An output optical pulse modulation method

Abstract

The present invention discloses an output optical pulse modulation method, where the output light is used for intense pulsed light dry eye treatment, and it includes a control main board and a lamp power supply board; the output optical pulse modulation method is a pulse control algorithm. A single-chip microcomputer runs the program of the pulse algorithm to achieve the output of pulse signals, and then the output signals are passed through the control main board and the lamp power supply board to finally control the light-emitting discharge module and the lamp to output in the form of optical pulses; the output optical pulse modulation method is a pulse control algorithm, and its logic manifestation is: based on the single-chip microcomputer for control, three timers are used to control the trigger, duty cycle, number of pulses of the single-chip microcomputer to output the PWM wave, and the delay time between each small string of pulse trains, and the output control of the PWM wave waveform is carried out through this. The structure design of the present invention is reasonable and is convenient for improving the treatment effect on dry eye patients.

Description

Technical Field

[0001] The present invention relates to the field of medicine, and particularly to an output optical pulse modulation method. Background Art

[0002] Currently, the common strong pulsed light type of therapeutic instruments on the market mainly output a string of pulses with the same duty cycle. However, the energy output by this pulsed light has an insignificant therapeutic effect on dry eye disease. What can truly achieve a perfect therapeutic effect is the control of pulsed light with three large pulses and one small pulse. The three large pulses first heat the skin. During the low-level period between the pulses, heat transfer occurs inside the skin; three consecutive large pulses; immediately followed by the output of a small pulse, waiting for the energy to accumulate for auxiliary heating and heat transfer in order to dredge and treat the meibomian glands.

[0003] To solve the above problems, the present invention provides an output optical pulse modulation method. Summary of the Invention

[0004] The purpose of the present invention is to overcome the above problems existing in the prior art, and provide an output optical pulse modulation method. By means of a pulse control algorithm, a determined pulse signal is output, and the pulse signal is output to a xenon lamp tube through a control circuit to trigger the xenon lamp tube to output a determined optical pulse, so as to achieve the treatment of patients with dry eye disease.

[0005] To achieve the above technical purpose and reach the above technical effect, the present invention is realized through the following technical solutions:

[0006] An output optical pulse modulation method, wherein the output light is used for the treatment of dry eye with strong pulsed light, and includes a control main board and a lamp tube power supply board;

[0007] The control main board includes a main control chip, a voltage comparator, a modulation signal output circuit, and an interface one connected to the lamp tube power supply board;

[0008] The lamp tube power supply board includes a charging module, a light-emitting discharge module and a lamp tube, an optocoupler, a feedback controller, a light-emitting signal sampling and feedback device, and an interface two connected to the control main board;

[0009] The output optical pulse modulation method is a pulse control algorithm. A single-chip microcomputer runs a program of the pulse algorithm to realize the output of the pulse signal, and then the output signal is passed through the control main board and the lamp tube power supply board, and finally the light-emitting discharge module and the lamp tube are controlled to output in the form of optical pulses;

[0010] The output optical pulse modulation method is a pulse control algorithm, and its logical manifestation is as follows: controlled by a single-chip microcomputer, three timers are used to control the triggering, duty cycle, number of pulses, and the delay time between each small string of pulse strings of the single-chip microcomputer to output PWM waves. By controlling the output waveform of the PWM waves, the modulation of the output optical pulses is achieved. The finally output optical pulses are eight pulses, divided into two groups of the first four and the last four. Among the four in each group, the first three are high and narrow waveforms, and the fourth is a low and slightly wider waveform.

[0011] The steps of the pulse control algorithm are as follows:

[0012] Step 1: When the light-emitting button is pressed, the main control chip obtains the light-emitting signal.

[0013] Step 2: The main control chip sets the pulse parameters, including the pulse period and the duty cycle; turns on the PWM waveform output and starts to output the waveform. When a string of waveforms is output, the chip turns off the waveform output, enters the interrupt of Timer 2, sets the delay between two small pulse strings, and then starts the pulse delay timing.

