Lighting circuits, lighting methods, devices and electronic equipment

Abstract

This application discloses a supplementary lighting circuit, supplementary lighting method, device, and electronic device, belonging to the field of communication technology. The supplementary lighting circuit includes: a photoelectric sensor, a supplementary light, a pulse width modulation (PWM) level conversion module, a PWM control module, a supplementary light driver chip, and a polymer dispersed liquid crystal (PDLC) layer. The light emitted from the supplementary light is emitted through the PDLC layer. The input terminal of the supplementary light driver chip is electrically connected to the photoelectric sensor, and the output terminal of the supplementary light driver chip is electrically connected to the supplementary light. The supplementary light driver chip is used to adjust the current of the supplementary light based on sensor data detected by the photoelectric sensor. The PWM control module is used to generate a PWM signal based on a reference voltage signal and a feedback voltage signal, wherein the feedback voltage signal is generated based on sensor data detected by the photoelectric sensor. The PWM level conversion module is also used to perform level conversion processing on the PWM signal, and the PWM signal after level conversion processing is used to control the PDLC layer to adjust the transmittance of the PDLC layer.

Description

Technical Field

[0001] This application belongs to the field of communication technology, specifically relating to a supplementary lighting circuit, supplementary lighting method, device, and electronic equipment. Background Technology

[0002] With the development of technology, the imaging requirements of mobile phones and other electronic devices are increasing in different environments and scenarios, and the need for supplementary lighting is also growing, especially in nighttime shooting and portrait photography. However, since the brightness and other parameters of supplementary lights are usually determined by the current of the supplementary light, conventional supplementary lighting solutions based on adjusting the current of the supplementary light are insufficient to meet the complex supplementary lighting needs.

[0003] It is evident that the supplementary lighting solutions in related technologies suffer from poor supplementary lighting effects. Summary of the Invention

[0004] The purpose of this application is to provide a supplementary lighting circuit, supplementary lighting method, device, and electronic device that can solve the problem of poor supplementary lighting effect in supplementary lighting solutions in related technologies.

[0005] To solve the above-mentioned technical problems, this application is implemented as follows:

[0006] In a first aspect, embodiments of this application provide a supplementary lighting circuit, including: a photoelectric sensor, a supplementary light, a pulse width modulation (PWM) level conversion module, a PWM control module, a supplementary light driver chip, and a polymer dispersed liquid crystal (PDLC) layer, wherein the light emitted by the supplementary light is emitted through the PDLC layer;

[0007] The input terminal of the fill light driver chip is electrically connected to the photoelectric sensor, the output terminal of the fill light driver chip is electrically connected to the fill light, and the fill light driver chip is used to adjust the current of the fill light based on the sensor data detected by the photoelectric sensor.

[0008] The PWM control module is used to generate a PWM signal based on a reference voltage signal and a feedback voltage signal, wherein the feedback voltage signal is generated based on sensor data detected by the photoelectric sensor.

[0009] The PWM level conversion module is also used to perform level conversion processing on the PWM signal, and the PWM signal after level conversion processing is used to control the PDLC layer to adjust the transmittance of the PDLC layer.

[0010] Secondly, embodiments of this application provide an electronic device including the supplementary lighting circuit described in the first aspect.

[0011] Thirdly, embodiments of this application provide a supplementary lighting method, applied to the supplementary lighting circuit described in the first aspect, or applied to the electronic device described in the second aspect, the method comprising:

[0012] Acquire sensor data detected by the photoelectric sensor;

[0013] The control parameters of the PDLC layer and the current parameters of the supplementary light are determined based on the sensor data.

[0014] The transmittance of the PDLC layer is adjusted based on the control parameters of the PDLC layer;

[0015] The current of the fill light is adjusted based on its current parameters.

[0016] Fourthly, embodiments of this application provide a supplementary lighting device, applied to the supplementary lighting circuit described in the first aspect, or applied to the electronic device described in the second aspect, the device comprising:

[0017] The acquisition module is used to acquire sensor data detected by the photoelectric sensor;

[0018] The determination module is used to determine the control parameters of the PDLC layer and the current parameters of the supplementary light based on the sensor data;

[0019] The first adjustment module is used to adjust the transmittance of the PDLC layer based on the control parameters of the PDLC layer;

[0020] The second adjustment module is used to adjust the current of the fill light based on the current parameters of the fill light.

[0021] Fifthly, embodiments of this application provide an electronic device including a processor and a memory, wherein the memory stores a program or instructions executable on the processor, and the program or instructions, when executed by the processor, implement the steps of the method described in the third aspect.

[0022] In a sixth aspect, embodiments of this application provide a readable storage medium on which a program or instructions are stored, which, when executed by a processor, implement the steps of the method described in the third aspect.

