JPS63229025A - Image pickup apparatus for endoscope - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to an endoscope imaging device that can connect scopes with different color imaging methods and has a separate signal connector.

[Prior Art] In recent years, optical endoscopes (also called fiberscopes) have been developed in which an optical image formed by an objective lens at the distal end of the insertion section is transmitted to the proximal side by an image guide formed by a fiber bundle. Instead, the optical image formed by the objective lens is photoelectrically converted by a solid-state image sensor such as a charge-coupled device (hereinafter referred to as FCCD), converted into an electrical signal, and transmitted to the hand side, which is then sent to the hand side via a video processor. Electronic endoscopes (hereinafter also referred to as electronic endoscopes or electronic scopes) that can be displayed on a monitor have come into practical use.

The above-mentioned electronic scope is currently used for the upper or lower gastrointestinal tract and has a diameter of approximately 10 mm.

However, for example, an endoscope for the bronchi usually requires an endoscope of around 5φ or less, and in order to realize an electronic scope for the bronchi (tubules), it is necessary to use an image carrier with a small number of pixels. do not have.

When the number of pixels mentioned above is small, rather than using a color imaging method that uses a color mosaic filter to prevent resolution degradation, the source of the illumination is illuminated sequentially with light of red, blue, and green wavelengths. A frame-sequential color imaging system is advantageous, in which images are captured in frame-sequential order, and these images are combined and displayed in color. On the other hand, if the diameter is large, the number of pixels is large, and a sufficient resolution can be obtained, a mosaic color imaging method using a mosaic filter may be adopted.

In the case of the above electronic scope, in addition to the light source device used in the fiber scope, a bioprocessor is used that processes signals and converts them into video signals that can be displayed on a color monitor.

By the way, in the conventional example, only one fiber scope or an electronic scope is used, and the light source device for the fiber scope or the video processor and light source device for the electronic scope cannot be shared.

Further, even if the A3 electronic screen is used, different signal processing must be performed for different color MFF11 systems, requiring separate video processors and light source devices.

For this reason, a system has been proposed in which an imaging adapter can be connected to a fiberscope and images can be displayed on a color monitor screen, as disclosed in, for example, Japanese Patent Application Laid-Open No. 60-243625.

The above conventional example can form an electronic scope that performs color imaging in a frame-sequential manner when an imaging adapter is connected; Color display can be performed by sequential imaging.

[Problems to be Solved by the Invention] The above system has a drawback in that a color mosaic electronic scope cannot be connected and used. Further, since only the above-mentioned frame sequential method can be used, it is desirable to use a color mosaic type electronic scope when photographing a moving subject, but it cannot be used selectively.

The present invention has been made in view of the above-mentioned points, and an object of the present invention is to provide an image carrier for an endoscope that can also be used for a color imaging system.

[Means and effects for solving the problem] The present invention provides a color imaging scope with a different system, a signal processing means for generating a signal that can be displayed on a color monitor,
By making it possible to connect color imaging scopes with different methods and providing a connection mechanism with a separate signal connector part, signals corresponding to each color imaging scope of any method can be connected. It is processed so that it can be displayed in color on a color monitor.

[Example] Hereinafter, the present invention will be specifically explained with reference to the drawings.

1 to 10 relate to a first embodiment of the present invention, FIG. 1 shows the entire system of the first embodiment, and FIG. 2 shows an imaging device connected to a field-sequential electronic scope. Figure 3 shows the structure of a mosaic type electronic scope, Figure 4 shows the structure of a field sequential type external 4-camera fiber path, and Figure 5 shows the structure of a mosaic type TV camera. Figure 6 shows the structure of a Noviperscope, and Figure 7 shows a 1L! 8 shows the structure of a mosaic type process circuit, and FIG. 9 shows a type signal generation circuit.
Figure 0 shows the identification circuit.

As shown in FIG. 1, the endoscope image carrier 1 of the first embodiment includes various types of scanners (endoscopes) 2Δ, 2B.

The imaging device main body 3, which can be connected to any of 2C, 2D, and 2E, is shown on the right. As shown in Fig. 1, there are five types of scopes: a field sequential electronic scope 2A;
An electronic scope using a color mosaic filter (hereinafter referred to as a color [zaic type electronic scope or mosaic type electronic scope)] 2B, a fiber scope with an external frame sequential type TV camera (hereinafter referred to as a fiber scope with a frame sequential type TV camera) ) 2G, fiberscope with external color mosaic TV camera (hereinafter referred to as (color) fiberscope with mosaic TV camera) 2D1 fiberscope 2F.Each scope 2△.

2B, 2C, 2D, and 2E each have an elongated insertion portion 3;
An operating section 4 is formed on the rear end side of the insertion section 3, a universal cord extends from the operating section 4, and light source connectors 5A, 5B are provided at the tips of the universal cords.

5C, 5D, and 5E are provided respectively. In this case, in the field-sequential electronic scope 2A and the color mosaic electronic scope 2B, in addition to the light source connectors 5A and 5B, connectors 6A and 6B for No. 48 are installed on the tip side of the Univer 4 Nord. (This is a fiberscope 2C with a frame-sequential TV camera and a color fiberscope 2D with a screen-sequential TV camera.
A frame sequential type TV camera 8C and a color mosaic type TV camera 8D are respectively attached to the eyepiece part 7 of F,
Signal connectors 6C and 6D are attached to the tips of signal cables extending from each TV camera 8C and 8D. Connectors 5A, 6Δ of these scopes 2Δ, 2B, 2C, 2D, 2E (hereinafter, if you are familiar with all these scopes, they will be represented by the code 2); 5B, 6B; 5C, 6C
5D, 6D: 5E are connected and each scope 2 can be set in a usable state, for example, two sets of connector holders are provided on the front surface of the housing of the imaging device main body 3.

