Light source control circuit and endoscope illumination system

Abstract

The utility model provides a light source control circuit and an endoscope lighting system, relates to the technical field of circuits, is applied to the endoscope lighting system, and comprises a control unit, a plurality of driving units and a plurality of light source units, an interface of the control unit is respectively connected with the plurality of driving units, the plurality of driving units are connected with driving ends of the plurality of light source units, and the number of the driving units is the same as that of the light source units; the plurality of driving units comprise at least one first driving unit and at least one second driving unit, and the maximum driving current of the first driving unit is different from the maximum driving current of the second driving unit; the driving end of each light source unit is connected with one first driving unit or one second driving unit. The high-precision dimming function can be achieved, the light source utilization efficiency of the light source control circuit is improved, and the reliability of the sight glass lighting system is improved.

Description

Technical Field

[0001] This application relates to the field of circuit technology, and in particular to a light source control circuit and an endoscope illumination system. Background Technology

[0002] With the continuous development of medical technology, endoscopic lighting systems have been widely used in medical diagnosis and treatment. There are two main types of light sources: xenon lamps and LEDs. While xenon lamps were once commonly used, their short lifespan has led to drawbacks such as high maintenance costs and inconvenience in long-term practice. In contrast, LED light sources, with their advantages of long lifespan, low power consumption, and high stability, have become the mainstream choice for endoscopic lighting systems.

[0003] Existing endoscopic illumination systems employ multiple light source units to meet high brightness requirements; however, these units are all driven by the same driver unit. Because different light source units require different driving currents, a unified driver unit cannot adapt to the current requirements of each unit, resulting in illumination brightness failing to reach ideal levels. This directly leads to a decline in the image quality acquired by the imaging module of the endoscopic illumination system, making it impossible to clearly display lesion information in the area to be observed, causing numerous inconveniences and obstacles for doctors in accurate diagnosis and effective treatment. Utility Model Content

[0004] The purpose of this application is to provide a light source control circuit and an endoscope illumination system to alleviate (reduce, lower, etc.) the technical problem in the prior art where different light source units require different driving currents, and a unified driving unit is difficult to adapt to the current requirements of each unit, resulting in the illumination brightness being difficult to reach the ideal level.

[0005] To achieve the above objectives, the technical solutions adopted in the embodiments of this application are as follows:

[0006] In a first aspect, embodiments of this application provide a light source control circuit applied to an endoscope illumination system. The light source control circuit includes: a control unit, multiple drive units, and multiple light source units. The interface of the control unit is connected to the multiple drive units, and the multiple drive units are connected to the drive terminals of the multiple light source units. The number of drive units is the same as the number of light source units.

[0007] The plurality of driving units include at least one first driving unit and at least one second driving unit, wherein the maximum driving current of the first driving unit is different from the maximum driving current of the second driving unit; the driving end of each of the light source units is connected to one of the first driving units or one of the second driving units.

[0008] Optionally, the number of the plurality of light source units is at least three, and the types of the plurality of light source units include at least: red light source unit, green light source unit and blue light source unit.

[0009] Optionally, the light source control circuit further includes: multiple temperature sensors;

[0010] The multiple temperature sensors are respectively disposed at corresponding positions of the multiple light source units, and the multiple temperature sensors are respectively connected to multiple analog-to-digital conversion interfaces of the control unit.

[0011] Optionally, the light source control circuit further includes a buzzer, which is connected to the input / output interface of the control unit.

[0012] Optionally, the light source control circuit further includes: a first communication unit and a second communication unit; the asynchronous serial communication interface of the control unit is connected to the first communication unit and the second communication unit respectively, the first communication unit is used to connect to the dimming interface of the preset debugging device, and the second communication unit is used to connect to the serial communication interface of the image processor.

[0013] Optionally, the light source control circuit further includes: a light sensor; the light sensor is disposed on a preset last light-emitting surface, and the light sensor is connected to the first integrated circuit bus interface of the control unit.

[0014] Optionally, the light source control circuit further includes a clock unit; wherein the clock unit is connected to the second integrated circuit bus interface of the control unit.

[0015] Optionally, the light source control circuit further includes a storage unit; the storage unit is also connected to the second integrated circuit bus interface of the control unit.

[0016] Optionally, the light source control circuit further includes: multiple heat dissipation units and / or air pump units; the multiple heat dissipation units are respectively connected to multiple pulse output interfaces of the control unit; the air pump unit is connected to the digital-to-analog conversion interface of the control unit.