[0023] In a seventh aspect, embodiments of this application provide a chip, the chip including a processor and a communication interface, the communication interface being coupled to the processor, the processor being used to run programs or instructions to implement the method described in the third aspect.

[0024] Eighthly, embodiments of this application provide a computer program product including computer instructions that, when executed by a processor, implement the method described in the third aspect.

[0025] In this embodiment, by setting a PWM level conversion module, a PWM control module, and a PDLC layer, and using the PWM signal to control the PDLC layer to adjust the transmittance of the PDLC layer, the supplementary lighting circuit can not only adjust the brightness of the supplementary light based on the sensor data detected by the photoelectric sensor, but also control the PDLC layer based on the PWM signal to adjust the transmittance of the PDLC layer, effectively improving the light utilization rate of the supplementary light and enabling targeted supplementary lighting at different distances. Attached Figure Description

[0026] Figure 1 This is a structural diagram of the supplementary lighting circuit provided in the embodiments of this application;

[0027] Figure 2 yes Figure 1 The diagram shown is a structural diagram of the PWM control module.

[0028] Figure 3 This is a waveform diagram of the PWM control module provided in the embodiments of this application;

[0029] Figure 4 This is a flowchart of the supplemental lighting method provided in the embodiments of this application;

[0030] Figure 5a This is one of the schematic diagrams of supplemental lighting provided in the embodiments of this application;

[0031] Figure 5b This is the second schematic diagram of supplemental lighting provided in the embodiments of this application;

[0032] Figure 5c This is the third schematic diagram of supplementary lighting provided in the embodiments of this application;

[0033] Figure 5d This is the fourth schematic diagram of supplementary lighting provided in the embodiments of this application;

[0034] Figure 5e This is the fifth schematic diagram of supplemental lighting provided in the embodiments of this application;

[0035] Figure 5f This is a schematic diagram of lighting provided in an embodiment of this application;

[0036] Figure 6 This is a structural diagram of the supplementary lighting device provided in the embodiments of this application;

[0037] Figure 7 This is one of the structural diagrams of the electronic device provided in the embodiments of this application;

[0038] Figure 8 This is the second structural diagram of the electronic device provided in the embodiments of this application. Detailed Implementation

[0039] The technical solutions of 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, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0040] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0041] like Figure 1 and Figure 2 As shown, this application embodiment provides a supplementary lighting circuit, including: a photoelectric sensor 10, a supplementary light 20, a pulse width modulation (PWM) level conversion module 30, a PWM control module 40, a supplementary light driver chip 50, and a polymer dispersed liquid crystal (PDLC) layer 60.

[0042] The aforementioned photoelectric sensor 10 can be understood as a sensor used to convert light signals into electrical signals. For example, the intensity of ambient light can be sensed based on the sensor data detected by the photoelectric sensor 10, thereby realizing the detection of ambient light intensity.

[0043] The aforementioned fill light 20 can be understood as a light source device used to provide lighting or fill light functions, such as the flash or fill light on electronic devices like mobile phones.

[0044] In some embodiments, the supplementary light 20 can be a light-emitting diode (LED) light.

[0045] The aforementioned PWM level conversion module 30 can be understood as a functional module used to adjust or convert the level state of the PWM signal.

[0046] The aforementioned PWM control module 40 can be understood as a functional module used to output PWM signals.

[0047] The aforementioned fill light driver chip 50 can be understood as a driver device that adjusts the light intensity of the fill light 20 and can provide a current source for the fill light 20. For example, the current of the fill light 20 can be adjusted by the fill light driver chip 50 to achieve brightness adjustment of the fill light 20.

[0048] The aforementioned PDLC layer 60 can be understood as a functional device used to improve the light utilization rate of the supplementary light lamp 20 and to achieve long-distance supplementary lighting.

[0049] The basic working principle of the PDLC layer 60 is based on the millisecond-level switching response of liquid crystal molecules to an electric field. Moreover, the PDLC layer 60 includes a polymer matrix layer and multiple micron-sized liquid crystal molecules, which are randomly and irregularly dispersed in the polymer matrix layer.

[0050] When no electric field is applied to the liquid crystal molecules in the PDLC layer 60, the PDLC layer 60 can appear as a milky white opaque state. At this time, light will be scattered when it passes through the PDLC layer 60, and the PDLC layer 60 will have low transmittance and short illumination distance.

[0051] When an electric field is applied to the polymer matrix layer of the PDLC layer 60, the liquid crystal molecules in the PDLC layer 60 will rearrange along the direction of the electric field, and the PDLC layer 60 can become transparent. At this time, the scattering of light passing through the PDLC layer 60 is reduced, and the PDLC layer 60 has high transmittance and a long light irradiation distance.

