JP2686080B2 - Endoscope device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention performs photometry depending on whether forceps are within the field of view.
The present invention relates to an endoscope device. [Prior Art] In recent years, an elongated insertion part has been inserted into a body cavity or a lumen.
By diagnosing and inspecting the inside
The endoscopes that can be used are widely used. In addition, recently, the fiber bundle or relay optics
Instead of an optical endoscope equipped with a image guide, charge coupling
Solid-state imaging device (abbreviated as SID) such as a compound device (abbreviated as CCD)
Write. ) -Based electronic endoscope (electronic endoscope or electric
Also called a child scope. ) Has been put to practical use. In the above electronic scope, the interior of the body cavity is
Illuminated by the SID provided at the tip of the endoscope (scope)
A subject image is taken and displayed on the monitor. For the monitor image by the electronic scope or fiber bundle
By fiberscope with image guide by
The transmitted subject image is captured by a camera connected to the eyepiece.
Make sure the brightness is appropriate for the captured image.
Is equipped with a photometric means, and the photometric result by this photometric means
Control the amount of light based on the
The brightness was adjusted by controlling it. In addition, remove the treatment tool such as biopsy forceps from the forceps protruding port to perform biopsy.
I am going to take measures such as inspection. By the way, in general, the scope has a thin tip.
The observation window, the illumination window and the forceps (projection) port very close to each other.
They are provided in contact with each other. [Problems to be Solved by the Invention] The forceps opening is provided very close to the illumination window or the like.
Therefore, when the forceps are projected from the forceps mouth, the illumination light is reflected by the forceps.
Then, it will enter the observation window, and in the endoscopic image
The forceps image is very bright specifically. For this reason, especially
When photometry is performed, if the forceps are in that position,
Target to be treated with forceps because the outer part becomes dark
It is difficult to see the part (subject) side clearly.
There was a point. The present invention has been made in consideration of the above points.
A photometric device that allows the subject image to have appropriate brightness even when using a child
An object of the present invention is to provide an endoscope apparatus including the. [Means and Action for Solving Problems] In the present invention, in the endoscope having the forceps channel,
Depending on whether the forceps are projected from the outlet of the forceps channel,
Providing photometric means for non-photometrically measuring the forceps portion
By using the forceps, not only when the forceps are not used,
Even when used, proper dimming is possible. EXAMPLES Hereinafter, the present invention will be described specifically with reference to the drawings. 1 to 3 relate to a first embodiment of the present invention,
FIG. 1 is a block diagram showing the endoscope apparatus of the first embodiment, and FIG. 2 is
Front view showing the tip, Fig. 3 is an explanatory view showing the photometric range.
is there. As shown in FIG. 1, the endoscope apparatus 1 of the first embodiment is
Child endoscope (electronic scope) 2 and electronic scope 2
The connector 4 provided on the Versal cord 3 is attached to the light source.
Endoscope control device including device 5 and signal processing means
(Scope control device) 6 and video process circuit 7
Video signal is input and the monitor 8 displays in color
Become. The electronic scope 2 is thin so that it can be easily inserted into a body cavity.
It has a long insertion part 9 and a wide width operation at the rear end of this insertion part 9.
The part 11 is formed. A light guide for transmitting illumination light is provided in the insertion portion 9.
This light guide 12 is inserted and is inserted through the insertion portion 9.
12 is inserted in the universal cord 3 extending from the operation unit 11.
The connector 4 and attach the connector 4
The illumination light is supplied from the light source device 5 to the guide connector.
You. The light source device 5 uses the variable diaphragm 15 to illuminate the illumination light of the lamp 14.
Light guide controlled by condenser lens 16
Concentrate and irradiate the connector. Illumination light that is focused and irradiated
Is a light guide 12 formed of a flexible fiber bundle.
Therefore, the light is transmitted to the emission end face on the tip side of the light guide 12.
The illumination lens 18 attached to the illumination window 17 from the exit end face
Then, the illumination light is emitted in front of the illumination lens 18.
In addition, this light guide 12 is branched into two near the tip,
As shown in Fig. 2, a lens that closes the two lighting windows 17,17
The illuminating light is emitted forward through the holes 18, 18. Adjacent to the illumination window 17 is the tip portion 19 of the insertion portion 9
The observation window 20 is provided as an objective lens in this observation window 20.
21 is attached, and the focal plane of this objective lens 21 is CCD2
2 is arranged, and the objective lens is placed in the image area of this CCD22.
So that the subject image can be connected by the lens 21
is there. In the above-mentioned CCD22, the insertion part 9 and the universal cord 3
Scope via signal transmission cable 23 inserted in the scope
It is connected to the signal processing circuit 24 in the control unit 6, and CCD drive
Read from CCD22 by applying drive signal from bus 25.
