Endoscope interface board, host and endoscope

Abstract

The utility model relates to the technical field of endoscopes, and discloses an endoscope interface board, a host and an endoscope, the endoscope interface board comprises a first data line pin part, a second data line pin part, a first control line pin part, a second control line pin part, a first power line pin part and a second power line pin part; every two corresponding pin parts are connected and are configured to be connected with corresponding signal lines. According to the utility model, the pins of the data line, the control line and the power line are backed up, so that data signals, control signals or power supply signals can still be transmitted through redundant pins when problems such as poor contact of a part of the pins occur, and the reliability of the transmission process can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of endoscopes, in particular to an endoscope interface board, a host and an endoscope. Background Art

[0002] When transmitting image signals, endoscopes in related technologies usually need to use a variety of cables for transmitting signals, including data cables, power cables, control cables, etc. When one of these cables for transmitting signals has a problem, it often causes an abnormality in the image output end of the endoscope, such as a black screen, etc., resulting in low reliability of the endoscope. Utility Model Content

[0003] In view of this, the utility model provides an endoscope interface board, a host and an endoscope to solve the problem of low reliability of the endoscope.

[0004] In a first aspect, the utility model provides an endoscope interface board, comprising: a first data line pin portion, a second data line pin portion, a first control line pin portion, a second control line pin portion, a first power line pin portion, and a second power line pin portion;

[0005] The first data line pin portion and the second data line pin portion are both used to transmit data signals; the first data line pin portion is connected to the second data line pin portion and is configured to be connected to a data line;

[0006] The first control line pin portion and the second control line pin portion are both used to transmit a control signal; the first control line pin portion is connected to the second control line pin portion and is configured to be connected to a control line;

[0007] The first power line pin portion and the second power line pin portion are both used to transmit power signals; the first power line pin portion is connected to the second power line pin portion and is configured to be connected to a power line.

[0008] In some embodiments, the number of the first control line pin portion and the number of the second control line pin portion are both m; m≥2;

[0009] One of the first control line pin portions is connected to a corresponding second control line pin portion and is configured to be connected to a serial data line;

[0010] Another of the first control line pin portions is connected to the corresponding second control line pin portion and is configured to be connected to the serial clock line.

[0011] In some embodiments, the number of the first power line pin portion and the number of the second power line pin portion are both n; n≥2;

[0012] Each of the first power line pin portions is connected to a corresponding second power line pin portion and is respectively configured to be connected to power lines with different voltage levels.

[0013] In a second aspect, the utility model provides a host, comprising: the endoscope interface board of the first aspect or any corresponding embodiment thereof, and further comprising a power supply circuit and a processor;

[0014] The first data line pin portion and the second data line pin portion of the endoscope interface board are connected to one end of the data line, and the other end of the data line is connected to the processor;

[0015] The first control line pin portion and the second control line pin portion of the endoscope interface board are connected to one end of the control line, and the other end of the control line is connected to the processor;

[0016] The first power line pin portion and the second power line pin portion of the endoscope interface board are connected to one end of the power line, and the other end of the power line is connected to the power circuit.

[0017] In some embodiments, the power supply circuit includes a first level conversion circuit and a second level conversion circuit;

[0018] The input ends of the first level conversion circuit and the second level conversion circuit are used to access a power supply;

[0019] The other end of the power line is connected to the output ends of the first level conversion circuit and the second level conversion circuit.

[0020] In some embodiments, the power circuit further includes a first diode and a second diode;

[0021] The anode of the first diode is connected to the output end of the first level conversion circuit, and the cathode of the first diode is connected to the power line;

[0022] An anode of the second diode is connected to the output end of the second level conversion circuit, and a cathode of the second diode is connected to the power line.

[0023] In some embodiments, both the first diode and the second diode are zener diodes.

[0024] In some embodiments, the number of the first power line pin portions and the number of the second power line pin portions are both n, and the power circuit includes n groups of first level conversion circuits and second level conversion circuits;

[0025] Different groups of the first level conversion circuits and the second level conversion circuits are used to output voltages of different voltage levels, and different groups of the first level conversion circuits and the second level conversion circuits are connected to power lines of different voltage levels.