[0052] In some embodiments, the deflection angle of liquid crystal molecules in the PDLC layer 60 can be controlled by controlling the magnitude of the electric field applied to the polymer matrix layer of the PDLC layer 60, thereby controlling the emission angle of light passing through the PDLC layer 60 and realizing the field of view (FOV) control of the optical path.

[0053] In some embodiments, the PDLC layer 60 may be disposed in the light emission direction of the fill light 20 so that the light emitted by the fill light 20 needs to pass through the PDLC layer 60 before being emitted.

[0054] In this application, the input terminal of the fill light driver chip 50 can be electrically connected to the photoelectric sensor 10, and the output terminal of the fill light driver chip 50 can be electrically connected to the fill light 20, so that the fill light driver chip 50 can adjust the current of the fill light 20 according to the sensor data detected by the photoelectric sensor 10.

[0055] The PWM control module 40 is used to generate a PWM signal based on a reference voltage signal and a feedback voltage signal, wherein the feedback voltage signal is generated from sensor data detected by the photoelectric sensor 10.

[0056] The PWM level conversion module 30 is used to perform level conversion processing on the PWM signal, and the PWM signal after level conversion processing is used to control the PDLC layer 60 to adjust the transmittance of the PDLC layer 60.

[0057] In this embodiment, by setting up a PWM level conversion module 30, a PWM control module 40, and a PDLC layer 60, and using PWM signals to control the PDLC layer 60, the transmittance of the PDLC layer 60 is adjusted. This allows the supplementary lighting circuit to not only adjust the brightness of the supplementary light 20 based on sensor data detected by the photoelectric sensor 10, but also to control the PDLC layer 60 based on PWM signals to adjust its transmittance. This effectively improves the light utilization rate of the supplementary light 20 and enables targeted supplementary lighting at different distances.

[0058] In some embodiments, the PWM control module 40 includes a feedback amplifier circuit 41, a dynamic comparison circuit 42, a first oscillation circuit 43, a second oscillation circuit 44, and a delay trigger circuit 45.

[0059] The input terminals of the feedback amplifier circuit 41 are respectively connected to the reference voltage signal and the feedback voltage signal. The output terminal of the feedback amplifier circuit 41 is electrically connected to the input terminal of the dynamic comparison circuit 42. The feedback amplifier circuit 41 is used to amplify the reference voltage signal and the feedback voltage signal and output the amplified result corresponding to the reference voltage signal and the feedback voltage signal.

[0060] The dynamic comparison circuit 42 is also electrically connected to the first oscillation circuit 43, and outputs a first dynamic comparison voltage corresponding to the amplification result under the action of the first oscillation signal output by the first oscillation circuit 43.

[0061] The delay trigger circuit 45 is used to output a PWM signal based on the first dynamic comparison voltage, the first oscillation signal, and the second oscillation signal output by the second oscillation circuit 44.

[0062] In this embodiment, the inputs of the feedback amplifier circuit 41 are the reference voltage signal and the feedback voltage signal. That is, in this application, the reference voltage signal and the feedback voltage signal are used as the input excitation of the PWM control module 40, which can effectively avoid the generation of static current and has low dynamic power consumption, thus reducing the power consumption required to output the PWM signal.

[0063] Both the first oscillation circuit 43 and the second oscillation circuit 44 can be self-oscillating circuits. After the excitation is generated, the oscillation circuit can cycle between its supply voltage (VCC) and 0 voltage to form a square wave generating circuit. Its frequency depends on the capacitor resistance value. By selecting different capacitor resistance values, square waves of different frequencies can be generated to serve as input signals for the dynamic comparison circuit 42 and the delay trigger circuit 45.

[0064] The first oscillation signal can be a square wave signal generated by the first oscillation circuit 43, and the second oscillation signal can be a square wave signal generated by the second oscillation circuit 44.

[0065] In some embodiments, the feedback amplifier circuit 41 includes an error amplifier, and the dynamic comparison circuit 42 includes a dynamic comparator;

[0066] The first input terminal of the error amplifier is connected to the reference voltage signal, the second input terminal of the error amplifier is connected to the feedback voltage signal, and the output terminal of the error amplifier is electrically connected to the first input terminal of the dynamic comparator. The error amplifier is used to amplify the reference voltage signal and the feedback voltage signal, and output the amplified result corresponding to the reference voltage signal and the feedback voltage signal.

[0067] The second input terminal of the dynamic comparator is connected to a reference signal. The dynamic comparator is also electrically connected to the first oscillation circuit. Under the action of the first oscillation signal output by the first oscillation circuit, the dynamic comparator outputs a first dynamic comparison voltage corresponding to the amplification result.

