divided in the device schematic diagram, and the logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in a manner different from the module division in the device or the order in the flowchart. The terms "first", "second", etc. in the specification, claims and the above drawings are used to distinguish similar objects, and do not necessarily describe a specific order or sequence.

[0039] Unless otherwise defined, 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 application belongs. The terminology used herein is for the purpose of describing embodiments of this application only and is not intended to be limiting of this application.

[0040] The light source control circuit and the light source control system provided by the embodiments of the present application are specifically described through the following embodiments. First, the light source control circuit in the embodiments of the present application is described.

[0041] In some embodiments, the host computer can be a smartphone, a tablet computer, a notebook computer, a desktop computer, etc. The host computer can also be a standalone physical server or a distributed system, and can also be configured to provide cloud services, cloud databases, cloud computing, cloud functions, cloud storage, network services, cloud communication, middleware services, domain name services, security services, CDNs, and basic cloud computing services such as big data and artificial intelligence platforms, but is not limited to the above types.

[0042] The present application can be used in many general or special computer system environments or configurations. For example: personal computers, server computers, handheld devices or portable devices, tablet devices, multi-processor systems, microprocessor-based systems, set-top boxes, programmable consumer electronics, network PCs, minicomputers, mainframe computers, distributed computing environments including any of the above systems or devices, etc. The present application can be described in the general context of computer-executable instructions executed by a computer, such as program modules. Generally, program modules include routines, programs, objects, components, data structures, etc. that perform specific tasks or implement specific abstract data types. The present application can also be practiced in a distributed computing environment in which tasks are performed by remote processing devices connected by a communication network. In a distributed computing environment, program modules can be located in local and remote computer storage media, including storage devices.

[0043] Figure 1 is an optional module block diagram of the light source control circuit provided by the embodiments of the present application. The light source control circuit is electrically connected to a plurality of target light sources 100. The light source control circuit is in communication connection with a host computer 200. The light source control circuit includes a control module 300 and a plurality of feedback loop modules 400.

[0044] The control module 300 is electrically connected to each feedback loop module 400. Each feedback loop module 400 is electrically connected to each target light source 100.

[0045] The control module 300 is used to receive the light source adjustment instruction sent by the host computer 200, parse the light source adjustment instruction to obtain a digital light source control signal, and set the analog light source control signal according to the digital light source control signal; the feedback loop module 400 is used to receive and respond to the analog light source control signal to adjust the brightness of the target light source 100; wherein, the feedback loop module 400 is used to separate the analog light source control signal and the digital light source control signal.

[0046] The beneficial effects of the embodiments of the present application include, but are not limited to, receiving a light source adjustment instruction sent by the host computer 200 through the control module 300 of the light source control circuit, parsing the light source adjustment instruction to obtain a digital light source control signal, and setting an analog light source control signal based on the digital light source control signal. The feedback loop module 400 of the light source control circuit receives and responds to the analog light source control signal to adjust the brightness of the target light source 100, and can separate the analog light source control signal and the digital light source control signal, thereby avoiding interference between the digital light source control signal and the analog light source control signal, and can flexibly adjust the lighting status of multiple light sources.

[0047] Specifically, the communication between the host computer 200 and the light source control circuit can adopt a serial communication protocol (such as the Modbus protocol) to improve the reliability of communication. Checksums, retransmission mechanisms, error detection and correction measures can also be used to improve the reliability of communication between the host computer 200 and the light source control circuit.

[0048] In some embodiments, the light source control circuit includes multiple feedback loop modules 400. For example, Figure 1 As shown, the light source control circuit includes two feedback loop modules 400, and each feedback loop module 400 is electrically connected to a target light source 100. It should be noted that as the complexity of equipment increases, multiple light sources often need to be integrated into one device, so it is often necessary to adopt a light source control circuit to control multiple target light sources 100. In the case where a light source control circuit is electrically connected to multiple light sources, coupling interference is likely to occur between the digital signal and the analog signal in the light source control circuit, resulting in a decrease in signal quality. The embodiment of the present application is aimed at the application scenario of multiple light sources. Through the control module 300, the analog light source control signal can be set according to the digital light source control signal, thereby realizing the segmentation of the analog light source control signal and the digital light source control signal, avoiding signal interference, and thereby improving the reliability of the light source control circuit.

[0049] It should be noted that the target light source 100 may be a DC light source, so as to ensure the stability of illumination and avoid flickering of the target light source 100 .

