Skin care device and control circuit thereof

Abstract

The present application relates to the field of skin care devices and provides a skin care device and a control circuit thereof. The control circuit of the skin care device comprises: a light-emitting unit, a contact identification unit, a skin tone detection unit, and a control unit. In the present application, when an illuminating part is partially or completely in contact with the skin area, the contact identification unit is used to generate a contact electrical signal used for determining that the illuminating part is in contact with the skin, and the skin tone detection unit may be used to detect skin tone information about the skin.

Description

Skin care device and control circuit thereof

[0001] This application claims priority to the Chinese patent application No. 202422321726.7, filed on September 23, 2024, and entitled "Skin care device and control circuit thereof", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present application belongs to the field of skin care devices, and in particular relates to a skin care device and a control circuit thereof. BACKGROUND

[0003] The skin care device can act on the skin by triggering light energy for skin care. For example, triggering pulsed light, near-infrared light, etc. At present, it is necessary to determine whether the light emitting part of the skin care device is in complete contact with the skin before triggering the light energy. That is, only when it is ensured that the light emitting part of the skin care device is in complete contact with the skin, the light energy is allowed to be triggered. SUMMARY

[0004] The purpose of the present application is to provide a skin care device and a control circuit thereof, which can meet the actual use needs of users while avoiding user misjudgment, can also widen the application range of the skin care device, improve the user experience, and increase the user stickiness.

[0005] The first aspect of the embodiment of the present application provides a control circuit of a skin care device, comprising:

[0006] A light emitting unit is configured to output light energy configured for skin care through a light emitting part of the skin care device;

[0007] A contact recognition unit is arranged around the light emitting part, and the contact recognition unit is configured to generate a contact electrical signal configured to determine that the light emitting part is in contact with the skin when the light emitting part is in partial or complete contact with the skin;

[0008] A skin color detection unit is arranged around the light emitting part and is configured to detect skin color information of the skin;

[0009] A control unit is connected with the light emitting unit, the contact recognition unit, and the skin color detection unit, respectively, and the control unit is configured to control the light emitting unit to output the light energy through the light emitting part when the contact electrical signal is received and the preset condition is met according to the skin color information.

[0010] The second aspect of the embodiment of the present application provides a skin care device comprising the control circuit of the skin care device according to the first aspect. BRIEF DESCRIPTION OF DRAWINGS

[0011] Fig. 1 is a structural schematic diagram of a control circuit of a skin care device according to an embodiment of the present application;

[0012] Fig. 2 is a structural schematic diagram of a control circuit of a skin care device according to an embodiment of the present application;

[0013] Fig. 3 is a structural schematic diagram of a contact identification unit in a control circuit of a skin care device according to an embodiment of the present application;

[0014] Fig. 4 is a structural schematic diagram of a control circuit of a skin care device according to an embodiment of the present application;

[0015] Fig. 5 is a structural schematic diagram of a control circuit of a skin care device according to an embodiment of the present application;

[0016] Fig. 6 is a structural schematic diagram of a control circuit of a skin care device according to an embodiment of the present application;

[0017] Fig. 7 is a structural schematic diagram of a skin care device according to an embodiment of the present application. Embodiments of the present application

[0018] In order to make the technical problems to be solved, technical solutions and beneficial effects of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not intended to limit the present application.

[0019] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0020] It should be understood that the terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be understood as limiting the present application.

[0021] In addition, the terms "first", "second", etc. are used only for descriptive purposes and are not to be construed as indicating or implying relative importance or an ordered sequence. Thus, features defined with "first", "second" etc. can include one or more of the features implicitly or explicitly.

[0022] The skin care device can act on the skin by triggering light energy configured for skin care. For example, trigger pulsed light, near infrared light, etc. At present, it is necessary to determine whether the light emitting part of the skin care device is in complete contact with the skin before triggering the light energy. That is, only when it is ensured that the light emitting part of the skin care device is in complete contact with the skin, the light energy is allowed to be triggered.

[0023] However, in actual use, some parts of the human body that need light energy to act on may not be in complete contact with the light emitting part of the skin care device. For example, chin, cheek, underarm, etc. Based on this, it is easy to cause the skin care device to fail to trigger the light energy due to the incomplete contact between the skin and the light emitting part. In this way, not only the actual use demand of the user cannot be met, but also the user is easy to mistakenly think that the skin care device is damaged or malfunctioning.

[0024] To solve the above technical problems, the embodiments of the present application provide a skin care device and a control circuit thereof. The control circuit of the skin care device comprises a light emitting unit, a contact identification unit, a skin color detection unit and a control unit. The light emitting unit is connected with the control unit, and the light emitting unit can output light energy configured for skin care through the light emitting part of the skin care device. The contact identification unit and the skin color detection unit are arranged around the light emitting part, and the contact identification unit and the skin color detection unit are respectively connected with the control unit. The contact identification unit can generate a contact electrical signal configured for determining the contact between the light emitting part and the skin when the light emitting part is partially or completely in contact with the skin. The skin color detection unit can detect the skin color information of the skin. The control unit controls the light emitting unit to output light energy through the light emitting part when the contact electrical signal is received and the preset condition is met according to the skin color information.

