JPS63229026A - 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 APPLICATION FIELD The present invention relates to an endoscope imaging device that can identify the imaging method of a connected scope and display output signals on a color monitor. [Prior Art] In recent years, an optical type II (also called a fiberscope) has been replaced by an optical type II (also called a fiberscope) in which an optical image formed by an objective lens at the distal end of the insertion section is transmitted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. , the optical image formed by the objective lens is photoelectrically converted by a charge-coupled device (hereinafter referred to as CCD) on the customer's solid-state image sensor, converted into an electrical signal, and transmitted to the hand side.
Electronic endoscopes (hereinafter also referred to as electronic endoscopes or electronic scopes) that can be displayed on a color monitor via a video processor equipped with a video signal processing means have come to be realized. The electronic scopes mentioned above are currently used for the upper or lower gastrointestinal tract, and are approximately 10 mm in diameter. However, for example, an endoscope for the bronchus usually requires an endoscope of around 5φ or less, and in order to realize an electronic scope for the bronchus (small diameter), it is necessary to use an l1ta image element with a small number of pixels. I don't get it. When the number of pixels mentioned above is small, rather than using a color imaging method that uses a color mosaic filter to prevent deterioration of resolution marks, the illumination method uses light of each wavelength of red, blue, and green in a sequential manner. The most popular method is a field-sequential color image transfer system in which images are taken sequentially, and these images are combined and displayed in color. −・
On the other hand, if the diameter can be made large, the number of pixels is too large, and a sufficient resolution can be obtained, a seven-sample color imaging method using a mosaic filter may be adopted. In the case of the above-mentioned electronic scope, in addition to the light source device used in the fiber scope, a video processor is used which performs signal processing and generates a video signal that can be displayed in color on a monitor. By the way, in the conventional example, the light source device for the fiber scope or the video processor 4 and the light source device for the electronic screen cannot be shared because it is used only for the fiber scope or the electronic screen. Further, in the electronic screen, different signal processing must be performed for different color imaging systems, and a video A processor and a light source device are required for each. For this reason, a system has been proposed in which an 'a image adapter is connected to a fiberscope and images can be displayed on a color monitor screen, as disclosed in, for example, Japanese Unexamined Patent Publication 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, but when connected to a control device (which integrates a video processing tree and a light source device), it performs color imaging in a frame-sequential manner. Color display can be performed by imaging. The above system has a disadvantage in that a color mosaic type electronic screen cannot be connected and used. or,
Since only the frame sequential method described above can be used, it is desirable to use a color mosaic type electronic screen when photographing a moving subject, but it cannot be used selectively. [Problems to be Solved by the Invention] Even if the above-mentioned drawbacks are solved, the two family color imaging systems still have the following problems:
Since the video signal processing systems are different, the output ends will be different. Therefore, when displaying on a color monitor, there is a drawback that the color monitor must be connected to the output end of a video signal processing system compatible with the color imaging method of the electronic scope used. The present invention has been made in view of the above-mentioned points, and an object of the present invention is to provide an endoscope imaging device that can handle different color imaging methods without changing the connection of the color monitor. do. [Means and operations for solving the problems] In the present invention, in an endoscope image carrier having two image processing systems provided corresponding to color imaging blocks of different systems, A means for identifying type signals output from different color imaging scopes is provided.The switch can be changed according to the color imaging method of the scope to be connected, and the output signal can also be used for types of signals output from different types of scopes. [Example] The present invention will be specifically explained below with reference to the drawings. -5= Figures 1 to 11 show the first embodiment of the present invention. Accordingly, Fig. 1 shows the configuration of the main body of the image carrier with a field-sequential type electronic scope connected to it, Fig. 2 shows the entire system of the first embodiment, and Fig. 3 shows the structure of the mosaic type electronic scope. Fig. 4 shows the structure of a field-sequential external camera (=j) fiberscope, Fig. 5 shows the structure of a mosaic type TV camera equipped with a ``Noaibascope,'' Fig. 6 shows FIG. 7 shows the structure of the fiberscope, FIG. 7 shows the structure of the field sequential process circuit, FIG. 8 shows the structure of the mosaic process circuit, FIG. 9 shows the structure of the signal conversion output circuit,
Figure 10 shows the structure of a type information generator circuit;
The figure shows the configuration of the identification circuit. As shown in FIG. 2, the endoscope imaging device 1 of the first embodiment includes various scopes (endoscopes') 2A and 2B. It has an imaging device main body 3 that can be connected to any of 2C, 2D, and 2F. As shown in Fig. 2, there are five types of scopes, namely, a field sequential electronic scope 2A,
Electronic scope using a color tsaic filter (hereinafter referred to as a blade ramori ike type electronic scope or mosaic type electronic scope t0) 2B,
Fiberscope with externally attached field-sequential TV camera (hereinafter referred to as "fiberscope with field-sequential TV camera") 2C1 Fiberscope with externally attached mosaic-type TV camera (hereinafter referred to as (color) fiberscope with mosaic-type TV camera) There are 2D and fiberscope 2E. Each scope 2A. 2B, 2G, 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 5Δ, 5B are provided at the tips of the universal cords. 50.5D and 5F are provided respectively. In this case, in the field-sequential type electronic scope 2A and the color mosaic type electronic scope 2B, signal connectors 6A and 6B are provided in addition to the light source connectors 5A and 5B at the tip end side of the cornive cord. In addition, the fiberscope 2C with a field-sequential TV camera and the fiberscope 2D with a color mosaic TV camera have a field-sequential TV camera 8C and a color mosaic TV camera 8 in the eyepiece 7 of the fiberscope 2F.
