Light supplementing circuit and electronic equipment
Through the cooperation of the light sensing circuit and the driving circuit, the low power consumption and low strobe brightness of white light fill light in IPC are achieved, solving the problems of high power consumption and high strobe brightness in the prior art, and providing a more comfortable fill light effect.
Patent Information
- Application Number
- CN202422023764.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-20
- Publication Date
- 2025-07-11
- Estimated Expiration
- 2034-08-20
AI Technical Summary
The existing white light fill light method consumes high power and has high strobe brightness in IPC, which is easy to disturb people and be dazzling.
The light sensing circuit is used to detect the ambient light intensity, the driving circuit adjusts the sampling current according to the light detection signal, the light emitting circuit emits light under the excitation of the driving current, and controls the emission time and brightness through the control circuit to realize the second-order lighting method, reducing power consumption and strobe brightness.
It reduces the power consumption of fill light circuits, reduces strobe brightness, and avoids disturbing and dazzling problems.
Smart Images
Figure CN223093839U_ABST
Abstract
Description
Technical Field
[0001] This application belongs to the field of imaging technology, and particularly relates to a fill light circuit and an electronic device. Background Art
[0002] An always on video (AOV) IP camera captures only one photo per second. Compared with conventional models, the sensor only needs to be exposed once per second, and the exposure time is generally from 24 ms to 128 ms. The sensor does not need to be exposed for the rest of the time.
[0003] For night scenes, white light filling is one of the common filling methods for IP cameras. There are two specific implementation methods. The first method is to use a white light lamp to be constantly on. Compared with the sensor exposure time, the proportion of time when the white light is not utilized is long, and the power consumption is high. The second method is white light lamp stroboscopic filling, but the white light lamp is visible to the human eye, the stroboscopic brightness is high, and it is easy to disturb residents and cause glare.
[0004] Therefore, there is an urgent need for a fill light circuit with low power consumption, reduced stroboscopic brightness, and not easy to disturb residents and cause glare. Utility Model Content
[0005] The purpose of this application is to provide a fill light circuit and an electronic device, aiming to solve the problems of high power consumption and high stroboscopic brightness of the existing white light filling, which are easy to disturb residents and cause glare.
[0006] The embodiment of this application provides a fill light circuit, including:
[0007] A light sensing circuit for detecting the light intensity of ambient light to output a light detection signal;
[0008] A driving circuit connected to the light sensing circuit, configured to respond to a trigger signal, adjust its sampling current according to a first control signal and the light detection signal, and output a driving current according to the feedback of the sampling current;
[0009] A first light emitting circuit connected to the driving circuit, configured to emit light under the excitation of the driving current.
[0010] In one embodiment, the fill light circuit further includes:
[0011] A control circuit connected to the driving circuit, configured to output the trigger signal, output the first control signal after a first preset duration of outputting the trigger signal, and stop outputting the trigger signal after a second preset duration of outputting the trigger signal, where the first preset duration is less than the second preset duration.
[0012] In one embodiment, the control circuit includes a microprocessor;
[0013] The first general input / output terminal of the microprocessor serves as the trigger signal output terminal of the control circuit and is connected to the drive circuit to output the trigger signal; the second general input / output terminal of the microprocessor serves as the first control signal output terminal of the control circuit and is connected to the drive circuit to output the first control signal.
[0014] In one embodiment, the control circuit is further configured to output a second control signal, and further includes:
[0015] A second light-emitting circuit, connected to the control circuit, configured to emit light according to the second control signal.
[0016] In one embodiment, the drive circuit includes:
[0017] An output module, connected to the light sensing circuit, configured to output an adjustment signal according to the first control signal and the light detection signal;
[0018] An adjustment module, connected to the output module, configured to adjust the sampling current of the drive module according to the adjustment signal;
[0019] The drive module, connected to the adjustment module and the first light-emitting circuit, is configured to respond to the trigger signal and output the drive current according to the feedback of the adjusted sampling current of itself.