[0014] Step 3: After the timing ends, enter the interrupt when the delay ends, that is, the interrupt of Timer 3. Set the parameters of the next string of pulses within the interrupt, turn on the PWM output, and start to output the next string of pulses.

[0015] Step 4: Determine whether all pulses have been output.

[0016] Step 5: If not all waveforms have been output, set the delay time between this pulse string and the next pulse string, and then start the delay. After the delay ends, jump to Step 3.

[0017] Step 6: If all have been output, then end.

[0018] Preferably, the parameters of the pulse modulation are as follows:

[0019] The pulse signal consists of eight large pulse strings; among them, the first pulse string has only one small pulse string, and the first pulse string consists of several small pulses with the same duty cycle; among the remaining seven pulse strings, each contains two small pulse strings, one before and one after, and each small pulse string contains several small pulses with the same duty cycle.

[0020] Preferably, in the waveform of each small pulse string, the parameters include: pulse period, duty cycle, number of pulses, and the delay time between pulse strings between two small pulse strings; among them, the number of pulses in different pulse strings may be the same or different, but the number of pulses in each small string is fixed; among the parameters of the pulses, only the number of pulses is immutable, and for the remaining parameters, the error of the pulse period is plus or minus 5 μs, the maximum duty cycle is plus or minus 1%, and the delay time is plus or minus 5 μs.

[0021] Preferably, the main control chip is a single-chip microcomputer with a 32-bit Cortex-M7 core. There are GPIO ports, ADC ports and DAC ports on the main control chip. The control signal required by the modulation signal output circuit is output by one of the channels of the DAC port of the main control chip. The output signal of the modulation signal output circuit is connected to the pulse output signal terminal in the interface one. The inputs of the voltage comparator are the other channel of the DAC port of the main control chip and the current sampling feedback signal terminal of the interface two. The output signal of the voltage comparator is connected to the modulation signal output circuit. The charging voltage monitoring signal and the charging control signal of the interface one are respectively connected to the ADC port channel of the main control chip and the charging control signal connection port of the pulse output port.

[0022] Preferably, the same-name interfaces on the control main board are respectively connected to the charging control signal, charging voltage monitoring signal, pulse output signal and current sampling feedback signal in the lamp tube power supply board correspondingly. The charging control signal and charging voltage monitoring signal of the interface two are connected to the charging module. The charging module includes a DC power supply and a capacitor. The feedback controller is connected to the pulse output signal. The feedback controller is connected to the optocoupler. The optocoupler and the charging module are jointly connected to the light-emitting and discharging module and the lamp tube. The light-emitting and discharging module and the lamp tube are connected to the light-emitting signal sampling and feedback device. The output of the light-emitting signal sampling and feedback device is divided into two paths, one path to the feedback controller and the other path to the current sampling feedback signal terminal of the interface two.

[0023] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0024] The structure of the present invention is reasonably designed. The pulse signal generated by the pulse control algorithm is amplified by the control main board circuit to generate a pulse control signal, and then transmitted to the lamp tube power supply board. Then, the xenon lamp tube is triggered by the lamp tube power supply board to output a strong pulse light, so that the meibum can be heated through the photothermal effect, the blockage of the meibomian gland can be dredged, and the dry eye can be relieved; it can be preferentially absorbed by hemoglobin, block the capillaries around the meibomian gland gland, inhibit the spread of inflammatory factors, and kill bacteria and other microorganisms, reducing the generation of inflammation; and it can resuscitate the atrophied meibomian gland by stimulating cells, so that the function of the meibomian gland can be restored.

[0025] Of course, it is not necessary for any product implementing the present invention to achieve all the above-mentioned advantages simultaneously. Description of the Drawings

[0026] To more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the accompanying drawings required for the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings.

