Endoscope light source device, endoscope system, and light emission control method

Abstract

The embodiment of the application discloses an endoscope light source device, an endoscope system and a light-emitting control method, and belongs to the technical field of cold light sources. In the embodiment of the application, the endoscope light source device comprises an MCU, a light adjusting assembly, a timing circuit, a light-emitting circuit and a power supply. In the case that the power supply is powered off for a short time (that is, the power-off time is not more than a power-off time threshold) and is powered on again, the MCU can read the stored first state information based on the timing signal of the timing circuit, and control the light-emitting circuit to emit the light beam of the first state again based on the first state information through the first control signal, that is, the light-emitting state adjusted by the user before is restored, so that the medical staff does not need to manually adjust the equipment again, thereby avoiding the delay of the examination, diagnosis or operation progress of the medical staff.

Description

TECHNICAL FIELD

[0001] Embodiments of the present application relate to the technical field of cold light sources, and in particular to an endoscope light source device, an endoscope system, and a light emission control method. BACKGROUND

[0002] At present, cold light sources are widely used in the medical field. For example, cold light sources are used in medical endoscopes to facilitate the examination, diagnosis, or surgery of the patient's internal body through the light beams emitted by the cold light sources. Taking surgery as an example, medical personnel need to set the light emission state of the cold light source by adjusting the equipment during the preparation process of the surgery, and during the surgery, the camera module of the endoscope captures the patient's internal body by means of the high-brightness irradiation of the cold light source, so that the medical personnel can perform surgery on the patient by observing clear and stable images.

[0003] However, during the use of the cold light source, there may be a power failure or power outage, which causes the light beams emitted by the cold light source to become dim or even not to emit light, thereby delaying the examination, diagnosis, or surgery progress of the medical personnel, and even threatening the safety of the patient.

[0004] In the related art, the cold light source is reset to a non-light emission state after a short power failure or power outage and re-powering. The medical personnel also need to manually adjust the equipment again to restore the cold light source to the light emission state before the power failure. Since it takes some time to adjust the equipment again, this also delays the examination, diagnosis, or surgery progress of the medical personnel, and even threatens the safety of the patient. SUMMARY

[0005] Embodiments of the present application provide an endoscope light source device, an endoscope system, and a light emission control method, which can automatically restore the light emission state previously adjusted by user operation in the case of a short power failure (i.e., the power failure time does not exceed the power failure time threshold) and re-powering, without the need for medical personnel to manually adjust the equipment again, thereby not delaying the examination, diagnosis, or surgery progress of the medical personnel. The technical solution is as follows:

[0006] On the one hand, an endoscope light source device is provided, which comprises a micro control unit (MCU), a light adjustment assembly, a timing circuit, a light emission circuit, and a power supply;

[0007] The MCU is electrically connected to the light adjustment assembly, the timing circuit, the light emission circuit, and the power supply, and the light adjustment assembly, the timing circuit, and the light emission circuit are also electrically connected to the power supply;

[0008] The MCU is configured to store the first state information when the first state information is received, and output a first control signal to the light emitting circuit based on the first state information, the first control signal being used to control the light emitting circuit to emit a light beam of a first state of a plurality of states, the first state information being determined by the dimming assembly according to a detected user operation;

[0009] The MCU is further configured to, in a case where the power supply is powered off and then powered on again, acquire a timing signal of the timing circuit, read the first state information if a power-off duration indicated by the timing signal does not exceed a power-off time threshold, and output the first control signal to the light emitting circuit based on the first state information again.

[0010] Optionally, the timing signal is a one-level signal, if the timing signal is a first-level signal, the power-off duration indicated by the timing signal does not exceed the power-off time threshold, and if the timing signal is a second-level signal, the power-off duration indicated by the timing signal exceeds the power-off time threshold.

[0011] Optionally, the timing circuit comprises a timer, the timer has a key pin KEY and an output pin OUT, the power supply has a first power supply end, the KEY pin is electrically connected to the first power supply end, and the OUT pin is electrically connected to the MCU.

[0012] In a case where the power supply is powered off, the power supply causes the KEY pin of the timing circuit to generate and output a power-off signal to the OUT pin through the first power supply end, and the OUT pin generates the first-level signal under the triggering of the power-off signal.

[0013] The timer starts timing at the moment when the OUT pin generates the first-level signal, and continuously outputs the first-level signal through the OUT pin before the timing ends, and the duration between the timing start moment and the timing end moment of the timer is equal to the power-off time threshold.

[0014] Optionally, the timing circuit further comprises a power supply capacitor, the power supply further has a second power supply end, one end of the power supply capacitor is electrically connected to the second power supply end, and the other end is grounded.

[0015] The timer further has a voltage input pin VIN and a ground pin GND, the VIN pin is electrically connected to the second power supply end, and the GND pin is grounded.

[0016] The power supply supplies power to the timer through the second power supply end in a case where the power supply is not powered off, and charges the power supply capacitor, and the power supply capacitor supplies power to the timer in a case where the power supply is powered off.

[0017] Optionally, the power supply further has a third power supply end, which is electrically connected with the MCU, and the power supply supplies power to the MCU through the third power supply end.

[0018] The endoscope light source device further comprises a power supply cutoff circuit, one end of which is electrically connected with the third power supply end and the other end is grounded; the power supply cutoff circuit comprises a diode, a voltage dropping resistor and a voltage dropping capacitor connected in series, the positive pole of the diode is electrically connected with the third power supply end; the end of the power supply capacitor not grounded is electrically connected between the voltage dropping resistor and the voltage dropping capacitor.

[0019] The power supply cutoff circuit blocks the power supply capacitor from supplying power to the MCU in the case of power failure of the power supply.

[0020] Optionally, the endoscope light source device further comprises a first voltage dividing circuit, one end of which is electrically connected with the first power supply end and the other end is grounded; the first voltage dividing circuit comprises a first voltage dividing resistor and a second voltage dividing resistor connected in series, and the KEY pin is electrically connected between the first voltage dividing resistor and the second voltage dividing resistor.

[0021] The MCU has a first pin and a second pin, the first pin is electrically connected between the first voltage dividing resistor and the second voltage dividing resistor, and the second pin is electrically connected with the OUT pin.

