Method for precise control of wavelength of light therapy instrument and light therapy instrument based on the method

Abstract

The application discloses a precise control method of wavelength of a light therapeutic instrument and a light therapeutic instrument based on the method. t The wavelength pre-compensation algorithm is used to realize pre-compensation of the wavelength of the single-wavelength LED light source, first, the wavelength drift Delta lambda of the central wavelength of the LED light source when the chip temperature t is calculated relative to the standard reference temperature t0 t The central wavelength obtained by subtracting Delta lambda from the target central wavelength is used to select the LED light source of the light therapeutic instrument, and precise control of the wavelength of the light therapeutic instrument is realized. The chip temperature t of the LED light source when working is kept constant through the liquid cooling heat dissipation system. The wavelength pre-compensation algorithm is used to realize pre-compensation of the wavelength of the single-wavelength LED light source, which can effectively solve the problem of wavelength drift caused by heat of the LED light source. The liquid cooling heat dissipation system is set to keep the chip temperature constant, more accurately control the wavelength pre-compensation, ensure that the treatment light spectrum, intensity and energy are precisely controlled, and precise treatment is realized.

Description

Technical Field

[0001] This invention relates to the field of phototherapy technology, and in particular to a method for precise control of the wavelength of a phototherapy device and a phototherapy device based on this method. Background Technology

[0002] Specific wavelengths of light can stimulate and activate specific cells; therefore, treatments based on visible and infrared wavelengths are widely used in medical and cosmetic procedures. Currently, some visible and infrared light therapy devices on the market use thermoluminescence-based light sources. These sources emit visible and infrared light that covers almost the entire spectrum of near-visible, mid-visible, and far-visible and infrared light, but cannot provide high-intensity, precise wavelengths and power spectra, thus failing to achieve specific therapeutic goals. Other devices use single-wavelength LED light sources. While their narrow wavelength range allows for precise center wavelengths and specific spectra, enabling targeted treatment, single-wavelength LEDs generate significant heat, and temperature fluctuations can cause wavelength drift, preventing the desired therapeutic effect from being achieved.

[0003] How to keep the center wavelength and power spectrum of visible light and infrared light therapy devices constant, and ensure that the energy and wavelength of the treatment are consistent with the expected effect, so as to achieve the intended therapeutic effect, is one of the important problems that phototherapy and photocosmetic therapy need to solve.

[0004] Based on this, this application creates a precise control method for the wavelength of a phototherapy device and a phototherapy device based on this method. It enables the device to pre-compensate the wavelength of the LED light source in the phototherapy device according to the wavelength pre-compensation algorithm, solves the problem of wavelength drift caused by temperature, achieves precise control of the target center wavelength of the phototherapy device, achieves precise treatment of the phototherapy device, greatly improves the treatment effect, and has become a target that the industry urgently needs to improve. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a method for precise control of the wavelength of a phototherapy device, which enables the wavelength of the LED light source in the phototherapy device to be pre-compensated according to the wavelength pre-compensation algorithm, thereby solving the problem of wavelength drift caused by temperature, achieving precise control of the target center wavelength of the phototherapy device, achieving precise treatment of the phototherapy device, greatly improving the treatment effect, and thus overcoming the shortcomings of existing phototherapy devices.

[0006] To address the aforementioned technical problems, this invention provides a method for precise wavelength control of a phototherapy device. The phototherapy device uses a single-wavelength LED light source, and the method employs a wavelength pre-compensation algorithm to pre-compensate the wavelength of the single-wavelength LED light source. The wavelength pre-compensation algorithm is as follows:

[0007] Δλt =K*(t-t0)*(λ0-λ r )

[0008] Where, Δλ t λ0 represents the wavelength shift of the center wavelength of the LED light source at chip temperature t relative to the center wavelength at the standard reference temperature t0; t is the chip temperature when the LED light source is operating; t0 is the standard reference temperature of the LED light source chip; λ0 is the center wavelength of the LED light source chip at temperature t0 ... r The cutoff wavelength for visible and ultraviolet light is taken as 403nm±5nm; K is the temperature drift coefficient of the center wavelength of the LED light source, taken as 0.0005±0.0002, with the unit being 1 / degree Celsius.

[0009] Subtract Δλ from the target center wavelength t The obtained center wavelength is used to select the LED light source of the phototherapy device, thereby achieving precise wavelength control of the phototherapy device.