The output signal is input to the sample hold circuit 26. Sampled and held by the sample and hold circuit 26
The converted signal is converted to a digital signal by the A / D converter 27.
Then, it is input to the memory 28 and temporarily stored. CC above
D22 is read at 60 fields per second and its output signal is
60 frames are written to Mori 28 every second. On the other hand, this memory 28
Is read twice as fast as writing, that is, 120 frames per second.
It is. This readout is for video output and for dimming.
Shito is performed alternately. Readout for video output is performed for all areas of memory 28.
However, the reading for dimming is specified by the discrimination circuit 29.
This is performed by electrically masking only the specified range. Reading for video output and dimming to the memory 28
Output is input to the D / A converters 31 and 32 for analog signal transmission.
Is converted to a number. The output of the D / A converter 31 is the video process circuit.
7 and the endoscopic image is displayed on the endoscopic screen 33 area of the monitor 8.
Are displayed in color. A forceps channel 34 is provided in the insertion portion 9,
Insertion port for the forceps channel 34 provided on the side of the operation unit 11.
Is closed with forceps plug 35. This forceps plug 35 is
By inserting a treatment tool such as biopsy forceps 36,
There is an opening that can be opened. This opening is normally closed
Is urged to become. (Note that no forceps plug is provided.
May be. ) This forceps channel 34 is shown in FIG.
Is provided adjacent to the illumination windows 17, 17 and the observation window 20
It communicates with a forceps projecting port (forceps port) 37. The forceps channel 34 merges with the suction channel 38,
This suction channel 38 uses the connector 4 as a scope control device.
By connecting to No. 6, sucking through the suction tube 39.
It is connected to the suction bin 41, and suction using this suction bin 41
It is driven by the pulling pump 42. The suction channel 38 includes the suction switching valve 43 and the suction switching valve 43 of the operation unit 11.
And a suction button 44 through a leak hole (not shown)
The suction pump 42 is in communication with the
Operating at a low level “LO” and removing from the leak hole
I'm sucking air. The upstream side of this suction channel 38
The end side) and the downstream side (pump side) are set by the suction switching valve 43 during normal times.
Has been cut off. Then push the suction button 44
Then, the leak hole is blocked and the upstream side of the suction channel 38
Communication with the forceps channel 34 of the
You. In this embodiment, near the insertion port of the forceps channel 34,
A changeover switch (for suction power) 45 is provided.
When the switch 45 is turned on, the control line connected to the suction pump 42
Operate suction pump 42 at high level "HI" via 46
I am able to do it. In this way, the switch 45 for controlling the suction force is provided.
Then, when you insert forceps, or suck something with a very high viscosity.
In some cases, the suction force can be easily controlled as needed. I
However, since it is provided near the forceps insertion port, it can be cut off when using forceps.
It is easy to operate the exchange switch 45. Of course, when using forceps
Setting the pulling pump 42 to high level "HI" is the suction channel.
Suction by using a surgical instrument such as biopsy forceps 36
This is to cover the decrease in attractive force. Where low level
"LO" is, for example, -20mmHg, and high level "HI" is, for example, -40mm.
It is mmHg. In addition, as shown in FIG.
Air supply water supply nozzle so that the protruding port faces the outer surface of the inspection window 20.
Le 47 is arranged. Then, the transmission provided in the operation unit 11
Operate the air / water switching valve 48 to supply air or water.
You can do it. By the way, when forceps are used in this first embodiment,
In both cases, when the subject is not bright enough
Dynamic range width of CCD22 by illuminating
Providing photometric means for color imaging that effectively uses
It is. If forceps are not used for the connector 4 of the electronic scope 2,
Mino metering range (first and second metering ranges 51, 52 in Fig. 3)
And the metering range when in use (see the first metering range 51 in Fig. 3
To change the light metering range when using forceps.
Discrimination resistance to determine (or determine the non-photometric range where light is not measured)
53 are provided. The resistance of the discrimination resistor 53 depends on its resistance value, so that it is suitable when using forceps.
Position and shape of the first metering range 51 (or non-metering range 52)
Shape, size, number and the first photometric range on the endoscopic screen 33
The area ratio of 51 is shown. These factors are due to some patterns
It is divided into groups. For example, the position is lower left 45
゜, lower left 22 °, lower, lower right 22 °, etc., and the shape is
The shape of the forceps as in the example
Some have the shape of an upper stand. Also, the size is
Inner diameter of channel 34 (for 2mm, 2.8mm, 3.7mm) and
And viewing angle. Of these combinations, the endoscope
That are not appropriate are excluded and the remaining ones are set
I have. The discriminating resistor 53 has a resistance value corresponding to them one to one.
