JP3514817B2 - Endoscope imaging device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [0001] BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a solid-state device using a CCD or the like.
Equipped with an imaging device to capture an endoscopic image and obtain a video signal
The present invention relates to an endoscope imaging device. [0002] 2. Description of the Related Art Inserting an elongated insertion portion into a body cavity
Therefore, the target part deep inside the body cavity without the need for incision
Observe the position and treat as needed using a treatment tool
Endoscopes that can be used are widely used. Recently, CC
Electronic endoscope and optical type equipped with solid-state imaging device using D etc.
Use an endoscope equipped with an external TV camera, etc.
To obtain a video signal of the subject image and display the image on a monitor, etc.
Electronic endoscope devices for displaying are being used. In an electronic endoscope apparatus used in the medical field, other
A part that directly touches the patient and the surgeon, similar to electronic medical devices
Is for medical safety to prevent electric shock etc. due to leakage current.
Measures have been taken. That is, it is directly connected to commercial power.
Through the primary circuit, the primary circuit and the isolation transformer for the power supply
Primary circuit and secondary circuit in addition to the secondary circuit configured
Satisfies the specified breakdown voltage and leakage current standards
Solid-state imaging provided with a patient circuit such as
The electronic circuit of the device etc. is configured with a patient circuit
You. In the vicinity of such parts that may touch the patient
Circuits such as the imaging unit of the electronic endoscope provided
Provide sufficient creepage space for the outer surface to prevent a large diameter
The patient circuit must be separated from the secondary circuit
is there. The patient circuit includes a signal line, a ground, etc.
Have a structure electrically insulated from the secondary circuit.
Of the electronic circuits in the electronic endoscope device, the secondary circuit
Normally, the ground is connected to the housing, etc.
In some cases. On the other hand, the patient circuit
Is grounded separately from the secondary circuit.
It is in a floating state. Also, a patient circuit-secondary circuit
An isolation element is provided between the power supply and signal line.
And so on to insulate between the patient circuit and the secondary circuit
are doing. Digital isolation elements
For signal lines, photocouplers etc. are used as analog signal lines.
For example, a pulse transformer or the like is used. [0005] Endoscope imaging as an imaging unit of an electronic endoscope apparatus
FIG. 8 shows a configuration example of the device. An electronic endoscope having a CCD 51 or an external endoscope
Camera control unit for TV camera to process video signal
It is connected to a knit (hereinafter, referred to as CCU) 52.
The CCU 52 has a CCD driver for driving the CCD 51.
53, various timing patterns supplied to the CCD driver 53
Timing generator 54 for generating a pulse, CCD 5
Preamplifier 5 for amplifying output signal (CCD OUT) of 1
5. CDS (correlation double support) for the output signal of the CCD 51
Pre-processing circuit 56 for performing pre-processing such as sampling).
Are provided, and the output signal of the CCD 51 is subjected to signal processing.
The video signal is output to the TV monitor 57 and
Endoscope image is displayed. [0007] The circuit in the CCU 52 includes a secondary circuit part.
And a part of the patient circuit.
In between, the photocoupler 58 and the pulse transformer 59
Patient circuit-secondary circuit provided with isolation element
Insulated between them. Also, the secondary circuit and the patient circuit are
The land is separate, and the patient circuit is
It is in a floating state. The timing generator 54 has a horizontal synchronization
Signal (HD), vertical synchronization signal (VD), and clock
(CLK), the horizontal transfer clocks φH1, φH2,
Set pulse φR, vertical transfer clock φV1, φV2, φV
3. Generate φV4 and send it to the CCD driver 53. Ma
In addition, the timing generator 54 controls the driving and communication of the CCD.
The timing pulse is sent to the video signal to synchronize with the signal processing.
It is also sent to the signal processing circuit. For this reason,
In the conventional configuration, it is provided at the tip of the endoscope, etc.
CCD 51 that may be
The CD driver 53 is provided on the patient circuit side,
Generator 54 and pre-processing circuit 56 are on the secondary circuit side
It is provided in. Therefore, the secondary circuit and the patient circuit are separated.
In order to separate them, a flash is generated at each timing pulse for driving the CCD.
7 photocouplers 58, pulsed for CCD output signal
A total of eight isolation elements are provided with one lance 59.