[0026] In some implementations, both the first level conversion circuit and the second level conversion circuit are low dropout linear regulators.

[0027] In a third aspect, the utility model provides an endoscope, comprising: a host according to the second aspect or any corresponding embodiment thereof, and also comprising an image acquisition device;

[0028] The image acquisition device comprises the endoscope interface board of the first aspect or any corresponding embodiment thereof, and the endoscope interface board of the image acquisition device is connected to the endoscope interface board of the host.

[0029] The endoscope interface board provided by the utility model has backed up the pins of the data line, control line and power line, so that when some of the pins have problems such as poor contact, data signals, control signals or power signals can still be transmitted through redundant pins, thereby improving the reliability of the transmission process.

[0030] In addition, the backup pins are connected, so there is no need to increase the number of data lines, control lines and power lines, which helps to ensure the miniaturization of the endoscope. The power circuit in the host is provided with a first level conversion circuit and a second level conversion circuit in parallel, which can convert the corresponding input voltage into a voltage of the same voltage level, so that the first power line pin part and the second power line pin part connected to the power line can both provide the voltage of the voltage level to the outside. In addition, the dual-level conversion circuit power supply method is adopted. When one of the level conversion circuits has a problem, the other level conversion circuit can still realize the level conversion, that is, the power circuit can continue to supply power, thereby improving the reliability of power supply. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the related technologies, the drawings required for use in the specific implementation methods or the related technical descriptions will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0032] Figure 1 It is a structural schematic diagram of an endoscope interface board according to an embodiment of the utility model;

[0033] Figure 2is another structural schematic diagram of an endoscope interface board according to an embodiment of the utility model;

[0034] Figure 3 It is a structural schematic diagram of a host according to an embodiment of the utility model;

[0035] Figure 4 It is a structural schematic diagram of a power supply circuit according to an embodiment of the utility model;

[0036] Figure 5 is another structural schematic diagram of a power supply circuit according to an embodiment of the utility model;

[0037] Figure 6 It is a structural schematic diagram of an endoscope according to an embodiment of the utility model.

[0038] Description of reference numerals:

[0039] 100, endoscope interface board; 101, first data line pin portion; 102, second data line pin portion; 103, data line; 111, first control line pin portion; 112, second control line pin portion; 113, control line; 121, first power line pin portion; 122, second power line pin portion; 123, power line; 200, power supply circuit; 201, first level conversion circuit; 202, second level conversion circuit; D1, first diode; D2, second diode; 300, processor; 1, image acquisition device; 2, host; 3, monitor. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0041] In the description of the present invention, it should be noted that the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0043] When the endoscope transmits images, the corresponding video images are generally collected by the image acquisition device at the front end, and the collected video images are sent to the host through the data line to be displayed to the user; and the host can also send control instructions to the image acquisition device through the control line, and power the image acquisition device through the power line. When any signal line among the data line, power line, and control line has problems (such as aging, poor contact, etc.), it will cause problems in image transmission.

[0044] An endoscope interface board provided in an embodiment of the utility model is used to realize the connection between an image acquisition device and a host; the endoscope interface board backs up the pins, thereby improving the reliability of the interface board and ensuring reliable transmission between the image acquisition device and the host.

[0045] The utility model embodiment provides an endoscope interface board, see Figure 1 As shown, the endoscope interface board 100 includes: a first data line pin portion 101, a second data line pin portion 102, a first control line pin portion 111, a second control line pin portion 112, a first power line pin portion 121 and a second power line pin portion 122.

[0046] The first data line pin portion 101 and the second data line pin portion 102 are both used to transmit data signals; the first data line pin portion 101 is connected to the second data line pin portion 102 and is configured to be connected to the data line 103 .

[0047] The first control line pin portion 111 and the second control line pin portion 112 are both used to transmit control signals; the first control line pin portion 111 is connected to the second control line pin portion 112 and is configured to be connected to a control line 113 .

[0048] The first power line pin portion 121 and the second power line pin portion 122 are both used to transmit power signals; the first power line pin portion 121 is connected to the second power line pin portion 122 and is configured to be connected to a power line 123 .

