JPH04150174A - Television camera - Google Patents

Abstract

PURPOSE:To eliminate the need for a monitor television receiver for adjusting focus or the like by forming a display means with a 1st display means displaying the entire pattern of image pickup and a 2nd display means magnifying an optional part and displaying the magnified part. CONSTITUTION:An output video signal fed to an output terminal 5 of a camera main body is fed to a video equipment and the entire picked-up pattern of the output video image is monitored by a view finder 6 of a 1st display means A. On the other hand, the output video signal is fed also to a picture magnification circuit 7 simultaneously and the picture signal output magnified by the picture magnification circuit 7 is inputted to a view finder 8 being a component of a 2nd display means B, in which a picture whose middle part is magnified is displayed on the view finder 8 being a component of the 2nd display means B. Thus, a cameraman discriminates a minute change in the focus from the displayed image in details. Thus, it is not required to provide separately a monitor television receiver for this purpose.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a television camera that takes pictures without monitoring images.

[Conventional technology]

An example of a conventional television camera is shown in the block diagram of FIG. 5 and the perspective view of the configuration of the television camera in FIG. 6. In Figures 5 and 6, 1 is the television camera body, 2 is the lens,
Reference numeral 3 denotes an image pickup means constituted by a solid-state image pickup device such as an image pickup tube or a CCD, 4 a signal processing circuit, 5 an output terminal, and 6 a dew finer using a cathode ray tube.

The operation will be explained based on the above configuration. When the reflected light from the object passes through the lens 2 and hits the surface of the imaging means 3, the photoelectric conversion action of the imaging means 3 outputs a current that changes depending on the intensity of the light.

This output current is converted to voltage, and the next signal processing circuit 14 is used.
After amplification, blanking signal addition, and signal processing such as comma 1 positive, the signal is outputted from output terminal 5 as a camera video signal output. On the other hand, the cameraman simultaneously monitors the image with a viewfinder 61 and sets the composition and adjusts the focus.

[Problem to be solved by the invention] A conventional television camera is configured as described above. However, in recent years, the number of scanning lines is 1, which is called high-definition.
An extremely sophisticated television system with 125 lines, a video frequency bandwidth of 30 MHz, and an aspect ratio of 16:9 was developed, and along with this, high-definition television cameras and viewfinders were also developed, which were used to shoot various video sources. It has become. In this case, since the image is a high-definition image or an extremely detailed image as mentioned above, a 5-inch, finch-sized viewfinder integrated with a conventional TV camera is used to help the cameraman detect subtle changes in focus. I couldn't make out anything. Therefore,
A 30-inch monitor TV was installed separately, and an operator other than the cameraman had to use an external remote control to adjust the focus of the camera, which caused problems in operability and mobility.

[Means to solve the problem]

This invention was made in order to solve the problems of the conventional examples as described above, and includes a lens that forms an image of reflected light from an object, and an imaging means that photoelectrically converts the light that is imaged by this lens. , a signal processing circuit that processes the output from the image pickup means into an image signal, an output terminal that sends out the image signal output from the signal processing circuit, and a display means that displays an image using the image signal from the signal processing circuit. In the television camera, the display means includes a first display means having a display function for displaying the entire photographing screen, and a second display means having an enlargement display function for enlarging and displaying an arbitrary part of the photographing screen. In addition, the first display means and the second display means each have a separate display section, and the first display means and the second display means have an image signal switching system. to a single display via a switch,
The above object is attempted to be achieved by adopting a configuration in which the displayed images are switched in two stages.

(Function) The television camera according to the present invention configured as described below-F includes a first display means having a screen display function for displaying the entire screen, and a first display means for enlarging any part within the screen. The first display means and the second display means each have separate display sections, or are connected to each other via an image signal changeover switch. Since the camera is configured so that the image displayed on a single display section can be switched in two stages, the photographer can set the composition of the entire screen to be shot while monitoring it on the first display means, and set it on the second display means. By monitoring the magnified image of any part of the screen, it is possible to make delicate judgments about whether to adjust the focus or not.
Appropriate television photography can be accurately performed by a single cameraman.

〔Example〕

An embodiment of the present invention will be described based on the drawings.

(Configuration) FIG. 1 is a circuit block diagram of a television camera showing an embodiment of the present invention, FIG. 2 is a perspective view of the configuration of the television camera of the above embodiment, and FIG. FIG. 3 is an explanatory diagram of the screen configuration of the camera.

Note that the same or equivalent parts as in the conventional example are represented by the same reference numerals.

In FIGS. 1 and 2, IA is the television camera body, 6 is the display section 1, which is the viewfinder, 7 is an image enlargement circuit configured as a memory, and 8 is the display section.
2, and the signal processing circuit 4 and the viewfinder 6 are the first display means A, and
The image enlargement circuit 7 and the viewfinder 8 constitute a second display means B. As shown in FIG. 2, the knee finders 6 and 8 are installed at an easily visible position above the television camera.

(motion) The operation will be explained below based on the configuration of F.

The operation up to the output of the video signal is the same as in the conventional example, so detailed explanation will be omitted.

