JPH10211166A - Endoscope imaging device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the erroneous using of white ballance adjustment and black ballance adjustment and to miniaturize a device by making a switch for instructing ballance adjustment common. SOLUTION: CCU 5 of an endoscope imaging device 1 detects the pressurizing operation of a ballance adjustment starting switch 25 by CPU 20 and judges white ballance adjustment or black ballance adjustment based on a luminance signal level detected by a luminance signal level detecting circuit 16 at this time, to control a white ballance/black ballance adjusting circuit 17. When the luminance signal level is not lower than a fixed level then, white ballance judging operation is started but when the luminance signal level is not higher than the fixed level, black ballance judging operation is started. Thereby the starting instruction of white balance adjustment and black ballance adjustment is given by one common switch 25.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an endoscope imaging apparatus provided with video signal processing means for processing a video signal of a subject obtained by imaging with an imaging device.

[0002]

2. Description of the Related Art In recent years, endoscopes (scopes or fiberscopes) capable of diagnosing or examining internal organs and the like by inserting a small-diameter insertion portion into a body cavity have been widely used. I have. In addition, not only for medical use but also for industrial use, boilers, machines, chemical plants, etc.
Alternatively, it is used for observing and inspecting an object inside the device. Further, various electronic scopes using a charge-coupled device (CCD) or the like as an image sensor have been used.

An important parameter for detecting an abnormality in an object in diagnosis and inspection using an endoscope is faithful color reproducibility. CC as imaging means
In an endoscope imaging apparatus that obtains an image signal of a subject using an imaging device such as D, the scope or the scope varies depending on factors such as variations in the spectral sensitivity of the CCD and color filters, and differences and variations in the color temperature of the light source used. The reproduced colors of the entire endoscope apparatus vary. Therefore, in order to ensure good color reproducibility without variation, white balance adjustment and black balance adjustment are performed.

In a conventional endoscope imaging apparatus, the white balance adjustment operation is performed by pressing a push button switch for instructing the start of the white balance adjustment operation in a state where a standard white subject is imaged. Also,
In the black balance adjustment operation, the black balance adjustment is performed by pressing a push button switch for instructing the start of a black balance adjustment operation different from the white balance adjustment start push button switch in a state where incident light does not enter the image sensor.

[0005]

However, in the above-mentioned prior art, when the user accidentally presses the black balance adjustment start push button switch despite the intention of white balance adjustment, proper color reproducibility is obtained. The problem that cannot be done occurs. Conversely, if the white balance adjustment start push button switch is erroneously pressed in spite of the intention of black balance adjustment, a problem arises in that appropriate color reproducibility cannot be obtained. Further, separate push button switches for instructing operation start must be provided for each of the white balance adjustment and the black balance adjustment, which limits the miniaturization of the entire apparatus.

The present invention has been made in view of the above circumstances, and it is possible to prevent erroneous use of white balance adjustment and black balance adjustment so as to obtain appropriate color reproducibility and to reduce the size of the apparatus. It is an object to provide a possible endoscope imaging device.

[0007]

According to the present invention, there is provided an endoscope imaging apparatus having a video signal processing means for processing a video signal obtained by an imaging means. Signal level detecting means for detecting, white balance adjusting means for performing white balance adjustment on the video signal, black balance adjusting means for performing black balance adjustment on the video signal, and operations of the white balance adjusting means and black balance adjusting means A common balance adjustment start switch for instructing a start, and an operation instruction by the balance adjustment start switch based on a signal level detected by the signal level detection means when the balance adjustment start switch is operated. And black balance adjustment Determine Re is, and control means for operating said white balance adjusting means or black balance adjustment means, those provided with the.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 5 relate to a first embodiment of the present invention, FIG. 1 is a block diagram showing an entire configuration of an endoscope imaging apparatus, FIG. 2 is a block diagram showing a configuration of a white balance / black balance adjustment circuit, 3 is an explanatory diagram for explaining the operation of the balance adjustment controller at the time of white balance adjustment, FIG. 4 is an explanatory diagram for explaining the operation of the balance adjustment controller at the time of black balance adjustment, and FIG. 5 is a CPU relating to white balance adjustment and black balance adjustment. 5 is a flowchart for explaining the operation of FIG.

