Skin care equipment and control circuit thereof

Abstract

The utility model relates to the field of skin care equipment, and provides skin care equipment and a control circuit thereof. The control circuit of the skin care equipment comprises a light-emitting unit, a contact recognition unit, a skin color detection unit and a control unit. The control unit is connected with the light emitting unit, the contact recognition unit and the skin color detection unit, the contact recognition unit is used for generating the contact electric signal used for determining that the light emitting part makes contact with the skin when the light emitting part makes contact with the skin partially or completely, and skin color information of the skin can be detected through the skin color detection unit. The light emitting unit can be controlled to output light energy by determining that the preset condition is met according to the skin information under the condition that the light emitting part is in contact with the skin part. While the skin care requirements of the user on different parts of the human body are met, the user can be prevented from misjudging the failure or damage of the skin care equipment, the application range of the skin care equipment can be widened, the use experience of the user is improved, and the viscosity of the user is increased.

Description

Technical Field

[0001] The present application relates to the field of skin care equipment, and in particular to a skin care equipment and a control circuit thereof. Background Art

[0002] Skin care devices can trigger light energy for skin care purposes, such as pulsed light or near-infrared light, to act on the skin. Currently, before triggering the light energy, it is necessary to confirm that the light-emitting portion of the skin care device is in full contact with the skin. In other words, triggering the light energy is only permitted if the light-emitting portion of the skin care device is in full contact with the skin.

[0003] However, in actual use, some areas of the body that require light energy may not fully contact the light-emitting portion of the skin care device. Examples include the chin, cheeks, or underarms. This can easily cause the skin care device to fail to trigger the light energy due to a lack of contact between the skin and the light-emitting portion. This not only fails to meet the user's actual needs, but can also easily lead the user to mistakenly believe the skin care device is damaged or malfunctioning. Utility Model Content

[0004] The purpose of this application is to provide a skin care device and its control circuit, which can meet the actual usage needs of users while avoiding user misjudgment, and can also broaden the scope of application of skin care devices, improve user experience, and increase user stickiness.

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

[0006] a light emitting unit, configured to output light energy for skin care through a light emitting portion of the skin care device;

[0007] a contact recognition unit, disposed around the light emitting portion, for generating a contact electrical signal for determining that the light emitting portion is in contact with the skin when the light emitting portion is in partial or complete contact with the skin;

[0008] The skin color detection unit is arranged around the light emitting portion and is used to detect skin color information;

[0009] The control unit is connected to the light-emitting unit, the contact recognition unit and the skin color detection unit respectively. The control unit is used to control the light-emitting unit to output light energy through the light-emitting part when receiving the contact electrical signal and determining that the preset conditions are met based on the skin color information.

[0010] A second aspect of the embodiments of the present application provides a skin care device, including a control circuit of the skin care device provided by the first aspect.

[0011] Compared to the prior art, the present embodiment of the utility model has the following advantages: the control circuit of the aforementioned skin care device includes: a light-emitting unit, a contact recognition unit, a skin color detection unit, and a control unit. The light-emitting unit is connected to the control unit and can output light energy for skin care through the light-emitting portion of the skin care device. The contact recognition unit and the skin color detection unit are both disposed around the light-emitting portion and are respectively connected to the control unit. The contact recognition unit can generate an electrical contact signal to confirm contact between the light-emitting portion and the skin when the light-emitting portion is partially or fully in contact with the skin. The skin color detection unit can detect skin color information. Upon receiving the electrical contact signal and determining that a preset condition is met based on the skin color information, the control unit controls the light-emitting unit to output light energy through the light-emitting portion. In the above scheme, by connecting the control unit to the light-emitting unit, the contact recognition unit, and the skin color detection unit, respectively, and by using the contact recognition unit to generate an electrical contact signal to confirm contact between the light-emitting portion and the skin when the light-emitting portion is partially or fully in contact with the skin, the skin color detection unit can detect skin color information. Because skin color information can be used to characterize the depth of skin tone in partial or complete contact with the light-emitting portion, and because the depth of skin tone correlates with suitability for light energy used for skin care, the light-emitting unit can be controlled to output light energy based on the skin information, ascertaining that preset conditions have been met when the light-emitting portion is in partial contact with the skin. This not only meets the user's skin care needs for different areas of the body, but also prevents users from misjudging malfunction or damage to the skin care device. This also broadens the applicability of skin care devices, improves the user experience, and increases user stickiness. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 A schematic diagram of the structure of a control circuit of a skin care device provided in an embodiment of the present application;

[0013] Figure 2 A schematic diagram of the specific structure of a control circuit of a skin care device provided in an embodiment of the present application Figure One ;

[0014] Figure 3 A schematic diagram of the specific structure of a contact recognition unit in a control circuit of a skin care device provided in an embodiment of the present application;

[0015] Figure 4 A schematic diagram of the specific structure of a control circuit of a skin care device provided in an embodiment of the present application Figure Two ;

[0016] Figure 5 A schematic diagram of the specific structure of a control circuit of a skin care device provided in an embodiment of the present application Figure Three ;

[0017] Figure 6 A schematic diagram of the specific structure of a control circuit of a skin care device provided in an embodiment of the present application Figure Four ;

[0018] Figure 7 This is a structural schematic diagram of a skin care device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0019] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application more clearly understood, this application is 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 this application and are not intended to limit this application.

