JPH0426281A - Image pickup device - Google Patents

Abstract

PURPOSE:To easily display a magnified or reduced reproducing video by projecting a video displayed on a video display element on a screen via a lens. CONSTITUTION:A reproducing video by the video display element 22 is projected via the lens 1, and the image of the optical image of an object 15 is photoelectrically converted by an image pickup element 2, and is recorded on a magnetic tape 13. The video signal reproduced from the magnetic tape 13 is recovered to an original video signal at a reproduction processing circuit 9, and is sent to the video display element 22. The reproducing video, after being emitted to a lens optical system 21, is reflected on a mirror 20, and is made incident on the lens 1. An original image can be projected by magnifying or reducing by adjusting the position of the screen 24 and performing the focus adjustment of the lens 1. In such a way, it is possible to effectively use the lens not being used in a case other than image pickup in reproduction, and to easily display the reproducing video in which a reproducing image can be magnified or reduced arbitrarily in a size easy to observe.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an imaging device having a lens optical system.

[Conventional technology]

FIG. 4 is a block diagram of the main parts of a conventional imaging device, and shows a camera-integrated VTR that integrates a video camera and a video tape recorder (VTR). FIG. 4 is a diagram showing only the main parts of the video system, and the audio system, drive system, and other components of the camera-integrated VTR are omitted. In Fig. 4, 1 is an imaging lens for imaging the subject, 2
3 is an image sensor that converts the subject image formed by the lens 1 into an electrical signal, 3 is a camera circuit that converts the output signal of the image sensor 2 into a video signal, 4 is a changeover switch, and 5 is a viewfinder that monitors the video signal. , 6 is an input selector switch, 7 is an external video signal input terminal, 8 is a recording processing circuit for recording the video signal on the magnetic tape, and 9 is for restoring the signal reproduced from the magnetic tape to the original video signal. A reproduction processing circuit, 10 a signal changeover switch, 11 a magnetic head recording/reproduction changeover switch, 12 a magnetic head,
13 is a magnetic tape as a recording medium, 14 is a video signal output terminal, and 15 is an example of a subject to be imaged.

Note that components 1 to 5 above are included in the video camera section, and components 6 to 14 are included in the VTR section.In recent years, imaging devices that integrate these components and are miniaturized for convenient portability have become widely available on the market. It is released in.

Next, the operation of this conventional example will be explained. The object 15 is imaged by the lens 1, and a CCD (Char
An image is formed on the surface of an image sensor 2 made of a charge-coupled device. This formed optical image is photoelectrically converted by the image sensor 2 to obtain an electrical signal. The image sensor 2 has, for example, 330,000 effective pixels on its imaging surface.

Depending on the intensity of light at each part of the formed image, the optical signal is converted into an electrical signal by the charge accumulated in the corresponding pixel. The signals of these pixels are sequentially read out and applied to the next camera circuit 3. The camera circuit 3 converts the signal sent from the image sensor 2 into a luminance signal and a color signal, and further adds a synchronization signal, a color burst signal, etc. to create a video signal. The video signal thus obtained is sent to the next input changeover switch 6. The input selector switch 6 is a switch that selects either the imaging signal obtained from the camera circuit 3 or the external video signal input from the external video signal input terminal 7. When selecting the imaging signal, the contact is closed. Connected to the CAM terminal shown in the figure. C
The imaging signal introduced from the AM terminal is applied to the next recording processing circuit 8. In the recording processing circuit 8, the video signal is frequency modulated, for example, and converted into a signal that can be easily recorded on the magnetic tape 13. This converted signal is guided to the magnetic head 12 from the recording side contact R of the next changeover switch 11. The magnetic head 12 transfers the converted video signal to the magnetic head 11.
Record in 3. The input selector switch 6 is EXT as shown in the figure.
When switched to the side contact, the video signal introduced from the external video signal input terminal 7 is recorded instead of the video signal from the camera circuit 3.

When checking the image signal etc. during recording, by connecting the changeover switch 4 to the recording side contact R, the input video signal is guided to the viewfinder 5 and an optical image is obtained.

The viewfinder 5 is an ultra-small television device that includes, for example, a 273-inch cathode ray tube, and the input image can be monitored by looking into the small tube surface with the right or left eye.

Next, when reproducing the video signal recorded as described above, the recording trace recorded on the magnetic tape 13 by the magnetic head 12 is scanned by the magnetic head 12, and the recorded magnetization on the magnetic tape 13 is scanned. The converted signal is converted into an electric signal, and the reproduced signal is guided to the reproduction processing circuit 9 through the reproduction side contact P of the changeover switch 11. In the reproduction processing circuit 9, for example, a frequency modulated signal as described above is reproduced, and the reproduced signal is restored to the original video signal by performing frequency demodulation. This restored video signal is led to the video signal output terminal 14, from which a reproduced video signal can be obtained.