D has a configuration in which each TV camera 8 is installed.
A signal connector 60.6D is attached to the tip of the signal cable extending from C and 8D. Each of these scopes 2
Connectors 5A, 6△: 5B, 6B: 5C, 6C: 5D, 6D:
5E and set each scope 2 in a usable state, two sets of connector receivers are provided on the front surface of the housing of the imaging device main body 3, for example. These connector receivers include a connector receiver 11a for a field sequential light source, a connector receiver 12a for a field sequential signal, and a connector receiver 12a for a white light source.

[P11
b, Color mosaic type signal Y) ■] Connector receiver 12b. The connector receiver 11a for the field sequential light source is equipped with a field sequential electronic system]-72A and a field sequential TV camera equipped fiber scope 2C (these two scopes 2A and 2G are also referred to as the field sequential scope 1°). The shape is such that the light source connectors 5A and 5C can be connected to each other. In addition, the screen sequential type signal connector receiver 12a adjacent to the lower side of the screen sequential type light source connector receiver (P11a) includes a screen sequential type electronic scope 2A, a screen sequential type fiber scope with a screen sequential TV camera 2C1, that is, a screen sequential type scope. The connectors 6A and 6C for signals 2A and 2G of the same shape can be connected to each other.On the other hand, the connector receiver Ilb for the white light source has the connector 5B for the light source of the color mosaic electronic scope 2B, and the connector 5B for the light source of the color mosaic type TV. These connectors 58.5D, 5E has the same shape. Also, this white light source connector holder (color mosaic type credit opening connector holder [) 12 adjacent to the lower side of the plate 11b]
b is for the color mosaic electronic scope 2B signal.
These -1 connectors 6B and 6D have the same shape so that they can be connected to the connector 6B and the signal connector 6D of the fiberscope 2D with a collar [swik type TV camera]. When the fiber scope 2 [ mentioned above is connected and used, it is observed with the naked eye, but other scopes 2A. When 2B, 2C, and 20 are used, the captured image can be displayed in color using a color monitor 13 connected to the signal output terminal of the imaging device main body 3. In addition, the light source connector 5Δ in each scope 2. 5B, '50.5D, and 5E are lines 1 to 5E in this example.
Along with the guide connector, the air/water supply connectors are installed, and the connector receivers 11a and 11b are also designed to connect these. The internal configurations of the scopes 2A, 2B, 2C, 20, and 2E are shown in FIGS. 1, 3, and 4, respectively. It is shown in FIGS. 5 and 6. A light guide 14 formed of a fiber bundle that transmits illumination light is inserted through each sprue 2, and outputs the illumination light supplied to the incident end surface from the light source section 15a or 15b in the imaging device main body 3. The light is transmitted to the tA end surface side, and the light is transmitted to the front subject side with illumination through the light distribution lens 16 arranged in front of the GW surface. Furthermore, in each scope 2, an objective lens 17 for imaging is arranged at the distal end of the insertion section 3. A CCD 18 is disposed on the focal plane of the objective lens 17 in both the field-sequential or color mosaic scope 2A or 2B, while the fiber optic 2E, TV camera 8C or 8D
Fiberscope 2G or 2 with TV camera attached
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 surface of the image guide 19. However, fiber scope 2
In F, the eye is brought close to the eyepiece 7 so that observation with the naked eye can be performed. On the other hand, a frame-sequential TV is installed in the eyepiece 7 of the fiberscope 2E.
In a camera equipped with a camera 8C or a color mosaic TV camera 8D, a C0D 22 is placed opposite the eyepiece 21 (through an imaging lens not shown). In addition, color mosaic electronic scope 2B
Alternatively, a color mosaic filter 23 is arranged in front of the imaging surface of the CCD 18 or 22 used in the color mosaic type TV camera 8D. Each CCD 18 or 22 forming the image carrying means photoelectrically converts the optical image formed on the imaging surface, and after being amplified by the preamplifier 24, it is transmitted to the signal connector 6 (6A, 6B, 6C, 6D) via the signal transmission line. ) side, and the signal connector receiver 12a or 12b to which the connector 6 is connected
The video is input to the video processor 25a or 25b via the video processor 25a or 25b. Also, each CGD 18 or 22 has a video blower 25.
A CCD driving clock is applied from a COD driver (also simply referred to as a driver) 26a or 26b forming a or 25b. In addition, a type signal generation circuit 27A that outputs a type signal for scope identification is provided to the probes other than the fiber scope 2F.