It is configured to be installed. [0009] As described above, as described above,
In the above configuration, the timing pulse for driving the CCD is
CCD driver of the patient circuit via the isolation element
To the patient circuit and secondary
The number of signals transmitted to and from the circuit is large,
Many isolation elements are needed to insulate the circuit.
I was For this reason, EMC (electro-magnetic compa
tibility) Problems that are disadvantageous in measures and many parts
And the cost of the equipment increases.
Was. The present invention has been made in view of these circumstances.
To reduce the number of signals transmitted between the patient circuit and the secondary circuit.
Device with a patient circuit at low cost
To provide an endoscope imaging device capable of performing
And [0011] SUMMARY OF THE INVENTION An endoscope imaging apparatus according to the present invention.
Is detachably connected to the first optical endoscope.
1 endoscope is arranged so as to obtain a predetermined pressure resistance.
Head unit having first solid-state imaging device
To the first solid-state imaging device.
Having a secondary circuit including signal processing means capable of signal processing of the child
A video signal processing device, and
Clock generating means for generating a constant reference clock signal;
The clock generation means is configured in the secondary circuit.
Generates a synchronization signal based on the generated clock signal
Having a possible synchronizing signal generating means and a second solid-state imaging device
Detachably attached to the second endoscope and the video signal processing device.
Connectable, wherein the second solid-state imaging device is connected
Relay adapter having a patient circuit, and the relay adapter
The clock generation means and the synchronization signal generation
The clock signal and the synchronization signal generated by the generating means
A first isolation element capable of transmitting a signal to the patient circuit
A child, configured in the patient circuit of the relay adapter,
The secondary circuit is provided by the first isolation element.
Based on the clock signal and the synchronization signal transmitted from the
A tie for driving the second solid-state imaging device.
Timing generating means for generating a timing pulse;
Based on the timing pulse from the
Outputting a drive signal to the second solid-state imaging device.
A driving means provided in the patient circuit;SecondSolid shooting
An imaging signal output from the imaging device to the patient circuit is transmitted to the imaging circuit.
Transmitting the signal to the secondary circuit of the image signal processing device;
A second isolation element provided in the adapter.
It is provided. [0012] The first timing trigger provided on the patient circuit side is provided.
The drive timing pulse is generated by the
The body imaging device is driven. Along with this, it is provided on the secondary circuit side
Processing by the second timing generator
Generating a timing pulse for the output of the solid-state imaging device.
Performs signal processing on the signal. [0013] Embodiments of the present invention will be described below with reference to the drawings.
I do.Prior to the description of the embodiments,
An endoscope imaging device related to the example will be described. Figure 1
It is a first reference example related to the present embodiment.Of endoscope imaging device
FIG. 3 is a block diagram illustrating a configuration of a main part. [0014] The endoscope image pickup device is a device for inserting an electronic endoscope.
An external TV attached to the end or the eyepiece of an optical endoscope
A CCD 1 as a solid-state imaging device provided in a camera;
Connected to this CCD1, driving of CCD1 and video signal
Camera control as video signal processing device for processing
The main part is configured with the CCU 2
Video signal as an output signal from CCU2
Images can be displayed and recorded on a monitor, etc.
ing. The CCU 2 has a second internal circuit in the internal circuit.
The road and the secondary circuit are insulated from the secondary circuit.
Structured to sufficiently meet the specified withstand voltage and leakage current standards
And a part of the patient circuit. Patient circuit and secondary
The ground is separate from the circuit, and the patient circuit is
It is floating on the road. Patient times like this
By providing a passage, patients such as the insertion part of the electronic endoscope
Leakage current can be prevented at the part that directly touches the surgeon,
To prevent the risk of electric shock due to leakage current
Can be On the patient circuit side, a drive for driving the CCD 1
CCD driver 3 for outputting pulses and CCD driver
3 for generating a drive timing pulse to be supplied to
Timing generator (1) 4 and CCD1 output signal
(CCD OUT) is provided with a preamplifier 5
I have. Signals related to video signal processing are sent to the secondary circuit side.