[0017] Secondly, embodiments of this application provide an endoscope illumination system, comprising at least: a light source control circuit as described in any of the first aspects above and a power supply module; the power supply module is connected to the power supply terminals of multiple light source units in the light source control circuit.

[0018] Compared with the prior art, the beneficial effects of the light source control circuit and endoscope illumination system provided in this application are:

[0019] This application provides a light source control circuit and an endoscope illumination system, relating to the field of circuit technology and applied to an endoscope illumination system. The light source control circuit can be composed of a control unit, multiple drive units, and multiple light source units. The interface of the control unit is connected to multiple drive units, and the multiple drive units are connected to the drive terminals of multiple light source units. The number of drive units is the same as the number of light source units. The multiple drive units can be composed of at least one first drive unit and at least one second drive unit. The maximum drive current of the first drive unit is different from the maximum drive current of the second drive unit. The drive terminal of each light source unit is connected to one first drive unit or one second drive unit. Therefore, this application, by equipping different types of light source units with dedicated drive units (such as a first drive unit and a second drive unit), fully considers the different requirements of different light source units for drive current, thereby ensuring that each light source unit can obtain appropriate drive power. This avoids the problem that a unified drive unit cannot adapt to the current requirements of each unit due to the difference in drive current required by different light source units, ultimately leading to unsatisfactory lighting brightness. Furthermore, each drive unit is connected to the interface of the control unit to achieve independent and precise control of each light source unit. By using the multi-channel PWM wave generated by the interface of the control unit to drive each light source unit, a high-precision dimming function is achieved, improving the light source utilization efficiency of the light source control circuit and increasing the stability and reliability of the endoscopic lighting system. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of an endoscope illumination system provided in an embodiment of this application;

[0022] Figure 2 A schematic diagram of a light source control circuit provided in an embodiment of this application. Figure 1 ;

[0023] Figure 3 A schematic diagram of a light source control circuit provided in an embodiment of this application. Figure 2 ;

[0024] Figure 4 A schematic diagram of a light source control circuit provided in an embodiment of this application. Figure 3 ;

[0025] Figure 5A schematic diagram of a light source control circuit provided in an embodiment of this application. Figure 4 ;

[0026] Figure 6 A schematic diagram of a light source control circuit provided in an embodiment of this application. Figure 5 ;

[0027] Figure 7 A schematic diagram of a light source control circuit provided in an embodiment of this application. Figure 6 ;

[0028] Figure 8 A schematic diagram of a light source control circuit provided in an embodiment of this application. Figure 7 ;

[0029] Figure 9 A schematic diagram of a light source control circuit provided in an embodiment of this application. Figure 8 ;

[0030] Figure 10 A schematic diagram of a light source control circuit provided in an embodiment of this application. Figure 9 . Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0032] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0033] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0034] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0035] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0036] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0037] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0038] To better understand the solutions provided in the embodiments of this application, the following detailed description of a light source control circuit and an endoscope illumination system provided in the embodiments of this application will be provided in conjunction with the accompanying drawings.

[0039] Figure 1 This is a schematic diagram of an endoscope illumination system provided in an embodiment of this application. Figure 1 As shown, the endoscope illumination system 200 may include at least: a light source control circuit 100 and a power supply module 210.

[0040] The power supply module 210 is connected to the power supply terminals of multiple light source units in the light source control circuit 100, and is used to supply electrical energy to the multiple light source units in the light source control circuit 100.

[0041] The endoscope illumination system provided in this application may consist of at least a light source control circuit and a power supply module; the power supply module is connected to the power supply terminals of multiple light source units in the light source control circuit to supply power to the multiple light source units in the light source control circuit, so as to ensure that the illumination function in the entire light source control circuit can be realized stably and efficiently.

[0042] Furthermore, the light source control circuit 100 provided in the embodiments of this application will be further described below with reference to the accompanying drawings. Figure 2 A schematic diagram of a light source control circuit provided in an embodiment of this application. Figure 1 .like Figure 2 As shown, the light source control circuit 100 is applied to an endoscope illumination system. The light source control circuit 100 may include: a control unit 110, multiple drive units 120 and multiple light source units 130.