As shown in FIG. 1, an endoscope imaging apparatus 1 according to the present embodiment includes a camera head 2 having built-in imaging means, a scope 3 connected to the camera head 2, and an illumination light applied to the scope 3. And a camera control unit (hereinafter abbreviated as CCU) 5 for performing signal processing on image pickup means provided in the camera head 2.
And a TV monitor 6 for displaying a standard video signal processed by the CCU 5.

When the endoscope imaging apparatus 1 is used, a light guide 8 of a scope 3 is attached to the light source device 4 as shown in FIG. The light is condensed by the lens and is incident on the end face of the opposing light guide 8. This illumination light is transmitted to the scope 3 by the light guide 8, and the
The light is emitted forward from the distal end of the scope 3 through the inside, and illuminates a subject such as a body cavity of a patient. The reflected light of the illuminated subject is formed by the scope 3, and the subject image is taken by the imaging means in the camera head 2 through the scope 3.

In the camera head 2, a CCD 7 as an image pickup means is arranged on a focal plane of an image pickup lens.
A subject image is formed on the imaging surface of D7 and photoelectrically converted. The CCD 7 is connected to the CCU 5 via a camera cable 9 in which a CCD drive signal transmission line and a CCD output signal transmission line are inserted.
It is sent to U5 to perform various signal processing. The video signal output from the CCU 5 is sent to the TV monitor 6, and an observation image of the subject is displayed on the TV monitor 6.

A CCD driver circuit 10 is provided in the CCU 5, and a CCD drive signal is supplied from the CCD driver circuit 10 to the CCD 7 via a CCD drive signal transmission line in the camera cable 9, and a signal stored in the CCD 7 is provided. The charge is read. In the CCU 5, a preamplifier circuit 11 and a preprocessing circuit 12 are provided.
The CCD output signal read from the CD 7 is transmitted to the CCU 5 via the CCD output signal transmission line in the camera cable 9, and the preamplifier circuit 11 in the CCU 5 amplifies the loss in the cable transmission, and then performs preprocessing. Input to the circuit 12.

An A / D conversion circuit 13 and a Y / C separation circuit 14 are provided at a subsequent stage of the pre-processing circuit 12, and a CCD output signal inputted to the pre-processing circuit 12 is a CD.
After performing preprocessing such as S (correlated double sampling) and S / H (sample hold), it is input to the A / D conversion circuit 13 and converted into a digital signal. Is entered.

An RGB matrix circuit 15 and a luminance signal level detection circuit 16 are provided at the subsequent stage of the Y / C separation circuit 14, and the digital signals input to the Y / C separation circuit 14 are line-sequentially converted to Y. The signals are separated into three digital signals of CR and CB and input to the RGB matrix circuit 15. Further, only the Y signal (luminance signal) is also input to the luminance signal level detection circuit 16. The Y, CR and CB digital signals input to the RGB matrix circuit 15 are converted into RGB digital signals by the following matrix conversion formula.

[0015]

A white balance / black balance adjustment circuit 17, a digital video processing circuit 19, a D / A conversion circuit 21, and a post-processing circuit 22 are provided at a stage subsequent to the RGB matrix circuit 15, and are converted by the matrix conversion formula. The RGB digital signal is input to a white balance / black balance adjustment circuit 17, where a predetermined balance adjustment is performed, and then a digital image processing circuit 19 performs digital processing such as enhancement processing, γ correction, and character superimposition. D / A conversion circuit 2
1 is input. Then, the digital signal input to the D / A conversion circuit 21 is converted into an analog signal, converted into a standard video signal in the post-processing circuit 22, and output to the TV monitor 6.

A balance value detecting circuit 18 is provided at a stage subsequent to the white balance / black balance adjusting circuit 17, and a signal after predetermined balance adjustment is input to the balance value detecting circuit 18. Further, the CCU 5 is provided with a CPU 20 for controlling the white balance / black balance adjustment circuit 17 and the like, and a font generator 23 for outputting a completion / incomplete display screen of white balance adjustment and black balance adjustment. On the front panel 24, one common balance adjustment start switch 25 is provided, which gives both white balance adjustment and black balance adjustment operation instructions.