, 27B, 27G, and 27D are the designations, and are identified by the identification circuit 28a or 28bT'' in the imaging device main body 3 via the signal connector 6. By the way, the imaging device can be connected to any of the scopes 2 described above. The main body 3 includes two sets of light source parts 15a, 15b and two silk video filters 25a, 2 shown in FIG.
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 one surface of the light guide 14 attached to the light guide 14. The other light source section 15b is a white light source, and is configured such that the white light from the white lamp 31b is condensed by a condensing lens 34b so that the white light source connector receiver 11 bk:IJ<
The light guide 14 attached to this connector receiver 11b
white light is supplied to the incident end face of the By the way, one of the video processors l+25a is for frame sequential signal processing, and the signal input to the signal input terminal of the frame sequential signal connector receiver 12a is input to the frame sequential process circuit 41a. The signals captured under the illumination light of each wavelength of R, G, and B are called color signals R,
They appear as G and B. Therefore, the color signals R, G,
B is input to a common signal conversion output circuit 42. This signal conversion output circuit 42 is connected to R as shown in FIG.
It has a GB (three primary color signal) input terminal and a luminance color difference signal input terminal, and the signal input from the RGB input terminal is 71
The helix circuit 43 outputs the luminance signal Y and the color difference signals R-Y, B.
- Converted to Y. These signals Y, RY, and B-Y are applied to the - contact of the changeover switch 44. The signal that has passed through this changeover switch 44 is input to an NTSC encoder 45, where it is converted into an NTSC composite video signal, and is passed through a buffer 46 that forms a driver to an NTSC encoder 45.
It is output from the SC output terminal 47. Further, the signals inputted to the R, GB input terminals pass through a changeover switch 48, three buffers 49 forming a driver, and RGB three primary color signals are outputted from an RGB output terminal 50. On the other hand, the signal input to the luminance/color difference signal input terminal is input to the inverse matrix circuit 51, where it is converted into three primary color signals RGB, and is applied to the other contact of the switch/14. Ru. The output of the inverse matrix circuit 51 is applied to the other contact of the changeover switch 48. The signal conversion output circuit 42 is a field sequential process circuit 4.
1a and a mosaic type process circuit 41b, respectively, and by switching the signal selected by a changeover switch 44, 48, it is possible to output from a common NTSC output terminal 47 or an RGB output terminal 50. This is its characteristic. The changeover switches 44 and 48 are configured, for example, by analog switches, and are automatically changed over by a changeover control signal from the identification circuit 28a. That is, normally, the re-switching switches 44 and 48 are set to select the color mosaic type signal processing system, and when the frame sequential type scope 2A or 2C is connected, the type signal is determined by the identification circuit 28a. , 11 I”I
A switching control signal I is applied to the control end of the analog switch to switch to a state where the frame sequential signal processing system side is selected as shown in FIG. A rotational position sensor 52a 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 timing of the clock of the timing generator 53a by the rotating filter 33a. The output of the timing generator 53a 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 bold circuit 54, sampled and held, and then γ-corrected by the γ-correction circuit 55 and sent to the A/D converter 56.
is converted to digital data. Thereafter, the signal imaged under the sequential illumination of R, G, and B via the multiplexer 57, which is switched by the signal from the timing generator 53a, is transferred to the R frame [58R, G frame memory 58G, B frame memory 588]. into: into. Each of these frame memories 58R, 58G, 58
The signal data written in B is simultaneously read out, converted into analog color signals R1G and B by the D/A converter 59, and outputted to the matrix circuit 43 described above. On the other hand, C via the color mosaic signal connector 12b.
The signal carried by the CD 18 or 22 is input to a color mosaic wrestling circuit 41b, and a luminance signal Y and color difference signals RY and BY are output. However, the signal is TN
The signal is input to the SC encoder 45, converted into an NTSC composite video signal, and outputted from the NTSC output terminal 47. The color signals R, G are also input to the inverse matrix circuit 51, and the color signals R, G
, B, and output three primary color signals RGB from the three primary color output terminals 50 through the buffers 49 forming a driver. Incidentally, the color mosaic process circuit 41b, for example, as shown in FIG.
The signal from the CD 18 (or 22) passes through the ix signal processing circuit 61 to generate a luminance signal Y. The color difference signals R-Y and B-Y are also inputted to the color signal reproduction circuit 62 and generated time-series for each horizontal line, white balance compensated by the white balance circuit 63, and one is directly input to the analog switch 64. , the other one is delayed by one horizontal line by the 1 to 1 delay line 65 and input to the analog switch 64', and the color difference signal R-Y is inputted by the switching signal of the timing generator 53b.
, B-Y are obtained. Note that each timing generator 53a, 53b applies a signal to the COD drive 26a, 26b, respectively, and
Control is performed so that signal processing is performed in synchronization with the drive pulse used to read signals from the CD 18 or 22. In this case, in the frame-sequential video recorder 25a, the timing generator 53a is synchronized with the rotation filter 33a by the output of the rotational position sensor 52a. Note that the NTSG encoder 45 operates in synchronization with the timing generator 53a or 53b. By the way, the identification circuits 28a and 28b identify the connected scope by the type signal, and when the wrong scope is connected, they operate the warning circuits 66a and 66b, and issue a warning with a buzzer or an LED. It is designed so that it can warn you by flashing. For example, the signal connector 6B or 6 of a color mosaic type electronic screen 2B or a color mosaic type TV camera equipped fiber scope 8D is attached to the frame sequential type signal connector receiver 12a.