These connector receivers are connector receivers 11 for surface sequential light sources.
a, Field sequential signal connector 12a and white light source connector receiver 11b1 color [Zaiku signal connector 12
It consists of b. Connector holder for field-sequential light source (plane-sequential electronic scope 2A is installed in pull-out 11a).

Field-sequential TV camera fiberscope 2C (this 2
The two scopes 2A and 2C are also referred to as field-sequential scopes (1°) and are shaped so that light source connectors 5Δ and 5G of the same shape can be connected to each other, respectively. In addition, a screen sequential type electronic scope 2A is attached to a screen sequential type signal connector receiver 12a adjacent to the lower side of the screen sequential type light source connector receiver 11a.
, a fiber scope 201 with a field sequential type TV camera, that is, a shape that allows connection of signal connectors 6Δ, 6C of the same shape to each other of the field sequential type scopes 2A, 2C.

On the other hand, the white light source connector receiver () 11b includes a light source connector 5B of the color mosaic type electronic scope 2B, a color mosaic type 19 fiber scope with TV camera 2D (these two scopes 2B and 2D are also referred to as a mosaic type scope). These connectors 5B, 5D, and 5E have the same shape so that the light source connector 5F of the fiber scope 2E can be connected to the light source connector 5D together with the light source connector 5D. Also, a color mosaic type signal connector receiver 12b adjacent to the lower side of this white light source connector receiver 11b
The connectors 6B and 6 are of the same shape so that the signal connector 6B of the color mosaic electronic scope 2B and the trust connector 6D of the color fiberscope with TV camera 2D can be connected. .

When using the Fipath TI-72E connected, it is observed with the naked eye, but with another scope 2A.

When the 28.2G and 20 are used, the silver image can be displayed in color by the color monitor 13 connected to the signal output terminal of the imaging device main body 3.

Incidentally, a light source connector 5A in each scope 2.

In this embodiment, 5B, 5G, 5D, and 5E are provided with air/water supply connectors as well as lie 1 to guide connectors, and the connector receiver 118.11b is also structured to connect these.

The internal configurations of the scopes 2A, 2B, 20.2D, and 2E are shown in FIGS. 2, 3, and 4, respectively.

= 9- Shown in Figures 5 and 6. Each scope 2 is inserted with a light guide 14 that transmits illumination light, and transmits the illumination light supplied to the input end face from the light source section 15a or 15b in the imaging device main body 3 to the output end face side. J: sea urchin, which can illuminate the front subject side through the light distribution lens 16 placed in front of the end face.

Furthermore, in each scope 2, an objective lens 17 for imaging is arranged at the distal end of the insertion section 3. The focal plane of this objective lens 17 has both a field-sequential type and a color mosaic type electron beam.
In 12A or 2B, a CCD 18 is arranged, while in fiber bus 2F, TV camera 8C or 8D
2C or 2
At D, the image guide 19 is arranged so that its entrance end face faces.

An eyepiece lens 21 is arranged opposite to the exit end face of one of the image guides. However, fiber scope 2
The EC is designed to allow observation with the naked eye by bringing the eye close to the eyepiece 7 (), while the fiberscope 2
[If the eyepiece 7 is equipped with a field-sequential TV camera 8C or a color t-saic TV camera 8D, the camera C0D22 is mounted opposite the eyepiece 21 (via an imaging lens not shown). is located. In addition, color 1: Chiku type electronic scope 2B or color mosaic type T
A color mojiku filter 23 is arranged in front of the imaging surface of the CCD 18 or 22 used in the V camera 8D. Each CCD 18 or 22 forming the imaging means photoelectrically converts the optical image formed on the imaging surface, and the preamplifier 24
After being amplified by the signal transmission line, the signal is amplified by the signal connector 6 (6A).

Represents 6B, 6G, and 6D. ) side and the signal connector receiver 12a or 12b to which the connector 6 is connected
The video signal is input to the video processor 25a or 25b via the video processor 25a or 25b. In addition, each CG018 or 22 has a video processor 25.
A CCD driving clock is applied from the driver 26a or 26b forming the driver 26a or 25b.

In addition, a type signal generation circuit 27A outputs a type signal for scope identification to scopes other than the fiber scope 2F.
, 278.27C, 27D are provided, and the identification circuit 28a or 2 in the image carrier main body 3 is provided via the signal connector 6.
8b.

By the way, as shown in FIG. 2, the image carrier main body 3 which can be connected to any of the scopes 2 shown in "-" includes two sets of light source sections 15a and 15b and two sets of video processors 25a and 2.
5b is stored.

One light source section 15a is of a field sequential type, and the white light from the light source lamp 31a is converted into R, G, and B illumination light through a rotating filter 33a rotated by a motor 32a.
The light is focused through the condensing lens 34a and the connector receiver 11
Illumination light is supplied to the incident end face of the light guide 14 attached to the a.

The other light source section 15b is a white light source, and is configured to condense the white light of the white lamp 31b with a condensing lens 34b and guide it to the connector receiver 11b for the white light source. White light is supplied to the input rA end face of the attached light guide 14.

By the way, one of the video processors 25a is for frame-sequential signal processing, and the signal input to the signal input terminal of the connector receiver 12a for frame-sequential signals is input to the frame-sequential process circuit 41a. , R, G, and B wavelengths of illumination light are used as color signals R, G.
, output as B. The color signals R, G, and B each pass through a driver formed by the buffer 42a, and are output as three primary color signals QRGB from the three primary color output terminal 71I3a.