[0020] In one embodiment, the drive module includes an LED driver, a first inductor, a first capacitor, a second capacitor, a second resistor, and a third resistor;
[0021] The enable terminal of the LED driver and the first end of the third resistor jointly serve as the trigger signal input terminal of the drive module to input the trigger signal; the bootstrap terminal of the LED driver is connected to the first end of the first capacitor, the power supply switch terminal of the LED driver is connected to the second end of the first capacitor and the first end of the first inductor, the second end of the first inductor serves as the drive current output terminal of the drive module and is connected to the first light-emitting circuit to output the drive current; the current detection terminal of the LED driver and the first end of the second resistor jointly serve as the sampling current input terminal of the drive module to input the sampling current; the voltage input terminal of the LED driver is connected to the first end of the second capacitor and the first power supply; the ground terminal of the LED driver and the second end of the second capacitor, the second end of the third resistor, and the second end of the second resistor are jointly connected to the power ground.
[0022] In one embodiment, the output module includes a fourth resistor and a fifth resistor;
[0023] The first end of the fifth resistor serves as the first control signal input terminal of the output module to input the first control signal; the first ends of the fourth resistor and the second end of the fifth resistor jointly serve as the optical detection signal input terminal of the output module and are connected to the optical sensing circuit to input the optical detection signal; the second end of the fourth resistor is connected to the power ground.
[0024] In one embodiment, the adjustment module includes a first field-effect transistor and a first resistor;
[0025] The gate of the first field-effect transistor serves as the adjustment signal input terminal of the adjustment module and is connected to the output module to input the adjustment signal; the drain of the first field-effect transistor is connected to the first end of the first resistor, the second end of the first resistor is connected to the drive module, and the source of the first field-effect transistor is connected to the power ground.
[0026] In one embodiment, the optical sensing circuit includes a photoresistor;
[0027] The first end of the photoresistor is connected to a first power supply, and the second end of the photoresistor serves as the optical detection signal output terminal of the optical sensing circuit and is connected to the drive circuit to output the optical detection signal.
[0028] An embodiment of the present application further provides an electronic device, and the electronic device includes the above-mentioned fill light circuit.
[0029] The beneficial effects of the embodiment of the present application compared with the prior art are as follows: in the case of white light fill light required, the drive circuit outputs a drive current in response to a trigger signal, the first light-emitting circuit emits light under the excitation of the drive current, the optical sensing circuit detects the light intensity of the ambient light, and outputs an optical detection signal when the first light-emitting circuit emits light. The drive circuit adjusts its own sampling current according to the optical detection signal, and then outputs a drive current according to the feedback of the sampling current. The first light-emitting circuit adjusts its own brightness according to the drive current at this time. When the white light lamp is turned off after exposure, the drive circuit adjusts its own sampling current according to the first control signal, and outputs a drive current according to the feedback of the sampling current. The first light-emitting circuit adjusts its own brightness according to the drive current at this time. Then, the drive circuit stops outputting the drive current in response to the stop of the trigger signal, and the first light-emitting circuit is turned off; thus, a second-order lighting method is adopted both when the first light-emitting circuit is turned on and off. Compared with the existing constant lighting method, the power consumption of the fill light circuit is reduced; compared with the existing stroboscopic fill light method, the stroboscopic brightness is reduced, and it is not easy to disturb residents and cause glare. Description of the Drawings
[0030] To more clearly illustrate the technical application in the embodiments of the present application, the following will briefly introduce the accompanying drawings required for the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings.
[0031] Figure 1 FIG. 4 is a schematic structural diagram of a supplementary lighting circuit provided by an embodiment of the present application;
[0032] Figure 2 FIG. 5 is another schematic structural diagram of a supplementary lighting circuit provided by an embodiment of the present application;
[0033] Figure 3 FIG. 6 is another schematic structural diagram of a supplementary lighting circuit provided by an embodiment of the present application;
[0034] Figure 4 FIG. 7 is another schematic structural diagram of a supplementary lighting circuit provided by an embodiment of the present application;
[0035] Figure 5 FIG. 8 is a schematic circuit diagram of a partial example of a supplementary lighting circuit provided by an embodiment of the present application. Detailed Embodiments
[0036] In order to make the technical problems, technical solutions, and beneficial effects to be solved by the present application more clearly understood, the following further details the present application in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.