[0025] The above scheme, by connecting the control unit with the light emitting unit, the contact identification unit and the skin color detection unit respectively, and using the contact identification unit to generate a contact electrical signal set to determine that the light emitting part is in contact with the skin when the light emitting part is in partial or full contact with the skin, and using the skin color detection unit to detect the skin color information of the skin. Based on this, in the case that the light emitting part is in partial contact with the skin, the skin information is used to determine whether the preset condition is met, and then the light emitting unit is controlled to output light energy. Thus, the skin care needs of different parts of the human body of the user can be met, and the user's misjudgment of the failure or damage of the skin care device can be avoided, the application range of the skin care device can be widened, the user experience can be improved, and the user stickiness can be increased.

[0026] It should be noted that in all embodiments of the present application, the skin care device generally refers to a device that can output light energy to act on the skin. For example, a hair removal instrument, a beauty instrument, etc., which are not limited here.

[0027] It is easy to understand that when the skin care device is a hair removal instrument, the light energy output by the skin care device can be pulsed light. When the skin care device is a beauty instrument, the light energy output by the skin care device can be at least one of pulsed light, near-infrared light and colored light. The following illustrates the skin care device as a beauty instrument outputting near-infrared light.

[0028] Referring to FIG. 1, FIG. 1 shows a structural schematic diagram of a control circuit of a skin care device according to an embodiment of the present application. For ease of illustration, only the parts related to the present embodiment are shown, which are described in detail as follows:

[0029] In FIG. 1, the control circuit 100 of the skin care device includes a light emitting unit 10, a contact identification unit 20, a skin color detection unit 30 and a control unit 40.

[0030] As shown in FIG. 1, the skin care device is configured with a light emitting part 110. The light emitting unit 10 is set to output light energy set for skin care through the light emitting part 110 of the skin care device. The contact identification unit 20 is arranged around the light emitting part 110. The contact identification unit 20 is set to generate a contact electrical signal set to determine that the light emitting part 110 is in contact with the skin when the light emitting part 110 is in partial or full contact with the skin. The skin color detection unit 30 is arranged around the light emitting part 110 and is set to detect the skin color information of the skin. The control unit 40 is connected with the light emitting unit 10, the contact identification unit 20 and the skin color detection unit 30 respectively. The control unit 40 is set to control the light emitting unit 10 to output light energy through the light emitting part 110 when the contact electrical signal is received and the preset condition is determined to be met according to the skin color information.

[0031] In the embodiment, since the contact recognition unit 20 and the skin color detection unit 30 are both arranged around the light emitting part 110, when the light emitting part 110 is in contact with the skin part, the contact recognition unit 20 can generate a contact electric signal under the action of the skin abutting, and the skin color detection unit 30 can detect the skin color information of the skin. Therefore, when the control unit 40 receives the contact electric signal, it can be determined that the light emitting part 110 is in contact with the skin part, and then when it is determined that the preset condition is met according to the skin color information, the control unit 40 controls the light emitting unit 10 to output light energy through the light emitting part 110.

[0032] It is easy to understand that since the contact recognition unit 20 and the skin color detection unit 30 are connected with the control unit 40 respectively, the contact recognition unit 20 transmits the contact electric signal to the control unit 40, and the skin color detection unit 30 transmits the skin color information to the control unit 40, which belong to two isolated paths.

[0033] It should be noted that the contact recognition unit 20 and the skin color detection unit 30 are connected with the control unit 40 respectively, and when the light emitting part 110 is in contact with the skin part, since the contact recognition unit 20 and the skin color detection unit 30 are both arranged around the light emitting part 110, the contact recognition unit 20 generates a contact electric signal, and the skin color detection unit 30 can also detect the skin color information of the skin at the same time. Based on this, the control unit 40 can receive the contact electric signal and the skin color information at the same time.

[0034] For example, the light emitting unit 10 can include a light source controlled by the control unit 40. When the control unit 40 receives the contact electric signal, it can be determined that the light emitting part 110 is in contact with the skin part, and at the same time, it also receives the skin color information sent by the skin color detection unit 30, and then it can control the light source in the light emitting unit 10 to output light energy through the light emitting part 110 when it is determined that the preset condition is met according to the skin color information.

[0035] As an example, the contact recognition unit 20 can include a distance sensor, such as an infrared distance sensor, etc. Based on this, when the light emitting part 110 is in contact with the skin, the distance sensor detects the shortest distance, that is, the distance between the skin and the light emitting part 110 is less than a preset threshold, and then generates a contact electric signal. Here, since the contact recognition unit 20 can generate a contact electric signal when the skin is in partial or complete contact with the light emitting part 110, the distance sensor can be arranged according to the specific shape or edge shape of the light emitting part 110.