[0043] The control unit 110 has an interface HRTIMI_CH (high-resolution timer interface) that is connected to multiple drive units 120 to generate multiple PWM (Pulse Width Modulation) waves. These PWM waves are then used to control the drive units 120. The multiple drive units 120 are connected to the drive terminals of multiple light source units 130 to provide drive signals to the light source units 130. The number of drive units is the same as the number of light source units, so that each drive unit 120 is connected to the drive terminal of one light source unit 130. This allows each light source unit 130 to be controlled independently. According to the observation needs of different parts of the endoscopic illumination system, the brightness or on / off state of a specific light source unit 130 can be adjusted by controlling the corresponding drive unit 120. This enables flexible adjustment of the light path and illumination effect, improves the uniformity and contrast of illumination, and enhances the highlighting effect of lesions, providing clearer and more accurate image information for medical diagnosis.

[0044] The control unit 110 can be selected according to the actual situation.

[0045] The plurality of driving units 120 may include at least one first driving unit and at least one second driving unit; wherein the first driving unit and the second driving unit can be selected according to actual conditions; in addition, the maximum driving current of the first driving unit and the second driving unit can be selected according to actual conditions, for example, the maximum driving current of the first driving unit can be selected as 20A; the maximum driving current of the second driving unit can be selected as 15A.

[0046] The maximum driving current of the first driving unit (e.g., 20A) is different from that of the second driving unit (e.g., 15A), and the driving terminal of each light source unit is connected to either a first driving unit or a second driving unit, so that the first driving unit and the second driving unit can be adapted to the needs of light sources with different power.

[0047] In one possible implementation, the first driving unit (such as the LT3743 chip) has a constant current maximum of 20A and a pulse current maximum of 40A, allowing for PWM dimming with a ratio of 3000:1; the second driving unit (such as the LT3763 chip) also has a constant current maximum of 20A and can use PWM dimming with a ratio of 3000:1. Furthermore, it should be noted that if one of the light source units has a constant current maximum drive current of 20A and a maximum current of 25A under pulse current (e.g., duty cycle below 50%), meaning that in practical applications the light source brightness typically does not need to be adjusted to maximum, then the first driving unit (such as the LT3743 chip) can be selected for connection. If the light source unit achieves maximum brightness with a constant current drive current of 10A, then the second driving unit (such as the LT3743 chip) can be selected for connection.

[0048] This application provides a light source control circuit for use in an endoscope illumination system. The light source control circuit may consist of a control unit, multiple drive units, and multiple light source units. The interface of the control unit is connected to multiple drive units, and the multiple drive units are connected to the drive terminals of multiple light source units. The number of drive units is the same as the number of light source units. The multiple drive units may consist of at least one first drive unit and at least one second drive unit. The maximum drive current of the first drive unit is different from the maximum drive current of the second drive unit. The drive terminal of each light source unit is connected to one first drive unit or one second drive unit. Therefore, this application, by equipping different types of light source units with dedicated drive units (such as a first drive unit and a second drive unit), fully considers the different requirements of different light source units for drive current, thereby ensuring that each light source unit can obtain appropriate drive power. This avoids the problem that a unified drive unit cannot adapt to the current requirements of each unit due to the difference in drive current required by different light source units, ultimately leading to unsatisfactory lighting brightness. Furthermore, each drive unit is connected to the interface of the control unit to achieve independent and precise control of each light source unit. By using the multi-channel PWM wave generated by the interface of the control unit to drive each light source unit, a high-precision dimming function is achieved, improving the light source utilization efficiency of the light source control circuit and increasing the stability and reliability of the endoscopic lighting system.

[0049] Optionally, the number of multiple light source units 130 is at least three, and the types of these multiple light source units 130 include at least: a red light source unit, a green light source unit, and a blue light source unit. The brightness of the three light source units (red, green, and blue) is mixed according to a preset ratio to form white light. The preset mixing ratio can be selected according to actual conditions.

[0050] Furthermore, the three light source units can be connected to a first driving unit (such as an LT3743 chip) or a second driving unit (such as an LT3743 chip) through their respective driving terminals.

[0051] It should be noted that the number of multiple light source units mentioned above is for illustrative purposes only and should not be construed as a limitation of this application. For example, the number of multiple light source units 130 could also be five, and the types of multiple light source units 130 could include at least: a red light source unit, a green light source unit, a blue light source unit, an ultraviolet light source unit, and an amber light source unit. The ultraviolet light source unit can be selected as a UV (Ultra-Violet Ray) lamp. It is understood that the number and type of light source units 130 can be selected according to actual circumstances.

