Light emitting control circuit and beauty instrument

Abstract

The utility model provides a light-emitting control circuit and a beauty instrument, and relates to the technical field of beauty equipment, the light-emitting control circuit is applied to the beauty instrument, and the light-emitting control circuit comprises a light-emitting module used for generating light irradiating the skin; the optical tracking sensor is used for projecting the laser to the skin, collecting laser speckle images of the skin at multiple different moments and performing image processing on the multiple laser speckle images to obtain the relative displacement of the beauty instrument and the skin; the control module is electrically connected to the optical tracking sensor and the light emitting module, and the control module is used for driving the light emitting module according to the relative displacement response. According to the cosmetic instrument, the optical tracking sensor is additionally arranged on the cosmetic instrument, so that the relative displacement between the cosmetic instrument and the skin can be accurately and quickly detected through the optical tracking sensor, and the light emitting module is controlled to continuously emit light or stop emitting light according to the relative displacement; therefore, the risk of skin injury caused by repeated light emission due to the fact that the beauty instrument stays in the same area for a long time can be reduced, and the beauty effect is improved.

Description

Technical Field

[0001] This application relates to the field of beauty equipment technology, and in particular to a light emission control circuit and a beauty instrument. Background Technology

[0002] In related technologies, beauty devices are instruments used for facial and body skin care. They generally act on the skin through physical means (such as electric fields, magnetic fields, light energy, and heat energy) to achieve effects such as hair removal, cleansing, moisturizing, massage, promoting skin metabolism, firming the skin, reducing wrinkles, or other cosmetic benefits. However, when using a beauty device for quick skin treatments, if the user does not move the device promptly, it can cause the device to remain on the same skin area for too long, potentially damaging the skin and ultimately affecting the cosmetic results. Utility Model Content

[0003] This application aims to at least address one of the technical problems existing in the prior art. To this end, this application proposes a light emission control circuit and a beauty device, designed to reduce skin damage during beauty treatments, thereby improving the beauty effect.

[0004] In a first aspect, embodiments of this application provide a light emission control circuit for use in a beauty device, the light emission control circuit comprising:

[0005] The light-emitting module is used to generate light that shines onto the skin;

[0006] An optical tracking sensor is used to project a laser onto the skin and acquire laser speckle images of the skin at multiple different times, and to perform image processing on the multiple laser speckle images to obtain the relative displacement between the beauty device and the skin;

[0007] A control module is electrically connected to the optical tracking sensor and the light-emitting module. The control module is used to drive the light-emitting module in response to the relative displacement.

[0008] According to some embodiments of this application, the optical tracking sensor includes:

[0009] A laser emitter for emitting and projecting a laser beam onto the skin;

[0010] A drive module, wherein the input terminal of the drive module is electrically connected to the control module and the drive terminal is electrically connected to the laser emitter, and the drive module is used to drive the laser emitter to emit laser light in response to the control signal of the control module.

[0011] According to some embodiments of this application, the optical tracking sensor includes:

[0012] The sensor module is used to receive the optical signal corresponding to the laser speckle image and convert the optical signal into an analog electrical signal;

[0013] An analog front-end circuit module is electrically connected to the sensor module. The analog front-end circuit module is used to receive the analog electrical signal and convert the analog electrical signal into a digital electrical signal.

[0014] A digital signal processing circuit module is electrically connected to the analog front-end circuit module. The digital signal processing circuit module is used to receive the digital electrical signal and determine the relative displacement between the beauty device and the skin based on the digital electrical signal.

[0015] An input / output circuit module is electrically connected to the digital signal processing circuit module and the control module, and the input / output circuit module is used to transmit the relative displacement to the control module.

[0016] According to some embodiments of this application, the light emission interval of the light emission module is less than or equal to a preset interval.

[0017] According to some embodiments of this application, the light-emitting module includes a driving switch and a light-emitting device. The control terminal of the driving switch is electrically connected to the control module, the input terminal of the driving switch is electrically connected to the light-emitting device, and the output terminal of the driving switch is connected to ground.

