JP5214506B2 - Endoscope device - Google Patents

Description

  The present invention relates to an endoscope apparatus.

  In recent years, in the industrial field, industrial endoscopes are widely used for observation and inspection of internal scratches and corrosion of boilers, turbines, engines, chemical plants and the like. Also, in the medical field, an endoscope that can observe various organs and the like by inserting an elongated insertion portion into a body cavity and performing various therapeutic treatments using a treatment instrument inserted into a treatment instrument channel as necessary. Mirrors are widely used.

  In a system using these endoscopes, for example, an image signal of an observation image formed on an image sensor is transmitted to a signal processing unit of a camera control unit (hereinafter abbreviated as CCU) which is a main body device, and a video signal is transmitted. It is configured so that the subject can be observed by generating and displaying an endoscopic image on a monitor screen.

  Endoscopes originally have one or more light emitting elements built into the distal end of the insertion section (hereinafter also referred to as a fixed type), and one or more light emitting elements are built into the optical adapter attached to the distal end of the insertion section. (Hereinafter also referred to as adapter exchange type).

  In the case of a fixed endoscope, the light emitting element for illumination, for example, a light emitting diode (hereinafter referred to as LED) is built in the insertion section itself, so its configuration (series and parallel) and number are determined and changed. Rather, it is driven with a predetermined constant current according to its configuration and number.

  On the other hand, in the case of an adapter-exchangeable endoscope, the LED is driven with a constant current (see, for example, Patent Document 1), but the configuration (series and parallel) and number of LEDs are attached to the distal end of the insertion portion. Since the LED differs depending on the type of the optical adapter, the LED is driven with a constant current having a value corresponding to the type. That is, the LED drive current value varies depending on the type of optical adapter. Therefore, the type of the optical adapter attached to the insertion unit is determined, and the LED drive unit controls the drive current so that a current having a value corresponding to the determination result is supplied to the LED.

  In some endoscope apparatuses, an endoscope having an insertion portion (so-called scope portion) can be attached to and detached from a main body including a processor.

JP 2006-34444 A

  There are no commercially available endoscope devices that can attach and detach the two types of endoscopes described above, that is, the fixed type and the adapter exchange type. However, an endoscope device that can be equipped with this type of endoscope is not available. Assuming that when an adapter-replaceable endoscope is connected, it is necessary to change the LED drive current value according to the type of optical adapter, so the conventional adapter-replaceable circuit remains fixed. It may be complicated to use as a circuit when an endoscope of the type is connected.

  Therefore, it has been desired to provide a small-sized endoscope apparatus that can be connected to either a fixed type or an adapter exchange type.

  An endoscope apparatus according to an aspect of the present invention includes a first endoscope having a first light-emitting element and an insertion part to which an optical adapter can be attached, and a second light-emitting element, and the insertion part. And a second endoscope having a constant current circuit capable of supplying a constant current according to a set value, and determining the type of the optical adapter An adapter type determination circuit that reads the endoscope type information indicating whether the endoscope is the first endoscope or the second endoscope provided in the connected endoscope, and the connected endoscope It is determined whether a mirror is the first endoscope or the second endoscope, and in the case of the first endoscope, a predetermined first value based on a determination result of the adapter type determination circuit The constant current circuit so as to supply the current to the first light emitting element or the second light emitting element, A control circuit for controlling the constant current circuit so as to supply a current having a predetermined second value to the first light emitting element or the second light emitting element, Have.

  Furthermore, an endoscope apparatus according to another aspect of the present invention includes a first endoscope having a first light emitting element, an insertion portion to which an optical adapter can be attached, and a second light emitting element. An endoscope apparatus connectable to any of the second endoscope having the insertion portion, a constant current circuit capable of supplying a constant current according to a set value, and the optical adapter Based on the adapter type determination circuit for determining the type and the determination result of the adapter type determination circuit, a current having a predetermined first value is supplied to the first light emitting element or the second light emitting element. When the constant current circuit is controlled and the optical adapter type determination circuit determines that the second endoscope is the second endoscope or cannot be determined to be the predetermined optical adapter, the predetermined second So as to supply a current of the value to the second light emitting element, Having a control circuit for controlling the Kijo current circuit.

