JPH03187681A - Camera unified type video tape recorder - Google Patents

Abstract

PURPOSE:To enjoy a recorded video reproduced with a recording and reproduction circuit by a large number of persons simultaneously by utilizing a liquid crystal view finder prepared as an image pickup monitor as a liquid crystal projector. CONSTITUTION:When the recording and reproduction circuit 5 reproduces the recorded video, an optical path switching means 22 is operated, and light transmitting a liquid crystal panel 11 in the liquid crystal view finder 9 is introduced to an image pickup lens system 2, and is projected to the outside on a route opposite to that in image pickup. In such a way, the liquid crystal panel 11 in the liquid crystal view finder 9 can be utilized as a video source for the projector, and also, a projector function can be easily attached by utilizing the image pickup lens system 2 as an optical path for a projection video. Also, as the optical path switching means, since a simple optical element such as a movable prism 22, or a movable light shielding member, etc., arranged in the image pickup lens system 2 and the liquid crystal view finder 9 can be used, an excessive cost can be evaded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a camera-integrated video tape recorder that is equipped with a projector function using a liquid crystal panel in a liquid crystal viewfinder.

"Prior Art" A conventional camera-integrated videotape recorder 1 shown in FIG. The video image formed on the image sensor 3 is supplied to the recording/reproducing circuit 5 via the signal processing circuit 4. In the recording/reproducing circuit 5, the video signal supplied from the signal processing circuit 4 is transmitted to a rotating magnetic head ( (not shown) on a magnetic tape, and a sound collecting microphone 7 via a recording circuit 6.
With the exception of some high-fidelity H-sound machines, the audio signals sent from the machine are normally recorded on magnetic tape via a fixed head (not shown). A liquid crystal drive circuit 10 in a liquid crystal viewfinder 9 is connected to the signal processing circuit 4 via a changeover switch 8 that changes between recording and playback.
The recorded video signal is displayed on a liquid crystal panel 11 driven by a liquid crystal drive circuit 10.

Since the liquid crystal panel 11 is not a self-luminous element, the light emitted by the light source 12 serving as a backlight is also irradiated from behind.
The light transmitted through the liquid crystal panel 11 is viewed through the eyepiece lens 14. The LCD viewfinder 9 is used not only as a recording monitor, but also as a playback monitor for personal viewing of the played video when the changeover switch 8 is switched to the recording/playback circuit 5 side and a recorded magnetic tape is played back. also works.

15 is a system control circuit that centrally controls the entire system;
The signal processing circuit 4 and the recording/reproducing circuit 5 as well as the focus lens 16 and zoom lens 17 incorporated in the imaging lens system 2 are controlled via the drive circuit 18.

[Problems to be Solved by the Invention] Although the conventional camera-integrated videotape recorder l is equipped with a liquid crystal viewfinder 9, the role played by this liquid crystal viewfinder 9 is only to determine the appearance of the subject. The main focus is on the recording monitor function, which provides judgment material for checking and determining shooting angles in real time, and the playback monitor function, which plays back and confirms recorded video, is comparable to the recording monitor function. However, since only one person can physically view the replayed video, it cannot be called a replay monitor in a broad sense. That is, when a large number of people watch the reproduced video at the same time, it is necessary to connect a video monitor such as a CRT receiver to the video output terminal 19 provided in the recording and reproducing circuit 5, and the camera-integrated video tape recorder 1 The problem was that it was not possible for a large number of people to watch the playback video at the same time.

Also, regarding the playback audio, it is best for only one person to listen to it through the earphones connected to the recording monitor terminal, and if a large number of people listen to the playback audio at the same time, the recording/playback circuit 5 may be It is necessary to connect an amplifier and a speaker to the audio output terminal 20, and as with the case of the reproduced video, there was a problem in that a large number of people could not listen to the reproduced audio at the same time using the camera-integrated video tape recorder l alone.