The discriminating circuit 29 discriminates its contents. The discrimination circuit 29 discriminates the first photometric range 51.
Then, the image data area read from the memory 28 is determined.
The image data area outside this range is masked and output.
Input to the integration circuit 55 via the D / A converter 32.
You. In the case of FIG. 2, it corresponds to the part of reference numeral 51 in FIG.
The data area is read and integrated by the integration circuit 55.
After that, it is input to the amplifier circuit 56 and amplified. This increase
The width circuit 56 determines its amplification factor according to the discrimination signal of the discrimination circuit 29.
Can be controlled. In addition, this amplification factor is variable
Whether to control or not can be controlled by the switch 45.
is there. That is, when the switch 45 is on, the model of the scope 2
The amplification factor is constant regardless of
Be held. On the other hand, when the switch 45 is on, the discrimination circuit
Of the first photometric range 51 on the endoscopic screen 33 determined in 29.
The amplification rate is according to the area ratio. For example, the second photometric range
When the area of 52 is 20% of the area of the endoscope screen 33 (metering range 51
The area is 80% of the endoscopic screen) and the amplification rate is 1.25 times. This
Change the area of the photometric range by changing the amplification factor as shown in
It prevents the brightness from changing. The output of the amplifier circuit 56 is input to the diaphragm drive circuit 57.
When the output of this amplifier circuit 56 is larger than a certain value,
Optimum illumination light by reducing the diaphragm 15 to reduce the amount of transmitted light
To quantity. If it is smaller than a certain value, open the diaphragm 15.
The amount of illumination light is increased to maintain an appropriate amount of illumination light. In the first embodiment, the tip portion 19 of the scope 2 is
The forceps port 37 provided for the observation window 20
Accordingly, a determination means for determining the placement information is provided,
A biopsy is performed from the forceps port 37 by making a discrimination by the discrimination circuit 29.
If the forceps 36 etc. protrude and enter the observation field of view,
The range where forceps 36 enters the field of view is the non-photometric range and the remaining range
The feature is that it is used for photometry.
That is, when the switch 45 is off, the endoscope screen of FIG.
33 The average photometry is performed for the entire 33, that is, both ranges 51 and 52.
On the other hand, when the switch 45 is on, only the part of the metering range 51
Average photometry is performed and reference numeral 52 is ignored for dimming. This
Here, the second photometric range 52 is located at the forceps port 37 when viewed from the observation window 20.
The forceps 36 project from the forceps port 37 and
The light reflected by the forceps 36 is strongly incident on the inside.
However, that part is not used for dimming, so other parts are dark.
It can be solved. In this embodiment, the second photometric range 52 is the endoscopic image.
It is provided in the direction of the lower left 45 ° on the surface 33. According to the first embodiment thus configured, the forceps port 37
Dimming that part according to the position where
There is a means to prevent photometry
When using a treatment tool such as the biopsy forceps 36,
When projecting from 37 with forceps 36, simply turn on switch 45.
If you do, the parts other than the forceps will not become dark.
Within the CCD22 imaging level range (dynamic range)
Thus, it is possible to always carry out color imaging with proper brightness.
If the forceps 36 are not used, simply switch off the switch 45.
If this is done, dimming can be performed as usual.
You. In addition, the suction force selector switch and the metering range selector switch
Switch 45 that doubles as a switch is used, so use forceps
You can respond to the time with a single touch. FIG. 4 shows the photometric range in the second embodiment of the present invention.
You. In the second embodiment, the tip portion corresponds to the mirror image of FIG.
2 and the thinner forceps chuck than in the case of FIG.
It's a channel. Therefore, in this second embodiment, from the lower right side, the forceps channel
Are observed to project, and the lower right (force
The second metering area 52 is formed
It is. Also, forceps that are thinner than in the first embodiment may be projected.
Therefore, the second photometric range 52 is smaller than that in the first embodiment.
It's narrowed. FIG. 5 shows the photometric range in the third embodiment of the present invention.
You. In this third embodiment, forceps channels are provided on both left and right sides of the observation window.
This corresponds to the case where two cables are provided, so
A second photometric range 52 is formed in both lateral directions. FIG. 6 shows the photometric range in the fourth embodiment of the present invention.
You. This 4th Example is a case of a side-view type scope.
Part of the forceps raising base on the right side adjacent to the observation window for vision
The second metering range
It can be set to 52. FIG. 7 shows the main part of the fifth embodiment of the present invention. In the fifth embodiment, whether forceps are inserted (force
Of the CCD22) whether the probe is protruding from the forceps port 37).
Even if it detects it by force and automatically switches the photometric range
It is. The output of the CCD22 is input to the sample hold circuit 26.