[0036] For example, the distance sensor can be arranged around the edge of the light emitting part 110.

[0037] For example, the distance sensor can be arranged along the length direction and / or width direction of the light emitting part 110.

[0038] In other implementations, the distance sensors can also be arranged on the central axis of the light emitting portion 110.

[0039] For example, two distance sensors can be arranged symmetrically with respect to the central axis of the length direction of the light emitting portion 110, or symmetrically with respect to the central axis of the width direction of the light emitting portion 110.

[0040] It can be understood that, in actual use of the skin care device, in order to ensure the skin care effect and ensure that the output light energy has a certain penetration, the light transmission area of the light emitting portion 110 is generally not set too large. For example, the light emitting area of the light emitting portion 110 can be selected between 5cm2to 12cm2, for example, it can be 6cm2.

[0041] Based on this, when the light emitting portion 110 is in contact or fully in contact with the skin portion, the corresponding distance sensor arranged around the light emitting portion 110 can generate a contact electric signal.

[0042] For example, when the light emitting portion 110 is in contact with the skin portion, at least one distance sensor arranged around the edge of the light emitting portion 110 can generate a contact electric signal because the skin contacts the light emitting portion 110.

[0043] For another example, when the light emitting portion 110 is in contact with the skin portion, at least one distance sensor arranged along the length direction and / or the width direction of the light emitting portion 110 can generate a contact electric signal because the skin contacts the light emitting portion.

[0044] Similar to the contact recognition unit 20, the skin color detection unit 30 can be arranged around the light emitting portion 110. When the light emitting portion 110 is in contact or fully in contact with the skin portion, the skin color information detected by the skin color detection unit 30 can be set to represent the skin color of the skin in contact with the light emitting portion 110. In turn, the accuracy of the skin care device triggering light energy can be improved.

[0045] In this embodiment, the skin color information is set to represent the skin color of the skin in contact with the light emitting portion 110. The preset condition can include a skin color threshold. Here, the lighter the skin color, the more likely it is to meet the preset condition, and correspondingly, the darker the skin color, the more likely it is not to meet the preset condition.

[0046] For example, the skin color detection unit 30 can include a photoelectric conversion circuit. When receiving the skin reflected light, the photoelectric conversion circuit generates an electrical signal corresponding to the skin reflected light, i.e., the electrical signal is used to represent the skin color. It is easy to understand that when the skin color is lighter, the skin reflects more light, and the voltage of the electrical signal representing the skin color information is larger. When the skin color is darker, the skin reflects less light, and the voltage of the electrical signal representing the skin color information is smaller. Correspondingly, the preset condition can be a reference voltage set as a skin color threshold. When receiving the contact electrical signal, if the voltage of the electrical signal representing the skin color information is equal to or greater than the reference voltage, the control unit 40 determines that the skin color information satisfies the preset condition. At this time, the control unit 40 controls the light emitting unit 10 to output light energy through the light emitting part 110.

[0047] The above scheme, by connecting the control unit with the light emitting unit, the contact recognition unit and the skin color detection unit respectively, and using the contact recognition unit to generate a contact electrical signal set to determine that the light emitting part is in contact with the skin when the light emitting part is in partial or full contact with the skin, and using the skin color detection unit to detect the skin color information of the skin. Based on this, in the case that the light emitting part is in partial contact with the skin, the skin information is determined to satisfy the preset condition, and the light emitting unit is controlled to output light energy. Thus, while meeting the user's skin care needs for different parts of the human body, it can also avoid the user's misjudgment of the skin care device failure or damage, and can also widen the application range of the skin care device, improve the user experience, and increase the user stickiness.

[0048] FIG. 2 shows a structure schematic diagram of a control circuit of a skin care device according to an embodiment of the present application. As an example, in FIG. 2, the contact recognition unit 20 includes a contact detection electrode 21 and a recognition unit 22.

[0049] As shown in FIG. 2, the contact detection electrode 21 is arranged along the edge of the light emitting part 110. The recognition unit 22 is connected with the contact detection electrode 21.

[0050] In this embodiment, the contact detection electrode 21 is arranged to generate a corresponding electrical signal when the light emitting part 110 is in partial or full contact with the skin. Since the recognition unit 22 is connected with the contact detection electrode 21, the recognition unit 22 can generate a contact electrical signal according to the electrical signal.

[0051] For example, the recognition unit 22 can include a capacitive recognition circuit. Correspondingly, the contact detection electrode 21 is used as a sensing element, and the capacitive recognition circuit can recognize whether the light emitting part 110 is in contact with the skin by detecting the charge change of the sensing element.