[Means for Solving the Problems] The present invention solves the above problems, and provides a camera-integrated video camera that records images obtained through an imaging lens system using a recording/playback circuit and displays them on a monitor on a liquid crystal viewfinder. In the tape recorder, when the recording/playback circuit plays back the video that has been #l#, the light that has passed through the liquid crystal panel in the liquid crystal viewfinder is guided to the imaging lens system, and the light is guided through a path opposite to that during imaging. A camera-integrated video tape recorder which is characterized by being equipped with an optical path switching means for projecting the image to the outside, and further records the video obtained through the imaging lens system using a recording/playback circuit, and displays the video on a monitor on a liquid crystal viewfinder. and includes a projection optical system that is integrated with the liquid crystal panel of the liquid crystal viewfinder and projects to the outside an image obtained through the RNI recording lens system or a recorded image reproduced by the recording and reproducing circuit. It is characterized by:

[Function] This invention utilizes a liquid crystal viewfinder prepared as an imaging monitor as a liquid crystal projector, and allows a large number of people to simultaneously view recorded video played back by a recording/playback circuit or video currently being shot. Do it like this.

[Examples] Examples of the present invention will be described below with reference to FIGS. 1 to 4. FIG. 1.2 is a schematic diagram showing an embodiment of the camera-integrated video tape recorder of the present invention in different usage modes.

In Figure 1.2, camera-integrated videotape recorder 21
The liquid crystal viewfinder 9 is arranged close to the imaging lens system 2, and a prism 22 that rotates within a range of about 90 degrees is used as an optical path switching means for guiding the light transmitted through the liquid crystal panel 11 to the imaging lens system 2. It is movably provided between the finder 9 and the imaging lens system 2. That is,
When photographing a subject, the prism 22 is connected to the liquid crystal panel it in the liquid crystal viewfinder 9, as shown in FIG.
It is incorporated in the optical path that connects the eyepiece lens 14 at right angles to the eyepiece lens 14, and enables recording monitoring using the liquid crystal viewfinder 9. On the other hand, when viewing a reproduced video, as shown in FIG. By reflecting the light and projecting it outside through the imaging lens system 2 through a path opposite to that used during imaging, it is possible to monitor the playback by a large number of people.

In the case of the embodiment, a prism 22 as an optical path switching means
is rotated in response to a command from the system control circuit 15 and click-locked at a predetermined position, so that the optical axis does not shift when monitoring recording or monitoring playback.

Furthermore, during playback monitoring, in order to ensure the brightness of the externally projected image, the output of the light source 12 is multiplied by a command from the system control circuit 15 compared to when recording is monitored. Since light does not leak into the eyepiece 14 side of the LCD viewfinder 9, even if you unknowingly look into the LCD viewfinder 9, strong light may be directly received by the eyepiece 14 and damage the retina or the eyepiece. It does not cause any damage to the optic nerve.

In addition, the camera-integrated video tape recorder 21 is designed to be simple in the recording/playback circuit 5 in consideration of the simultaneous viewing of the playback video by a large number of people, and in order to enable everyone to hear the playback audio on the spot. An audio output circuit 23 having an RP amplifier function is connected, and the reproduced audio is amplified through a small speaker 24 added as a vibration part equipment. Therefore, without externally connecting an amplifier, speaker, etc. to the a-voice output terminal 20, a large number of people can simultaneously view the reproduced video with audio using the camera-integrated video tape recorder 21 alone.

In this way, the camera-integrated video tape recorder 2
1, by using the liquid crystal panel 11 in the liquid crystal viewfinder 9 as an image source for the projector and using the imaging lens system 2 as an optical path for the projected image, a projector function can be added very easily. I can do it. Furthermore, since the movable prism 22 may be used as the optical path switching means, a projector function can be added without incurring excessive costs.

Note that in the above embodiment, the optical path switching means is not limited to the prism 22, but may also be configured with a movable light shielding member such as a shutter separately arranged within the liquid crystal viewfinder 9 and the imaging lens system 2, for example.