[0022] Optionally, the endoscope light source device further comprises a first level inversion circuit, and the KEY pin is electrically connected between the first voltage dividing resistor and the second voltage dividing resistor through the first level inversion circuit; and / or,

[0023] The endoscope light source device further comprises a second level inversion circuit, and the OUT pin is electrically connected with the second pin of the MCU through the second level inversion circuit.

[0024] Optionally, the timing signal is a clock signal containing the current power failure time, and if the time difference between the time of the re-powering and the current power failure time does not exceed the power failure time threshold, the power failure duration indicated by the timing signal does not exceed the power failure time threshold.

[0025] In another aspect, an endoscope system is provided, which comprises a light source device and an imaging device, and the light source device comprises the device of the first aspect described above.

[0026] In another aspect, a light emitting control method is provided, which is applied to a micro control unit (MCU) included in an endoscope light source device, the endoscope light source device further comprising a dimming assembly, a timing circuit, a light emitting circuit and a power supply, the light emitting circuit being capable of emitting light beams in multiple states; the method comprising:

[0027] receiving and storing first state information, the first state information being determined by the dimming assembly according to a detected user operation;

[0028] outputting a first control signal to the light emitting circuit based on the first state information, so as to control the light emitting circuit to emit light beams in a first state, the first state being one of the multiple states;

[0029] in the case of power-off and re-power-on of the power supply, obtaining a timing signal of the timing circuit;

[0030] if the power-off duration indicated by the timing signal does not exceed a power-off time threshold, reading the first state information, and outputting the first control signal to the light emitting circuit again based on the first state information.

[0031] In another aspect, a computer readable storage medium is provided, the computer readable storage medium storing a computer program, the computer program being executed by a processor to implement the steps of the light emitting control method.

[0032] In another aspect, a computer program product containing instructions which, when run on a computer, cause the computer to perform the steps of the light emitting control method.

[0033] The technical solutions provided in the embodiments of the present application can bring at least the following beneficial effects:

[0034] In the embodiments of the present application, the endoscope light source device comprises an MCU, a dimming assembly, a timing circuit, a light emitting circuit and a power supply, in the case of short-time power-off (i.e. the power-off duration does not exceed a power-off time threshold) and re-power-on of the power supply, the MCU can read the stored first state information based on the timing signal of the timing circuit, and control the light emitting circuit to emit light beams in the first state again based on the first state information, i.e. restore the light emitting state previously adjusted by the user operation, without the need for medical staff to manually adjust the equipment again, thereby not delaying the examination, diagnosis or operation progress of the medical staff. BRIEF DESCRIPTION OF DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort based on these drawings.

[0036] Figure 1 is a structural schematic diagram of an endoscope system provided by an embodiment of the present application;

[0037] Figure 2 is a structural schematic diagram of another endoscope system provided by an embodiment of the present application;

[0038] Figure 3 is a structural schematic diagram of an external structure of a cold light source host provided by an embodiment of the present application;

[0039] Figure 4 is a structural schematic diagram of a logic structure of a cold light source host provided by an embodiment of the present application;

[0040] Figure 5 is a structural schematic diagram of an endoscope light source device provided by an embodiment of the present application;

[0041] Figure 6 is a structural schematic diagram of another endoscope light source device provided by an embodiment of the present application;

[0042] Figure 7 is a schematic diagram of a first voltage division circuit provided by an embodiment of the present application;

[0043] Figure 8 is a structural schematic diagram of still another endoscope light source device provided by an embodiment of the present application;

[0044] Figure 9 is a schematic diagram of a connection relationship between a second level inversion circuit and other components provided by an embodiment of the present application;

[0045] Figure 10 is a schematic diagram of a connection relationship between an MCU and other components provided by an embodiment of the present application;

[0046] Figure 11 is a flowchart of a light emitting control method provided by an embodiment of the present application;

[0047] Figure 12 is a signal timing diagram of an endoscope light source device in a normal starting condition provided by an embodiment of the present application;

[0048] Figure 13 is a signal timing diagram of an endoscope light source device in a long time power-off and then power-on condition provided by an embodiment of the present application;

[0049] Figure 14 is a signal timing diagram of an endoscope light source device in the case of instantaneous power failure and rapid re-powering provided by an embodiment of the present application. DETAILED DESCRIPTION

[0050] To make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the embodiments of the present application will be further described in detail below with reference to the drawings.

[0051] It should be noted that the system architecture and business scenarios described in the embodiments of the present application are for more clearly illustrating the technical solutions of the embodiments of the present application, and do not constitute a limitation on the technical solutions provided by the embodiments of the present application. Those skilled in the art can know that, with the evolution of system architecture and the appearance of new business scenarios, the technical solutions provided by the embodiments of the present application are also applicable to similar technical problems.

[0052] At present, a medical cold light source is used in examinations, diagnoses, treatments, surgeries and the like using an endoscope, and provides illumination for the field of view of the body cavity of the human body observed by the endoscope. For example, medical personnel insert a medical endoscope into the human body through a natural body cavity or a small surgical incision, and, by means of high-brightness illumination of the cold light source, make clinical diagnoses of internal organs and the like through a camera device (which can also be understood as an imaging system) of the endoscope, and perform diagnoses and treatments using surgical instruments.

[0053] The reliability of the light emission of the medical cold light source is an important guarantee for diagnoses, treatments, surgeries and the like using an endoscope. If the cold light source abnormally restarts without light emission during diagnoses or surgeries and the like, it may cause a medical accident, and even endanger the life of a patient.

[0054] In the related art, the cold light source usually does not emit light by default after starting, and medical personnel need to adjust the light emission state of the cold light source during the preparation process of the surgery, and ensure the stability of the light emission during diagnoses or surgeries and the like. However, more and more devices of the large-power and large-radiation type are integrated in the environment of the operating room, such as a large-power electrotome, a large-scale imaging device and the like. If the internal power supply voltage of the cold light source drops due to electrical interference or other factors of these devices under abnormal conditions, the cold light source may restart, and the cold light source does not emit light after restarting, which seriously affects the safety of diagnoses or surgeries.

[0055] In order to guarantee the light emission stability, the safety of the surgery and the safety of the patient, the embodiments of the present application provide an endoscope light source device, an endoscope system and a light emission control method, wherein the endoscope system includes a light source device and a camera device, and the light source device includes the endoscope light source device. The endoscope light source device can use the light emission control method to timely restore the light emission state adjusted by the user before the cold light source appears short-time power failure or power failure, so as to provide stable and reliable illumination for the camera device.