[0068] In some embodiments, the error amplifier can amplify the feedback voltage signal based on the reference voltage signal to meet the input requirements of the dynamic comparator.

[0069] In some embodiments, the amplification result output by the error amplifier and the reference signal can be compared and processed based on the first oscillation signal output by the first oscillation circuit 43, and a first dynamic comparison voltage can be output to improve the resolution of the overall circuit and reduce noise.

[0070] The aforementioned delayed trigger circuit 45 can take the second oscillation signal output by the second oscillation circuit 44 as input, and can be combined with a D flip-flop to output a PWM signal. By designing a delayed trigger, the generation of narrow pulses can be avoided, and false triggering will not occur.

[0071] The aforementioned D flip-flop can be an information storage device with memory function and two stable states.

[0072] The trigger has two stable states, 0 and 1, and can switch from one stable state to the other under the action of a certain external signal.

[0073] In some embodiments, the supplementary lighting circuit further includes a boost circuit 70. The input terminal of the boost circuit 70 is electrically connected to the photoelectric sensor 10, and the output terminal of the boost circuit 70 is electrically connected to the PWM level conversion module 30. The boost circuit 70 generates an ambient light coefficient voltage based on the sensor data detected by the photoelectric sensor 10, and the PWM level conversion module 30 can generate a feedback voltage signal based on the ambient light coefficient voltage output by the boost circuit 70.

[0074] In some embodiments, the reference voltage signal may be the reference voltage output by the boost circuit 70.

[0075] In some embodiments, the supplementary lighting circuit further includes a processor 80, the input terminal of which is electrically connected to the photoelectric sensor 10, and the output terminal of which is electrically connected to the input terminal of the boost circuit 70 and the input terminal of the supplementary lighting driver chip 50, respectively.

[0076] The aforementioned boost circuit 70 can output an adjustable voltage with an accuracy in the mV range to provide feedback input for controlling the electric field required by the liquid crystal molecules of the PDLC layer 60.

[0077] In some embodiments, sensor data detected by photoelectric sensor 10 can be fed back to boost circuit 70 based on a low-power sensor hub module inside processor 80, and a feedback input that can control the electric field required to control the liquid crystal molecules of PDLC layer 60 can be output.

[0078] The processor 80 can process the sensor data detected by the photoelectric sensor 10 to determine the brightness parameters of the supplementary light 20, the transmittance of the PDLC layer 60, etc.

[0079] In some embodiments, the PWM level conversion module 30 can merge the feedback input output by the boost circuit 70 with the PWM input and convert it into a voltage signal output with periodic changes in positive and negative polarity, thus avoiding the polarization of PDLC liquid crystal molecules after a long period of DC voltage application.

[0080] In some embodiments, after the user enables the PDLC function of the electronic device including the above-mentioned supplementary lighting circuit, the photoelectric sensor 10 detects sensor data and can transmit the sensor data to the low-power Sensor Hub module of the processor 80 based on the serial communication protocol. After the sensor data is processed by the low-power Sensor Hub module, an ambient light feedback signal is obtained, and the obtained ambient light feedback signal can be used as the input of the boost circuit 70. After the ambient light feedback signal is input to the boost circuit 70, the voltage VCC of the boost circuit will be triggered, and the ambient light coefficient voltage will be output to the PWM level conversion module 30.

[0081] The ambient light coefficient voltage can be directly written back to the PWM control module 40 from the storage unit of the PWM level conversion module 30, and the feedback voltage signal can be used as the input excitation of the PWM control module 40.

[0082] In some embodiments, the aforementioned storage unit may be a storage unit capable of writing and writing out.

[0083] In the PWM control module 40, the first oscillation circuit 43 and the second oscillation circuit 44 have started oscillating and output the first oscillation signal and the second oscillation signal at the design frequency. The feedback voltage signal and the reference voltage signal can output an error signal after passing through the error amplifier. The output error signal can be used as the positive input of the dynamic comparator and outputs the first dynamic comparison voltage under the control of the first oscillation signal. Through the design of the NAND gate logic circuit, the first dynamic comparison voltage is sampled after a clock cycle delay to obtain the second dynamic comparison voltage, and the corresponding PWM signal is obtained based on the second dynamic comparison voltage.

[0084] The negative input of the dynamic comparator can be a triangular wave signal.

[0085] In some embodiments, the D flip-flop of the delayed trigger circuit 45 can sample the low level of the second dynamic comparison voltage every half cycle, while the other states are high.