FIG. 2 shows the configuration of the white balance / black balance adjustment circuit 17. The white balance / black balance adjustment circuit 17 includes a balance adjustment controller 26 that generates a multiplication coefficient for performing a balance adjustment of the RGB digital signal, and a balance adjustment controller 26.
And a multiplier 27 for multiplying each of the RGB digital signals by a multiplication coefficient output from. RG
The RGB digital signal input from the B matrix circuit 15 is input to the balance adjustment controller 26,
A multiplication coefficient for performing white balance adjustment or black balance adjustment is generated based on each signal level of GB.

FIG. 3 shows the operation of the white balance / black balance adjustment circuit 17 during white balance adjustment. At the time of white balance adjustment, the levels of the RGB digital signals input by the balance adjustment controller 26 are compared, and a multiplication coefficient is set so that the RGB ratio becomes R: G: B = 1: 1: 1 based on the level of the G signal. Generate Then, the multiplier 27 multiplies each of the RGB signals by the multiplication coefficient, and outputs the R'G'B 'signal after white balance adjustment.

FIG. 4 shows the operation of the white balance / black balance adjustment circuit 17 at the time of black balance adjustment. At the time of black balance adjustment, the balance adjustment controller 26 detects the level of the input RGB digital signal, and sends a control signal to the A / D conversion circuit 13 so that each digital signal value becomes 0, thereby performing A / D conversion. Control the reference voltage.

These balance adjustment operations are performed by the CPU 20.
Is controlled by In the present embodiment, the user issues a command to start both white balance adjustment and black balance adjustment using one balance adjustment start switch 25, and the luminance signal level detection circuit 16 detects the luminance signal level in the CPU 20. By determining which balance adjustment start instruction is based on the level of the luminance signal and controlling the white balance / black balance adjustment circuit 17, appropriate balance adjustment can be performed. At this time, the white balance adjustment jig is attached at the time of white balance adjustment, and the black balance adjustment jig is attached to the distal end of the scope 3 at the time of black balance adjustment. Make adjustments.

CPU for white balance adjustment and black balance adjustment based on the flowchart of FIG.
20 will be described.

The CPU 20 monitors the balance adjustment start switch 25 on the front panel 24 in step S1. When the balance adjustment start switch 25 is turned on, the process proceeds to step S2, and it is determined whether the balance adjustment is white balance adjustment or black balance adjustment based on the level of the luminance signal detected by the luminance signal level detection circuit 16. .

In step S2, the level of the luminance signal is 5
If it is equal to or less than IRE, it is determined that the instruction is a start instruction of the black balance adjustment operation, and the process proceeds to step S3. On the other hand, if the level of the luminance signal is 50 IRE or more, it is determined that the instruction is a start instruction of the white balance adjustment operation, and the process proceeds to step S4. If the level of the luminance signal is equal to or more than 5 IRE and equal to or less than 50 IRE, it is determined that the balance adjustment operation is not appropriate, and the process proceeds to step S5.

In step S4, the white balance / black balance adjustment circuit 17 performs the white balance adjustment operation shown in FIG. 3, and then proceeds to step S6. In step S6, it is determined whether the white balance adjustment is appropriate based on the ratio of the RGB digital signals detected by the balance value detection circuit 18. In step S6, the ratio of the RGB digital signals is R: G: B =
When it is confirmed that the ratio is 1: 1: 1, step S8 is performed.
The process proceeds to step S9 if R: G: B is not 1: 1: 1: 1.

In step S8, the CPU 20 outputs a white balance completion signal to the font generator 23, outputs a white balance completion display screen stored in the font generator 23, and superimposes it on the video signal in the digital video processing circuit 19. , On the screen of the TV monitor 6. In step S9, a white balance incomplete display screen is superimposed on the video signal and displayed on the screen of the TV monitor 6, as in step S8, and the process returns to step S1.