[0056] It should be understood that the light source device can be a cold light source device or other types of light source devices. In the following embodiments, the light source device is taken as an example of a cold light source device. In addition, the light source device can be applied not only to endoscopes in the medical field, but also to other instruments in the medical field, and can also be applied to related instruments in other fields. In the following embodiments, the light source device is taken as an example of being applied to an endoscope in the medical field (i.e., the light source device includes an endoscope light source device).

[0057] Before the light emission control method provided by the embodiments of the present application is explained in detail, the light source device provided by the embodiments of the present application will be introduced first. Figures 1 to 4 The implementation environment to which the embodiments of the present application can be applied will be introduced.

[0058] Figure 1 is a structural schematic diagram of an endoscope system provided by the embodiments of the present application. Referring to Figure 1 , the endoscope system includes a light source device and a camera device.

[0059] The light source device includes a cold light source host and a light guide assembly (such as Figure 1 indicated light guide beam), and the cold light source host has a communication port and a light output interface. The light output interface is used to connect the light guide assembly to transmit the light beam of the cold light source to the camera device. The communication port can be used to connect other devices (such as the camera device) for communication.

[0060] The camera device includes a camera host, a video line, and an optical assembly. The camera host has a communication port and a video output interface. The video output interface is used to output the collected video or picture. The communication port is also used to connect other devices for communication. The optical assembly includes a camera, an optical adapter, and a mirror rod, etc. Among them, the camera has a key, and medical personnel can operate the key to take pictures or stop taking pictures, the optical adapter is used to provide a good view and optimize the field of view, etc., and the mirror rod is used to extend into the patient's body. The video line is used to connect the camera and the camera host, so as to transmit the video or picture collected by the camera to the camera host.

[0061] Generally, the endoscope system also includes a display device. Referring to Figure 1 , in the embodiments of the present application, the display device is a separate display. Of course, in some other embodiments, the display device can be integrated with the camera host.

[0062] Figure 2 is a structural schematic diagram of another endoscope system provided by the embodiments of the present application. Figure 2 The main difference between Figure 1 is that Figure 1The cold light source host and the camera host are two independent hosts, as shown in FIG. 2.

[0063] Figure 3 FIG. 1 is a schematic diagram of an external structure of a cold light source host according to an embodiment of the present application. Referring to FIG. 1, the cold light source host has a power-on / off button, a light adjusting assembly (including but not limited to an operation button, a display screen or a touch screen, etc.), a light guide interface (i.e., an outlight interface), a communication port, a power cord, etc. Figure 3 Figure 3 The operation button, the display screen or the touch screen, etc. are shown in FIG. 1.

[0064] Figure 4 FIG. 2 is a schematic diagram of a logic structure of a cold light source host according to an embodiment of the present application. Referring to FIG. 2, the cold light source host includes an MCU, a light adjusting assembly (including a button assembly and / or a touch screen, etc.), a timing circuit, a light emitting circuit (including a light emitting driving assembly, a light emitting lamp and a light machine assembly, etc.), a light guide assembly (connected to a light guide beam), a power supply (connected to a power cord) and an interface terminal (such as a communication port). Optionally, the cold light source host further includes a sensor device, a heat sink and a fan assembly, etc. The heat sink and the fan assembly can be used for heat dissipation of the light emitting circuit. Figure 4

[0065] The timing circuit includes a timer, which is also called a timing chip, a timer, a timing chip, an RTC (Real-time Clock) chip or a clock chip, etc.

[0066] In the embodiment of the present application, the timer has two implementation modes. In the first implementation mode, the timer is used to generate a first level signal at the moment when the power supply starts to power off and start timing, and flip the first level signal to a second level signal after the timing ends. Correspondingly, the MCU is used to detect whether the timing signal of the timer is the first level signal or the second level signal after the power supply is powered on again, so as to determine whether the power-off duration exceeds the power-off time threshold. As can be seen, in this implementation mode, the timer has the function of timing triggering, such as the timer being a timing chip.

[0067] In the second implementation mode, the timer is used to output a clock signal including the moment of this power-off to the MCU at the moment of power-off. Correspondingly, the MCU is used to determine that the power-off duration does not exceed the power-off time threshold in the case that the time difference between the moment of power-on and the moment of this power-off does not exceed the power-off time threshold. As can be seen, in this implementation mode, the timer has the function of outputting a clock signal, such as the timer being an RTC chip.

[0068] Of course, in the embodiment of the present application, the timer can also have the functions of timing triggering and outputting a clock signal at the same time, and one of the two functions can be used in the process of controlling the light emitting.​​

[0069] It should be understood that the endoscope light source device provided by the embodiments of the present application can be applied to Figures 1 to 4 the cold light source host shown in FIG. 1. Figure 1 and Figure 2 the endoscope system shown in FIG. 2, and Figure 3 and Figure 4 the cold light source host shown in FIG. 3 do not limit the embodiments of the present application. The endoscope light source device provided by the embodiments of the present application can also be applied to other structures of endoscope systems and cold light source hosts.

[0070] Next, the endoscope light source device provided by the embodiments of the present application will be introduced in combination with Figures 5 to 10 .

[0071] Figure 5 is a structural schematic diagram of an endoscope light source device 500 provided by the embodiments of the present application. Referring to Figure 5 , the endoscope light source device 500 includes an MCU 501, a dimming assembly 502, a timing circuit 503, a light emitting circuit 504 and a power supply 505. Among them, the MCU 501 is electrically connected with the dimming assembly 502, the timing circuit 503, the light emitting circuit 504 and the power supply 505 respectively, and the dimming assembly 502, the timing circuit 503 and the light emitting circuit 504 are also electrically connected with the power supply 505 respectively.

[0072] The MCU 501 is used to store the first state information in the case of receiving the first state information, and output the first control signal to the light emitting circuit 504 based on the first state information, the first control signal is used to control the light emitting circuit 504 to emit the light beam of the first state of the plurality of states, and the first state information is determined by the dimming assembly 502 according to the detected user operation.

[0073] That is, the light emitting circuit 504 can emit light beams of multiple states, the dimming assembly 502 is used to detect user operation, generate first state information according to the detected user operation, and send the first state information to the MCU 501 to control the light emitting circuit 504 to emit the light beam of the first state through the MCU 501. Among them, the light beam of the first state is the light beam matched with the first state information, that is, the light beam adjusted by the user.

