CN218248147U - Phototherapy circuit and phototherapy device - Google Patents

Abstract

The application discloses phototherapy circuit and phototherapy device. The phototherapy circuit includes: the device comprises at least two light-emitting modules, at least two driving modules and at least two protection modules, wherein one driving module is connected with one light-emitting module, and the driving modules are used for driving the light-emitting modules to emit light at preset frequency and preset power according to driving signals; the control of different driving modules to different light-emitting modules is mutually independent; and one protection module is connected with one drive module and used for protecting the drive module when overvoltage and overcurrent occur. A plurality of light emitting modules are independently controlled to emit light through a plurality of driving modules respectively, so that the frequency and the power of light waves in different areas are controlled to meet the phototherapy requirements of different parts of a user in a targeted mode, and overvoltage and overcurrent protection is carried out on the driving modules through the arrangement of the protection modules.

Description

Phototherapy circuit and phototherapy device

Technical Field

The application relates to the technical field of medical care, in particular to a phototherapy circuit and a phototherapy device.

Background

In the related art, a phototherapy instrument is usually provided with a plurality of light emitting devices, the light emitting devices generally set their light wave frequencies and powers uniformly, and the conditions of different parts of a user are different, so that it is difficult to satisfy the phototherapy requirements of different parts of the user in a targeted manner, and the driving circuit for driving a plurality of light emitting devices is prone to overvoltage and overcurrent.

SUMMERY OF THE UTILITY MODEL

The present application is directed to solving at least one of the problems in the prior art. Therefore, the phototherapy circuit is provided by the application, the phototherapy requirements of different parts of a user can be met at the same time in a targeted mode through independently controlling the frequency and the power of the light waves of different areas, and overvoltage and overcurrent protection can be carried out on related driving circuits.

The application still provides a phototherapy device that has above-mentioned phototherapy circuit.

A phototherapy circuit according to an embodiment of the first aspect of the application, includes: at least two light emitting modules; the driving module is used for driving the light-emitting module to emit light at a preset frequency and a preset power according to a driving signal; the control of different driving modules to different light-emitting modules is mutually independent; the protection module is connected with one of the driving modules and used for protecting the driving module when overvoltage and overcurrent occur.

The phototherapy circuit according to this application embodiment has at least following beneficial effect: a plurality of light emitting modules are independently controlled to emit light through a plurality of driving modules respectively, so that the frequency and the power of light waves in different areas are controlled to meet the phototherapy requirements of different positions of a user in a targeted mode, and overvoltage and overcurrent protection is carried out on the driving modules through the protection modules.

According to some embodiments of the present application, the light emitting module includes at least one light emitting unit, the driving module includes a driving chip, the driving chip includes at least one driving end, one driving end is connected to one light emitting unit, and the driving end is used for driving the light emitting unit to emit light.

According to some embodiments of the application, the light emitting unit comprises a first light emitting tube, a second light emitting tube, a third light emitting tube, a fourth light emitting tube and a current limiting resistor, wherein one end of the current limiting resistor is connected with a power supply, the other end of the current limiting resistor is respectively connected with an anode of the first light emitting tube and an anode of the second light emitting tube, an anode of the third light emitting tube is respectively connected with a cathode of the first light emitting tube and a cathode of the second light emitting tube, a cathode of the third light emitting tube is connected with the driving chip, an anode of the fourth light emitting tube is respectively connected with a cathode of the first light emitting tube and a cathode of the second light emitting tube, and a cathode of the fourth light emitting tube is connected with the driving chip.

According to some embodiments of the present application, the driving module further includes a control unit, the driving chip further includes a control end, the control unit is connected to the control end, and the control unit is configured to control a driving output of the driving chip according to the driving signal.

According to some embodiments of the application, the control unit comprises a first resistor, one end of the first resistor is connected with the control end, and the other end of the first resistor is grounded.

According to some embodiments of the present application, the driving module further includes an enabling unit, the driving chip further includes an enabling terminal, the enabling unit is connected to the enabling terminal, and the enabling unit is configured to control the driving chip to operate according to an external enabling signal.

According to some embodiments of the present application, the enabling unit includes a second resistor, a third resistor and a triode, the driver chip further includes a power end, one end of the second resistor is connected to the power end, the other end of the second resistor is connected to the enabling end, a collector of the triode is connected to the enabling end, an emitter of the triode is grounded, a base of the triode is connected to one end of the third resistor, and the other end of the third resistor is used for acquiring an external enabling signal.