[0050] In some embodiments, the feedback loop module 400 can adopt a continuous reading strategy, specifically including: in the case that the feedback loop module 400 continuously reads a predetermined number (such as 8 times) of high-level signals, the analog light source control signal is determined as a valid high-level signal. Similarly, in the case that the feedback loop module 400 continuously reads 8 times of high-level signals of the analog light source control signal, the analog light source control signal is determined as a valid low-level signal. The embodiment of the present application can effectively improve the stability of the signal, thereby reducing the mis-triggering and flickering phenomenon, and improving the reliability of the light source control circuit.

[0051] Please refer to Figure 2 In some embodiments, the feedback loop module 400 includes: a light source equivalent unit 410, a voltage acquisition unit 420, and a voltage adjustment unit 430.

[0052] The light source equivalent unit 410 is electrically connected to the target light source 100, the voltage acquisition unit 420 is electrically connected to the light source equivalent unit 410, and the voltage adjustment unit 430 is electrically connected to the voltage acquisition unit 420 and the control module 300; wherein the voltage change of the light source equivalent unit 410 is synchronized with the voltage change of the target light source 100.

[0053] The voltage acquisition unit 420 is configured to acquire the current voltage of the light source equivalent unit 410; and the voltage adjustment unit 430 is configured to adjust the voltage of the light source equivalent unit 410 according to the current voltage and the analog light source control signal, so as to adjust the brightness of the target light source 100.

[0054] The embodiment has the advantages that the voltage acquisition unit 420 acquires the current voltage of the light source equivalent unit 410 which changes synchronously with the voltage of the target light source 100, and the voltage adjustment unit 430 can adjust the voltage of the light source equivalent unit 410 according to the current voltage and the analog light source control signal, thereby realizing the brightness adjustment of the target light source 100.

[0055] Please refer to Figure 3 In some embodiments, the light source control circuit further includes: a switch driving module 500.

[0056] The switch driving module 500 is electrically connected to the control module 300 and the voltage adjustment unit 430.

[0057] The control module 300 is further configured to send a switch control signal; and the switch driving module 500 is configured to control the signal processing state of the voltage adjustment unit 430 in response to the switch control signal, so as to control the response time of the voltage adjustment unit 430 to the analog light source control signal.

[0058] The embodiment has the advantages that the switch driving module 500 controls the signal processing state of the voltage adjusting unit 430 in response to the switch control signal sent by the control module 300, thereby controlling the response time of the voltage adjusting unit 430 to the analog light source control signal, and further significantly shortening the response time of the target light source 100 to the light source adjusting signal.

[0059] It should be noted that, due to the long feedback loop module 400, the transmission time of the signal in the feedback loop module 400 is long, and the target light source 100 responds slowly to the signal. Therefore, the embodiment of the present application shortens the response time of the target light source 100 to the light source adjusting signal through the switch driving module 500, and can quickly switch the target light source 100, thereby accurately controlling the cooperative work of the target light source 100 and the camera.

[0060] Specifically, the switch driving module 500 can include a MOS tube, and the signal processing state of the voltage adjusting unit 430 is controlled by turning on or turning off the MOS tube. It should be noted that the voltage adjusting unit 430 can include an operational amplifier, and the signal processing state of the voltage adjusting unit 430 can be the level state of the pin of the operational amplifier in the voltage adjusting unit 430.

[0061] Please refer to Figure 4 In some embodiments, the voltage collecting unit 420 includes a first operational amplifier U1 and a second operational amplifier U2; the voltage adjusting unit 430 includes a third operational amplifier U3;

[0062] The inverting input end of the second operational amplifier U2 is electrically connected to the target light source 100, the output end of the second operational amplifier U2 is electrically connected to the non-inverting input end of the second operational amplifier U2 and the inverting input end of the first operational amplifier U1, the non-inverting input end of the first operational amplifier U1 is electrically connected to the control module 300, the output end of the operational amplifier is electrically connected to the non-inverting input end of the third operational amplifier U3, the inverting input end of the third operational amplifier U3 is electrically connected to the output end of the third operational amplifier U3, and the output end of the third operational amplifier U3 is electrically connected to the target light source 100.

[0063] The embodiment has the advantages that the voltage collecting unit 420 collects the current voltage of the light source equivalent unit 410 and the target light source 100 which changes synchronously, and the voltage adjusting unit 430 can adjust the voltage of the light source equivalent unit 410 according to the current voltage and the analog light source control signal, thereby realizing the brightness adjustment of the target light source 100.