[0010] In a further improvement, the chip temperature t of the LED light source is kept constant during operation by a liquid cooling system. The liquid cooling system includes a liquid cooling plate and a heat sink connected in a loop to it. The PCD board of the single-wavelength LED light source is fixed on the liquid cooling plate to keep the LED light source temperature constant.

[0011] In a further improvement, the phototherapy device includes at least two single-wavelength LED light sources, and the liquid cooling system includes at least two liquid cooling plates that are arranged one-to-one with the single-wavelength LED light sources, with the at least two liquid cooling plates connected in series.

[0012] As another improvement of the present invention, the present invention also provides a phototherapy device based on the above-described method for precise control of the wavelength of the phototherapy device, wherein the center wavelength of the LED light source of the phototherapy device is the target center wavelength minus Δλ. t get.

[0013] In a further improvement, the phototherapy device also includes a central processing unit, which includes a control module connected to and controlling the single-wavelength LED light source to turn it on and off.

[0014] As a further improvement of the present invention, the present invention also provides a phototherapy device based on the above-mentioned precise control method of the wavelength of the phototherapy device. The phototherapy device further includes a central processing unit, which includes a control module. The control module is connected to the single-wavelength LED light source and controls its opening and closing, and is also connected to the heat sink and controls the airflow of the cooling fan therein.

[0015] In a further improvement, the central processing unit also includes a data acquisition module connected to the control module, which is used to acquire target temperature control data and transmit the acquired data to the control module.

[0016] With this design, the present invention has at least the following advantages:

[0017] 1. The method for precise wavelength control of the phototherapy device of the present invention achieves pre-compensation of the wavelength of a single-wavelength LED light source by using a wavelength pre-compensation algorithm. That is, by taking an early pre-compensation step, the problem of wavelength drift caused by LED light source heating can be effectively solved, ensuring that the wavelength of the phototherapy device is precisely controlled, thereby achieving the purpose of precise treatment by the phototherapy device.

[0018] 2. Furthermore, by employing liquid cooling plates that correspond one-to-one with the LED light sources, and the liquid cooling heat dissipation system composed of them, the chip temperature of all visible light and infrared light LED light sources can be controlled at a constant value. This allows for more precise control of the LED light source wavelength pre-compensation, ensuring that the wavelength shift caused by the rise in chip temperature during actual treatment is exactly consistent with the target wavelength. This achieves the goal of maintaining a constant and precise center wavelength and power spectrum distribution of the treatment light throughout the entire treatment process, thereby ensuring that the spectrum, intensity, and energy of visible light and infrared light are precisely controlled during treatment, achieving a precise treatment effect.

[0019] 3. The phototherapy device of this invention is based on a precise wavelength control method, which enables precise control of the wavelength of the phototherapy device, meeting the requirements of precision treatment. Furthermore, the phototherapy device employs a series-connected liquid cooling system, ensuring the heat sink is kept away from the LED lamp head, thus eliminating noise during treatment and significantly improving the customer experience. Attached Figure Description

[0020] The above is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0021] Figure 1 This is a schematic diagram of the structure of the phototherapy device of the present invention. Detailed Implementation

[0022] Example 1

[0023] See attached document Figure 1 As shown, the phototherapy device in this embodiment includes n single-wavelength LED light sources, such as light source 1, light source 2... light source N, and also includes a liquid cooling system that is cyclically connected by a liquid cooling plate and a heat sink.

[0024] The liquid cooling system includes a number of metal liquid cooling plates equal to the number of single-wavelength LED light sources, such as liquid cooling plate 1, liquid cooling plate 2, ..., liquid cooling plate N. Each single-wavelength LED light source is arranged in a one-to-one correspondence with a liquid cooling plate, that is, the single-wavelength LED light source is set on a PCD board, and the PCD board is set on the liquid cooling plate. Multiple liquid cooling plates are connected in series to remove heat from the LED light sources, thereby achieving a constant temperature of the LED light sources and ensuring the stability of the emitted wavelength of the LED light sources.