In step S3, the white balance / black balance adjustment circuit 17 performs the black balance adjustment operation shown in FIG. 4, and then proceeds to step S7. In step S7, it is determined whether or not the black balance adjustment is appropriate based on the respective signal levels of the RGB digital signals detected by the balance value detection circuit 18. In step S7, if it is confirmed that the respective signal levels of the RGB digital signals are 0, the process proceeds to step S11, and if not, the process proceeds to step S10.

In step S11, the CPU 20 outputs a black balance completion signal to the font generator 23, outputs a black balance completion display screen stored in the font generator 23, and superimposes it on the video signal in the digital video processing circuit 19. , TV monitor 6
Output on the screen. In step S10, step S
As in the case of 11, the black balance incomplete display screen is superimposed on the video signal and displayed on the screen of the TV monitor 6, and the process returns to step S1.

In step S5, the CPU 20 outputs a balance adjustment impossible signal to the font generator 23,
A digital video processing circuit 1 that outputs a balance adjustment impossible display screen stored in the font generator 23
In step 9, after superimposed on the video signal and output on the screen of the TV monitor 6, the process returns to step S1.

The luminance signal level value for determining the balance adjustment set in step S2 is an example of the setting for explaining the present embodiment, and can be arbitrarily set.

As described above, in the present embodiment, the CPU 2
At 0, it is detected that the balance adjustment start switch 25 has been pressed, and when the luminance signal level of the video signal obtained at this time is equal to or higher than a certain level, the white balance adjustment operation is started and the luminance signal level is detected. The configuration is such that the black balance adjustment operation is started when the level is below a certain level. As a result, it is possible to issue an instruction to start white balance adjustment and black balance adjustment with one common balance adjustment start switch.

Therefore, according to the first embodiment, the white balance adjustment and the black balance are adjusted by determining whether the white balance adjustment operation or the black balance adjustment operation is performed based on the luminance signal level of the captured image. A switch for instructing the start of adjustment can be shared. This makes it possible to prevent user misuse and obtain appropriate color reproducibility, and to reduce the size of the device.

FIGS. 6 to 9 relate to a second embodiment of the present invention. FIG. 6 is a block diagram showing a configuration of an endoscope imaging apparatus. FIG. 7 is an explanatory diagram showing an internal configuration of a video processor.
FIG. 8 is an explanatory diagram showing a configuration of a mounting part of a shield case in a video processor, and FIG. 9 is an explanatory diagram showing a shield structure of an input / output signal path to an isolation member between a patient circuit unit and a signal input unit. .

As shown in FIG. 7, an endoscope imaging apparatus 51 of the present embodiment includes an electronic scope 52, a light source unit 53 for supplying illumination light to the electronic scope 52, and a signal captured by the electronic scope 52. , And a monitor 55 connected to the video processor 54.

The electronic scope 52 has an elongated insertion section 56, and a large-diameter operation section 57 is connected to the rear end of the insertion section 56. A universal cord 58 and a light guide 59 extend laterally from the operation unit 57, and the end of the universal cord 58 is attached to the video processor 5.
4 is provided with a connector 61 that can be connected.

On the distal end side of the insertion portion 56, a rigid distal end portion 62 and a curved portion 63 which can be bent rearward and adjacent to the distal end portion 62 are sequentially provided. The operating section 57 is provided with a bending operation knob (not shown), and by rotating this bending operation knob, the bending section 63 is rotated.
Can be bent vertically and horizontally.

Further, as shown in FIG.
A treatment instrument channel 64 is provided therein, and the operation unit 57 is provided with an insertion port (not shown) communicating with the treatment instrument channel 64. An objective lens 66 and a solid-state image sensor (SI
D) 67 is provided. A light guide 68 for transmitting illumination light is inserted into the insertion section 56.

