Laser receiving circuit and electronic equipment

Abstract

The utility model relates to the technical field of laser receiving, and discloses a laser receiving circuit and electronic equipment, and the laser receiving circuit comprises a laser receiver, a switch conversion module and a comparison operational amplifier module. The switch conversion module is respectively connected with the laser receiver and the comparison operational amplifier module; the switch conversion module comprises a first conversion branch and a second conversion branch which respectively support access of different resistance values; the laser receiver is used for receiving a laser illumination signal, and the laser illumination signal is converted through the first conversion branch to obtain a first voltage signal input to the comparison operational amplifier module; the second conversion branch is used for providing a second voltage signal input to the comparison operational amplifier module; and the comparison operational amplifier module is used for outputting a level signal for indicating laser receiving when the first voltage signal is greater than the second voltage signal. The laser receiving circuit can detect laser illumination signals in different illumination scenes, meets the application requirements of multiple products, reduces the repeated design and management of multiple circuits, and reduces the maintenance cost.

Description

Technical Field

[0001] This application relates to the field of laser receiving technology, and more particularly to a laser receiving circuit and electronic device. Background Technology

[0002] A laser receiving circuit is a circuit that converts received laser signals into electrical signals and outputs a level signal when laser light is detected. Its core function is to capture laser signals and, after signal processing, output a clear high or low level signal to trigger subsequent control logic or an alarm system. Currently available laser receiving and processing circuits only use a fixed resistor circuit. This design can only detect laser illuminance within a certain range, which has limitations. When the ambient light in the location or environment varies greatly, the product may not function properly, leading to many incorrect judgments. Utility Model Content

[0003] In view of this, embodiments of this application provide a laser receiving circuit and electronic device that can effectively solve the problem of inflexible adaptation to multiple application scenarios.

[0004] In a first aspect, embodiments of this application provide a laser receiving circuit, including: a laser receiver, a switching module, and a comparator operational amplifier module;

[0005] The switching module is connected to the laser receiver and the comparator operational amplifier module respectively. The switching module includes a first conversion branch and a second conversion branch that respectively support different resistance values.

[0006] The laser receiver is used to receive laser light signals and convert them through the first conversion branch to obtain a first voltage signal input to the comparator operational amplifier module.

[0007] The second conversion branch is used to provide a second voltage signal input to the comparator operational amplifier module;

[0008] The comparator operational amplifier module is used to output a level signal indicating laser reception when the first voltage signal is greater than the second voltage signal.

[0009] In a first possible embodiment of the first aspect, the first conversion branch includes multiple first switch access units arranged in parallel, and the second conversion branch includes multiple second switch access units arranged in parallel;

[0010] The first parallel nodes of the plurality of first switch access units are respectively connected to the laser receiver and the comparator operational amplifier module, and the second parallel nodes of the plurality of first switch access units are grounded;

[0011] The first parallel node of the plurality of second switch access units is connected to the power supply, and the second parallel node of the plurality of second switch access units is connected to the comparator operational amplifier module.

[0012] In a second possible embodiment of the first aspect, at least one of the switch access units is activated in each of the switching branches.

[0013] In a third possible embodiment of the first aspect, each of the switch access units includes an access resistor and a switch connected in series;

[0014] When the switch is in the ON state, the connection resistor is in the ON state;

[0015] When the switch is in the off state, the connection resistor is in the unconnected state.

[0016] In a fourth possible embodiment of the first aspect, the switching states in each of the switching branches are configured according to the type of lighting environment scene in which the circuit is located.

[0017] In a fifth possible embodiment of the first aspect, the comparator operational amplifier module includes a comparator, a feedback resistor, a first matching resistor, and a second matching resistor;

[0018] The non-inverting input of the comparator is connected to the first terminal of the first matching resistor, the inverting input of the comparator is connected to the first terminal of the second matching resistor, the second terminal of the first matching resistor is connected to the laser receiver, and the second terminal of the second matching resistor is grounded.

[0019] The first end of the feedback resistor is connected to the non-inverting input of the comparator, and the second end of the feedback resistor is connected to the output of the comparator.

[0020] In a sixth possible embodiment of the first aspect, the comparator operational amplifier module further includes an output resistor;

[0021] The output terminal of the comparator is connected to the output resistor.

[0022] In a seventh possible embodiment of the first aspect, the comparator is an in-phase hysteresis comparator.