[0025] In this embodiment, the heat sink is an existing heat sink with a cooling fan and a heat sink plate. The heat sink plate is connected in series with the liquid cooling plate. A circulating coolant is provided to pass the low-temperature coolant through the liquid cooling plate in sequence to achieve heat exchange with the corresponding LED light source. Then, the high-temperature coolant with the increased liquid temperature is circulated to the heat sink plate. The temperature of the high-temperature coolant is reduced by the action of the cooling fan. The circulation is repeated to achieve a constant temperature of the LED light source.

[0026] The phototherapy device described in this embodiment also includes a central processing unit (CPU). The CPU includes a control module connected to and controlling the single-wavelength LED light source to control its on / off state, thereby controlling the operation of the phototherapy device. The control module is also connected to the heat sink and controls the airflow of the cooling fan therein to control the temperature of the coolant in the heat sink, thus controlling the temperature of the circulating coolant and consequently the operating temperature of the LED light source.

[0027] The central processing unit also includes a data acquisition module connected to the control module. The data acquisition module adopts a human-machine interface mode to collect target temperature control data input by the user and transmit the collected data to the control module. The control module controls the airflow of the cooling fan to ultimately control the operating temperature of the LED light source.

[0028] Example 2

[0029] This embodiment of the phototherapy device includes n single-wavelength LED light sources and a central processing unit. The central processing unit includes a control module, which is connected to and controls the n single-wavelength LED light sources to achieve on / off control of the phototherapy device.

[0030] The phototherapy device employs a wavelength pre-compensation algorithm to pre-compensate the wavelength of a single-wavelength LED light source, thereby achieving precise control of the wavelength within the phototherapy device.

[0031] Specifically, the wavelength pre-compensation algorithm is as follows:

[0032] Δλ t =K*(t-t0)*(λ0-λ r )

[0033] Where, Δλ t λ0 represents the wavelength shift of the center wavelength of the LED light source at chip temperature t relative to the center wavelength at the standard reference temperature t0; t is the chip temperature when the LED light source is operating; t0 is the standard reference temperature of the LED light source chip; λ0 is the center wavelength of the LED light source chip at temperature t0 ... r The cutoff wavelength for visible and ultraviolet light is taken as 403nm±5nm; K is the temperature drift coefficient of the center wavelength of the LED light source, taken as 0.0005±0.0002, with the unit being 1 / degree Celsius.

[0034] Then subtract Δλ from the target center wavelength. t By obtaining the center wavelength and selecting the LED light source of the phototherapy device, the problem of wavelength drift of the phototherapy device at the working temperature can be effectively solved, and precise control of the wavelength of the phototherapy device can be obtained.

[0035] Example 3

[0036] The difference between this embodiment and the first embodiment described above is that the phototherapy device also uses a wavelength pre-compensation algorithm to perform a pre-compensation step on the wavelength of a single-wavelength LED light source, so as to achieve precise control of the wavelength in the phototherapy device.

[0037] Specifically, the wavelength pre-compensation algorithm is the same as in Embodiment 2. In this embodiment, based on the liquid cooling system maintaining a constant LED light source temperature, it can further achieve precise control of the wavelength of the phototherapy device through pre-compensation of the LED light source, thus better ensuring the precise treatment of the phototherapy device.

[0038] Example 4

[0039] The phototherapy device developed in Example 3 was started at different ambient temperatures. The chip temperature of its LED light source was measured at different time points after startup. At the same time, the peak wavelength and center wavelength of the light emitted by the phototherapy device at the time points were measured. The results are shown in Table 1 below.

[0040] Table 1. Measurement results of the actual working wavelength of the phototherapy device in Example 3.

[0041]

[0042] Example 5

[0043] Using a well-known brand of phototherapy device of the same model 830 on the market as a control, the peak wavelength and center wavelength of the light emitted by the phototherapy device were measured at different ambient temperatures and at different time points. The results are shown in Table 2 below.

[0044] Table 2. Measurement results of the actual working wavelength of a certain brand of phototherapy device of the same model.

[0045]

[0046] As shown in Table 2 above, a well-known brand of 830 intense pulsed light therapy device, through forced cooling with a fan, experiences a rise in the chip temperature of the LED light source with changes in ambient temperature. This results in a significant deviation between the actual wavelength of the light emitted during treatment and the wavelength stated on the product label. For example, as shown in Table 2, the measured wavelength of the emitted light reached at least 833nm 60 seconds after the device was turned on, and as high as 840nm 30 minutes after power-on, far exceeding the stated 830nm. This indicates that the actual wavelength error of this brand's 830 intense pulsed light therapy device is substantial, making it unable to achieve precise treatment.