[0037] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.
[0038] It should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.
[0039] In addition, the terms "first" and "second" are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of this application, "a plurality of" means two or more unless otherwise specifically defined.
[0040] Figure 1 The structural schematic diagram of the supplementary lighting circuit provided by an embodiment of this application is shown. For ease of description, only the parts related to this embodiment are shown and are described in detail as follows:
[0041] The above-mentioned supplementary lighting circuit includes a light sensing circuit 10, a driving circuit 20, and a first light emitting circuit 30.
[0042] The light sensing circuit 10 is used to detect the light intensity of the ambient light to output a light detection signal.
[0043] The driving circuit 20 is connected to the light sensing circuit 10 and is used to respond to a trigger signal, adjust its own sampling current according to the first control signal and the light detection signal, and output a driving current according to the feedback of the sampling current.
[0044] The first light emitting circuit 30 is connected to the driving circuit 20 and is used to emit light under the excitation of the driving current.
[0045] In a specific implementation, the first light emitting circuit 30 may include two high-power, small-angle (such as 90°) white light illumination lamps.
[0046] It can be understood that when white light supplementary lighting is required, the driving circuit 20 outputs a driving current in response to the trigger signal, the first light emitting circuit 30 emits light under the excitation of the driving current, the light sensing circuit 10 detects the light intensity of the ambient light, outputs a light detection signal when the first light emitting circuit 30 emits light, the driving circuit 20 adjusts its own sampling current according to the light detection signal, and then outputs a driving current according to the feedback of the sampling current. The first light emitting circuit 30 adjusts its own brightness according to the driving current at this time; when the white light lamp is turned off after exposure, the driving circuit 20 adjusts its own sampling current according to the first control signal and outputs a driving current according to the feedback of the sampling current. The first light emitting circuit 30 adjusts its own brightness according to the driving current at this time, and then the driving circuit 20 stops outputting the driving current in response to the stop of the trigger signal, and the first light emitting circuit 30 is turned off. Thus, a second-order lighting method is adopted both when the first light emitting circuit 30 is turned on and off. Compared with the existing constant lighting method, the power consumption of the supplementary lighting circuit is reduced; compared with the existing stroboscopic supplementary lighting method, the stroboscopic brightness is reduced, and it is not easy to disturb residents and cause glare.
[0047] As an example rather than a limitation, such as Figure 2As shown, the fill light circuit further includes a control circuit 40 .
[0048] The control circuit 40 is connected to the driving circuit 20, and is configured to output a trigger signal, and output a first control signal after outputting the trigger signal for a first preset time length, and stop outputting the trigger signal after outputting the trigger signal for a second preset time length, wherein the first preset time length is less than the second preset time length.
[0049] Through the control circuit 40, the first preset time length and the second preset time length can be flexibly adjusted according to actual needs to adapt to different usage environments, thereby expanding the application scenarios of the fill light circuit.
[0050] By way of example and not limitation, Figure 3 As shown, the control circuit 40 is further configured to output a second control signal, and the fill light circuit further includes a second light-emitting circuit 50 .
[0051] The second light emitting circuit 50 is connected to the control circuit 40 and is configured to emit light according to a second control signal.
[0052] In a specific implementation, the second light emitting circuit 50 may include two left and right low-power, large-angle (eg, 130°) background white light lamps.
[0053] The first light-emitting circuit 30 adopts a two-stage lighting method when lighting up and shutting down, and the second light-emitting circuit 50 adopts a low-power white light lamp that is always on, thereby realizing the staggering of two white light lamps with different brightness and different angles, further reducing the glare caused by the stroboscopic effect of the first light-emitting circuit 30.
[0054] By way of example and not limitation, Figure 4 As shown, the driving circuit 20 includes an output module 21 , a regulating module 22 , and a driving module 23 .
[0055] The output module 21 is connected to the light sensing circuit 10 and is configured to output an adjustment signal according to the first control signal and the light detection signal.