[0086] like Figure 3 As shown, after acquiring the feedback voltage signal, the input of the dynamic comparator can be obtained through the error amplifier. The first oscillation signal and the second oscillation signal are respectively the in-phase frequency divider generated by the first oscillation circuit 43 and the second oscillation circuit 44. The D flip-flop can be set to use the rising edge. The first dynamic comparison voltage can be obtained by delaying the first oscillation signal by 1 / 4 period to obtain the second dynamic comparison voltage. The D flip-flop can sample the low level of the second dynamic comparison voltage every half period, thereby obtaining the PWM signal.

[0087] Because the self-oscillating circuit and error amplifier have almost no leakage current due to their infinite internal resistance, the excitation and feedback amplifier circuit 41 generated by the self-oscillation serves as the input and reference of the dynamic comparator circuit. Compared to the static circuit, it not only has lower dynamic power consumption but also a larger offset voltage. By building a delay trigger circuit using NAND gates and D flip-flops, the output current can be latched without generating power consumption. This module consumes very low quiescent current and can provide a large switching current.

[0088] Moreover, the PWM control module 40, which uses a comparator and digital circuits, consumes approximately μA and has a power consumption of μW. In contrast, the PWM module inside the processor consumes approximately mA and has a power consumption of approximately mW, thus saving power consumption in PDLC driving scenarios and hardware standby power consumption.

[0089] This application also provides an electronic device including the above-described supplementary lighting circuit.

[0090] It should be noted that the implementation method of the above-described supplementary lighting circuit embodiment is also applicable to the embodiment of this electronic device and can achieve the same technical effect, so it will not be described again here.

[0091] The aforementioned electronic devices can be mobile phones, tablets, etc.

[0092] See Figure 4 , Figure 4 This is a flowchart of the supplementary lighting method provided in an embodiment of this application. The supplementary lighting method provided in this application can be applied to the above-described supplementary lighting circuit or an electronic device including the above-described supplementary lighting circuit, such as... Figure 4 As shown, the supplemental lighting method includes the following steps:

[0093] Step 401: Obtain sensor data detected by the photoelectric sensor.

[0094] Step 402: Determine the control parameters of the PDLC layer and the current parameters of the fill light based on the sensor data.

[0095] Step 403: Adjust the transmittance of the PDLC layer based on the control parameters of the PDLC layer.

[0096] Step 404: Adjust the current of the fill light based on the current parameters of the fill light.

[0097] In this embodiment, by determining the control parameters of the PDLC layer and the current parameters of the supplementary light based on sensor data, and adjusting the transmittance of the PDLC layer based on the control parameters of the PDLC layer and adjusting the current of the supplementary light based on the current parameters of the supplementary light, the transmittance of the PDLC layer and the brightness of the supplementary light can be adjusted, effectively improving the light utilization rate of the supplementary light and enabling targeted supplementary lighting at different distances.

[0098] In some embodiments, the brightness environment of the current mobile phone can be detected by a photoelectric sensor, and the processor can process the sensor data detected by the photoelectric sensor to obtain the brightness parameters of the fill light, the transmittance of the PDLC layer, etc.

[0099] In some embodiments, when a user turns on the camera and activates the fill light function, or turns on the flashlight of an electronic device, the brightness parameters of the fill light and the transmittance of the PDLC layer can be determined based on the sensor data detected by the photoelectric sensor, thereby adjusting the transmittance of the PDLC layer and the brightness of the fill light.

[0100] For example, when the ambient light is dim, the current of the fill light can be increased; when the ambient light is bright, the current of the fill light can be decreased.

[0101] In some embodiments, determining the control parameters of the PDLC layer and the current parameters of the supplementary light based on the sensor data includes:

[0102] When the subject is a human portrait, the focal length information of the electronic device is obtained;

[0103] The control parameters of the PDLC layer and the current parameters of the fill light are determined based on the focal length information and the sensor data.

[0104] In this embodiment, the focal length information of the electronic device can be determined based on the subject being photographed, and the control parameters of the PDLC layer and the current parameters of the fill light can be determined based on the focal length information and sensor data, so as to further improve the light utilization rate of the fill light.

[0105] In some embodiments, different PDLC levels can be automatically adjusted according to the camera's focal length, thereby automatically sending the corresponding PDLC control level and the current of the LED light, so that the illumination angle and intensity of the fill light can be adaptively matched to the settings for the best fill light effect or flashlight illumination effect.

[0106] like Figure 5a and Figure 5b As shown, when shooting a full-body narrative portrait (35mm focal length), only the portrait area needs to be illuminated, without needing to illuminate a large area. In this case, if the light is scattered uncontrollably, the light utilization rate will be very low. You can apply voltage V1 to the PDLC, turn on the PDLC to its lowest setting, and adjust the FOV to allow the light to illuminate the portrait area, thereby improving the light utilization rate.