[0052] It is easy to understand that, in actual implementation, the light emitting surface of the light emitting part 110 of the skin care device can be any geometric shape, such as a square, a rectangle, a circle, an ellipse, etc., which is not limited here. Correspondingly, the contact detection electrode 21 is arranged along the edge of the light emitting part 110, for example, laid around the peripheral shape of the light emitting surface of the light emitting part 110.

[0053] For example, the contact detection electrode 21 can be used as a sensing piece, that is, regarded as one pole piece of a capacitor. The contact detection electrode 21 can be a sheet-shaped conductor capable of carrying electric charge. The identification unit 22 is connected with the contact detection electrode 21, and can further supply power to the contact detection electrode 21 to make the contact detection electrode 21 carry a certain amount of electric charge.

[0054] For example, the skin can be regarded as another pole piece of the capacitor. During the process that the light emitting part 110 approaches the skin until contact, the amount of electric charge carried by the contact detection electrode 21 continuously changes due to the continuous approach of the skin, so that the identification unit 22 can detect the change of the amount of electric charge carried by the contact detection electrode 21, and further generate a contact electric signal.

[0055] For example, the identification unit 22 can include a sampling branch and an amplification branch. For example, the sampling branch is connected with the contact detection electrode 21 to sample the voltage of the contact detection electrode 21. Then the sampled voltage is amplified by the amplification branch, and a contact electric signal is obtained.

[0056] In the embodiment, by arranging the contact detection electrode along the edge of the light emitting part, the contact detection electrode can generate an electric signal when the light emitting part is in contact with the skin, and the identification unit generates a corresponding contact electric signal to indicate that the light emitting part has contacted with the skin. Thus, the contact between the light emitting part and the skin can be accurately identified.

[0057] FIG. 3 shows a structure diagram of a contact identification unit in a control circuit of a skin care device according to an embodiment of the present application. As an example, in FIG. 3, the contact detection electrode 21 includes at least a first detection electrode 211 and a second detection electrode 212. The first detection electrode 211 and the second detection electrode 212 are arranged along the length direction of the light emitting part 110.

[0058] It should be noted that the first detection electrode 211 and the second detection electrode 212 in the embodiment refer to any two detection electrodes arranged along the length direction of the light emitting part 110. For example, 2 or more detection electrodes can be arranged according to the actual length direction of the light emitting part 110.

[0059] Exemplarily, the first detection electrode 211 and the second detection electrode 212 can be the same metal electrode. Accordingly, in the process that the light emitting part 110 approaches the skin closely until contacting, the amount of charge carried by the first detection electrode 211 and / or the second detection electrode 212 can change in the process that the skin approaches closely. In combination with FIG. 2, when the amount of charge carried by the first detection electrode 211 and the second detection electrode 212 both change continuously due to the skin approaching closely, the identification unit 22 can detect the change of the amount of charge carried by the first detection electrode 211 and the second detection electrode 212 respectively, and further can generate the corresponding contact electric signal.

[0060] As an embodiment, the first detection electrode 211 is arranged along the first edge 111 of the light emitting part 110. The second detection electrode 212 is arranged along the second edge 112 of the light emitting part 110. The first detection electrode 211 is arranged to generate the first electric signal when the first edge 111 contacts the skin. The second detection electrode 212 is arranged to generate the second electric signal when the second edge 112 contacts the skin.

[0061] Exemplarily, the light emitting part 110 is divided into two parts by the dashed line shown in FIG. 3, i.e. the first edge 111 and the second edge 112. Here, the dashed line is only used to distinguish the first edge 111 and the second edge 112 in the length direction of the light emitting part 110, and does not mean that the light emitting part 110 is actually divided into two parts. In actual implementation, the light emitting part 110 can be a whole piece of complete light-transmitting mirror surface.

[0062] In the embodiment, since the amount of charge carried by the first detection electrode 211 and the second detection electrode 212 both change continuously due to the skin approaching closely, the first detection electrode 211 and the second detection electrode 212 can not need to be arranged on the surface of the light emitting part 110. That is, the first detection electrode 211 and the second detection electrode 212 can be isolated from the skin by the shell of the skin care device.

[0063] As a possible implementation manner, the first detection electrode 211 and the second detection electrode 212 can both be a half-enclosed "Fang" shape structure, as shown in FIG. 3. Of course, in other examples, the first detection electrode 211 and the second detection electrode 212 can also be an "L" shape structure and / or a "Y" shape structure, which are not limited here.

[0064] It is easy to understand that in other embodiments, the contact detection electrode can also be arranged according to the specific edge shape of the light emitting part 110.

[0065] For example, if the light-emitting portion 110 is circular, the contact detection electrode 21 may include two or more detection electrodes spaced apart around the circumference of the light-emitting portion 110. These may be two or more arc-shaped detection electrodes spaced apart. As another example, if the light-emitting portion 110 is square, the contact detection electrode 21 may include four detection electrodes, each corresponding to one of the four edges of the light-emitting portion 110. These may be four "I"-shaped detection electrodes.

