JP3610240B2 - Endoscope light source device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an endoscope light source device that supplies illumination light to an endoscope.
[0002]
[Prior art]
In recent years, endoscopes have been widely used in the medical field and the industrial field. The endoscope is configured by an endoscope light source device (also simply referred to as a light source device) that generates illumination light, and the illumination light supplied from the light source device is transmitted by a light guide to A subject such as the inside of a living body is illuminated from the front end illumination window.
[0003]
As a conventional technique, for example, in the light source device disclosed in Japanese Patent Laid-Open No. 8-76029, an endoscope device for observing an endoscopic image of an organ or the like of a living body lumen is configured by a light source device, a television camera, and a monitor. Automatic light control means is provided for automatically adjusting the brightness of the light to a brightness suitable for observation.
[0004]
There are two types of automatic light control means, one of which is a method of controlling the amount of illumination light output from the light source device by the luminance signal of the television camera as disclosed in the above publication.
The other is an element shutter system in which brightness is controlled by variably controlling the accumulation time during imaging of a CCD in an imaging device such as a television camera.
[0005]
[Problems to be solved by the invention]
In the element shutter method, the brightness is controlled only by the TV camera regardless of the brightness of the light source device. The tissue state is likely to change from the normal state, and the function of maintaining a state in which diagnosis is easy may be reduced.
[0006]
That is, the state of the living tissue changes from the normal state to red due to the heat of the illumination light, causing a change in color tone and the like, and a change in color tone that is an important factor in making a diagnosis or the like is likely to occur. If this condition continues for a long time, it may cause swelling and burns.
[0007]
The present invention has been made in view of the above points, and an endoscope light source device that can prevent adverse effects due to excessive illumination light even when used with different types of video signal processing devices such as an element shutter system. The purpose is to provide.
[0008]
[Means for Solving the Problems]
An endoscopic light source device of the present invention is an endoscopic light source device that generates illumination light for obtaining an endoscopic image, and processes an imaging signal from a first imaging device that captures an endoscopic image. A first video signal processing device having a dimming signal output circuit that outputs a dimming signal applicable to the light source device based on the imaging signal, and the first imaging device that images an endoscopic image; A second image that does not have a dimming signal output circuit that processes an imaging signal from a second imaging device different from the above and outputs a dimming signal adaptable to the light source device based on the imaging signal In the endoscope light source device capable of connecting either one of the signal processing device and the signal processing device, the maximum emitted light amount of illumination light that can be generated when the second video signal processing device is connected is set to the first light emitting device. Illumination light that can be generated when a video signal processing device is connected Characterized by comprising an emission light quantity setting means for setting smaller than the maximum amount of emitted light .
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
(First embodiment)
1 to 4 relate to a first embodiment of the present invention, FIG. 1 shows an appearance of an endoscope light source device according to the first embodiment, and FIG. 2 shows an internal configuration of the endoscope light source device and the like. FIG. 3 shows a specific circuit configuration of the CCU connection detection circuit, and FIG. 4 shows an operation mode by type detection by the LG cable type detection means.
[0010]
An endoscope apparatus 1A shown in FIG. 1 includes, for example, a rigid endoscope 2 as an endoscope, and an endoscope light source apparatus that generates illumination light to be supplied to the rigid endoscope 2 (hereinafter simply referred to as a light source apparatus). 3A and a light guide (LG) cable 4 that is detachably connected to the light source device 3A, transmits light (guides light), and supplies the light to the rigid endoscope 2.
[0011]
The rigid endoscope 2 includes a rigid and elongated insertion portion 5, a large-diameter gripping portion 6 provided at the rear end of the insertion portion 5, and an eyepiece portion 7 provided at the rear end of the gripping portion 6. The cap of the LG cable 4 is connected to the LG cap connecting portion 8 of the grip portion 6.
[0012]
Although FIG. 1 shows a configuration in the case of the endoscope apparatus 1A for observing with the naked eye from the eyepiece unit 7, a television camera 11 as an imaging device can be attached to the eyepiece unit 7, and the endoscope in this case The configuration of the mirror device 1B is shown in FIG.