[0023] Secondly, embodiments of this application provide an electronic device, including a laser emitting source and the laser receiving circuit described above.

[0024] In a first possible embodiment of the second aspect, the laser emission source is a red laser emission source.

[0025] The embodiments of this application have the following beneficial effects:

[0026] An embodiment of this application provides a laser receiving circuit, comprising: a laser receiver, a switching module, and a comparator operational amplifier module. The switching module is connected to both the laser receiver and the comparator operational amplifier module, and includes a first conversion branch and a second conversion branch that support different resistance values. The laser receiver receives a laser illumination signal and converts it through the first conversion branch to obtain a first voltage signal input to the comparator operational amplifier module. The second conversion branch provides a second voltage signal input to the comparator operational amplifier module. The comparator operational amplifier module outputs a level signal indicating laser reception when the first voltage signal is greater than the second voltage signal. Based on the above scheme, the laser receiving circuit of this application controls the resistance value of the actual connected circuit trunk through the switching module, enabling it to receive laser illumination signals under different lighting scenarios and output a level signal to indicate laser reception. This meets the application needs of multiple products, reduces the repetitive design and management of various PCB circuits, and reduces maintenance costs. Attached Figure Description

[0027] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 A schematic diagram of a first structure of the laser receiving circuit according to an embodiment of this application is shown;

[0029] Figure 2 A second structural schematic diagram of the laser receiving circuit according to an embodiment of this application is shown;

[0030] Figure 3 A circuit diagram of a laser receiving circuit according to an embodiment of this application is shown;

[0031] Figure 4 A schematic diagram of the structure of an electronic device according to an embodiment of this application is shown.

[0032] Explanation of key component symbols:

[0033] 10 - Electronic equipment; 11 - Laser emission source; 100 - Laser receiving circuit; 110 - Laser receiver; 120 - Switch conversion module; 121 - First conversion branch; 1211 - First switch access unit; 122 - Second conversion branch; 1221 - Second switch access unit; 130 - Comparator operational amplifier module. Detailed Implementation

[0034] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0035] The components of the embodiments of this application described and illustrated in the accompanying drawings can be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of this application provided in the drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0036] In the following text, the terms "comprising," "having," and their cognates, which may be used in various embodiments of this application, are intended only to indicate a particular feature, number, step, operation, element, component, or combination thereof, and should not be construed as primarily excluding the presence of one or more other features, numbers, steps, operations, elements, components, or combinations thereof, or adding the possibility of one or more combinations thereof. Furthermore, the terms "first," "second," "third," etc., are used only for distinguishing descriptions and should not be construed as indicating or implying relative importance.

[0037] Unless otherwise specified, all terms used herein (including technical and scientific terms) shall have the same meaning as commonly understood by one of ordinary skill in the art to which the various embodiments of this application pertain. Terms (such as those defined in commonly used dictionaries) shall be interpreted as having the same meaning as in their contextual meaning in the relevant technical field and shall not be construed as having an idealized or overly formal meaning, unless clearly defined in the various embodiments of this application.

[0038] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0039] Please refer to Figure 1This is a schematic diagram of a laser receiving circuit 100 according to an embodiment of this application. Exemplarily, the laser receiving circuit 100 includes a laser receiver 110, a switching module 120, and a comparator operational amplifier module 130. The switching module 120 is connected to both the laser receiver 110 and the comparator operational amplifier module 130. The switching module 120 includes a first conversion branch 121 and a second conversion branch 122 that support different resistance values. Specifically, the laser receiver 110 is connected to both the first conversion branch 121 and one input terminal of the comparator operational amplifier module 130, and the second conversion branch 122 is connected to the power supply VCC and the other input terminal of the comparator operational amplifier module 130. The output terminal of the comparator operational amplifier module 130 serves as the output terminal of the laser receiving circuit 100, used to output a corresponding level signal to perform corresponding functional operations.

[0040] It is understood that the laser receiving circuit 100 is used to detect the laser illumination signal and output a corresponding level signal. For example, the level signal can be used to wake up the electronic device 10, so that the electronic device 10 can enter the working state or perform corresponding control operations.