[0066] In some embodiments, the skin color detection unit 30 may include a first skin color sensor and a second skin color sensor. Similar to the first detection electrode 211 and the second detection electrode 212, the first skin color sensor and the second skin color sensor may also be arranged along the length of the light-emitting portion 110. Alternatively, a skin color sensor may be arranged around each detection electrode.

[0067] In this embodiment, by arranging the first and second detection electrodes at intervals along the length of the light-emitting part, the contact between the light-emitting part and the skin can be detected to the greatest extent possible. Even when the light-emitting part is in contact with the skin, a corresponding contact electrical signal can be generated, refining the granularity of the detection of contact between the light-emitting part and the skin, and providing a foundation for enriching the functions of skin care devices.

[0068] Figure 4 shows a schematic diagram of the control circuit of a skin care device according to an embodiment of this application. In the embodiment shown in Figure 4, the identification unit 22 includes a detection branch 221.

[0069] As shown in Figure 4, the detection branch 221 is connected to the first detection electrode 211 and the second detection electrode 212, respectively. In this embodiment, the detection branch 221 is configured to output a first contact electrical signal when a first electrical signal is acquired, output a second contact electrical signal when a second electrical signal is acquired, and output a third contact electrical signal when both the first and second electrical signals are acquired. The voltages of the first and second contact electrical signals are both less than the voltage of the third contact electrical signal.

[0070] In the embodiment, the detection branch 221 is connected with the first detection electrode 211 and the second detection electrode 212 respectively, and thus the first electric signal sent by the first detection electrode 211 and / or the second electric signal sent by the second detection electrode 212 can be collected. Here, when the first edge 111 contacts the skin, the first detection electrode 211 can generate the first electric signal, so that the detection branch 221 can detect the first electric signal. Similarly, when the second edge 112 contacts the skin, the second detection electrode 212 can generate the second electric signal, so that the detection branch 221 can detect the second electric signal. When both the first edge 111 and the second edge 112 contact the skin, the detection branch 221 can detect the first electric signal and the second electric signal.

[0071] It can be understood that when the detection branch 221 collects the first electric signal or the second electric signal, it can be indicated that the light part 110 partially contacts the skin. When the detection branch 221 collects the first electric signal and the second electric signal, it can be indicated that the light part 110 fully contacts the skin. Based on this, the detection branch 221 can generate a corresponding contact electric signal according to the specific situation of collecting the electric signal.

[0072] For example, the detection branch 221 can include a sampling circuit and a summing circuit including an amplifier. For example, the sampling circuit can include two sampling ends connected with the first detection electrode 211 and the second detection electrode 212 respectively, and thus the first detection electric signal and the second electric signal can be sampled respectively. At the same time, the sampling circuit is connected with the amplification circuit, and the amplification circuit can amplify and output the electric signal sampled by the sampling circuit.

[0073] For example, when the sampling circuit only samples the first electric signal, the summing circuit only amplifies and outputs the first electric signal. When the sampling circuit only samples the second electric signal, the summing circuit only amplifies and outputs the second electric signal. Thus, the amplified first electric signal can be taken as the first contact electric signal, and the amplified second electric signal can be taken as the second contact electric signal. Here, different amplification degrees or different resistance values of the sampling resistor can be set to distinguish the amplified first electric signal and the amplified second electric signal. When the sampling circuit samples the first electric signal and the second electric signal, the summing circuit can perform voltage summation on the first electric signal and the second electric signal, and then output a corresponding voltage as a third contact electric signal.

[0074] As shown in FIG. 4, as an embodiment, the control unit 40 is connected with the detection branch 221. The control unit 40 is further configured to determine that the light part partially contacts the skin when receiving the first contact electric signal or the second contact electric signal, and determine that the light part fully contacts the skin when receiving the third contact electric signal.

[0075] In combination with the above example, the control unit 40 can include a control chip, a first input end of the control chip being connected with the output end of the detection branch 221. It can be that the first input end of the control chip is connected with the output end of the summing circuit. Meanwhile, a second input end of the control chip is arranged to be connected with the skin color detection unit 30, and an output end of the control chip is connected with the controlled end of the light emitting unit 10. Based on this, the control chip can realize control over the light emitting unit 10 according to the contact electric signal and the skin color information.

[0076] In this embodiment, by arranging the first detection electrode and the second detection electrode at intervals along the length direction of the light emitting part, the contact of the light emitting part with the skin part can be detected to the maximum extent. Meanwhile, by sampling the first detection electrode and the second detection electrode respectively by the detection branch, the actual contact of the light emitting part with the skin can be accurately converted into the corresponding contact electric signal and transmitted to the control unit. The control unit can be enabled to control the light emitting unit based on this.