[0018] According to some embodiments of this application, the light-emitting module further includes an operational amplifier module, the input terminal of which is electrically connected to the control module, and the output terminal of which is electrically connected to the control terminal of the driving switch transistor.

[0019] According to some embodiments of this application, the light-emitting module further includes a voltage regulator module, one end of which is electrically connected to the control terminal of the drive switch transistor, and the other end is connected to ground.

[0020] According to some embodiments of this application, the light-emitting module further includes a bidirectional parallel diode module, one end of which is electrically connected to the output terminal of the operational amplifier module, and the other end of which is electrically connected to the control terminal of the driving switch.

[0021] According to some embodiments of this application, the bidirectional parallel diode module includes a first diode, a first resistor, a second diode, and a second resistor. The cathode of the first diode is electrically connected to the output terminal of the operational amplifier module, and the anode is electrically connected to the control terminal of the driving switch through the first resistor. The anode of the second diode is electrically connected to the output terminal of the operational amplifier module, and the cathode is electrically connected to the control terminal of the driving switch through the second resistor.

[0022] Secondly, embodiments of this application provide a beauty device, including the light emission control circuit as described in the first aspect above.

[0023] According to some embodiments of this application, the beauty device further includes a heat dissipation device, and the control module in the light emission control circuit is also electrically connected to the heat dissipation device. The control module is also used to adjust the heat dissipation power of the heat dissipation device in response to the relative displacement.

[0024] According to the technical solution of the embodiments of this application, at least the following beneficial effects are achieved: The embodiments of this application add an optical tracking sensor to the beauty device. Therefore, the relative displacement between the beauty device and the skin can be accurately and quickly detected by the optical tracking sensor, and the light-emitting module can be controlled to continue emitting light or stop emitting light according to the relative displacement. Therefore, the risk of skin damage caused by repeated light emission due to the beauty device staying in the same area for too long can be reduced, thereby improving the beauty effect.

[0025] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0026] The accompanying drawings are used to provide a further understanding of the technical solutions of this application and constitute a part of the specification. They are used together with the embodiments of this application to explain the technical solutions of this application and do not constitute a limitation on the technical solutions of this application.

[0027] Figure 1 This is a schematic diagram of the structure of a light emission control circuit provided in one embodiment of this application;

[0028] Figure 2 This is a schematic diagram of the structure of the optical tracking sensor and control module in the light emission control circuit provided in one embodiment of this application;

[0029] Figure 3 This is a schematic diagram of the structure of the optical tracking sensor in the light emission control circuit provided in one embodiment of this application;

[0030] Figure 4 This is a schematic diagram of the optical transceiver principle of the optical tracking sensor in the light output control circuit provided in one embodiment of this application;

[0031] Figure 5 This is a schematic diagram of the structure of the light-emitting module in the light-emitting control circuit provided in one embodiment of this application. Detailed Implementation

[0032] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0033] In the description of this application, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0034] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0035] In this utility model, unless otherwise explicitly specified and limited, terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0036] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0037] In some cases, beauty devices are used for facial and body skin care. They generally work on the skin through physical means (such as electric fields, magnetic fields, light energy, and heat energy) to achieve effects such as hair removal, cleansing, moisturizing, massage, promoting skin metabolism, firming the skin, reducing wrinkles, or other cosmetic benefits. However, if a user does not move the beauty device promptly during treatment, it may remain on the same skin area for too long, potentially damaging the skin and ultimately affecting the desired results.

[0038] In some cases, beauty devices can achieve cosmetic treatments by irradiating the skin with light. Some of these devices have longer light pulse intervals, so even if the user doesn't move the device in the same area for an extended period, there's no risk of heat buildup causing skin damage. However, because these devices emit light more slowly, it takes longer to achieve the desired cosmetic treatment effect.

[0039] To address this, the light emission speed of the beauty device can be appropriately increased to shorten the treatment time. However, if the user does not move the beauty device in time after the light emission speed is increased, the beauty device may stay on the same skin area for too long, causing the skin to absorb a large amount of light energy in a short period of time, which may pose a risk of burns. Alternatively, under normal circumstances, the beauty device needs to be irradiated for a specific time at a specific wavelength to achieve the desired beauty effect, and prolonged irradiation may result in the failure to achieve the expected beauty effect.