[0041] like Figure 2 As shown in this embodiment, the laser receiver 110 receives laser illumination signals and converts them through a first conversion branch 121 to obtain a first voltage signal input to the comparator operational amplifier module 130. The laser receiver 110 can receive laser illumination signals emitted by the laser emitter 11 under different scenarios. Based on the received laser illumination signal, it is turned on, and power current is applied to the first conversion branch 121 so that the first conversion branch 121 outputs a first voltage signal after voltage division and conversion. A second conversion branch 122 provides a second voltage signal input to the comparator operational amplifier module 130. The comparator operational amplifier module 130 outputs a level signal indicating laser reception when the first voltage signal is greater than the second voltage signal. Under different illumination scenarios, the input voltage across the comparator operational amplifier module 130 is adjusted and controlled through the first conversion branch 121 and the second conversion branch 122 to make it suitable for illumination scenarios with different ambient light intensities.

[0042] The different level signals indicate whether a laser is detected. For example, when the comparator operational amplifier module 130 outputs a high-level signal, it means that a laser is detected, and when the comparator operational amplifier module 130 outputs a low-level signal, it means that a laser is not detected.

[0043] To better understand the laser receiving circuit 100, the various components of the laser receiving circuit 100 will be described in detail below.

[0044] Exemplarily, the laser receiver 110 turns on its internal transistor Q1 based on the received laser illumination signal, thereby loading current into the first conversion branch 121. For example, in one embodiment, the laser receiver includes a transistor Q1; the collector of transistor Q1 is connected to the connection node of the power supply VCC and the second conversion branch 122, the emitter of transistor Q1 is connected to the first conversion branch 121, and the base of transistor Q1 is the laser illumination signal receiving window.

[0045] In this embodiment, the base of the transistor Q1 built into the laser receiver receives the laser light. When the laser illuminance reaches a preset threshold, the transistor Q1 enters the conducting state. The power supply current provided by power supply VCC flows to the first conversion branch 121 through the conducting transistor Q1.

[0046] In one embodiment, the first conversion branch 121 includes multiple first switch access units 1211 connected in parallel, and the second conversion branch 122 includes multiple second switch access units 1221 connected in parallel. Specifically, the first parallel nodes of the multiple first switch access units 1211 are respectively connected to the laser receiver 110 and the comparator operational amplifier module 130, and the second parallel nodes of the multiple first switch access units 1211 are grounded to GND. The first parallel nodes of the multiple second switch access units 1221 are connected to the power supply VCC, and the second parallel nodes of the multiple second switch access units 1221 are connected to the comparator operational amplifier module 130.

[0047] In this embodiment, the number of the first switch access unit 1211 and the second switch access unit 1221 can be flexibly set. The on and off states of the switches and the resistance values ​​of the access resistors in the switch access units can also be flexibly set to meet the application requirements of different lighting scenarios. In different scenarios or locations, the ambient light intensity of the space itself is different, which causes the laser receiver 110 to be affected by the ambient light intensity, resulting in a large misjudgment of the final output. Therefore, different access resistor and switch settings need to be pre-configured for different scenarios or locations. It should be noted that in any scenario, at least one switch access unit should be connected in each conversion branch to ensure the normal operation of the circuit.

[0048] In one embodiment, each switch access unit includes an access resistor and a switch connected in series. When the switch is in the ON state, the access resistor is in the ON state; when the switch is in the OFF state, the access resistor is in the OFF state. The switch includes, but is not limited to, push-button switches, DIP switches, rotary switches, etc., and is not limited here. This application connects the access resistors corresponding to each switch to the circuit by setting the switch states of each switch in the first conversion branch 121 and the second conversion branch 122, ensuring simple user operation and accurate and efficient connection of the required resistors to the circuit.

[0049] In one embodiment, at least one switch access unit is activated in each conversion branch. To increase the applicability of the laser receiving circuit 100 to various lighting scenarios, this application takes the example of activating two switch access units in each conversion branch, such as... Figure 3 As shown, the first conversion branch 121 includes two first switch access units 1211, each consisting of a first switch SW1, a second switch SW2, a first access resistor R1, and a second access resistor R2. The first switch SW1 and the first access resistor R1 are connected in series to form one first switch access unit 1211, and the second switch SW2 and the second access resistor R2 are connected in series to form another first switch access unit 1211. One end of the two first switch access units 1211 connected in parallel is connected to the laser receiver 110, and the other end is grounded (GND).