[0027] Figure 1 The waveform of the pulse control signal provided by the present invention;

[0028] Figure 2 The waveform of the small pulses of the first pulse train provided by the present invention;

[0029] Figure 3 The pulse waveform of any one of the latter seven pulse trains among the eight pulse trains provided by the present invention;

[0030] Figure 4 The contour diagram of the eight pulse trains provided by the present invention;

[0031] Figure 5 The waveform of the optical pulse output by the xenon lamp tube provided by the present invention;

[0032] Figure 6 The operation flowchart of the pulse control algorithm provided by the present invention;

[0033] Figure 7 The model diagram of the control main board circuit provided by the present invention;

[0034] Figure 8 The schematic diagram of the lamp tube power supply board provided by the present invention;

[0035] Figure 9 The parameter chart 1 of the pulse train provided by the present invention;

[0036] Figure 10 The parameter chart 2 of the pulse train provided by the present invention;

[0037] Figure 11 The parameter chart 3 of the pulse train provided by the present invention;

[0038] Figure 12 The parameter chart 4 of the pulse train provided by the present invention. Detailed implementation manners

[0039] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0040] Please refer to Figures 1-12 As shown, an output optical pulse modulation method, where the output light is used for intense pulsed light dry eye treatment, includes a control main board and a lamp power supply board;

[0041] The control main board includes a main control chip, a voltage comparator, a modulation signal output circuit, and an interface one connected to the lamp power supply board, and is used to control the charge and discharge of the lamp power supply board and obtain the real-time working feedback signal of the charge and discharge of the lamp power supply board to ensure the safe and stable operation of the lamp power supply board;

[0042] The main control chip is a 32-bit single-chip microcomputer with a Cortex-M7 core. At least a GPIO (General-Purpose Input / Output) port, an ADC (Analog-to-Digital Converter) port, and a DAC (Digital-to-Analog Converter) port are set on the main control chip. The ADC port is used to connect the sampling feedback for monitoring the charging capacitor voltage on the lamp power supply board. The DAC port is used to connect the voltage comparator and the modulation signal output circuit. The control signal required by the modulation signal output circuit is output by one of the channels of the DAC port of the main control chip. The output signal of the modulation signal output circuit is connected to the pulse output signal terminal in the interface one. The modulation signal output circuit is used to obtain the modulation pulse trigger signal output by the main control chip, amplify it, and output it to the lamp power supply board through the pulse output interface of the interface one. The input of the voltage comparator is the other channel of the DAC port of the main control chip and the current sampling feedback signal terminal of the interface two. The output signal of the voltage comparator is connected to the modulation signal output circuit. The charging voltage monitoring signal and the charging control signal of the interface one are respectively connected to the ADC port channel of the main control chip and the charging control signal connection port of the pulse output port;

[0043] The voltage comparator is used to set the instantaneous maximum current when the pulsed light of the lamp power supply board emits light. When the current is higher than the set threshold, the voltage comparator outputs a high level to turn off the pulse output of the modulation signal output circuit. That is, the voltage comparator compares the real-time sampling signal of the discharge current of the lamp power supply board with the highest safety current threshold set in the control chip. When the sampling signal is higher than the set current threshold, it outputs a high level to close the pulse output port of the modulation signal output circuit and prohibit the pulse output of the modulation signal output circuit;

[0044] The lamp power supply board includes a charging module, a light-emitting discharge module, a lamp (the lamp is a xenon lamp), an optocoupler, a feedback controller, a light-emitting signal sampling feedback device, and an interface two connected to the control main board. The interface two is used to transmit the control information on the control main board circuit and the charge and discharge feedback information of the lamp power supply board circuit; the control information includes: the lamp power supply board capacitor charging switch signal, the pulse output signal; the charge and discharge feedback information includes: the lamp power supply board capacitor charging voltage sampling signal, the lamp discharge current real-time sampling signal;

[0045] The interfaces with the same name on the control main board are respectively connected to the charging control signal, charging voltage monitoring signal, pulse output signal and current sampling feedback signal connected to the lamp power board. The charging control signal and charging voltage monitoring signal of interface two are connected to the charging module. The charging module includes a DC power supply and a capacitor. The feedback controller is connected to the pulse output signal, and the feedback controller is connected to the optocoupler. The optocoupler and the charging module are jointly connected to the light-emitting discharge module and the lamp. The light-emitting discharge module and the lamp are connected to the light-emitting signal sampling feedback device. The output of the light-emitting signal sampling feedback device is divided into two paths, one path to the feedback controller, and the other path to the current sampling feedback signal terminal of interface two;