Timing for generating signal processing timing pulse
Generator (2) 6 and Timing Generator (1) 4
Horizontal synchronizing signal (HD) and vertical synchronizing signal (V
D) standard signal generation circuit (SSG, Standard s)
ignal generator) 7 and noise of the output signal of CCD1
Circuit (correlation double sampling circuit) 8 for removing noise
And a video signal processing circuit 9 for performing various video signal processing;
Supply to timing generator (1) 4 and SSG7
Oscillator for Generating Synchronous Clock (CLK)
(CXO) 10 is provided, and the endoscope is taken by the CCD 1
A video signal of a mirror image is output from the video signal processing circuit 9
It has become. Between the patient circuit and the secondary circuit, there are three
Provided with isolation elements 11a, 11b, 11c.
The patient circuit and the secondary circuit are insulated and electrically isolated.
It has a structured structure. That is, the crystal oscillator 10 is
Clock CLK between the imming generator (1) 4
Signal lines are isolated by photocouplers
Is connected via the terminal 11a, and is connected to the SSG 7 and the timing generator.
Horizontal synchronizing signal HD and vertical synchronizing signal
The signal line of the signal VD is
Connected through a preamplifier 5
Of the CCD output signal (CCD OUT) with the CDS circuit 8
Signal line is isolated by pulse transformer
Connected through the element 11c, and connected to each signal line.
In such a case, signal transmission is performed. When the CCU 2 operates, the crystal oscillator 10
The clock CLK is sent to the SSG 7 and the clock CLK
The horizontal synchronizing signal HD and the vertical synchronizing signal VD synchronized with
Is done. The horizontal synchronizing signal HD from the SSG 7 and the vertical
The direct synchronization signal VD and the clock CL from the crystal oscillator 10
K and the isolation elements 11a and 11b, respectively.
To the patient circuit timing generator (1) 4
Horizontal transfer clock φH1, φH2, vertical transfer clock
Drive of φV1, φV2, φV3, φV4, reset pulse φR, etc.
A pulse is generated. These drive pulses are applied to the CCD driver.
Input to the CCD 1 via the inverter 3 and
Photoelectric conversion of the subject image is performed. The output signal of the CCD 1 (CCD OUT) is
After being amplified by the re-amplifier 5, the isolation element 11
c to the CDS circuit 8 and the video signal processing circuit
9 processed by NTSC, PAL, etc.
Converted to a signal. At this time, the timing
In the generator (2) 6, the horizontal synchronizing signal H of the SSG 7 is output.
Timing pulse synchronized with D and vertical synchronization signal VD, etc.
Is generated, and the CDS times are synchronized with this timing pulse.
The path 8 and the video signal processing circuit 9 operate to output the CCD 1
Signal sampling etc. are performed,
Video signal processing is performed in accordance with the driving of the CCD. As described above, the patient circuit side and the secondary circuit side
By providing a timing generator for each
The signal transmitted between the patient circuit and the secondary circuit.
Clock, horizontal and vertical synchronization signals, CCD output signal
Signal transmission between the patient circuit and the secondary circuit
The number of lines can be reduced. Therefore, the bookreference
An exampleAccording to the configuration of (1), the electrode for insulating the patient circuit and the secondary circuit is
The number of isolation elements can be reduced to a minimum.
The cost of an endoscopic imaging device with a patient circuit
Thus, an inexpensive configuration can be achieved. Also, the patient circuit
Since the number of signals transmitted to and from the secondary circuit is reduced,
EMI (electro-magnetic
 interference), which is advantageous for EMC measures
Configuration. FIG.Of the second reference exampleMain endoscope imaging device
FIG. 3 is a block diagram illustrating a configuration of a main part. SecondReference exampleDisconnects the patient circuit and the secondary circuit.
Configuration example with further reduced isolation elements
It is. SecondReference exampleCCU 20 of the firstReference exampleWhen
Similarly, the timings on the patient circuit side and the secondary circuit side respectively
Generator (1) 4, Timing generator (2) 6
It is provided and configured. On the patient circuit side,
The patient circuit based on the vertical synchronization signal VD from the SSG7 of the next circuit
A second SSG 21 for generating a horizontal synchronizing signal HD 'on the road side
And the horizontal synchronization signal HD generated by the secondary circuit SSG7.
And the horizontal synchronizing signal HD generated by the SSG 21 of the patient circuit
 'And a PLL circuit 22 for synchronizing the phase
Voltage controlled crystal generator for generating a clock based on the output of the path 22
A shaker (VCXO) 23 is provided.
Is input to the SSG 21 and synchronized with this clock.
The desired horizontal synchronizing signal HD 'is generated.