[0013]
The endoscope apparatus 1B shown in FIG. 2 is connected to the television camera 11 as an imaging apparatus attached to the rigid endoscope 2 in the endoscope apparatus 1A of FIG. It has a camera control unit (hereinafter abbreviated as CCU) 12 as a video signal processing device that performs processing to be generated, and a monitor 13 that displays a video signal output from the CCU 12.
[0014]
As shown in FIG. 2, the light source device 3 </ b> A is provided with an LG connector receiver 15, and the LG connector 16 at the end of the LG cable 4 is connected to the LG connector receiver 15.
In the light source device 3A, for example, a discharge lamp 17 is disposed as a light source lamp that emits light at a position facing the LG connector 15, and the discharge lamp 17 is turned on by supplying lamp lighting power from a lamp lighting circuit 18. To do.
[0015]
The lit light is collected by a parabolic reflector 19 and condensed and irradiated on the vicinity of the center of the end face of the LG connector 16, that is, on the end face of the light guide 21.
In the illumination light path between the discharge lamp 17 and the LG connector 16, a diaphragm 22 for adjusting the illumination light is provided. The diaphragm 22 includes a diaphragm blade 23 and a motor 24 that rotates about the base end shaft of the diaphragm blade 23, and the motor 24 is driven by a diaphragm drive circuit 25.
[0016]
Illumination light supplied to the light guide 21 through the diaphragm 22 is supplied from the LG base connection portion 8 to the light guide 26 in the rigid endoscope 2, transmitted by the light guide 26, and transmitted from the distal end portion of the insertion portion 5. The light is emitted forward from the front end surface fixed to the illumination window, and illuminates a subject such as an affected part.
The illuminated subject is imaged by the objective lens 27 attached to the observation window, and the image is transmitted to the rear end side of the insertion portion 5 by the relay lens system 28. This image can be enlarged and observed by the eyepiece lens 29.
[0017]
A camera head 31 of a television camera 11 can be attached to the eyepiece 7 of the rigid endoscope 4 as shown in FIG. An imaging lens 32 is arranged in the camera head 31 so as to face the eyepiece lens 29, and a charge coupled device (abbreviated as CCD) 33 as a solid-state imaging device is arranged at the imaging position.
[0018]
The signal line connected to the CCD 33 is inserted through a cable 34 extended from the camera head 31 and connected to the CCU 12 by a connector 35. Then, by applying a CCD drive signal from the CCD driver 36 in the CCU 12, the image pickup signal photoelectrically converted by the CCD 33 is input to the video signal processing circuit 37 in the CCU 12.
[0019]
A standard video signal is generated from the imaging signal by the video signal processing circuit 37, and this video signal is input to the monitor 13 from the video output terminal 37, and a subject image (endoscopic image) is displayed on the display surface of the monitor 13. . The luminance signal generated by the video signal processing circuit 37 is input to a dimming signal output circuit 38, and a dimming signal whose pulse width is modulated corresponding to the brightness of the endoscopic image is generated from the imaging signal from the CCD 33. Thus, the light can be output from the dimming signal output connector 40.
[0020]
The dimming signal is input to the dimming circuit 45 through the CCU connection detection circuit 43 from the dimming signal input connector 42 of the light source device 3A via the dimming cable 41 connected to the output connector 40.
[0021]
A video signal is input from the video signal input connector 46 to the dimming circuit 45 provided in the light source device 3A. Alternatively, a dimming signal input from the dimming signal input connector 42 is input through the CCU connection detection circuit 43.
[0022]
In addition, the dimming reference signal from the control circuit 47 is input to the dimming circuit 45, and the diaphragm driving circuit 25 is controlled by the input signal via the diaphragm operation limiting circuit 48, thereby illuminating the light source device 3A. Control the brightness of light.