If the changeover switch 4 is connected to the playback side contact P, the playback image can also be viewed through the viewfinder 5.

Note that when the video is to be led to the video signal output terminal 14 during recording, the changeover switch 10 is connected to the recording side contact R. This makes it possible to monitor the video signal being recorded at the video signal output terminal 14.

As described above, when recording an optical image, the image taken by the camera section is converted into an electrical signal and recorded on the VTR section.

Also, when recording external video signals, select switch 6.
Select manual power and record it on the VTR section. At this time, the video signal is monitored using the viewfinder 5, reproduction fogging processing circuit 9, video signal output terminal 14, etc. as necessary.

When reproducing, the VTR section is operated to guide the video signal to the viewfinder 5 or the video signal output terminal 14 to obtain a reproduced video signal.

[Problem to be solved by the invention]

Conventional imaging devices are configured as described above, so in order to view the reproduced video signal, you either need to look into the viewfinder or send the video signal to another TV, etc. via a cable from the video signal output terminal. You need to look at the reconstructed image.

Further, since the viewfinder is small, it can only be viewed by one person, and in the latter case, another television is required, which requires additional effort and effort to connect cables.

Further, there is a problem in that the lens in the above-mentioned image pickup device is required only during recording, and does not have any effective role during playback.

This invention was made in order to solve the above-mentioned problems, and its purpose is to provide an imaging device that can effectively utilize the lens during playback and can easily display enlarged or reduced playback images. do.

[Means to solve the problem]

The imaging device according to the present invention includes a video display element 22 that displays an optical image of a subject 15 using a video signal restored by a reproduction processing circuit 9, and displays the image displayed on the video display element 22 on a screen via a lens 1. It is characterized by being configured to project onto 24.

[Effect]

The video display element 22 displays an image of the subject 15 using the video signal restored by the reproduction processing circuit 9. This displayed image is projected onto the screen 24 via a lens.

〔Example〕

FIG. 1 is a block diagram of main parts of an imaging apparatus according to an embodiment of the present invention, and components corresponding to those shown in FIG. 4 are given the same reference numerals and their explanations will be omitted. In FIG. 1, 20 is a mirror, 21 is a lens optical system, and 22 is an image display element composed of, for example, a liquid crystal, which displays an optical image of the subject 15 based on the image signal restored by the reproduction processing circuit 9.
23 is a floodlight lamp, 24 is a screen, and 25 is an enlarged and projected reproduced image of the subject 15.

Next, the operation of this embodiment will be explained. The same parts as in the conventional example operate in the same way, so their explanation will be omitted.

In FIG. 1, ti to image and record the subject's weight 5;
The mirror 20 is removed from the optical path system from the lens 1 to the image pickup device 2 by a mechanism such as a hinge 1 link or the like using a method not shown. Therefore, an optical image of the subject 15 is formed on the surface of the image sensor 2.

This image is photoelectrically converted by the image sensor 2, and recorded on the magnetic tape 13 in the same manner as described in the conventional example below.
Further, this image pickup signal is monitored by a viewfinder 5 or the like. Furthermore, an external video signal can also be recorded using the switching switch 7-chi 6 in the same manner as in the conventional example.

Next, when playing back the video signal recorded in this way,
A reciprocal video signal is obtained from the viewfinder 5 or the video signal output terminal 14 in the same manner as in the prior art.

Now, in this embodiment, furthermore, the image display element 22
It is configured such that the i image is projected through the lens 1. That is, the mirror 20 is moved as necessary during playback.
It is inserted into the optical path system between the lens 1 and the image sensor 2 by a mechanism not shown. As a result, an optical path system is formed by the lens 1, the mirror 20, and the lens optical system 21. In such an optical path system configuration state, the video signal reproduced from the magnetic tape 13 is restored to the original video signal by the reproduction processing circuit 9, and then sent to the video display element 22. The video display element 22 has a video display function similar to that of a liquid crystal television, for example, and the reproduced video reproduced on the video display element 22 is emitted to the lens optical system 21 by projecting light with a floodlight lamp 23. be done. This reproduced image passes through the lens optical system 21, is reflected by the mirror 2o, and is reflected by the lens 1.
The reproduced image is further emitted from the lens 1. By placing the screen 24 in front of the lens 1 and adjusting the focus of the lens 1, a clear image can be projected. By appropriately adjusting the position of the screen 24 and the focus of the lens 1, it is possible to enlarge or reduce the original image and project it. In this embodiment, the mirror 20. Lens optical system 21.
The image display element 22 and the floodlight lamp 23 are built into the main body of the imaging device, and only the mirror 20 can be used to switch the optical path; however, depending on the form of the device, some or all of these optical path components can be attached and removed as a unit. It may be configured in a similar structure. Further, a configuration may be adopted in which the position of the lens 1 is changed in order to convert the optical path system.