In FIG. 1, the output video signal sent to the output terminal 5 of the camera body IA is supplied to the video equipment by a transmission circuit (not shown), and this output video is simultaneously photographed by the viewfinder 6 of the first display means A. The entire screen is being monitored. On the other hand, the output video signal is also sent to the image enlargement circuit 7 at the same time.

This image enlargement circuit 7 is composed of a memory etc.
For example, if you write only the portion with an aspect ratio of 4:3° and 525 scanning lines, which corresponds to the current NTSC television system, as shown in Figure 3, into memory and read it out with the time axis expanded, you can enlarge the central portion. An image signal can be obtained.

The image signal output enlarged by the image enlargement circuit 7 is input to the NTSC viewfinder 8 constituting the second display means B, and an image with the center portion enlarged is displayed on the viewfinder 8. This allows the photographer to accurately discern subtle changes in focus.

Therefore, there is no need to provide a separate monitor TV even when taking extremely precise images such as high-definition shooting, and the cameraman can constantly monitor the screen using the viewfinder 6 and set the composition of the screen.
It is possible to discern subtle changes in the focus from the enlarged image of the viewfinder 8 and perform appropriate television shooting at the right time.

Next, another embodiment will be described based on the circuit block diagram of a television camera shown in FIG.

In the drawings, parts that are the same as or corresponding to those in the embodiment described above are indicated by the same reference numerals.

In FIG. 4, 6A is a viewfinder which is a display unit v3, and 9 is an image signal changeover switch (hereinafter referred to as ), and the signal processing circuit 4, the changeover switch 9, and the viewfinder 6A are used as the first display means A, and the image enlargement circuit 7, the changeover switch 9, and the viewfinder 6A are used as the second display means A. Display means B is also configured.

The operation will be explained based on the above configuration.

First, the image enlargement circuit 7 writes an arbitrary part of the high-definition image into a memory, and performs time axis expansion and scanning line interpolation processing to obtain an enlarged image with 1125 scanning lines. Then, the image signal is switched to the video signal for the entire screen using the changeover switch 9, and the enlarged image signal is sent to the viewfinder 6A.

By switching between the standard image signal and the enlarged image signal using the changeover switch 9, you can monitor the entire shooting screen with the viewfinder 6A and set the composition of the screen, and also switch to the enlarged image and perform focusing etc. Subtle discrimination can be performed precisely, and the same effects as in the embodiments described above can be achieved.

It should be noted that the present invention is not limited to the above-described embodiments, and can be applied to high-definition images by an appropriate method, such as switching the vertical and horizontal deflection voltages of the viewfinder to voltages that are more than twice as high to create an extreme overscan state. If an arbitrary part is enlarged and displayed, the same effect as the above embodiment can be obtained.

Note that the imaging means is not particularly limited to an imaging tube such as a Sachicon, or a solid-state imaging device such as a CCD.

〔Effect of the invention〕

As explained above, according to the present invention, the display means of the television camera includes the first display means having a display function for displaying the entire screen to be photographed, and the enlargement means for enlarging and displaying any part of the screen. and a second display means having a display function, and the first display means and the second display means each have separate display sections, or a single display is provided via an image signal changeover switch. Since the structure is configured so that the image displayed on the screen can be switched in two stages, the entire shooting screen can be monitored using the first display means and the appropriate screen settings can be made. By monitoring the enlarged image using the second display means, subtle changes in focus can be precisely determined, and the focus can be adjusted appropriately without the need for a separate monitor TV with a large screen size for focus adjustment. High-definition video can be accurately photographed by a single cameraman with excellent operability and mobility.As a result, the performance of the television camera can be improved and a television camera for high-definition photography can be obtained at a reduced cost.

[Brief explanation of drawings]

FIG. 1 is a circuit block diagram of the main parts of a television camera showing one embodiment of the present invention, FIG. 2 is a perspective view of the external configuration of the television camera of the above embodiment, and FIG. 3 is a circuit diagram of the television camera of the above embodiment. 4 is a block diagram of the main circuit of a TV camera showing another embodiment of the present invention, FIG. 5 is a block diagram of the main circuit of a conventional TV camera, and FIG. The following is a perspective view of the exterior configuration of an example television camera. 1. IA-...TV camera body 6.6A, 8.
... Viewfinder interface ... Image enlargement circuit 9 ... Image signal changeover switch A ... First display means B ... Second Display means V,, V3, V, 3, . . . display section In the drawings, the same or corresponding parts are indicated by the same reference numerals.

Claims (3)

[Claims] (1) A lens that forms an image of reflected light from a subject, an imaging means that photoelectrically converts the light imaged by this lens, a signal processing circuit that processes the output from this imaging means into an image signal, and this signal processing A television camera comprising an output terminal for transmitting an image signal output from a circuit, and a display means for displaying an image based on the image signal from the signal processing circuit, wherein the display means has a display function for displaying the entire shooting screen. A television camera comprising a first display means and a second display means having an enlarged display function for enlarging and displaying an arbitrary part of the photographic screen. (2) The television camera according to claim 1, wherein the first display means and the second display means each include an individual display section. (3) Claim 1, characterized in that the first display means and the second display means are configured so that the images to be displayed are switched in two stages on a single display unit via an image signal changeover switch.
The television camera mentioned.