[0023]
In this embodiment, the LG cable type detection means 49 provided on the LG connector receiver 15 of the light source device 3A connects the type of the LG cable 4, for example, the high-luminance mode compatible LG cable or the normal mode compatible LG cable. It has come to detect whether it was done.
[0024]
When a normal mode-compatible LG cable is detected, a detection signal is input to the diaphragm operation restriction circuit 48. When a normal mode-compatible LG cable is detected, the diaphragm operation is compared to when a high-luminance mode-compatible LG cable is detected. The limiting circuit 48 reduces the maximum opening amount of the diaphragm 23 via the diaphragm driving circuit 25. Further, the diaphragm operation limiting circuit 48 outputs a signal from the dimming circuit 45 to the diaphragm driving circuit 25.
[0025]
The CCU connection detection circuit 43 provided in the light source device 3A is a dedicated CCU 12 that incorporates the dimming signal output circuit 38 shown in FIG. 2 (in the light source device 3A) by a signal input to the dimming signal input connector 42. In the CCU 12 different from the CCU 12, that is, in the CCU 12 of FIG. 2, the brightness of the video signal can be observed by an element shutter that varies the charge accumulation time without incorporating the dimming signal output circuit 38 (and therefore does not have the connector 40). It is detected whether or not a general-purpose CCU that performs video signal processing for dimming to an appropriate brightness is connected, and the diaphragm operation restriction circuit 48 restricts the diaphragm operation according to the detection result.
[0026]
FIG. 3 shows an example of the configuration of the CCU connection detection circuit 43.
The dimming signal input connector 42 is provided with a contact c connected to a light emitting element (abbreviated as LED) 52 of the photocoupler 51 constituting the CCU connection detection circuit 43. By connecting the dimming cable 41, the contact c is It is connected to the GND of the CCU 12 through the contact c of the dimming signal output connector 40 of the CCU 12 via the signal line 41 c of the dimming cable 41.
[0027]
The GND line 41b of the dimming cable 41 is connected to the GND of the light source device 3A via the contact b of the dimming signal output connector 40 and the dimming signal input connector 42.
[0028]
The signal line 41 a for transmitting the dimming signal is input to the dimming circuit 45 through the contact a of the dimming signal output connector 40 and the dimming signal input connector 42.
[0029]
The anode of the LED 52 of the photocoupler 51 is connected to the power supply terminal Vcc via the resistor R1. The collector of the phototransistor 53 of the photocoupler 51 is connected to the power supply terminal Vcc via the resistor R2, and also serves as an output terminal of a detection signal, outputs a detection signal to the aperture operation limiting circuit 48, and an emitter to GND. It is connected.
[0030]
With this configuration, when the dimming cable 41 is connected to the CCU 12 and the light source device 3A, the dimming signal that has passed through the buffer 38a of the dimming signal output circuit 38 is input from the contact a to the dimming circuit 45 via the signal line 41a. .
[0031]
The LED 52 is in a state where the cathode is connected to the GND via the signal line 41c of the dimming cable 41, the LED 52 emits light, and the phototransistor 53 is turned on (conducted) in response to this light. Therefore, an “L” level detection signal is output.
[0032]
On the other hand, if the dimming cable 41 is not connected, the LED 52 does not emit light, so that the phototransistor 53 is turned off (non-conducting), and the detection signal is at the “H” level that is not connected.
[0033]
In this way, a contact is formed to form a loop between the dimming signal input connector 42 on the light source device 3A side and the CCU 12, and the LED 52 of the photocoupler 51 is connected. The LED 52 is connected to GND by a circuit on the CCU 12 side. When the CCU 12 is connected by the dimming cable 41, the LED 52 is turned on, the phototransistor 53 of the photocoupler 51 is turned on, and a connection detection signal is output.
When the connection of the CCU 12 is detected, a detection signal is input to the diaphragm operation restriction circuit 48 so that the diaphragm operation restriction circuit 48 does not operate.