After being sampled and held, the A / D converter shown in Fig. 1 is
Input to the video process circuit 7 via the data 28 or directly
Is done. The output of this sample hold circuit 26 is
Input to the path 61 and read from the memory 63 by the reading circuit 62.
The force level to determine if the forceps are protruding.
Then, the determination signal is sent to the calculation circuit 64. The memory 63 has a discrimination resistor in the connector 4 shown in FIG.
It is provided in place of 53 and has forceps depending on each model of scope.
The remaining first photometric range of the projected portion (reference numeral in FIG. 8)
The following information is written so that the
ing. That is, the memory 63 is assigned to the scope according to the scope.
2nd, 3rd, 4th, 5th metering ranges 67, 68, 69, 7 that are uniquely provided
0 position and shape and the first, fourth, and third on the endoscopic screen 33.
5 The reciprocal of the sum of the photometric ranges 66, 69, 70 is stored.
ing. Here, the area of the 3rd, 4th, and 5th photometric ranges 68, 69, 70
Is constant regardless of the scope model. Also these first
The areas of the third, fourth and fifth photometric ranges 68, 69 and 70 are equal to each other.
The read circuit 62 reads the contents of the memory 63, and reads the contents of the third, fourth, and fifth
Judgment circuit 61 for position and shape data of photometric ranges 68, 69, 70
And the position and shape of the second and third photometric ranges 67 and 68
To the calculation circuit 64. The determination circuit 61 is used for the third, fourth, and fifth photometry.
Multiply the CCD output (luminance component) of each part in the range 68, 69, 70
Minute. In this case, the time series signal from the CCD 22 and the readout circuit 62
The signals from the 3rd, 4th, and 5th photometric ranges are synchronized.
Integrate only during the time part corresponding to 8,69,70. However
The integrated value of the third photometric range 68 is a constant value (for example, white
(About 100% of the level) and the product of the fourth metering range 69
Minute value is below a certain value (for example, around 70% of white level)
And the integral value of the fifth photometric range 70 is a constant value (for example,
When the force is below 70% of the white level)
It is determined that there is. By the way, the tip of the forceps 36 projects from the forceps port 37.
First, it appears in the third photometric range 68 in the field of view, and then
Then, pass through the second photometric range 67 to the center of the endoscope screen 33.
Head over. Even if you do not insert the forceps 36,
If the lower right side is extremely close to the body wall, the 3rd, 4th and 5th photometric ranges
Areas 68, 69 and 70 are all above 70% of the white level.
It may get dull. When the right side is bright, 3rd and 4th measurements
The light range 68, 69 is 70% or more, and the fifth light measuring range 70 is 70%
There are the following cases, but even if only the lower right is bright, the third measurement
Only the light range 68 is 100% or more, and the 4th and 5th metering ranges 69 and 70 are
The probability of occurrence of 70% or less is so small that it can be ignored
No. Therefore, in this way, the force of the edge around the endoscopic screen 33 is
A third photometric range 68 with a small area is provided in the direction of the sub-mouth 37, and
The 4th and 5th photometric ranges 69 and 70 of small areas are provided on both sides, and the 3rd
The photometric range 68 has a brightness of a certain value or more, and the fourth and fifth
When the photometric range 69, 70 is below a certain value, the forceps
According to the determination method that the forceps 36 are protruding,
It is possible to reliably determine nothing. The judgment circuit 61 sends the judgment result to the calculation circuit 64, and
The calculation circuit 64 of the
Select the light range. In addition, the sizes of the third, fourth, and fifth photometric ranges 68, 69, and 70 are equal.
Therefore, the circuit configuration of the determination circuit 61 can be simplified. The calculation circuit 64 outputs the output of the read circuit 62 and the determination circuit 61.
The brightness is calculated accordingly. The judgment of the judgment circuit 61 is “(force
Child) non-insertion ”, the output of the read circuit 62 depends on
Without integrating the first to fifth photometric ranges 66 to 70
On the entire surface), and the judgment of the judgment circuit 61 is “(forceps) insertion.
ON ”, the first, fourth and fifth photometric ranges 66, 69, 70
Are integrated, and in the endoscopic screen 33, the 1st, 4th,
5 Multiply by the reciprocal of the proportion occupied by the photometric range 66,69,70. The diaphragm drive circuit 57, according to the output of the calculation circuit 64,
The diaphragm is controlled as in the first embodiment. The CCD 22 shown in FIG. 7 is composed of, for example, 400 pixels vertically and horizontally.
16 million pixels, 1/60 seconds from the sample and hold circuit 26
Each time, 160,000 image data are output in time series. this
On the other hand, the memory 63 also stores information corresponding to one pixel of the CCD22.
