JPH0564509B2 - - 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.

BACKGROUND TECHNOLOGY In recent years, with the spread of portable VTRs, there have been many opportunities to take pictures with video cameras, and in particular, there has been an increase in the number of outdoor pictures taken using batteries.

A conventional photographing device will be described below with reference to the drawings. FIG. 2 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 video camera body 1, and an image taken by the photographing lens 2 is formed on an image pickup tube 3. do. The signal from the image pickup tube 3 is supplied to the signal processing circuit 4, where it can be converted into a predetermined video signal.
The signal is supplied to a video output terminal 6 for recording onto a VTR (not shown). Therefore, the user can take a picture while checking the image on the electronic viewfinder 5.

This method is used in most video cameras currently on the market.

Problems to be solved by the invention However, in the above configuration,
Even when the camcorder is not moving, such as when the camcorder is mounted on a tripod, images are displayed on the electronic viewfinder, which wastes power. In such cases, the battery life is shortened.

Means for Solving the Problems In order to solve the above problems, the photographing apparatus 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 photoelectric conversion means for converting an optical image from the photographing lens into an electrical signal. an electronic viewfinder for checking an image using an electrical signal converted by the converting means; a detecting means for detecting that the camera body including the photographing lens and the photoelectric converting means is attached to a fixing means such as a tripod; When it is detected that the camera body is attached to the fixing means by the means, a normal operation of supplying a predetermined voltage to each part of the electronic viewfinder and a disconnection of cutting off the voltage supplied to at least a part of the electronic viewfinder. and a control means for controlling the operation to be repeated at a predetermined period.

Effects The present invention provides a photographing device having the above-mentioned configuration, which does not continuously supply power to the viewfinder as in the past, thereby reducing power consumption and extending battery life. It is.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows a block diagram of the main parts of a photographing device according to an embodiment of the present invention. In Figure 1,
A photographic lens 12 for photographing a subject is provided at the front of the video camera body 11, and the image of the subject photographed by the photographic lens 12 is transferred to an imaging tube 13.
The image is formed on the imaging surface 13a. The image pickup tube 13 converts the formed optical image into an electrical signal, and the signal processing circuit 14 converts the formed optical image into an electrical signal.
Amplifies and processes up to a predetermined video signal. The video signal processed by the signal processing circuit 14 is sent to an electronic viewfinder 1 built in the rear of the video camera body 11 and using a small cathode ray tube.
5 and a video output terminal 17 for connection to a portable VTR 16.

A hand grip 18 provided at the bottom of the video camera body 11 is provided with a tripod connecting screw 19. When a tripod is attached to the tripod mounting screw 19, a tripod detection switch 20 is turned on, and a control circuit 21
It is configured to transmit signals to.

The control circuit 21 controls the power supplied to the electronic viewfinder 15, and normally supplies a predetermined voltage to each part of the electronic viewfinder 15, and during control, the electronic viewfinder 15
The cutting operation of applying a lower voltage than normal only to the cathode ray tube heater section (not shown) and cutting off the voltage supplied to all other sections, and the normal operation of supplying a predetermined voltage to each section are repeated at a predetermined cycle. be able to. Also connected to the control circuit 21 is a switch 22 that can be manually controlled regardless of the detection switch 20.

The operation of the photographing apparatus of this embodiment configured as described above will be described below. First, when the user is hand-held, the tripod detection switch 2
0 is off, a predetermined voltage is supplied to each part of the electronic viewfinder 15 by the control circuit 21, and the electronic viewfinder 15 operates normally. The image of the subject photographed by the photographing lens 12 is converted into a predetermined video signal by the image pickup tube 13 and the signal processing circuit 14, and this image can be confirmed by the electronic viewfinder 15.

Next, when using the video camera body 11 fixed on a tripod or the like, the tripod is attached to the tripod mounting screw 19 provided on the hand grip 18, the tripod detection switch 20 detects this, and the control circuit 21 controls the electronic viewfinder 15. By cutting off the power supplied to the device at predetermined intervals, the power consumption of the power source can be reduced. At this time, since a low voltage is supplied to the cathode ray tube heater section, an image can be displayed immediately when power is supplied.

It is also possible to manually turn on and off the image on the electronic viewfinder 15 by using the manual control switch 22. Therefore, when the video camera is fixed on a tripod, etc., there is no need to constantly look at the screen of the electronic viewfinder, so there is no major problem in using it even if the power supply to the electronic viewfinder is cut off at predetermined intervals. , power consumption can be reduced.

Effects of the Invention As described above, the present invention includes 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 an image generated by the electric signal converted by the photoelectric conversion means. an electronic viewfinder for confirming that the camera body including the photographing lens and the photoelectric conversion means is mounted on a tripod; , a control means for controlling the normal operation of supplying a predetermined voltage to each part of the electronic viewfinder and the cutting operation of cutting off the voltage supplied to at least a portion of the electronic viewfinder at a predetermined cycle; The effect is that power can be saved and battery life can be extended.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of main parts of a photographing apparatus according to an embodiment of the present invention, and FIG. 2 is a block diagram of main parts of a conventional photographing apparatus. 12... Photographing lens, 13... Image pickup tube, 15...
. . . Electronic viewfinder, 20 . . . Tripod detection switch, 21 . . . 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; an electronic view finder for confirming an image using the electric signal converted by the photoelectric conversion means; a detection means for detecting that a camera body including a photographic lens and a photoelectric conversion means is attached to a fixing means such as a tripod; and when the detection means detects that the camera body is attached to the fixing means, A cutting operation that applies a lower voltage than normal to only one part of the electronic viewfinder and cuts off all voltage supplied to other parts;
A photographing apparatus comprising: a control means for controlling a normal operation of supplying a predetermined voltage to each part of the electronic viewfinder to be repeated at a predetermined cycle.