[0034]
Further, the front panel 55 of the light source device 3A has a changeover switch for switching between automatic light control and manual light control, or in the case of automatic light control, the brightness of the subject image (endoscopic image) displayed on the monitor 13 is a reference. There are provided a switch for changing the level of the dimming reference signal set to the brightness of the light up or down, or a switch for changing the level of the illumination light up or down in the case of manual dimming.
[0035]
In the present embodiment, a dedicated CCU 12 provided with a dimming signal output circuit 38 for generating a signal for adjusting the illumination light amount of the light source device 3A to a brightness suitable for observation from the imaging signal of the CCD 33, and the imaging signal of the CCD 33 are used. Identifying and detecting connection with a general-purpose CCU equipped with a light control function of an element shutter system that variably sets the brightness of the video signal according to the accumulation time (regardless of controlling the amount of light emitted from the light source device 3A) Even if the element shutter functions, the CCU connection detection circuit 43 is provided, and when the general CCU is connected by the CCU connection detection circuit 43, the maximum light quantity emitted from the light source device 3A is limited. The subject is not exposed to excessive illumination light.
[0036]
Generally, brightness control is possible by using a video signal as a dimming signal of the light source device. However, when the element shutter system is used, the dimming signal is already controlled by the element shutter system. Therefore, the brightness control of the light source device may be inappropriate based on this signal controlled to have a constant brightness. Brightness control on the light source device side can be realized by providing a dimming signal output circuit 38 that outputs a dimming signal with priority over the element shutter system.
[0037]
The operation of the first embodiment configured as described above will be described.
When a general CCU having an element shutter function that does not have the dimming signal output circuit 38 is connected, a video signal is input to the video signal input connector 46 of the light source device 3A. In this case, since nothing is connected to the dimming signal connector 42, the CCU connection detection circuit 43 does not detect the connection of the CCU, so the diaphragm operation restriction circuit 48 is activated, and the operation range of the diaphragm 22 is restricted. The normal mode in which only a half of the maximum light amount is emitted is limited.
[0038]
In this case, the operating range of the diaphragm 22 as described above is not limited to the case where the LG cable 4 connected to the light source device 3A is compatible with the high luminance by the LG cable type detection means 49, as well as the one corresponding to high luminance. The operation is limited to the normal mode operation.
[0039]
On the other hand, when a dedicated CCU 12 having the dimming signal output circuit 38 shown in FIG. 2 (that is, not having an element shutter function) is connected, the dimming cable 41 connects the dimming signal input connector 42 and the CCU 12 as described above. A connection loop is formed, and the CCU connection detection circuit 43 detects the formation of the loop.
[0040]
The detection signal from the CCU connection detection circuit 43 prevents the diaphragm operation restriction circuit 48 from restricting the diaphragm operation, so that the diaphragm 22 operates in a high luminance mode in which dimming control is performed without being limited to the maximum light amount. To do.
[0041]
In this case, if the LG cable 4 connected to the light source device 3A is compatible with high luminance by the LG cable type detecting means 49, the diaphragm operation limiting circuit 48 operates in the high luminance mode as described above. On the other hand, if the LG cable 4 connected to the light source device 3A is for the normal mode by the LG cable type detecting means 49, the aperture operation limiting circuit 48 performs the aperture operation limiting operation and operates in the normal mode. . In other words, the operating range of the diaphragm 22 is limited, and the normal mode in which only a light amount of about half of the maximum light amount is emitted is limited.
[0042]
FIG. 4 summarizes the above-described actions, and shows a table showing the mode of operation in the high luminance mode or the normal mode depending on the type of CCU and the type of LG cable 4.
Although the above description has been given for the case where the automatic dimming mode is set, the dimming can be performed by an operation from the front panel 55 when the manual dimming is switched.
[0043]
According to the present embodiment, either an element shutter type general CCU or a dedicated CCU 12 can be used. When the general CCU is used, half of the maximum amount of emitted light that can be emitted from the light source device 3A. Therefore, the living tissue can be prevented from changing to a reddish color tone (from the state before irradiation) due to the heat of the illumination light emitted from the light source device 3A, and for a longer time. It is possible to reliably prevent burns and the like that may occur during irradiation.