[0040] Additionally, in some cases, beauty devices can physically remove dirt, oil, and makeup residue from the skin's surface using rotating cleaning brush heads or silicone vibrating heads. However, if the user doesn't move the beauty device promptly during use, it can cause the device to remain on the same skin area for too long, potentially damaging the skin's surface due to excessive friction in a short period.

[0041] In some cases, beauty devices can stimulate the growth of collagen and elastin fibers in the skin by releasing a weak electric current, increasing skin elasticity and firmness. They also promote skin metabolism, accelerate the shedding of dead skin cells, and make the skin smoother and more delicate. However, if the user does not move the beauty device promptly during use, it may remain on the same skin area for too long. This can cause excessive electrical stimulation in that area within a short period, leading to abnormal local blood circulation, potentially causing redness, stinging, or even mild edema. Prolonged exposure to such stimulation can cause irreversible damage to deeper skin tissues and affect the skin's normal physiological functions.

[0042] Based on the above, this application proposes a light emission control circuit and a beauty device to reduce skin damage during beauty treatments, thereby improving the beauty effect.

[0043] The various embodiments of the light emission control circuit of this application will be further described below with reference to the accompanying drawings.

[0044] like Figure 1 and Figure 2 As shown, Figure 1 This is a schematic diagram of the structure of a light emission control circuit provided in one embodiment of this application. Figure 2 This is a schematic diagram of the optical tracking sensor and control module in a light emission control circuit provided in one embodiment of this application.

[0045] In one embodiment, the light emission control circuit includes a light emission module 300, an optical tracking sensor 100, and a control module 200, wherein the optical tracking sensor 100 is connected to the light emission module 300 through the control module 200.

[0046] It is understood that the light-emitting module 300 is used to generate light that shines on the skin; the light-emitting module 300 includes a light source and a light guide element. The light source is a key component for generating light energy, and can be a light-emitting diode flash lamp, a strobe lamp, or a semiconductor laser. This application embodiment does not specifically limit the type of light source; the light guide element is used to guide the light emitted by the light source and shine it on the skin.

[0047] For example, when hair removal is performed through the light-emitting module 300, when the light emitted by the light-emitting module 300 acts on the skin, the melanin on the skin selectively absorbs this light energy and converts it into heat energy; as the light energy absorbed by the melanin increases, its temperature rises sharply. This high temperature will destroy the regenerative tissue around the hair follicle, causing thermal burns and necrosis of the hair follicle; once the hair follicle is destroyed, the hair will lose its basis for growth, thereby achieving the effect of hair removal.

[0048] For example, when acne is treated using the light-emitting module 300, the light emitted by the light-emitting module 300 acts on the skin. Because Propionibacterium acnes produces endogenous porphyrins during its normal metabolism, the light can be absorbed by these porphyrins. After absorbing the light, the porphyrins are excited and secrete singlet oxygen. Singlet oxygen can destroy the cell membrane of bacteria, thereby killing Propionibacterium acnes, reducing the production of acne from the root, and inhibiting the secretion of sebum from the sebaceous glands to prevent the recurrence of acne.

[0049] It is understandable that the light emission interval of the light emission module 300 is less than or equal to the preset interval.

[0050] Understandably, since the light emission interval of the light emission module 300 is within the preset interval, it can avoid heat accumulation on the skin and reduce the risk of skin damage.

[0051] It is understood that the preset interval duration mentioned above can be 0.5 seconds, 0.4 seconds, or 0.3 seconds, and can be set according to actual needs. This application embodiment does not limit it.

[0052] It is understood that the interval duration mentioned above can be the interval between two pulses of light, such as the interval between two lasers during laser emission, or the interval between two LEDs during LED light emission. It can be set according to the actual type of light source, and this application embodiment does not specifically limit it.

