JPH09113816A - Image display device of composite camera - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily confirm the view angles of a video camera and a silver salt camera by providing a visual field display circuit with a switching means for switching display fields of the silver salt photography and video photography. SOLUTION: An image of an object is picked up at a given view angle and while a silver salt film 5 is exposed to part of the image through a reflecting mirror, etc., the other is converted to a 1st video signal by a video processing system 40. The 1st video signal is inputted to a video zoom circuit 41 to cut a specific range, which is zoomed up or enlarged to output a 2nd video signal. The 1st video signal and 2nd video signal are inputted to a video output processing circuit 42 and the 1st or 2nd signal output is displayed on an electronic viewfinder EVF 45 with the signal from an output switching controller 43 based upon a user's indication. The EVF 45 switches the 1st video signal output and 2nd video signal output to enable the both to be observed through one viewfinder.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a silver salt having a video signal zoom function, a video-integrated single-lens compound camera, and an image display device of the compound camera for photographing a moving image and a still image.

[0002]

2. Description of the Related Art Conventionally, an electronic viewfinder used in a silver salt video integrated single-lens camera includes a field of a silver salt camera and means for visually displaying a video image angle of view inside the field of view. A video camera with a still camera is proposed.

[0003]

However, in the above-mentioned conventional example, when the zoom ratio of the video camera unit is larger than the zoom ratio of the silver halide camera unit, the display area of the video angle of view becomes small and the video field of the video field is reduced. There was a drawback that it was difficult to confirm.

An object of the present invention is to easily confirm the angle of view of the video camera and the silver salt camera by switching the angle of view signal of the silver salt camera and the angle of view signal of the video camera and displaying them in the viewfinder. Can be done

[0005]

In order to achieve the above object, the first invention is to display the angle of view of a silver halide camera and the first signal processing means for displaying the angle of view of a video camera. 2. An image display device of a silver salt / video integrated compound camera having the second signal processing means, characterized by comprising means for switching and displaying the first and second signal processing means.

A second aspect of the present invention is an image display device of a silver salt / video integrated type composite camera having a viewfinder for displaying the angle of view of the video camera and the angle of view of the silver salt camera. Means for outputting a field area of the video camera having a separate field to the silver salt camera as a field display area at the time of silver salt shooting, and an image zoom function for the video camera, It is characterized in that it is provided with means for outputting a zoom video signal, and the field-of-view display circuit of the finder has means for switching the display field during silver halide photography and video photography. In this way, it is usually about 80% for silver halide cameras.
It is possible to display the object scene area of the video camera having the object scene area that matches the object scene display area at the time of silver halide photography. Further, also in an image display device of a compound camera having mainly a moving image shooting function and a still image shooting function, the angle of view can be easily confirmed.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION The structure of a compound camera and an electric circuit incorporated in the compound camera will be described below with reference to the embodiments of the present invention, and each embodiment according to the present invention will be described in detail with reference to the drawings. Explained.

FIG. 1 is a left side view for inventing the function of the compound camera of this embodiment. In the figure, reference numeral 1 denotes an exterior cover constituting the present apparatus, which is composed of several parts by fastening parts such as screws, etc., 2 denotes a lens unit for capturing an image on a silver halide film, 3 denotes a lens unit 2, A lens barrel for holding the lens element, 4 is an iris diaphragm for silver halide still photography, and 5 is a silver halide film. In the present embodiment, the lens unit 3 is a zoom lens, and is driven by information from a variable power lens element group that can move on the optical axis in conjunction with automatic or manual zoom operation, and information from an automatic focus adjustment device described later. Focusing lens element group.

