JPH01178233A - Image display apparatus of endoscope - Google Patents

Abstract

PURPOSE:To perform the unification of an image position and to make a character or image easy to see by mounting a detection means for detecting the data signal outputted from an externally mounted TV camera to generate a control signal and a position determining means for determining the position of a display image on a monitor on the basis of the control signal. CONSTITUTION:When the connection detecting signal DET outputted from a connection detecting circuit 29 is applied to a ROM 47, said ROM 47 outputs the set value being the image when an externally mounted TV camera 31 is connected and, when the connection detecting signal DET is not applied, the ROM 47 outputs the set value being the image when an electronic scope is connected. By this method, since an address in a horizontal direction is changed, an image position is changed over. An address in a vertical direction is also similarly changed to output the output of a counter 46 and that of a ROM 48 through a subtractor 51. As mentioned above, by outputting the address in the vertical and horizontal directions, the image position of the output image when the externally mounted TV camera 31 is mounted and that of the output image when an electronic scope 2 is mounted are automatically changed over each other. Therefore, the unification of the image position is attained and both of a character and an image become easy to see.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to an endoscopic image display device equipped with means for determining the display position of an endoscopic image.

[Problems to be solved by conventional techniques and inventions] Recently,
A doublet-type endoscope (not abbreviated as an electronic endoscope or electronic scope) uses a solid-state image device such as a charge-coupled device (abbreviated as COD) instead of an image guide that transmits an optical image. It has been put into practical use, and it is now possible to display M-shaped endoscopic images on a TV monitor.

Also, is there an optical type using a conventional image guide? jA
It has also become common to use a TV camera with built-in imaging means such as a solid-state 1/2 image element in the eyepiece of a mirror to display images on a TV monitor.

When displaying an endoscopic image captured by the TV camera or electronic scope on a TV monitor, an endoscopic image display device that does not have a character display function may display an endoscope image approximately in the center of the TV monitor screen. On the other hand, in an endoscopic image display device that has a built-in character display function, the endoscopic image is slightly shifted from the center, and characters are displayed in the space of this shifted area. However, if the display position of the endoscopic image is always fixed in this way, a separate superimposer can be inserted into the endoscopic image display device, which does not have a character display function, and the TV monitor When the text does not appear on the screen, the screen is centered, so the text can only be entered in the corners, making it difficult to see the text information entered manually.

In addition, when using J5 on an endoscopic image display device with a text display function, if you do not display text at all and only observe the endoscopic VTE, the image is closer to the corner of the TV monitor screen and is difficult to see. Become.

In order to deal with this, the present applicant filed a patent application No. 62-2193.
No. 38 proposes a technique for manually or automatically moving the image position by determining whether or not a character display input device is connected to a camera control unit (abbreviated as CCU).

By the way, the CCU may connect an electronic scope to an external TV camera, but normally it displays text when used in combination with an electronic scope, and displays text when used in combination with an external TV camera. It is common not to. Therefore, although the image position is automatically moved regardless of the type of endoscope as described above, if the same electronic screen or external TV camera is connected, it is not possible to move the 'cb image Kt device. Yes, it was actually difficult to see.

[Object of the Invention] The present invention has been made in view of the above-mentioned circumstances.
Alternatively, the display position of the endoscopic image can be determined depending on the type of endoscope regardless of whether a character display input device is connected, so that the image position is consistent and both the text and the image are easy to see in the endoscopic image. The purpose is to provide a display device.

[Means and effects for solving the problem Fλ 1 The endoscopic image display device of the present invention detects an information signal output from an information signal generation means installed in an external TV camera,
The apparatus is equipped with a detection means for generating a control signal, and a position determination means for determining the position of the displayed image on the monitor based on the control 6+1 signal from the detection means.

The detection means determines whether an external TV camera is connected, and the position determination means moves the image position.

[Example] Embodiments of the present invention will be described below with reference to the drawings.

1 to 5 relate to one embodiment of the present invention, and FIG. 1 shows the endoscopic chain side 8! 2 is a configuration diagram of an external TV camera attached to a fiber scope, 3 is a configuration diagram of a write address control section, 4 is a configuration diagram of a read address control section, and 5 is a configuration diagram of a display device. The figure is an explanatory diagram of a monitor image showing that the display position of the image is determined.