[0052] The light source control circuit provided in this application has at least three light source units, including red, green, and blue light source units. This greatly expands the color range achievable by this application. It also allows the light source control circuit to be flexibly adjusted under different usage environments and requirements, improving its adaptability.

[0053] The light source control circuit 100 provided in the embodiments of this application will be further described below with reference to the accompanying drawings. Figure 3 A schematic diagram of a light source control circuit provided in an embodiment of this application. Figure 2 .like Figure 3 As shown, the light source control circuit 100 may also include: multiple temperature sensors 141.

[0054] Multiple temperature sensors 141 are respectively disposed at corresponding positions of multiple light source units 130. For example, a temperature sensor 141 is placed at the bottom of the light source unit 130 to collect the temperature of the temperature sensor 141. Multiple temperature sensors 141 are respectively connected to multiple analog-to-digital converter interfaces (ADCs) of the control unit 110 to convert the collected temperature data into digital signals and transmit them to the control unit 110. The control unit 110 compares the collected temperature data with preset temperature data. If the temperature data is greater than the preset temperature data, the temperature of the light source unit 130 corresponding to the temperature sensor 141 is too high. The control unit 110 can limit the current of the light source unit 130 to prevent the lifespan of the light source unit 130 from being affected by excessive temperature.

[0055] The temperature sensor 141 can be selected according to the actual situation. For example, the temperature sensor 141 can be selected as a thermistor NTC (Negative Temperature Coefficient).

[0056] The light source control circuit provided in this application can also be composed of multiple temperature sensors. These temperature sensors are respectively positioned at corresponding locations of multiple light source units to achieve real-time, independent, and accurate monitoring of the operating temperature of each light source unit. Each temperature sensor is connected to multiple analog-to-digital converter interfaces of the control unit to quickly and accurately convert the analog temperature signals collected by the temperature sensors into digital signals, facilitating efficient processing and analysis by the control unit. Therefore, this application optimizes the temperature management of the light source control circuit, improving the safety and stability of the endoscopic illumination system.

[0057] The light source control circuit 100 provided in the embodiments of this application will be further described below with reference to the accompanying drawings. Figure 4 A schematic diagram of a light source control circuit provided in an embodiment of this application. Figure 3 .like Figure 4 As shown, the light source control circuit 100 may further include a buzzer 142.

[0058] The buzzer 142 is connected to the input / output interface (IO) of the control unit 110, and is used to provide an alert when the temperature is too high or too low, or when an abnormality occurs in the endoscope illumination system, or to report abnormal data to the image processor. The image processor can be selected according to the actual situation.

[0059] The light source control circuit provided in this application further includes: the light source control circuit may also be composed of a buzzer, which is connected to the input / output interface of the control unit to provide a reminder when the temperature is too high, or to provide a reminder when an abnormal situation occurs in the endoscope illumination system, or to report abnormal data to a preset image processor, thereby improving the safety and stability of the endoscope illumination system.

[0060] The light source control circuit 100 provided in the embodiments of this application will be further described below with reference to the accompanying drawings. Figure 5 A schematic diagram of a light source control circuit provided in an embodiment of this application. Figure 4 .like Figure 5 As shown, the light source control circuit 100 may further include: a first communication unit 151 and a second communication unit 152.

[0061] The asynchronous serial communication interface (UART) of the control unit 110 is connected to the first communication unit 151 and the second communication unit 152. The first communication unit 151 is used to connect to the dimming interface (such as an RS422 interface) of the preset debugging device, and the second communication unit 152 is used to connect to the serial communication interface (such as an RS232 interface) of the image processor. The preset debugging device can be selected according to the actual situation. For example, the preset debugging device can be a dimming device.

[0062] The first communication unit 151 and the second communication unit 152 can be selected according to the actual situation. For example, the first communication unit 151 can be selected as MAX490 and the second communication unit 152 can be selected as SP322E.

[0063] It should be noted that, in this application, since dimming interfaces (such as RS422 interfaces) have stronger anti-interference capabilities and faster communication speeds compared to serial communication interfaces (such as RS232 interfaces), the asynchronous serial communication interface UART of the control unit 110 can be connected to the dimming interface (such as RS422 interface) through the first communication unit 151 (such as MAX490) to facilitate dimming by preset debugging equipment (such as dimming equipment). Simultaneously, the asynchronous serial communication interface UART of the control unit 110 in this application is also compatible with serial communication interfaces (such as RS232 interfaces) for data debugging with the image processor.