[0049] In this embodiment, the endoscope interface board 100 is provided with a pin portion for connecting the data line 103, that is, the data line pin portion, based on which the data signal is transmitted, for example, the image acquired by the image acquisition device is transmitted; and the data line pin portion is backed up, that is, the endoscope interface board 100 is provided with a first data line pin portion 101 and a second data line pin portion 102. Among them, the first data line pin portion 101 and the second data line pin portion 102 are both provided with all the pins required for transmitting the data signal, that is, any one of the two can transmit the data signal; when one of the first data line pin portion 101 and the second data line pin portion 102 fails (for example, poor contact), the other can still transmit the data signal normally. In addition, the first data line pin portion 101 is connected to the second data line pin portion 102, that is, the two can be connected to the same data line 103, so that the number of data lines can be kept constant.

[0050] The endoscope interface board 100 is provided with a pin part for connecting the control line 113, that is, the control line pin part, based on which the control signal is transmitted; and the control line pin part is backed up, that is, the endoscope interface board 100 is provided with a first control line pin part 111 and a second control line pin part 112. Among them, the first control line pin part 111 and the second control line pin part 112 are both provided with all the pins required for transmitting the control signal, that is, either of the two can transmit the control signal; when one of the first control line pin part 111 and the second control line pin part 112 fails (for example, poor contact), the other can still transmit the control signal normally. In addition, the first control line pin part 111 is connected to the second control line pin part 112, that is, the two can be connected to the same control line 113, so that the number of control lines can be kept constant.

[0051] The endoscope interface board 100 is provided with a pin portion for connecting the power line 123, that is, the power line pin portion, based on which the power signal is transmitted, specifically, the host supplies power to the image acquisition device based on the power line pin portion; and the power line pin portion is backed up, that is, the endoscope interface board 100 is provided with a first power line pin portion 121 and a second power line pin portion 122. Among them, the first power line pin portion 121 and the second power line pin portion 122 are both provided with all the pins required for transmitting the power signal, that is, either of the two can transmit the power signal; when one of the first power line pin portion 121 and the second power line pin portion 122 fails (for example, poor contact), the other can still transmit the power signal normally. In addition, the first power line pin portion 121 is connected to the second power line pin portion 122, that is, the two can be connected to the same power line 123, so that the number of power lines 123 does not need to be increased.

[0052] It is understandable that each pin portion may include one pin or multiple pins, depending on the actual situation; the pin may be, for example, a pogo pin. For example, if the data line is a SLVS (Serial Link Voltage Standard) line capable of transmitting video signals, such as SLVS-200, two pins are required to achieve data transmission; that is, the first data line pin portion 101 and the second data line pin portion 102 each include two pins.

[0053] It can be understood that the control line 113 can also be used to transmit differential signals, so two pins are required to transmit the control signal, that is, the first control line pin portion 111 and the second control line pin portion 112 each include two pins. The power line 123 needs to use two pins to transmit the power signal, so the first power line pin portion 121 and the second power line pin portion 122 also include two pins.

[0054] In some embodiments, multiple control lines are required between the image acquisition device and the host to achieve control, and the endoscope interface board 100 is also provided with multiple first control line pins 111 and second control line pins 112, that is, the number of first control line pins 111 and second control line pins 112 is m; m≥2.

[0055] The image acquisition device and the host generally transmit control signals via the serial data line (SDA) and serial clock line (SCL) of the I2C bus. Figure 2 As shown, in the endoscope interface board 100, one of the first control line pins 111 is connected to the corresponding second control line pin 112, and is configured to be connected to the serial data line 113a; the other first control line pin 111 is connected to the corresponding second control line pin 112, and is configured to be connected to the serial clock line 113b. At this time, m=2. The serial data line 113a and the serial clock line 113b are both a type of control line 113.

[0056] In some embodiments, since the image acquisition device requires multiple voltages when working, such as 2.8V, 1.8V, 1.2V and other different voltages, the host needs to provide multiple voltages for the image acquisition device accordingly. At this time, the endoscope interface board 100 includes a plurality of first power line pins 121 and second power line pins 122, that is, the number of first power line pins 121 and second power line pins 122 is n; n≥2. Each first power line pin 121 is connected to the corresponding second power line pin 122, and is respectively configured to be connected to power lines 123 with different voltage levels.