A shutter device 6 is arranged immediately in front of the silver halide film, and is composed of a shutter curtain 6a, a shutter frame 6b and the like. Reference numeral 7 denotes a translucent thin film mirror for distributing an image from a subject to a silver halide film side and a video photographing element side, 7a denotes an optical axis of light incident from the subject side, and 7b denotes a light transmitted through the translucent thin film mirror 7. 7c and 7d indicate the optical axes reflected by the translucent thin-film mirror 7 and the reflection mirror 9, respectively. Reference numerals 8a and 8b denote field lenses provided on the optical axis 7c for performing pupil alignment of a subject image, 9 denotes a reflection mirror for deflecting the photographing optical axis 7c, and 10 denotes an optical axis 7
and a video aperture unit 11 for capturing video moving images. Reference numeral 12 denotes an optical low-pass filter, and reference numeral 13 denotes a solid-state imaging device. Here, one of the distance measuring means is a hill-climbing method (a type of contrast detection method) using a conventionally known video signal.
Since a subject image is obtained on the solid-state imaging device 13, a high-frequency video signal is extracted from the photoelectrically converted video signal of the solid-state imaging device 13, and a high-frequency video signal is extracted based on the high-frequency video signal level. Focus detection is performed with the point at which the signal peaks as the focus match.

Numeral 14 is an aerial image formed at a position equivalent to the silver salt film 5, and the reduction lens unit 1
The image is re-imaged on the solid-state imaging device 13 through the line 0. In this way, the aerial image 14 is guided by the retractable sub-mirror to the automatic focus detection device 15 by the retractable sub-mirror when the still image is photographed behind the translucent thin film mirror 7.

The automatic focus detection device 15 in this embodiment
Has a distance measuring means based on a phase difference deviation detection method among one of two detecting means (distance measuring). In this phase difference deviation detection method (a type of pupil division phase difference detection method), a light beam from a photographing lens is divided into two in a predetermined distance measurement area, and a focus state is determined by observing a difference between two images. The focus position is detected by the detection means in the automatic focus detection device 15 which is arranged at the same position as that for detecting the direction of the defocus amount on the film surface 5.

Further, reference numeral 16 is a light shielding plate which can be retracted at the time of photographing to prevent light leakage because the semitransparent thin film mirror 7 is used.

Reference numeral 17 denotes a back lid unit which is openable and closable when the silver salt film 5 is loaded. In this embodiment, the 135 type silver halide film 5 is used.
It is not necessary to limit to this, and even if it is a film of a drop-in type, a disk type or the like, there is no problem.

Reference numeral 18 denotes an electronic viewfinder unit which outputs an image to a small liquid crystal 19 for monitoring the image signal from the solid-state image pickup device 13 and observes it through a reflecting mirror 20 and an eyepiece lens 21. The viewfinder unit 18 uses the rotating shaft 22 as a support shaft,
It can rotate up and down. In the configuration shown in the figure, the iris diaphragm 4 for photographing a silver halide still image is used for shooting a video moving image.
Is always kept in an open state, and is narrowed down to a predetermined diameter when a relay switch for silver halide still photography described later is pressed. Therefore, when capturing a moving image, exposure control is performed only by the video aperture unit 11 in the reduction lens unit 10, and an appropriate exposure is obtained by changing the accumulation time of the imaging element and the gain of the signal processing system as needed.

Further, reference numeral 23 denotes a rechargeable battery which is detachably attached to the lower portion of the apparatus, and is a common single power source for supplying all the power used by the apparatus. An openable / closable barrier 25 incorporating a strobe light 24 is disposed in front of the lens unit 3. Reference numeral 26 denotes a microphone for recording audio during video shooting, and reference numeral 27 denotes an external terminal as an interface with an external device such as a television or a stereo device.

Next, FIG. 2 is a top view of the compound camera of FIG. 1 according to this embodiment. In the figure, 1 is an exterior cover as described above, 28 is a cartridge chamber for the silver salt film 5, and 29 is a spool for winding the film. In the present embodiment, a prewind system is adopted in which the last frame is wound up on a spool in advance when a film is loaded, and the exposed frames are sequentially rewound during photographing.