As shown in FIG. 1, the endoscopic image display device 1 of this embodiment includes an electronic scope 2 and a camera control unit (hereinafter referred to as CCU) to which the electronic scope 2 is connected and which performs signal processing.
It is abbreviated as. ) 3, an optical GI device 4 that supplies illumination light to the electronic scope 2, a TV monitor 6 that displays the video signal output from the CCIJ 3, and a character display input device 7 that is externally attached to the CCU 3. Consisting of

In the electronic scope 2, a guide 9 for transmitting illumination light is inserted into an elongated insertion portion 8, and a guide 9 for transmitting illumination light is inserted into the elongated insertion portion 8. By connecting the lFI end face to the light source device 4, the white light from the light source lamp 11 in the CCU 3 is transmitted to the controller 1.
The lens 12 is designed to condense illumination 01. This white light is used as illumination light by the light guide 9.
The light is transmitted to the output Q'l end face on the distal end side of the insertion section 8 and is emitted to the object side via the light distribution lens 13. An optical image of the object illuminated with this illumination light is transmitted to a CCD 16 arranged at the focal plane of this objective lens 14 by a lens 14.
imaged and photoelectrically converted. I≧Oh, this CCD16
For example, a mosaic filter 1 of R, G, and B is placed on the light receiving surface of
7 are arranged.

Upon application of a drive signal from the CCD drive circuit 18 in the CCJ3, the CCD 16 outputs a photoelectrically converted optical image as an image signal (video signal), and this image signal is sent to the process circuit in the CCU3. The signals are input into one signal, processed and converted into a luminance signal Y and a color signal C (representatively representing two color difference signals R-Y and B-Y, for example). These luminance signal Y and chrominance signal C are converted into digital luminance signal DY and chrominance signal DC by A/D converter 21 and input into image memory 22 . This image memory 22 is written by a memory controller 23,
Readout is controlled. This memory controller 23 receives a horizontal synchronization signal HD from a timing generator 24.
, takes in the vertical synchronizing signal VD and the clock signal 04 child SC used for Δ/D conversion and D/A conversion, and controls the image memory 22 by ItII+. CCU) drive circuit 18
The timing generator 24 also takes in a timing signal that defines the read timing, and outputs a drive signal in synchronization with this signal. Also, horizontal synchronization signal 1-
The ID, vertical synchronization signal VD, and clock signal SC are applied to the write-in address control section 25 and the read address control section 32, and the write address system (2 (1 part 2
5 indicates the write address, and the read address control unit 32
generates a read address and sends it to both image media 22.

Digital l! read out from the image memory 22! If
The luminance signal DY- and the digital chrominance signal DC- are converted into an analog luminance signal Y' and a chrominance signal C by a D/Δ converter 26.
' and input to the NTSC encoder 27,
The NTSC system composite video signals C and V are converted into composite video signals C and V, and input to the superimpose circuit 28. This superimpose circuit 28 superimposes the composite video signals C and V and the character information CH sent from the character face water input tJ device 7,
A composite video signal is output to the TV monitor 6, and the video is displayed along with the characters. The above character display human power device 7
has an external synchronization horn terminal, and when a synchronization signal 5YNC from the timing generator 24 in the CCU 3 is applied, it outputs character information CH in synchronization with this synchronization signal 5YNC).

Note that the above write address control section 25, read address control section 32, and memory controller 23 form a position determining means.

Furthermore, the CCU 3 has a connection detection circuit 29 as a detection means, and when the external TV camera 31 shown in FIG. 2 is connected, it sends a connection detection signal DET to the read address control section 32. , read address control section 32
When receiving this connection detection signal DET, the image memory 22
The endoscope image displayed on the TV monitor 6 is positioned at the center of the monitor display screen by shifting the timing of reading from the TV monitor 6.

The external TV camera 31 is a fiberscope 33.
It is attached to the eyepiece section 34 of the camera. This fiber scope 33 is the same as the electronic scope 2 shown in FIG. Eyepiece lenses 37 are arranged to face each other, and observation can be made with the naked eye from behind the eyepiece lenses 37. Also,
An external TV camera 31 can be attached to the eyepiece section 34, so that an optical image transmitted by an imaging lens 38 can be formed on three C0Ds provided with a mosaic filter 40. A drive signal is applied to the CCD 39 from the CCD drive circuit 18 similarly to the electronic scope 2, and the signal read from the CCD 39 is input to the process circuit 19. Further, the external TV camera 31 receives a signal d3 from the detected circuit 41 serving as an information signal generating means, and when connected to CCtJ3, a signal indicating that the external TV camera 31 is connected to the connection detection circuit 29 is sent. is output to the connection detection circuit 29, and the connection detection circuit 29 reads out the connection detection signal D[D] and outputs it to the address control section 32.

a3, the above-mentioned detected circuit 41 is, for example, 0N10F"
As a switch, the connection detection circuit 29 may be able to determine whether the electronic scope 2J3J or the TV camera 31 is connected by 0N10 of this switch.Also,
The terminal and the resistor connected between the terminals may be installed so that they can be determined by a change in the resistance value.