[0044]
Therefore, it is possible to prevent adverse effects such as changes in the state of the living tissue due to the heat of the emitted illumination light and changes in color tone, which are a major factor in diagnosis, and it is easy for the operator to make an accurate diagnosis. The state can be maintained. That is, the illumination state suitable for diagnosis can be maintained.
Further, when the general shutter CCU of the element shutter type is used, the amount of light emitted from the light source device 3A is limited to about half of the maximum amount of emitted light, but the monitor 13 has a brightness suitable for observation due to the element shutter function. The subject image (endoscopic image) can be displayed. The discharge lamp 17 is not particularly limited as long as it is a discharge lamp such as a xenon lamp or a mercury lamp of a metal halide lamp.
[0045]
In the present embodiment, the case where the rigid endoscope 2 is used has been described, but the present invention can also be applied to a flexible endoscope. In addition to the optical endoscope, the present embodiment can also be applied to the case where an electronic endoscope having a built-in imaging device such as a CCD is used.
[0046]
(Second Embodiment)
Next, a second embodiment of the present invention will be described with reference to FIG. In addition, the same code | symbol is attached | subjected to the component similar to 1st Embodiment, and the description is abbreviate | omitted.
FIG. 5 shows a configuration of an endoscope apparatus 1C including the light source device 3B according to the second embodiment.
[0047]
For example, a halogen lamp 61 is provided as a light source lamp inside the light source device 3B. The lit light is condensed on the end face of the LG connector 16 by the reflector 63 integrated with the halogen lamp 61.
[0048]
In the illumination light path between the halogen lamp 61 and the LG connector 16, for example, a mesh filter 64 is provided as a light-reducing filter that attenuates the illumination light. The mesh filter 64 is connected to a movable portion (movable), and the mesh filter 64 can be removably driven from the illumination optical path by applying a drive signal to the solenoid 65 by the solenoid drive circuit 66.
[0049]
The dimming signal from the dimming circuit 45 is input to the lamp current setting circuit 67, the lamp current is determined by the dimming signal, and the signal is output to the halogen lamp lighting circuit 62, so that the halogen lamp 61 emits light. The brightness of the illumination light is controlled by controlling the amount.
[0050]
The LG type detection means 49 provided on the LG connector 16 of the light source device 3B detects the type of the LG cable 4, for example, the high-luminance mode compatible LG cable or the normal mode compatible LG cable, and detects the LG type. The means 49 outputs a detection signal to the CPU 68, and the CPU 68 outputs a signal to the solenoid drive circuit 66 in accordance with the detection signal to control its operation.
[0051]
Specifically, when a normal mode-compatible LG cable is detected, a control signal to be driven by the CPU 68 is not input to the solenoid drive circuit 66, and the mesh filter 64 remains in the optical path and is reduced by the mesh filter 64. It is illuminated and corresponds to the normal mode.
[0052]
On the other hand, when the LG cable corresponding to the high luminance mode is detected, a control signal to be driven is output from the CPU 68 to the solenoid drive circuit 66. Therefore, the suction drive signal flows to the solenoid drive circuit 66 and the mesh filter 64 is passed through. The light is retracted from the optical path to the outside of the optical path, and corresponds to the high luminance mode.
[0053]
The dimming signal input to the dimming signal input connector 42 is input to the dimming circuit 45 through the CCU connection detection circuit 69.
As shown in FIG. 6, the CCU connection detection circuit 69 detects and detects a dimming signal. The dimming signal shown in FIG. 7A, which has been subjected to pulse width modulation, is transmitted through a signal line 41a. a is applied to a trigger input terminal A of a retriggerable one-shot multivibrator (hereinafter abbreviated as OSM) 71 constituting the CCU connection detection circuit 69.
[0054]
The OSM 71 is connected to a resistor R3 and a capacitor C1 for setting a pulse width to be output. The pulse width is set longer than the maximum period of the pulse modulation. FIG. When the dimming signal shown is input, one shot is continuously output, and in this case, an “H” level detection signal is output.