[0064] It should be noted that, in Figure 4 P1 represents a first interface P1, and the first interface P1 is electrically connected to the control module 300. P2 represents a second interface P2, and the second interface P2 is electrically connected to the target light source 100.

[0065] Specifically, the input end of the first diode and the output end of the second diode are electrically connected to the non-inverting input end of the second operational amplifier U2.

[0066] In some embodiments, the light source control circuit further comprises: a voltage limiting unit;

[0067] The voltage limiting unit is electrically connected to the voltage collecting unit 420, and is configured to limit the voltage of the voltage collecting unit 420.

[0068] The embodiment has the advantage that the voltage of the voltage collecting unit 420 is limited by the voltage limiting unit, thereby preventing excessively high voltage from damaging the operational amplifier in the voltage collecting unit 420, and improving the stability of the light source control circuit.

[0069] Referring to Figure 4 In some embodiments, the voltage limiting unit comprises: a first diode D1 and a second diode D2.

[0070] The input end of the first diode D1 and the output end of the second diode D2 are electrically connected to the voltage collecting unit 420, the output end of the first diode D1 is grounded, and the input end of the second diode D2 is grounded.

[0071] The embodiment has the advantage that the voltage limiting unit is composed of the first diode D1 and the second diode D2, thereby limiting the voltage of the voltage collecting unit 420 and improving the stability of the light source control circuit.

[0072] In some embodiments, the light source control circuit further comprises: a filter and voltage stabilizing unit.

[0073] The filter and voltage stabilizing unit is electrically connected to the voltage collecting unit 420 and the voltage adjusting unit 430, and is configured to filter the signals of the voltage collecting unit 420 and the voltage adjusting unit 430.

[0074] The embodiment has the advantage that the filter and voltage stabilizing unit filters the signals of the voltage collecting unit 420 and the voltage adjusting unit 430, thereby filtering out noise in the signals, ensuring the clarity and accuracy of the signals, reducing erroneous operations caused by noise, and improving the reliability and stability of the light source control circuit.

[0075] Referring to Figure 4 In some embodiments, the filter and voltage stabilizing unit comprises: a first capacitor C1, a second capacitor C2, and a polarity capacitor CE1.

[0076] One end of the first capacitor C1 is electrically connected to the non-inverting input terminal of the first operational amplifier U1, and the other end of the first capacitor C1 is electrically connected to the output terminal of the first operational amplifier U1; one end of the second capacitor C2 is electrically connected to the inverting input terminal of the third operational amplifier U3, and the other end of the second capacitor C2 is electrically connected to the non-inverting input terminal of the third operational amplifier U3; the positive electrode of the polarity capacitor CE1 is electrically connected to the power supply terminal of the third operational amplifier U3, and the negative electrode of the polarity capacitor CE1 is grounded.

[0077] Please refer to Figure 2 and Figure 4 In some embodiments, the light source equivalent unit 410 includes a ninth resistor R9. It should be noted that adjusting the voltage of the ninth resistor R9 is equivalent to adjusting the voltage of the target light source 100. Specifically, according to Kirchhoff's current law, the current flowing through the ninth resistor R9 is equal to the current flowing through the target light source 100. According to Ohm's law and Kirchhoff's current law, by controlling the voltage across the ninth resistor R9, the current flowing through the target light source 100 can be accurately controlled. Therefore, the voltage adjustment of the target light source 100 can be realized by adjusting the voltage across the ninth resistor R9.

[0078] The filter voltage stabilizing unit further includes a second resistor R2, a fourth resistor R4, a fifth resistor R5, and a seventh resistor R7. The voltage collecting unit 420 further includes a sixth resistor R6, an eighth resistor R8, a tenth resistor R10, and an eleventh resistor R11. The voltage adjusting unit 430 further includes a first resistor R1 and a third resistor R3.

[0079] As shown in Figure 4 , the first resistor R1 is electrically connected to the third resistor R3, and the second resistor R2 is electrically connected to the fourth resistor R4; one end of the fifth resistor R5 is electrically connected to the output terminal of the first operational amplifier U1, and the other end of the fifth resistor R5 is electrically connected to the non-inverting input terminal of the third operational amplifier U3; the seventh resistor R7 is electrically connected to the ninth resistor R9; the eighth resistor R8 is electrically connected to the eleventh resistor R11, the eleventh resistor R11 is electrically connected to the tenth resistor R10, and the tenth resistor R10 is electrically connected to the sixth resistor R6.