It may be a memory capacity that has information, but
Then, you will need this large capacity,
Is used to store 400 pieces of data with 20 vertical and 20 horizontal.
Can be. In this case, one data in the memory 63 is
It is equivalent to 400 pixels. And then each of these 400 pieces
Data on which of the first to fifth photometric ranges 66 to 70 it belongs to
Has been written. The read speed of the memory 63 is the same as that of the CCD22.
On the other hand, it is 1/20, and each row is read 20 times. However
The determination circuit 61 and the calculation circuit 64 are arranged in the third, fourth and fifth photometry ranges.
68,69,70, 1st, 4th, 5th photometric range 66,69,70
Since the read is ANDed to perform integration, photometry (product
Min) will be done for 8000 pixels. In this case, the switch 45 in FIG. 1 is for switching the suction force.
It has only the function. FIG. 9 shows a sixth embodiment of the present invention. In the endoscope device 81 of the sixth embodiment, the fiberscope is
The camera for photography is attached to this fiberscope 82 using 82.
It is equipped with 83 so that you can take pictures. The fiberscope 82 is shown in FIG.
Instead, a fiber bundle image guide 84 is used.
With this image guide 84, the light is emitted from the eyepiece 85 side.
Transmit an optical image to the end face. The lens facing this exit end face
The first half prism 87 is arranged through the
The transmitted light and the reflected light are separated by the EF prism 87
The eyepiece 88 is placed from the rear of this eyepiece 88
Can be observed with the naked eye. The second half prism 87 has a second beam on the reflected light side.
The second half prism is provided with a half prism 89.
On the reflected light side of 89, a first light receiving mask 91 is used to
An optical element 92 is provided. This second half prism 89
The second light receiving side through the second photometric mask 93
The element 94 is provided. The first and second photometric masks 91 and 93 are shown in FIGS.
The shape is as shown in FIG. In other words, the first photometric mask 91
The circular opening 95a is formed in the light receiving area of the first light receiving element 92.
The light-shielding mask 95
b. On the other hand, the second photometric mask 93 has the circular opening.
From the lower part of the mouth 95a toward the center of the opening 95a, place the light shield 96.
It is smaller than the circular opening 95a in the provided light-shielding mask portion 97b.
It has a large opening 97a. Output signals of the first light receiving element 92 and the second light receiving element 94
No. is driven by the diaphragm provided in the light source device 99 via the selector 98.
Input to the circuit 100. Inserting forceps provided on the operation unit 101 of the fiberscope 82.
The inside of the entrance is provided with a means for detecting the insertion of the forceps 36.
The toe interrupter 102 is provided, and the forceps 36 are
It is possible to detect whether it has been inserted into the channel 34.
The output of the light receiving element in this photo interrupter 102
Force controls the switching of selector 98
It is applied to the switching control end, and the output is "H" or
Switch the side to turn on with "L". The forceps opening 103 of the fiberscope 82 is used as the observation window 20.
It is formed on the lower side of. The illumination optical system and the light source device of the fiberscope 82 are
In the table 99, the same members as those in the first embodiment are designated by the same reference numerals.
It is. A turtle attached to the eyepiece 85 of the fiberscope 82.
La 83 has an imaging lens 104 arranged facing the eyepiece lens 88.
The image is formed on the film 105. The photo interrupter 102 is in the operation unit 101, and
This photointerrupter is provided near the forceps plug 35.
The forceps channel portion in the portion where the
Transparent material such as clear acrylic pipe or transparent rubber tube
It is formed using. Then, this photo interlace
The light receiving element (eg, phototransistor) of
Turns on when the forceps 36 are not inserted, and
Turns off. This output causes the selector 98 to
The outputs from the second light receiving elements 92 and 94 are switched. That is, when the forceps are not inserted, the output of the first light receiving element 92 is reduced.
Is sent to the aperture drive circuit 100, and in response to this, the aperture drive circuit 100
Controls the diaphragm 15. On the other hand, when inserting the forceps, the second light receiving
The diaphragm 15 is controlled according to the output of the element 94. The first half prism 87 has a spectral ratio of 9: 1, for example.
Is the rate and transmits 90% of the light transmitted by the image guide 84.
Then, the light is guided to the film 105 side. The remaining 10% is second
Toward half prism 89 of which, for example, 47.4% is
1 is reflected by the light receiving element 92 side, and the remaining 52.6% is the second light received.
Face the element 94 side. (In this case, 47.4%, 52.6% above
As for the value of, the area of the light shielding part 96 shown in FIG.
Set as 10% of the area of the circular opening (that is, the light receiving area) 95 of
The light transmitted through the mask 91 shown in FIG.
If you set the ratio of light transmitted through the mask 93 of 10 to 9/19
× 100 = 47.4 (%), 10/19 × 100 = 52.6%. this
The percentage ratio is the ratio to the aperture 95 (that is, the light receiving area).