[0020] It should be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it may 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 may be directly connected to the other element or indirectly connected to the other element.

[0021] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and 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, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0022] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0023] Skin care devices can trigger light energy for skin care purposes, such as pulsed light or near-infrared light, to act on the skin. Currently, before triggering the light energy, it is necessary to confirm that the light-emitting portion of the skin care device is in full contact with the skin. In other words, triggering the light energy is only permitted if the light-emitting portion of the skin care device is in full contact with the skin.

[0024] However, in actual use, some areas of the body that require light energy may not fully contact the light-emitting portion of the skin care device. Examples include the chin, cheeks, or underarms. This can easily cause the skin care device to fail to trigger the light energy due to a lack of contact between the skin and the light-emitting portion. This not only fails to meet the user's actual needs, but can also easily lead the user to mistakenly believe the skin care device is damaged or malfunctioning.

[0025] In order to solve the above-mentioned technical problems, an embodiment of the present application provides a skin care device and a control circuit thereof. The control circuit of the skin care device includes: a light-emitting unit, a contact recognition unit, a skin color detection unit and a control unit. The light-emitting unit is connected to the control unit, and the light-emitting unit can output light energy for skin care through the light-emitting portion of the skin care device. The contact recognition unit and the skin color detection unit are both arranged around the light-emitting portion, and the contact recognition unit and the skin color detection unit are respectively connected to the control unit. When the light-emitting portion is partially or completely in contact with the skin, the contact recognition unit can generate a contact electrical signal for determining that the light-emitting portion is in contact with the skin. The skin color information of the skin can be detected by the skin color detection unit. When the control unit receives the contact electrical signal and determines that the preset conditions are met based on the skin color information, it controls the light-emitting unit to output light energy through the light-emitting portion.

[0026] The above solution connects the control unit to the light-emitting unit, contact recognition unit, and skin color detection unit, respectively. The contact recognition unit generates an electrical contact signal to confirm contact between the light-emitting unit and the skin when the light-emitting unit is in partial or complete contact with the skin. The skin color detection unit then detects skin color information. Based on this, when the light-emitting unit is in partial contact with the skin, the light-emitting unit can be controlled to output light energy based on the skin information to determine if a preset condition has been met. This not only meets the user's skin care needs for different areas of the body, but also prevents users from misjudging malfunction or damage to the skin care device. This also broadens the applicability of skin care devices, improves the user experience, and increases user stickiness.

[0027] It should be noted that in all embodiments of this application, skin care devices generally refer to devices that can output light energy to act on the skin, such as hair removal devices, beauty devices, etc., which are not limited here.

[0028] It is easy to understand that when the skin care device is specifically a hair removal device, the light energy it outputs can be pulsed light. When the skin care device is specifically a beauty device, the light energy it outputs can be at least one of pulsed light, near-infrared light, and colored light. The following example uses a beauty device that outputs near-infrared light as an example.

[0029] See Figure 1 , Figure 1The following is a schematic diagram showing the structure of a control circuit of a skin care device provided in an embodiment of the present application. For ease of illustration, only the parts relevant to this embodiment are shown, which are described in detail as follows:

[0030] exist Figure 1 In the embodiment, the control circuit 100 of the skin care device includes: a light emitting unit 10 , a contact recognition unit 20 , a skin color detection unit 30 and a control unit 40 .

[0031] like Figure 1 As shown, the skin care device is configured with a light emitting portion 110. The light emitting unit 10 is used to output light energy for skin care through the light emitting portion 110 of the skin care device. The contact recognition unit 20 is arranged around the light emitting portion 110. The contact recognition unit 20 is used to generate a contact electrical signal for determining that the light emitting portion 110 is in contact with the skin when the light emitting portion 110 is partially or completely in contact with the skin. The skin color detection unit 30 is arranged around the light emitting portion 110 and is used to detect skin color information. The control unit 40 is connected to the light emitting unit 10, the contact recognition unit 20 and the skin color detection unit 30 respectively. The control unit 40 is used to control the light emitting unit 10 to output light energy through the light emitting portion 110 when receiving the contact electrical signal and determining that a preset condition is met based on the skin color information.