You. In the configuration in which synchronization means is provided on the patient circuit side,
From the timing generator on the patient circuit side (1) 4 and 2
Synchronization with the timing generator (2) 6 on the next circuit side
And the vertical synchronizing signal V
D and the horizontal synchronizing signal HD 'are supplied to drive the CCD.
Ruth is generated. SecondReference exampleSo two isolations
Elements 24a and 24b are provided, between the patient circuit and the secondary circuit.
Are electrically isolated from each other. That is, S
SG7 and timing generator (1) 4, SSG21,
Horizontal synchronization signal HD and vertical synchronization with the PLL circuit 22
The signal line of the signal VD is
Connected via a preamplifier 5
Of the CCD output signal (CCD OUT) with the CDS circuit 8
Signal line is isolated by pulse transformer
Connected through the element 24b, and connected to each signal line.
In such a case, signal transmission is performed. Other parts are the firstReference exampleWith the same configuration as
Yes, description is omitted. SecondReference exampleIn the configuration, the patient circuit-next time
The signals transmitted between the roads are a horizontal synchronization signal HD and a vertical synchronization signal.
Period signal VD and the CCD output signal (CCD OUT) only.
FirstReference exampleThe transmission line of the clock CLK at
Omitting and further reducing the number of isolation elements
It has a configuration. During operation of the CCU 20, the crystal oscillator 10
The clock CLK is sent only to the secondary circuit SSG7.
The horizontal synchronizing signal HD generated by the SSG 7 and the vertical synchronizing signal
Phase signal VD is transmitted to the patient via the isolation element 24a.
Transmitted to the circuit. The vertical synchronizing signal VD is the patient circuit timer.
Imming generator (1) 4 sent to SSG 21 and S
At SG21, a horizontal synchronizing signal HD 'is generated. Secondary circuit
Is transmitted to the PLL circuit 22.
The phase synchronization with the horizontal synchronizing signal HD 'from the SSG 21 is
Be taken. VCXO2 based on the output of the PLL circuit 22
The clock generated in step 3 is fed back to SSG21
And the horizontal synchronizing signal HD 'of the output of the SSG 21 and the second
The phase of the horizontal synchronization signal HD from the road is synchronized. The timing generator (1) 4 includes
The vertical synchronization signal VD and the horizontal synchronization signal H output from the SSG 21
D ′ are supplied to the horizontal transfer clock and vertical transfer clock.
A drive pulse such as a pulse is generated. On the other hand, the secondary circuit tie
Mining generator (2) 6
Input signal HD and the vertical synchronizing signal VD,
A timing pulse for processing is generated. here,
Timing generator for patient circuit (1)
The timing generator (2) 6 is the PLL times described above.
Are synchronized by the path 22 and the VCXO 23,
Without transmitting the clock from the next circuit to the patient circuit
Are operable in synchronization with each other. SecondReference exampleAccording to the configuration of the above, the patient circuit and 2
The signals transmitted to and from the next circuit are defined as horizontal and vertical synchronization signals.
Only three systems of CCD output signals can be used.three
ExampleSignal transmission line between patient circuit and secondary circuit compared to
Patient circuit and secondary circuit
Further reduce the number of isolation elements that insulate
be able to. Next,Referring to FIG.CCU patient circuit
To be installed outsideAccording to one embodiment of the present inventionIntrospection
Mirror imaging deviceWill be described. The aboveReference exampleThen, the secondary circuit in the CCU
It has a configuration with a patient circuit.
A circuit consisting of only a secondary circuit without a circuit
An external TV camera and an imaging device at the tip
An electronic endoscope that needs to be composed of a patient circuit and one C
It can be made connectable to a CU. In the field of surgery, rigid endoscopes and procedures
Insert the tool into the abdominal cavity, and perform the procedure while observing with an endoscope.
Laparoscopic surgery is performed by cholecystectomy, etc.
You. An endoscope imaging device used for such a surgical operation and
The external TV camera is attached to the eyepiece near the optical rigid endoscope.
With video rigid endoscope, which is an electronic endoscope
It is thought that it was. External TV camera to optical rigid endoscope
In the configuration with the camera attached, the detachable part of the external TV camera
And meet the specified withstand voltage and leakage current standards.