  According to the present invention, both a fixed type and an adapter exchange type can be connected, and a small endoscope device can be realized.

The block diagram which shows the structure of the endoscope system comprised including the some endoscope regarding the 1st Embodiment of this invention, and the main body apparatus which can connect all of the some endoscopes. It is. It is a circuit diagram which shows the example of a structure of the constant current circuit in connection with the 1st Embodiment of this invention. It is a flowchart which shows the example of the flow of the process for illumination control in connection with the 1st Embodiment of this invention. It is a circuit diagram of an adapter type determination circuit for determining the type of adapter according to the first embodiment of the present invention. It is a block diagram which shows the structure of the endoscope system in connection with the 2nd Embodiment of this invention. It is a flowchart which shows the example of the flow of the process for illumination control in connection with the 2nd Embodiment of this invention. It is a flowchart which shows the example of the flow of a process about the modification of the 2nd Embodiment of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
(First embodiment)
FIG. 1 is a configuration diagram illustrating a configuration of an endoscope system including a plurality of endoscopes and a main body device to which any of the plurality of endoscopes can be connected.
The endoscope system 100 is a system that can connect any of the plurality of endoscopes 1 to the main body device 2 and display an endoscopic image on the monitor 3.

  The plurality of endoscopes 1 include a so-called fixed endoscope 1 </ b> A and a plurality of optical adapter exchangeable endoscopes 1 </ b> B to which the optical adapter 4 can be attached. Hereinafter, the term “endoscope 1” refers to any one endoscope or a plurality of endoscopes collectively. In each of the plurality of optical adapter exchange-type endoscopes 1B, different optical adapters 4 can be attached to the distal end portion of the insertion portion.

  The fixed endoscope 1A is an endoscope in which a light emitting diode (hereinafter abbreviated as LED) 5 as a light emitting element is built in a distal end portion of the insertion portion.

  As described above, the plurality of optical adapter exchange-type endoscopes 1B are endoscopes each having an insertion portion to which the optical adapter 4 can be attached. The optical adapter 4 includes an LED 5. That is, each optical adapter exchangeable endoscope 1B illuminates a subject by attaching an optical adapter 4 (hereinafter also simply referred to as an adapter) 4 having an LED 5 as an illuminating unit to the distal end of the insertion unit. An endoscope that can.

The fixed endoscope 1A and the LEDs built in the optical adapter 4 are one or more LEDs, and are a group of LEDs connected in series or in parallel.
In the present embodiment, the LED 5 built in the distal end portion of the fixed endoscope 1A and the LED 5 built in the optical adapter 4 are each a light emitting diode, but the light emitting element may be a laser diode or the like. Good.

  Each endoscope 1 is provided with a memory 6 that stores endoscope type information. The memory 6 is a non-volatile storage unit, and is an endoscope type information storage unit that stores information indicating the type of endoscope whether the endoscope is a fixed type or an adapter exchange type.

  The main unit 2 includes a CPU 2a and a constant current circuit (CC) 2b. The endoscope 1 is electrically connected to the main body device 2 via the connector 7 of the main body device 2, and the contents of the memory 6 are read out by the CPU 2a.

  In addition to the information indicating the type of the endoscope 1, the memory 6 may include individual information for each endoscope, for example, information on the type of adapter that can be attached. Some of the plurality of optical adapter exchange-type endoscopes 1B have different insertion portion diameters, for example, 4 mm and 6 mm. Since the types of adapters that can be mounted for each endoscope are different, information on such adapters that can be mounted may be stored in the memory 6.