[0064] The light source control circuit provided in this application can also be composed of a first communication unit and a second communication unit. The asynchronous serial communication interface of the control unit is connected to both the first and second communication units. The first communication unit is used to connect to the dimming interface of a preset debugging device, allowing technicians to conveniently remotely set and adjust the dimming parameters of the light source during the development and debugging phase of the endoscopic illumination system. Simultaneously, the first communication unit can be connected to the asynchronous serial communication interface of the control unit to achieve rapid and accurate transmission of control commands and data, and real-time monitoring of the dimming effect, greatly improving debugging efficiency and shortening the product development cycle. The second communication unit is used to connect to the serial communication interface of the image processor, enabling data interaction and collaborative work between illumination control and image processing. Simultaneously, the second communication unit can be connected to the asynchronous serial communication interface of the control unit to dynamically adjust the illumination parameters of the light source based on this information, providing more suitable illumination conditions for image acquisition and processing. Therefore, this application can improve the compatibility and scalability of the endoscopic illumination system.

[0065] The light source control circuit 100 provided in the embodiments of this application will be further described below with reference to the accompanying drawings. Figure 6 A schematic diagram of a light source control circuit provided in an embodiment of this application. Figure 5 .like Figure 6 As shown, the light source control circuit 100 may further include a light sensor 160.

[0066] The light sensor 160 is located on a preset final light-emitting surface, which can be selected according to actual conditions. It should be noted that multiple small holes are provided on the preset final light-emitting surface so that the light emitted by each light source unit 130 can be scattered through these holes, thereby illuminating the light sensor 160.

[0067] The illumination sensor 160 is connected to the first integrated circuit bus interface I2C1 of the control unit 110 to detect the illumination intensity of each light source unit 130 for light decay detection. The illumination sensor 160 can be selected according to actual needs. For example, the illumination sensor 160 can be selected as an AS7341 chip, which has 11 channels for detecting wavelengths from 350nm to 1000nm in the spectrum.

[0068] The light source control circuit provided in this application can also be composed of a light sensor. The light sensor is set on the preset final light-emitting surface to measure the light intensity of the final light-emitting surface in real time and accurately, which helps to evaluate the light uniformity of the entire light-emitting area. The light sensor is connected to the first integrated circuit bus interface of the control unit so that multiple light sensors can measure the light intensity at different locations. The control unit is used to obtain the distribution map of the light intensity of the light-emitting surface, and based on these data, identify areas with weak or strong light, and optimize the light uniformity by adjusting the brightness of the light source units in the corresponding areas, thereby realizing intelligent lighting control.

[0069] The light source control circuit 100 provided in the embodiments of this application will be further described below with reference to the accompanying drawings. Figure 7 A schematic diagram of a light source control circuit provided in an embodiment of this application. Figure 6 .like Figure 7 As shown, the light source control circuit 100 may further include a clock unit 171.

[0070] The clock unit 171 is connected to the second integrated circuit bus interface I2C1 of the control unit 110 to maintain the time synchronization of the light source control circuit when the power is off.

[0071] The clock unit 171 can be selected according to the actual situation. For example, the clock unit 171 can be selected as a DS1337 clock chip.

[0072] The light source control circuit provided in this application may also be composed of a clock unit; wherein, the clock unit is connected to the second integrated circuit bus interface of the control unit to achieve the accuracy of time and data recording, and when the power supply is restored after the light source control circuit is powered off, the time synchronization maintained by the clock unit can enable the control unit to quickly coordinate the work of each part, thereby improving the reliability and stability of the light source control circuit.

[0073] The light source control circuit 100 provided in the embodiments of this application will be further described below with reference to the accompanying drawings. Figure 8 A schematic diagram of a light source control circuit provided in an embodiment of this application. Figure 7 .like Figure 8 As shown, the light source control circuit 100 may further include a storage unit 172.

[0074] The storage unit 172 is also connected to the second integrated circuit bus interface of the control unit 110 via I2C1, which is used to store the usage records of the light source control circuit for subsequent calculations and reminders.

[0075] The storage unit 172 can be selected according to the actual situation. For example, the storage unit 172 can be selected as an EEPROM24C04 chip.

[0076] The light source control circuit provided in this application may also be composed of a storage unit; the storage unit is also connected to the second integrated circuit bus interface of the control unit to comprehensively and meticulously record the working status of the light source control circuit in various time periods and track its usage, thereby improving the reliability and stability of the light source control circuit.