[0074] The MCU 501 is also used to acquire the timing signal of the timing circuit 503 in the case of power failure and re-powering of the power supply 505, if the power failure time length indicated by the timing signal does not exceed the power failure time threshold, read the first state information, and output the first control signal to the light emitting circuit 504 again based on the first state information to control the light emitting circuit 504 to emit the light beam of the first state again.

[0075] That is, the timing circuit 503 is configured to generate the timing signal in the case that the power supply 505 is powered off for a short time, and output the timing signal to the MCU 501, so as to trigger the MCU 501 to read the first state information in the case that the power supply 505 is powered on again, and output the first control signal to the light-emitting circuit 504 based on the first state information again.

[0076] In the present embodiment, the short time power-off refers to a power-off time that is less than a power-off time threshold. The power-off time threshold is a set value, such as 1 minute, 30 seconds, or 10 minutes, etc. Alternatively, the user can adjust the power-off time threshold according to the requirement.

[0077] As can be seen from the above, the timing circuit includes a timer, and the timer has at least two implementation manners. Next, the structure of the timing circuit 503 and the functions of the components in the timing circuit 503 in the two implementation manners are introduced respectively.

[0078] In the first implementation manner, the timing signal is a level signal. If the timing signal is a first level signal, the timing signal indicates that the power-off time is less than the power-off time threshold. If the timing signal is a second level signal, the timing signal indicates that the power-off time is greater than the power-off time threshold. That is, the MCU can determine the power-off time of the power supply according to the level signal output by the timing circuit.

[0079] Alternatively, referring to Figure 7 , the timing circuit 503 includes a timer 5031, and the timer 5031 has a KEY (key) pin and an OUT (output) pin. The power supply 505 has a first power supply end, the KEY pin is electrically connected to the first power supply end, and the OUT pin is electrically connected to the MCU 501.

[0080] In the case that the power supply 505 is powered off, the power supply 505 causes the KEY pin of the timing circuit 503 to generate and output a power-off signal to the OUT pin, and the OUT pin generates a first level signal under the triggering of the power-off signal. The timer 5031 starts timing at the moment when the OUT pin generates the first level signal, and continuously outputs the first level signal through the OUT pin before the timing ends. The time length between the timing start moment and the timing end moment of the timer 5031 is equal to the power-off time threshold.

[0081] At the timing end moment, the timer 5031 outputs a second level signal through the OUT pin, that is, the timer 5031 flips the first level signal to the second level signal. It should be noted that the KEY pin of the timer 5031 generates a power-off signal each time, and the timer 5031 re-timing.

[0082] Optionally, the first supply voltage provided by the first supply end of the power supply 505 is, for example, 12V, which is the supply voltage of the device. Of course, the first supply voltage provided by the first supply end can also be 3.3V or 5V, etc. The embodiments of the present application take 12V as the first supply voltage for example. Figure 6 The supply end providing 12V working voltage.

[0083] Optionally, referring to Figure 6 , the timing circuit 503 further comprises a supply capacitor C1, and the power supply 505 further has a second supply end (for example, the VCC end shown in Figure 6 ), one end of the supply capacitor C1 is electrically connected to the second supply end, and the other end is grounded. The timer 5031 further has a VIN (voltage input) pin and a GND (ground) pin, the VIN pin is electrically connected to the second supply end, and the GND pin is grounded. The power supply 505 supplies power to the timer 5031 through the second supply end in the case of no power failure, and charges the supply capacitor C1, and the supply capacitor C1 supplies power to the timer 5031 in the case of power failure of the power supply 505.

[0084] , the second supply voltage provided by the second supply end is, for example, 3.3V (volts), which is the working voltage of the chip. The second supply voltage provided by the second supply end can also be other values. In the embodiments of the present application, the second supply voltage is provided by the VCC end shown in Figure 6 , and the second supply voltage is Figure 6 The voltage of the VCC end after the 3.3V supply voltage provided by the supply end is passed through the diode VD1 and the resistor R42.

[0085] The supply capacitor C1 is a farad capacitor or other type of capacitor capable of storing energy. In the embodiments of the present application, the capacitance stored by the supply capacitor C1 can support the timer to work normally for a time not less than the power failure time threshold. Optionally, the capacitance value of the supply capacitor C1 is 0.22F or other values.

[0086] Optionally, the power supply 505 further has a third supply end, the third supply end is electrically connected to the MCU 505, and the power supply 505 supplies power to the MCU 501 through the third supply end. The endoscope light source device 500 further comprises a supply cutoff circuit 506, one end of the supply cutoff circuit 506 is electrically connected to the third supply end, and the other end is grounded. Referring to Figure 6 , the supply cutoff circuit 506 comprises a diode VD1, a step-down resistor R42 and a step-down capacitor C2 connected in series, the anode of the diode VD1 is electrically connected to the third supply end, and the ungrounded end of the supply capacitor C1 is electrically connected between the step-down resistor R42 and the step-down capacitor C2. The supply cutoff circuit 506 blocks the supply of the supply capacitor C1 to the MCU 501 in the case of power failure of the power supply 505.

[0087] The third power supply terminal can be the same as the second power supply terminal, for example, the second power supply terminal and the third power supply terminal are the same power supply terminal providing a 3.3V power supply voltage, that is, the third power supply voltage is also the working voltage 3.3V of the chip. Alternatively, the third power supply terminal can be different from the second power supply terminal, for example, the second power supply terminal provides a 2V power supply voltage, and the third power supply terminal provides a 3.3V power supply voltage. In the embodiment of the present application, the third power supply terminal is Figure 6 a power supply terminal providing a 3.3V power supply voltage.

[0088] The diode VD1 has a reverse blocking function. The resistance value of the voltage reduction resistor R42 can be 1K or other values. The capacitance value of the voltage reduction capacitor C2 can be 100nF or other values.

[0089] Optionally, the endoscope light source device 500 further comprises a first voltage division circuit 507, one end of the first voltage division circuit 507 is electrically connected with the first power supply terminal, and the other end is grounded. Referring to Figure 6 , the first voltage division circuit 507 comprises a first voltage division resistor 5071 and a second voltage division resistor 5072 connected in series, and the KEY pin of the timer 5031 is electrically connected between the first voltage division resistor 5071 and the second voltage division resistor 5072.