[0053] Understandably, the optical tracking sensor 100 is used to project a laser onto the skin and acquire laser speckle images of the skin at multiple different times, as well as to perform image processing on the multiple laser speckle images to obtain the relative displacement between the beauty device and the skin.

[0054] It is understood that the optical tracking sensor 100 of this application embodiment can calculate the relative displacement between the beauty device and the skin through optical image algorithms, and has the advantages of high accuracy, small size and high reliability. In addition, the optical tracking sensor 100 of this application embodiment is a non-contact sensor, which has a large tolerance for assembly accuracy. Furthermore, the optical tracking sensor 100 of this application embodiment has no special requirements for the material of the rotating shaft, processing and other aspects.

[0055] like Figure 3 and Figure 4 As shown, Figure 3 This is a schematic diagram of the structure of the optical tracking sensor in the light emission control circuit provided in one embodiment of this application; Figure 4 This is a schematic diagram of the optical transceiver principle of the optical tracking sensor in the light output control circuit provided in one embodiment of this application.

[0056] In one embodiment, the optical tracking sensor 100 includes a light emitting module 110 and a light receiving module 120.

[0057] Understandably, both the light emitting module 110 and the light receiving module 120 are electrically connected to the control module 200. The light emitting module 110 is used to project the laser onto the skin, and the light receiving module 120 is used to acquire multiple consecutive laser speckle images of the skin and obtain the relative displacement between the beauty device and the skin based on the laser speckle images.

[0058] It is understood that the embodiments of this application can obtain multiple continuous laser speckle images of the skin through the light emitting module 110 and the light receiving module 120, thereby obtaining the relative displacement between the beauty device and the skin through the laser speckle images, and then controlling the light emitting module 300 to continue emitting light or stop emitting light through the relative displacement. Therefore, it can reduce the risk of skin damage caused by the beauty device staying in the same area for too long, thereby improving the beauty effect.

[0059] For example, when a user uses a beauty device to perform ultra-fast hair removal on their face and body, the beauty device projects laser light onto the skin through the light emitting module 110 and collects multiple continuous laser speckle images of the skin through the light receiving module 120. The relative displacement between the beauty device and the skin is obtained through the laser speckle images. If the relative displacement is within a preset range, it means that the beauty device is still in the same area, and the light emitting module 300 is controlled to stop emitting light, thereby reducing the risk of skin damage caused by the beauty device staying in the same area for too long and improving the hair removal effect. If the relative displacement is outside the preset range, it means that the beauty device is not in the same area, and the light emitting module 300 is controlled to continue emitting light to perform hair removal on the skin.

[0060] For example, when a user uses a beauty device to perform ultra-fast hair removal on their face and body, the beauty device projects laser light onto the skin through the light emitting module 110 and collects multiple continuous laser speckle images of the skin through the light receiving module 120. The relative displacement between the beauty device and the skin is obtained through the laser speckle images. If the relative displacement is within a preset range, it means that the beauty device is still in the same area. In this case, the light emitting module 300 is controlled to reduce the light emission frequency, thereby reducing the risk of skin damage caused by the beauty device staying in the same area for too long and improving the hair removal effect. If the relative displacement is outside the preset range, it means that the beauty device is not in the same area. In this case, the light emitting module 300 is controlled to maintain the light emission frequency to perform hair removal on the skin.

[0061] Understandably, the interval between light emission (including pulse groups) of existing hair removal devices to achieve hair removal efficacy is greater than 1.5 seconds. In automatic continuous mode, the 1.5-second interval is sufficient for the user to move away from the current treatment area and receive the next light emission treatment in another area. Since the 1.5-second interval is much longer than the skin's thermal relaxation time, it can avoid the situation where insufficient response time prevents the user from moving away from the treatment area in time, resulting in heat accumulation and damage to the skin due to multiple light emission.

[0062] The beauty device of this application, when used for ultra-fast hair removal on the face and body, suffers from rapid light emission due to the light-emitting module's 300 light emission interval being less than or equal to a preset interval. This rapid light emission can easily cause heat accumulation on the skin, increasing the risk of skin damage. This application, however, employs an optical tracking sensor to accurately and quickly detect the relative displacement between the beauty device and the skin. Based on this relative displacement, the sensor controls the light-emitting module to continue or stop emitting light. This reduces the risk of skin damage caused by the device repeatedly emitting light from the same area for too long, thereby improving the beauty effect.

