Household laser hair removal instrument and control method thereof

Abstract

The invention provides a household laser depilation instrument and a control method thereof, the household laser depilation instrument comprises a depilation instrument main body, a laser module is arranged in the depilation instrument main body, the laser module is provided with at least two laser module areas working independently, each laser module area is provided with a plurality of laser lamps, and the laser lamps are arranged in the laser module areas. The laser lamps on all the laser mode areas are arranged in an array mode. According to the laser depilation instrument, the structure that a laser array works in a partitioned mode and is independently controlled is ingeniously adopted, due to the fact that a laser module works in a partitioned mode and supports the partitioned independent work, the requirement for power output is greatly reduced, the depilation instrument can be driven by a small power source to achieve large-area high-energy density of a treatment surface, and the laser depilation instrument is simple in structure and low in cost. And meanwhile, the power supply is miniaturized, so that the product is portable. Besides, the size of a treatment surface can be flexibly adjusted, small treatment areas such as lips and eyebrows can be irradiated, and the structure is energy-saving, safe, stable and reliable.

Description

Technical Field

[0001] The invention relates to the field of hair removal devices, and in particular to a household laser hair removal device and a control method thereof. Background Art

[0003] Existing home hair removal devices are mainly composed of laser diodes, optical waveguides, heat dissipation units, cooling systems and control systems. Among them. The laser diode is the core component of the hair removal device, which is responsible for emitting light of a specific wavelength. These lights can be absorbed by the melanin in the hair follicles and converted into heat energy, thereby destroying the hair follicle structure and achieving the hair removal effect. The optical waveguide is used to guide the laser beam to ensure that the laser can accurately irradiate the area where hair removal is required. The heat dissipation unit is used to dissipate the heat generated by the laser to prevent the device from overheating and damage. The cooling system includes a semiconductor refrigeration plate, a heat dissipation fan, and a heat transfer device: the semiconductor refrigeration plate is close to the optical waveguide, and its cold surface reduces the temperature of the treatment window to reduce the user's discomfort during the hair removal process. The heat dissipation fan is generally located behind the radiator to help accelerate the dissipation of heat and maintain the stable operation of the device. The heat transfer device connects the hot surface of the semiconductor refrigeration plate and the heat dissipation unit to quickly conduct the heat away. The control system may include a circuit control system and a controller. The circuit control system controls the emission characteristics of the light source, such as the cross-emission time interval of the light beam, the emission light intensity, the emission frequency and the pulse width. The controller is electrically connected to the laser diode, the heat dissipation unit and the cooling system, and is responsible for coordinating the work of each part.

[0004] The mainstream of existing home hair removal devices uses pulsed xenon lamps as light sources. IPL (Intense pulsed light) is an intense pulsed light emitted by a pulsed xenon lamp. A pulsed xenon lamp is a xenon lamp that uses stored electrical energy or chemical energy to produce high-intensity flashes in a very short time. It is an arc discharge type gas discharge lamp. IPL is called intense pulsed light, also known as color light, composite light, and strong light. It is a wide-spectrum visible light with a special wavelength and a softer photothermal effect. It destroys hair follicles through lasers to achieve the effect of permanent hair removal. It has the advantages of fast speed, good effect, high safety, no side effects, painlessness, shrinking pores, and moisturizing the skin.

[0005] In order to achieve better treatment effects and efficiency, existing laser hair removal devices require a large treatment area and very high energy density, which requires the power of the laser module to reach hundreds of watts or even thousands of watts, and the corresponding drive power supply also needs to be very large. Therefore, laser hair removal devices are often used in medical hair removal devices and are relatively large in size.

[0006] In addition, for some special treatment areas, such as lips, eyebrows, etc., the hair removal device needs a relatively small treatment surface. The existing home hair removal device directly shrinks the large light spot into a small light spot by shielding, thereby forming a small treatment surface, which not only wastes energy but also has certain safety risks. Therefore, the existing technology needs to be improved and enhanced. Summary of the invention

[0007] In view of the above-mentioned deficiencies in the prior art, an object of the present invention is to provide a home laser hair removal device and a control method thereof.

[0008] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0009] The present invention provides a household laser hair removal device, comprising a hair removal device body, wherein a laser module is arranged in the hair removal device body, and at least two independently working laser module areas are arranged on the laser module, each laser module area has a plurality of laser lamps, and the laser lamps on all the laser module areas are arranged in an array.