Reference numerals 30 and 31 are a zoom driving motor and a focus driving motor of the taking lens. Reference numeral 32 denotes a zoom button disposed at a position operable by the photographer's right hand, 33 denotes a main mode selection switch also serving as a power switch, 34 denotes a trigger button for video / video shooting, and 35 denotes a two-step switch. It is a switch for still photography that can be used when shooting silver halide alone and simultaneously when shooting a moving image and silver halide simultaneously, corresponding to the switch 1 (photographing preparation) and the switch 2 (release) that are well-known in silver halide photography. is there.

On the side opposite to the operating member, a program exposure mode, a portrait mode with many open apertures, a sports mode with shutter speed priority, a retrograde mode, etc. can be selected and used in common for both moving image shooting and still image shooting. The mode selection dial 36 is arranged.

The photometry is feedback-controlled for the various modes according to the luminance signal level of the solid-state image pickup device 13. In this embodiment, the video image pickup device is electrically divided into areas and is also used as a photometric device, but a dedicated photometric device may be separately provided.

Reference numeral 37 denotes a video tape cassette housing portion arranged on the right side of the lens unit 2, and in this embodiment, a video tape having a tape width of 8 mm is used as a video recording medium. The cassette storage unit has a recording mechanism including a magnetic head cylinder, a capstan, a pinch roller, and the like. On its upper surface, a control panel 38 for controlling recording and reproduction of a video tape, etc., and instructs an automatic loading operation. Button 39 and the like are arranged.

The structure of the compound camera used in this embodiment has been described in detail above, but the present invention is not limited to the compound camera having the above-described structure.

Next, FIG. 3 is a simplified block diagram for explaining the configuration of the system control of this embodiment.

In the figure, a is a camera microcomputer, which controls video exposure control, video white balance and other video control processing, lens zoom control and automatic focus detection control (auto focus control), automatic winding, and exposure control. Performs control processing and the like.

Reference numeral b is a servo microcomputer, which controls the recorder mechanical deck o to perform reproduction and recording.

Further, c is a mode microcomputer, which receives various switch information including the switch 1 and the switch 2 from the switch sense circuit k, determines a mode, etc., and sequentially operates the camera microcomputer a, the servo microcomputer b, and the liquid crystal display circuit l. It communicates and displays and controls each microcomputer.

Further, d is a lens control circuit, which controls a distance ring of a taking lens (not shown) in accordance with a control signal from the camera microcomputer a, and is optimal together with a focus detection unit g incorporated in the automatic focus detection device 15 during AF operation. It is placed at the proper shooting lens position. Reference numeral e denotes a zoom control circuit which controls a zoom ring (not shown) according to a control signal from the camera microcomputer a. f denotes film feeding, which controls the winding of one frame or the feeding control such as prewind in accordance with the control signal of the camera microcomputer a.

Further, g is a phase difference type focus detection unit built in the automatic focus detection device 15, which is composed of several line sensors corresponding to the screen and a drive circuit, and the drive circuit accumulates the sensors. Control is performed, and the camera microcomputer a receives the accumulated data (image signal of the subject) of each sensor, and detects which position the subject is focused by the photographing lens by calculation by the existing phase difference detection method. It is like this.

A shutter control circuit h controls a shutter unit (not shown) according to a control signal from the camera microcomputer a. Reference numeral i denotes an aperture control circuit that performs aperture control of the main lens and aperture control of the reduction optical system based on information from the camera microcomputer a. j is a strobe light emission control circuit, that is, a circuit for controlling strobe light emission and dimming, a circuit for storing electric charge for light emission, a xenon tube as a light emitting portion, a trigger circuit, a circuit for stopping light emission, a film, It consists of an existing circuit such as a surface reflection light metering circuit and an integrating circuit, and the flash of the strobe starts when the X contact which is turned on by the front curtain of the shutter unit is turned on.