[0050] The second conversion branch 122 includes two second switch access units 1221, each consisting of a third switch SW3, a fourth switch SW4, a third access resistor R3, and a fourth access resistor R4. The third switch SW3 and the third access resistor R3 are connected in series to form one second switch access unit 1221. The fourth switch SW4 and the fourth voltage divider resistor R4 are connected in series to form another second switch access unit 1221. One end of each of the two second switch access units 1221 is connected to the power supply VCC, and the other end is connected to the comparator operational amplifier module 130.

[0051] In this embodiment, the first voltage signal at the non-inverting input of comparator D1 in the comparator operational amplifier module 130 is determined by the first conversion branch 121, and the second voltage signal at the inverting input of comparator D1 in the comparator operational amplifier module 130 is determined by the second conversion branch 122. When the resistance value of the non-inverting input of comparator D1 is smaller and the resistance value of the inverting input is larger, the laser receiving circuit 100 can receive a smaller laser illumination in a darker environment, and the circuit has strong light sensitivity. If comparator D1 outputs a high-level signal to indicate that laser light has been received, then it is easier for comparator D1 to output a high-level signal at this time. For example, when both switches SW1 and SW2 in the first conversion branch 121 are in the on state, the connection resistance of the non-inverting input terminal of comparator D1 is the smallest, which is only R12 = (R1*R2) / (R1+R2) = 8.25K. When only switch SW3 in the second conversion branch 122 is in the on state, the connection resistance R34 of the inverting input terminal of comparator D1 is 47K. At this time, only a laser light signal with a value of 5LUX is needed to trigger the comparator operational amplifier module 130 to output a high-level signal.

[0052] It is understandable that in darker environments, the switch module 120 can be set to "high sensitivity mode," meaning the resistance value of the input resistor at the non-inverting input of the comparator operational amplifier module 130 is adjusted to be less than the resistance value at the inverting input. This allows even low-intensity laser light signals to be detected. For example, in a dark parking lot, where environmental interference with laser light signals is minimal, the switch module 120 needs to be set to "high sensitivity mode." Upon receiving a low-intensity laser light signal, the comparator operational amplifier module 130 will output a corresponding level signal to indicate that laser light has been received. In brighter environments, the switch module 120 can be set to "low sensitivity mode," meaning the resistance value of the input resistor at the non-inverting input of the comparator operational amplifier module 130 is adjusted to be greater than the resistance value at the inverting input, thus avoiding interference from strong ambient light. For example, in a bright outdoor scene on a sunny day, the environment has a greater impact on the laser light signal. The switch conversion module 120 needs to be set to "low sensitivity mode" so that the comparator operational amplifier module 130 can output a corresponding level signal to indicate that the laser has been received when it receives a laser light signal with a large illuminance, under the condition of eliminating environmental interference.

[0053] In one embodiment, when the laser receiving circuit 100 is in different lighting scenarios, the switching states of each switch branch are configured according to the type of lighting environment scenario in which the laser receiving circuit 100 is located.

[0054] In this embodiment, the on / off states of the switches can be pre-configured for different scenarios or locations to determine the resistance involved in the actual circuit. Generally, it is considered that selecting switch SWx, i.e., when switch SWx is turned to the ON position, indicates that the circuit is connected. Taking the circuit design in which each of the above conversion branches includes two switch access units, i.e., four switches (SW1-SW4) and four resistors (R1-R4), as an example: In a parking lot, selecting switches SW3, SW2, and SW1 can detect a minimum illuminance of 5 LUX for the laser light signal. In a restaurant, selecting switches SW4, SW2, and SW1 can detect a minimum illuminance of 10 LUX for the laser light signal. In a cloudy indoor location, selecting switches SW3 and SW2 can detect a minimum illuminance of 50 LUX for the laser light signal. In a production workshop, selecting switches SW4 and SW2 can detect a minimum illuminance of 500 LUX for the laser light signal. In an office setting, selecting switches SW3 and SW1 will detect a minimum laser light intensity of 1000 LUX. In a cloudy outdoor setting, selecting switches SW4 and SW1 will detect a minimum laser light intensity of 1500 LUX. In a sunny indoor setting, selecting switches SW4, SW3, and SW2 will detect a minimum laser light intensity of 2000 LUX. In a sunny outdoor setting, selecting switches SW4, SW3, and SW1 will detect a minimum laser light intensity of 5000 LUX.