[0032] In this embodiment, since both the contact recognition unit 20 and the skin color detection unit 30 are disposed around the light emitting portion 110, when the light emitting portion 110 is in partial or complete contact with the skin, the contact recognition unit 20 can generate a corresponding electrical contact signal due to the contact with the skin, and the skin color detection unit 30 can detect the skin color information. Therefore, when the control unit 40 receives the electrical contact signal, it can determine that the light emitting portion 110 is in partial or complete contact with the skin. Furthermore, when it determines based on the skin color information that a preset condition is met, it controls the light emitting unit 10 to output light energy through the light emitting portion 110.

[0033] It is easy to understand that since the contact recognition unit 20 and the skin color detection unit 30 are respectively connected to the control unit 40, the contact recognition unit 20 transmits the contact electrical 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.

[0034] It should be noted that the contact recognition unit 20 and the skin color detection unit 30 are each connected to the control unit 40. When the light-emitting portion 110 is in partial or complete contact with the skin, since both the contact recognition unit 20 and the skin color detection unit 30 are disposed around the light-emitting portion 110, the contact recognition unit 20 generates an electrical contact signal while the skin color detection unit 30 also detects skin color information. Consequently, the control unit 40 can receive both the electrical contact signal and the skin color information simultaneously.

[0035] For example, in a specific implementation, the light-emitting unit 10 may include a light source controlled by the control unit 40. When the control unit 40 receives the electrical contact signal, it can determine whether the light-emitting portion 110 is in partial or complete contact with the skin. Simultaneously, the control unit 40 receives the skin color information sent by the skin color detection unit 30 and, if it determines based on the skin color information that a preset condition is met, controls the light source in the light-emitting unit 10 to output light energy through the light-emitting portion 110.

[0036] As an example, the contact recognition unit 20 may specifically include a distance sensor, such as an infrared distance sensor. Based on this, when the light-emitting portion 110 contacts the skin, the distance detected by the distance sensor is the shortest, meaning that the distance between the skin and the light-emitting portion 110 is less than a preset threshold, thereby generating an electrical contact signal. Here, since the contact recognition unit 20 can generate an electrical contact signal when the skin is in partial or full contact with the light-emitting portion 110, in a specific implementation, the distance sensor can be configured based on the specific shape or edge shape of the light-emitting portion 110.

[0037] For example, distance sensors may be arranged at intervals around the edge of the light exiting portion 110 .

[0038] For another example, distance sensors may be arranged at intervals along the length direction and / or width direction of the light emitting portion 110 .

[0039] In other implementations, the distance sensor may also be disposed on the central axis of the light emitting portion 110 .

[0040] For example, two distance sensors may be provided and symmetrically arranged about the central axis of the light emitting portion 110 in the length direction, or symmetrically arranged about the central axis of the light emitting portion 110 in the width direction.

[0041] It is understandable that, in order to ensure the skin care effect and ensure that the output light energy has a certain degree of penetration when the skin care device is actually used, the light transmission area of ​​the light output portion 110 is generally not set too large. For example, the light output area of ​​the light output portion 110 can be selected to be 5cm 2 Up to 12cm 2 Specifically, it can be 6cm 2 .

[0042] Based on this, when the light emitting portion 110 is partially or completely in contact with the skin, the corresponding distance sensors arranged around the light emitting portion 110 can generate a contact electrical signal.

[0043] For example, when the light emitting portion 110 contacts a portion of the skin, at least one distance sensor surrounding the edge of the light emitting portion 110 may generate a contact electrical signal because the skin contacts the light emitting portion 110 .

[0044] For another example, when the light emitting portion 110 contacts part of the skin, at least one distance sensor arranged along the length direction and / or width direction of the light emitting portion 110 can generate a contact electrical signal because the skin contacts the light emitting portion.

[0045] Similar to the contact recognition unit 20, in a specific implementation, the skin color detection unit 30 can be disposed around the light emitting portion 110. When the light emitting portion 110 is in partial or complete contact with the skin, the skin color information detected by the skin color detection unit 30 can be used to characterize the skin color that the light emitting portion 110 is in contact with. This can thereby improve the accuracy of triggering the light energy of the skin care device.

[0046] In this embodiment, the skin color information is used to characterize the skin color contacting the light emitting portion 110. The preset condition may 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 less likely it is to meet the preset condition.

[0047] In a specific implementation, the skin color detection unit 30 may include a photoelectric conversion circuit. When the photoelectric conversion circuit receives light reflected from the skin, it generates an electrical signal corresponding to the light reflected from the skin, that is, the skin color is represented by the electrical signal. 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. Accordingly, the preset condition can be a reference voltage for representing the skin color threshold, etc. When the control unit 40 receives 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, it determines that the skin color information meets the preset condition. At this time, the control unit 40 controls the light-emitting unit 10 to output light energy through the light-emitting portion 110.