The light source unit 53 is provided with a white light source 72 such as a xenon lamp. White light emitted from the white light source 72 is condensed by a lens 73, and a frame frequency of a video signal (29.97 Hz in the NTSC system). ) Are sequentially turned into R, G, and B lights by a rotation filter 74 that rotates in synchronization with the light guide 68 and the light distribution lens 6.
The light is radiated through a subject 9 onto a subject 71 such as a body organ to be observed. The rotation of the motor 75 for rotating the rotary filter 74 is controlled by a motor servo circuit 76 so as to be synchronized with the frame frequency of the video signal.

The reflected light from the subject 71 is imaged on an imaging surface of a solid-state imaging device 67 via an objective lens 66, is photoelectrically converted by a read clock signal from a driver 77, and is sequentially converted into R, G, and B signals. Is output.

The driver 77 includes a synchronization signal generator 78.
The SID drive signal from the SID timing signal generator 79 to which the reference clock is input is input via the isolation photocoupler 80. The reference signal is also supplied from the synchronization signal generator 78 to the motor servo circuit 76. As a result, all signals (operations) are phase-synchronized.

R, output from the solid-state image sensor 67,
The G and B sequential signals are amplified by the preamplifier 81 of the video processor 54 and output from the isolation drive circuit 8.
2. The reset noise is removed by a reset noise removing circuit 84 through a high frequency transformer for isolation 83 for protecting the patient from electric shock or the like. Further, unnecessary components are removed by a low-pass filter 85, vertical contour correction is performed by a vertical contour correction circuit 86, and γ correction is performed by a γ correction circuit 87.

The output signal of the gamma correction circuit 87 is A / D
The signal is converted into a digital signal by the converter 88 and stored in the frame memories 89R, 89G, 89B corresponding to the frame sequential illumination.
The signals read out under the respective illumination lights of R, G, and B are stored for one frame. The frame memory 89
The stored signals of R, 89G, and 89B are read out at the same time to become simultaneous signals, and are converted into analog signals by the D / A converter 90, respectively. The A / D converter 88
Conversion speed of each frame memory 89R, 89G, 89B
Writing and reading of data to and from the memory are adjusted by an output signal from the memory control circuit 91.

The analog R, G, and B synchronizing signals output from the D / A converter 90 are supplied to the low-pass filter 9 respectively.
2 removes unnecessary components, and the horizontal contour correction circuit 93
, And is amplified by the output amplifier 94. For example, R, G, B3 having an output impedance of 75Ω
The signal is output from the output terminal to the monitor 55 as a primary color signal.

Further, a luminance signal Y is generated in the Y matrix circuit 96 from the synchronized R, G, B signals subjected to the horizontal contour correction.
In the BY matrix circuit 98, a color difference signal RY is generated from the luminance signal Y and the color signal R, and a color difference signal BY is generated from the luminance signal Y and the color signal B.

The color difference signals RY and BY are converted into subcarriers (3.5795) by encoders 99 and 100, respectively.
45MHz each 90 degree phase difference signal)
The vector is synthesized by the adder 101, and the chrominance signal C
Is generated. This chrominance signal C is multiplexed with the luminance signal Y in the mixed output amplifier 102,
A composite sync signal and a color burst are added, and the NTS
A composite video signal of the C system is generated, and N
Output from the TSC output terminal.

By the way, a patient circuit section 104 constituted by a driver 77, a preamplifier 81 and an isolation drive circuit 82 in the video processor 54.
Are shielded by a shield case 105. Also, a photocoupler 80 as an isolation unit and a signal input / output unit 106 at a later stage, which is isolated from the patient circuit unit 104 by a high-frequency transformer 83, are provided separately from the shield case 105.
7 is a feature of the present embodiment.

The patient circuit section 104 and the signal input / output section 106 in the video processor 54 are mounted, for example, as shown in FIG. A signal line for transmitting an output video signal obtained from the electronic scope 52 is connected to a parent board 112 through a signal line 111 in the video processor 54. A pattern such as a signal line is provided on the parent board 112.
4 are mounted and connected by a connector 113. The signal line 11
1 is connected to one end of a high-frequency transformer 83 mounted on the main board 112 via child boards 114 and 115, and the high-frequency transformer 83 connects the signal line to the patient circuit section 104. Isolation from the signal input / output unit 106 is performed.