[0107] In this scenario, the focal length needs to be manually selected. At this time, there will be an active input signal in the sensor hub. Combined with the brightness information fed back by the ambient light sensor, the fused signal is input as the feedback voltage signal of the PWM control module, which ultimately affects the PWM signal to control the FOV of the PDLC. Similarly, the fill light driver will also adjust the current of the fill light according to the brightness information.

[0108] like Figure 5c As shown, when the subject is a classic half-body portrait (50mm focal length), you can apply V2 voltage to PDCL and turn on PDLC second setting to further reduce FOV.

[0109] like Figure 5d As shown, when the subject is a portrait (85mm focal length), V3 voltage can be applied to the PDLC and the PDLC third setting can be turned on to further reduce the FOV.

[0110] like Figure 5e As shown, when the subject is a close-up portrait (100mm focal length), V4 voltage can be applied to the PDLC and the PDLC fourth setting can be turned on to further reduce the FOV.

[0111] like Figure 5f As shown, when the flashlight is turned on, different PDLC levels can be adjusted according to the size of the fill light area of ​​the object to be illuminated, thereby improving light utilization. When the applied voltage is high enough, the light can be nearly collimated, at which point the FOV is minimized and the illumination distance is maximized.

[0112] The supplementary lighting method of this application embodiment acquires sensor data detected by a photoelectric sensor; determines the control parameters of the PDLC layer and the current parameters of the supplementary light based on the sensor data; adjusts the transmittance of the PDLC layer based on the control parameters of the PDLC layer; and adjusts the current of the supplementary light based on the current parameters of the supplementary light. This can improve the light utilization rate of the supplementary light and achieve targeted supplementary lighting at different distances.

[0113] The supplementary lighting method provided in this application can be executed by a supplementary lighting device. This application uses a supplementary lighting device to execute the supplementary lighting method as an example to illustrate the supplementary lighting device provided in this application.

[0114] See Figure 6 , Figure 6 This is a structural diagram of the supplementary lighting device provided in the embodiments of this application, as shown below. Figure 6 As shown, the supplementary lighting device 600 includes:

[0115] The acquisition module 601 is used to acquire sensor data detected by the photoelectric sensor;

[0116] The determining module 602 is used to determine the control parameters of the PDLC layer and the current parameters of the supplementary light based on the sensor data;

[0117] The first adjustment module 603 is used to adjust the transmittance of the PDLC layer based on the control parameters of the PDLC layer.

[0118] The second adjustment module 604 is used to adjust the current of the fill light based on the current parameters of the fill light.

[0119] Optionally, the determining module 602 is specifically used for:

[0120] When the subject is a human portrait, the focal length information of the electronic device is obtained;

[0121] The control parameters of the PDLC layer and the current parameters of the fill light are determined based on the focal length information and the sensor data.

[0122] The supplementary lighting device 600 in this application embodiment can be an electronic device or a component within an electronic device, such as an integrated circuit or a chip. The electronic device can be a terminal or other devices besides a terminal. For example, the electronic device can be a mobile phone, tablet computer, laptop computer, PDA, in-vehicle electronic device, mobile internet device (MID), augmented reality (AR) / virtual reality (VR) device, robot, wearable device, ultra-mobile personal computer (UMPC), netbook, or personal digital assistant (PDA), etc. It can also be network attached storage (NAS), personal computer (PC), television (TV), ATM, or self-service machine, etc. This application embodiment does not specifically limit the specific device.

[0123] The supplementary lighting device 600 in this embodiment can be a device with an operating system. This operating system can be Android, iOS, or other possible operating systems; this embodiment does not specifically limit its use.

[0124] The supplementary lighting device 600 provided in this embodiment can achieve... Figure 4 The various processes implemented in the method implementation examples will not be described again here to avoid repetition.

[0125] See Figure 7 , Figure 7 This is one of the structural diagrams of the electronic device provided in the embodiments of this application. For example... Figure 7 As shown, the electronic device 700 includes a processor 701 and a memory 702. The memory 702 stores a program or instructions that can run on the processor 701. When the program or instructions are executed by the processor 701, they implement the various steps of the above-described supplementary lighting method embodiment and achieve the same technical effect. To avoid repetition, they will not be described again here.

[0126] It should be noted that the electronic device in the embodiments of this application may be a mobile phone, tablet computer, etc.

[0127] See Figure 8 , Figure 8 This is a second structural diagram of the electronic device provided in the embodiments of this application. For example... Figure 8As shown, the electronic device 800 includes, but is not limited to, components such as: radio frequency unit 801, network module 802, audio output unit 803, input unit 804, sensor 805, display unit 806, user input unit 807, interface unit 808, memory 809, and processor 810.