When D is connected, it is determined that the system is not of the field sequential type, and the identified signal activates the warning circuit 66a to notify the user by making a warning sound with a buzzer or flashing an LED. be. Also, when the connector 6A of the screen sequential type electronic screen 2A or the connector 6C of the screen sequential type electronic screen 2C is connected to the connector receiver 12b for color mosaic type signals. The identification circuit 28b identifies this, and the warning circuit 66b issues a warning. On the other hand, if the connector receiver 6A or 6C of the frame sequential type scope 2A or 2C is connected to the frame sequential type signal connector receiver 12a, no warning is given. (If the connection is correct, L
It may be displayed by lighting up the ED. ) Similarly, when the connector receiver () 6B or 6D of the color mosaic scope 2B or 2D is connected to the color mosaic connector receiver 12b, the warning circuit 66b does not operate. (It may be possible to identify that the connection is correct and indicate this by lighting an LED in a different position or color than in the case of a warning.) An example of a type signal generation circuit and identification circuit that performs the above operation. are shown in FIGS. 10 and 11. The type signal generation circuits 27A and 27B are connected to two terminals 82 and 82 connected to the signal connectors 6Δ and 6B, for example.
One is connected by a resistor RO of an appropriate value (for example, 220Ω), and the other is short-circuited by a conducting wire 83. On the other hand, the identification circuit 28a connects the two terminals 82 as shown in FIG.
．． One input terminal 85 of the input terminal 85 connected to 82 is connected to, for example, a +5V power supply terminal, and the other input terminal 85 is connected to the non-inverting input terminals of comparators 86 and 87, and It is grounded via a resistor RO. A voltage V1 of, for example, 3 to 4 cm is applied to the inverting input terminal of one comparator 86 by a reference voltage source, and a voltage V1 of, for example, 1 to 2 cm is applied to the inverting input terminal of the other comparator 87 by a reference voltage source. Voltage ■2 is applied. Thus, the output of one comparator 86 passes through an inverter 88, and together with the output of the other comparator 87, passes through a two-man AND circuit 89 to output a frame-sequential scope identification signal from the first output terminal 91. In addition, both the comparators 86
．． The output of 87 is led to a second output 9it 93 via a two-man AND circuit 92. The first output end 91 is connected to the field sequential scope 2A or 2.
When C is connected, it outputs a signal of "l-1" so as to perform frame-sequential illumination and signal processing. On the other hand, the second output end 93 has a surface-sequential connector socket [No.
If the signal connector 6B or 6D of the mosaic scope 2B or 2D is mistakenly connected to the mosaic type scope 2a, it will emit a warning command signal and output a warning command signal. By replacing the two output terminals 91 and 92, it can be used as the identification circuit 28b of the mosaic type Shintan processing system.The type signal generating circuit 27C of the frame sequential type TV camera 8C is the 10th type signal generating circuit 27C.
The type signal generating circuit 27D of the mosaic TV camera 8D is the same as that shown in FIG. When the two comparators 86 and 87 are connected, the comparators 86 and 87 become L'' and ``l-1'', respectively (if not connected, both are L11), and the output of the first output terminal 91 becomes ``Tobi''. On the other hand, when the connector on the mosaic scope side is connected, the outputs of both comparators 86 and 87 become II HII, and the output of the second output terminal 92 becomes "H". According to the first embodiment, the light source section 15a for a field-sequential scope and the field-sequential video processor'
v25a and light source section 15 for color mosaic scope
b and the color mosaic type video processor 25b, and the connection means for each scope is set up.
, 2D is connected, the illumination light and signal processing corresponding to the connected scope can be supplied and the subject image carried by the scope can be displayed on the color monitor 1.
3 can be displayed in color. In this case, in the first embodiment, the signal output terminal is set to the common output terminal 47° 50 for both the frame sequential type and the color mosaic type, and switches 44 and 48 are installed in the signal conversion output circuit 42.
By controlling the switching of these switches 4.4 and 4.8 with identification means for identifying the connected scope, the output signal which has undergone signal processing corresponding to the connected scope can be transmitted to these switches. /14.48 to the output end 47°50. Therefore, even if the connected scope is of a different color imaging system, color display can be performed on the color monitor 13 without changing the connection of the color monitor 13 to the imaging device. Note that the output formats of the signals after -[signal processing performed for the above two color imaging systems-] are the same. = 23 In other words, the same color monitor 13 can be used because both output the three primary colors or match the NTSC'tJ set of video signals. (This color monitor may be one that supports three primary colors or one that receives NTSC video signals manually.) When using the fiberscope 2F, connect its light source connector 5E to the white light source connector receiver 11b. This allows for visual observation. According to the first embodiment, the signal is automatically switched to one that has undergone signal processing that corresponds to the connected slave.