Further, the color signals R, G, and B are transmitted through the 71 to 9792 circuits 44a.
The brightness signal Y and the color difference signals R-Y and B-Y are generated, and then input to the NTSC encoder 45a and N
The signal is converted into a TSC system composite signal and output from the NTSC output terminal 46a.

A rotational position sensor 51a for detecting the rotational position is provided at one location on the outer periphery of the rotating filter 33a forming the field-sequential light source section 15a, and its output determines the clock timing of the timing generator 52a by the rotating filter 33a. The output of the timing generator 52a controls the timing of the frame sequential process circuit 41a.

This frame-sequential process circuit 41a has a configuration shown in FIG. 7, for example.

That is, the signal inputted via the preamplifier is inputted to the sample and hold circuit 54, sampled and held, and then γ-corrected by the γ-correction circuit 55 and converted into a digital signal by the A/D ml inverter 56. After that, the signals imaged under the sequential illumination of R, G, and B through the multi-break+157 which is switched by the signal of the timing generator 52a are transferred to the R frame memory 58R, the G frame memory 58G, and the B frame memory 58B. written to.

The signal data written in each of these frame memories 58R, 58G, and 58B are simultaneously read out and converted into analog color signals R1G and B by a D/A converter 59, respectively.
The signal is output to the matrix circuit 44a described above.

On the other hand, attach the color mosaic signal connector 12b to C.
The signal captured by the CD 18 or 22 is input to a color mosaic process circuit 41b, and a brightness signal Y and color difference signals RY and BY are output. However, the signal is NT
The signal is input to the SC encoder 45b, converted into an NTSC composite video signal, and outputted from the NTSC output terminal 46b.

Further, the color signals R,
A buffer 42b that is converted into G and B and forms a driver.
The three primary color signals RG are output from the three primary color output terminals 43b through the three primary color output terminals 43b, respectively.
B is output.

Incidentally, the color mosaic process circuit 41b, for example, as shown in FIG.
The signal from 0D18 (or 22) passes through a brightness signal processing circuit 61 to generate a brightness signal Y. In addition, the color fh signal reproduction circuit 62 generates color difference signals @R-Y and B-Y in time series for each horizontal line, and the white balance circuit 63 performs white balance correction, and one of the signals is analog. Directly to switch 64, the other side is 1H delay line 65
analog switch 64 delayed by one horizontal line
', and color difference signals RY and BY are obtained by the switching signal of the timing generator 53b.

Note that each timing generator 52a, 52b is connected to a driver 26a, 26b and a TNSC encoder 4, respectively.
A signal is applied to 5a and 45b to control the CCD 18 or 22 so that signal processing is performed in synchronization with the drive pulse used to read out the signal.

In this case, in the frame-sequential video processor 25a, the timing generator 52a is synchronized with the rotation filter 33 by the output of the rotation position sensor +1-51a. In addition, the above NTS C encoder 45a
, 45b are constructed with built-in buffers.

By the way, the type signal generation circuits 27A and 27B.

27G and 27D are formed, for example, by connecting resistors with different resistance values between two terminals, and on the other hand, the identification circuit 2
8a and 28b use a comparator or the like to measure the resistance value between the two terminals so that it can be identified which resistance scope is connected.If the connection is made incorrectly, a warning will be given by a bridge or an LED will be displayed. A warning is given by lighting.

An example of a type signal generation circuit and identification circuit that performs this operation is shown in FIGS. 9 and 10.

As shown in FIG. 9, the type signal generation circuits 27A, 2
7C, 27B, and 27D are, for example, signal connectors 6A,
Two terminals 72 and 72 in 6B are connected by a resistor RO of an appropriate value (for example, 220Ω), and the other is short-circuited by a conducting wire 73. On the other hand, the identification circuit 28a
As shown in Figure (a), one input terminal 75 of the input terminals 75.75 connected to the two terminals 72.72 is connected to, for example, a +5V power supply terminal, and the other input terminal 75 is connected to a comparator 76. It is connected to a non-inverting input terminal of .77 and grounded via a resistor RO of, for example, 220Ω.

A voltage V1 of, for example, 3 to 4 V is applied to the inverting input terminal of one comparator 76 by a reference voltage source, and a voltage V1 of, for example, 1 to 2 V is applied to the inverting input terminal of the other comparator 77 by a reference voltage source. Voltage V2 is applied. The output of the above two] comparators 76 and 77 is a two-man powered AND circuit 7.
8 to an output end 79.

The output end 79 is connected to a field-sequential signal connector receiver 12.
A is the signal connector 6 for the field sequential scope 2A or 2C.
If A or 6C is connected, it becomes 41 L II, but if connector 6B or 6D for mosaic type scope 2B or 2D is accidentally connected to this connector holder 12a, it becomes II 1"T1, A warning command signal is output to the warning circuit 66a, and a buzzer is activated or an LED is turned on to notify that there is an incorrect connection.

The other identification circuit 28b is configured so that the output of the comparator 76 is inverted by an inverter 81 and the output of the comparator 77 is guided to the output terminal 83 through a two-man AND circuit 82 in FIG. 10(a). The configuration is as follows.

According to this identification circuit 28b, the mosaic type S]-12B
Or, if 2D is connected, it will be "L", but signal connector 6A or 6C of field sequential type scope 2Δ or 2C
If it is connected incorrectly, it becomes “+1” and the warning circuit 6
Outputs the WS command signal to 6b and issues a warning with a buzzer or LFD.

By the way, on the front surface of the housing of the layer imaging apparatus main body 3, for example, there are provided a surface sequential substitute power switch SWa and a mozoic type power switch swb.
It can be turned on and off independently.