On the side of the patient circuit section 104 on the parent board 112, the child board 11 on which the circuit of the signal input / output section 106 is mounted is provided.
6, 117, and 118 are arranged and connected by the connector 113. The signal line of the signal input / output unit 106 connected to the other end of the high-frequency transformer 83
6 to 118 are connected to a signal line 119 extending from the motherboard 112, and the connector 1 is connected via the signal line 119.
The video signal is output to an external peripheral device such as the monitor 55.

In FIG. 7, a photocoupler 80 is mounted on the other side of the high-frequency transformer 83 on the main board 112, and an SID drive signal output from an SID timing signal generator 79 in the signal input / output unit 106 is provided. Is connected to one end of the photocoupler 80, and the signal input / output unit 106 and the patient circuit unit 10 are connected by the photocoupler 80.
4 is isolated. A driver 77 of the patient circuit unit 104 is connected to the other end of the photocoupler 80, an SID drive signal is transmitted to the driver 77 via the photocoupler 80, and the solid-state imaging device 67 built in the electronic scope 52 is driven. You.

Further, the patient circuit section 104 is shielded by a shield case 105 and a signal input / output section 106
, And external noise from outside the video processor 54. Also,
The signal input / output unit 106 is shielded by a shield case 107 so as to prevent clock noise from the SID timing signal generator 79 from radiating outside and jumping into the patient circuit unit 104.

As a shield structure of a conventional endoscope apparatus, Japanese Patent Application Laid-Open Nos. 2-193634 and 4-183 are known.
However, in such a structure, a pattern of an input / output signal path to an isolation member for separating a patient circuit unit and a signal input / output unit is provided on an outer layer of the substrate. Despite shielding the circuits of the patient circuit section and the signal input / output section, radiation and mixing of unnecessary radiation noise occur in the input / output signal path to the isolation member, and the effect of countermeasures against electromagnetic noise is reduced by half. There was a problem that would.

In this embodiment, in order to solve the above-mentioned problem, a parent board 112 is formed as shown in FIG. 8, and the shield cases 105 and 107 are mounted on the parent board 112 by screws. FIG. 9 shows a shield structure of an input / output signal path to the isolation member between the patient circuit unit and the signal input unit.

The parent substrate 112 is composed of a multilayer substrate on which a ground layer 121, a power supply layer 122, and pattern layers 124 and 125 are formed. The pattern layer 124 of the input / output signal path connected to the isolation member composed of the high-frequency transformer 83 and the photocoupler 80 is disposed so as to pass through the inner layer of the substrate, and the ground layer 121 is connected to the shield cases 105 and 107. The patient circuit portion 1 is exposed on the outer surface at the joint portion of the substrate 112 and is exposed.
04 and the outer periphery of the signal input / output unit 106 to the vicinity of the isolation member.
6 are formed.

The shield cases 105 and 107 are
3 to the parent substrate 112 by screwing, so that the shield cases 105 and 107 and the parent substrate 112
Is connected to the ground layer 121, and the patient circuit section 104 and the signal input / output section 106 are shielded by being sealed by shield cases 105 and 107, respectively. Further, the outer layers of the board from the outer periphery of the patient circuit section 104 and the signal input / output section 106 on the parent board 112 to the isolation member are respectively surrounded by a solid ground 126 and connected to the isolation member in the inner layer of the board. Pattern layer 1 for input / output signal path
24 is also completely shielded to the vicinity of the isolation member.

As described above, according to the second embodiment, the patient circuit section and the signal input / output section are separately shielded, and the isolation member for insulating the patient circuit section and the signal input / output section is provided. The input / output signal path is arranged in the inner layer of the board, and the input / output signal path is shielded by the solid earth provided in the outer layer of the board, so that the shielding effect can be further improved and radiation and mixing of unnecessary radiation noise can be reduced. Can be prevented.

