JPS63274909A - Common power unit for endoscope - Google Patents

Abstract

PURPOSE:To reduce the size of the title unit by forming >=2 devices among a surface sequential light source unit and simultaneous and surface sequential image pickup controllers as independent units so that a power source part is shared. CONSTITUTION:A lamp power source 31A in a common power unit 31 supplies electric power to white light source units 13 and 14 of the simultaneous and surface sequential image pickup devices through dimming circuits 18 and 25 and a power source 31B for others supplies electric power to the dimming circuits 18 and 25, controllers 26 and 27, and others. Then light projected by a light source lamp 19 passes through a primary color rotary filter 22 and then a condenser lens 23, a light guide 6, and an orienting lens 7 to irradiate an object. Its reflected light forms its image on a solid-state image pickup element 9 through an objective lens 8. Its output signal is inputted to a control circuit 27 through a preamplifier 11 and a signal line 12 to display an image on a monitor 29. Light from a lamp 15, on the other hand, radiates the object through a condenser lens 16, the light guide 6, and the lens 7. Its reflected light passes through a lens 8 and a color mosaic optical filter 10 to form its image on the element 9, thereby obtaining an image signal.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to each light source device for a field sequential type and simultaneous type electronic scope, an imaging control device, or a light source device for a fiber scope. This invention relates to a common power supply device for endoscopes that can supply electric power.

[Problems to be solved by conventional techniques and inventions] In recent years,
An endoscope (endoscope) that allows you to observe internal organs, etc. in a body cavity by inserting a long and thin insertion part into the body cavity, and perform various therapeutic procedures as necessary using a treatment instrument inserted into the treatment instrument channel.
Also called scope or fiber scope. ) is widely used.

Furthermore, various electronic scopes using solid-state imaging devices such as charge-coupled devices (CODs) as imaging means have been proposed. This electronic scope has advantages such as higher resolution than a fiber scope, easier recording and reproduction of images, and easier image processing such as enlarging images and comparing two images.

The color image transport method of the electronic scope involves sequentially switching the illumination light to R (red), G (green), B (blue), etc., as shown in, for example, Japanese Patent Laid-Open No. 61-82731. For example, as shown in Japanese Unexamined Patent Publication No. 60-76888, color filters that transmit color lights such as R, G, and B are arranged in a mosaic pattern in front of a solid-state R pixel element. There is a simultaneous type (also called a color mosaic type) that includes a filter array. Compared to the simultaneous method, the field-sequential method has the advantage of better resolution and the ability to reduce the number of pixels and make the scope thinner. Also, it is suitable for image processing because data for each color can be directly processed. ing. On the other hand, the simultaneous type has the advantage that it allows short exposure, does not cause color shift, is suitable for areas that move quickly such as the esophagus, and does not cause smearing due to the laser guide light.

Further, the electronic scopes are diversified depending on the purpose of use. For example, for upper or lower gastrointestinal use,
The outer diameter of the insertion portion is approximately 10φa.

On the other hand, for bronchial applications, for example, an outer diameter of around 5φ or less is usually required. In this way, the outer diameter of the insertion portion is wide! For various electronic scopes ranging from
It is physically and physically unreasonable to use the same type of carrier probe and the same type of Ha fil system. That is, for example, in order to realize a bronchial (small diameter) electronic scope, it is necessary to use an image carrier with a small number of pixels.

In cases where the number of pixels is small, in order to prevent a decrease in resolution, it is better to illuminate the image sequentially with light of each wavelength, such as R, G, and B, rather than using a simultaneous imaging method using a color mosaic filter. A frame-sequential color imaging method is advantageous, in which images are captured sequentially under the illumination, and these images are combined and displayed in color.

On the other hand, for shoes with an outer diameter of around 10φ, it is advantageous to increase the number of pixels and use the simultaneous t, . . . is method for improving image quality.

As described above, both the field-sequential type and the simultaneous type electronic scope have their advantages and disadvantages, and it is best to use them properly depending on the purpose and place of use.

Incidentally, the fiber scope or the electronic scope is generally used by being connected to a light source device that supplies illumination light suitable for each scope.

The illumination methods are different for the fiber scope, the field-sequential electronic scope, and the simultaneous electronic scope. That is,
A fiber scope and a simultaneous type electronic scope require white light, and a field sequential type electronic scope requires light that is sequentially switched to R, G, B, etc.

In addition, the field-sequential electronic scope and the field-sequential TV camera connected to the fiber scope are connected to their own image capture control device, and the simultaneous electronic scope and the simultaneous field-sequential television camera connected to the fiber scope are The television camera is connected to its fam ill m device.

Conventionally, the light source device for white light, R2G, B
Light source device that switches sequentially, simultaneous imaging! II tl
Each of the D device and the frame-sequential imaging control device has its own built-in power supply device a, which performs necessary voltage conversion, rectification, and isolation, and supplies power.