According to the first embodiment depicted in this way, the light source unit 15a and the frame sequential video processor 25a for a field sequential type scope, and the light source unit 15b for a color mosaic type scope.
and the color mosaic type video processor 25b, and connection means for each scope is provided, so that no matter which of the frame sequential type scopes 2A, 2G and the color mosaic type scopes 2B, 2D are connected, the connected The scope can supply illumination light and perform signal processing corresponding to the scope, and can display the subject image captured by the scope in color on the color monitor 13.

Further, when using the fiber scope 2F, the light source connector 50 can be connected to the white light source connector socket 11b, and when covered in this manner, observation with the naked eye can be performed.

In addition, in the connector receivers 11a and 12a for the surface sequential type, and the connector receivers 11b and 12b for the mosaic type, the light source connector portion and the signal connector portion are provided close to each other, and the one on the surface sequential side and the t Since it is separate from the one on the Zaik side, for those with a different imaging method, simply switch SWa or SW while the scope is connected.
Turn on b.

You can set it to the operating state by turning it off, so you don't have to take it on or take it off every time you use it. Also, since the connection means for the signal connectors are separate for the field-sequential type and the 'E4149 type, it is necessary to install a circuit to switch the signal processing depending on the connected stage. There is no.

On the other hand, two sets of connector receivers 12 provided in the image carrier main body 3
If an incorrect scope is connected to a or 12b, the identification circuit 28a or 28b can detect that the connection is incorrect, and a warning circuit 66a or 66b can issue a warning.

Therefore, according to the first embodiment, when one imaging device main body 3 is provided, it can be used with different scopes with different color imaging methods, and can also be used simultaneously with the fiber scope 2F. Furthermore, if an incorrect connection is made, a warning will be given, making the device easy to use.

Incidentally, if the shape is used to surround the signal connector 6 (signal connector receiver 12) in a plane-sequential type or a mosaic type, erroneous connections can be easily prevented and malfunctions can be reliably prevented.

Note that the output formats of the signals after signal processing for the two color imaging methods described above are the same.

In other words, the same color monitor 13 can be used since both of them match the three primary color output or NTSC format video signals. Note that if the TV camera 8C or 8D is attached to the fibre-pass lobe 2E, the captured image will be displayed on the color monitor 13, but if the TV camera 8C or 8D is removed. , the fact that it is removed may be displayed on the screen of the color monitor 13.

According to the first embodiment, when the signal connector 6A or 6C of the field sequential type scope 2A or 2C is correctly connected to the field sequential type signal connector receiver 12a, the warning LED and the Colored LEDs that light things up and light things up
The connection may be indicated by lighting up to indicate that the connection is correct. This can be similarly applied to the Zaic type.

Also, a warning may be issued when two signal connectors are connected to both signal connector receivers 12a and 12b at the same time. Also, for field sequential light source] connector receiver 11a
It is possible to install a connection detection means for the light source connector 5 on the inside of the fiberscope 2E, and to notify that there is an incorrect connection when the connector 5 of the fiberscope 2E is connected. It is possible to issue a warning when the connector 5F is connected and neither of the signal side connectors 11a, 11b are connected.

FIG. 11 shows a modification of the connector and connector receiver.

In the image carrier body 3', a round field-sequential light source connector receiver 91a and a signal connector receiver 92a, a white light source connector receiver 91b, and a color mosaic type signal connector receiver 92b are spaced apart on the front surface of the housing. It is a provision. Both connector receivers 91a, 91b or 928.92
b have the same shape as each other.

On the other hand, as shown in FIG. 11(a), the field sequential type S]-12A has a light source connector part and a signal connector part 94 so that it can be connected to the field sequential type light source connector receiver 91a1 and the signal connector receiver 92a. Connector 93 that integrates
A is a provision.

Similarly, the color mosaic type scope 2B is shown in Fig. 11 (
As shown in b), the white light source connector holder [No. 91b]
Also provided is a connector 93B that can be connected to the color mosaic signal connector receiver 92B.

Further, as shown in FIG. 11(a), the fiberscope 2C with a field-sequential TV power camera has a light source connector 94. A
When combined with the signal connector 95A, it is possible to form the same shape as the connector 93A of the above-mentioned field-sequential electronic scope 2A, and the field-sequential connector receivers 91a, 92a
Can be used by connecting to.

In addition, as shown in Fig. 11(b), a color mosaic type TV
Fiberscope 2D with camera also has light source connector 9
4A and the signal connector 95B can be made into the same shape as the connector 93B of the color mosaic electronic scope 2B, and the white light source connector receiver 91b1 signal]
It can be connected to the connector receiver 92b.

Also, by connecting the light source connector 94 of the fiberscope 2F to the white light source connector socket 92b,
It can supply white light to the light guide of the fiberscope 2F and can be seen with the naked eye.

If the connection is different from that shown in FIGS. 11(a) and 11(b), the signal of the type signal generation circuit is identified by the identification circuit by connecting the signal connector as explained in the first embodiment, and the lff It's like issuing a request.

FIG. 12 shows the main parts of a video processor in a second embodiment of the present invention.

This second embodiment uses an output circuit 96 (equipped with a signal conversion function) in which the output terminals of the video processors 25a and 25b in the first embodiment are shared.

That is, in FIG. 2, a 3-circuit, 2-contact changeover switch 97 is provided between the output end of the matrix circuit 44a and the input end of the NTSC encoder 4.5a, and the output end of the inverse matrix circuit 4-4b There are also 3
A changeover switch 98 with two circuit contacts is provided.