The write address control section 25 is constructed as shown in FIG.

This write address control section 25 has two counters/1
2.43. This counter 42 has a horizontal synchronization signal @HD applied to the clear terminal CLR, a clock signal 94 child SC applied to the clock terminal, and is cleared by the horizontal synchronization signal 1-ID and counted by the clock signal 4fSC. It is a counter. Further, the counter 43 has a vertical synchronizing signal VD applied to a clear terminal CLR and a horizontal synchronizing signal 1-ID applied to a clock terminal CLK, and is cleared by the vertical synchronizing signal VD and counted by the horizontal synchronizing signal +1D in the vertical direction. with the counter of 2
Together, they generate a monthly payment address.

Further, FIG. 4 shows the configuration of the read address control section 32. This read address control section 32 includes two counters 44, 46, two ROMs 47° 48, and two subtracters 4.
9.51. This counter 44
In this case, the horizontal IJ signal ID is applied to the clear terminal CLR, and the clock signal 4-Jsc is applied to the clock terminal CLK. It is a counter.

Further, the counter 46 receives the vertical synchronization signal VD from the clear terminal C.
LR and horizontal synchronization signals 1-4D are applied to the clock terminal CLK, which serves as a vertical counter that is cleared by the vertical synchronization signal VD and counted by the horizontal synchronization signal HD. The output of the counter 44 is RO
It is added to the value output from M47 to generate a horizontal address. This ROM 47 is loaded with the connection detection signal DET outputted from the connection detection circuit 29 as shown in FIG.
C), and when the connection detection signal DET is not applied, the value 1-1 in FIG. 5(b), which is the image when the electronic scope 2 is connected, is output. The setting value corresponding to is output. This changes the horizontal address, so Figure 5(b), (
The image position is switched as shown in c). Similarly, for the vertical address, by adding the output of the counter 46 and the output of the ROM 48 using the subtracter 51, the values V2 and Vl in FIGS. 5(b) and 5(C) are output. By applying the vertical and horizontal addresses in this way, the external TV camera 31 shown in FIG. 5(c) is The image positions of the output image when the electronic scope 2 is attached and the output image when the electronic scope 2 shown in FIG. 5(b) is attached are automatically switched.

゛When using the electronic scope 2 by providing the detected circuit 41 on the external TV camera 31 as in this embodiment, the image display position is shifted from the center and the external TV camera 3
1, the image can be displayed in the center.

[5′! ! Brightness Effect 1 As described above, according to the present invention, camera control [1-
The display position of the endoscopic image can be determined depending on the type of endoscope, regardless of whether the unit has a character display function or whether a character display input device is connected.
It is possible to obtain an endoscopic image in which the image position is uniform and both text and images are easy to see.

[Brief explanation of the drawing]

1 to 5 relate to one embodiment of the present invention; FIG. 1 is a configuration diagram of an endoscopic image display device, FIG. 2 is a configuration diagram of an external TV camera attached to a fiber scope, and FIG. 4 is a block diagram of the write address control section, FIG. 4 is a block diagram of the read address control section, and FIG. 5 is an explanatory diagram of a monitor image showing that the display position of the image is determined. 1... Endoscope image display device 2... Electronic scope 3... Camera control unit 6... TV monitor 23... Memory controller 25... Write address control unit 29... Connection detection circuit 31... External TV camera 32... Read address control section 41... Detected circuit

Claims (1)

[Scope of Claims] An endoscopic image display device that can connect an external TV camera attached to an electronic scope or a fiber scope and display endoscopic images obtained by the electronic scope or fiber scope on a monitor screen, a detection means for detecting the information signal output from the information signal generation means provided on the external TV camera and generating a control signal; An endoscopic image display device comprising: position determining means for determining a display position;