  As described above, both the fixed endoscope 1A and the adapter-exchangeable endoscope 1B can be connected to the main body device 2 as the endoscope apparatus. Further, there are a plurality of types of adapter-replaceable endoscopes 1B, and the user connects a desired type of endoscope 1 to the main unit 2 and causes the monitor 3 to display an endoscope image of the subject. Thus, the examination of the subject can be performed.

  FIG. 2 is a circuit diagram showing an example of the configuration of the constant current circuit (CC) 2b. The constant current circuit 2 b includes a digital-analog converter (hereinafter referred to as a D / A converter) 11, an operational amplifier 12, a transistor 13, a constant current determining resistor 14, a switch 15, and a current detection circuit 16. It is configured. The constant current circuit 2b supplies a constant current according to setting data from the CPU 2a to the LED 5 of the endoscope 1A or the LED 5 of the adapter 4.

  Setting data from the CPU 2a as a control circuit for controlling the constant current circuit 2b is input to the D / A converter 11, and the D / A converter 11 generates an analog voltage corresponding to the setting data, and generates the generated analog The voltage is output to the positive input terminal of the operational amplifier 12.

  The output of the operational amplifier 12 is supplied to the gate of the transistor 13. The collector side of the transistor 13 is connected to the power source V1 via the LED 5 incorporated in the insertion portion of the endoscope 1A or the LED 5 in the adapter 4 attached to the insertion portion of the endoscope 1B. The LED 5 is connected to a resistor 5a for adapter identification in parallel.

  The emitter side of the transistor 13 is connected to the ground via the constant current determining resistor 14 and the switch 15. A connection point C1 between the transistor 13 and the constant current determining resistor 14 is connected to the negative input terminal of the operational amplifier 12.

  As will be described later, the CPU 2a of the main body device 2 determines the type of the connected endoscope 1 from the contents of the memory 6, and supplies a predetermined value corresponding to the determination result to the constant current circuit 2b as a set value. To do. When it is determined that the connected endoscope 1 is fixed, the CPU 2a supplies a predetermined value corresponding to the fixed endoscope 1A as a set value to the constant current circuit 2b. For example, the D / A converter 11 can change the output voltage in the range of 0 to 3.3 V, and outputs a voltage corresponding to the input digital signal. Therefore, the CPU 2a supplies the set value to the D / A converter 11 so that the D / A converter 11 outputs a desired output voltage.

  The operational amplifier 12 generates an output voltage so that the voltage value output from the D / A converter 11 is equal to the connection point C1, and as a result, a predetermined constant current is supplied to the LED 5, and an appropriate voltage is supplied. The subject can be illuminated with brightness.

  The constant current circuit 2b is provided with a current detection circuit 16. The current detection circuit 16 operates to limit the current or stop the supply of power when a current exceeding a predetermined value flows to the LED 5.

The current detection circuit 16 is provided with a register 16a that stores data of a current value set by the CPU 2a. The current detection circuit 16 monitors whether or not the current of data set in the register 16a is supplied to the LED 5, and when the current deviates from the set value, a control signal for stopping the supply of current to the LED 5 Is output to the switch 15. The switch 15 is a switch that is turned off when receiving a control signal for stopping the supply of current. As a result, no current flows through the LED 5, and the LED 5 is turned off.
When detecting that an abnormal current is supplied, the current detection circuit 16 may output a detection signal to the display lamp indicating the abnormality.

  Furthermore, when there is a high / normal switching switch for increasing the brightness for illuminating the subject, the current detection circuit 16 determines whether or not the value deviates from the value corresponding to each of the high and normal. It may be.

  In that case, the current detection circuit 16 has two registers corresponding to high and normal. The set value is stored in the normal register, and the high value is set and stored in the high register. The current detection circuit 16 determines whether or not the current flowing through the LED 5 has deviated from one of the two registers according to the operation of the high / normal switch, and outputs a control signal or the like if it is determined to be deviated. .