[0057] like Figure 2As shown, the endoscope interface board 100 includes three groups of first power line pin portions 121 and second power line pin portions 122, that is, n=3; one group of the first power line pin portions 121 and the second power line pin portions 122 are connected to each other and are connected to the 2.8V power line 123a; the second group of the first power line pin portions 121 and the second power line pin portions 122 are connected to each other and are connected to the 1.8V power line 123b; the third group of the first power line pin portions 121 and the second power line pin portions 122 are connected to each other and are connected to the 1.2V power line 123c.

[0058] The endoscope interface board provided in this embodiment has backup pins for the data line, control line and power line, so that when some of the pins have problems such as poor contact, the data signal, control signal or power signal can still be transmitted through the redundant pins, thereby improving the reliability of the transmission process. In addition, the backup pins are connected, so there is no need to increase the number of data lines, control lines and power lines, which helps to ensure the miniaturization of the endoscope.

[0059] The present utility model also provides a host, such as Figure 3 As shown, the host includes the above-mentioned endoscope interface board 100, and also includes a power supply circuit 200 and a processor 300.

[0060] like Figure 3 As shown, the first data line pin portion 101 and the second data line pin portion 102 of the endoscope interface board 100 are connected to one end of the data line 103, and the other end of the data line 103 is connected to the processor 300; the first control line pin portion 111 and the second control line pin portion 112 of the endoscope interface board 100 are connected to one end of the control line 113, and the other end of the control line 113 is connected to the processor 300; the first power line pin portion 121 and the second power line pin portion 122 of the endoscope interface board 100 are connected to one end of the power line 123, and the other end of the power line 123 is connected to the power circuit 200.

[0061] In this embodiment, the processor 300 is provided with corresponding IO ports, and its data line 103 and control line 113 can be connected to different IO ports to receive data signals or output control signals. Specifically, the processor 300 can be FPGA or the like.

[0062] The power supply circuit 200 is used to output the voltage required by the image acquisition device. For example, the power supply circuit 200 has a level conversion function, which can convert the input voltage (for example, 3.3V) into the voltage required by the image acquisition device (for example, 2.8V, 1.8V, 1.2V, etc.).

[0063] The host of the endoscope provided in this embodiment can be connected to the image acquisition device based on the endoscope interface board 100 with pin backup, so that when one of the pin parts has poor contact, transmission can still be achieved based on the other backup pin part, thereby ensuring the reliability of transmission between the two.

[0064] In some implementations, the power supply circuit 200 can implement dual-circuit power supply to ensure power supply reliability. Figure 4 As shown, the power supply circuit 200 includes a first level conversion circuit 201 and a second level conversion circuit 202; the first level conversion circuit 201 and the second level conversion circuit 202 can output voltages of the same voltage level. For example, the first level conversion circuit 201 and the second level conversion circuit 202 are both low dropout linear regulators (LDO).

[0065] The input ends of the first level conversion circuit 201 and the second level conversion circuit 202 are used to access the power supply; the other end of the power line 123 is connected to the output ends of the first level conversion circuit 201 and the second level conversion circuit 202 .

[0066] In this embodiment, the first level conversion circuit 201 and the second level conversion circuit 202 are arranged in parallel to convert the corresponding input voltage into a voltage of the same voltage level, so that the first power line pin portion 121 and the second power line pin portion 122 connected to the power line 123 can both provide the voltage of the voltage level to the outside. In addition, by adopting the dual-level conversion circuit power supply mode, when one of the level conversion circuits has a problem, the other level conversion circuit can still achieve level conversion, that is, the power supply circuit 200 can continue to supply power, thereby improving the reliability of power supply.

[0067] In some embodiments, Figure 4 As shown, the power supply circuit 200 further includes a first diode D1 and a second diode D2; the anode of the first diode D1 is connected to the output end of the first level conversion circuit 201, and the cathode of the first diode D1 is connected to the power line 123; the anode of the second diode D2 is connected to the output end of the second level conversion circuit 202, and the cathode of the second diode D2 is connected to the power line 123. It can be understood that the anodes of the first diode D1 and the second diode D2 are respectively connected to the corresponding level conversion circuits, the cathodes of the first diode D1 and the second diode D2 are connected to the power line 123. Among them, the first diode D1 and the second diode D2 can both be voltage stabilizing diodes to improve the stability of the output voltage.