When one contact side of the changeover switch 97 is turned on, the signal from the matrix circuit 44a is guided to the common NTSC encoder/I5, and the N
It is converted into a TSC video signal and outputted from a common NTSC output port 46. Also, when the other contact side is selected,
The signal of the mosaic type bus access circuit 41b is input to NTSCI]
- output from a common NTSC output terminal 46.

On the other hand, for the other selector switch 98, when the frame sequential type side is selected, the output signal of the frame sequential type process circuit 41a is transferred to a common buffer 42, 42, 42 forming a driver.
Three primary color signals are outputted from a common RGB output terminal 43 through the three primary color signals. Also, when the mosaic process circuit side is selected,
The three primary color signals R, G, which have passed through the reverse 71-lix circuit 44b,
B is output from a common RGB output terminal 43.

Said changeover switch 97. ．． Each of 98 can be switched manually, or they can be switched in conjunction with each other. Further, using the type signal output from the scope connected to both the changeover switches 97 and 98 as shown in FIG. 2, this type signal is identified by the identification circuit 28a or 28b, and the changeover switch 97 98 can also be switched to a process circuit 41a or 41b that performs signal processing corresponding to the connected scope. To do this, for example, in Figure 10(a)
The identification circuit 28a shown in FIG. 1 may be configured as a circuit 28a' shown in FIG. Identification circuit 28 shown in FIG. 10(a)
a, the output of the comparator 76 is connected to the inverter 99
When the output obtained by inverting the output of the comparator 77 and the output of the comparator 77 through the two-man AND circuit 100 is ``Tobi'' (when the field sequential scope 2A or 2C is connected), the above changeover switch 97.98 What is necessary is to switch to the field sequential side.

Furthermore, when the selector switches 97 and 98 are formed of analog switches or the like, the connection detection device 101 shown in FIG.
It is also possible to switch automatically by J:.

For example, a surface sequential type connector is provided with an identification pin 102 that is not found in a mosaic type connector, and a surface sequential type connector receiver is provided with a recess into which this pin 102 can be inserted.

Therefore, horizontal holes 103 and 1 are provided on opposite sides of these four parts.
03 is provided, and a light emitting means such as an LED 104 is connected to a light receiving means such as a transistor 105, and the outputs of the light receiving means 1 to transistor 105 are inputted to a discrimination circuit formed by a comparator 106 and the like. . Above LED
102 is supplied with current from, for example, a 5-inch power source via a resistor R. Further, the phototransistor 105 has its collector connected to +5⁻ through a resistor R, and its emitter connected to ground. This collector is also connected to the non-inverting input terminal of the comparator 106 and compared with the voltage Va connected to the inverting input terminal. This voltage Va is set to, for example, 2 to 3 V, and since the phototransistor 105 is normally conductive, the output of the =1 amparator 106 is 11+1.

Therefore, when the pin 102 is engaged in the recess, L[ED
The light of transistor 104 is blocked, and the output of transistor 105 becomes +i Hu. This change in output is determined by the amplifier 106, whose output becomes 'H', and the output of transistor 105 becomes +i Hu. identification or changeover switch 44,48.

Incidentally, when the output of the transistor 84 serving as the light receiving means is L'', the color mosaic type process circuit side is selected.

By providing the identification means shown in FIG. 14 also for identifying the mosaic type scope, incorrect connection can be determined. In this case, different identification pins may be used for the mosaic type and the surface sequential type.

FIG. 15 shows the main parts of the video processor in the fourth embodiment of the present invention.

In this video processor, an output circuit 96 having a signal conversion function as shown in FIG. I have to. Although the other changeover switch 98 shown in FIG. 12 is not provided, it may be provided.

The changeover switch 97 is connected to the identification circuit 28 shown in FIG.
The switching may be performed by the output of a' or may be performed manually.

The other parts are the same as those shown in FIG. 12 above.

According to this embodiment, the outline enhancement is performed in common for the two different methods of brightness a4E, so the number of parts is lower than when two sets are provided for each method. can be reduced, and the configuration can be simplified to n1.

Moreover, the cost can be reduced to 1~.

In addition, in Fig. 15, contour enhancement (horizontal or vertical or both 7!5
), the NTSC encoder 45 and the inverse matrix circuit 4/Ib are also shared. Further, instead of the contour emphasizing circuit 112, a line interpolation circuit or an auto gain control circuit may be provided.

In addition, common circuits include frame memory, still image memory, colorverse 1 generation, power supply, character generator, superimpose circuit,
It may also be a circuit such as a keyboard controller, color tone adjustment circuit, etc.

FIG. 16 shows a modification of FIG. 14.

That is, the circuit shown in FIG. 15 performs signal processing for edge enhancement on both frame-sequential and mosaic signals (the glitter signal), but the circuit shown in FIG. The signal processing section is designed to allow selection of signal processing such as edge enhancement, and to prevent signal deterioration when no signal processing is performed. For this reason, matrix circuit 4.4
Switch SW before and after the signal processing circuit 121 in the latter stage of a
1. SW2 is provided. Further, the output of the mosaic process circuit 41b is output from the switch S on the output side of the switch SW2.
This allows the signal to be input to the N1-SC encoder 45 via W3. When the signal passing through the signal processing circuit 121 is output from the RGB output terminal, switch S
The signal passes through W4, passes through the inverse matrix circuit 44b, and is output via the switch SW5. Further, the RlG and B signals of the field sequential process circuit 41a are sent to the matrix circuit 4.
4a, R, G again through the inverse matrix circuit 44b
, RlG directly from the RGB output terminal via the switch SW5 so as to prevent signal deterioration from returning to the B signal.
, B3 primary color signals can be output.

Each switch SW1 to SW in the modification shown in FIG. 16
5 signal processing is performed (on or off)
becomes as shown in the logical table below.