[0063] It is understood that the control module 200 is electrically connected to the optical tracking sensor 100 and the light emission module 300, and the control module 200 is used to drive the light emission module 300 in response to the relative displacement.

[0064] It is understood that the control module 200 mentioned above can be a microcontroller unit (MCU), a single-chip microcomputer, or an ARM processor, and can be configured according to actual needs. This application embodiment does not specifically limit it.

[0065] It is worth noting that the embodiment of this application adds an optical tracking sensor 100 to the beauty device. Therefore, the relative displacement between the beauty device and the skin can be accurately and quickly detected by the optical tracking sensor 100, and the light-emitting module 300 can be controlled to continue emitting light or stop emitting light according to the relative displacement. Therefore, the risk of skin damage caused by the beauty device staying in the same area for too long can be reduced, thereby improving the beauty effect.

[0066] In another embodiment, the light emitting module 110 includes a laser emitter 111 and a driving module 112.

[0067] Understandably, the laser emitter 111 is used to emit laser light and project it onto the skin; the input terminal of the drive module 112 is electrically connected to the control module 200, and the drive terminal is electrically connected to the laser emitter 111. The drive module 112 is used to drive the laser emitter 111 to emit laser light in response to the control signal from the control module 200.

[0068] It is understood that the aforementioned drive module 112 can be a constant current drive module, a constant voltage drive module, or a pulse drive module, and can be set according to actual needs. This application embodiment does not specifically limit it.

[0069] Understandably, the laser emitter 111 can be a vertical cavity surface-emitting laser (VCSEL). A VCSEL is a device that generates laser light by forming a tiny laser resonant cavity perpendicular to the substrate surface in a semiconductor material. Its core structure includes two distributed Bragg reflectors (DBRs) and an active region. The DBR is composed of multiple layers of materials with different refractive indices stacked alternately, providing high reflectivity to form an optical resonant cavity. The active region is typically composed of a quantum well structure, where electrons and holes recombine to generate photons when current is injected. These photons oscillate and accumulate within the resonant cavity, eventually emitting laser light through the top DBR.

[0070] Understandably, VCSELs have a low threshold current, which means that laser emission can be achieved with a lower drive current, thereby reducing power consumption; VCSELs have high electro-optical conversion efficiency, which can convert more electrical energy into light energy, thereby reducing energy loss and heat generation.

[0071] It is understood that the driving module 112 in this embodiment of the application can respond to the control signal of the control module 200 to drive the laser emitter 111 to emit laser light, and project the laser light onto the skin through the laser emitter 111 to collect laser speckle images of the skin at multiple different times. The relative displacement between the beauty device and the skin can be obtained through the laser speckle images. The relative displacement can then be used to control the light-emitting module 300 to continue emitting light or stop emitting light. Therefore, the risk of skin damage caused by the beauty device staying in the same area for too long can be reduced, thereby improving the beauty effect.

[0072] In another embodiment, the optical receiving module 120 includes a sensor module 121, an analog front-end circuit module 122, a digital signal processing circuit module 123, and an input / output circuit module 124.

[0073] Understandably, sensor module 121 is used to receive light signals corresponding to the laser speckle image and convert the light signals into analog electrical signals; analog front-end circuit module 122 is electrically connected to sensor module 121, and is used to receive analog electrical signals and convert them into digital electrical signals; digital signal processing circuit module 123 is electrically connected to analog front-end circuit module 122, and is used to receive digital electrical signals and determine the relative displacement between the beauty device and the skin based on the digital electrical signals; input / output circuit module 124 is electrically connected to digital signal processing circuit module 123 and control module 200, and is used to transmit the relative displacement to control module 200.