[0055] It is understood that the laser receiving circuit 100 of this application can pre-set the on and off states of the switch in different scenarios to configure laser detection under different lighting conditions, which facilitates user operation, improves product usability, reduces the generation of errors, improves product efficiency and accuracy, and enhances user experience.

[0056] In one embodiment, the comparator operational amplifier module 130 includes a comparator D1, a feedback resistor R6, a first matching resistor R7, and a second matching resistor R8. Specifically, the non-inverting input of comparator D1 is connected to the first terminal of the first matching resistor R7, the inverting input of comparator D1 is connected to the first terminal of the second matching resistor R8, the second terminal of the first matching resistor R7 is connected to the laser receiver 110, and the second terminal of the second matching resistor R8 is grounded (GND). The first terminal of the feedback resistor R6 is connected to the non-inverting input of comparator D1, and the second terminal of the feedback resistor R6 is connected to the output of comparator D1.

[0057] In this embodiment, comparator D1 compares the voltage signals at the non-inverting and inverting input terminals, and outputs a level signal when laser irradiation is present, indicating the presence of a laser signal, causing the electronic device 10 to perform corresponding functional operations. The first matching resistor R7 and the second matching resistor R8 serve as the connection resistors between the non-inverting and inverting input terminals of comparator D1, protecting the laser receiving circuit 100 under critical conditions. For example, when all switches in the switch conversion module 120 are in the off state, the first matching resistor R7 and the second matching resistor R8 can participate in the voltage division of the non-inverting and inverting input terminal circuits, protecting the components in the laser receiving circuit 100 from damage caused by large currents.

[0058] In this embodiment, comparator D1 is a non-inverting hysteresis comparator. Feedback resistor R6 forms a positive feedback loop, introducing hysteresis by adjusting the voltage offset at the non-inverting input. For example, when the voltage at the non-inverting input of comparator D1 is greater than the voltage at the inverting input, the output is a high-level signal. Feedback resistor R6 injects a portion of the output current into the non-inverting input, increasing its voltage. Conversely, when the voltage at the non-inverting input is less than the voltage at the inverting input, the output is a low-level signal. Feedback resistor R6 lowers the voltage at the non-inverting input. This positive feedback mechanism gives comparator D1 two different switching thresholds (upper threshold and lower threshold), thus preventing frequent switching of the output signal level when the input voltage signal fluctuates near the threshold.

[0059] In another embodiment, the comparator operational amplifier module 130 further includes an output resistor R5. Specifically, the output terminal of comparator D1 is connected to the output resistor R5.

[0060] In this embodiment, different resistor values ​​connected to the laser receiving circuit 100 determine different required LUX values, eliminating interference from the light source itself in the scene or location, allowing the same electronic device 10 to be adapted to laser use in various scenes or locations. Furthermore, the reuse of some circuits reduces the number of components used, eliminating the need for expensive additional component management, and reducing overall product manufacturing and development costs.

[0061] Please refer to Figure 4This is a schematic diagram of a laser-receiving electronic device 10 according to an embodiment of this application. Exemplarily, the electronic device 10 includes a laser emitting source 11 and a laser receiving circuit 100. The input terminal of the laser receiving circuit 100 is directly or indirectly connected to the laser emitting source 11 to receive the laser illumination signal emitted by the laser emitting source 11. The output terminal of the laser receiving circuit 100 can be electrically connected to a processor inside the electronic device 10. Since the electronic device 10 of this application uses the aforementioned laser receiving circuit 100, it possesses all the advantages of the aforementioned laser receiving circuit 100. It is understood that the options in the above embodiments are also applicable to this embodiment, and therefore will not be described again here.

[0062] In this embodiment, the laser receiving circuit 100 enables the electronic device 10 to receive laser light signals of corresponding intensity under different lighting scenarios. Upon receiving the laser light, it wakes up the processor to perform corresponding functional operations, thus meeting the application requirements of the electronic device 10. Furthermore, the laser receiving circuit 100 does not require additional expensive device management, reducing the overall production and development costs of the electronic device 10.

[0063] The laser emitter 11 is the core device for generating laser light, converting input energy into a laser beam through a specific physical mechanism (such as stimulated emission). When the laser receiving circuit 100 receives the laser beam's illumination signal, it outputs a voltage level signal to the processor. The processor then executes specific operational logic based on the received voltage level signal, thereby fulfilling the system's functional requirements. For example, it may activate an alarm, send a notification, or control external devices. This electronic device 10 may include, but is not limited to, laser intelligent robots, laser beam detectors, and laser perimeter security equipment.