This has the advantage that no switching operation is required. Furthermore, two sets of connector holders 1 provided on the imaging device main body 3
If an incorrect scope is connected to the scopes 2a and 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, although only one imaging device main body 3 is provided, it can be used with a color imaging type scope, and can also be used with a fiber scope 2E at the same time. In addition, the IC provides a warning if a wrong connection is made, making it an easy-to-use device. Note that a warning may also be issued when two signal connectors are connected to both signal connector receivers 12a and 12b at the same time. Furthermore, a light source connector connection detection means can be provided inside the field sequential light source connector receiver 11a, so that when the connector 5F of the fiber path 12F is connected, it is possible to notify that the connection is incorrect. In other words, the connector receiver [
It is possible if the connector 5F is connected to the connector 11a, and if neither of the connectors is connected to the signal connector receivers 12a and 12b, a warning is issued if the connector 5F is not connected. Note that when a TV camera 8C or 8D is installed on the fiber scope 2E, the image will be transferred and displayed on the color monitor 13, but if the TV camera 8C or 8D is removed, it will be possible to confirm that it is in the removed state. -25= may be displayed on the screen of the color monitor 13. It goes without saying that if the connector 6 (connector receiver 12) has a different shape between the field-sequential type and the mosaic type, erroneous connections can be eliminated. In addition, in the first embodiment, both changeover switches 44 and 48
It is also possible to switch manually. FIG. 12 shows scope identification means in a second embodiment of the present invention. 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 curved sequential type connector receiver is provided with a recess into which this pin 102 can be inserted. Therefore, -m holes 103, 1 are provided on opposite sides 1 of this recess.
03 i installation, light emitting means such as 1aD104, etc.
~A light receiving means such as a transistor 105 is arranged, and the output of the phototransistor 105 serving as the light receiving means is inputted to a discrimination circuit formed by a comparator 106 and the like. Above LE
DI02 is supplied with current from, for example, a 5V power source via a resistor R. Further, the phototransistor 105 has its collector connected to +5V via a resistor R, and its emitter connected to ground. Further, this collector is connected to the non-inverting input terminal of the comparator 106, and the voltage v connected to the inverting input terminal is connected to the comparator 106.
It is compared with 1. This voltage V1 is set to, for example, 2 to 3 cm, and since eight phototransistors 105 are normally connected, the output J of this comparator 106 is L°. Therefore, when the pin 102 is engaged in the recess, the LED1
04 is blocked, the output of the phototransistor 105 becomes "'H", and this output change
6, and its output becomes H'' to identify the scope to be connected or to change over the changeover switches 44 and 48. Incidentally, when the output of the phototransistor 84 serving as the light receiving means is 1111, the color modifier type process circuit side is selected. By providing the identification means shown in FIG. 12 also for identifying a 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. 13 shows an imaging device main body 1 in a third embodiment of the present invention.
11 is shown. In this embodiment, in the imaging device main body 3 shown in FIG.
The electronic scope 2 has a common signal input terminal. The signal connector receiver 72, which is common to the light source side connector receivers 71a and 71b of the imaging device main body 111 in this embodiment, has the shape shown in FIG. Both the connector 73B of the electronic scope 2B and the signal connector part can be connected to the common signal connector receiver 72,
In addition, the light source side connector portions can be connected to light source connector receivers 71a and 71b provided above and below, respectively. Similarly, the light source connector 74 and signal connector 75A of the scope 2c with a screen sequential type TV camera or the mosaic type TV
The same applies to the connectors 74 and 75B of the camera-equipped scope 2D. Furthermore, the connector 74 of the fiber scope 2E can be connected to the connector receiver 1b on the white light source side. The internal configuration of the imaging device main body 111 is as shown in FIG. As shown in FIG. 13, the output signal from the type signal generating circuit (for example, 27A), which is input to the common identification circuit 28 via the common signal connector receiver 72, is connected by this identification circuit 28. Determine the scope. This identification circuit 28 includes the J driver 26a of the first embodiment,
In addition to controlling 26b, a newly installed changeover switch 11
Controls the switching of 3. For example, when the field sequential type scope 2Δ or 2C is connected as shown in FIG. The signal is input to a frame sequential process circuit 41a. On the other hand, if the field sequential type scopes 2A and 2G are not connected, the mosaic type process circuit side is selected. In addition, if the mosaic type scope 28.2D is not connected, the mosaic type process circuit side is selected.If the mosaic type scope 2B or 2D is detected, the selector switch 103 is turned on. It may also be possible to switch sides in a mosaic style. The identification circuit 28 also sends a control signal to the shared timing generator 53, so that it can handle either method. Further, in this embodiment, the signal that has passed through the process circuit 41a or 41b is transmitted to the signal conversion output circuit 42 shown in FIG.