[0074] It is understood that in this embodiment, the sensor module 121 receives the light signal corresponding to the laser speckle image and converts the light signal into an analog electrical signal; then, the analog front-end circuit module 122 converts the analog electrical signal into a digital electrical signal; then, the digital signal processing circuit module 123 extracts features from the digital electrical signal, thereby carefully comparing the obtained before and after features to obtain the similarity and difference of the before and after features, and then determining the relative displacement between the beauty device and the skin based on the similarity and difference of the before and after features; finally, the input / output circuit module 124 transmits the relative displacement to the control module 200, so that the control module 200 drives the light-emitting module 300 to continue emitting light or stop emitting light according to the response of the relative displacement. Therefore, it can reduce the risk of skin damage caused by the beauty device staying in the same area for too long, thereby improving the beauty effect.

[0075] like Figure 5 As shown, Figure 5 This is a schematic diagram of the structure of the light-emitting module in the light-emitting control circuit provided in one embodiment of this application.

[0076] In one embodiment, the light-emitting module 300 includes a driving switch Q and a light-emitting device LAMP. The control terminal of the driving switch Q is electrically connected to the control module 200, the input terminal of the driving switch Q is electrically connected to the light-emitting device LAMP, and the output terminal of the driving switch Q is connected to ground.

[0077] It is understandable that since the control terminal of the driving switch Q is electrically connected to the control module 200, the control module 200 can control the driving switch Q to turn on and off based on the relative displacement, thereby controlling the light-emitting device LAMP to continue emitting light or stop emitting light.

[0078] For example, when the control module 200 responds to the relative displacement and drives the light-emitting device LAMP to continue emitting light, the control module 200 keeps the drive switch Q in the on state so that the light-emitting device LAMP continues to emit light; when the control module 200 responds to the relative displacement and drives the light-emitting device LAMP to stop emitting light, the control module 200 keeps the drive switch Q in the off state so that the light-emitting device LAMP stops emitting light.

[0079] It is understood that the aforementioned driving switch Q can be a field-effect transistor (FET), a bipolar transistor (BJT), or other switching transistors capable of controlling on / off states. The switch is turned on when the input level is high and turned off when the input level is low. This application does not specifically limit the structural type of the driving switch Q. For example, when using an NPN bipolar transistor as the switch, the control terminal of the driving switch Q can be the base. When using a junction field-effect transistor (JFET) as the switch, the control terminal of the driving switch Q can be the gate. Switches have characteristics such as long lifespan, safety and reliability, no mechanical wear, fast switching speed, and small size. They can control the on / off state of large currents with very small currents, and have a wide range of applications.

[0080] It is understandable that when the driving switch Q is a field-effect transistor (FET), the gate of the FET is the control terminal, the source of the FET is the input terminal, and the drain of the FET is the output terminal; wherein, the gate of the FET is electrically connected to the control module 200, the source of the FET is electrically connected to the light-emitting device LAMP, and the drain of the FET is connected to ground.

[0081] It is understandable that when the driving switch Q is a transistor, the base of the transistor is the control terminal, the collector of the transistor is the input terminal, and the emitter of the transistor is the output terminal; wherein, the base of the transistor is electrically connected to the control module 200, the collector of the transistor is electrically connected to the light-emitting device LAMP, and the emitter of the transistor is connected to ground.

[0082] In another embodiment, the light-emitting module 300 further includes an operational amplifier module 310.

[0083] It is understandable that the input terminal of the operational amplifier module 310 is electrically connected to the control module 200, and the output terminal of the operational amplifier module 310 is electrically connected to the control terminal that drives the switching transistor Q.

[0084] It is understandable that the operational amplifier module 310 can linearly amplify the voltage signal output by the control module 200 to the control level required to drive the switch Q, so as to control the turn-on and turn-off of the drive switch Q.

[0085] In another embodiment, the light-emitting module 300 further includes a voltage regulator module Z.

[0086] Understandably, one end of the voltage regulator module Z is electrically connected to the control terminal of the drive switch Q, and the other end is connected to ground.

[0087] Understandably, since the voltage regulator module Z has the functions of voltage clamping, dynamic voltage regulation and anti-interference protection, it can ensure that the piezoelectric stability of the control terminal of the drive switch Q is within the safe threshold.