Note that Δ indicates that it may be on either side.

In the embodiment shown in FIG. 16, the bright spot Y, color X signal R
-Y and B-Y are subjected to 151-month processing, but it is also possible to perform signal processing only on the luminance signal.

Furthermore, in the circuit shown in FIG. 12, the luminance (g processing) and the signal processing for each of the R, G, and B colors (U number) may be performed after each changeover switch.

In the fourth embodiment of the present invention (FIG. 17), the light source connector portion is shared in the main body of the imaging device.

In the fourth embodiment, for example, on the front surface of the housing of the imaging device main body 131, a common light source connector receiver 91 is provided as shown in FIG. A connector receiver 92a and a color mosaic type signal connector receiver 92b are provided.

On the other hand, the connector 132A of the field-sequential electronic scope 2A and the connector 132B of the color mosaic electronic scope 2B
Both of the light source connector parts can be attached to the light source connector receiver 91, and each signal connector part can be connected to the plane sequential connector receiver 92a and the color mosaic connector receiver 92b, respectively. . Although not shown in FIG. 18, the same applies to electronic scopes 2C and 2D equipped with frame-sequential and mosaic TV cameras. Further, the connector of the fiber scope 2F is connected to the connector receiver 91 for light source, and observation can be performed with the naked eye.

In the imaging device main body 131 shown in FIG. 17, the rotating filter section 133 is connected to the rail 134 as shown in an enlarged view in FIG.
, 134.

The rotary filter section 133 is usually mounted on a rail 134.1.
34, and for example, as shown in FIG. becomes. Meanwhile, from this state, move the rotating filter section 133 to the lower side of the rails 134, 134! 1iII, the light source is interposed in the optical path as shown in FIG. 17, and a field sequential light source section is formed.

By the way, the rotary filter section 133 is connected to the movement control circuit 1.
35, the movement is controlled by J:, and this movement control circuit 135 is brought into operation by the identification signal from the identification circuit 28a. In this embodiment, when the type signal generated by the type signal generation circuit 27Δ or 27G identifies that the scope is a field sequential type scope, the identification circuit 28a outputs a movement control command to the movement control circuit 135, and the rotation filter unit 133 is moved from the state shown in FIG. 19 to the state shown in FIG.

On the other hand, when the mosaic scope 2B or 2D connector is connected, the rotary filter section 133 is not moved.
White light is provided. Also, when the fiberscope 2F is attached, white light is supplied to the connector of the fiberscope.

Note that when the frame-sequential scope 2A or 2c is attached and then removed, the rotating filter section 133 is returned to the state where it is retracted from the optical path.

The rest of the structure is the same as that shown in FIG. 2.

According to this fifth example, since the light source is shared,
Field-sequential or mosaic type scopes can be handled without providing two sets of light source units. Also, when connecting the fiberscope connector, having two light source connector holders will prevent erroneous connections from being mistakenly connected to the side of the field-sequential type, making it easier to use.

Note that the rotary filter section 133 may be moved manually.

FIG. 20 shows an imaging device main body 1 according to a sixth embodiment of the present invention.
41 is shown.

In the fifth embodiment, the rotating filter section 133 is movable, but in this embodiment, the light source section 142 is movable along the rails 143, 143.

-35= For example, the connector receiver on the front side of the main body 1/11 of the image carrier of this embodiment has a J: shape structure as shown in FIG. are doing.

By the way, the light source section 142 in the imaging device main body 141 is normally equipped with a connector receiver (for white light source) (first
The same reference numerals as those shown in Figure 1 are used. ) 91b, and when the field-sequential scope 2A or 2C is connected as in the fifth embodiment, the identification circuit 28a identifies it based on its type signal, and the Move the light source section 142 (move it to the bottom in Fig. 21,
(moves to the left in the figure), and as shown in FIG. R,
It is designed to supply G and B illumination lights.

By the way, the imaging device main body 141 of this embodiment has the 20th
As shown in the figure, unlike the one shown in FIG. 17, a shared output circuit 113 is used.

The specific configuration of this output circuit 113 is shown in FIG.

The rest of the structure is the same as that shown in FIG. 17 above,
It has the same effect as Habo.

In the sixth embodiment, the connector receiver can be moved together with the light source section 142. In this case, when the mosaic type scope 2B or 2D is connected, it does not move, but when the frame sequential type scope 2A or 2C is connected, it is moved. Note that the fiber scope 2F is not moved.

In this case, there will be only one connector socket.

This embodiment can also be structured to move manually.

FIG. 22 shows the configuration of a seventh embodiment of the present invention, and FIG. 23 shows its external shape.

The image carrier main body 145 shown in FIG. 23 is provided with a light source connector receiver 148 that is shared with the frame sequential signal connector receiver 147a so that the connector 146 of the frame sequential type electronic scope 2A can be connected. With motor 13) J error can be displayed. The above connector cover holders (P147a and 148
A connector (not shown) for a fiberscope 2C equipped with a field-sequential TV camera can also be connected and used.

Also, in the case of fiberscope 2, its connector 1
49 can be connected to the light source connector receiver 1/I8 for observation with the naked eye.

[For the above-mentioned light source] The light source section inside the connector receiver 148 uses a rotary filter shown in FIG. 271, which normally outputs white light, and when the rotary filter is rotated, illumination is performed in a field-sequential manner. It is.

This rotary filter 150 has -no filter frame 151 with R
, G, B color transmission filters 152R, 152G, 152
B is a step, and for example, a hole 15 for white illumination is provided in the light-shielding part between the R9B color transmission filters 152R and 152B.
3 is provided, and this hole 153 is attached so as to be rotatable about a position in the middle of a line connecting the hole 153 and the center.
Light can be blocked by a light shielding plate 154.

