JPH0423873B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a video camera that can be used in combination with a portable video tape recorder (VTR) or the like.

Conventional configurations and their problems In recent years, with the spread of portable VTRs, there are many opportunities to take pictures with video cameras, and in particular, there is an increase in the number of outdoor shots using batteries.

A conventional photographing device will be described below with reference to the drawings. FIG. 1 is a diagram showing the main parts of a conventional photographing device. A photographing lens 2 for photographing a subject is fixed to the front of a main body 1, and an image formed by the photographing lens 2 is formed on an imaging tube 3. The signal from the image pickup tube 3 is supplied to the signal processing circuit 4.
can be converted into a predetermined video signal by
This video signal is supplied to an electronic viewfinder 5 for checking the captured image and a video output terminal 6 for recording onto a portable VTR (not shown). Therefore, the user can take a picture while checking the image on the electronic viewfinder 5.

However, in the above configuration,
Since current is constantly supplied to the electronic viewfinder, there is a problem in that the battery life is shortened, especially when a video camera is operated using battery power.

OBJECTS OF THE INVENTION An object of the present invention is to provide a photographing device that can reduce power consumption and extend battery life.

Structure of the Invention The photographing device of the present invention includes a photographing lens for photographing a subject, a photoelectric conversion means for converting an optical image from the photographing lens into an electrical signal, and a predetermined electric signal for converting the electric signal converted by the photoelectric conversion means. a signal processing circuit for processing into a video signal; a pause means for temporarily stopping a recording operation of a recording device for recording the electric signal converted by the photoelectric conversion means; and an electric signal converted by the photoelectric conversion means. an electronic viewfinder for checking the video image, and a current control means for intermittent at least part of the current supplied to the electronic viewfinder at a predetermined cycle while the recording operation is paused by the pause means. This configuration reduces power consumption.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 2 shows a configuration diagram of the main parts of a photographing device according to an embodiment of the present invention. In FIG. 2, a photographing lens 12 for photographing a subject is provided at the front of a video camera body 11.
The image of the subject photographed by the camera 2 is formed on the camera tube 13a of the camera tube 13. The image pickup tube 13 converts the formed optical image into an electrical signal, and the signal processing circuit 14 amplifies the electrical signal to a predetermined video signal. The video signal processed by the signal processing circuit 14 is
It is built into the rear part of the video camera body 11, and is supplied to an electronic view finder 15 using a small cathode ray tube and a video output terminal 17 for connection to a portable VTR 16. A temporary stop switch 19 is provided on the hand grip 18 at the bottom of the video camera body 11, and is connected to a connection terminal 20 for controlling tape running of the portable VTR 16 and an oscillation circuit 21. The oscillation circuit 21 has a temporary stop switch 19
While the tape running of the VTR 16 is temporarily stopped, the signal whose output voltage changes every 1 field (approximately 1/60 seconds) of the video signal is controlled by current, as shown in the output waveform diagram in Figure 3. It is supplied to the circuit 22. The current control circuit 22 controls the current that drives the electronic viewfinder 15, and the oscillation circuit 2
Electronic viewfinder 1 according to the oscillation period of 1
The circuit is configured to intermittent the current supplied to the circuits other than the heater section of the small cathode ray tube No. 5. Further, a manual switch 23 is connected to the current control circuit 22, and by switching this manual switch 23, the electronic viewfinder 15 can be controlled at all times.
It is also possible to supply current to

The operation of the photographing apparatus of this embodiment configured as described above will be described below. First, during normal shooting, current is supplied to the electronic viewfinder 15 by the current control circuit 22, and the subject can be photographed through the photographing lens 12 while checking the image on the electronic viewfinder 15. When the VTR 16 is in a recordable state, by turning on and off the pause switch 19, the portable recorder is connected via the connection terminal 20.
It is possible to control the tape running of the VTR 16 and record only the necessary images on the magnetic tape.

Next, a case will be described in which the recording operation of the portable VTR 16 is temporarily stopped by the pause switch 19. At the point when the pause starts, the oscillation circuit 21 starts oscillating with a waveform as shown in FIG. The image displayed on the finder 15 is interrupted every 1 field (approximately 1/60 second) of the video signal. Therefore, the power supplied to the electronic viewfinder 15 during the pause period is reduced to approximately 1/2, so that power battery consumption can be reduced. Note that although the above embodiments have been explained with reference to the case where the current is intermittent for each field, the current is not limited to one field, and the same effect can be obtained even if the current is interrupted for one frame or any time. be.

Effects of the Invention As is clear from the above description, the present invention provides a photographic lens for photographing a subject, a photoelectric conversion means for converting an optical image from the photographic lens into an electrical signal, and a signal that is converted by the photoelectric conversion means. a signal processing circuit for processing the electrical signal converted by the photoelectric conversion means into a predetermined video signal; a pause means for temporarily stopping a recording operation of a recording device for recording the electric signal converted by the photoelectric conversion means; an electronic viewfinder that confirms the image using the converted electrical signal; and at least a portion of the current supplied to the electronic viewfinder at a predetermined cycle while the recording operation is temporarily stopped by the pause means. Since it is configured to include an intermittent current control means, it is possible to reduce the power consumed by the electronic viewfinder during the pause period, increasing the time that can actually be recorded on the recording device with one battery. be able to. Additionally, since the image displayed on the electronic viewfinder is intermittent during the pause period, it is possible to clearly identify whether recording is in progress or paused, which also has the effect of preventing recording errors. It is something.

[Brief explanation of drawings]

FIG. 1 is a block diagram of main parts of a conventional photographing apparatus, FIG. 2 is a block diagram of main parts of a photographing apparatus according to an embodiment of the present invention, and FIG. 3 is an output waveform diagram. 12... Photographing lens, 13... Image pickup tube, 14...
...Signal processing circuit, 15...Electronic viewfinder, 19...Pause switch, 22...Current control circuit.

Claims (1)

[Claims] 1. A photographic lens for photographing a subject, a photoelectric conversion means for converting an optical image from the photographic lens into an electrical signal, and a signal processing circuit for processing the electric signal converted by the photoelectric conversion means into a predetermined video signal. and a pause means for temporarily stopping the recording operation of a recording device that records the electrical signal converted by the photoelectric conversion means, and an electronic viewer for checking an image using the electrical signal converted by the photoelectric conversion means. A photographing device comprising: a view finder; and a current control means for intermittent at least part of the current supplied to the electronic view finder at a predetermined cycle while the recording operation is temporarily stopped by the temporary stop means.