[0088] In another embodiment, the light-emitting module 300 further includes a bidirectional parallel diode module 320.

[0089] It is understandable that one end of the bidirectional parallel diode module 320 is electrically connected to the output terminal of the operational amplifier module 310, and the other end of the bidirectional parallel diode module 320 is electrically connected to the control terminal of the drive switch Q.

[0090] It is understood that the bidirectional parallel diode module 320 includes a first diode D1, a first resistor R1, a second diode D2, and a second resistor R2. The cathode of the first diode D1 is electrically connected to the output terminal of the operational amplifier module 310, and the anode is electrically connected to the control terminal of the driving switch Q through the first resistor R1. The anode of the second diode D2 is electrically connected to the output terminal of the operational amplifier module 310, and the cathode is electrically connected to the control terminal of the driving switch Q through the second resistor R2.

[0091] It is understood that the embodiments of this application, through the bidirectional parallel diode module 320, can significantly improve the safety, stability and signal integrity of the operational amplifier driving switch Q control terminal through a triple mechanism of bidirectional clamping, impedance matching and reverse suppression.

[0092] Based on the light emission control circuits of the above embodiments, various embodiments of the beauty device of this application are presented below.

[0093] In addition, one embodiment of this application provides a beauty device that includes the light emission control circuit of any of the above embodiments.

[0094] According to the technical solution of the beauty device in the embodiment of this application, since the embodiment of this application adds an optical tracking sensor 100 to the beauty device, the relative displacement between the beauty device and the skin can be accurately and quickly detected by the optical tracking sensor 100, and the light-emitting module 300 can be controlled to continue emitting light or stop emitting light according to the relative displacement. Therefore, the risk of skin damage caused by the beauty device staying in the same area for too long can be reduced, thereby improving the beauty effect.

[0095] It is worth noting that since the beauty device of this application embodiment includes the light emission control circuit of any of the above embodiments, the specific implementation method and technical effect of the beauty device of this application embodiment can refer to the specific implementation method and technical effect of the light emission control circuit of any of the above embodiments.

[0096] It is understood that the beauty device in this application can be a hair removal device, a facial cleansing device, a radio frequency beauty device, or a photon skin rejuvenation device. The embodiments of this application do not specifically limit the type of beauty device.

[0097] In another embodiment, the beauty device also includes a heat dissipation device, and the control module 200 in the light emission control circuit is also electrically connected to the heat dissipation device. The control module 200 is also used to adjust the heat dissipation power of the heat dissipation device in response to the relative displacement.

[0098] It is understood that the heat dissipation device can be a fan or a thermoelectric cooler, and the embodiments of this application do not specifically limit it.

[0099] It is understood that the embodiment of this application adds an optical tracking sensor 100 to the beauty device. Therefore, the relative displacement between the beauty device and the skin can be accurately and quickly detected by the optical tracking sensor 100, and the heat dissipation power of the heat dissipation device can be adjusted according to the relative displacement. Therefore, the risk of skin damage caused by the beauty device staying in the same area for too long can be reduced, thereby improving the beauty effect.

[0100] For example, when a user uses a beauty device to remove hair from their face and body, the device emits a laser through a laser emitter 111 and projects it onto the skin. A sensor module 121 collects multiple consecutive laser speckle images of the skin to determine the relative displacement between the device and the skin. If the relative displacement is within a preset range, it indicates that the device is still in the same area. In this case, the heat dissipation power of the cooling device is adjusted to prevent skin damage caused by the device remaining in the same area for too long. For example, if the device's temperature is too high, the user may feel hot and have a poor experience. Furthermore, it can prevent burns from excessive heat, thus improving temperature control. If the relative displacement is outside the preset range, it indicates that the device is not in the same area, and the heat dissipation power of the cooling device does not need to be adjusted.