Further, k is a switch sense circuit, which constantly detects the switch state, and various switches including a video movie shooting trigger switch, a still shooting preparation switch 1, and a release switch 2 in response to a command from the mode microcomputer c. Communicate information. Accordingly, the mode microcomputer c determines that the video movie shooting mode is set when the video movie shooting trigger switch is turned on and the still shooting preparation switch 1 is turned off. If the switch 1 is turned on, it is determined that the camera is in the still shooting mode. If the trigger switch for video / moving image shooting is turned on, and if the switch 1 for preparing to shoot still is also turned on, it is determined that the simultaneous shooting mode is set.

Further, 1 is a liquid crystal display circuit, which displays the remaining battery amount and the like in response to a command from the mode microcomputer c. m denotes an audio control circuit which performs processing such as amplification of an audio signal from a microphone and outputs the signal to a recorder mechanical deck o.

Further, n is an electronic viewfinder which receives a video signal from the recorder mechanical deck o and monitors the video. Reference numeral o denotes a recorder mechanical deck, which controls reproduction, recording, search, and the like according to instructions from the servo microcomputer b. p is a digital signal processing circuit that performs digital signal processing on image data from the CCD, and a recorder mechanical deck o.
Output to q is a CCD of a photoelectric conversion element, which outputs image data. Also, the CCD q performs a hill-climbing automatic focus detection during video moving image shooting, and a digital signal processing circuit p.
As a result, a high-frequency component of a detected image signal is detected only in a distance measurement area, which will be described later, as an area sensor, and a lens position is determined through a lens control circuit at a position where a peak signal is obtained for the object. In this manner, the lens position is determined from the results of the hill-climbing distance measuring means and the distance measuring means, and the focus is matched.

Although the configuration example of the system control of the compound camera has been shown above, it goes without saying that the present invention is not limited to this.

(First Embodiment) FIG. 4 is a block diagram best showing the features of this embodiment. In the figure, a main lens 2a including a zoom lens and a diaphragm captures an image of a subject at a predetermined angle of view, adjusts a focal length, and a part thereof is exposed to the silver salt film 5 through a reflection mirror or the like, CC of a photoelectric conversion element through a reduction optical system 2b including an optical zoom such as a reflection mirror, a reduction lens unit 10, a video aperture unit 11, and an optical low-pass filter 12.
It is projected on the DI 13 and converted into an electric signal. The converted electrical signal is read with a predetermined synchronization signal, spike noise is removed, γ characteristic is corrected to suppress the blooming phenomenon, 1 /
The video processing system 40 corresponding to the second signal processing means for suppressing f noise or the like becomes the first video signal. The first video signal is input to a video zoom circuit 41 corresponding to a first signal processing means including a frame memory, for example, to cut out a specific range desired by the user, zoom up or enlarge an image, and The video signal of is output. The second video signal is output to the recording signal processing circuit 44, and the video signal is recorded on a recording medium such as a video tape or a video disc.

Further, the first video signal and the second video signal are input to the video output processing circuit 42, and the first video signal or the second video signal is generated by the signal from the output switching control 43 according to the user's instruction. The signal output is displayed on the EVF (electronic viewfinder) 45. The EVF 45 is commonly used for shooting a silver salt film for shooting a still image and for shooting a video particularly for shooting a moving image, and outputs the first video signal and the second video signal.
It is possible to observe both from one viewfinder by switching the video signal output of the above. Here, the angle of view exposed on the silver salt film with different zoom ratio and the angle of view to the video film are switched and output to the viewfinder, so the contents displayed on the viewfinder at the time of shooting can be confirmed Can be done.

(Second Embodiment) The structure of this embodiment is different from the composite camera shown in FIG. 1 in that it has a photoelectric conversion element dedicated to a silver salt film for taking a still image.