That is, when the filter frame 151 is rotated by the motor 32a, the light shielding plate 154 is caused by centrifugal force.
As shown in FIG. 25, the direction connecting the center position of the disc-shaped light shielding part and the pivot point coincides with the radial direction, and in this state, the hole 15
3 are connected by the light shielding plate 154, and the normal R, G, B
It is possible to perform surface sequential illumination.

On the other hand, when stopped, the centrifugal force does not work, so the light shielding plate 154 is retracted from the hole 153 by gravity, as shown in FIG.

The position of the filter frame 151 is controlled so that the hole 153 is on the optical axis connecting the light source lamp and the lens 34 in the stopped state. The filter frame 151 has a large number of holes 155, 155, .
In addition, a light emitting element and a photosensor 156 are arranged on both sides of the plate surface of the filter frame 151 to form a position detection rotary encoder. In FIG. 24, the photosensor 156 is attached to the tip of the plate 157.

The above-mentioned illumination by the field sequential method is performed by the rotation/stop circuit 1 according to the type signal outputted at that time when the field sequential signal connector is connected to the field sequential signal connector cover receiver 133a.
61 becomes operational, the motor 32a is driven to rotate the rotary filter 150, and sequential illumination is performed.

By the way, a recess is provided in the lower front side of the imaging device main body 145, so that the mosaic type pre-processor unit 167 can be plugged in and installed.

A mosaic signal connector receiver 147b is provided on the front of this mosaic preprocessor unit l-167, and the signal connector 168 of the mosaic TV camera 8D can be connected to this connector receiver 147b. A signal connector (not shown) of the scope 2B can also be connected.

As shown in FIG. 22, inside the image carrier main body 145,
A light source unit using a rotating filter 150 shown in FIG. 24 is housed, and a frame sequential processor is also housed therein.

This frame-sequential processor is almost the same as that selected when the switch 103 is switched to the frame-sequential side in the J processor shown in FIG. Next is an output circuit 113 which is provided with a function of performing emphasis signal processing.

The changeover switch 97 in the output circuit 113 provided with a signal processing means for edge enhancement can be switched when the mosaic preprocessor unit 167 is plugged in.

According to this embodiment, if the mosaic type pre-processor unit 167 is purchased later if necessary, it can also be used with a mosaic type scope, and the functions of the device can be expanded economically.

Furthermore, even when the mosaic type preprocessor unit 167 is plugged in, a changeover switch SW is provided on the front surface of the device main body 145, for example, so that it can be used by switching between the field sequential and mosaic type. This allows the switching of the changeover switch 97 to be controlled.

In the seventh embodiment, the station name can be displayed on the front side of the plug-in units 1 to 1, but a mosaic video processor unit or a part thereof can be inserted into the expansion slot provided on the rear side. It is also possible to use the above-mentioned switch SW and the like with either a field-sequential type or a mosaic type scope.

In addition, as shown in FIG. 26, a mosaic video processor 172 is stacked on the top surface of an imaging device main body 171 equipped with a signal processing means for a field-sequential scope, and a signal cable 173 is connected from the mosaic video processor 172. It may be configured so that it can be used with any type of scope by connecting it to the connector receiver (':l) of the imaging device main body 171.

In addition, on the front side of the imaging device main body 145, the connector receiver 14.7a and 1/I8 as described above are installed +JC, and the mosaic type video processor +J142 also has the connector receiver 14.
7b is provided.

By the way, it is also possible to form a dancing image device 145' shown in FIG. 27, in which the imaging device main body having the size shown in FIG. 22 is integrated from the beginning. Furthermore, in the imaging device main body 145' shown in FIG. 27, the imaging device main body 145'' shown in FIG. 28 may be constructed using, for example, the one shown in FIG. 19 as the light source section.

Further, in FIGS. 27 and 28, signal processing other than contour enhancement may be performed.

Furthermore, in FIG. 22, a driver 26a.

26b and the identification circuits 28a and 28b may be shared. Further, the light source portion shown in FIG. 22 can be replaced with another structure.

In the apparatus shown in FIG. 22, a mosaic type unit 167 is plugged into the image pickup device main body 145 for the frame sequential type and can be used. It is also possible to attach a type unit.

Incidentally, the number of pixels of the CCD 22 of the TV camera 8C or 8D connected to the fiber scope 2F may be made larger than the number of pixels of the CCD 18 of the electronic scopes 2A, 2B to improve resolution. In addition, if the number of pixels of the TV camera 8C or 8D is increased in this way, the TV
It is sufficient to provide a signal processing circuit means corresponding to the number of pixels in the case of the camera 8C18D.

Further, the number of pixels of each COD of the electronic scopes 2A and 2B may be the same or different. In other words, for example, the number of pixels in the COD of a field-sequential scope can be reduced to make the diameter smaller.
Aiming at miniaturization, the COD of the mosaic type scope may have a larger number of pixels than the COD of the field sequential type scope to achieve higher resolution. The number of pixels of each COD of the TV cameras 8C and 8D may be the same or different.

Furthermore, the number of COD pixels of the frame-sequential electronic scope 2A and the mosaic TV camera 8D may be the same or different. That is, for example, the number of pixels of the COD of the field sequential type electronic scope 2A is reduced to reduce the diameter and size, and the number of pixels of the COD of the mosaic type TV camera 8D is larger than that of the COD of the field sequential type scope 2A. It is better to increase the resolution to achieve higher resolution. (Even if the TV camera is made a little larger, it is outside the body, so it is advantageous to increase the resolution without having much of an effect.)
Similarly, the number of pixels of the ccD of the frame sequential TV camera 12B and the frame sequential TV camera 8C may be the same or different.