[0077] FIG. 5 shows a structural schematic diagram four of a control circuit of a skin care device according to an embodiment of the present application. The difference between the embodiment of FIG. 5 and the embodiment of FIG. 4 is that, in the embodiment shown in FIG. 5, the identification unit 22 includes a first detection branch 222 and a second detection branch 223.

[0078] In this embodiment, the first detection branch 222 is connected with the first detection electrode 211. The first detection branch 222 is arranged to output a first contact electric signal when the first electric signal is collected. The second detection branch 223 is connected with the second detection electrode 212. The second detection branch is arranged to output a second contact electric signal when the second electric signal is collected. The contact electric signal includes the first contact electric signal and / or the second contact electric signal.

[0079] For example, the sampling branch can include a sampling resistor and an amplifier. The sampling resistor in the two sampling branches can be used to sample the electric signal of the first detection branch 222 and the second detection branch 223 respectively. The sampled electric signal is amplified by the amplifier and then sent to the control unit 40 as the contact electric signal.

[0080] As an embodiment, the control unit 40 is connected with the first detection branch 222 and the second detection branch 223 respectively. The control unit 40 is further arranged to determine that the light emitting part 110 is in contact with the skin part when the first contact electric signal or the second contact electric signal is received, and to determine that the light emitting part 110 is in complete contact with the skin when the first contact electric signal and the second contact electric signal are received.

[0081] In combination with the above example, the control unit 40 can include a control chip, a first input end of the control chip is connected with the output end of the first detection branch 222. A second input end of the control chip is connected with the output end of the second detection branch 223. Meanwhile, a third input end of the control chip is arranged to be connected with the skin color detection unit 30, and an output end of the control chip is connected with the controlled end of the light emitting unit 10. Based on this, the control chip can realize the control of the light emitting unit 10 according to the contact electric signal and the skin color information.

[0082] In the embodiment, by arranging the first detection electrode and the second detection electrode at intervals along the length direction of the light emitting part, the contact of the light emitting part with the skin part can be detected to the maximum extent. Meanwhile, by sampling the first detection electrode and the second detection electrode respectively by using the first detection branch and the second detection branch, the actual contact of the light emitting part with the skin can be accurately converted into the corresponding contact electric signal and transmitted to the control unit. The control unit can be enabled to control the light emitting unit based on this.

[0083] Figure 6 shows a structural schematic diagram of a control circuit of a skin care device according to an embodiment of the present application. The difference between the embodiment shown in Figure 6 and the embodiment shown in Figure 5 is that, in the embodiment shown in Figure 6, as one embodiment, the skin color detection unit 30 includes a first skin color sensor 31 and a second skin color sensor 32. The first skin color sensor 31 is arranged correspondingly to the first detection electrode 211. The first skin color sensor 31 is arranged to obtain the first skin color information of the skin when the first edge 111 is in contact with the skin. The second skin color sensor 32 is arranged correspondingly to the second detection electrode 212, and the second skin color sensor 32 is arranged to obtain the second skin color information of the skin when the second edge 112 is in contact with the skin.

[0084] It should be noted that the first skin color sensor 31 is arranged correspondingly to the first detection electrode 211, and when the first detection electrode 211 generates the first electric signal, it indicates that the skin is attached to / contacted with the first edge 111 of the light emitting part 110 corresponding to the first detection electrode 211. At this time, the first skin color sensor 31 can certainly detect the skin color information of the skin. Similarly, the second skin color sensor 32 is arranged correspondingly to the second detection electrode 212, and when the second detection electrode 212 generates the second electric signal, it indicates that the skin is attached to / contacted with the second edge 112 of the light emitting part 110 corresponding to the second detection electrode 212. At this time, the second skin color sensor 32 can certainly detect the skin color information of the skin. Based on this, in the embodiment, the first skin color information refers to the skin color information obtained by detecting the skin by the first skin color sensor 31. The second skin color information refers to the skin color information obtained by detecting the skin by the second skin color sensor 32.

[0085] For example, the first skin color sensor 31 and the second skin color sensor 32 can be the same skin color sensor. The skin color sensor can generate an electrical signal representing the skin color as skin color information according to the light reflected by the skin, and send the skin color information to the control unit 40.

[0086] In other implementations, the first skin color sensor 31 and the second skin color sensor 32 can also be arranged on the central axis of the light emitting portion 110. Moreover, the first skin color sensor 31 corresponds to the first detection electrode 211, and the second skin color sensor 32 corresponds to the second detection electrode 212.

[0087] For example, referring to FIG. 6, the first skin color sensor 31 and the second skin color sensor 32 are symmetrically arranged on the central axis of the light emitting portion 110 in the length direction, or symmetrically arranged on the central axis of the light emitting portion 110 in the width direction.

[0088] It is easy to understand that when the light emitting portion 110 has a large area, by arranging the first detection electrode 211 and the second detection electrode 212 on the edge of the light emitting portion 110, full-scene detection of the contact between the light emitting portion 110 and the skin can be achieved. That is, whether the light emitting portion 110 is partially or fully in contact with the skin, the first detection electrode 211 and the second detection electrode 212 can trigger the corresponding contact electrical signal. Similarly, by arranging the first skin color sensor 31 corresponding to the first detection electrode 211 and the second skin color sensor 32 corresponding to the second detection electrode 212, the skin color of the skin can be detected when the skin is in contact with the light emitting portion 110. That is, even when the light emitting portion 110 is partially in contact with the skin, the skin color information can be detected by the first skin color sensor 31 and / or the second skin color sensor 32. In this way, the phenomenon of not being able to trigger light energy due to the unreasonable arrangement of the skin color sensor when the light emitting portion 110 has a large area can be avoided.

[0089] As an example, the control unit 40 is connected to the first skin color sensor 31 and the second skin color sensor 32, respectively, as shown in FIG. 6. The control unit 40 is also arranged to control the light emitting unit 10 to output light when the contact electrical signal is received, and the received first skin color information and / or second skin color information satisfies a preset condition.

[0090] In this embodiment, the first skin color information and the second skin color information are both represented by the electrical signal output by the sensor. Here, the preset condition can be a voltage threshold. When the control unit 40 receives the first skin color information and / or the second skin color information, the voltage of the electrical signal corresponding to the first skin color information and / or the second skin color information is compared with the voltage threshold. If the voltage of the electrical signal corresponding to the skin color information is equal to or greater than the voltage threshold, it means that the preset condition is satisfied. If the voltage of the electrical signal corresponding to the skin color information is less than the voltage threshold, it means that the preset condition is not satisfied.

[0091] It is easy to understand that the greater the voltage of the electrical signal output by the skin color sensor, the lighter the skin color, and the smaller the degree of absorption of light energy. Similarly, the smaller the voltage of the electrical signal output by the skin color sensor, the darker the skin color, and the greater the degree of absorption of light energy. If the voltage of the electrical signal output by the skin color sensor is too small, the preset condition is not met, which indicates that the degree of absorption of light energy by the skin is too large, and the light energy is not suitable to be triggered.

[0092] For example, the control unit 40 can include a comparator, which inputs a reference voltage corresponding to the voltage threshold through one input end, inputs the voltage of the electrical signal corresponding to the first skin color information and / or the second skin color information through the other input end, and is connected with the light emitting unit 10 at the output end, so as to compare the voltage of the electrical signal corresponding to the first skin color information and / or the second skin color information with the voltage threshold. The light emitting unit 10 outputs light energy by outputting high and low levels.

[0093] As an embodiment, the control unit 40 is connected with the first skin color sensor 31 and the second skin color sensor 32 respectively. The control unit 40 is further configured to adjust the intensity of the light energy output by the light emitting unit 10 according to the received first skin color information and / or the second skin color information.

[0094] In this embodiment, the control unit 40 can be configured to output different control instructions to the light emitting unit 10 according to different voltages, so as to instruct the light emitting unit 10 to output light energy with different intensities.

[0095] In combination with the above example, in this example, the first skin color information and the second skin color information are also characterized by the voltage of the electrical signal. When the control unit 40 determines that the first skin color information and / or the second skin color information meet the preset condition, the control unit 40 determines the corresponding light energy intensity interval according to the voltage of the electrical signal corresponding to the first skin color information and / or the second skin color information. Thus, the control unit 40 outputs the corresponding control instruction to the light emitting unit 10, instructing the light emitting unit 10 to output light energy with the corresponding intensity.

[0096] For example, when the voltage of the electrical signal corresponding to the first skin color information and / or the second skin color information is large, it indicates that the skin color is light, and the absorption of light energy is weak, so the light energy intensity can be determined to be in a strong interval.

[0097] For another example, when the voltage of the electrical signal corresponding to the first skin color information and / or the second skin color information is small, it indicates that the skin color is dark, and the absorption of light energy is strong, so the light energy intensity can be determined to be in a weak interval.

[0098] In the embodiment, the control unit adjusts the intensity of the light energy output by the light emitting unit according to the received first skin color information and / or second skin color information, so that the light emitting unit adjusts the intensity of the light energy output according to the change of the skin color. That is, the adaptive adjustment of the light energy output by the light emitting unit can be realized.

[0099] FIG. 7 shows a structural schematic diagram of a skin care device according to an embodiment of the present application. As shown in FIG. 7, the skin care device 200 comprises the control circuit 100 of the skin care device according to any of the embodiments of the present application.

[0100] It can be understood that, in the embodiment shown in FIG. 7, due to the improvement points and specific implementation manners related to the present application, the details have been described in the corresponding embodiments of FIGS. 1 to 6, and thus will not be repeated here.

[0101] It can be clearly understood by those skilled in the art that, for the convenience and brevity of description, only the division of the above functional units and modules is taken as an example for illustration, and in actual application, the above functions can be completed by different functional units and modules according to needs, that is, the internal structure of the device is divided into different functional units or modules to complete all or part of the functions described above. Each functional unit or module in the embodiment can be integrated in one processing unit, or each unit can exist physically, or two or more units can be integrated in one unit. The integrated unit can be realized in the form of hardware or in the form of software functional unit.

[0102] The above-described embodiments are only used to illustrate the technical solutions of the present application, rather than limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application.

Claims

1. A control circuit for a skin treatment device, wherein, The application relates to a skin care device, comprising: a light emitting unit arranged to output light energy for skin care through a light emitting part of the skin care device; a contact recognition unit arranged around the light emitting part, the contact recognition unit being arranged to generate a contact electric signal arranged to determine that the light emitting part is in contact with the skin when the light emitting part is in partial or complete contact with the skin; a skin color detection unit arranged around the light emitting part and arranged to detect skin color information of the skin; a control unit connected to the light emitting unit, the contact recognition unit and the skin color detection unit, the control unit being arranged to control the light emitting unit to output light energy through the light emitting part when the contact electric signal is received and the skin color information meets preset conditions.

2. The control circuit of a skin treatment device as claimed in claim 1, wherein, The contact recognition unit comprises: a contact detection electrode arranged along an edge of the light emitting part, the contact detection electrode being arranged to generate a corresponding electric signal when the light emitting part is in partial or complete contact with the skin; a recognition unit connected to the contact detection electrode, the recognition unit being arranged to generate the contact electric signal according to the electric signal.

3. The control circuit of a skin treatment device as claimed in claim 2, wherein, The contact detection electrode comprises at least a first detection electrode and a second detection electrode, the first detection electrode and the second detection electrode being arranged along the length direction of the light emitting part.

4. The control circuit of a skin treatment device as claimed in claim 3, wherein, The first detection electrode is arranged along a first edge of the light emitting part, the first detection electrode being arranged to generate a first electric signal when the first edge is in contact with the skin; The second detection electrode is arranged along a second edge of the light emitting part, the second detection electrode being arranged to generate a second electric signal when the second edge is in contact with the skin.

5. The control circuit of a skin treatment device as claimed in claim 4, wherein, The recognition unit comprises: a detection branch connected to the first detection electrode and the second detection electrode, the detection branch being arranged to output a first contact electric signal when the first electric signal is collected, output a second contact electric signal when the second electric signal is collected, and output a third contact electric signal when the first electric signal and the second electric signal are collected; wherein the voltage of the first contact electric signal and the voltage of the second contact electric signal are both smaller than the voltage of the third contact electric signal.

6. The control circuit of a skin care device as defined in claim 5, wherein, The control unit is connected to the detection branch, and the control unit is further arranged to determine that the light emitting part is in partial contact with the skin when the first contact electric signal or the second contact electric signal is received, and determine that the light emitting part is in complete contact with the skin when the third contact electric signal is received.

7. A control circuit for a skin treatment device as claimed in any of claims 4 to 6, wherein, The recognition unit comprises a first detection branch and a second detection branch; The first detection branch is connected to the first detection electrode, and the first detection branch is arranged to output a first contact electric signal when the first electric signal is collected; The second detection branch is connected to the second detection electrode, and the second detection branch is arranged to output a second contact electric signal when the second electric signal is collected; wherein the contact electric signal comprises the first contact electric signal and / or the second contact electric signal.

8. The control circuit of a skin treatment device as defined in claim 7, wherein, The control unit is connected with the first detection branch and the second detection branch respectively, and the control unit is further configured to determine that the light emitting part is partially in contact with the skin when the first contact electric signal or the second contact electric signal is received, and determine that the light emitting part is completely in contact with the skin when the first contact electric signal and the second contact electric signal are received.

9. A control circuit for a skin treatment device as claimed in any of claims 4 to 8, wherein, The skin color detection unit comprises a first skin color sensor and a second skin color sensor. The first skin color sensor is arranged corresponding to the first detection electrode, and the first skin color sensor is configured to acquire first skin color information of the skin when the first edge is in contact with the skin. The second skin color sensor is arranged corresponding to the second detection electrode, and the second skin color sensor is configured to acquire second skin color information of the skin when the second edge is in contact with the skin.

10. The control circuit for a skin care device as defined in claim 9, wherein, The control unit is connected with the first skin color sensor and the second skin color sensor respectively, and the control unit is further configured to control the light emitting unit to output light when the contact electric signal is received and the received first skin color information and / or the second skin color information meets a preset condition.

11. A control circuit for a skin treatment device as claimed in any of claims 9-10, wherein, The control unit is connected with the first skin color sensor and the second skin color sensor respectively, and the control unit is further configured to adjust the intensity of the light energy output by the light emitting unit according to the received first skin color information and / or the second skin color information.

12. A skin treatment device, wherein, A control circuit of a skin care device as claimed in any one of claims 1 to 11.

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