[0090] That is, the KEY pin of the timer 5031 can detect the voltage value of the connection point of the first voltage division resistor 5071 and the second voltage division resistor 5072, and when the power supply 505 is powered off, the input voltage of the KEY pin can trigger the KEY pin to generate a power-off signal, so that the OUT pin generates a first level signal in response to the power-off signal.

[0091] In the embodiment of the present application, referring to Figure 6 , the MCU 501 has at least two pins, including a first pin and a second pin, the first pin is electrically connected between the first voltage division resistor 5071 and the second voltage division resistor 5072, and the second pin is electrically connected with the OUT pin of the timer 5031.

[0092] Among them, the first pin of the MCU 501 is an ADC (Analog-to-Digital Converter) pin as shown in Figure 6 , and the second pin of the MCU 501 is a GPIO pin as shown in Figure 6 . In other embodiments, the second pin of the MCU 501 can also be an ADC pin.

[0093] Optionally, the MCU 501 is also capable of determining whether the power supply 505 is powered off by detecting the input voltage of the first pin, and further capable of detecting the degree of power-off of the power supply 505, such as detecting whether the voltage of the power supply 505 drops below the first voltage threshold or above the minimum critical voltage value. The minimum critical voltage value refers to the minimum voltage value at which the endoscope light source device 500 can work. That is, the MCU 501 can also automatically perceive the power-off of the power supply through the first pin itself.

[0094] In the embodiments of the present application, the MCU 501 performs a restart operation when detecting the power-off of the power supply 505 through the first pin, and reads the input signal of the second pin, i.e. the timing signal of the timing circuit, after the restart. The MCU 501 determines whether to perform the operation of outputting the first control signal to the light emitting circuit 504 based on the first state information based on the input signal of the second pin. That is, if the input signal of the second pin (i.e. the timing signal) indicates that the power-off duration does not exceed the power-off time threshold, the MCU 501 determines to perform the operation to restore the previous light emission state. If the input signal of the second pin indicates that the power-off duration exceeds the power-off time threshold, the MCU 501 determines not to perform the operation, but to perform a normal power-on operation to control the light emitting circuit 504 to be in the default state, which is the non-light emission state or a default light emission state.

[0095] It should be understood that when the voltage of the power supply 505 drops to the first voltage threshold, the light emitting circuit 504 cannot emit the light beam of the first state according to the adjusted light emission state, i.e. the first voltage threshold is the corresponding power supply voltage value at which the light emitting circuit 504 cannot work normally. In the case that the voltage of the power supply 505 continues to drop, in addition to the light emitting circuit 504 being unable to work normally, some other components of the endoscope light source device 500 can also be unable to work normally. However, since the voltage of the power supply 505 does not drop below the minimum critical voltage value, the MCU 501 can still perform the restart operation.

[0096] Taking the supply voltage of the device as 12V for example, the first voltage threshold can be 6V, and the minimum critical voltage value can be 1V.

[0097] Figure 7 A schematic diagram of the first voltage dividing circuit 507 provided in the embodiments of the present application is shown. Referring to FIG. 5, the first voltage dividing circuit 507 includes a first voltage dividing resistor R5071 and a second voltage dividing resistor R5072. Figure 7 In the embodiments of the present application, the resistance values of the first voltage dividing resistor R5071 and the second voltage dividing resistor R5072 are 10KΩ (kilo-ohm) and 2KΩ respectively. In some other embodiments, the resistance values of the first voltage dividing resistor R5071 and the second voltage dividing resistor R5072 can be determined according to the configuration of the timing circuit actually adopted, the supply voltage of the device, the working voltage of each component in the device, etc.

[0098] Optionally, referring to Figure 8 , the endoscope light source device 500 further comprises a first level inversion circuit 508, and the KEY pin of the timer 5031 is electrically connected between the first voltage dividing resistor 5071 and the second voltage dividing resistor 5072 through the first level inversion circuit 508.

[0099] Figure 9 is a structure of a first level inversion circuit 508 provided by an embodiment of the present application and a connection diagram with other components. Referring to Figure 9 , the first level inversion circuit 508 comprises resistors R33, R34, R35 and R36, and further comprises transistors V2 and V3. One end of the resistor R33 is electrically connected between the first voltage dividing resistor R5071 and the second voltage dividing resistor R502, and the other end is electrically connected to the base of the transistor V3. One end of the resistor R35 is electrically connected to the second power supply end (such as 3.3V) of the power supply, and the other end is electrically connected to the collector of the transistor V3. The emitter of the transistor V3 and the emitter of the transistor V2 are both grounded. One end of the resistor R34 is electrically connected to the second power supply end of the power supply, and the other end is electrically connected to the collector of the transistor V2. One end of the resistor R36 is electrically connected to the collector of the transistor V3, and the other end is electrically connected to the base of the transistor V2.

[0100] In the embodiment of the present application, the resistors R33, R34, R35 and R36 can be 1KΩ, 10KΩ, 10KΩ and 1KΩ respectively. Of course, the resistance values of the four resistors can also be adjusted adaptively.

[0101] It should be understood that a first level inversion circuit 508 is added between the KEY pin of the timer 5031 and the power-down detection point (i.e. the connection point of the first voltage dividing resistor 5071 and the second voltage dividing resistor 5072), so that the first level inversion circuit 508 inverts the low-level signal (i.e. the low-voltage signal of the power supply) of the power-down detection point into a high-level signal, and outputs the low-level signal to the KEY pin of the timer 5031, and the KEY pin generates a power-down signal under the triggering of the high-level signal. That is, the circuit can be designed flexibly by the person skilled in the art according to the triggering signal of the KEY pin of the timer.

[0102] Similarly, referring to Figure 6The endoscope light source device can further include a second level inversion circuit 509 (not labeled), and the OUT pin of the timer 5031 is electrically connected to the second pin of the MCU 501 through the second level inversion circuit 509. In this way, a second level inversion circuit 509 is added between the OUT pin of the timer 5031 and the second pin of the MCU, so that the second level inversion circuit 509 inverts the high-level signal generated by the OUT pin into a low-level signal, and outputs the low-level signal to the second pin of the MCU. The MCU reads the first state information under the triggering of the low-level signal, and outputs the first control signal to the light-emitting circuit based on the first state signal again. That is, the skilled person in the art can flexibly design the signal triggering the MCU to perform the corresponding operation as a low-level signal or a high-level signal.