[0080] Specifically, in some embodiments, the eighth resistor R8 has a value of 1kΩ (kilo-ohm), the ninth resistor R9 has a value of 0.5Ω, the tenth resistor R10 has a value of 22kΩ, and the eleventh resistor R11 has a value of 2kΩ.

[0081] In some embodiments, the control module 300 includes a serial communication chip, a single-chip microcomputer, and a digital-to-analog conversion chip.

[0082] The serial communication chip is electrically connected to the single-chip microcomputer, the single-chip microcomputer is electrically connected to the digital-to-analog conversion chip, and the digital-to-analog conversion chip is electrically connected to the feedback loop module 400; the serial communication chip is in communication connection with the upper computer 200.

[0083] The serial communication chip is configured to receive the light source adjustment instruction sent by the host computer 200 and send the light source adjustment instruction to the single-chip microcomputer through serial communication.

[0084] Specifically, the single-chip microcomputer has a main frequency of 8 MHz (mega-hertz), so that the response speed of the target light source 100 reaches 0.1 ms (millisecond), meeting the requirements of high response speed and anti-flicker. The digital-to-analog conversion chip can be a DAC (Digital-to-Analog Converter, abbreviated as DAC). The digital-to-analog conversion chip communicates with the single-chip microcomputer through an SPI (Serial Peripheral Interface) bus.

[0085] In some embodiments, the light source control circuit further comprises a latch module. The control module 300 is electrically connected to at least two latch modules, and each latch module is electrically connected to the feedback loop module 400.

[0086] The latch module is configured to store the light source control signal. The control module 300 is further configured to send an enable signal to each latch module according to a preset target time, so that the latch module sends the light source control signal to the feedback loop module 400 at the target time.

[0087] The advantage of this embodiment is that the light source control signal is stored in the latch module, and in response to the enable signal of the control module 300, the light source control signal is sent to the feedback loop module 400 at the target time, thereby realizing the light illumination control of different target light sources 100.

[0088] Specifically, the latch module can be an 8-bit latch, such as a 74HC573D latch.

[0089] In some embodiments, the light source control circuit further comprises a voltage stabilizing power supply module. The voltage stabilizing power supply module is electrically connected to the digital-to-analog conversion chip. The voltage stabilizing power supply module is configured to supply power to the digital-to-analog conversion chip based on a preset reference voltage.

[0090] The advantage of this embodiment is that the voltage stabilizing power supply module supplies power to the digital-to-analog conversion chip, thereby providing stable voltage, ensuring the stability and reliability of the light source control circuit.

[0091] Specifically, the voltage stabilizing power supply module can be a linear voltage stabilizer, such as an SGM4029-2.5 linear voltage stabilizer. The output voltage of the voltage stabilizing power supply module can be 2.5 V.

[0092] Please refer to Figure 5The embodiment of the present application also provides a light source control system, which comprises a light source controller 600, a target light source 100, a camera 700 and a host computer 200; the light source controller 600 has the light source control circuit described above;

[0093] The host computer 200 is in communication connection with the light source controller 600 and the camera 700, and the light source controller 600 is electrically connected with the target light source 100.

[0094] The host computer 200 is configured to send a light source trigger signal and a camera trigger signal; the light source control circuit is configured to control the target light source 100 to perform a light emitting action in a target time period in response to the light source trigger signal; and the camera 700 is configured to perform a photographing action in the target time period in response to the camera trigger signal.

[0095] It should be noted that the camera 700 can be a camera. The synchronous operation of the camera and the target light source 100 is crucial for obtaining a clear and consistent image. Synchronization means that the target light source 100 emits light exactly at the time (such as the target time period) when the camera takes a picture. In the target time period, the camera performs a photographing action, and exposure is performed, so the target time period includes the exposure time of the camera. The exposure time of the camera can be adjusted according to the light source brightness and the motion state of the photographed object, and the target time period is adjusted accordingly. For example, in the case that the brightness of the target light source 100 is high, a shorter exposure time can be used; in the case that the photographed object moves quickly, a shorter exposure time can be used to avoid blurring.

[0096] It should be noted that the brightness of the target light source 100 has a significant impact on the image quality. If the brightness of the target light source 100 is too low, it is difficult to obtain a clear image; if the brightness of the target light source 100 is too high, overexposure may occur, which also affects the quality of the image.