[0046] The GPIO port is used to connect the charging switch of the handle and the lamp power board. That is, in the GPIO port, one is used as a switch to connect and control the handle, and the other is used as a charging control switch signal, which is connected to the charging control signal port of interface one. Through this port, it is further connected to the charging control signal port of interface two on the lamp power board, and then connected to the charging module to control the DC power supply in the charging module to charge the discharge capacitor;

[0047] The handle is used as a switch to start the light emission of the xenon lamp. Since the handle is connected to a connection port on the GPIO port of the main control chip, after the GPIO port obtains the control signal of the handle, a series of pulse sequences are generated. Through one path of the DAC port on the main control chip, a pulse modulation signal is output to the modulation signal output circuit. The pulse signal is amplified in the modulation signal output circuit and then output to the amplified pulse signal output port of the lamp power board. Further, the signal is output to the amplified pulse signal input port of interface two. The feedback controller obtains the signal of the amplified pulse signal input port, and then outputs it to the optocoupler. The signal reaches the light-emitting discharge module and the lamp through the optocoupler, controlling the light-emitting discharge module and the lamp to generate a strong pulse signal to excite the lamp to output pulsed light;

[0048] The output optical pulse modulation method is a pulse control algorithm. The single-chip microcomputer runs the program of the pulse algorithm to realize the output of the pulse signal, and then the output signal passes through the control main board and the lamp power board to finally control the light-emitting discharge module and the lamp to output in the form of optical pulses;

[0049] The output optical pulse modulation method is a pulse control algorithm, and its logical manifestation is: based on the single-chip microcomputer for control, three timers are used to control the trigger, duty cycle, number of pulses and the delay time between each small string of pulse strings of the single-chip microcomputer to output the PWM wave. Through the control of the PWM wave waveform output, the modulation of the output optical pulse is realized. The finally output optical pulse is eight pulses, divided into two groups of the first four and the last four. Among the four in each group, the first three are high and narrow waveforms, and the fourth is a low and slightly wide waveform (as Figure 5 shown);

[0050] The steps of the pulse control algorithm are as follows:

[0051] Step 1: When the light-emitting button is pressed, the main control chip obtains the light-emitting signal.

[0052] Step 2: The main control chip sets the pulse parameters, including the pulse period and duty cycle; enables the PWM waveform output and starts to output the waveform. When a string of waveforms is output (i.e., the pulse counting ends), the chip closes the waveform output, enters the interrupt of Timer 2, sets the delay between two small pulse strings, and then starts the pulse delay timing.

[0053] Step 3: After the timing ends, enter the interrupt of the end of the delay (i.e., the interrupt of Timer 3), set the parameters of the next string of pulses in the interrupt, enable the PWM output, and start to output the next string of pulses.

[0054] Step 4: Determine whether all pulses have been output.

[0055] Step 5: If the waveforms have not all been output, set the delay time between this pulse string and the next one, then start the delay. After the delay ends, jump to Step 3.

[0056] Step 6: If all have been output, end.

[0057] The parameters of the pulse modulation are as follows:

[0058] The pulse signal consists of eight large pulse strings (as Figure 1 shown); among them, the first pulse string has only one small pulse string, and the first pulse string consists of several small pulses with the same duty cycle (as Figure 2 shown); in the remaining seven pulse strings, each contains two small pulse strings before and after, and each small pulse string contains several small pulses with the same duty cycle (as Figure 3 shown);

[0059] In the waveform of each small pulse string, the parameters include: pulse period, duty cycle, number of pulses, and the delay time between two small pulse strings.

[0060] Among them, the number of pulses in different pulse strings may be the same or different, but the number of pulses in each small string is fixed. Among the parameters of the pulses, only the number of pulses is immutable. For the remaining parameters, the error of the pulse period is plus or minus 5 μs, the maximum duty cycle is plus or minus 1%, and the delay time is plus or minus 5 μs.

[0061] The parameters of the pulse string are as shown in the Figures 9-12 table, where the units of the pulse period and the delay time are μs, the unit of the number of pulses is piece, and the duty cycle is shown as a percentage.