Further, in the above embodiment, another optical path system is configured between the lens 1 and the image sensor 2, and the image by the image display element 22 is transferred to the lens 1.
However, it is not necessary to have such a configuration.

FIG. 2 is a block diagram of another embodiment of the present invention.

In this embodiment, the same optical path system can be used both for recording and for projecting reproduced images. Further, in this embodiment, the image pickup device 2 and the video display device 22 are integrated. That is, the integrated configuration includes, for example, as shown in FIG. 3, imaging pixels (C
This is a composite element 30 in which a CDCD pixel and a liquid crystal display pixel (LCD pixel) are mixed. With such a configuration, in the case of recording, an optical image is photoelectrically converted by the imaging pixel of the composite element 30 and recorded on the magnetic chip 113 in the same manner as in the conventional example. During reproduction, a video signal is obtained in the reproduction → signal processing circuit 9 in the same way as in the conventional example, and a part of this video signal is sent to the video display section (LCD pixel) of the composite element 30 and displayed on this surface. The playback video is displayed. This image is emitted toward the lens 1 by the projection lamp 23 and projected onto the screen 24. As in the first embodiment, by appropriately adjusting the position of the screen 24 and the focal length of the lens 1, an enlarged or reduced image of the original image can be displayed on the screen 24.
will be displayed on the screen.

Note that instead of the composite element 30, the image pickup element 2 and the video display element 22 may be replaced independently during recording and reproduction.

Each of the above embodiments is an example of a camera-integrated VTR, but
It goes without saying that the system is not limited to this, and can be widely applied to electronic still cameras and other systems configured to capture an object with a lens, store the image on a recording medium, and reproduce the stored image. .

〔Effect of the invention〕

As described above, according to the present invention, a video display element is provided in addition to the image sensor, and when capturing an image of a subject, the subject image incident through the lens is photoelectrically converted, and when playing back, the video display element converts the reproduced video signal into an optical video. However, since the image is projected onto the screen via a lens, the lens that was not used for other purposes can be effectively used for playback, and the repopulated image can be enlarged or reduced to any size that is easy to see. Thus, the effect of easily displaying the reproduced video can be obtained. Furthermore, according to the present invention, since the reproduced image can be projected as an optical image, it can be used on any surface that requires a receiver such as a television, such as a wall in a room, a sliding door, etc., as long as it can be used as a screen. It is possible to project a recursive image even on the screen, thereby providing an extremely convenient imaging device for the user.

[Brief explanation of drawings]

The first leap is a configuration diagram of the main parts of an imaging device according to one embodiment of the present invention, and FIG. 2 is a diagram of the main part construction of an imaging device according to another embodiment.
FIG. 3 is a diagram showing an example of a composite element in another embodiment,
FIG. 4 is a block diagram of the main parts of a conventional imaging device. DESCRIPTION OF SYMBOLS 1... Lens, 2... Image pickup element, 3... Camera circuit, 8... Recording processing circuit, 9... Playback processing circuit, 1
3... Magnetic tape (recording medium), 15... Subject,
22... Video display element, 24... Screen. Agent Patent Attorney Miyazono Pure Diagram Procedural Amendment (Voluntary) Indication Patent Application No. 131624 No. 131624 of Heisei J/σ Month λ Day Case No. 3, representative of the person making the amendment Moriya Ki 5 of the specification to be amended Column for detailed description of the invention. a Contents of correction il+ In the 9th line of page 6 of the specification, the phrase "Input to changeover switch 6" is corrected to read "Input external video signal manually by changeover switch 6."that's all

Claims (1)

[Claims] A lens for capturing an image of a subject, an image sensor that converts the image of the subject formed by this lens into an electrical signal, a camera circuit that converts the output signal of this image sensor into a video signal, and a video signal that is output from this camera circuit. In the imaging device, the imaging device includes a recording processing circuit for recording a video signal recorded on a recording medium, and a reproduction processing circuit for restoring the signal reproduced from the recording medium to the original video signal, the reproduction processing circuit comprising: An imaging device comprising: a video display element that displays an optical image of the subject using a restored video signal; and the image displayed on the video display element is projected onto a screen via the lens.