[0097] It should be noted that in order to ensure image uniformity, uniform illumination needs to be provided. For this purpose, the light source control system of some embodiments can further comprise a light diffusion module. The light diffusion module is implemented by using.

[0098] Specifically, the light diffusion module can be a diffusion plate, a light shield or the like.

[0099] The specific implementation of the light source control system is basically the same as that of the above-described specific embodiment of the light source control circuit, and will not be described here again.

[0100] The embodiments described in the embodiments of the present application are for more clearly illustrating the technical solutions of the embodiments of the present application, and do not constitute a limitation on the technical solutions provided by the embodiments of the present application. Those skilled in the art can know that, with the evolution of technology and the appearance of new application scenarios, the technical solutions provided by the embodiments of the present application are also applicable to similar technical problems.

[0101] Those skilled in the art can understand that the technical solutions shown in the figures do not constitute a limitation to the embodiments of the present application, and can include more or fewer steps than the figures, or combine certain steps, or different steps.

[0102] The apparatus embodiments described above are merely illustrative, and units described as separate components can or can not be physically separate, i.e., can be located in one place, or can be distributed to multiple network units. Part or all of the modules can be selected according to actual needs to achieve the purpose of the embodiments.

[0103] Those skilled in the art can understand that the functional modules / units in the above disclosed system and device can be implemented as software, firmware, hardware and their appropriate combinations.

[0104] The terms "first", "second", "third", "fourth" and the like (if any) in the description of the present application and the above-described drawings are used to distinguish similar objects, and do not necessarily have to describe a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a system, product or device including a series of units does not necessarily have to be limited to those clearly listed, but can include other units not clearly listed or inherent to these products or devices.

[0105] It should be understood that in the present application, "at least one" means one or more, and "multiple" means two or more. "And / or" is used to describe the association between the associated objects, which means that there can be three relationships, for example, "A and / or B" can represent three cases: only A exists, only B exists, and A and B exist at the same time, where A and B can be singular or plural. The character " / " generally represents an "or" relationship between the associated objects. "At least one of the following" or similar expressions means any combination of these items, including single or multiple combinations of any combination. For example, at least one of a, b or c can represent: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, and c can be single or multiple.

[0106] In several embodiments provided in the present application, it should be understood that the disclosed apparatus can be implemented in other manners. For example, the division of the apparatus embodiments described above is merely a logical division, and there can be another division manner in actual implementation. For example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. The coupling or direct coupling or communication connection between the shown or discussed units can be indirect coupling or communication connection through some interfaces, devices or units, and can be electrical, mechanical or other forms.

[0107] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, i.e., they can be located in one place or distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the embodiment.

[0108] In addition, the functional units in each embodiment of the present application can be integrated in one processing unit, or each unit can be physically present separately, or two or more units can be integrated in one unit. The integrated unit can be realized in the form of hardware or in the form of a software functional unit.

[0109] If the integrated unit is realized in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer readable storage medium. Based on this understanding, the technical solutions of the present application essentially or the part that contributes to the prior art or the whole or part of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium, and includes a plurality of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods of the embodiments of the present application. The aforementioned storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and various program storage media.

[0110] The preferred embodiments of the embodiments of the present application are described above with reference to the accompanying drawings, but this does not limit the scope of the rights of the embodiments of the present application. Any modifications, equivalent replacements and improvements made by those skilled in the art without departing from the scope and essence of the embodiments of the present application shall be within the scope of the rights of the embodiments of the present application.

Claims

1. A light source control circuit, characterized in that: The light source control circuit is electrically connected to a plurality of target light sources, and is communicatively connected to a host computer. The light source control circuit includes: a control module and a plurality of feedback loop modules; The control module is electrically connected to each of the feedback loop modules, and each of the feedback loop modules is electrically connected to each of the target light sources; The control module is used to receive the light source adjustment instruction sent by the host computer, parse the light source adjustment instruction to obtain a digital light source control signal, and set the analog light source control signal according to the digital light source control signal; the feedback loop module is used to receive and respond to the analog light source control signal to adjust the brightness of the target light source; wherein, the feedback loop module is used to separate the analog light source control signal and the digital light source control signal.