[0048] The above solution connects the control unit to the light-emitting unit, contact recognition unit, and skin color detection unit, respectively. The contact recognition unit generates an electrical contact signal to confirm contact between the light-emitting unit and the skin when the light-emitting unit is in partial or complete contact with the skin. The skin color detection unit then detects skin color information. Based on this, when the light-emitting unit is in partial contact with the skin, the light-emitting unit can be controlled to output light energy based on the skin information to determine if a preset condition has been met. This not only meets the user's skin care needs for different areas of the body, but also prevents users from misjudging malfunction or damage to the skin care device. This also broadens the applicability of skin care devices, improves the user experience, and increases user stickiness.

[0049] Figure 2 The specific structure of the control circuit of a skin care device provided by the embodiment of the present application is shown Figure OneAs an example, in Figure 2 In the embodiment, the contact recognition unit 20 includes a contact detection electrode 21 and a recognition unit 22. Specifically:

[0050] like Figure 2 As shown, the contact detection electrode 21 is disposed along the edge of the light emitting portion 110 . The identification unit 22 is connected to the contact detection electrode 21 .

[0051] In this embodiment, the contact detection electrode 21 is used to generate a corresponding electrical signal when the light emitting portion 110 is partially or completely in contact with the skin. Since the identification unit 22 is connected to the contact detection electrode 21, the identification unit 22 can generate a contact electrical signal based on the electrical signal.

[0052] In a specific implementation, the identification unit 22 may include a capacitance identification circuit. Accordingly, the contact detection electrode 21 serves as a sensor, and the capacitance identification circuit can detect the charge change of the sensor to identify whether the light emitting portion 110 is in contact with the skin.

[0053] It is easy to understand that in actual implementation, the light-emitting surface of the light-emitting portion 110 of the skin care device can be any geometric shape, such as square, rectangular, circular, elliptical, etc., and is not limited here. Accordingly, the contact detection electrode 21 is disposed along the edge of the light-emitting portion 110, specifically, arranged around the outer shape of the light-emitting surface of the light-emitting portion 110.

[0054] For example, the contact detection electrode 21 can function as an inductive element, that is, as a plate of a capacitor. In a specific implementation, the contact detection electrode 21 can be a sheet-shaped conductor capable of carrying an electric charge. The identification unit 22 is connected to the contact detection electrode 21 and can supply power to the contact detection electrode 21, causing it to carry a certain amount of charge.

[0055] As an example, the skin can be regarded as another electrode of a capacitor. In the process of the light-emitting portion 110 approaching the skin until it contacts the skin, the amount of charge carried by the contact detection electrode 21 continues to change as the skin continues to approach, so that the identification unit 22 can detect the change in the amount of charge carried by the contact detection electrode 21, and then generate a contact electrical signal.

[0056] In a specific implementation, the identification unit 22 may include a sampling branch and an amplification branch. For example, the sampling branch is connected to the contact detection electrode 21 to sample the voltage of the contact detection electrode 21. The amplification branch then amplifies the sampled voltage to obtain a contact electrical signal.

[0057] In this embodiment, by placing contact detection electrodes along the edge of the light-emitting portion, when part or all of the light-emitting portion comes into contact with the skin, an electrical signal is generated on the contact detection electrodes, causing the recognition unit to generate a corresponding electrical contact signal to indicate that the light-emitting portion has come into contact with the skin. This allows accurate recognition of contact between the light-emitting portion and the skin.

[0058] Figure 3 The specific structural diagram of the contact recognition unit in the control circuit of a skin care device provided by the embodiment of the present application is shown. As an embodiment, Figure 3 In the embodiment, 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 spaced apart along the length direction of the light emitting portion 110.

[0059] It should be noted that the first detection electrode 211 and the second detection electrode 212 in this embodiment generally refer to any two detection electrodes that can be spaced apart along the length direction of the light emitting portion 110. In specific implementation, two or more detection electrodes can be provided according to the actual length direction of the light emitting portion 110.

[0060] In a specific implementation, the first detection electrode 211 and the second detection electrode 212 can be the same metal electrode. Accordingly, as the light emitting portion 110 approaches the skin until it contacts the skin, the amount of charge carried by the first detection electrode 211 and / or the second detection electrode 212 can change as the skin approaches the skin. Figure 2 When the amount of charge carried by the first detection electrode 211 and the second detection electrode 212 continues to change due to the continuous approach of the skin, the identification unit 22 can detect the changes in the amount of charge carried by the first detection electrode 211 and the second detection electrode 212, and then generate a corresponding contact electrical signal.

[0061] As an embodiment, the first detection electrode 211 is disposed along the first edge 111 of the light exit portion 110. The second detection electrode 212 is disposed along the second edge 112 of the light exit portion 110. The first detection electrode 211 is configured to generate a first electrical signal when the first edge 111 contacts the skin. The second detection electrode 212 is configured to generate a second electrical signal when the second edge 112 contacts the skin.