[0068] In this embodiment, diodes are provided at the output ends of the first level conversion circuit 201 and the second level conversion circuit 202 to prevent crosstalk between the two paths; and the one with a higher voltage among the two paths works, thereby ensuring the stability of the power supply.

[0069] In some embodiments, the number of the first power line pin portion 121 and the number of the second power line pin portion 122 are both n, where n≥2, and the power circuit 200 also includes n groups of first level conversion circuits 201 and second level conversion circuits 202. Different groups of first level conversion circuits 201 and second level conversion circuits 202 are used to output voltages of different voltage levels, and different groups of first level conversion circuits 201 and second level conversion circuits 202 are connected to different power lines 123.

[0070] like Figure 5 As shown, the endoscope interface board 100 includes three groups of first power line pins 121 and second power line pins 122, that is, n=3; accordingly, the power circuit 200 also includes three groups of first level conversion circuits 201 and second level conversion circuits 202. Each group of the first level conversion circuit 201 and the second level conversion circuit 202 is used to output voltages of the same magnitude, for example, the same type of LDO, so as to be able to output voltages of the same voltage level.

[0071] Specifically, Figure 5 As shown, in the first group of level conversion circuits, the first level conversion circuit 201a and the second level conversion circuit 202a are both used to convert the input 3.3V voltage into an output voltage of 2.8V. In the second group of level conversion circuits, the first level conversion circuit 201b and the second level conversion circuit 202b are both used to convert the input 3.3V voltage into an output voltage of 1.8V. In the third group of level conversion circuits, the first level conversion circuit 201c and the second level conversion circuit 202c are both used to convert the input 3.3V voltage into an output voltage of 1.2V.

[0072] The n groups of first level conversion circuits 201 and second level conversion circuits 202 may be connected to the same power supply, that is, the input terminals of all first level conversion circuits 201 and second level conversion circuits 202 may be interconnected.

[0073] In this embodiment, a dual-path level conversion circuit is provided for each voltage level, so as to ensure the reliability of each voltage.

[0074] The utility model also provides an endoscope, such as Figure 6 As shown in FIG. 1 , the endoscope comprises: an image acquisition device 1 and a host 2 as described above. In addition, the image acquisition device 1 comprises: Figure 1 or Figure 2The illustrated embodiment provides an endoscope interface board, and the endoscope interface board of the image acquisition device 1 is connected to the endoscope interface board of the host 2 .

[0075] Understandably, Figure 6 In the image acquisition device 1, the endoscope interface board 100 (i.e. Figure 6 The endoscope interface board on the left side) and the endoscope interface board 100 of the host 2 (i.e. Figure 6 The endoscope interface board on the right has the same principle. Both endoscope interface boards have pin backup structures. Among them, the pins in one endoscope interface board are male pins, and the pins in the other endoscope interface board are female pins, so as to realize the connection between the two endoscope interface boards.

[0076] like Figure 6 As shown, the image acquisition device 1 includes an image sensor (e.g., a CMOS sensor) and an interface conversion circuit, which may be a MIPI (Mobile Industry Processor Interface) to serial circuit. After the image sensor of the image acquisition device 1 acquires an image (e.g., a human tissue image), the 5 pairs of MIPI differential signals of the image sensor may be converted into a pair of serial signals by the interface conversion circuit and transmitted to the endoscope interface board of the image acquisition device 1 via a cable, and then transmitted to the processor 300 of the host 2 via the endoscope interface board 100 of the host 2; after the processor 300 processes the signal, it may be transmitted to the monitor 3 via the display interface for display.

[0077] Among them, since the image acquisition device 1 is very small, adding MIPI and power backup will cause the board to become larger and difficult to back up; and the interface conversion circuit of the image acquisition device 1 is generally connected to the endoscope interface board 100 of the image acquisition device 1 through a coaxial cable (including data line, control line, power line). If the coaxial cable is backed up, the OD (Outside Diameter) of the coaxial cable will increase, which cannot meet the product requirements. In addition, the coaxial cable is integrally formed and welded reliably, so it is not suitable for backup.