is used. Accordingly, the output of the identification circuit 28 causes the changeover switches 44 and 48 (see FIG. 9) to be switched in conjunction with each other. For example, field sequential scope 2Δ
Or, if it is identified as 2C, the switch is made to the frame sequential side shown in FIG. The rest of the structure is the same as that of the first embodiment. In the embodiment shown in FIG. 13, for example, the light source lamp 15b may be made movable so that the twelve light source sections 15a and 15b shown in FIG. 13 can be formed. Also, two light source lamps 31a. 31b may be provided on both sides passing through the center of the rotating plate, and may be used as an auxiliary light by being able to be replaced by rotating the plate. In this embodiment, as in the first embodiment, if the light source connector of the fiber scope 2E is connected to the imaging device main body 111, observation with the naked eye can be performed. In addition, when only the connector 74 of the fiber scope 2E is connected to the white light source connector receiver 71b, it is possible to display that the eye bus scope 2E is connected on the monitor by providing a means for detecting the connection. good. In the third embodiment, the signal connector receiver 72 is common, but it may be separate as shown in FIG. FIG. 15 shows the main parts of a video processor in a fourth embodiment of the present invention. In this video processor, in the signal conversion output circuit 42 shown in FIG. 9, an edge enhancement circuit 114 is inserted to perform edge enhancement signal processing on the varicella signal switched by the changeover switch 44. ing. Although the other changeover switch 48 shown in FIG. 9 is not provided, it may be provided. The rest is the same as that shown in FIG. 9 above. According to this embodiment, edge enhancement is performed in common for different brightness and signals in the two methods, so the number of parts can be reduced compared to when two sets are provided for each method. The configuration is also easier. Moreover, costs can be reduced. In FIG. 15, signal processing for edge enhancement (horizontal or vertical or both) is performed, but in addition to this, the NTSC encoder 45 and the inverse matrix circuit 51 are also used. Furthermore, a line interpolation circuit or an auto gain control circuit may be provided in place of the contour enhancement circuit 112. As a roughly shared circuit, for example, a frame memory, a still image memory, a color burst generation, a power supply, a character generator, a superimpose circuit, a keyboard controller, a color tone adjustment circuit, etc. may be used. FIG. 16 shows a modification of FIG. 15. That is, in the circuit shown in FIG. 15, signal processing for edge enhancement is performed on both frame-sequential and Mojik type signals (bright skin signals), but the signal processing section shown in FIG. 121 allows selection of signal processing such as edge enhancement, and prevents signal deterioration when signal processing is not performed. For this reason, the matrix circuit 4
Switches SW1 and SW2 are provided before and after the signal processing section 121 at the subsequent stage of the signal processing section 3. In addition, mosaic process circuit 4
The way 1b comes out is the switch SW on the output side of switch SW2.
3 and then input to the NTSC encoder 45. When the signal that has passed through the signal processing section 121 is output from the RGB output terminal, it passes through the switch SW4,
It passes through the inverse matrix circuit 51 and further passes through the switch SW5.
It is output after passing through. In addition, the switch SW5 is turned on to prevent signal deterioration when the RlG and B signals of the frame sequential process circuit 41a are returned to the R, G and B signals through the matrix circuit/I3 and the inverse 71-rix circuit 51. R, G, and B three primary color signals can be output directly from the RGB output terminal. Each switch SW1 to SW in a modified example not shown in FIG.
Whether signal processing is performed in state 5 (on) or not (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 luminance signal Y and the light difference signal R-
I am trying to perform signal processing on Y and B-Y, but
Signal processing may be performed only on the r4 degree signal. Furthermore, in the single circuit shown in FIG. 9, luminance signal processing and signal processing for each of the R, G, and B color signals may be performed after each changeover switch. = 34- Fig. 17 shows the external shape of the sixth embodiment of the present invention. In this embodiment, an imaging device main body 131 has a light source section 132 and a video processor section 133 separated from each other. As shown in FIG. 17, a light source connector socket 134 is provided on the lower front side of the light source section 132, while a signal connector socket 134 is provided on the upper front side of the video processor section 133.
35 are provided, and these both connector receivers 134, 1
Is 35 a video tape? The light source section 1 is placed on the upper surface of the
32 are arranged so that when stacked, they will be in vertically adjacent positions. On the other hand, the connector 137 of the field-sequential electronic scope 2A has its light source connector part and signal connector part integrated, and the light source part 132 and video processor part 133 are overlapped as shown in FIG. can be connected to connector receivers 134 and 135. On the other hand, for example, the connector of the Mojik type electronic screen 2B is divided into a light source connector 138 and 13 -1 signal connectors, and the connectors 138 and 139 can be connected to connector receivers 134 and 135, respectively. Further, for example, in the field-sequential TV camera fiberscope 2C, the light source connector 138 and the signal connector 140 can be connected to the connector receivers 134 and 135, respectively. Incidentally, the light source section 132 has a rotary filter section 143 that is movable along rails 144, 144, as shown in FIG. The rotary filter section 143 is usually mounted on a rail 144.1.
For example, as shown in FIG. 18, a white light source section is formed in a state in which the rotating filter 33 is retracted from the optical path of the light source lamp 31 and lens 34. state. On the other hand, from this state,
When the rotary filter section 143 is moved to the lower side of the rail 144.1/I/I, it is interposed in the optical path as shown in FIG. 19J, and a field sequential light source section is formed. By the way, the rotary filter section 143 is connected to the movement control circuit 1.