[0064] In one embodiment, the laser emission source is a red laser emission source. In this embodiment, the laser receiver may be interfered with by ambient light (such as sunlight, lamplight, etc.) or other non-target light sources. Using a red laser emission source can generate a laser light signal with a specific wavelength and intensity, enabling the laser receiving circuit 100 to more accurately identify the target laser light signal while ignoring other interfering light sources.

[0065] In the several embodiments provided in this application, it should be understood that the disclosed apparatus and methods can also be implemented in other ways. The apparatus embodiments described above are merely illustrative. For example, the flowcharts and block diagrams in the accompanying drawings show the architecture, functionality, and operation of possible implementations of apparatus, methods, and computer program products according to various embodiments of this application. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code, which contains one or more executable instructions for implementing a specified logical function. It should also be noted that, as an alternative implementation, the functions marked in the blocks may occur in a different order than those marked in the drawings. For example, two consecutive blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in the block diagram and / or flowchart, and combinations of blocks in the block diagram and / or flowchart, can be implemented using a dedicated hardware-based system that performs the specified function or action, or using a combination of dedicated hardware and computer instructions.

[0066] In addition, the functional modules or units in the various embodiments of this application can be integrated together to form an independent part, or each module can exist independently, or two or more modules can be integrated to form an independent part.

[0067] If a function is implemented as a software module and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a smartphone, personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of this application.

[0068] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application.

Claims

1. A laser receiving circuit, characterized in that, include: Laser receiver, switching module and comparator operational amplifier module; The switching module is connected to the laser receiver and the comparator operational amplifier module respectively. The switching module includes a first conversion branch and a second conversion branch that respectively support different resistance values. The laser receiver is used to receive laser light signals and convert them through the first conversion branch to obtain a first voltage signal input to the comparator operational amplifier module. The second conversion branch is used to provide a second voltage signal input to the comparator operational amplifier module; The comparator operational amplifier module is used to output a level signal indicating laser reception when the first voltage signal is greater than the second voltage signal.

2. The laser receiving circuit according to claim 1, characterized in that, The first conversion branch includes multiple first switch access units arranged in parallel, and the second conversion branch includes multiple second switch access units arranged in parallel; The first parallel nodes of the plurality of first switch access units are respectively connected to the laser receiver and the comparator operational amplifier module, and the second parallel nodes of the plurality of first switch access units are grounded; The first parallel node of the plurality of second switch access units is connected to the power supply, and the second parallel node of the plurality of second switch access units is connected to the comparator operational amplifier module.

3. The laser receiving circuit according to claim 2, characterized in that, At least one of the switch access units is connected in each of the conversion branches.

4. The laser receiving circuit according to claim 2, characterized in that, Each of the aforementioned switch access units includes an access resistor and a switch connected in series; When the switch is in the ON state, the connection resistor is in the ON state; When the switch is in the off state, the connection resistor is in the unconnected state.

5. The laser receiving circuit according to claim 1, characterized in that, Based on the type of lighting environment in which the circuit is located, configure the switching states of each switch in each of the conversion branches.

6. The laser receiving circuit according to claim 1, characterized in that, The comparator operational amplifier module includes a comparator, a feedback resistor, a first matching resistor, and a second matching resistor; The non-inverting input of the comparator is connected to the first terminal of the first matching resistor, the inverting input of the comparator is connected to the first terminal of the second matching resistor, the second terminal of the first matching resistor is connected to the laser receiver, and the second terminal of the second matching resistor is grounded. The first end of the feedback resistor is connected to the non-inverting input of the comparator, and the second end of the feedback resistor is connected to the output of the comparator.

7. The laser receiving circuit according to claim 6, characterized in that, The comparator operational amplifier module also includes an output resistor; The output terminal of the comparator is connected to the output resistor.

8. The laser receiving circuit according to claim 6, characterized in that, The comparator is an in-phase hysteresis comparator.

9. An electronic device, characterized in that, It includes a laser emitting source and a laser receiving circuit as described in any one of claims 1-8.

10. The electronic device according to claim 9, characterized in that, The laser emission source is a red laser emission source.

Images