[0056] The regulating module 22 is connected to the output module 21 and is configured to regulate the sampling current of the driving module 23 according to the regulating signal.
[0057] The driving module 23 is connected to the regulating module 22 and the first light-emitting circuit 30 , and is configured to output a driving current according to feedback of the regulated sampling current thereof in response to a trigger signal.
[0058] The adjustment of the driving current is achieved through the adjustment module 22 and the driving module 23, and the step-by-step lighting and step-by-step shut-down of the first light-emitting circuit 30 are achieved, thereby reducing the glare of the stroboscopic white light.
[0059] Figure 5The figure shows a partial example circuit structure of the light supplement circuit provided by the embodiments of the present application. For ease of description, only the parts related to the embodiments of the present application are shown and are described in detail as follows:
[0060] The control circuit 40 includes a microprocessor U1.
[0061] The first general input / output terminal P1.0 of the microprocessor U1 serves as the trigger signal output terminal of the control circuit 40 and is connected to the drive circuit 20 to output a trigger signal; the second general input / output terminal P1.1 of the microprocessor U1 serves as the first control signal output terminal of the control circuit 40 and is connected to the drive circuit 20 to output a first control signal.
[0062] This circuit is simple and reliable.
[0063] The drive module 23 includes an LED driver U2, a first inductor L1, a first capacitor C1, a second capacitor C2, a second resistor R2, and a third resistor R3.
[0064] The enable terminal EN of the LED driver U2 and the first end of the third resistor R3 jointly serve as the trigger signal input terminal of the drive module 23 to input a trigger signal; the bootstrap terminal BST of the LED driver U2 is connected to the first end of the first capacitor C1, the power supply switch terminal SW of the LED driver U2 is connected to the second end of the first capacitor C1 and the first end of the first inductor L1, the second end of the first inductor L1 serves as the drive current output terminal of the drive module 23 and is connected to the first light-emitting circuit 30 to output a drive current; the current detection terminal SEN of the LED driver U2 and the first end of the second resistor R2 jointly serve as the sampled current input terminal of the drive module 23 to input a sampled current; the voltage input terminal VIN of the LED driver U2 is connected to the first end of the second capacitor C2 and a first power supply; the ground terminal GND of the LED driver U2 and the second end of the second capacitor C2, the second end of the third resistor R3, and the second end of the second resistor R2 are jointly connected to the power supply ground.
[0065] In a specific implementation, the current detection terminal SEN of the LED driver U2 can be stably controlled at 100 mV, the resistance values of the first resistor R1 and the second resistor R2 can both be 1 Ω. Then, when the first field-effect transistor Q1 is off, the sampled current is 100 mA, and when the first field-effect transistor Q1 is on, the sampled current is 200 mA. Thus, the LED driver U2 can output a drive current according to the feedback of the sampled current.
[0066] The output module 21 includes a fourth resistor R4 and a fifth resistor R5.
[0067] The first end of the fifth resistor R5 serves as the first control signal input terminal of the output module 21 to input the first control signal; the first ends of the fourth resistor R4 and the second end of the fifth resistor R5 jointly serve as the optical detection signal input terminal of the output module 21 and are connected to the optical sensing circuit 10 to input the optical detection signal; the second end of the fourth resistor R4 is connected to the power ground.
[0068] This circuit consists only of resistors, with a simple design and easily obtainable components.
[0069] The adjustment module 22 includes a first field-effect transistor Q1 and a first resistor R1.
[0070] The gate of the first field-effect transistor Q1 serves as the adjustment signal input terminal of the adjustment module 22 and is connected to the output module 21 to input the adjustment signal; the drain of the first field-effect transistor Q1 is connected to the first end of the first resistor R1, the second end of the first resistor R1 is connected to the drive module 23, and the source of the first field-effect transistor Q1 is connected to the power ground.
[0071] The first field-effect transistor Q1 has a fast switching speed and low power consumption.
[0072] The optical sensing circuit 10 includes a photoresistor RT1.
[0073] The first end of the photoresistor RT1 is connected to the first power supply, and the second end of the photoresistor RT1 serves as the optical detection signal output terminal of the optical sensing circuit 10 and is connected to the drive circuit 20 to output the optical detection signal.