By the way, as mentioned above, it is desirable to use the field-sequential type and simultaneous type electronic scope or fiber scope depending on the purpose and place of use, so each light source device and each imaging control device are often installed together. considered,
In that case, if each of the multi-light source device and each imaging control device has its own built-in power supply device, not only will each device unit become larger, but it will also be economically wasteful. Particularly in light source devices, lamps of 300 W or more are usually used, so the power source for driving the lamps is quite large.

The present invention has been made in view of these circumstances, and includes a white light source device that supplies white light, and R and G lights.

When installing at least two of the following: a field-sequential light source device that supplies sequentially switched light such as B, a simultaneous-type imaging control device, and a field-sequential-type imaging control device, the power supply device can be shared among the devices. It is an object of the present invention to provide a common power supply device for endoscopes which is miniaturized by eliminating the power supply part from the present invention.

[Means for Solving the Problems and Their Effects 1 The common power supply device for endoscopes according to the present invention includes a light source device that supplies white light, and a light source device that supplies light that sequentially switches between R, G, B, etc. , a power supply device that supplies the necessary power to at least two of the simultaneous imaging control device and the frame sequential imaging control device is provided, and the power supply device is connected to the power supply device to supply the necessary power. The power supply device is omitted from the above-mentioned device.

[Example] Hereinafter, the present invention will be described in detail with reference to the drawings.

1 to 3 relate to one embodiment of the present invention, in which FIG. 1 is a block diagram illustrating the overall configuration of the endoscope 1, and FIG.
The figure is a block diagram showing an example of a simultaneous imaging control device.
The figure is a block diagram showing an example of a field sequential image transport control device.

In FIG. 1, reference numeral 1A indicates a simultaneous electronic scope, and reference numeral 1B indicates a sequential electronic scope, each of which includes an elongated insertion section 2 that is inserted into a body cavity, and an operation unit connected to the rear end of this insertion section 2. A universal cord 4 is extended from this operation 8II3, and light source connectors 4A and 4B are provided at the branched ends of the universal cord 4, and the other branched end of the universal cord 4 is provided with light source connectors 4A and 4B. Signal connectors 5A and 5B are provided at the ends. Each scope IA, 1B has a light guide 6 that transmits illumination light.
are inserted through the light guides 6, and the illumination light is irradiated to the subject in front of the light guides 6 through a light distribution lens 7, which is disposed in front of the output ends of the light guides 6 as required. Further, each of the scopes 1A and IB has an objective lens 8 for imaging disposed at the distal end of the insertion section 2, while a solid-state imaging device 9 such as a COD is located at the imaging position behind the objective lens 8. In the simultaneous scope 1A, a color mosaic optical filter 10 is provided in front of the solid-state image carrier 9.

The solid-state imaging device 9 constituting the imaging means photoelectrically converts the optical image formed on the imaging surface, amplifies it in the preamplifier 11, and then transmits it to the signal connectors 5A and 5B via the signal line 12. There is.

By the way, the white light source device 13 that supplies illumination light to the light guide 6 of the simultaneous electronic scope 1A and the field sequential light source device 14 that supplies illumination light to the light guide 6 of the field sequential electronic scope 1B are each independent. organized into units.

The white light source device 13 includes a white light source lamp 15 that emits white light, and the white light emitted from the white light source lamp 14 is condensed by a condensing lens 16, and is attached to a connector receiver 17 provided on the front surface. White illumination light is supplied to the incident end face of the light guide 6. Therefore, a fiberscope can be connected to this light source device N13. This white light source device 13 has a built-in light control circuit 18, and for example, a part of a carrier signal inputted via a simultaneous imaging control device (described later) is compared with a brightness reference signal, and the aperture is driven by this comparison output. The light is automatically adjusted by

On the other hand, the field sequential light source device 14 includes a light source lamp 19 that emits white light, for example, red (R) and green (G).

The motor 21 has a color transmission filter for three primary colors of blue (B).
The rotary filter 22 is rotationally driven by the rotary filter 22. The white light emitted from the light source lamp 19 passes through a rotary filter 22 and is sequentially turned into illumination light of each wavelength, for example, R, G, and B, and then is condensed by a condensing lens 23, which is mounted on the front surface. Illumination light is supplied to the incident end of the light guide 6 mounted on the connector receiver 24. This field-sequential light source device 14 has a built-in light control circuit 25, and a part of the image carrier signal inputted through, for example, a field-sequential image carrier control device described later, is compared with a brightness reference signal.
The light is automatically adjusted by driving the aperture based on this comparison output.