[0128] Those skilled in the art will understand that the electronic device 800 may also include a power supply (such as a battery) for supplying power to various components. The power supply may be logically connected to the processor 810 through a power management system, thereby enabling functions such as managing charging, discharging, and power consumption through the power management system. Figure 8 The electronic device structure shown does not constitute a limitation on the electronic device. The electronic device may include more or fewer components than shown, or combine certain components, or have different component arrangements, which will not be elaborated here.

[0129] The processor 810 is used for:

[0130] Acquire sensor data detected by the photoelectric sensor;

[0131] The control parameters of the PDLC layer and the current parameters of the supplementary light are determined based on the sensor data.

[0132] The transmittance of the PDLC layer is adjusted based on the control parameters of the PDLC layer;

[0133] The current of the fill light is adjusted based on its current parameters.

[0134] Optionally, the processor 810 is also used for:

[0135] When the subject is a human portrait, the focal length information of the electronic device is obtained;

[0136] The control parameters of the PDLC layer and the current parameters of the fill light are determined based on the focal length information and the sensor data.

[0137] It should be understood that, in this embodiment, the input unit 804 may include a graphics processing unit (GPU) 8041 and a microphone 8042. The GPU 8041 processes image data of still images or videos obtained by an image capture device (such as a camera) in video capture mode or image capture mode. The display unit 806 may include a display panel 8061, which may be configured in the form of a liquid crystal display, an organic light-emitting diode, or the like. The user input unit 807 includes at least one of a touch panel 8071 and other input devices 8072. The touch panel 8071 is also called a touch screen. The touch panel 8071 may include a touch detection device and a touch controller. Other input devices 8072 may include, but are not limited to, physical keyboards, function keys (such as volume control buttons, power buttons, etc.), trackballs, mice, and joysticks, which will not be described in detail here.

[0138] The memory 809 can be used to store software programs and various data. The memory 809 may primarily include a first storage area for storing programs or instructions and a second storage area for storing data. The first storage area may store the operating system, application programs or instructions required for at least one function (such as sound playback, image playback, etc.). Furthermore, the memory 809 may include volatile memory or non-volatile memory, or both. The non-volatile memory may be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory. Volatile memory can be random access memory (RAM), static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDRSDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM), and direct memory bus RAM (DRRAM). The memory 809 in the embodiments of this application includes, but is not limited to, these and any other suitable types of memory.

[0139] Processor 810 may include one or more processing units; optionally, processor 810 integrates an application processor and a modem processor, wherein the application processor mainly handles operations involving the operating system, user interface, and applications, and the modem processor mainly handles wireless communication signals, such as a baseband processor. It is understood that the aforementioned modem processor may also not be integrated into processor 810.

[0140] This application also provides a readable storage medium storing a program or instructions. When the program or instructions are executed by a processor, they implement the various processes of the above-described supplementary lighting method embodiments and achieve the same technical effect. To avoid repetition, they will not be described again here.

[0141] The processor is the processor in the electronic device described in the above embodiments. The readable storage medium includes computer-readable storage media, such as computer read-only memory (ROM), random access memory (RAM), magnetic disk, or optical disk.

[0142] This application embodiment also provides a chip, which includes a processor and a communication interface. The communication interface is coupled to the processor. The processor is used to run programs or instructions to implement the various processes of the above-described supplementary lighting method embodiments and can achieve the same technical effect. To avoid repetition, it will not be described again here.

[0143] It should be understood that the chip mentioned in the embodiments of this application may also be referred to as a system-on-a-chip, system chip, chip system, or system-on-a-chip, etc.

[0144] This application provides a computer program product, including computer instructions. When these computer instructions are executed by a processor, they implement the various processes of the above-described supplementary lighting method embodiments and achieve the same technical effects. To avoid repetition, they will not be described again here.

[0145] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0146] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, can be embodied in the form of a computer product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk), and includes several instructions to cause a terminal (which may be a mobile phone, computer, server, or network device, etc.) to execute the methods described in the various embodiments of this application.