Further, in the above embodiment, the image pickup lens system 2 is used to project the reproduced image, but as in the camera-integrated video tape recorder 31 shown in FIGS. 11 is movable inward and outward, and when used as a projector, the light source 32 shown in FIG. The light may be projected in the i direction.

In this case, the adapter 34 that includes the light source 32 and the magnifying lens 33 constitutes the projection optical system, and the imaging lens system 2 is not used during projection playback. It is also possible to project the video through the TV 34, so that it can be viewed by a large number of people at the same time not only as a playback monitor but also as a recording monitor.

[Effects of the Invention] As explained above, the present invention operates one stage of optical path switching when the recording/reproducing circuit plays back a recorded video, and the light transmitted through the liquid crystal panel in the liquid crystal viewfinder is transferred to the imaging lens. Since the structure is configured so that the image is guided to the system and projected to the outside through the reverse path to that used during imaging, the LCD panel in the LCD viewfinder is used as an image source for the projector, and the imaging lens system is used as the optical path for the projected image. By using this, a projector function can be added very easily, and as an optical path switching means, a simple optical element such as a movable prism, an imaging lens system, or a movable light-shielding member placed inside the liquid crystal viewfinder can be used. This allows you to add a projector function without incurring excessive costs, and although it cannot in principle be used as a recording monitor for projection playback, it can be used as a playback monitor when playing back recorded video. If you look into the LCD viewfinder by mistake, the optical path to the eyepiece lens of the LCD viewfinder is cut off, which prevents unexpected accidents such as damage to the retina or optic nerve, making it safer. As a projector, it has excellent effects such as being able to be played by many people at the same time.

Furthermore, the present invention has a configuration in which a projection optical system is integrated with the liquid crystal panel of the liquid crystal viewfinder, and images obtained through the imaging lens system or recorded images played back by the recording and playback circuit are projected to the outside. The LCD panel built into the viewfinder can be used not only to monitor recording but also to monitor simultaneous playback by a large number of people, and can be used in combination with a projection optical system to configure a projector, with no need for an imaging lens system. Since no processing is required, it can be used not only as a playback monitor when playing back recorded video, but also as a recording monitor to monitor the video that is currently being recorded, allowing multiple people to watch the video being recorded at the same time, or Telephoto shooting produces excellent effects such as making distant objects look close and allowing many people to view them at the same time.

[Brief explanation of drawings]

Fig. 1.2 is a schematic configuration diagram showing one embodiment of the camera-integrated video tape recorder of this invention in different usage modes, and Figs. fJ43 and 4 show other embodiments of the camera-integrated video tape recorder of this invention FIG. 5 is a schematic diagram showing an example of a camera-integrated video tape recorder using a conventional liquid crystal viewfinder. 209. Imaging lens system, 5. ,,recording/playback circuit 906.
LCD viewfinder, 11. ,,LCD panel, 21,
31. , , camera-integrated videotape recorder, 22.
,, Prism, 32. . , light source, 33. ,,magnifying lens, 34. ,,adapter.

Claims (2)

[Claims] (1) A camera-integrated videotape recorder that records images obtained through an imaging lens system using a recording/reproducing circuit and displays the images on a monitor on a liquid crystal viewfinder, wherein when the recording/reproducing circuit reproduces the recorded images, A camera-integrated video tape recorder comprising an optical path switching means for guiding the light transmitted through the liquid crystal panel in the liquid crystal viewfinder to the imaging lens system and projecting the light to the outside in a reverse path to that during imaging. (2) A camera-integrated videotape recorder that records images obtained through an imaging lens system using a recording/reproducing circuit and displays them on a monitor on a liquid crystal viewfinder, which is integrated into the liquid crystal panel of the liquid crystal viewfinder;
A camera-integrated video tape recorder comprising a projection optical system that projects to the outside an image obtained through the imaging lens system or a recorded image reproduced by the recording and reproducing circuit.