According to some embodiments of the present application, the protection module includes a fourth resistor and a voltage regulator tube, one end of the fourth resistor is connected to a power supply, the other end of the fourth resistor is connected to the power supply end, a negative electrode of the voltage regulator tube is connected to the power supply end, and a positive electrode of the voltage regulator tube is grounded.

A phototherapy device according to an embodiment of a second aspect of the present application includes the phototherapy circuit of the above-described embodiment of the first aspect.

Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.

Drawings

The present application is further described with reference to the following figures and examples, in which:

FIG. 1 is a block diagram of an embodiment of a phototherapy circuit of the present application;

FIG. 2 is a block diagram of another embodiment of a phototherapy circuit of the present application;

FIG. 3 is a circuit diagram of an embodiment of a phototherapy circuit of the present application;

fig. 4 is a circuit diagram of an embodiment of the light emitting unit shown in fig. 2.

Reference numerals are as follows:

the light emitting module 100, the driving module 200, the protection module 300, the light emitting unit 110, and the driving chip 210;

a control unit 220, an enabling unit 230.

Detailed Description

Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.

In the description of the present application, the meaning of a plurality is one or more, the meaning of a plurality is two or more, and the above, below, exceeding, etc. are understood as excluding the present number, and the above, below, within, etc. are understood as including the present number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present application, unless otherwise specifically limited, terms such as set, installed, connected and the like should be understood broadly, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present application in combination with the specific contents of the technical solutions.

The phototherapy circuit of this application embodiment can be applied to phototherapy equipment, such as phototherapy helmet. Phototherapy is a physical therapy method for preventing and treating diseases by using the radiation ability of visible rays or invisible rays. Red and near infrared light can penetrate human tissues and produce beneficial effects on the human body by stimulating cells. This stimulation allows the body to produce more adenosine triphosphate which supplies energy to the cells and also enhances cell viability. Therefore, the human body is beneficial to the health of the human body when being irradiated by light with proper frequency, and the blood circulation of the brain is promoted when the head of the human body is irradiated by light with proper frequency. In the related art, a phototherapy instrument is usually provided with a plurality of light emitting devices, the light emitting devices generally set their light wave frequencies and powers uniformly, and the conditions of different parts of a user are different, so that it is difficult to satisfy phototherapy requirements of different parts of the user in a targeted manner, and a driving circuit for driving the plurality of light emitting devices is prone to overvoltage and overcurrent.

Based on this, this application provides a phototherapy circuit and phototherapy device, through the phototherapy demand that frequency and power of the different regional light wave of independent control satisfy the different positions of user simultaneously with pertinence, can carry out excessive pressure overcurrent protection to relevant drive circuit in addition.

Some embodiments, referring to fig. 1, a phototherapy circuit includes: the protection circuit comprises at least two light emitting modules 100, at least two driving modules 200 and at least two protection modules 300, wherein one driving module 200 is connected with one light emitting module 100, and the driving module 200 is used for driving the light emitting module 100 to emit light at a preset frequency and preset power according to a driving signal; wherein, the different driving modules 200 control the different light emitting modules 100 independently; a protection module 300 is connected to a driving module 200, and the protection module 300 is used for protecting the driving module 200 in case of overvoltage and overcurrent.

In the embodiment of the present application, the driving signal refers to a control signal input by a user through an external controller according to actual requirements. The external controller can be a key controller or a touch screen. The user selects the target operating power and the target operating frequency of the light emitting modules 100 corresponding to different portions according to the use requirement, and thus sets the preset frequency and the preset power of each light emitting module 100 in the external controller. The external controller outputs corresponding driving signals according to user settings and a preset operation mode to respectively control the driving modules 200 to work, and each driving module 200 controls the corresponding light emitting module 100 to work at a target operation power and a target operation frequency according to preset frequency and preset power setting information in the driving signals, so that independent control of different light emitting operation powers and operation frequencies is realized.

The light emitting module 100 is provided with a plurality of light emitting devices, and the protection module 300 can stabilize the operating voltage and the operating current of the driving module 200, and prevent the driving module 200 from driving all the light emitting devices of the light emitting module 100 at the same time, which may cause an excessive voltage or current, thereby protecting the driving module 200.

The phototherapy circuit of this application embodiment has at least following beneficial effect: the plurality of light emitting modules 100 are independently controlled to emit light through the plurality of driving modules 200 respectively, so that the frequency and the power of light waves in different areas are controlled to meet the phototherapy requirements of different parts of a user in a targeted manner, and overvoltage and overcurrent protection is performed on the driving modules 200 through the arrangement of the protection module 300.