[Additional remarks] (1) In an endoscope imaging apparatus having a video signal processing means for processing a video signal obtained by an imaging means, a signal level detection means for detecting a signal level of the video signal obtained by the imaging means A white balance adjustment unit for performing white balance adjustment on the video signal, a black balance adjustment unit for performing black balance adjustment on the video signal, and a common instruction for instructing the white balance adjustment unit and the black balance adjustment unit to start operating. When the balance adjustment start switch is operated, and when the balance adjustment start switch is operated, the operation instruction by the balance adjustment start switch is based on the signal level detected by the signal level detection means. And determine if The endoscope imaging apparatus characterized by comprising a control means for operating said white balance adjusting means or black balance adjusting means.

(2) The control means operates the white balance adjusting means when the signal level detected by the signal level detecting means is higher than a certain level, and operates the white balance adjusting means when the signal level is lower than the certain level. The endoscope imaging apparatus according to claim 1, wherein the black balance adjustment unit is operated.

(3) The control means determines which of white balance adjustment and black balance adjustment is based on the luminance signal level of the video signal as the signal level detected by the signal level detection means. The endoscope imaging apparatus according to claim 1, wherein:

(4) A patient circuit section electrically connected to an endoscope usable in a living body, and a signal input / output section connected to the patient circuit section via isolation means. In the endoscope imaging apparatus, the isolation means includes an isolation member for exchanging signals between the patient circuit unit and the signal input / output unit, and an input / output signal path to the isolation member. Wherein the patient circuit section, the signal input / output section, and the isolation member are mounted on an inner layer of a substrate, and a solid earth surrounding the input / output signal path is provided on an outer layer of the substrate. Mirror imaging device.

(5) Separate shield cases respectively surrounding the patient circuit section and the signal input / output section are provided, and these shield cases are electrically connected to a solid ground provided on an outer layer of the board and are provided on the board. 5. The endoscope imaging apparatus according to claim 4, wherein the endoscope imaging apparatus is attached to the endoscope.

[0061]

As described above, according to the present invention, erroneous use of white balance adjustment and black balance adjustment can be prevented, proper color reproducibility can be obtained, and the apparatus can be downsized. The effect is as follows.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an overall configuration of an endoscope imaging apparatus according to a first embodiment of the present invention.

FIG. 2 is a block diagram illustrating a configuration of a white balance / black balance adjustment circuit.

FIG. 3 is an explanatory diagram illustrating an operation of a balance adjustment controller during white balance adjustment.

FIG. 4 is an explanatory diagram illustrating an operation of a balance adjustment controller during black balance adjustment.

FIG. 5 is a flowchart illustrating an operation of a CPU regarding white balance adjustment and black balance adjustment.

FIG. 6 is a block diagram showing a configuration of an endoscope imaging apparatus according to a second embodiment of the present invention.

FIG. 7 is an explanatory diagram illustrating an internal configuration of a video processor according to a second embodiment;

FIG. 8 is an explanatory diagram showing a configuration of a mounting part of a shield case in the video processor.

FIG. 9 is an explanatory diagram showing a shield structure of an input / output signal path to an isolation member between a patient circuit unit and a signal input unit.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Endoscope imaging device 2 ... Camera head 3 ... Scope 5 ... Camera control unit (CCU) 7 ... CCD 14 ... Y / C separation circuit 15 ... RGB matrix circuit 16 ... Luminance signal level detection circuit 17 ... White balance / black Balance adjustment circuit 18 Balance value detection circuit 19 Digital video processing circuit 20 CPU 23 Font generator 25 Balance adjustment start switch

Claims (1)

[Claims] 1. An endoscope imaging apparatus having video signal processing means for processing a video signal obtained by an imaging means, wherein: a signal level detection means for detecting a signal level of a video signal obtained from the imaging means; A white balance adjustment unit that performs white balance adjustment on a signal; a black balance adjustment unit that performs black balance adjustment on the video signal; a common balance adjustment start switch that instructs the white balance adjustment unit and the black balance adjustment unit to start operating When the balance adjustment start switch is operated, whether the operation instruction by the balance adjustment start switch is white balance adjustment or black balance adjustment based on the signal level detected by the signal level detection unit is determined. Judgment and said white The endoscope imaging apparatus characterized by comprising control means for operating the balancing means or black balance adjusting means.