[0010] In a preferred embodiment, in the household laser hair removal device, the maximum power of the laser module is the power of the laser module with the largest power among multiple laser modules, and when the laser module is working, only one laser module is working.

[0011] In a preferred embodiment, in the home laser hair removal device, the powers between the laser mode areas are equal.

[0012] In a preferred embodiment, the home laser hair removal device has the same number of laser lamps in each laser module.

[0013] In a preferred embodiment, the home laser hair removal device is provided with a first module area, a second module area and a third module area on the laser module, the laser lights on the first module area, the second module area and the third module area are arranged in a square array, the first module area, the second module area and the third module area are arranged side by side, and the laser lights on the laser module are arranged in a rectangular array as a whole.

[0014] In a preferred embodiment, in the household laser hair removal device, the light emitting area of ​​the laser module does not exceed 10mm*30mm.

[0015] In a preferred embodiment, the power of the laser mode area of ​​the home laser hair removal device does not exceed 400w.

[0016] In a preferred embodiment, the home laser hair removal device is provided with at least two pairs of positive and negative pins or interfaces on the laser module, and each pair of positive and negative pins or interfaces is electrically connected to the corresponding laser module area.

[0017] In a preferred embodiment, the laser module of the home laser hair removal device is an 808nm VCSEL laser module, or the laser module is a 1064nm VCSEL laser module.

[0018] The present invention also provides a control method for the household laser hair removal device as described above, comprising the following steps:

[0019] S1. In the current cycle, power is supplied to the first module area, the power supply duration is T1, and the total cycle duration is T5;

[0020] S2, when the first module area is powered on, the second module area is powered on for a duration of T2;

[0021] S3, when the power supply to the second module area is finished, power supply to the third module area, and the power supply duration is T3;

[0022] S4, when the power supply to the third module area ends, the power supply to the laser module is stopped, and the power supply suspension lasts for T4;

[0023] S5. The current cycle ends, enters the next working cycle, and returns to step S1.

[0024] Compared with the prior art, the present invention provides a home laser hair removal device and a control method thereof, wherein the home laser hair removal device comprises a hair removal device body, a laser module is arranged in the hair removal device body, and at least two independently working laser module areas are arranged on the laser module, each laser module area has multiple laser lamps, and the laser lamps on all laser module areas are arranged in an array. The present invention is a laser hair removal device, which cleverly adopts a structure in which the laser array works in partitions and is independently controlled. Since the laser module works in partitions and supports working in partitions independently, the requirements for power output are greatly reduced. The hair removal device can be driven by a small power supply to achieve a large area of ​​high energy density on the treatment surface, and its structure is simple. At the same time, the power supply is miniaturized, making the product portable. In addition, in the present invention, the light spot emitted by a single laser module area is a small light spot, which can irradiate small treatment areas such as lips and eyebrows, and the light spots emitted by multiple laser module areas can irradiate a large treatment area to treat general hair removal parts. This structure is not only energy-saving and safe, but also stable and reliable, and can flexibly adjust the size of the treatment surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0026] Figure 1 This is a schematic structural diagram of the laser module of the home laser hair removal device provided by the present invention.

[0027] Figure 2 This is a partially cutaway structural schematic diagram of the household laser hair removal device provided by the present invention.

[0028] Figure 3 This is a schematic diagram of input voltage / cycle of the home laser hair removal device provided by the present invention.

[0029] Figure 4 This is a structural schematic diagram of a control module connected to a laser module of a household laser hair removal device provided by the present invention.

[0030] Description of Figure Numbers:

[0031] Hair removal device main body 100

[0032] Laser module 110

[0033] Laser Mode Area 10

[0034] Laser Light 101

[0035] The first mold area 11

[0036] The second mold area 12

[0037] The third mold area 13

[0038] Pin 20 DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0041] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0042] like Figure 1 , Figure 2 As shown, a home-use laser hair removal device provided by the present invention comprises a hair removal device body 100, wherein a laser module 110 is arranged in the hair removal device body 100, wherein at least two independently working laser module areas 10 are arranged on the laser module 110, wherein each laser module area 10 has a plurality of laser lamps 101, and the laser lamps 101 on all laser module areas 10 are arranged in an array. The present invention is a laser hair removal device, which cleverly adopts a structure in which the laser array works in partitions and is individually controlled. Since the laser module 110 works in partitions and supports working in partitions individually, the requirements for power output are greatly reduced, and the hair removal device can be driven by a small power supply to achieve a large treatment area with high energy density, and its structure is simple, and the power supply is miniaturized, so that the product can be portable. In addition, in the present invention, the light spot emitted by a single laser module 10 is a small light spot, which can irradiate small treatment areas such as lips and eyebrows. The light spots emitted by multiple laser module 10 can irradiate a large treatment area to treat general hair removal areas. This structure is not only energy-saving and safe, but also stable and reliable, and can realize flexible adjustment of the size of the treatment surface.