In some embodiments, referring to fig. 2 and 3, the light emitting module 100 includes at least one light emitting unit 110, the driving module 200 includes a driving chip 210, and the driving chip 210 includes at least one driving end, one driving end is connected to one light emitting unit 110, and the driving end is used for driving the light emitting unit 110 to emit light. The driving terminals of the driving chips 210 correspond to the light emitting units 110 of the light emitting module 100 one to one. In this embodiment, as shown in fig. 3, the driving chip 210 is an MBI1816 chip, which has sixteen driving terminals (OUT 0-OUT 15), and can drive sixteen light emitting units 110 to operate at most simultaneously. It is understood that the specific type of the driver chip 210 is selected according to actual requirements.

In some embodiments, referring to fig. 4, the light emitting unit 110 includes a first light emitting tube D1, a second light emitting tube D2, a third light emitting tube D3, a fourth light emitting tube D4 and a current limiting resistor R5, one end of the current limiting resistor R5 is connected to the power supply, the other end of the current limiting resistor R5 is connected to the anode of the first light emitting tube D1 and the anode of the second light emitting tube D2, the anode of the third light emitting tube D3 is connected to the cathode of the first light emitting tube D1 and the cathode of the second light emitting tube D2, the cathode of the third light emitting tube D3 is connected to the driving chip 210, the anode of the fourth light emitting tube D4 is connected to the cathode of the first light emitting tube D1 and the cathode of the second light emitting tube D2, and the cathode of the fourth light emitting tube D4 is connected to the driving chip 210. The third light-emitting tube D3 is connected with the first light-emitting tube D1 and the second light-emitting tube D2 in series, the fourth light-emitting tube D4 is connected with the first light-emitting tube D1 and the second light-emitting tube D2 in series, the first light-emitting tube D1 is connected with the second light-emitting tube D2 in parallel, and the third light-emitting tube D3 is connected with the fourth light-emitting tube D4 in parallel, so that the normal work of other light-emitting tubes is not influenced when one light-emitting tube is damaged, the reliability of the light-emitting unit 110 is improved, and the maintenance cost is reduced. As shown in fig. 4, the light emitting tube of the present embodiment is preferably a light emitting diode.

In some embodiments, referring to fig. 2 and 3, the driving module 200 further includes a control unit 220, the driving chip 210 further includes a control terminal REXT, the control unit 220 is connected to the control terminal REXT, and the control unit 220 is configured to control the driving output of the driving chip 210 according to the driving signal. The control terminal REXT of the driving chip 210 receives the driving signal and controls the magnitude of the current output from the driving terminal of the driving chip 210 and the magnitude of the frequency of the output signal according to the pulse width and the frequency of the driving signal.

In some embodiments, referring to fig. 3, the control unit 220 includes a first resistor R1, one end of the first resistor R1 is connected to the control terminal REXT, and the other end of the first resistor R1 is grounded. The maximum value of the driving-end output current of the driving chip 210 can be controlled by changing the resistance value of the first resistor R1. In one embodiment, the first resistor R1 may be replaced with a variable resistor to facilitate adjusting the resistance of the access circuit without having to re-weld a new resistor.

In some embodiments, referring to fig. 2 and fig. 3, the driving module 200 further includes an enabling unit 230, and the driving chip 210 further includes an enabling terminal OE, the enabling unit 230 is connected to the enabling terminal OE, and the enabling unit 230 is configured to control the driving chip 210 to operate according to an external enabling signal. The enable terminal OE is used for controlling whether the driving chip 210 is in an operating state. In this embodiment, referring to fig. 3, when the driving chip 210 is an MBI1816 chip, the enable end OE is triggered at low level, that is, when the enable end OE is at low level, the driving chip 210 is in a working state; when the enable terminal OE is at a high level, the driving chip 210 is in an inactive state.

In some embodiments, referring to fig. 3, the enabling unit 230 includes a second resistor R2, a third resistor R3, and a transistor Q1, the driving chip 210 further includes a power terminal VDD, one end of the second resistor R2 is connected to the power terminal VDD, the other end of the second resistor R2 is connected to an enabling terminal OE, a collector of the transistor Q1 is connected to the enabling terminal OE, an emitter of the transistor Q1 is grounded, a base of the transistor Q1 is connected to one end of the third resistor R3, and the other end of the third resistor R3 is used for obtaining an external enabling signal. The transistor Q1 functions as a switching device, and the power source terminal VDD of the driving chip 210 is connected to a power source and thus in a high state. When no external enable signal is input, the transistor Q1 operates in an off state, the emitter and the collector of the transistor are not turned on, the enable terminal OE of the driver chip 210 is connected to the power supply terminal VDD through the second resistor R2, and therefore, the driver chip 210 is in a high level state, and does not operate. When an external enable signal is input to the base of the transistor Q1 through the third resistor R3, the transistor Q1 operates in a saturation state, the emitter and the collector of the transistor Q1 are connected, the enable end OE of the driver chip 210 is directly grounded through the transistor Q1 and is in a low level state, and at this time, the driver chip 210 operates. When the emitter and the collector of the transistor Q1 are turned on, the second resistor R2 can prevent the power supply terminal VDD of the driver chip 210 from being grounded to a low level, so as to maintain the power supply required by the operation of the driver chip 210.