[0101] Understandably, when the heat dissipation device is a fan, if the beauty device remains in the same area, the fan speed is increased to improve heat dissipation. If the heat dissipation device is a thermoelectric cooler, the heat dissipation is improved by adjusting the operating current of the thermoelectric cooler. For example, if the operating current is less than or equal to the preset optimal current, the operating current of the thermoelectric cooler is increased to improve heat dissipation; if the operating current is greater than the preset optimal current, the operating current of the thermoelectric cooler is decreased.

[0102] It is understood that the aforementioned preset range can be set according to actual needs, and this application embodiment does not specifically limit it.

[0103] The above provides a detailed description of the preferred embodiments of this application. However, this application is not limited to the above-described embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of this application. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. A light emission control circuit, characterized in that, The light emission control circuit, used in beauty devices, includes: The light-emitting module is used to generate light that shines onto the skin; An optical tracking sensor is used to project a laser onto the skin and acquire laser speckle images of the skin at multiple different times, and to perform image processing on the multiple laser speckle images to obtain the relative displacement between the beauty device and the skin; A control module is electrically connected to the optical tracking sensor and the light-emitting module. The control module is used to drive the light-emitting module in response to the relative displacement.

2. The light emission control circuit according to claim 1, characterized in that, The optical tracking sensor includes: A laser emitter for emitting and projecting a laser beam onto the skin; A drive module, wherein the input terminal of the drive module is electrically connected to the control module and the drive terminal is electrically connected to the laser emitter, and the drive module is used to drive the laser emitter to emit laser light in response to the control signal of the control module.

3. The light emission control circuit according to claim 1, characterized in that, The optical tracking sensor includes: The sensor module is used to receive the optical signal corresponding to the laser speckle image and convert the optical signal into an analog electrical signal; An analog front-end circuit module is electrically connected to the sensor module. The analog front-end circuit module is used to receive the analog electrical signal and convert the analog electrical signal into a digital electrical signal. A digital signal processing circuit module is electrically connected to the analog front-end circuit module. The digital signal processing circuit module is used to receive the digital electrical signal and determine the relative displacement between the beauty device and the skin based on the digital electrical signal. An input / output circuit module is electrically connected to the digital signal processing circuit module and the control module, and the input / output circuit module is used to transmit the relative displacement to the control module.

4. The light emission control circuit according to claim 1, characterized in that, The light emission interval of the light-emitting module is less than or equal to the preset interval.

5. The light emission control circuit according to claim 3, characterized in that, The light-emitting module includes a driving switch and a light-emitting device. The control terminal of the driving switch is electrically connected to the control module, the input terminal of the driving switch is electrically connected to the light-emitting device, and the output terminal of the driving switch is connected to ground.

6. The light emission control circuit according to claim 5, characterized in that, The light-emitting module also includes an operational amplifier module, the input terminal of which is electrically connected to the control module, and the output terminal of which is electrically connected to the control terminal of the driving switch.

7. The light emission control circuit according to claim 6, characterized in that, The light-emitting module also includes a voltage regulator module, one end of which is electrically connected to the control terminal of the drive switch transistor, and the other end is connected to ground.

8. The light emission control circuit according to claim 6, characterized in that, The light-emitting module also includes a bidirectional parallel diode module, one end of which is electrically connected to the output terminal of the operational amplifier module, and the other end of which is electrically connected to the control terminal of the driving switch.

9. The light emission control circuit according to claim 8, characterized in that, The bidirectional parallel diode module includes a first diode, a first resistor, a second diode, and a second resistor. The cathode of the first diode is electrically connected to the output terminal of the operational amplifier module, and the anode is electrically connected to the control terminal of the driving switch through the first resistor. The anode of the second diode is electrically connected to the output terminal of the operational amplifier module, and the cathode is electrically connected to the control terminal of the driving switch through the second resistor.

10. A beauty device, characterized in that, Includes the light emission control circuit as described in any one of claims 1 to 9.

11. The beauty device according to claim 10, characterized in that, The beauty device also includes a heat dissipation device, and the control module in the light emission control circuit is also electrically connected to the heat dissipation device. The control module is also used to adjust the heat dissipation power of the heat dissipation device in response to the relative displacement.

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