[0043] The laser mode area of ​​the present invention is at least two laser mode areas, that is, the laser module can be divided into two laser mode areas for independent operation, three mode areas for independent operation, or four mode areas for independent operation. In the case where the laser module includes two laser mode areas, the power of the two laser modules can be one large and one small. If the two laser mode areas are laser mode area No. 1 and laser mode area No. 2, respectively, then the power of laser mode area No. 1 is greater than the power of laser mode area No. 2, or the number of laser lamps in laser mode area No. 1 is greater than the number of laser lamps in laser mode area No. 2, for example, laser mode area No. 1 is a laser lamp array composed of six laser lamps, and laser mode area No. 2 is a laser lamp array composed of four laser lamps, then the light spot of laser mode area No. 1 is relatively large, and the light spot of laser mode area No. 2 is relatively small. For small treatment areas such as lips and eyebrows, Laser Module No. 2 or Laser Module No. 1 can be used alone. For larger treatment areas, Laser Module No. 1 and Laser Module No. 2 are used in turn to form a larger combined treatment area. In this case, the maximum power required by the laser module is the maximum power of Laser Module No. 1.

[0044] In the case where the laser module of the present invention has more than two laser mode areas, for example, the laser module has four laser mode areas, and different position combinations of the four laser mode areas can form a straight-line, L-shaped or T-shaped treatment area. If the two laser mode areas are laser mode area No. 1, laser mode area No. 2, laser mode area No. 3, and laser mode area No. 4, respectively, laser mode area No. 1 can work simultaneously with laser mode area No. 2, and its light spot is a medium light spot. Laser mode area No. 3 can work simultaneously with laser mode area No. 4, and its light spot is also a medium light spot. Laser mode area No. 1 and laser mode area No. 2 can work separately, and their light spots are small light spots. Laser mode area No. 3 and laser mode area No. 4 can work separately, and their light spots are small light spots. Therefore, a light spot or treatment surface of a corresponding size can be used for treatment according to the size of the treatment area required. In this case, the maximum power required by the laser module is the maximum power of the total power of laser mode area No. 1 and laser mode area No. 2 and the total power of laser mode area No. 3 and laser mode area No. 4.

[0045] The smaller the power required by the laser module, the smaller the size of the power supply can be. Preferably, in the household laser hair removal device provided by the present invention, the maximum power of the laser module is the power of the laser module with the largest power among the multiple laser modules, and when the laser module is working, the working laser module is unique. In other words, when the laser module is working, there is only one laser partition working. In this way, not only the overall power of the laser module is greatly reduced, thereby greatly reducing the requirements for the power supply, and thus the size of the power supply can be greatly reduced, but also the heat generated by the working of the laser module is greatly reduced, and the working duration of a single laser module is also greatly reduced, which is not only conducive to reducing the generation of heat, but also provides time for the dissipation of heat, which is conducive to improving the heat dissipation performance of the laser module, thereby reducing the requirements for the cooling system, and is conducive to the simplification of the structure of the cooling system, which is conducive to further reducing the overall size of the hair removal device.

[0046] In order to improve the stability of the hair removal device, preferably, in the home laser hair removal device provided by the present invention, the power between the laser mode areas 10 and the laser mode areas 10 is equal. Preferably, in the home laser hair removal device provided by the present invention, each laser mode area 10 has the same number of laser lamps 101. In other words, the power of each laser mode area 10 is the same, and the treatment surface is also the same, so the power requirements are simpler, the structure and control of the product are also simpler, which is conducive to reducing production costs.

[0047] Preferably, in this embodiment, the home laser hair removal device provided by the present invention, the laser module 110 is provided with a first module area 11, a second module area 12 and a third module area 13, the laser lamps 101 on the first module area 11, the second module area 12 and the third module area 13 are arranged in a square array, the first module area 11, the second module area 12 and the third module area 13 are arranged side by side, and the laser lamps 101 on the laser module 110 are arranged in a rectangular array as a whole.