For example, among the frame-sequential electronic scopes 2A, those having different numbers of COD pixels or signal transmission cable lengths may be provided. In this case as well, the identification circuit 28 identifies the number of pixels and signal transmission cable length of the type signal generation circuit 27 and changes the driving method of the driver 26 to match the number of pixels and cable length. Good too.

Further, the same may be applied to the other scopes 2B, 2C, and 2D.

In each of the above embodiments, the imaging scopes 2A and 2B.

Although the signal transmission between 2G, 2D and the signal processing side is performed via electrical connector means, the present invention is not limited to this, and the signal transmission and reception is performed by optical coupling. Also good. In this case, as a power source, a battery may be housed in the operation part of the scope, or the light from the light guide may be supplied by an element having photovoltaic force, such as a solar pond. . In each of the embodiments described above, a correction circuit means for correcting the temperature dependence of the light emission characteristics of the light source lamp 31 etc. may be provided.

Further, in each of the embodiments described above, a light source is installed outside the scope, but the present invention can also be applied to a scope in which an LED or the like that emits light sequentially or simultaneously in R, G, and B is housed inside the scope.

Note that different embodiments can be constructed by combining parts of the embodiments described above, and these also belong to the present invention.

[Effects of the Invention] As described above, according to the present invention, it is possible to form a signal processing means that performs signal processing corresponding to each type of color imaging scope, so that display can be performed on a color monitor. In addition, since the connection means for the signal connector is separate, there is no need for a signal processing switching means when the signal connector is shared.

[Brief explanation of the drawing]

1 to 10 relate to a first embodiment of the present invention, FIG. 1 is a perspective view showing the entire system of the first embodiment, and FIG. 2 shows the configuration of the imaging device main body in the first embodiment. Block diagram, Figure 3 is a schematic configuration diagram of an electronic scope using a color mosaic filter, Figure 4 is a schematic configuration diagram of a fiber scope equipped with a frame-sequential TV camera, and Figure 5 is a diagram of a TV camera using a color mosaic filter. Figure 6 is a schematic diagram of the fiber scope with station names, Figure 6 is a diagram of the outline diagram of the fiber scope, Figure 7 is a block diagram showing the configuration of the field sequential process circuit, and Figure 8 is the configuration of the color mosaic type process circuit. 9 is an explanatory diagram showing the configuration of the type signal generation circuit, FIG. 10 is a circuit diagram showing the configuration of the identification circuit, and FIG. 11 is a perspective view showing another embodiment of the connector means.
FIG. 12 is a configuration diagram not showing an output circuit in which the signal/q conversion part is shared in the second embodiment of the present invention, and FIG. 13 is a circuit diagram showing scope identification means for identifying a connected scope.
FIG. 14 is a block diagram showing another embodiment of the scope identification means, FIG. 15 is a block diagram showing an output circuit equipped with a signal processing function in a third embodiment of the present invention, and FIG. FIG. 17 is a configuration diagram showing a modification of the image pickup device main body in the fourth embodiment of the present invention, FIG. 18 is a perspective view showing the connector means in the fourth embodiment, and FIG. Is there an enlarged view of the light source part in the example? 1M! 20 is a block diagram of the imaging device main body in the fifth embodiment of the present invention, FIG. 21 is a block diagram showing an enlarged view of the light source part in the fifth embodiment, and FIG. FIG. 23 is a perspective view showing an example of the system of the sixth embodiment; FIG. 24 is a perspective view showing the rotary filter means in the sixth embodiment; FIG. 25 26 is a perspective view showing a part of the rotary filter means in a rotating state, FIG. 26 is a perspective view showing a system according to a modification of the sixth embodiment, and FIG. 27 is a perspective view showing a system according to a modification of the sixth embodiment. A configuration diagram of the imaging device main body,
FIG. 28 shows a configuration diagram of an image carrier according to another modification of the sixth embodiment. 1... Endoscope imaging device 2A... Field sequential electronic scope 2B... Color mosaic electronic scope 2C... Field sequential TV camera Fiberscope 2D... Color 1149 type TV Fiber scope with camera 2F...Fiber path"-P3...Imaging device body 5A, 5B, 5G, 5D, 5E...Light source connector 6Δ, 6B, 6C, 6D...Signal connector 8C...
・Field sequential type TV camera 8D...No'' Ramojik type TV camera 11a, Il
b...Light source connector receiver [Plugs 12a, 12b...For signals] Connector receiver () 13...Color monitors 15a, 15b...Light source sections 26a, 26b...Drivers 28a, 28b... Identification circuit 4'1a, 41b...Process circuit 4/Ia...Multiplex circuit 44b...Reverse 71~Mix circuit 45a, 45b-N 1-3Cen]-da 5o
- -Procedure 7 City official document (spontaneous) January 12, 1988 Japan Patent Office Commissioner Mr. Kunito Ogawa 1″71, Indication of case 1988 Special revised application No. 61682 2, Title of invention Endoscope imaging device 3. Relationship with the case of the person making the amendment Patent applicant representative Satoshi Shimoyama Dept. 5. Date of amendment order] (Spontaneous) 6. Subject of amendment Drawings (Figures 1 to 28) 7
, Contents of amendment
Attachment d3 (no change in content)

Claims (1)

[Claims] A field sequential scope that performs color imaging using a field sequential illumination method, a mosaic scope that performs color imaging using a color mosaic filter, a video signal processing means that performs signal processing for each scope, and at least a signal connector portion. What is claimed is: 1. An imaging device for an endoscope, characterized in that a field-sequential type scope and a mosaic type scope connection means are provided separately.