[0077] The light source control circuit 100 provided in the embodiments of this application will be further described below with reference to the accompanying drawings. Figure 9 A schematic diagram of a light source control circuit provided in an embodiment of this application. Figure 7 .like Figure 9 As shown, the light source control circuit 100 may further include: multiple heat dissipation units 181.

[0078] Multiple heat dissipation units 181 are connected to multiple pulse output interfaces (TIM-PWM) of the control unit 110, respectively, to control the opening, closing, and rotation speed of the multiple heat dissipation units 181 according to the PWM output from the multiple pulse output interfaces (TIM-PWM). The heat dissipation unit 181 can be selected according to actual conditions; for example, the heat dissipation unit 181 can be a fan.

[0079] Furthermore, Figure 10 A schematic diagram of a light source control circuit provided in an embodiment of this application. Figure 9 .like Figure 10 As shown, the light source control circuit 100 may further include an air pump unit 182.

[0080] The air pump unit 182 is connected to the digital-to-analog converter (DAC) interface of the control unit 110 and is used to control the speed of the motor of the air pump unit 182.

[0081] The light source control circuit provided in this application may further consist of multiple heat dissipation units and / or an air pump unit. The multiple heat dissipation units are respectively connected to multiple pulse output interfaces of the control unit. These interfaces send pulse signals with different duty cycles to each heat dissipation unit according to different operational requirements and the real-time status of each component, achieving precise heat dissipation control, effectively reducing unnecessary energy consumption, and improving heat dissipation efficiency. The air pump unit is connected to the analog-to-digital converter interface of the control unit. It is used to precisely adjust its own operating state based on the received analog signals, such as adjusting the motor speed and valve opening / closing degree, thereby accurately outputting the required air pressure to meet the specific air pressure requirements of different application scenarios, improving the working efficiency of the light source control circuit, and avoiding energy waste.

[0082] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A light source control circuit, characterized in that, The light source control circuit, used in an endoscope illumination system, includes: a control unit, multiple drive units, and multiple light source units; the interface of the control unit is connected to the multiple drive units respectively, and the multiple drive units are connected to the drive terminals of the multiple light source units; the number of drive units is the same as the number of light source units. The plurality of driving units include at least one first driving unit and at least one second driving unit, wherein the maximum driving current of the first driving unit is different from the maximum driving current of the second driving unit; and the driving terminal of each of the light source units is connected to one of the first driving units or one of the second driving units.

2. The light source control circuit according to claim 1, characterized in that, The number of the plurality of light source units is at least three, and the types of the plurality of light source units include at least: red light source unit, green light source unit and blue light source unit.

3. The light source control circuit according to claim 1, characterized in that, The light source control circuit also includes: multiple temperature sensors; The multiple temperature sensors are respectively disposed at corresponding positions of the multiple light source units, and the multiple temperature sensors are respectively connected to multiple analog-to-digital conversion interfaces of the control unit.

4. The light source control circuit according to claim 3, characterized in that, The light source control circuit also includes a buzzer, which is connected to the input / output interface of the control unit.

5. The light source control circuit according to claim 3, characterized in that, The light source control circuit further includes: a first communication unit and a second communication unit; the asynchronous serial communication interface of the control unit is connected to the first communication unit and the second communication unit respectively, the first communication unit is used to connect to the dimming interface of the preset debugging device, and the second communication unit is used to connect to the serial communication interface of the image processor.

6. The light source control circuit according to claim 1, characterized in that, The light source control circuit further includes: a light sensor; the light sensor is set on a preset last light-emitting surface, and the light sensor is connected to the first integrated circuit bus interface of the control unit.

7. The light source control circuit according to claim 1, characterized in that, The light source control circuit further includes a clock unit; wherein the clock unit is connected to the second integrated circuit bus interface of the control unit.

8. The light source control circuit according to claim 7, characterized in that, The light source control circuit further includes a storage unit; the storage unit is also connected to the second integrated circuit bus interface of the control unit.

9. The light source control circuit according to claim 1, characterized in that, The light source control circuit further includes: multiple heat dissipation units and / or air pump units; the multiple heat dissipation units are respectively connected to multiple pulse output interfaces of the control unit; the air pump unit is connected to the digital-to-analog conversion interface of the control unit.

10. An endoscope illumination system, characterized in that, It includes at least: the light source control circuit and the power supply module as described in any one of claims 1 to 9; the power supply module is connected to the power supply terminals of the plurality of light source units in the light source control circuit.

Images