[0048] The larger treatment area of ​​existing home-use hair removal devices is generally 10mm*30mm. Therefore, specifically, in the home-use laser hair removal device provided by the present invention, the light-emitting area of ​​the laser module 110 does not exceed 10mm*30mm. Preferably, in the home-use laser hair removal device provided by the present invention, the power of the laser module 10 does not exceed 400w. As a home-use hair removal device, the size cannot be too large. Therefore, the power of each laser module 10 should have a certain limit.

[0049] Specifically, the household laser hair removal device provided by the present invention has at least two pairs of positive and negative pins 20 or interfaces on the laser module 110, and each pair of positive and negative pins 20 or interfaces is electrically connected to the corresponding laser module area 10. In this embodiment, there are six pins 20, which are used to connect the positive and negative poles of the power supply to the three laser module areas 10 respectively.

[0050] Preferably, in the household laser hair removal device provided by the present invention, the laser module 110 is an 808nm VCSEL laser module 110, and of course it can also be a 1064nm VCSEL laser module. Vertical-Cavity Surface-Emitting Laser (VCSEL) has excellent characteristics such as good beam quality, dynamic single longitudinal mode operation, low power consumption, and good wavelength stability. In particular, it is easy to integrate high-density two-dimensional arrays and is widely used in optical recognition, optical interconnection systems, optical storage and other fields. In recent years, with the improvement of materials and process technology, VCSEL has played an increasingly important role in the fields of smartphone face recognition, drone obstacle avoidance, VR / AR, sweeping robots, home cameras, etc. With the rapid development and application of 5G communications, VCSEL will become an indispensable main component. However, the introduction of the distributed Bragg reflector in VCSEL makes the thermal effect of the device very serious, especially when VCSEL is integrated into an array device, there is thermal crosstalk between the unit devices, making the thermal effect of the VCSEL array device more serious than that of a single tube device, thereby increasing the threshold of the device and reducing the output power, which has a serious impact on the working life and reliability of the device. The present invention is particularly suitable for using a semiconductor laser module 110, improving the thermal characteristics of the array by optimizing the array unit spacing and arrangement, each laser lamp 101 has a certain spacing, and through the partitioned working method, greatly reducing the generation of heat and improving the heat dissipation performance of the laser module 110.

[0051] like Figure 3 As shown, the present invention also provides a control method for the household laser hair removal device as described above, comprising the following steps:

[0052] S1. In the current cycle, power is supplied to the first module 11, the power supply duration is T1, and the total cycle duration is T5;

[0053] S2, when the first module 11 is powered on, the second module 12 is powered on, and the power supply lasts for T2;

[0054] S3, when the second module 12 is powered on, the third module 13 is powered on, and the power supply duration is T3;

[0055] S4, when the power supply of the third module area 13 ends, the power supply to the laser module 110 is stopped, and the power supply suspension lasts for T4;

[0056] S5. The current cycle ends, enters the next working cycle, and returns to step S1.

[0057] Here, the laser module 110 is divided into three laser mode areas 10 and driven separately. T1, T2, and T3 correspond to the working time of the first mode area 11, the second mode area 12, and the third mode area 13 respectively. The driving power source drives the first mode area 11 to work at T1, the driving power source drives the second mode area 12 to work at T2, and the driving power source drives the third mode area 13 to work at T3. The suspension time is T4, and the total treatment cycle is T5, T5>(T1+T2+T3), T5=T1+T2+T3+T4.

[0058] For example, the driving voltage is 50V, the driving current is 4A, and the total duration of one cycle is 1000ms, that is, T5=1000ms. In one cycle, the driving power supply drives the first mode area 11, the second mode area 12, and the third mode area 13 to work in turn. The first mode area works for 110-150ms, the second mode area works for 120-150ms, and the third mode area works for 130-150ms. In other words, the working time of the first mode area 11 is T1=150ms, the working time of the second mode area 12 is T2=150ms, and the working time of the third mode area 13 is T3=150ms. The power pulse width is 450ms, and the duty cycle can reach 45%. In each cycle, a single laser mode area 10 can rest for 850ms, that is, only 15% of the time in a single cycle is working, and the remaining 85% of the time is stopped, which is beneficial to reduce heat generation, increase heat dissipation time, and improve heat dissipation performance.