[0147] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A light supplementing circuit, characterized by comprising: The application relates to a light compensation device, which comprises a photoelectric sensor, a light compensation lamp, a pulse width modulation (PWM) level conversion module, a PWM control module, a light compensation lamp driving chip and a polymer dispersed liquid crystal (PDLC) layer, wherein the light emitted by the light compensation lamp is emitted through the PDLC layer. An input end of the light compensation lamp driving chip is electrically connected with the photoelectric sensor, an output end of the light compensation lamp driving chip is electrically connected with the light compensation lamp, and the light compensation lamp driving chip is used for adjusting the current size of the light compensation lamp based on sensor data detected by the photoelectric sensor. The PWM control module is used for generating a PWM signal based on a reference voltage signal and a feedback voltage signal, and the feedback voltage signal is generated based on sensor data detected by the photoelectric sensor. The PWM level conversion module is further used for performing level conversion processing on the PWM signal, and the PWM signal after the level conversion processing is used for controlling the PDLC layer to adjust the transmittance of the PDLC layer. The PWM control module comprises a feedback amplification circuit, a dynamic comparison circuit, a first oscillation circuit, a second oscillation circuit and a delay trigger circuit. An input end of the feedback amplification circuit is connected with the reference voltage signal and the feedback voltage signal respectively, an output end of the feedback amplification circuit is electrically connected with an input end of the dynamic comparison circuit, and the feedback amplification circuit is used for performing amplification processing on the reference voltage signal and the feedback voltage signal and outputting amplification results corresponding to the reference voltage signal and the feedback voltage signal. The dynamic comparison circuit is further electrically connected with the first oscillation circuit and outputs a first dynamic comparison voltage corresponding to the amplification results under the action of a first oscillation signal output by the first oscillation circuit. The delay trigger circuit is used for outputting a PWM signal based on the first dynamic comparison voltage, the first oscillation signal and a second oscillation signal output by the second oscillation circuit. The feedback amplification circuit comprises an error amplifier, and the dynamic comparison circuit comprises a dynamic comparator.

2. The light supplementing circuit of claim 1, wherein, A first input end of the error amplifier is connected with the reference voltage signal, a second input end of the error amplifier is connected with the feedback voltage signal, an output end of the error amplifier is electrically connected with a first input end of the dynamic comparator, and the error amplifier is used for performing amplification processing on the reference voltage signal and the feedback voltage signal and outputting amplification results corresponding to the reference voltage signal and the feedback voltage signal. A second input end of the dynamic comparator is connected with a reference signal, the dynamic comparator is further electrically connected with the first oscillation circuit, and under the action of a first oscillation signal output by the first oscillation circuit, the dynamic comparator outputs a first dynamic comparison voltage corresponding to the amplification results. ​ 3. The light supplementing circuit of claim 2, wherein, The light supplementing circuit further comprises a boost circuit, an input end of the boost circuit being electrically connected with the photoelectric sensor, and an output end of the boost circuit being electrically connected with the PWM level conversion module, the boost circuit generates an ambient light coefficient voltage based on sensor data detected by the photoelectric sensor, and the PWM level conversion module generates the feedback voltage signal based on the ambient light coefficient voltage.

4. The light supplementing circuit of claim 3, wherein, The light supplementing circuit further comprises a processor, an input end of the processor being electrically connected with the photoelectric sensor, and an output end of the processor being electrically connected with an input end of the boost circuit and an input end of the light supplementing lamp driving chip respectively.

5. An electronic device, comprising: The light supplementing circuit comprises the light supplementing circuit according to any one of claims 1 to 4.

6. A light supplementing method, characterized by, The method is applied to the light supplementing circuit according to any one of claims 1 to 4, or the electronic device according to claim 5, and the method comprises: obtaining sensor data detected by a photoelectric sensor; determining a control parameter of the PDLC layer and a current parameter of the light supplementing lamp based on the sensor data; adjusting the transmittance of the PDLC layer based on the control parameter of the PDLC layer; adjusting the current size of the light supplementing lamp based on the current parameter of the light supplementing lamp.

7. The method of claim 6, wherein, The determining of the control parameter of the PDLC layer and the current parameter of the light supplementing lamp based on the sensor data comprises: in a case where the shooting object is a portrait, obtaining focal length information of the electronic device; determining the control parameter of the PDLC layer and the current parameter of the light supplementing lamp based on the focal length information and the sensor data.

8. A light supplementing device, characterized in that The device is applied to the light supplementing circuit according to any one of claims 1 to 4, or the electronic device according to claim 5, and the device comprises: an obtaining module, configured to obtain sensor data detected by a photoelectric sensor; a determining module, configured to determine a control parameter of the PDLC layer and a current parameter of the light supplementing lamp based on the sensor data; a first adjusting module, configured to adjust the transmittance of the PDLC layer based on the control parameter of the PDLC layer; a second adjusting module, configured to adjust the current size of the light supplementing lamp based on the current parameter of the light supplementing lamp.

9. The apparatus of claim 8, wherein, The determining module is specifically configured to: in a case where the shooting object is a portrait, obtain focal length information of the electronic device; determine the control parameter of the PDLC layer and the current parameter of the light supplementing lamp based on the focal length information and the sensor data.

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