[0047] As shown in Table 1, the Keningmei 830 phototherapy device of this application effectively solves the problem of wavelength drift caused by the increase of temperature in the phototherapy device by adopting a precise wavelength control pre-compensation method and combining it with a hydraulic cooling system to control the temperature of the LED light source. As shown in Table 1, after 60 seconds of power-on, the measured value of the emitted light wavelength of the Keningmei 830 phototherapy device is basically controlled within the range of 830nm±2nm as stated on the product, and most of the treatment time after power-on is controlled within the range of 830nm±1nm. The wavelength control is precise and reliable, meeting the purpose of precise treatment of this phototherapy device.

[0048] The phototherapy device of this invention uses a multi-plate series liquid cooling system to control the chip temperature of all visible and infrared LED light sources at a constant value. By performing pre-compensation calculations on the wavelength of the LED light sources, the wavelength shift caused by the rise in chip temperature during treatment is made to match the target center wavelength. This achieves the goal of keeping the center wavelength and power spectrum distribution of the treatment light constant and precise throughout the entire treatment process, thus ensuring that the spectrum, intensity, and energy of visible and infrared light are precisely controlled during treatment, achieving a precise treatment effect.

[0049] The phototherapy device of this invention employs a series-connected liquid cooling system, which ensures that the heat sink is kept away from the LED lamp head, thereby eliminating noise during treatment and significantly improving the customer experience.

[0050] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Any simple modifications, equivalent changes, or alterations made by those skilled in the art using the disclosed technical content shall fall within the protection scope of the present invention.

Claims

1. A method for precisely controlling the wavelength of a phototherapy device, wherein the phototherapy device uses a single-wavelength LED light source, characterized in that, A wavelength pre-compensation algorithm is used to pre-compensate the wavelength of a single-wavelength LED light source. The wavelength pre-compensation algorithm is as follows: Dl t =K*(t-t0)*(λ0-λ r ) Where, Δλ t λ0 represents the wavelength shift of the center wavelength of the LED light source at chip temperature t relative to the center wavelength at the standard reference temperature t0; t is the chip temperature when the LED light source is operating; t0 is the standard reference temperature of the LED light source chip; λ0 is the center wavelength of the LED light source chip at temperature t0 ... r The cutoff wavelength for visible and ultraviolet light is taken as 403nm±5nm; K is the temperature drift coefficient of the center wavelength of the LED light source, taken as 0.0005±0.0002, with the unit being 1 / degree Celsius. Subtract Δλ from the target center wavelength t The obtained center wavelength is used to select the LED light source of the phototherapy device, thereby achieving precise wavelength control of the phototherapy device.

2. The method for precisely controlling the wavelength of a phototherapy device according to claim 1, characterized in that, When the LED light source is working, the chip temperature t is kept constant by a liquid cooling system. The liquid cooling system includes a liquid cooling plate and a heat sink connected to it in a loop. The PCD board of the single-wavelength LED light source is fixed on the liquid cooling plate to keep the LED light source temperature constant.

3. The method for precisely controlling the wavelength of a phototherapy device according to claim 2, characterized in that, The phototherapy device includes at least two single-wavelength LED light sources, and the liquid cooling system includes at least two liquid cooling plates that are arranged one-to-one with the single-wavelength LED light sources, and the at least two liquid cooling plates are arranged in series.

4. A phototherapy device based on the precise wavelength control method of the phototherapy device according to claim 1, characterized in that, The center wavelength of the LED light source in the phototherapy device is the target center wavelength minus Δλ. t get.

5. The phototherapy device according to claim 4, characterized in that, The phototherapy device also includes a central processing unit, which includes a control module connected to and controlling the single-wavelength LED light source.

6. A phototherapy device based on the precise wavelength control method of the phototherapy device according to claim 2 or 3, characterized in that, The phototherapy device also includes a central processing unit, which includes a control module. The control module is connected to the single-wavelength LED light source and controls its on / off state. It is also connected to the heat sink and controls the airflow of the cooling fan therein.

7. The phototherapy device according to claim 6, characterized in that, The central processing unit also includes a data acquisition module connected to the control module. The data acquisition module is used to acquire target temperature control data and transmit the acquired data to the control module.

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