In FIG. 5, a subject optical image of the main lens 2a including a zoom lens and a diaphragm is partially converted into an electric signal by the CCD 2 (13b) of an optical conversion element, and the other part is a reduction optical including an optical zoom. Input to system 2b. In the reduction optical system 2b, the CCDI (13
Input to a). The photoelectric conversion signal is read from the CCDI (13a) with a predetermined synchronizing signal, and the predetermined correction is performed similarly to the first embodiment, and the photoelectric conversion signal is further input to the video processing system I (40a) having a video zoom function, which is desired. A video signal can be obtained by setting the angle of view, and the video signal is mainly recorded in the recording medium by the recording signal processing circuit 44. In addition, the photoelectric conversion signal is read from the CCD II (13b) with a predetermined synchronization signal, input to the image processing system II (40b) for performing a predetermined correction and adjusting to a predetermined angle of view, and a silver salt portion video signal for a still image is input. obtain. Video processing system I (40a)
And the output of the video processing system II (40b) are input to the video output processing circuit 42. Here, a video portion video signal mainly for moving images or a silver salt portion video signal mainly for still images is selected according to the output switching signal of the output switching control circuit 43 instructed by the user, and the electronic viewfinder (EV) is selected.
F) Output to 45 and display.

Thus, the field-of-view display circuit of the EVF 45 is provided with a switching means for switching the display field during silver salt shooting and during video shooting, so that the angle of view of the video camera and the silver salt camera having a field near 100% can be obtained. Can be easily confirmed.

In the present embodiment, CCDs are individually provided and the angle of view can be set according to the size and density of each pixel, so that a more accurate angle of view can be set and confirmed.
In the present embodiment, the shooting for silver halide film and the shooting for video have been described, but shooting for moving images and still images may be performed, and further, a digital video camera and a digital camera may be integrated to realize the present invention. It is also possible to carry out.

[0039]

As described above, according to the present invention,
In a silver salt video integrated camera having different zoom ratios of the silver salt portion and the video portion, each has a good electronic viewfinder image display means for each, and the angle of view can be easily confirmed.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a silver salt / video integrated single-lens camera according to a first embodiment of the present invention.

FIG. 2 is an external view of a silver salt / video integrated single-lens camera according to the first embodiment of the present invention.

FIG. 3 is an electrical block diagram of a silver salt / video integrated single-lens camera according to the first embodiment of the present invention.

FIG. 4 is a conceptual configuration block diagram according to the first embodiment of the present invention.

FIG. 5 is a conceptual configuration block diagram according to a second embodiment of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 camera body exterior 2 lens unit 4 silver halide iris diaphragm 5 silver halide film 7 translucent thin film mirror 10 reduction lens unit 11 video aperture unit 13 CCD 28 patrone room 29 spool 30 zoom drive motor 31 focus drive motor 32 Zoom button 33 Main mode selection switch 34 Trigger button for video / video shooting 35 Switch for still shooting

Claims (3)

[Claims] 1. A silver salt / video integrated camera having a first signal processing means for displaying an angle of view of a video camera and a second signal processing means for displaying an angle of view of a silver salt camera. 2. The image display device for a compound camera, comprising: a unit for switching and displaying the first and second signal processing units. 2. A silver salt provided with a viewfinder for displaying the angle of view of the video camera and the angle of view of the silver salt camera.
An image display device for a video-integrated composite camera, comprising means for outputting a field area of the video camera having a field different from that of the silver salt camera as a field display area during silver salt shooting. A video zoom function for the video camera, a means for outputting a zoom video signal, and a view field display circuit of the finder having a switching means for switching a display field during silver salt shooting and video shooting. The image display device of the characteristic compound camera. 3. An image display device of an integrated compound camera, comprising an image finder for displaying the angle of view of a video camera and the angle of view of a still image camera, the image display device being separate from the still image camera. The field-of-view display means for outputting the field-of-view area of the moving image camera having the field of view to the field-of-view display area at the time of still image shooting, and the video camera having a video zoom function, An image display device of a compound camera, comprising: an image zoom means for outputting; and the field-of-view display means comprising means for switching a display field between the still image shooting and the moving image shooting.