2. The light source control circuit according to claim 1, wherein: The feedback loop module includes: a light source equivalent unit, a voltage acquisition unit and a voltage regulation unit; The light source equivalent unit is electrically connected to the target light source, the voltage acquisition unit is electrically connected to the light source equivalent unit, and the voltage adjustment unit is electrically connected to the voltage acquisition unit and the control module; wherein the voltage change of the light source equivalent unit is synchronized with the voltage change of the target light source; The voltage acquisition unit is used to acquire the current voltage of the light source equivalent unit; the voltage adjustment unit is used to adjust the voltage of the light source equivalent unit according to the current voltage and the analog light source control signal to adjust the brightness of the target light source.

3. The light source control circuit according to claim 2, wherein: The light source control circuit further includes: a switch driving module; The switch driving module is electrically connected to the control module and the voltage regulating unit; The control module is further configured to send a switch control signal; the switch driving module is configured to control the signal processing state of the voltage regulating unit in response to the switch control signal, so as to control the response time of the voltage regulating unit to the analog light source control signal.

4. The light source control circuit according to claim 3, characterized in that: The voltage acquisition unit includes: a first operational amplifier and a second operational amplifier; the voltage regulation unit includes: a third operational amplifier; The inverting input terminal of the second operational amplifier is electrically connected to the target light source, the output terminal of the second operational amplifier is electrically connected to the non-inverting input terminal of the second operational amplifier and the inverting input terminal of the first operational amplifier, the non-inverting input terminal of the first operational amplifier is electrically connected to the control module, the output terminal of the operational amplifier is electrically connected to the non-inverting input terminal of the third operational amplifier, the inverting input terminal of the third operational amplifier is electrically connected to the output terminal of the third operational amplifier, and the output terminal of the third operational amplifier is electrically connected to the target light source.

5. The light source control circuit according to claim 2, wherein: The light source control circuit further includes: a voltage limiting unit; The voltage limiting unit is electrically connected to the voltage acquisition unit; the voltage limiting unit is used to limit the voltage of the voltage acquisition unit.

6. The light source control circuit according to claim 5, characterized in that: The voltage limiting unit includes: a first diode and a second diode; The input end of the first diode and the output end of the second diode are electrically connected to the voltage acquisition unit, the output end of the first diode is grounded, and the input end of the second diode is grounded.

7. The light source control circuit according to claim 4, characterized in that: The light source control circuit further includes: a filtering and voltage stabilizing unit; The filtering and voltage stabilizing unit is electrically connected to the voltage acquisition unit and the voltage regulating unit; the filtering and voltage stabilizing unit is used to filter the signals of the voltage acquisition unit and the voltage regulating unit.

8. The light source control circuit according to claim 7, wherein: The filtering and voltage stabilizing unit includes: a first capacitor, a second capacitor and a polarity capacitor; One end of the first capacitor is electrically connected to the non-inverting input terminal of the first operational amplifier, and the other end of the first capacitor is electrically connected to the output terminal of the first operational amplifier; one end of the second capacitor is electrically connected to the inverting input terminal of the third operational amplifier, and the other end of the second capacitor is electrically connected to the non-inverting input terminal of the third operational amplifier; the positive electrode of the polar capacitor is electrically connected to the power supply terminal of the third operational amplifier, and the negative electrode of the polar capacitor is grounded.

9. The light source control circuit according to claim 1, wherein: The control module includes: a serial communication chip, a single chip microcomputer and a digital-to-analog conversion chip; The serial communication chip is electrically connected to the single-chip microcomputer, the single-chip microcomputer is electrically connected to the digital-to-analog conversion chip, and the digital-to-analog conversion chip is electrically connected to the feedback loop module; the serial communication chip is communicatively connected to the host computer; The serial communication chip is used to receive the light source adjustment instructions sent by the host computer, and send the light source adjustment instructions to the single-chip microcomputer through serial communication; the single-chip microcomputer is used to parse the light source adjustment instructions to obtain a digital light source control signal; the digital-to-analog conversion chip is used to perform digital-to-analog conversion on the digital light source control signal to obtain the analog light source control signal.

10. A light source control system, characterized in that: The light source control system comprises: a light source controller, a target light source, a camera device and a host computer; the light source controller has the light source control circuit according to any one of claims 1 to 9; The host computer is communicatively connected to the light source controller and the camera device, and the light source controller is electrically connected to the target light source; The host computer is used to send a light source trigger signal and a camera trigger signal; the light source control circuit is used to control the target light source to perform a light-emitting action in a target time period in response to the light source trigger signal; the camera device is used to perform a photo taking action in the target time period in response to the camera trigger signal.

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