[0078] In this embodiment, the pins of the endoscope interface board 100 between the image acquisition device 1 and the host 2 are backed up, and the implementation method is easy to operate and can improve the reliability of transmission.

[0079] Although the embodiments of the present invention are described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. An endoscope interface board, characterized in that: include: A first data line pin portion (101), a second data line pin portion (102), a first control line pin portion (111), a second control line pin portion (112), a first power line pin portion (121), and a second power line pin portion (122); The first data line pin portion (101) and the second data line pin portion (102) are both used to transmit data signals; the first data line pin portion (101) is connected to the second data line pin portion (102) and is configured to be connected to a data line (103); The first control line pin portion (111) and the second control line pin portion (112) are both used to transmit control signals; the first control line pin portion (111) is connected to the second control line pin portion (112) and is configured to be connected to a control line (113); The first power line pin portion (121) and the second power line pin portion (122) are both used to transmit power signals; the first power line pin portion (121) is connected to the second power line pin portion (122) and is configured to be connected to a power line (123).

2. The endoscope interface board according to claim 1, characterized in that: The number of the first control line pin portions (111) and the number of the second control line pin portions (112) are both m; m≥2; One of the first control line pin portions (111) is connected to a corresponding second control line pin portion (112), and is configured to be connected to a serial data line (113a); Another of the first control line pin portions (111) is connected to the corresponding second control line pin portion (112) and is configured to be connected to a serial clock line (113b).

3. The endoscope interface board according to claim 1, characterized in that: The number of the first power line pin portions (121) and the number of the second power line pin portions (122) are both n; n≥2; Each of the first power line pin portions (121) is connected to a corresponding second power line pin portion (122), and is respectively configured to be connected to power lines (123) of different voltage levels.

4. A host, characterized in that: An endoscope interface board (100) according to any one of claims 1 to 3, and further comprising a power supply circuit (200) and a processor (300); The first data line pin portion (101) and the second data line pin portion (102) of the endoscope interface board (100) are connected to one end of the data line (103), and the other end of the data line (103) is connected to the processor (300); The first control line pin portion (111) and the second control line pin portion (112) of the endoscope interface board (100) are connected to one end of the control line (113), and the other end of the control line (113) is connected to the processor (300); The first power line pin portion (121) and the second power line pin portion (122) of the endoscope interface board (100) are connected to one end of the power line (123), and the other end of the power line (123) is connected to the power circuit (200).

5. The host according to claim 4, characterized in that: The power supply circuit (200) comprises a first level conversion circuit (201) and a second level conversion circuit (202); The input ends of the first level conversion circuit (201) and the second level conversion circuit (202) are used to access a power supply; The other end of the power line (123) is connected to the output ends of the first level conversion circuit (201) and the second level conversion circuit (202).

6. The host according to claim 5, characterized in that: The power supply circuit (200) further includes a first diode (D1) and a second diode (D2); The anode of the first diode (D1) is connected to the output end of the first level conversion circuit (201), and the cathode of the first diode (D1) is connected to the power line (123); The anode of the second diode (D2) is connected to the output end of the second level conversion circuit (202), and the cathode of the second diode (D2) is connected to the power line (123).

7. The host according to claim 6, characterized in that: The first diode (D1) and the second diode (D2) are both voltage-stabilizing diodes.

8. The host according to claim 5, characterized in that: The number of the first power line pin portions (121) and the number of the second power line pin portions (122) are both n, and the power circuit (200) comprises n groups of first level conversion circuits (201) and second level conversion circuits (202); Different groups of the first level conversion circuits (201) and the second level conversion circuits (202) are used to output voltages of different voltage levels, and different groups of the first level conversion circuits (201) and the second level conversion circuits (202) are connected to power lines (123) of different voltage levels.

9. The host according to claim 5, characterized in that: The first level conversion circuit (201) and the second level conversion circuit (202) are both low voltage drop linear regulators.

10. An endoscope, characterized in that: It comprises a host (2) as claimed in any one of claims 4 to 9, and also comprises an image acquisition device (1); The image acquisition device (1) comprises an endoscope interface board as claimed in any one of claims 1 to 3, and the endoscope interface board of the image acquisition device (1) is connected to the endoscope interface board of the host (2).

Images