It depends on the ratio of the light section 96 (that is, the non-light-receiving area). In addition, attach to the light receiving areas of the first and second light receiving elements 92 and 94.
In both photometric masks 91 and 93,
The opening 95a is equal to the shooting range on the film 105, and the second measurement
When the forceps 36 are projected on the optical mask 93, the protruding forceps part
A small aperture for the light-shielding part 96 that is provided so that the minutes are not metered
It is 97a. Therefore, the opening 9 of the first photometric mask 91
5a and the opening 97a of the second photometric mask 93 have the same diameter and are shielded.
The area of the light portion 97b is equal to the area of the opening 95a of the first photometric mask 91.
For example, 10%. Then, the first light receiving element 92
The forceps 36 were inserted between the output and the output of the second light receiving element 94.
Even if it is not done, it will be roughly the same for the same subject.
It becomes difficult. FIG. 12 shows the main part of the seventh embodiment of the present invention. In the seventh embodiment, the switch 121 is used to control the dimming signal.
To cut the high level area in the signal to perform dimming
It was made. The output of the sample hold circuit 26 is high level cut
This high-level cut fill entered into filter 122
The signal passed through the converter 122 is input to the average photometry circuit 123,
The output of the average photometry circuit 123 is input to the diaphragm drive circuit 118.
You. The high-level cut filter 122 is provided on the switch 121.
Therefore, the output characteristics can be changed as shown in Fig. 13.
Wear. For example, when the switch 121 is off, the first cut
Bell V1 cuts on the high level side. This first
The cut level V1 is set higher than the white level. This
This is to make it difficult for the near point to be exceeded.
You. The second cut level V2 is the first cut level V1
It is set to a lower value, and this level V2 is a white level.
It is set at a much lower level. This will make the screen
It will be brighter than when switch 121 is off, and forceps 36 will
Correct the body wall by canceling out the factors that make it dark
Make it bright. Set the second cut level V2 above the white level
The reason is that this setting occupies a large proportion of forceps on the screen.
At the time of hearing (for example, forceps slightly protruded from the forceps port 37)
The body wall looks bright when opened). Also for biopsy
Therefore, even when bleeding occurs and the body wall itself becomes dark,
You will never lose its brightness. By the way, the CCD22 is in a state where there is no light.
However, due to the dark current or the like, a signal having a slight value is output. This
If this is taken as the noise level, the video process circuit 7
The black level of the video signal defined by
And as shown in Fig. 13, if it is slightly higher than the noise level,
It is set around the time. On the other hand, the white background defined by the video process circuit 7
The bell is well below the saturation level of the CCD itself.
Generally, it is set to the 13th in this embodiment.
As shown in the figure, the first cut level V1 and
And a second cut level V2 for forceps insertion
Signal to produce the appropriate brightness.
You. In addition, the first and second cut levels V1 and V2 are set appropriately.
Must be set, but is linked to the on / off of switch 121
And switch the gain for the video signal.
Is also good. By the way, for example, solids such as CCD22 shown in Fig. 1 and others
A solid-state image pickup device 13 shown in FIGS. 14 and 15 as an image pickup device.
1 can be used. In the endoscope, the insertion part of the endoscope in the CCD and its peripheral circuits.
It is necessary to minimize the area in the cross section perpendicular to the axial direction of
It is necessary. Therefore, in this solid-state imaging device 130, the CCD
By fixing the top 131 to the substrate 132 at a right angle,
A switch for electrical connection between the CCD chip 131 and the peripheral circuit 133.
The pace is decreasing. At that time, wire bonding to the side surface of the substrate 132
Need to do ceramic or glass epoxy
However, since the surface of the side surface of the substrate 132 is extremely rough,
Wire bonding cannot be done as it is, but in this embodiment
Is enabled as follows. The substrate 132 is a multi-layer ceramic substrate.
Lead metallization 134 and die attach on surface 132A
A metallizing unit 135 for mounting and a metallizing unit 136 for mounting components are provided.
Have been. Also, the back surface 132B of the substrate 132 is shown in the figure.
Without through hole and through hole land
Then, the side surface 132C is polished to a smooth surface, and the back surface
132B through hole land and side 132C
Metalize the surface. After that, back surface 132B and side surface 132C
Laser trimming is performed on the back surface 132B.
Talize pattern 137, as shown in Fig. 15, side surface 132C
Trimming grooves 138, ..., 138 are provided in the
Mold the padding 139, ..., 139. Metallization of the surface 132A of the substrate 132 for die attachment
A die attach 141 is brazed to the part 135 to provide a lead meta.