[0055]
The pulse-modulated dimming signal is input to the operational amplifier 73 constituting the integrating circuit 72 in the CCU connection detecting circuit 69 via the resistor R4, connected to the input end and the output end, and integrated by the capacitor C2. The light control signal shown in FIG. 7B can be obtained by averaging the pulses of the light control signal.
[0056]
The detection signal of the CCU connection detection circuit 69 is input to the CPU 68, and the insertion / removal of the mesh filter 64 into the illumination optical path is controlled via the solenoid drive circuit 66 depending on whether the CCU 12 is connected. Other configurations are the same as those in FIG.
[0057]
The operation of the second embodiment configured as described above will be described.
When a general CCU (not shown) is connected, a video signal is input to the video signal input connector 46 of the light source device 3B. In this case, since nothing is connected to the dimming signal input connector 42, the connection of the dedicated CCU 12 is not detected by the CCU connection detecting means 69, and the mesh filter 64 remains interposed in the optical path. Accordingly, in this state, the emission light amount of the illumination light emitted from the light source device 3B is attenuated by the mesh filter 64 and becomes a normal mode in which only a half light amount of the maximum light amount is emitted.
[0058]
When the CCU 12 is connected, the CCU connection detection unit 69 detects the dimming signal pulse and detects that the CCU 12 is connected.
Since the detection signal from the CCU connection detection means 69 is determined as the dedicated CCU 12 by the CPU 68, the solenoid drive circuit 66 is driven and the proximal end of the mesh filter 64 is sucked and retreated from the optical path. Without being limited, it operates in a high luminance mode in which dimming control is performed (provided that the connected LG cable 4 is for the high luminance mode).
[0059]
In this case, when the connected LG cable 4 is for the normal mode, the CPU 68 maintains the state in which the mesh filter 64 is interposed in the optical path and operates in the normal mode.
The present embodiment has substantially the same effect as the first embodiment.
[0060]
In addition, in the state where the general CCU is connected to the light source device 3A or 3B, it is limited to about ½ of the maximum emitted light amount, but not limited to this value, for example, a range of 40-60% of the maximum emitted light amount It may be set within.
[0061]
The dedicated CCU 12 used in the first and second embodiments is a CCU capable of detecting connection. However, in the case of a general CCU that does not use the element shutter system, the video signal input connector 46 is used for adjustment. Although light is possible, since connection to the dimming signal input connector 42 is not possible, connection detection is not performed, and use is performed in a state where the amount of emitted light is limited (normal mode).
[0062]
Although the halogen lamp 61 is used in FIG. 5 as a light source lamp for generating illumination light, the discharge lamp 17 as in the first embodiment may be used.
Note that some lamps cannot change the current, and in that case, it is possible to apply dimming control using a diaphragm.
[0063]
[Appendix]
1. A video signal processing device that is built in or attached to an endoscope and that processes an imaging signal of an imaging device that captures an endoscopic image, and an endoscope that emits illumination light for obtaining an endoscopic image can be connected. In the endoscope light source device,
An endoscope light source device comprising: a detection unit that detects a type of a video signal processing device; and a light amount control unit that controls a maximum emitted light amount based on a detection result of the detection unit.
[0064]
2. In Supplementary Note 1, when connection of the video signal processing device is not detected in the detection by the detection means, the maximum amount of light emitted from the endoscope light source device is controlled.
3. In Supplementary Note 1, the control of the maximum amount of light emitted from the endoscope light source device is about ½.
4). In Supplementary Note 1, the control of the maximum amount of light emitted from the endoscope light source device is in the range of 40 to 60%.
[0065]
5. In Supplementary Note 1, the detection means detects formation of a connection circuit.
6). In Supplementary Note 1, the detection means detects a dimming signal.
7). In Supplementary Note 1, the control of the maximum emitted light amount from the endoscope light source device is controlled by the light beam stop.
[0066]
8). In Supplementary Note 1, the maximum amount of light emitted from the endoscope light source device is controlled by a neutral density filter.