The movement is controlled by the movement control circuit 1
45 is activated by a connection detection signal from the connection detection circuit 150 (4). In this embodiment, when the connection detection circuit 150 detects that the cable 151 is connected between the light source section 132 and the video processor section 133, it outputs a movement control command to the movement control circuit 145, and then outputs a movement control command to the rotation filter section 1713.
is moved from the state shown in FIG. 18 to the -4 state shown in FIG. - If you use the mosaic type connector 2B or 2D by connecting it, the rotary filter section 143 will not be moved because the group 151 is not connected.
White light is provided. Also, when the fiber scope 2F is inserted, white light is supplied to the connector of the fiber scope. Incidentally, when the use with the field-sequential scope 2A or 2C is finished and the couple 151 is removed, the rotating filter section 143 is returned to the state where it is retracted from the optical path. By the way, the light source section 132 includes a rotational position sensor υ52.
Connector 1 of cable 151 for transmitting the output of a to the timing pulse generator 53 side in connector 133.
A connector receiver 153 is provided to connect one of the connectors 52 and 15, and the video processor section 133 is similarly provided with a connector receiver 153. Further, the light source section 132 is provided with a connection detection circuit 150 that detects whether the connector 152 of the signal cable 151 is connected to the connector receiver 153, and as shown in FIG. 19, when the cable 151 is connected, The output of this circuit 150 outputs a movement command signal to the movement control circuit 145, and the rotating filter section 143 is moved along the rails 144, 144, and the rotating filter 33a is interposed in the middle of the illumination optical path to perform frame-sequential illumination. We are making it possible to do this. On the other hand, a connection detection circuit 155 is provided in the video processor 81i 133 to detect whether or not the connector 152 of the cable 151 is connected to the connector receiver 153, and the output of this detection circuit 155 is input to a warning circuit 66. Therefore, this worn-out circuit 66 detects that the cable 151 is not connected from the connection detection circuit 155 while the identification circuit 28 detects that the field sequential scope 2A or 2C is connected. When a signal is input, cable 1
51 is not connected, a warning buzzer 156, a warning buzzer 157, etc. are used to warn. In addition, mosaic scopes 2B and 2D are installed on the signal connector holder [P135].
A warning is also given when the signal connector 139 of The timing pulse from the light source section 132 via the cable 151 is outputted as a control signal to a driver or the like via a pulse generator 53 in the video processor section 133. In this embodiment, the changeover switch 113 is turned on in sequence based on the output of the connection detection circuit 155, that is, the output that detects that the cable 151 is connected between the light source section 132 and the video processor 4 section 133. The expression is switched so that it is selected. Of course, in the example shown in FIG. 13, J: sea urchin,
The output of the identification circuit 28 may also be used. The other configurations of the video browser section 133 are the same as those shown in FIG. 13. In this embodiment, since it is a separate body, it can be lightweight and convenient for moving. Further, when used only with the fiber scope 2E, the video processor section 133 becomes unnecessary, and there is an advantage that only the light source section 132, which is required in this case, can be used. In addition, the signal conversion output circuit 4
In place of circuit 2, a circuit 113 shown in FIG. 15 may be used. FIG. 20 shows the main part of a sixth embodiment of the present invention. This embodiment is based on an imaging device main body 161 having a structure in which the separate light source section 132 and video processor 133 shown in FIG. 19 are integrated and the connection detection means is removed. Also, no warning means are provided. In this embodiment, each scope 2 (mosaic type electronic scope 2B in FIG. 20) has a type signal generation circuit 2.
7 is not provided, and when the switching control circuit 162 identifies that the connected scope 2 is a frame sequential type, the light source state of the frame sequential type and signal processing of the frame sequential type are performed. The switching control circuit 162 is connected to the frame sequential type scope 2A or 2.
When the mosaic scope 2B or 2D is connected to the mosaic scope 2B or 2D, the movement control circuit 145 is controlled to set the frame-sequential illumination state for discrimination, and the switch 113 is set to the frame-sequential signal processing system. Set so that it is selected. By the output of the sensor V52a, the illumination state of, for example, red is terminated, and the image pickup signal in that illumination state is read out from the frame memory 58R in the frame sequential process circuit 418, as shown in FIG. As shown, the signal is input to a comparator 163 forming a switching control circuit 162 via a D/A converter 59, and is compared with a reference level V. This LS quasi-level V is set slightly larger than the dark current (zero) level, and when a signal obtained by VD image of a general subject such as inside a body cavity is input, the output of this comparator 163 is ll ll Become an IT person. However, in the case where the mosaic filter 23 is installed in front of the image plane of the CCD 18 or 22, the output of pixels other than the red transmission filter is almost at the dark current level, and therefore becomes 11111. Therefore, the ROM which stores the output of this comparator 163 and data corresponding to the arrangement pattern of the red transmission filter
164 is input to a digital comparator 165, and the output is discriminated by a discriminating unit 166 formed by a CPU or the like.