The external lead 142 is brazed to the rise portion 134. However
After plating, the die attach 141 has a CCD chip 131
Die-bonding the chip side bonding pad 14
3 and the bonding pad 139 on the substrate side
YA 144 to connect. Image area of this CCD chip 131
Adhere a cover glass 145 to the side surface and seal with a sealing member 146.
Stop. A peripheral circuit is formed in the component mounting metallization unit 136.
Attach peripheral parts 133 by brazing or soldering
You. According to this embodiment, laser trimming allows
Trimming the entire metallized area on the side surface of the plate 132
Grooves 138, ..., 138 are provided to form substrate side bonding pads 139,
…, 139, so this bonding pad 13
9,…, 139 is about 0.2mm which is the limit of wire bonding
Can be formed at small intervals. Therefore, thick or thin film
Depending on the technology, such a minute pattern that cannot be formed
Therefore, the small solid-state imaging device 130 can be realized. Figures 16 and 17 differ from those shown in Figures 14 and 15.
The main part of the package 151 for solid-state imaging devices is shown. In this embodiment, the lead frame 152 is three-dimensionally folded.
Bending it, insert the mold part 153 in that state.
To mold. After polishing the substrate side bonding pad 139,
The metal part is plated, and the die attach part 152A has a CCD chip 1
Die-bond 31 and bond as described above.
Assemble ear 144, cover glass 145, and sealing resin 146 in this order
You. In this case, the mold part 153 is made to have a relatively high glass transition point.
Resin with a high
However, the mold part 153 does not deform when molding the sealing resin.
I'm trying. Then, after assembling as shown in FIG.
A package with the CCD chip 131 mounted by cutting at the position
Has realized. Note that the GND terminal 152B is
The outer lead portion 152C is formed by the cross section of A.
You. Note that FIG. 18 shows the lead frame seen from the right side of FIG.
The outline of 152 is shown. According to this embodiment, each lead in the external lead portion 152C is
Since the distance between the adjacent ends of the cord can be increased,
Short-circuit connections with peripheral circuit parts and signal lines
Can be easily done without. By the way, in the upper gastrointestinal tract examination, usually, the left decubitus position
You. In this case, the scope control device 6 shown in FIG.
It depends on the hospital whether or not it is placed here, but Figs. 19 and 20
For patient 160 facing left in bed 159 as shown in
On the right side of the person or in between. In Fig. 19 and Fig. 20, the scope control device 6 is oriented 90 °.
Since the directions are different, the operating section 11 and connector 4 are fixed
If the uni
-Salcor 3 twists 90 degrees. Conventionally, as shown in Fig. 21, the insertion section 9 is set vertically and
When the Versal cord 3 is straightly extended horizontally,
The UP direction when the connector 4 is attached to the control device 6 is the 21st
It was in the right direction when viewed from the right side in the figure. Therefore, the 20th
Although the universal cord 3 is not twisted in the state shown in the figure,
In the state shown in Fig. 19, the universal cord 3 is twisted 90 °.
It was hard to use. Therefore, as shown in Fig. 22, the light
The straight line connecting the id base 161 and the electrical contact 162 (connector
Set to 4 UP direction. ) To be set around 45 ° in the lower right
Therefore, the control device can be located at any position in FIG. 19 or FIG.
Even if 6 is placed, the universal cord 3 is inspected for twisting.
It can be done without disturbing For the upper digestive tract
It is especially effective in endoscopes and endoscopes for duodenum.
In addition, in FIG.
Three are provided. In addition, as shown in FIG. 23, a grip portion 164 provided with a protrusion or the like is provided.
By providing the connector 165 with
It can be easily attached and detached. In addition, the electrical contacts 162 are generally
The amount of attachment / detachment is greater than that of the light guide base 161.
Separate the guide base 161 and electrical contact 162 (separate)
Hold the connector 165 behind the electrical contact 162.
Since the portion 164 is provided, it is easier to attach and detach. By the way, lower gastrointestinal tract differences are usually performed in the left lateral decubitus position.
U. In this case, the bed is, for example, the electric bed 171,
There is an X-ray fluoroscope 172 on the other side of the electric bed 171.
The position of the controller 6 is as shown in FIG. 20 or FIG.
In other words, it may be used 180 degrees backwards. Therefore, the lower gastrointestinal endoscopy shows that
ー When the monkey cord 3 is extended, the UP direction when mounting is 25th
As shown in the figure, the vertical position is shown in Fig. 20.
However, also in Fig. 24, the twists are 90 ° each, and one is markedly
It doesn't get difficult. It should be noted that the monitor 8 is placed on the scope control device 6 for use.
In such a case, the monitor 8 should be the layout shown in Fig. 24.
Easy to see. Of course, the direction of the connector 4 with respect to the operation unit 11 can be changed.