  FIG. 3 is a flowchart illustrating an example of a flow of processing for lighting control. The processing of FIG. 3 is stored in a storage device (not shown) in the main device 2, and is read and executed by the CPU 2a that is a control circuit.

  The user can turn on, that is, turn on the illumination unit at the tip of the insertion unit, here the LED 5, by pressing a predetermined button on the operation unit (not shown). The operation of a predetermined button is transmitted to the CPU 2a. Therefore, the CPU 2a determines whether or not such a button has been pressed and a lighting instruction has been issued (step S1).

  If there is no lighting instruction, no processing is performed, but if there is a lighting instruction, the CPU 2a determines whether or not the connected endoscope 1 is an adapter exchange type (step S2). This determination is performed by reading the contents of the memory 6.

  If the connected endoscope 1 is a fixed type, NO is determined in step S2, and the CPU 2a sets the structure of the software for the fixed type endoscope (step S3). This setting includes setting a program so as not to process a circuit that is not used in the fixed type, and setting or changing a program so that software processing not used in the fixed type is not performed. For example, in the case of the fixed type, since the adapter 4 is not attached to the distal end portion of the insertion portion of the endoscope 1A, it is not necessary to use a detection circuit that detects the detachment of the adapter 4 from the distal end portion. Further, since the processing program at the time of detecting the disconnection is not executed, such a circuit and processing are set or changed so as not to be used.

  After step S3, the CPU 2a sets the drive current value to a value preset for a fixed endoscope (step S4). This setting is performed by setting a setting value from the CPU 2a to the D / A converter 11.

  If the connected endoscope 1 is an adapter replaceable type, YES is determined in step S2, and the CPU 2a sets the structure of the adapter replaceable endoscope software (step S5). This setting is the same as step S3 described above, and is set or changed so that only the circuit and software used in the adapter exchange type are used.

  Next, it is determined whether or not an optical adapter (hereinafter also referred to as an adapter) 4 is attached (step S6). If the adapter 4 is not attached, the process returns to step S1.

  If the adapter 4 is attached, the CPU 2a determines the type of the adapter 4 (step S7).

  The type of the adapter 4 is determined using a circuit shown in FIG. 4 in which a current having a predetermined value smaller than the current value during illumination is passed through the resistor 5a connected in parallel to the LED 5.

  A predetermined resistor 5a, that is, an adapter identifying resistor is connected in parallel to the LED 5 of the adapter 4. The resistor 5 a has a resistance value corresponding to the type of the adapter 4. Therefore, the CPU 2a can determine the type of the adapter 4 by supplying a predetermined current to the resistor 5a and detecting a voltage drop caused by the resistor 5a.

  FIG. 4 is a circuit diagram of an adapter type determination circuit for determining the type of the adapter 4. An adapter type determination circuit (hereinafter also referred to as a determination circuit) 17 that determines the type of adapter includes a switch 21 and a voltage detection circuit 22. The determination circuit 17 is controlled so that a predetermined voltage V2 of about 3.3 V can be supplied to the LED 5 and the resistor 5a connected in parallel to the LED 5 in a state where no illumination current is supplied to the LED 5, for example. A switch 21 is provided. When the CPU 2a outputs the determination instruction signal DS, the switch 21 is turned on, and a predetermined voltage V2 is applied to the LED 5 and the resistor 5a.

The voltage detection circuit 22 receives a voltage at a connection point C2 between the resistor 5b and the resistor 5b connected between the resistor 5a and the ground, and monitors the voltage. The voltage detection circuit 22 outputs the detected voltage value to the CPU 2a.
As a result, the CPU 2a can determine the type of the optical adapter 4 based on the input voltage value.

Returning to FIG. 3, the CPU 2a sets a drive current value by supplying a value corresponding to the determined adapter 4 to the D / A converter 11 of the constant current circuit 2b (step S8).
When the driving current value is set, constant current driving for the LED 5 is performed (step S9).

It is determined whether or not there has been a turn-off instruction. If there is no turn-off instruction, the CPU 2a makes a NO determination in step S10 and does not perform any processing.
If there is a turn-off instruction, the CPU 2a becomes YES in step S10 and performs a turn-off process (step S11). Specifically, it instructs the constant current circuit to output 0 (zero).

As described above, when there is a lighting instruction, it is determined whether or not it is a fixed type, and in the case of the fixed type, the CPU 2a supplies the constant current corresponding to the fixed endoscope. To control. In the case of an adapter exchangeable endoscope, the CPU determines the type of the connected adapter and supplies the current according to the determination result, that is, the current corresponding to the adapter 4, so that the CPU supplies the constant current circuit 2b. To control.
Therefore, the main body apparatus can be connected to both the fixed type and adapter exchange type endoscopes, and a single constant current circuit is sufficient, so that the size of the apparatus can be reduced.

(Second Embodiment)
In the first embodiment, by determining the type of endoscope, it is determined whether it is a fixed type or an adapter exchange type, and a predetermined constant current is supplied to the fixed type endoscope according to the determination result. In the case of an adapter exchangeable endoscope, a constant current is supplied so that a predetermined constant current is supplied to the adapter exchangeable endoscope according to the determination result of the adapter type. Control the circuit. On the other hand, in the second embodiment, a fixed endoscope is determined without determining the type of the endoscope, and a predetermined constant current is supplied to the fixed endoscope. This is different from the first embodiment in that the constant current circuit is controlled as described above.

FIG. 5 is a configuration diagram showing the configuration of the endoscope system according to the present embodiment. The endoscope system 101 includes a plurality of endoscopes and a main body device that can be connected to any of the plurality of endoscopes.
The endoscope system 101 can connect any of the fixed endoscope 1Aa, the adapter-exchangeable endoscopes 1Ba, 1Bb, and the like to the main unit 2A and display an endoscope image on the monitor 3. It is a system that can. Each endoscope 1 does not have a memory that stores the type of endoscope. Hereinafter, when referring to any one endoscope or when referring to a plurality of endoscopes collectively, it is referred to as an endoscope 1a.

  The main unit 2A has the same configuration as the main unit 1 of FIG. 1, and includes a CPU 2a, a constant current circuit (CC) 2b, and an adapter type determination circuit 17, and a CPU 2a as a control circuit for controlling the constant current circuit 2b. Can read and execute a program stored in a storage device (not shown).

FIG. 6 is a flowchart illustrating an example of a flow of processing for lighting control. Here, an example in which there are three types of adapters 4 will be described.
The user can turn on the illumination unit at the tip of the insertion unit, here the LED 5, by pressing a predetermined button on the operation unit (not shown). The CPU 2a as the control circuit determines whether or not such a button has been pressed and a lighting instruction has been issued (step S21).

  If there is no lighting instruction, no processing is performed, but if there is a lighting instruction, the CPU 2a determines whether or not the optical adapter 4 is attached and whether or not a fixed endoscope is connected. (Step S22). If the adapter 4 is not attached or if a fixed endoscope is not connected, the process returns to step S21.

If the adapter 4 is attached or if a fixed endoscope is connected, the CPU 2a determines the type of the adapter 4 (step S23).
The adapter type determination circuit shown in FIG. 4 is used to determine whether the adapter 4 is attached and whether a fixed endoscope is connected and the adapter type is determined as in the first embodiment. 17 is performed by flowing a current having a predetermined value smaller than the current value during illumination through the LED 5 and the parallel resistor 5a.

  Even if the supply of a predetermined current is started, if no current flows, it is determined that the optical adapter 4 is not connected or that a fixed endoscope is not connected.

  When a voltage generated when a fixed endoscope is connected as a result of flowing a predetermined current is detected, the determination circuit 17 determines that the fixed endoscope 1Aa is connected. Can do.

  Furthermore, when the determination circuit 17 detects a voltage generated when the adapter 4 is connected as a result of flowing a predetermined current, the determination circuit 17 can determine that the adapter-replaceable endoscope is connected, and The type of adapter can also be determined according to the detected voltage value.

  That is, the resistance value of the parallel resistor 5a is set so that the voltage generated when the fixed endoscope is connected and the voltage generated when each adapter is connected are different from each other.

  As a result of the determination of the type of the optical adapter, if it is determined that the connected endoscope is fixed, YES is determined in step S24, and the CPU 2a sets a fixed driving current value (step S25). ).

  As a result of the determination of the type of the optical adapter, if the connected adapter 4 is the A type, NO is determined in step S24, YES is determined in step S26, and the CPU 2a sets the drive current value for the adapter A (step S27).

  As a result of determining the type of the optical adapter, if the connected adapter 4 is the B type, NO is determined in steps S24 and S26, YES is determined in step S28, and the CPU 2a sets the drive current value for the adapter B. (Step S29).

  As a result of the determination of the type of the optical adapter, if the connected adapter 4 is the C type, NO is determined in steps S24, S26 and S28, and the CPU 2a sets the drive current value for the adapter C (step S30). .

As described above, the CPU 2a sets the drive current value by supplying the value corresponding to the determined adapter 4 to the D / A converter 11 of the constant current circuit 2b.
When the driving current value is set, constant current driving for the LED 5 is performed (step S31).

It is determined whether or not there has been a turn-off instruction, and if there is no turn-off instruction, the CPU 2a becomes NO in step S32 and does not perform any processing.
If there is a turn-off instruction, the CPU 2a becomes YES in step S32 and performs a turn-off process (step S33).

As described above, according to the present embodiment, in the determination of the adapter type without determining the endoscope type, the fixed endoscope is determined and the adapter type is determined. A constant current circuit is controlled so that a predetermined constant current is supplied to the fixed endoscope.
Therefore, the main body apparatus can be connected to both fixed and adapter-replaceable endoscopes, and a single constant current circuit is sufficient. Therefore, the apparatus can be reduced in size.

  Therefore, it is possible to suppress an erroneous drive current from being supplied to the fixed endoscope. Alternatively, in the case of erroneous mounting, it is possible to reduce the case where the connected endoscope does not operate properly or the operation becomes unqualified.

  Moreover, since it is not necessary to prepare two main body apparatuses corresponding to each of the fixed type and the adapter exchange type, it is possible for the user to easily prepare for inspection as well as cost.

  Furthermore, both the fixed type and adapter exchange type substrates are mounted in one main unit, and it is not necessary to switch the substrate to be used according to the connected endoscope. The size of the main body can be reduced as compared with the case where it is mounted on.

  In the above example, whether the endoscope is a fixed type is performed by detecting a predetermined voltage. However, as a modification, when the detected voltage is not a voltage for any adapter, the fixed type is used. You may make it determine with it.

FIG. 7 is a flowchart showing an example of the flow of processing for the modification.
The same processing as in FIG. 6 is assigned the same step number, description thereof is omitted, and only different points will be described.

  As shown in FIG. 7, after step S23, in step S41, it is determined whether or not the connected adapter 4 is the A type. As a result of the determination, if the connected adapter 4 is the A type, YES is determined in the step S41, and the CPU 2a sets the drive current value for the adapter A (step S27).

  After step S23, when the connected adapter 4 is not the A type, NO is determined in step S41, and it is determined whether or not the connected adapter 4 is the B type (step S42). If the connected adapter 4 is the B type, YES is determined in the step S42, and the CPU 2a sets the drive current value for the adapter B (step S29).

After step S23, when the connected adapter 4 is not the B type, NO is determined in steps S41 and S42, and it is determined whether or not the connected adapter 4 is the C type (step S43). If the connected adapter 4 is the C type, YES is determined in the step S43, and the CPU 2a sets a drive current value for the adapter C (step S30).
After step S23, when the connected endoscope is a fixed type, NO is determined in steps S41, S42, and S43, and the CPU 2a sets a fixed type drive current value (step S25).