[0062] The first string has only one pulse string

[0063] Period: 180 μs; Duty cycle: 25%; Number of pulses: 22; Delay time: 800 μs

[0064] The second string, two pulse trains

[0065] 2 strings, 1 segment

[0066] Period: 165 μs; Duty cycle: 5%; Number of pulses: 80; Delay time: 10 μs

[0067] 2 strings, 2 segments

[0068] Period: 150 μs; Duty cycle: 25%; Number of pulses: 40; Delay time: 600 μs

[0069] The third string, two pulse trains

[0070] 3 strings, 1 segment

[0071] Period: 150 μs; Duty cycle: 4%; Number of pulses: 100; Delay time: 5 μs

[0072] 3 strings, 2 segments

[0073] Period: 120 μs; Duty cycle: 35%; Number of pulses: 50; Delay time: 1200 μs

[0074] The fourth string, two pulse trains

[0075] 4 strings, 1 segment

[0076] Period: 180 μs; Duty cycle: 10%; Number of pulses: 126; Delay time: 5 μs

[0077] 4 strings, 2 segments

[0078] Period: 100 μs; Duty cycle: 20%; Number of pulses: 120; Delay time: 800 μs.

[0079] A specific application of this embodiment is as follows: The structure of the present invention is reasonably designed. The pulse signal generated by the pulse control algorithm is amplified by the control main board circuit to generate a pulse control signal, which is then transmitted to the lamp power supply board. The lamp power supply board then triggers the xenon lamp to output a strong pulse light. Among them, the first three narrow pulse waveforms heat the meibum through the photothermal effect to dredge the meibomian gland, so that the blocked secretions of the meibomian gland can be discharged faster, and thus dry eye can be alleviated;

[0080] Dividing the narrow pulse into three avoids skin damage caused by long-term pulsed light irradiation on the skin surface, enables the therapeutic effects of the three pulses to be superimposed, further reduces the risk of damage to the surface skin, and improves safety;

[0081] The fourth low and wide waveform is used to wait for the focusing of light heat, selectively seal abnormally dilated capillaries, and reduce the generation of inflammation.

[0082] In the description of this specification, the description with reference to terms such as "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0083] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not elaborate on all the details, nor do they limit the invention to the specific implementation manners. Obviously, many modifications and variations can be made according to the content of this specification. These embodiments are selected and specifically described in this specification in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can well understand and utilize the present invention. The present invention is only limited by the claims and their full scope and equivalents.