Set the wall thickness so that creepage space can be taken
The circuit in the external TV camera is configured with a secondary circuit
As a result, an isolation structure is not required. one
On the other hand, video rigid endoscopes are flexible
Equipped with an image pickup device using a CCD or the like at the tip like the endoscope
It is necessary to take a sufficient creepage distance in consideration of medical safety.
Because the insertion part becomes extremely large in diameter, the imaging device
It is necessary to configure such a circuit as a patient circuit. Therefore, as shown in FIG.
U31 is composed of only a secondary circuit having no patient circuit,
Patient circuit block on the patient circuit side including the isolation element
The hook 32 is provided outside and can be attached to and detached from the CCU 31.
By doing, the external TV camera composed of the secondary circuit
Connected to the CCU 31 and has a patient circuit.
To control the video rigid endoscope. The CCU 31 has only a secondary circuit part.
Clock and horizontal synchronization signal for driving CCD1
Signal HD and the vertical synchronizing signal VD, and the CCD
1 output signal by a video signal processing circuit (not shown)
And convert it to a video signal. Secondary circuit
The crystal oscillator 10, SSG 7, and CDS circuit 8 on the side of FIG.
FirstReference exampleAs well as isolation elements
11a, 11b, 11c connected to the patient circuit side
ing. The CCD 1 provided on the video rigid endoscope is used for patient rotation.
Drive pulse from the CCD driver 3 of the road block 32.
The subject image is photoelectrically converted and the output signal is stored in the buffer 33.
To the preamplifier 5 of the patient circuit block 32
It has become. FIG. 4 shows the patient circuit block 32 outside the CCU.
1 shows a first example disposed in a section. The first example is an endoscope body
In a disposable rigid disposable mirror
is there. Video rigid endoscope 35 for CCD with CCD1
Is at the end of the signal cable 36 connected to the CCU 31,
Card edge type with contact points formed on a flat connection
A connector 37 is provided, and internal electronic
The circuit is a patient circuit. The connector 37 includes:
An adapter 38 as a relay means is connected, and this adapter
The video rigid endoscope 35 is connected to the CCU 31 through the
Configuration. The relay adapter 38 is formed in a waterproof structure.
It is intended for repeated use and is used internally.
Is provided with the patient circuit block 32 shown in FIG.
You. Therefore, the patient circuit and the secondary
The isolation structure with the circuit
The formed video rigid endoscope 35 is composed of only a secondary circuit.
Connectable to CCU31, video rigidity by CCU31
The mirror 35 can be controlled. Also, in this configuration,
The relay adapter 38 provided with the patient circuit block 32
Disposable (discs)
The cost of the portion (p) can be reduced. further,
Isolation structure described aboveReference exampleCompared to the tip
Because it can be placed closer to the CCD side,
An advantageous configuration can be provided. FIG. 5 shows the patient circuit block 32 outside the CCU.
5 shows a second example disposed in a section. The second example is repeated use
This is an example in which the present invention is applied to a reusable rigid endoscope. CCD
The reusable video rigid mirror 41 provided with
Connected to the CCU 31 via the bull 42
Image signal processing of the subject image picked up in 41 by the CCU 31
And the endoscope image can be displayed on the monitor 34
I have. A grip on the base end side of the insertion portion of the video rigid endoscope 41
The operation circuit 43 also serves as a patient circuit shown in FIG.
A block 32 is provided. Therefore, this operation unit 4
In 3 the isolation structure between the patient circuit and the secondary circuit
And the distal end side from the operation unit 43 is the patient circuit,
The signal cable 42 and the like of the
The video rigid mirror 41 having a path is composed of only a secondary circuit.
Can be connected to the CCU 31
The sex mirror 41 can be controlled. FIG. 6 shows the patient circuit block 32 outside the CCU.
5 shows a third example arranged in a section. The third example is the second example
Also applied to a reusable rigid endoscope that is used repeatedly
It is an example. Reusable video rigid endoscope with CCD1
45 is a connector for CCU connection at the end of the signal cable 46.
A rectifier 47 is provided. FIG. 3 shows the inside of the connector 47.
A patient circuit block 32 is provided. Therefore,
Of the patient circuit and the secondary circuit at the connector 47 of FIG.
And the distal end side of the connector 47 is affected.
Circuit, after patient circuit block 32 in connector 47
The contact part on the step side is a secondary circuit and has a patient circuit.