[0074] The photoresistor RT1 has high sensitivity and a fast response speed.
[0075] The first light-emitting circuit 30 includes a first light-emitting diode D1 and a second light-emitting diode D2.
[0076] The anodes of the first diode and the second diode jointly serve as the drive current input terminal of the first light-emitting circuit 30 and are connected to the drive circuit 20 to input the drive current; the cathodes of the first diode and the second diode jointly serve as the drive current output terminal of the first light-emitting circuit 30 and are connected to the drive circuit 20 to output the drive current.
[0077] Among them, the first light-emitting diode D1 and the second light-emitting diode D2 can be white light lamps.
[0078] The following further explains with reference to the working principle Figure 5 as shown below:
[0079] The microprocessor U1 outputs a second control signal to the second light-emitting circuit 50, and the second light-emitting circuit 50 emits light according to the second control signal.
[0080] In the case where white light supplementary lighting is required, a trigger signal is output from the first general input / output terminal P1.0 of the microprocessor U1 to the enable terminal EN of the LED driver U2 and the first terminal of the third resistor R3. In response to the trigger signal, the LED driver U2 starts to work, and under the combined action of the first capacitor C1 and the first inductor L1, a driving current is output to the positive electrodes of the first light-emitting diode D1 and the second diode. The first light-emitting diode D1 and the second light-emitting diode D2 start to emit light, and a current sampling signal (sampling current) is output from the negative electrodes of the first diode and the second diode to the current detection terminal SEN of the LED driver U2 and the first terminal of the second resistor R2. In one embodiment, at this time, the voltage of the current detection terminal SEN of the LED driver U2 is 100 mV, the second resistor R2 is 1 Ω, and the sampling current is 100 mA. The photoresistor RT1 detects the light intensity of the ambient light, and a light detection signal is output from the second terminal of the photoresistor RT1 to the first terminal of the fourth resistor R4 and the second terminal of the fifth resistor R5. The voltage at the first terminal of the fourth resistor R4 and the second terminal of the fifth resistor R5 rises (such as rising to 1.2 V), and the first field-effect transistor Q1 is turned on. The first resistor R1 and the second resistor R2 are connected in parallel. The first resistor R1 adjusts the sampling current (current sampling signal) of the LED driver U2 according to the adjustment signal. In one embodiment, the resistance value of the first resistor R1 is 1 Ω, the resistance of the current detection terminal SEN of the LED driver U2 drops from 1 Ω to 0.5 Ω. At this time, the current sampling signal is 50 mV. To maintain the voltage of the current detection terminal SEN of the LED driver U2 stable at 100 mV, the driving current rises to 200 mA, that is, the LED driver U2 increases its own driving current according to the feedback of the adjusted sampling current (current sampling signal), and the brightness of the first light-emitting diode D1 and the second light-emitting diode D2 rises, completing the second-order lighting.
[0081] After the first preset duration, that is, when the white light lamp is turned off after the sensor is exposed, a first control signal with a low level is output from the second general input / output terminal P1.1 of the microprocessor U1 to the first terminal of the fifth resistor R5. The voltage at the first terminal of the fourth resistor R4 and the second terminal of the fifth resistor R5 drops (for example, drops to 0), the first field-effect transistor Q1 is turned off, and the first resistor R1 is disconnected. In one embodiment, the resistance of the current detection terminal SEN of the LED driver U2 rises from 0.5 Ω to 1 Ω, the sampling current drops to 100 mA, and the brightness of the first light-emitting diode D1 and the second light-emitting diode D2 drops. After the second preset duration, that is, when entering the one-frame-per-second sleep mode, the control circuit 40 stops outputting the trigger signal, and the first light-emitting diode D1 and the second light-emitting diode D2 complete the second-order turn-off.
[0082] The embodiment of the present application also provides an electronic device, and the electronic device includes the above-mentioned supplementary lighting circuit.
[0083] It should be understood that the sequence numbers of the steps in the above embodiments do not imply the order of execution, and the execution order of each process should be determined according to its function and internal logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.