[0103] Optionally, referring to Figure 6 The second level inversion circuit 509 includes a resistor R40, a resistor R41 and a transistor V1. One end of the resistor R40 is electrically connected to the OUT pin, and the other end is electrically connected to the base of the transistor V1. One end of the resistor R41 is electrically connected to the second power supply end, and the other end is electrically connected to the collector of the transistor V1. The emitter of the transistor V1 is grounded.

[0104] Next, please refer to Figure 10 The connection relationship and functions of the MCU 501 and other components in the embodiment of the application are introduced. Referring to Figure 10 The MCU 501 also has a grounded pin or interface. The grounded pin or interface of the MCU 501 is also electrically connected to one end of the capacitor C3, and the other end of the capacitor C3 is also electrically connected to the third power supply end. Figure 10 The "OFF-ON" signal in the embodiment of the application represents a received timing signal.

[0105] In the embodiment of the application, the capacitance value of the capacitor C3 can be 100nF, and the capacitance value of the capacitor C3 can also be selected as other values according to requirements.

[0106] The above introduces the first implementation mode of the timing circuit, and the second implementation mode of the timing circuit is introduced next.

[0107] In the second implementation mode, the timing signal is a clock signal containing the current power-off time. If the time difference between the power-on time of the power supply 505 and the current power-off time does not exceed the power-off time threshold, the power-off duration indicated by the timing signal does not exceed the power-off time threshold, the MCU 501 reads the first state information, and outputs the first control signal to the light-emitting circuit 504 based on the first state information again.

[0108] If the time difference between the time when the power supply 505 is re-powered and the time when the power is off this time exceeds the power-off time threshold, the power-off time indicated by the timing signal exceeds the power-off time threshold, the MCU 501 performs a restart operation, and controls the light emitting circuit 504 to be in the default state according to the normal start-up process.

[0109] It should be noted that in this implementation, the timer included in the timing circuit is a device capable of outputting a clock signal, and the timing circuit can include a power supply capacitor similar to the first implementation, which can supply power to the timer in the event of power failure, so that the timer can work normally. In addition, since the timing signal is not a high-level signal or a low-level signal, the endoscope light source device can not include the first level inversion circuit and the second level inversion circuit as in the first implementation.

[0110] From the above embodiments of the related parts of the endoscope system, it can be concluded that the application provides a timing signal output to the MCU by the timing circuit in the case of power failure, thereby realizing the recovery of the previous light output state in the case of short-time power failure.

[0111] It should be understood that, Figures 5 to 10 The endoscope light source device described is not intended to limit the application, and those skilled in the art can make Figures 5 to 10 Based on the structure and working principle of the endoscope light source device described above, the structure of the endoscope light source device 500 can be adjusted or expanded to achieve similar effects as the above embodiments.

[0112] For example, the above two level inversion circuits can also be other circuits with level inversion function. The endoscope light source device 500 can also include more level inversion circuits according to the actual design. For example, the timer can be ensured to work normally in the case of power failure by the above power supply capacitor, or can be replaced by a battery or other power storage device.

[0113] It should be noted that: the endoscope light source device provided by the above embodiments only divides the above functional modules for example when providing light for the endoscope, and in actual application, the above functions can be completed by different functional modules according to the needs, that is, the internal structure of the device is divided into different functional modules to complete all or part of the functions described above. In addition, the endoscope light source device provided by the above embodiments and the light emitting control method embodiments below belong to the same concept, and the specific implementation process can also be seen from the method embodiments below, which will not be repeated here.

[0114] Next, the light emitting control method provided by the application embodiments will be explained in detail.

[0115] Figure 11 is a flowchart of a light-emitting control method provided by an embodiment of the present application. The method is applied to an MCU included in an endoscope light source device, which also includes a light adjustment assembly, a timing circuit, a light-emitting circuit, and a power supply. The light-emitting circuit is capable of emitting light beams in multiple states. The endoscope light source device is as described in any of the endoscope light source devices 500 described above. In a specific implementation, the endoscope light source device is applied to any of the cold light source main machines described above. Please refer to Figures 5 to 10 Figures 1 to 4 Figure 11 The method includes the following steps.

[0116] Step 1101: The light adjustment assembly generates first state information according to a detected user operation, and sends the first state information to the MCU.

[0117] In an embodiment of the present application, the light-emitting circuit is capable of emitting light beams in multiple states, and the light adjustment assembly is capable of detecting a user operation, generating first state information according to the detected user operation, and sending the first state information to the MCU.

[0118] The light adjustment assembly includes, but is not limited to, operation buttons, a display screen, and / or a touch screen, etc. The light beams in multiple states refer to light beams with different brightness and / or color tones, etc. The first state information indicates the brightness value and / or color tone information adjusted by the user.

[0119] Step 1102: The MCU receives and stores the first state information.

[0120] As described above, the first state information is determined by the light adjustment assembly according to the detected user operation.

[0121] In an embodiment of the present application, the MCU can store the first state information immediately after receiving the first state information, or can store the first state information after subsequently receiving a timing signal. The MCU can also periodically store the first state information, for example, storing the current state information as the first state information every ten minutes.

[0122] Optionally, the MCU itself has a storage space, and the MCU stores the first state information in the storage space of itself. Alternatively, the endoscope light source device further includes a storage, and the MCU is capable of performing read and write operations on the storage. The MCU stores the first state information in the storage through a write operation.

[0123] Step 1103: The MCU outputs a first control signal to the light-emitting circuit based on the first state information, to control the light-emitting circuit to emit light beams in a first state.

[0124] The first state is one of the multiple states described above.

[0125] ​​In the embodiment of the present application, the MCU generates the first control signal based on the first state information, and sends the first control signal to the light emitting circuit. After receiving the first control signal, the light emitting circuit emits the light beam of the first state based on the first control signal.

[0126] As can be seen from the above, the light emitting circuit can include a light emitting driving component, a light emitting lamp, and a light machine component, etc. The MCU outputs the first control signal to the light emitting driving circuit, and the light emitting driving circuit generates a light emitting driving voltage or a light emitting driving current to the light machine component according to the first control signal, and the light machine component emits the light beam of the first state under the driving of the light emitting driving voltage or the light emitting driving current.