Video rigid endoscope 45 with a CC composed only of a secondary circuit
Can be connected to U31, and video rigid endoscope 4
5 can be controlled. On the other hand, endoscope imaging using an optical rigid endoscope
In the case of the device, as shown in FIG.
The camera head of the external TV camera 62 is attached to the
Connect the signal cable 63 of the V camera 62 to the CCU 31
Configuration. In this case, a camera attached to and detached from the rigid endoscope 61
The head is designed to have a predetermined pressure resistance at the head end 64.
By setting the thickness and ensuring sufficient creepage space, external
The circuits in the TV camera 62 include patient circuits and isolation
The structure can be unnecessary, and the patient circuit block 32
Can be configured with only a secondary circuit without providing
You. Therefore, it is directly connected to the CCU 31 composed of the secondary circuit.
The external TV camera 62 can be controlled by the CCU 31
Noh. In this case, there is no patient circuit.
Configuration can be simplified by eliminating unnecessary patient circuits.
In both cases, a device that is resistant to noise such as EMI
And deterioration of image quality can be prevented. As described above, including the isolation element
The patient circuit block 32 on the patient circuit side outside the CCU 31
To be detachable from the CCU 31
Therefore, by the CCU of only the secondary circuit without the patient circuit
Consists of a video rigid endoscope with a patient circuit and a secondary circuit
It is possible to control both external TV cameras.
In addition, it can be configured to be relatively strong against noise.
You. The present embodiment is not limited to a rigid endoscope,
Also applies to flexible endoscopes with flexible sections
can do. [Appendix] As described in detail above, the present invention
According to the aspect, the following configuration can be obtained.
That is, (1) The endoscope and the inside or outside of the endoscope body
A solid-state imaging device provided for capturing an image by an endoscope;
Operation control of the solid-state imaging device connected to the solid-state imaging device
And signal processing of an output signal obtained by the solid-state imaging device.
And an endoscope imaging device having a video signal processing device.
So that the specified withstand voltage can be obtained for the secondary circuit.
Provided on the patient circuit side including the solid-state imaging device
Driving timing pal for driving the solid-state imaging device
A first timing generator for generating a
Provided on the next circuit side, for controlling the output signal of the solid-state imaging device.
Signal processing timing pulse for performing signal processing
And a second timing generator that generates
An endoscope imaging apparatus characterized in that: (2) The solid-state image pickup device is the endoscope
Characterized in that it is arranged in the tip of the insertion part of the main body,
The endoscope imaging device according to supplementary note (1). (3) The solid-state imaging device is the endoscope
It can be installed inside an external TV camera attached to the main unit.
The endoscope imaging apparatus according to the above (1), wherein
Place. (4) The endoscope and the inside of the endoscope main body
A solid-state imaging device provided for capturing an image by an endoscope;
Operation control of the solid-state imaging device connected to the solid-state imaging device
And signal processing of an output signal obtained by the solid-state imaging device.
And an endoscope imaging device having a video signal processing device.
So that the specified withstand voltage can be obtained for the secondary circuit.
Provided on the patient circuit side including the solid-state imaging device
Driving timing pal for driving the solid-state imaging device
A first timing generator for generating a
The first timing generator provided on the next circuit side;
In synchronization with the output signal of the solid-state imaging device.
Generates signal processing timing pulses for signal processing
And a second timing generator.
An endoscope imaging apparatus characterized by the following. (5) The first timing generator
A video signal processing device disposed inside the video signal processing device.
The endoscope imaging apparatus according to the above supplementary note (4). (6) The first timing generator
Before the endoscope is disposed inside the endoscope body.
The endoscope imaging device according to supplementary note (4). (7) The endoscope body and the video signal processor
Relay means for connecting to the
A timing generator is provided inside the relay means.
The endoscope imaging apparatus according to the above (4), wherein
Place. (8) The secondary circuit has a synchronization clock.
A crystal oscillator that generates a lock and water based on the clock
Standard signal generation circuit for generating flat sync signal and vertical sync signal
And the first clock on the patient circuit side.
The line to be transmitted to the
And the first signal on the patient circuit side.
A line to be transmitted to a
Transmits the output signal of the device to the video signal processing means on the secondary circuit side
Lines and isolation elements
The endoscope imaging apparatus according to the above (1), wherein
Place. (9) The secondary circuit has a synchronization clock.