In some embodiments, referring to fig. 3, the protection module 300 includes a fourth resistor R4 and a voltage regulator D5, one end of the fourth resistor R4 is connected to the power supply, the other end of the fourth resistor R4 is connected to the power supply terminal VDD, a negative electrode of the voltage regulator D5 is connected to the power supply terminal VDD, and a positive electrode of the voltage regulator D5 is grounded. And the voltage stabilizing tube D5 comprises a two-terminal voltage stabilizing tube and a three-terminal voltage stabilizing tube. As shown in fig. 3, the zener diode D5 of the present embodiment is a zener diode, and when the zener diode is in reverse breakdown, the terminal voltage is almost unchanged within a certain current range (or within a certain power loss range), so as to achieve a voltage stabilizing effect. In the exemplary embodiment, a three-terminal voltage regulator block may be used to regulate the voltage of the power supply terminal VDD of the driving chip 210.

In some embodiments, a phototherapy device includes the phototherapy circuit of any of the embodiments described above.

In the description of the present application, reference to the description of "one embodiment," "some embodiments," or "exemplary embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The embodiments of the present application have been described in detail with reference to the drawings, but the present application is not limited to the embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present application. Furthermore, the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

Claims (9)

1. A phototherapy circuit, comprising:

at least two light emitting modules;

the driving module is used for driving the light-emitting module to emit light at a preset frequency and a preset power according to a driving signal; wherein the control of different driving modules to different light emitting modules is independent from each other;

the protection module is connected with one drive module and used for protecting the drive module when overvoltage and overcurrent occur.

2. The phototherapy circuit of claim 1, wherein the light emitting module comprises at least one light emitting unit, the driving module comprises a driving chip, the driving chip comprises at least one driving end, one driving end is connected to one light emitting unit, and the driving end is used for driving the light emitting unit to emit light.

3. The phototherapy circuit of claim 2, wherein the light emitting unit comprises a first light emitting tube, a second light emitting tube, a third light emitting tube, a fourth light emitting tube and a current limiting resistor, one end of the current limiting resistor is connected to a power supply, the other end of the current limiting resistor is connected to the anode of the first light emitting tube and the anode of the second light emitting tube, the anode of the third light emitting tube is connected to the cathode of the first light emitting tube and the cathode of the second light emitting tube, the cathode of the third light emitting tube is connected to the driving chip, the anode of the fourth light emitting tube is connected to the cathode of the first light emitting tube and the cathode of the second light emitting tube, and the cathode of the fourth light emitting tube is connected to the driving chip.

4. The phototherapy circuit of claim 2, wherein the driving module further comprises a control unit, the driving chip further comprises a control terminal, the control unit is connected to the control terminal, and the control unit is configured to control a driving output of the driving chip according to the driving signal.

5. The phototherapy circuit of claim 4, wherein the control unit comprises a first resistor, one end of the first resistor is connected to the control terminal, and the other end of the first resistor is grounded.

6. The phototherapy circuit of any one of claims 2 to 5, wherein the driving module further comprises an enabling unit, the driving chip further comprises an enabling terminal, the enabling unit is connected to the enabling terminal, and the enabling unit is configured to control the driving chip to operate according to an external enabling signal.

7. The phototherapy circuit according to claim 6, wherein the enabling unit comprises a second resistor, a third resistor and a transistor, the driver chip further comprises a power supply terminal, one end of the second resistor is connected to the power supply terminal, the other end of the second resistor is connected to the enabling terminal, a collector of the transistor is connected to the enabling terminal, an emitter of the transistor is grounded, a base of the transistor is connected to one end of the third resistor, and the other end of the third resistor is used for obtaining an external enabling signal.

8. The phototherapy circuit of claim 7, wherein the protection module comprises a fourth resistor and a voltage regulator tube, one end of the fourth resistor is connected to a power source, the other end of the fourth resistor is connected to the power source end, a negative electrode of the voltage regulator tube is connected to the power source end, and a positive electrode of the voltage regulator tube is grounded.

9. Phototherapy device, characterized in that it comprises a phototherapy circuit according to any one of claims 1 to 8.

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