[0127] Step 1104: In the case of power failure, the timing circuit generates and outputs a timing signal to the MCU.

[0128] In the first implementation manner, the timing signal is a level signal. The timing signal is a first level signal or a second level signal. If the timing signal is the first level signal, the power failure duration indicated by the timing signal does not exceed the power failure time threshold; if the timing signal is the second level signal, the power failure duration indicated by the timing signal exceeds the power failure time threshold.

[0129] In the second implementation manner, the timing signal is a clock signal containing the current power failure time. If the time difference between the time when the power is re-powered and the current power failure time does not exceed the power failure time threshold, the power failure duration indicated by the timing signal does not exceed the power failure time threshold.

[0130] Step 1105: In the case of power failure and re-powering, the MCU acquires the timing signal.

[0131] In the embodiment of the present application, the MCU acquires the timing signal through the second pin.

[0132] Step 1106: If the power failure duration indicated by the timing signal does not exceed the power failure time threshold, the MCU reads the first state information, and outputs the first control signal to the light emitting circuit again based on the first state information.

[0133] In the embodiment of the present application, if the power failure duration indicated by the timing signal does not exceed the power failure time threshold, it means that the current power failure time is short, and the MCU controls the light emitting circuit to restore the previous light emitting state.

[0134] Next, the light emitting control method provided by the embodiment of the present application will be explained again with reference to the signal timing diagram shown in Figures 12 to 14 Figures 12 to 14 ​In the above-mentioned first implementation, taking the first implementation as an example, that is, the timing signal is a level signal, “12V” represents a signal timing diagram corresponding to a power supply voltage of the endoscope light source device, for example, the power supply voltage of the first power supply end in the embodiment of the present application is 12V under normal circumstances. “3.3V” represents a signal timing diagram corresponding to the working voltage of the chip, for example, the normal working voltage of the MCU is 3.3V, that is, the power supply voltage of the third power supply end in the embodiment of the present application is 3.3V under normal circumstances. “RES” represents a reset signal timing diagram of the endoscope light source device. “DET1” represents an input voltage timing diagram of the KEY pin of the timer. “OFF-ON” represents an input signal timing diagram received by the second pin of the MCU.

[0135] Figure 12 is a signal timing diagram of an endoscope light source device provided by the embodiment of the present application under normal starting conditions. Referring to Figure 12 , under normal starting conditions of the endoscope light source device, the signals corresponding to “12V”, “3.3V”, “RES” and “DET1” all rise rapidly from low level (that is, 0V) to high level corresponding to each other. For example, the signal corresponding to “12V” rapidly changes from low level to 12V high level, the signal corresponding to “3.3V” rapidly changes from low level to 3.3V high level, and the signal corresponding to “RES” changes from low level to high level due to the starting operation of the MCU. And because the endoscope light source device is started normally, the signal corresponding to “OFF-ON” is low by default and does not change level.

[0136] Figure 13 is a signal timing diagram of an endoscope light source device provided by the embodiment of the present application under long-time power-off and power-on conditions. Referring to Figure 13 , under long-time power-off conditions of the endoscope light source device, at the moment of power-off, the signals corresponding to “12V”, “3.3V” and “DET1” all rapidly drop from high level corresponding to each other to low level, and the low level at this time cannot support the working of the endoscope light source device. The signal corresponding to “RES” changes from low level to high level due to the attempt of the MCU to perform a reset operation, but because power-off causes the endoscope light source device to be unable to work, the reset fails, and the signal corresponding to “RES” remains high for a very short time. Similarly, the signal corresponding to “OFF-ON” changes from high level to low level due to power-off, but because the endoscope light source device is powered off for a long time, the MCU controls the reset to the default state.

[0137] Figure 14 is a signal timing diagram of an endoscope light source device provided by the embodiment of the present application under short-time power-off (such as instantaneous power-off) and rapid power-on conditions. Referring to Figure 14In the case of instantaneous power failure and rapid power recovery of the endoscope light source device, at the moment of instantaneous power failure, the signals corresponding to "12V", "3.3V", and "DET1" all rapidly drop from the respective corresponding high level to low level, and the low level at this time can still support the working of the endoscope light source device. The signal corresponding to "RES" will change from low level to high level due to the attempt of the MCU to perform the restart operation, and since the endoscope light source device can still work, the restart is successful, and the signal corresponding to "RES" will remain high. Similarly, the signal corresponding to "OFF-ON" will change from low level to high level due to power failure, and since the power supply is short-time power failure, the signal corresponding to "OFF-ON" will trigger the MCU to read the stored first state information, and restore the previous light output state based on the first state information.

[0138] In summary, in the embodiment of the present application, the endoscope light source device includes an MCU, a dimming assembly, a timing circuit, a light emitting circuit, and a power supply. In the case of short-time power failure (i.e. the power failure time does not exceed the power failure time threshold) and power recovery of the power supply, the MCU can read the stored first state information based on the timing signal of the timing circuit, and control the light emitting circuit to emit the light beam of the first state based on the first state information through the first control signal again, i.e. restore the previous light output state adjusted by the user operation, without the need for medical personnel to manually adjust the equipment again, thereby not delaying the inspection, diagnosis, or operation progress of the medical personnel.

[0139] All the optional technical solutions described above can be combined to form optional embodiments of the present application, and the embodiments of the present application will not be repeated here.

[0140] In some embodiments, a computer readable storage medium is also provided, and the storage medium stores a computer program which, when executed by a processor, implements the steps of the light emitting control method in the above embodiments. For example, the computer readable storage medium can be a ROM (Read-Only Memory), a RAM (Random Access Memory), a CD-ROM (Compact Disc Read-Only Memory), a magnetic tape, a floppy disk, an optical data storage device, etc.

[0141] It is worth noting that the computer readable storage medium mentioned in the embodiments of the present application can be a non-volatile storage medium, in other words, a non-transitory storage medium.

[0142] It should be understood that all or part of the steps of the above-mentioned embodiments can be realized by software, hardware, firmware or any combination thereof. When realized by software, it can be realized in the form of a computer program product in whole or in part. The computer program product includes one or more computer instructions. The computer instructions can be stored in the computer readable storage medium described above.

[0143] That is, in some embodiments, a computer program product including instructions which, when executed on a computer, cause the computer to perform the steps of the method described above is also provided.