[0059] like Figure 4 As shown, the driving power supply can be driven and controlled by connecting the chip to the MOS tube. Metal oxide semiconductor field effect (MOS) transistors can be divided into two categories: N channel and P channel. The P channel silicon MOS field effect transistor has two P+ regions on the N type silicon substrate, which are called source and drain respectively. There is no conduction between the two electrodes. When a sufficient positive voltage is applied to the source (the gate is grounded), the N type silicon surface under the gate presents a P type inversion layer, which becomes a channel connecting the source and the drain. Changing the gate voltage can change the hole density in the channel, thereby changing the resistance of the channel. This MOS field effect transistor is called a P channel enhancement field effect transistor. If there is a P type inversion layer channel on the surface of the N type silicon substrate without adding a gate voltage, adding an appropriate bias voltage can increase or decrease the resistance of the channel. The present invention can drive the laser module through the PWM control of MOS. Here, three MOS modules can be used as switches, and each MOS module is connected to the first module area, the second module area, and the third module area for driving control.

[0060] In addition, in the present invention, assuming that the total power of the laser module 110 is P, for the three laser module areas 10, the power of each laser module area 10 is P / 3, and the power of the power source driving each laser module area 10 is P / 3, while ensuring the product function, the miniaturization of the driving power source can be achieved, and the power source volume can be 1 / 3 of the original. For example, if the total power of the laser module 110 is 600w, and the power of each laser module area 10 is 200w, then the actual maximum power of the laser module 110 is 200w.

[0061] In summary, the present invention is a laser hair removal device that cleverly adopts a structure in which the laser array works in partitions and is independently controlled. Since the laser module works in partitions and supports working in partitions independently, the requirements for power output are greatly reduced. The hair removal device can be driven by a small power supply to achieve a large area of ​​high energy density on the treatment surface, and its structure is simple. At the same time, the power supply is miniaturized, making the product portable. In addition, in the present invention, the light spot emitted by a single laser module is a small light spot, which can irradiate small treatment areas such as lips and eyebrows. The light spots emitted by multiple laser modules can irradiate a large treatment area to treat general hair removal areas. This structure is not only energy-saving and safe, but also stable and reliable, and can flexibly adjust the size of the treatment surface.

[0062] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A home laser hair removal device, comprising a hair removal device body, characterized in that: A laser module is arranged in the main body of the hair removal device. The laser module is provided with at least two independently working laser module areas. Each laser module area has a plurality of laser lamps. The laser lamps on all the laser module areas are arranged in an array.

2. The home laser hair removal device according to claim 1, characterized in that: The maximum power of the laser module is the power of the laser mode area with the largest power among the multiple laser mode areas. When the laser module is working, only one laser mode area is working.

3. The home laser hair removal device according to claim 2, characterized in that: The powers of the laser mode regions are equal to each other.

4. The home laser hair removal device according to claim 3, characterized in that: Each laser mode area has the same number of laser lamps.

5. The home laser hair removal device according to claim 4, characterized in that: The laser module is provided with a first module area, a second module area and a third module area. The laser lights on the first module area, the second module area and the third module area are arranged in a square array. The first module area, the second module area and the third module area are arranged side by side. The laser lights on the laser module are arranged in a rectangular array as a whole.

6. The home laser hair removal device according to claim 5, characterized in that: The light emitting area of ​​the laser module does not exceed 10mm*30mm.

7. The home laser hair removal device according to claim 6, characterized in that: The power of the laser mode area does not exceed 400w.

8. The home laser hair removal device according to claim 1, characterized in that: The laser module is provided with at least two pairs of positive and negative pins or interfaces, and each pair of positive and negative pins or interfaces is electrically connected to a corresponding laser module area.

9. The home laser hair removal device according to any one of claims 1 to 8, characterized in that: The laser module is an 808nm VCSEL laser module, or the laser module is a 1064nm VCSEL laser module.

10. A control method for a home laser hair removal device as claimed in any one of claims 5 to 9, characterized in that: The steps include: S1. In the current cycle, power is supplied to the first module area for a duration of T1. The total duration of the cycle is T5; S2, when the first module area is powered on, the second module area is powered on for a duration of T2; S3, when the power supply to the second module area is finished, power supply to the third module area, and the power supply duration is T3; S4, when the power supply to the third module area ends, the power supply to the laser module is stopped, and the power supply suspension lasts for T4; S5. The current cycle ends, enters the next working cycle, and returns to step S1.

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