  As described above, also in the modified example shown in FIG. 7, the main body apparatus can be connected to both fixed and adapter-replaceable endoscopes, and a single constant current circuit is sufficient. Can be realized.

  In the above example, there are three types of adapters. However, when there are three or more types, the drive current value is set so that the drive current value is set according to each of the plurality of types. The

  Therefore, according to the present embodiment described above, the CPU 2a that is the control circuit is configured to supply a constant current corresponding to each adapter 4 to the LED 5 based on the determination result of the adapter type determination circuit 17. The circuit 2b is controlled. Further, when the adapter type determination circuit 17 determines that the adapter type determination circuit 17 is a fixed endoscope, or cannot determine that the adapter type determination circuit 17 is a predetermined optical adapter 4, the CPU 2a supports the fixed endoscope. The constant current circuit 2b is controlled so as to supply a current having a current value to the LED 5.

As described above, according to the above-described embodiments, it is possible to realize a small-sized endoscope apparatus that can be connected to both the fixed type and the adapter exchange type.
The present invention is not limited to the above-described embodiments, and various changes and modifications can be made without departing from the scope of the present invention.

That is, the endoscope according to the present invention is limited to the endoscope in which the light emitting element is incorporated in the distal end portion of the insertion portion and the optical adapter attached to the distal end of the insertion portion. Instead, the light emitting element may be provided on the proximal end side of the endoscope and guided to the distal end side of the endoscope with a light guide or the like.
Needless to say, the first light-emitting element and the second light-emitting element may be the same.

  100, 101 Endoscope system, 1, 1a Endoscope, 1, 1A, 1B, 2, 2A Main unit, 2a CPU, 2b Constant current circuit, 3 Monitor, 4 Optical adapter, 5 LED

Claims (3)

A first endoscope having a first light emitting element and an insertion part to which an optical adapter can be attached;
An endoscope apparatus that can be connected to any of the second endoscope including the second light emitting element and having the insertion portion,
A constant current circuit capable of supplying a constant current according to a set value;
An adapter type determination circuit for determining the type of the optical adapter;
Endoscope type information indicating whether the first endoscope or the second endoscope provided in the connected endoscope is read, and the connected endoscope is the first endoscope. Determine whether the endoscope or the second endoscope,
In the case of the first endoscope, a current having a predetermined first value based on the determination result of the adapter type determination circuit is supplied to the first light emitting element or the second light emitting element. Control the constant current circuit;
In the case of the second endoscope, a control circuit for controlling the constant current circuit so as to supply a current having a predetermined second value to the first light emitting element or the second light emitting element; ,
An endoscope apparatus characterized by comprising: The constant current circuit has a digital-analog converter and outputs an analog value corresponding to an input digital value;
The control circuit outputs the digital value to the constant current circuit, whereby the predetermined first value current or the predetermined second value current is output to the first light emitting element or the second light emitting element. The endoscope apparatus according to claim 1, wherein the constant current circuit is controlled so as to be supplied to the light emitting element. A first endoscope having a first light emitting element and an insertion part to which an optical adapter can be attached;
An endoscope apparatus that can be connected to any of the second endoscope including the second light emitting element and having the insertion portion,
A constant current circuit capable of supplying a constant current according to a set value;
An adapter type determination circuit for determining the type of the optical adapter;
Based on the determination result of the adapter type determination circuit, the constant current circuit is controlled so as to supply a current having a predetermined first value to the first light emitting element or the second light emitting element,
If the optical adapter type determination circuit determines that the second endoscope is used or if it is not determined that the optical adapter type is a predetermined optical adapter, a current of a predetermined second value is supplied to the second endoscope. A control circuit for controlling the constant current circuit to supply the light emitting element;
An endoscope apparatus characterized by comprising:

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