Claims

1. An output optical pulse modulation method, where the output light is used for strong pulsed light dry eye treatment, and is characterized in that: It includes a control main board and a lamp tube power supply board; The control main board includes a main control chip, a voltage comparator, a modulation signal output circuit, and an interface one connected to the lamp tube power supply board; The lamp tube power supply board includes a charging module, a light-emitting discharge module, a lamp tube, an optocoupler, a feedback controller, a light-emitting signal sampling and feedback device, and an interface two connected to the control main board; The output optical pulse modulation method is a pulse control algorithm. A single-chip microcomputer runs the program of the pulse algorithm to achieve the output of pulse signals. Then, the output signals are transmitted through the control main board and the lamp tube power supply board, and finally, the light-emitting discharge module and the lamp tube are controlled to output in the form of optical pulses; Its logical manifestation is: based on the control of the single-chip microcomputer, three timers are used to control the trigger, duty cycle, number of pulses, and the delay time between each small string of pulse strings of the single-chip microcomputer to output the PWM wave. Through the control of the PWM wave waveform output, the modulation of the output optical pulses is achieved. The finally output optical pulses are eight pulses, divided into two groups of the first four and the last four. Among the four in each group, the first three are high and narrow waveforms, and the fourth is a low and slightly wider waveform; The steps of the pulse control algorithm are as follows: Step 1: When the light-emitting button is pressed, the main control chip obtains the light-emitting signal; Step 2: The main control chip sets the pulse parameters, including the pulse period and the duty cycle; enables the PWM waveform output and starts to output the waveform. When a string of waveforms is output, the chip closes the waveform output, enters the interruption of Timer 2, sets the delay between two small pulse strings, and then starts the pulse delay timing; Step 3: After the timing ends, it enters the interruption of the end of the delay, that is, the interruption of Timer 3. In the interruption, it sets the parameters of the next string of pulses, enables the PWM output, and starts to output the next string of pulses; Step 4: Determine whether all pulses have been output; Step 5: If the waveforms have not all been output, set the delay time between this pulse string and the next string of pulses, then start the delay. After the delay ends, jump to Step 3; Step 6: If all have been output, then end; The parameters of the pulse modulation are as follows: The first string, with only one pulse string Period: 180 μs; Duty cycle: 25%; Number of pulses: 22; Delay time: 800 μs; The second string, with two pulse strings 2 strings, 1 segment Period: 165 μs; Duty cycle: 5%; Number of pulses: 80; Delay time: 10 μs 2 strings, 2 segments Period: 150 μs; Duty cycle: 25%; Number of pulses: 40; Delay time: 600 μs The third string, with two pulse strings 3 strings, 1 segment Period: 150 μs; Duty cycle: 4%; Number of pulses: 100; Delay time: 5 μs; 3 strings, 2 segments Period: 120 μs; Duty cycle: 35%; Number of pulses: 50; Delay time: 1200 μs; The fourth string, with two pulse strings 4 strings, 1 segment Period: 180 μs; Duty cycle: 10%; Number of pulses: 126; Delay time: 5 μs; 4 strings, 2 segments Period: 100 μs; Duty cycle: 20%; Number of pulses: 120; Delay time: 800 μs.

2. The output optical pulse modulation method according to claim 1, wherein: The pulse signal consists of eight large pulse trains; among them, the first pulse train has only one small pulse train, and the first pulse train is composed of several small pulses with the same duty cycle; among the remaining seven pulse trains, each contains two small pulse trains before and after, and each small pulse train contains several small pulses with the same duty cycle.

3. A method for output optical pulse modulation according to claim 2, characterized in that: In the waveform of each small pulse train, the parameters include: pulse period, duty cycle, number of pulses, and the delay time between two small pulse trains; among them, the number of pulses in different pulse trains may be the same or different, but the number of pulses in each small train is fixed; among the parameters of the pulses, only the number of pulses is immutable, and for the remaining parameters, the error of the pulse period is plus or minus 5 μs, the maximum duty cycle is plus or minus 1%, and the delay time is plus or minus 5 μs.

4. A method for modulating an output optical pulse according to claim 1, wherein: The main control chip is a single-chip microcomputer with a 32-bit Cortex-M7 core. There are GPIO ports, ADC ports, and DAC ports on the main control chip. The control signal required by the modulation signal output circuit is output from one of the channels of the DAC port of the main control chip. The output signal of the modulation signal output circuit is connected to the pulse output signal terminal in Interface 1. The input of the voltage comparator is the other channel of the DAC port of the main control chip and the current sampling feedback signal terminal of Interface 2. The output signal of the voltage comparator is connected to the modulation signal output circuit. The charging voltage monitoring signal and the charging control signal of Interface 1 are respectively connected to the ADC port channel of the main control chip and the charging control signal connection port of the pulse output port.

5. A method for output optical pulse modulation according to claim 1, characterized in that: The same-named interfaces on the control main board are respectively connected corresponding to the charging control signal, charging voltage monitoring signal, pulse output signal, and current sampling feedback signal in the lamp tube power supply board. The charging control signal and the charging voltage monitoring signal of Interface 2 are connected to the charging module. The charging module includes a DC power supply and a capacitor. The feedback controller is connected to the pulse output signal. The feedback controller is connected to the optocoupler. The optocoupler and the charging module are jointly connected to the light-emitting and discharging module and the lamp tube. The light-emitting and discharging module and the lamp tube are connected to the light-emitting signal sampling feedback device. The output of the light-emitting signal sampling feedback device is divided into two paths, one path to the feedback controller, and the other path to the current sampling feedback signal terminal of Interface 2.

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