Further, the signal connector 5A of the simultaneous electronic scope 1A is connected to the connector receiver 26A to form a video signal, and the signal connector 5B of the sequential electronic scope 1B is connected to the connector receiver 27A. The frame-sequential image transport υ control device 27 for forming a video signal is constructed as a separate unit. In this embodiment, the simultaneous image carrier 111tLD device 26 and the frame-sequential imaging control device N27 are connected to an observation monitor 29 via a superimposer 28 configured as a single unit. Further, a keyboard 30 is connected to the superimposer 28, and patient data etc. inputted with the keyboard 30 are displayed in an image on a monitor 29 by superimposing by a superimposing circuit and a mixer in the superimposer 28. It is designed to let you do so.

By the way, in this embodiment, the white light source device 1
3. Simultaneous image transport control device 26, field sequential beam device 14, field sequential image transport control device 27, superimposer 28, keyboard 30. Each of the observation monitors 29 does not have its own power supply unit for voltage conversion, rectification, isolation, or power supply, and is therefore compactly constructed.

The power supply section for each device is provided in a common power supply device 31 that is independently configured as a single unit, and voltage conversion, rectification, etc. for each device is performed within this common power supply device 31, and the power cord The necessary power is supplied to each device via the The common power supply device 31 is provided with a lamp power supply section 31A for lighting, which requires relatively large power, and a power supply section 31B for other purposes.

The circuit configuration of the simultaneous imaging control device 26 is shown in FIG. 2, for example. That is, the electric signal output from the simultaneous electronic scope in FIG. 2 is input to the luminance signal processing circuit 32 and the color signal reproducing circuit 33. As a result, the luminance signal @Y is generated from the luminance signal processing circuit 32, and the color difference signals R-Y and B-Y are generated time-seriesly for each horizontal line from the color signal reproducing circuit 33. , the white balance is compensated by the white balance circuit 34, one is directly input to the analog switch 35, the other is delayed by one horizontal line by the 1H delay line 36 and input to the analog switch 35a, and the color difference signal is input by a switching signal of a timing generator (not shown). RY and BY are generated. The r4 degree signal Y and the color difference signals R-Y and B-Y are multiplexed by the NTSG encoder 37 and input to the observation monitor 29, so that the observed region is displayed in color.

On the other hand, the circuit configuration of the frame-sequential imaging system tIl device 27 is as shown in FIG. 3, for example. In FIG. 3, the electrical signal output from the frame-sequential scope is extracted as a video signal by a sample bold circuit 38, further subjected to γ correction by a γ correction circuit 39, and then converted into a digital signal by an A/D converter 40. be done.

This electrical signal is switched by the multiplexer 41 in synchronization with the color plane sequential illumination, sequentially red.

R frame memory 42.G frame memory 43.corresponding to each color of green and blue. It is stored in the B frame memory 44. Each of the frame memories 42, 43 and 44 is connected to the monitor 29.
The signals are read out simultaneously in the horizontal direction at a speed matched to the display devices such as the above, and are converted into analog signals by D/A converters 45, 46, and 47, respectively, to become R, G, and B color signals. By inputting these R, G, and B signals to the monitor 29, the observed region is displayed in color.

Incidentally, in the above-described embodiment of the present invention, the common power supply device 3
1. Light source device 13.14.11i! Image control device 26.2
7. The superimposer 28 and the keyboard 30 have been described as an example of a configuration in which they are each independent units, but the light source device 13
．． 14, - The image control device 26 and 27 may be integrated as one unit, or the superimposer 2 may be attached to this.
8 may be added to form a single unit. Further, the common power supply device 31, the superimposer 38, and/or the keyboard 30 may be formed into an integrated unit, or if necessary, the respective devices may be combined into an integrated structure.

Incidentally, in the present invention, the simultaneous type television camera and the frame sequential type television camera connected to the fiberscope can of course be connected to respective suitable imaging control devices.

[Effects of the Invention] As explained above, according to the present invention, a common power supply device is made independent from each necessary device such as a light source device or an imaging control device, these devices are miniaturized, and the duplication of power supply units is avoided. It has the effect of being poetic without any confusion.

[Brief explanation of the drawing]

1 to 3 relate to an embodiment of the present invention, in which FIG. 1 is a block diagram illustrating the overall configuration of an endoscope device, FIG. 2 is a block diagram illustrating an example of a simultaneous imaging control device, FIG. 3 is a block diagram showing an example of a frame-sequential imaging III tel device. 13... White light source device 14... Frame sequential light source device 26... Simultaneous imaging system 6'l+ device 27... Frame sequential type ril image control device 31... Common power supply device

Claims (1)

[Claims] At least two or more of the white light source device that supplies white light, the field sequential light source device that supplies sequentially switched light, the simultaneous imaging control device, and the field sequential imaging control device share the power supply unit. 1. A common power supply device for an endoscope, characterized in that the power supply section is made into an independent unit.