[0062] For example, Figure 3 The dashed line divides the light-emitting portion 110 into two parts, forming a first edge 111 and a second edge 112. The dashed line is used only to distinguish the first edge 111 and the second edge 112 along the length of the light-emitting portion 110 and does not indicate that the light-emitting portion 110 is actually divided into two parts. In actual implementation, the light-emitting portion 110 can be a single, complete, light-transmitting mirror.

[0063] In the embodiment, since the amount of charge carried by the first detection electrode 211 and the second detection electrode 212 is continuously changed due to the continuous approach of the skin, in the specific implementation, the first detection electrode 211 and the second detection electrode 212 can not 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.

[0064] As shown in Figure 3 , as one possible implementation, the first detection electrode 211 and the second detection electrode 212 can both be a semi-enclosed "Fang" shape structure. Of course, in other examples, the first detection electrode 211 and the second detection electrode 212 can also be "L" shape and / or "Y" shape structure, which is not limited here.

[0065] 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.

[0066] For example, if the light emitting part 110 is circular, the contact detection electrode 21 can include 2 or more detection electrodes arranged at intervals around the circumference of the light emitting part 110. Specifically, it can be 2 or more circular arc detection electrodes arranged at intervals. For example, if the light emitting part 110 is square, the contact detection electrode 21 can include 4 detection electrodes, each detection electrode corresponding to the 4 edges of the light emitting part 110. Specifically, it can be 4 "Y" shape detection electrodes.

[0067] In some embodiments, the skin color detection unit 30 can 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 can also be arranged along the length direction of the light emitting part 110. Alternatively, one skin color sensor can be arranged around each detection electrode.

[0068] 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 between the light emitting part and the skin can be detected to the greatest extent. The corresponding contact electrical signal can be generated in the case of contact between the light emitting part and the skin, which refines the granularity of identifying the contact between the light emitting part and the skin, and provides an implementation basis for enriching the functions of the skin care device.

[0069] Figure 4 Fig. 1 shows a specific structure of a control circuit of a skin care device provided by an embodiment of the present application Figure Two . Figure 4 In the embodiment shown in

[0070] As shown in Figure 4As shown, 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 the first electrical signal is collected, output a second contact electrical signal when the second electrical signal is collected, and output a third contact electrical signal when the first and second electrical signals are collected. The voltages of the first and second contact electrical signals are both lower than the voltage of the third contact electrical signal.

[0071] In this embodiment, the detection branch 221 is connected to the first detection electrode 211 and the second detection electrode 212 respectively, and can thereby collect the first electrical signal sent by the first detection electrode 211 and / or the second electrical signal sent by the second detection electrode 212. Here, when the first edge 111 is in contact with the skin, the first detection electrode 211 is necessarily able to generate a first electrical signal, so that the detection branch 221 can detect the first electrical signal. Similarly, when the second edge 112 is in contact with the skin, the second detection electrode 212 is necessarily able to generate a second electrical signal, so that the detection branch 221 can detect the second electrical signal. When both the first edge 111 and the second edge 112 are in contact with the skin, the detection branch 221 can detect the first electrical signal and the second electrical signal.

[0072] It is understood that when the detection branch 221 collects the first electrical signal or the second electrical signal, it can indicate that the light-emitting portion 110 is partially in contact with the skin. When the detection branch 221 collects the first electrical signal and the second electrical signal, it can indicate that the light-emitting portion 110 is in full contact with the skin. Based on this, the detection branch 221 can generate a corresponding contact electrical signal based on the specific circumstances of the collected electrical signal.

[0073] In a specific implementation, the detection branch 221 may include a sampling circuit and a summing circuit including an amplifier. For example, the sampling circuit may include two sampling terminals, connected to the first detection electrode 211 and the second detection electrode 212, respectively, to sample the first detection electrical signal and the second electrical signal, respectively. The sampling circuit is also connected to an amplifier circuit, which amplifies and outputs the electrical signal sampled by the sampling circuit.

[0074] Exemplarily, when the sampling circuit only samples the first electrical signal, the summing circuit only amplifies the first electrical signal and outputs it. When the sampling circuit only samples the second electrical signal, the summing circuit only amplifies the second electrical signal and outputs it. Thus, the amplified first electrical signal can be used as the first contact electrical signal, and the amplified second electrical signal can be used as the second contact electrical signal. Here, it is also possible to distinguish the amplified first electrical signal from the amplified second electrical signal by setting different amplification levels or setting sampling resistors with different resistance values. When the sampling circuit samples the first electrical signal and the second electrical signal, the summing circuit can sum the voltages of the first electrical signal and the second electrical signal, and then output the corresponding voltage as the third contact electrical signal.

[0075] like Figure 4 As shown, as an embodiment, the control unit 40 is connected to the detection branch 221. The control unit 40 is further configured to determine that the light emitting portion is partially in contact with the skin upon receiving the first contact electrical signal or the second contact electrical signal, and to determine that the light emitting portion is fully in contact with the skin upon receiving the third contact electrical signal.

[0076] In conjunction with the above example, in a specific implementation, the control unit 40 may include a control chip, a first input of which is connected to the output of the detection branch 221. Specifically, the first input of the control chip may be connected to the output of the summing circuit. Simultaneously, the second input of the control chip is connected to the skin color detection unit 30, and the output of the control chip is connected to the controlled end of the light-emitting unit 10. Based on this, the control chip can control the light-emitting unit 10 based on the electrical contact signal and skin color information.

[0077] In this embodiment, by spacing the first and second detection electrodes along the length of the light-emitting portion, the contact between the light-emitting portion and the skin can be detected to the greatest extent possible. Furthermore, by using the detection branch to sample the first and second detection electrodes, the actual contact between the light-emitting portion and the skin can be accurately converted into a corresponding electrical contact signal, which is then transmitted to the control unit. This electrical contact signal then serves as a basis for the control unit to control the light-emitting unit.

[0078] Figure 5 The specific structure of the control circuit of a skin care device provided by the embodiment of the present application is shown Figure Three .and Figure 4 The difference between the embodiments is that Figure 5 In the illustrated embodiment, the identification unit 22 includes a first detection branch 222 and a second detection branch 223 .

[0079] In this embodiment, the first detection branch 222 is connected to the first detection electrode 211. The first detection branch 222 is configured to output a first contact electrical signal when a first electrical signal is collected. The second detection branch 223 is connected to the second detection electrode 212. The second detection branch is configured to output a second contact electrical signal when a second electrical signal is collected. The contact electrical signal includes the first contact electrical signal and / or the second contact electrical signal.

[0080] In a specific implementation, the first detection branch 222 and the second detection branch 223 can be two sampling branches with identical structures. For example, the sampling branches can include sampling resistors and amplifiers. The sampling resistors in the two sampling branches can be used to sample electrical signals from the first detection branch 222 and the second detection branch 223, respectively. The amplifier amplifies the sampled electrical signals and transmits them to the control unit 40 as contact electrical signals.

[0081] As an embodiment, the control unit 40 is connected to the first detection branch 222 and the second detection branch 223. The control unit 40 is further configured to determine that the light emitting portion 110 is partially in contact with the skin upon receiving the first contact electrical signal or the second contact electrical signal, and to determine that the light emitting portion 110 is fully in contact with the skin upon receiving both the first contact electrical signal and the second contact electrical signal.

[0082] In conjunction with the above example, in a specific implementation, the control unit 40 may include a control chip, a first input terminal of which is connected to the output terminal of the first detection branch 222. A second input terminal of the control chip is connected to the output terminal of the second detection branch 223. Furthermore, a third input terminal of the control chip is connected to the skin color detection unit 30, and an output terminal of the control chip is connected to the controlled terminal of the light-emitting unit 10. Based on this, the control chip can control the light-emitting unit 10 based on the contact electrical signal and skin color information.

[0083] In this embodiment, by spacing the first and second detection electrodes along the length of the light-emitting portion, it is possible to maximize detection of contact between the light-emitting portion and the skin. Furthermore, by utilizing the first and second detection branches to sample the first and second detection electrodes, respectively, the actual contact between the light-emitting portion and the skin can be accurately converted into a corresponding electrical contact signal, which is then transmitted to the control unit. This electrical contact signal then serves as a basis for the control unit to control the light-emitting unit.

[0084] Figure 6 FIG. 1 shows a schematic diagram of a control circuit of a skin care device provided in an embodiment of the present application. Figure 5 The difference between the embodiments is that Figure 6In the illustrated embodiment, as an example, 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 disposed corresponding to the first detection electrode 211. The first skin color sensor 31 is configured to obtain first skin color information when the first edge 111 contacts the skin. The second skin color sensor 32 is disposed corresponding to the second detection electrode 212. The second skin color sensor 32 is configured to obtain second skin color information when the second edge 112 contacts the skin.

[0085] It should be noted that the first skin color sensor 31 is provided in correspondence with the first detection electrode 211. When the first detection electrode 211 generates a first electrical signal, it indicates that the skin is in contact with the first edge 111 of the light-emitting portion 110 corresponding to the first detection electrode 211. In this case, the first skin color sensor 31 is capable of detecting the skin color information. Similarly, the second skin color sensor 32 is provided in correspondence with the second detection electrode 212. When the second detection electrode 212 generates a second electrical signal, it indicates that the skin is in contact with the second edge 112 of the light-emitting portion 110 corresponding to the second detection electrode 212. In this case, the second skin color sensor 32 is capable of detecting the skin color information. Therefore, in this embodiment, the first skin color information refers to the skin color information detected by the first skin color sensor 31. The second skin color information refers to the skin color information detected by the second skin color sensor 32.

[0086] In a specific implementation, 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 skin color depth as skin color information based on light reflected from the skin, and send the skin color information to the control unit 40.

[0087] In other implementations, the first skin color sensor 31 and the second skin color sensor 32 may also be disposed on the central axis of the light emitting portion 110 . Furthermore, 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 .

[0088] For example, see Figure 6 The first skin color sensor 31 and the second skin color sensor 32 are symmetrically arranged with respect to the central axis of the light emitting portion 110 in the length direction, or symmetrically arranged with respect to the central axis of the light emitting portion 110 in the width direction.

[0089] It's easy to understand that when the light-emitting portion 110 has a large area, by placing the first detection electrode 211 and the second detection electrode 212 at 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, regardless of whether the light-emitting portion 110 is in partial or full contact with the skin, the first detection electrode 211 and the second detection electrode 212 can trigger the corresponding electrical contact signal. Similarly, by placing the first skin color sensor 31 in correspondence with the first detection electrode 211 and the second skin color sensor 32 in correspondence with the second detection electrode 212, skin color detection can be performed even when the skin is in contact with the light-emitting portion 110. In other words, even when the light-emitting portion 110 is in partial contact with the skin, skin color information can still be detected by the first skin color sensor 31 and / or the second skin color sensor 32. This avoids the phenomenon of light energy being unable to be triggered due to the large area of ​​the light-emitting portion 110 or improper placement of the skin color sensors.

[0090] like Figure 6 As shown, as an embodiment, the control unit 40 is connected to the first skin color sensor 31 and the second skin color sensor 32. The control unit 40 is further configured to control the light emitting unit 10 to output light when a contact electrical signal is received and the received first skin color information and / or second skin color information meet a preset condition.

[0091] In this embodiment, both the first and second skin color information are represented by electrical signals output by a sensor. The preset condition may specifically be a voltage threshold. Upon receiving the first and / or second skin color information, the control unit 40 compares the voltage of the electrical signal corresponding to the first and / or second skin color information 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, the preset condition is satisfied. If the voltage of the electrical signal corresponding to the skin color information is less than the voltage threshold, the preset condition is not satisfied.

[0092] It's easy to understand that a higher voltage in the electrical signal output by the skin color sensor indicates a lighter skin tone and lower light absorption. Similarly, a lower voltage indicates a darker skin tone and higher light absorption. If the voltage of the electrical signal output by the skin color sensor is too low and doesn't meet the preset conditions, it indicates that the skin absorbs too much light energy and is unsuitable for triggering light energy.

[0093] For example, in a specific implementation, the control unit 40 may include a comparator, which receives a reference voltage corresponding to a voltage threshold at one input terminal and an electrical signal voltage corresponding to the first skin color information and / or the second skin color information at another input terminal. The comparator's output terminal is connected to the light-emitting unit 10 to compare the electrical signal voltage corresponding to the first skin color information and / or the second skin color information with the voltage threshold. By outputting high and low levels, the light-emitting unit 10 is controlled to output light energy.

[0094] As an embodiment, the control unit 40 is respectively connected to the first skin color sensor 31 and the second skin color sensor 32. 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 second skin color information.

[0095] In this embodiment, the control unit 40 may be configured to output different control instructions to the light emitting unit 10 according to different voltages, thereby instructing the light emitting unit 10 to output light energy of different intensities.

[0096] In conjunction with the above example, in this example, the first and second skin color information are also represented by electrical signal voltages. Upon determining that the first and / or second skin color information meet preset conditions, the control unit 40 can determine the corresponding light energy intensity range based on the electrical signal voltages corresponding to the first and / or second skin color information. Consequently, the control unit 40 can output corresponding control instructions to the light-emitting unit 10, instructing it to output light energy of the corresponding intensity.

[0097] For example, when the electrical signal voltage corresponding to the first skin color information and / or the second skin color information is larger, it indicates that the skin color is lighter and the light absorption energy is weaker, so the light energy intensity can be determined to be in a stronger range.

[0098] For another example, when the electrical signal voltage corresponding to the first skin color information and / or the second skin color information is small, it indicates that the skin color is darker and has a stronger ability to absorb light, so the light energy intensity can be determined to be in a weaker range.

[0099] In this embodiment, the control unit adjusts the intensity of the light energy output by the light-emitting unit based on the received first skin color information and / or second skin color information. This allows the light-emitting unit to adjust the intensity of the light energy output in response to changes in skin color. In other words, adaptive adjustment of the light energy output by the light-emitting unit can be achieved.

[0100] Figure 7 FIG. 1 shows a schematic structural diagram of a skin care device provided in an embodiment of the present application. Figure 7 As shown, the skin care device 200 includes the control circuit 100 of the skin care device provided by any embodiment of the present application.

[0101] It is understandable that inFigure 7 In the embodiment shown, due to the improvements and specific implementation methods related to this application, Figures 1 to 6 The corresponding embodiments are described in detail, so they will not be described again here.

[0102] Those skilled in the art will clearly understand that for the sake of convenience and brevity of description, only the division of the above-mentioned functional units and modules is used as an example for illustration. In actual applications, the above-mentioned functions can be distributed and completed by different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiments can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The above-mentioned integrated units can be implemented in the form of hardware or in the form of software functional units.

[0103] The above-described embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present application, and should all be included in the scope of protection of the present application.

Claims

1. A control circuit for a skin care device, characterized in that: include: a light emitting unit, configured to output light energy for skin care through a light emitting portion of the skin care device; a contact recognition unit, disposed around the light emitting portion, for generating a contact electrical signal for determining that the light emitting portion is in contact with the skin when the light emitting portion is partially or completely in contact with the skin; a skin color detection unit, disposed around the light emitting portion, for detecting skin color information; A control unit is connected to the light-emitting unit, the contact recognition unit and the skin color detection unit respectively. The control unit is used to control the light-emitting unit to output light energy through the light-emitting portion when receiving the contact electrical signal and determining that a preset condition is met based on the skin color information.

2. The control circuit of the skin care device according to claim 1, wherein: The contact recognition unit includes: a contact detection electrode disposed along an edge of the light emitting portion, the contact detection electrode being configured to generate a corresponding electrical signal when the light emitting portion is in partial or complete contact with the skin; An identification unit is connected to the contact detection electrode, and is configured to generate the contact electric signal according to the electric signal.

3. The control circuit of the skin care device according to claim 2, wherein: The contact detection electrode includes at least a first detection electrode and a second detection electrode, and the first detection electrode and the second detection electrode are spaced apart along the length direction of the light emitting portion.

4. The control circuit of the skin care device according to claim 3, wherein: The first detection electrode is disposed along a first edge of the light emitting portion, and the first detection electrode is configured to generate a first electrical signal when the first edge contacts the skin; The second detection electrode is disposed along a second edge of the light exit portion, and the second detection electrode is configured to generate a second electrical signal when the second edge contacts the skin.

5. The control circuit of the skin care device according to claim 4, wherein: The identification unit includes: a detection branch connected to the first detection electrode and the second detection electrode, respectively, the detection branch being configured to output a first contact electrical signal when the first electrical signal is collected, output a second contact electrical signal when the second electrical signal is collected, and output a third contact electrical signal when the first electrical signal and the second electrical signal are collected; Wherein, the voltage of the first contact electrical signal and the voltage of the second contact electrical signal are both lower than the voltage of the third contact electrical signal.

6. The control circuit of the skin care device according to claim 5, wherein: The control unit is connected to the detection branch, and the control unit is also used to determine that the light output part is partially in contact with the skin when receiving the first contact electrical signal or the second contact electrical signal, and to determine that the light output part is fully in contact with the skin when receiving the third contact electrical signal.

7. The control circuit of the skin care device according to claim 4, wherein: The identification unit includes 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 used to output a first contact electrical signal when the first electrical signal is collected; The second detection branch is connected to the second detection electrode, and the second detection branch is used to output a second contact electrical signal when the second electrical signal is collected; The contact electrical signal includes the first contact electrical signal and / or the second contact electrical signal.

8. The control circuit of the skin care device according to claim 7, wherein: The control unit is connected to the first detection branch and the second detection branch respectively, and the control unit is also used to determine that the light output part is partially in contact with the skin when receiving the first contact electrical signal or the second contact electrical signal, and to determine that the light output part is completely in contact with the skin when receiving the first contact electrical signal and the second contact electrical signal.

9. The control circuit of the skin care device according to claim 4, wherein: The skin color detection unit includes: a first skin color sensor and a second skin color sensor; The first skin color sensor is provided corresponding to the first detection electrode, and is used to obtain first skin color information of the skin when the first edge contacts the skin; The second skin color sensor is provided corresponding to the second detection electrode, and is used for acquiring second skin color information of the skin when the second edge contacts the skin.

10. The control circuit of the skin care device according to claim 9, wherein: The control unit is connected to the first skin color sensor and the second skin color sensor respectively, and is further used to control the light-emitting unit to output light when the contact electrical signal is received and the received first skin color information and / or second skin color information meets preset conditions.

11. The control circuit of the skin care device according to claim 9, wherein: The control unit is connected to the first skin color sensor and the second skin color sensor respectively. The control unit is further configured to adjust the intensity of light energy output by the light emitting unit according to the received first skin color information and / or the received second skin color information.

12. A skin care device, characterized in that The method comprises the control circuit according to any one of claims 1 to 11.

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