9. In Supplementary Note 1, the detection means includes a first video signal processing device that outputs a signal that adjusts the amount of light emitted by the endoscope light source device from an image pickup signal of the image pickup device, and a display means based on the image pickup signal of the image pickup device. The type of the second video signal processing apparatus that performs the element shutter type process of adjusting the brightness of the video signal output to the image sensor by variable control of the imaging time is detected.
[0067]
10. A connector in which a light guiding means for transmitting illumination light to an object to be observed can be inserted and removed;
A light source lamp that generates illumination light that can be incident on an incident end face of the light guiding means inserted into the connector;
Discriminating means for discriminating the type of the light guiding means inserted into the connector;
Maximum light amount setting means for setting a maximum allowable light amount of illumination light supplied from the light source lamp to the incident end face of the light guide means based on the determination result of the determination means;
An endoscope light source device comprising:
[0068]
11. A light source lamp that generates illumination light;
A light guide means capable of transmitting the illumination light from the light source lamp to an observation target;
Imaging means for imaging the object to be observed;
A connector capable of connecting an output end of a signal processing means for processing an imaging signal from the imaging means;
Discriminating means for discriminating the type of the signal processing means connected to the connector;
A maximum light amount setting means for setting a maximum allowable light amount of illumination light supplied from the light source lamp to the light guide means based on a determination result of the determination means;
An endoscope light source device comprising:
[0069]
【The invention's effect】
As explained above, according to the present invention, ,seed When video signal processing apparatuses of different types are connected, adverse effects such as changing the state of the living tissue with the heat of the emitted illumination light can be prevented, and a state that is easy to diagnose can be maintained.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an external appearance of an endoscope light source device according to a first embodiment of the present invention.
FIG. 2 is a configuration diagram showing an internal configuration of an endoscope light source device and the like.
FIG. 3 is a circuit diagram showing a specific circuit configuration of a CCU connection detection circuit.
FIG. 4 is a diagram showing an operation mode depending on the type of LG cable detected by the LG type detection unit;
FIG. 5 is a configuration diagram showing an internal configuration of an endoscope light source device and the like according to a second embodiment of the present invention.
FIG. 6 is a circuit diagram showing a specific circuit configuration of a CCU connection detection circuit.
FIG. 7 is an operation explanatory diagram of a CCU connection detection circuit.
[Explanation of symbols]
1B: Endoscopic device
2 ... Rigid endoscope
3A ... Light source device
4 ... LG cable
5 ... Insertion section
6 ... gripping part
7 ... Eyepiece
11 ... TV camera
12 ... CCU
13 ... Monitor
15 ... LG connector receptacle
16 ... LG connector
17 ... Discharge lamp
18 ... Lamp lighting circuit
21, 26 ... Light guide
22 ... Aperture
25. Aperture drive circuit
27 ... Objective lens
33 ... CCD
37 ... Video signal processing circuit
38. Dimming signal output circuit
40: Dimming signal output connector
41 ... Dimmable cable
42. Dimming signal input connector
43 ... CCU connection detection circuit
45. Light control circuit
47. Control circuit
48. Aperture operation limiting circuit
49. LG cable type detection means

Claims (1)

An endoscope light source device that generates illumination light for obtaining an endoscopic image,
A first light control signal output circuit that processes an image pickup signal from a first image pickup device that picks up an endoscopic image and outputs a light control signal adaptable to the light source device based on the image pickup signal. A video signal processing device;
A dimming process that picks up an endoscopic image, processes an imaging signal from a second imaging apparatus different from the first imaging apparatus, and outputs a dimming signal adaptable to the light source apparatus based on the imaging signal. A second video signal processing device having no optical signal output circuit;
In an endoscope light source device that can connect either one of
The maximum emitted light amount of illumination light that can be generated when the second video signal processing device is connected to the maximum emitted light amount of illumination light that can be generated when the first video signal processing device is connected. An endoscope light source device comprising an emitted light quantity setting means for setting a small value .

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