[0144] It should be understood that "at least one" referred to herein means one or more, and "multiple" means two or more. In the description of the embodiments of the present application, unless otherwise specified, " / " represents the meaning of or, for example, A / B can represent A or B; "and / or" herein is only a description of the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, in order to clearly describe the technical solutions of the embodiments of the present application, in the embodiments of the present application, the same items or similar items with basically the same functions and effects are distinguished by using "first", "second" and the like. The skilled in the art can understand that "first", "second" and the like do not limit the quantity and execution order, and "first", "second" and the like do not necessarily mean different.

[0145] It should be noted that the information (including but not limited to user device information, user personal information, etc.), data (including but not limited to data for analysis, stored data, displayed data, etc.) and signals involved in the embodiments of the present application are all authorized by the user or fully authorized by all parties, and the collection, use and processing of related data need to comply with relevant laws, regulations and standards of relevant countries and regions.

[0146] The above describes the embodiments provided by the present application, and does not limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. An endoscope light source device characterized by comprising: The endoscope light source device comprises a micro control unit (MCU), a light adjusting assembly, a timing circuit, a light emitting circuit and a power supply; The MCU is electrically connected with the light adjusting assembly, the timing circuit, the light emitting circuit and the power supply respectively, and the light adjusting assembly, the timing circuit and the light emitting circuit are also electrically connected with the power supply respectively; The MCU is configured to store the first state information when the first state information is received, and output a first control signal to the light emitting circuit based on the first state information, the first control signal being used to control the light emitting circuit to emit a light beam of a first state among multiple states, the first state information being determined by the light adjusting assembly according to a detected user operation; The MCU is further configured to, in the case of power-off and re-power-on of the power supply, acquire a timing signal of the timing circuit, read the first state information if a power-off duration indicated by the timing signal does not exceed a power-off time threshold, and output the first control signal to the light emitting circuit based on the first state information again.

2. The endoscope light source apparatus according to claim 1, characterized by The timing signal is a level signal, if the timing signal is a first level signal, the power-off duration indicated by the timing signal does not exceed the power-off time threshold; if the timing signal is a second level signal, the power-off duration indicated by the timing signal exceeds the power-off time threshold.

3. The endoscope light source apparatus according to claim 2, characterized by The timing circuit comprises a timer having a key (KEY) pin and an output (OUT) pin, and the power supply has a first power supply end, the KEY pin is electrically connected with the first power supply end, and the OUT pin is electrically connected with the MCU; In the case of power-off of the power supply, the power supply causes the KEY pin of the timing circuit to generate and output a power-off signal to the OUT pin through the first power supply end, and the OUT pin generates the first level signal under the triggering of the power-off signal; The timer starts timing at the moment when the OUT pin generates the first level signal, and continuously outputs the first level signal through the OUT pin before the timing ends, and the duration between the timing start moment and the timing end moment of the timer is equal to the power-off time threshold.

4. The endoscope light source apparatus according to claim 3, characterized by The timing circuit further comprises a power supply capacitor, and the power supply further has a second power supply end, one end of the power supply capacitor is electrically connected with the second power supply end, and the other end is grounded; The timer further has a voltage input (VIN) pin and a ground (GND) pin, the VIN pin is electrically connected with the second power supply end, and the GND pin is grounded; The power supply supplies power to the timer through the second power supply end in the case of no power-off, and charges the power supply capacitor, and the power supply capacitor supplies power to the timer in the case of power-off of the power supply.

5. The endoscope light source apparatus according to claim 4, characterized by The power supply further has a third power supply end, the third power supply end is electrically connected with the MCU, and the power supply supplies power to the MCU through the third power supply end; The endoscope light source device further comprises a power supply cutoff circuit, one end of the power supply cutoff circuit is electrically connected with the third power supply end, and the other end is grounded; the power supply cutoff circuit comprises a diode, a voltage dropping resistor and a voltage dropping capacitor connected in series, and the positive electrode of the diode is electrically connected with the third power supply end; one end of the power supply capacitor not grounded is electrically connected between the voltage dropping resistor and the voltage dropping capacitor; The power supply cutoff circuit blocks the power supply capacitor from supplying power to the MCU in the case of power failure of the power supply.

6. The endoscope light source apparatus according to any one of claims 3 to 5, characterized by The endoscope light source device further comprises a first voltage dividing circuit, one end of the first voltage dividing circuit is electrically connected with the first power supply end, and the other end is grounded; the first voltage dividing circuit comprises a first voltage dividing resistor and a second voltage dividing resistor connected in series, and the KEY pin is electrically connected between the first voltage dividing resistor and the second voltage dividing resistor; The MCU has a first pin and a second pin, the first pin is electrically connected between the first voltage dividing resistor and the second voltage dividing resistor, and the second pin is electrically connected with the OUT pin.

7. The endoscope light source apparatus according to claim 6, characterized by The endoscope light source device further comprises a first level inversion circuit, the KEY pin is electrically connected between the first voltage dividing resistor and the second voltage dividing resistor through the first level inversion circuit; and / or, The endoscope light source device further comprises a second level inversion circuit, the OUT pin is electrically connected with the second pin of the MCU through the second level inversion circuit.

8. The endoscope light source device of claim 1, wherein The timing signal is a clock signal containing the current power failure time, and if the time difference between the power-on time of the MCU and the current power failure time does not exceed the power failure time threshold, the power failure time indicated by the timing signal does not exceed the power failure time threshold.

9. An endoscope system characterized by comprising: The endoscope system comprises a light source device and an imaging device, and the light source device comprises the device according to any one of claims 1-8.

10. A light emission control method characterized by, The method is applied to a micro control unit (MCU) included in an endoscope light source device, the endoscope light source device further comprises a light adjusting component, a timing circuit, a light emitting circuit and a power supply, the light emitting circuit can emit light beams in multiple states; the method comprises: Receiving and storing first state information, the first state information is determined by the light adjusting component according to the detected user operation; Outputting a first control signal to the light emitting circuit based on the first state information to control the light emitting circuit to emit light beams in a first state, the first state being one of the multiple states; In the case of power failure and power-on of the power supply, obtaining a timing signal of the timing circuit; If the power failure time indicated by the timing signal does not exceed the power failure time threshold, reading the first state information and outputting the first control signal to the light emitting circuit based on the first state information again.

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