[0084] The above embodiments are only used to illustrate the technical solutions of the present application, rather than limiting them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.
Claims
1. A supplementary lighting circuit, characterized in that, Comprising: A light sensing circuit for detecting the light intensity of ambient light to output a light detection signal; A driving circuit connected to the light sensing circuit, configured to respond to a trigger signal, adjust its own sampling current according to a first control signal and the light detection signal, and output a driving current according to the feedback of the sampling current; A first light emitting circuit connected to the driving circuit, configured to emit light under the excitation of the driving current.
2. The supplementary lighting circuit according to claim 1, wherein Further comprising: A control circuit connected to the driving circuit, configured to output the trigger signal, output the first control signal after a first preset duration of outputting the trigger signal, and stop outputting the trigger signal after a second preset duration of outputting the trigger signal, wherein the first preset duration is less than the second preset duration.
3. The supplementary lighting circuit according to claim 2, wherein The control circuit includes a microprocessor; A first general input / output terminal of the microprocessor serves as the trigger signal output terminal of the control circuit and is connected to the driving circuit to output the trigger signal; a second general input / output terminal of the microprocessor serves as the first control signal output terminal of the control circuit and is connected to the driving circuit to output the first control signal.
4. The supplementary lighting circuit according to claim 2, wherein The control circuit is further configured to output a second control signal, and further comprising: A second light emitting circuit connected to the control circuit, configured to emit light according to the second control signal.
5. The supplementary lighting circuit according to claim 1, wherein The driving circuit includes: An output module connected to the light sensing circuit, configured to output an adjustment signal according to the first control signal and the light detection signal; An adjustment module connected to the output module, configured to adjust the sampling current of the driving module according to the adjustment signal; The driving module, connected to the adjustment module and the first light emitting circuit, configured to respond to the trigger signal and output the driving current according to the feedback of its adjusted sampling current.
6. The supplementary lighting circuit according to claim 5, wherein The driving module includes an LED driver, a first inductor, a first capacitor, a second capacitor, a second resistor, and a third resistor; An enable terminal of the LED driver and a first end of the third resistor jointly serve as the trigger signal input terminal of the driving module to input the trigger signal; A bootstrap terminal of the LED driver is connected to a first end of the first capacitor, a power supply switch terminal of the LED driver is connected to a second end of the first capacitor and a first end of the first inductor, a second end of the first inductor serves as the driving current output terminal of the driving module and is connected to the first light emitting circuit to output the driving current; A current detection terminal of the LED driver and a first end of the second resistor jointly serve as the sampling current input terminal of the driving module to input the sampling current; A voltage input terminal of the LED driver is connected to a first end of the second capacitor and a first power supply; a ground terminal of the LED driver and a second end of the second capacitor, a second end of the third resistor, and a second end of the second resistor are jointly connected to the power supply ground.
7. The supplementary lighting circuit according to claim 5, wherein The output module includes a fourth resistor and a fifth resistor; The first end of the fifth resistor serves as the first control signal input terminal of the output module to input the first control signal; the first end of the fourth resistor and the second end of the fifth resistor jointly serve as the optical detection signal input terminal of the output module and are connected to the optical sensing circuit to input the optical detection signal; the second end of the fourth resistor is connected to the power ground.
8. The supplementary lighting circuit according to claim 5, wherein The adjustment module includes a first field-effect transistor and a first resistor; The gate of the first field-effect transistor serves as the adjustment signal input terminal of the adjustment module and is connected to the output module to input the adjustment signal; the drain of the first field-effect transistor is connected to the first end of the first resistor, the second end of the first resistor is connected to the driving module, and the source of the first field-effect transistor is connected to the power ground.
9. The supplementary lighting circuit according to claim 1, wherein The optical sensing circuit includes a photoresistor; The first end of the photoresistor is connected to the first power supply, and the second end of the photoresistor serves as the optical detection signal output terminal of the optical sensing circuit and is connected to the driving circuit to output the optical detection signal.
10. An electronic device, characterized in that, It includes the supplementary lighting circuit according to any one of claims 1 to 9.