D, or the field sequential type scope 2A or 2C which does not pass through a mosaic filter. The output of this discrimination section 166 switches the switch 113,
It switches the switches 44 and 49 in the signal conversion output circuit 42 and controls the movement control circuit 145. Note that the red array pattern information of the mosaic filter is read out from the ROM 164 using the address signal output from the counter 167. When the binary signal outputted from the comparator 163 matches the red array pattern of the mosaic filter, the discriminator 166 switches the switch 113.44 so that the white illumination and mosaic signal processing system are activated. .49 is set, and the frame sequential illumination state and frame sequential signal processing system are selected if they do not match the red array pattern. According to this embodiment, it is possible to automatically determine whether the scope is a field sequential type scope or a mosaic type scope without providing a type signal generation circuit to the example scope. In this embodiment, a ROM 164 is provided for storing, for example, a red array pattern, but switching of switches etc. may be controlled by identifying that the output of the comparator 163 indicates a specific pattern. In addition, a horizontal drive signal is applied to the CCD 18 or 22 for a number of clocks equal to or greater than the number of pixels in the horizontal direction, and the number of clocks at which the output level reaches the dark current level is detected to determine the number of driver drive signals, frequency, etc. It can also be automatically set to an appropriate value. Further, although in the embodiment described in 1-3, the Molecule type and the field sequential type are identified and switched, the present invention can also be applied to a case where the number of pixels is identified and switched. In the above-described embodiment, the connector means on the light source side may be used in a field sequential type or mosaic type, and the signal side may be provided separately. Further, in the fifth embodiment, the light source section may be separated into a field sequential type light source section and a mosaic type light source section. Alternatively, a light source can be provided within 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, the output terminal of the video signal processing system for different color imaging systems is connected to the scope to which the color monitor is connected, and the output signal is processed according to the scope to which the output end of the video signal processing system is connected. Therefore, it is not necessary to convert the connection of the color monitor according to the color imaging method of the scope to be connected, and color display can be performed on the color monitor simply by connecting the scope.

[Brief explanation of the drawing]

1 to 11 relate to the first embodiment of the present invention, FIG. 1 is a block diagram showing the configuration of the image carrier main body in the first embodiment, and FIG. 2 is a block diagram of the structure of the image carrier main body in the first embodiment. A perspective view showing the entire system, Figure 3 is a schematic configuration diagram of an electronic scope that uses 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 that uses a color mosaic filter. A schematic configuration diagram of a fiberscope equipped with a TV camera, Figure 6 shows the fiber path] -
Figure 7 is a block diagram showing the configuration of a frame-sequential process circuit, Figure 8 is a block diagram showing the configuration of a color mosaic process circuit, and Figure 9 is a signal conversion circuit. FIG. 10 is a block diagram showing an example of a type signal generation circuit, FIG. 11 is a dimensional circuit diagram showing an example of an identification circuit, and FIG. 12 is a diagram showing a second embodiment of the present invention. FIG. 13 is a block diagram showing the main body of the imaging device in the third embodiment of the present invention, and FIG.
FIG. 15 is a configuration diagram showing a signal conversion output circuit in a fourth embodiment of the present invention; FIG. 16 is a configuration diagram showing a modification of FIG. 15;
FIG. 7 is a perspective view showing the external shape of the fifth embodiment of the present invention, and FIG.
The figure is a block diagram showing the light source section in the fifth embodiment, FIG. 19 is a block diagram of the image carrier main body in the fifth embodiment, FIG. 20 is a block diagram of the sixth embodiment of the present invention, and FIG. FIG. 3 is a configuration diagram of a switching control circuit. 1... Endoscope imaging device 2A... Field sequential type electronic scope 2B... Color mosaic type electronic scope 2C... Field sequential type fiber scope with TV camera 2D... Color mosaic type Fiber scope with TV camera 2F...Fiber scope 3...Imaging device body 5A, 5B, 5G, 5D, 5E...Light source connector 6A, 6B, 6G, 6D...Signal connector 8C...
・Frame sequential type TV camera 8D...Color mosaic type TV camera Lla, 11b
...For light source] Connector receivers 12a, 12b...Signal connector receivers (P13...Color monitors 15a, 15b...Light source parts 26a, 26b...Drivers 28a, 28b...Identification circuit 41a , 41b...Process circuit 42...Signal conversion output circuit 43...Matrix circuit 45...NTSC encoder 47...NTSC: Output end 50...RGB output 51...Inverse matrix circuit procedure Ne... Original book (method) June 22, 1988 1. Indication of the case 1988 Patent Application No. 61683 2. Title of the invention Endoscopic imaging device 3. Relationship between the person making the correction and i example Patent Applicant address 2-13-2 Hatagaya, Shibuya-ku, Tokyo Name (037) Olympus Optical Industry Co., Ltd. Representative Ministry Satoshi Shimoyama Department 4, Agent

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, and a field-sequential video signal processing means and mosaic system for each of the scopes. In an endoscope imaging device comprising a video signal processing means and a connection means to which each of the scopes can be attached, the switching means selectively guides the video signal passed through each of the video signal processing means to a common output terminal. and identification means for the scope to be connected, and by controlling the switching of the switching means by the identification means, the video signal that has passed through the video signal processing means on the side corresponding to the connected scope is sent to the output terminal. An imaging device for an endoscope, characterized in that the imaging device is adapted to be guided.