A crystal oscillator that generates a lock and water based on the clock
Standard signal generation circuit for generating flat sync signal and vertical sync signal
And the patient circuit side has the second circuit side.
Synchronization means to synchronize with the second timing generator
Having the horizontal synchronization signal and the vertical synchronization signal on the patient circuit side.
Transmission line to the first timing generator
And outputting the output signal of the solid-state imaging device to a video signal on the secondary circuit side.
And transmission lines to the signal processing means.
(1), wherein an optional element is provided.
Endoscope imaging device. [0056] According to the present invention, as described above,
To reduce the number of transmission signals between the user circuit and the secondary circuit
And a device having a patient circuit can be configured at low cost.
There is a possible effect.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing a configuration of a main part of an endoscope imaging apparatus according to a first reference example. FIG. 2 is a block diagram showing a main part of an endoscope imaging apparatus according to a second reference example. FIG. 3 is a block diagram showing a configuration of an endoscope imaging apparatus in which a patient circuit is provided outside a CCU according to an embodiment of the present invention; FIG. 5 is a structural explanatory view showing a first example provided outside. FIG. 5 is a structural explanatory view showing a second example where a patient circuit block is provided outside a CCU. FIG. FIG. 7 is an explanatory diagram showing a third example of the arrangement. FIG. 7 is an explanatory diagram showing an example of the configuration of an endoscope imaging apparatus in which an external TV camera is connected to an optical rigid endoscope. Block diagram showing an example of the configuration of an image pickup apparatus [Description of reference numerals] 1 ... CCD 2 ... Camera control unit G (CCU) 3 CCD driver 4 First timing generator (1) 6 Second timing generator (2) 7 Standard signal generation circuit (SSG) 9 Video signal processing circuit 10 Crystal oscillator (CXO) 11a, 11b, 11c ... isolation elements

────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Kotaro Ogasawara 2-43-2 Hatagaya, Shibuya-ku, Tokyo Inside Olympus Optical Co., Ltd. (72) Inventor Shinji Yamashita 2-43-2 Hatagaya, Shibuya-ku, Tokyo O-Limpus Optical Co., Ltd. (72) Inventor Ichiro Funabashi 2-43-2 Hatagaya, Shibuya-ku, Tokyo In-Olympus Optical Industries Co., Ltd. (72) Inventor Masao Uehara 2-43-2, Hatagaya, Shibuya-ku, Tokyo O-Limpus Optical Co., Ltd. (72) Inventor Nobuyuki Sakamoto 2-43-2 Hatagaya, Shibuya-ku, Tokyo O-limpus Optical Co., Ltd. (72) Inventor Hideki Koyanagi 2-43-2, Hatagaya, Shibuya-ku, Tokyo Olympus Optical Co., Ltd. (56) References JP-A-4-292134 (JP, A) JP-A-4-259441 (JP A) Patent flat 3-114432 (JP, A) (58 ) investigated the field (Int.Cl. ^7, DB name) A61B 1/00 - 1/32

Claims (1)

(57) Claims 1. An optical type endoscope is detachably connected to a first endoscope so as to obtain a predetermined pressure resistance with respect to the first endoscope. A video signal processing device which is detachably connectable to a camera head unit having the first solid-state imaging device, and has a secondary circuit including signal processing means capable of processing the first solid-state imaging device; A clock generation means configured in the secondary circuit to generate a predetermined reference clock signal; and a synchronization signal configured in the secondary circuit and based on the clock signal generated by the clock generation means. A synchronizing signal generating means that can be generated, a second endoscope having a second solid-state imaging device, and a detachably connectable to the video signal processing device;
A relay adapter having a patient circuit to which the solid-state imaging device is connected; and a clock signal and the synchronization signal that are provided in the relay adapter and generated by the clock generation unit and the synchronization signal generation unit are transmitted to the patient circuit. A possible first isolation element, configured in the patient circuit of the relay adapter, based on the clock signal and the synchronization signal transmitted from the secondary circuit by the first isolation element; Timing generating means for generating a timing pulse for driving a second solid-state imaging device; and the patient circuit for outputting a drive signal to the second solid-state imaging device based on the timing pulse from the timing generating means. And an imaging signal output from the second solid-state imaging device to the patient circuit. And a second isolation element provided in the relay adapter for transmitting the signal to the secondary circuit of the video signal processing device.