It may be. Universal cord 3 is easy to twist
You may make it. Incidentally, as shown in FIG. 26, in the middle of the universal cord 3.
180 degrees at the connection between the universal cord 3 and the connector
A rotating unit 181 that can be rotated is provided so that the light source is on the right or left.
Scope 18 that can be connected without twisting
It may be 2. In addition, the light guide case can be
It is branched into the bull 183 side and the signal cable 184 side. or,
As shown in Fig. 27, connect the connector 185 to the UP direction in the 180 ° range.
The rotating mechanism 186 that can be changed by the
Therefore, the lock may be performed at an arbitrary angle. [Effects of the Invention] As described above, according to the present invention, the forceps are the forceps projecting ports.
Corresponding to the case where the forceps is protruded from the
Forming means for photometry using parts other than minutes
So, not only when not using forceps but also when using forceps
The brightness can be set appropriately.

BRIEF DESCRIPTION OF THE DRAWINGS FIGS. 1 to 3 relate to a first embodiment of the present invention.
FIG. 1 is a configuration diagram of the first embodiment, FIG. 2 is a front view showing a tip portion of an electronic endoscope, FIG. 3 is an explanatory view showing a photometry range, and FIG. 4 is a photometry in a second embodiment of the present invention. Explanatory diagram showing the range,
FIG. 5 is an explanatory diagram showing a photometric range in the third embodiment of the present invention, FIG. 6 is an explanatory diagram showing a photometric range in the fourth embodiment of the present invention, and FIG. 7 is a fifth embodiment of the present invention. FIG. 8 is a configuration diagram showing a main part, FIG. 8 is an explanatory diagram showing a photometric range in a fifth embodiment, FIG. 9 is a configuration diagram of a sixth embodiment of the present invention, and FIG. 10 is a first photometry in the sixth embodiment. Front view showing the mask, No.
FIG. 11 is a front view showing the second photometric mask in the sixth embodiment, FIG. 12 is a block diagram showing the main parts of the seventh embodiment of the present invention, and FIG. 13 is a high-level cut filter in the seventh embodiment. FIG. 14 is a side view showing a solid-state image pickup device applicable to the first embodiment and the like, FIG. 15 is a front view seen from above in FIG. 14, and FIG. A schematic side view of the solid-state imaging device package applicable to the embodiments and the like without cutting the lead frame, FIG. 17 is a rear view of FIG. 16, and FIG. 18 is a lead frame seen from the upper surface side of FIG. FIG. 19 is a schematic plan view showing the same, FIG. 19 is an explanatory view showing one example of the arrangement of the endoscope device at the time of use, FIG. 20 is an explanatory view showing an arrangement example different from FIG. 19, FIG. 21 and FIG. Are explanatory views showing the angular directions when the connector is attached in the present invention, and FIG. 23 is a connector provided with a grip portion. Side view, showing
FIG. 24 is an explanatory view showing an arrangement example of the endoscope device, and FIG. 25 is an explanatory view showing an angular direction when the connector is attached in the present invention,
FIG. 26 is a schematic side view showing an electronic endoscope provided with a rotating portion,
FIG. 27 is a side view showing a connector provided with a rotating portion. 1 ... Endoscope device 2 ... Electronic endoscope (electronic scope) 3 ... Universal cord 4 ... Connector, 5 ... Light source device 6 ... Scope control device, 8 ... Monitor 15 ... Aperture, 17 ...... Illumination window 20 ...... Observation window 22 ...... CCD 29 ...... Discrimination circuit 34 ...... Forceps channel 36 ...... Biopsy forceps 37 ...... Forceps port 51 ...... First photometric range 52 ...... Second Metering range 57: Aperture drive circuit

Claims (1)

(57) [Claims] An endoscope having an observation window, an illumination window, and a treatment tool projecting port at its tip, and photometry except for a range of the treatment tool projecting from the treatment tool projecting port within the observation field of view within the observation field of view. 1
And a second photometric means for performing photometry including a range in which the treatment tool projecting from the treatment tool projecting opening in the observation field of view is included in the observation field of view. Based on the switching means for switching the first photometric means to the second photometric means when the treatment tool is not inserted, and the photometric means selected by the switching means,
An endoscope apparatus comprising: a control unit that controls the brightness of an image on the endoscope. 2. A light source that supplies illumination light to the subject, a solid-state image sensor that receives light reflected from the subject, and a high-level cut unit that cuts a high-level area in a signal for dimming output from the solid-state image sensor, Means for switching the level of the high level cut means, average photometric means for inputting the output signal of the high level cut means, and dimming means for dimming the light supplied from the light source to the subject based on the average photometric means And an endoscope device, wherein: