JPH0535650Y2 - - Google Patents

Description

[Detailed Description of the Invention] (a) Field of Industrial Application The present invention relates to a video camera, particularly a video camera equipped with a function to prevent erroneous operation of various operation switches.

(b) Conventional technology Modern video cameras are equipped with various features such as a fade mechanism, title insert, and date ON/OFF, and many of these functions must be executed during the shooting operation. It is becoming. By the way, in order to execute these functions, it is necessary to operate the operation switch located on the camera body, but normally, during shooting operation, the user is looking at the viewfinder and has to perform multiple operations. In order to select and operate a desired switch, it is necessary to take one's eyes off the viewfinder and check the viewfinder, and while the user takes his eyes off the viewfinder, inconveniences occur such as the image pickup screen tilting or shaking.

Therefore, Japanese Patent Application Laid-open No. 61-224671 (H04N5/
225) proposes a technique for operating a control switch without taking your eyes off the viewfinder. In the conventional technology, each of a plurality of operation switches is provided with a contact detection section, and when the photographer touches one of the switches immediately before operation, the function of the corresponding switch is displayed in the viewfinder, and the desired function is displayed in the viewfinder. Check whether the switch is on or not.
It is configured to operate.

(c) Problems to be solved by the invention The above-mentioned conventional technology is excellent in that the function can be checked on the viewfinder immediately before operating the operation switch, but when operating multiple operation switches in succession, If these operation switches are touched in advance, the above-mentioned confirmation operation becomes difficult.
For example, if you want to display the title and date continuously, set the title insert switch to 1.
While operating the date display switch with one finger, if you touch the date display switch with another finger and wait, two function displays will be displayed on the viewfinder, and you will not be able to operate either of the operation switches. You will not be able to check whether it is working or not. Therefore, a plurality of operation switches must be sequentially operated with one finger, and continuous operation is impossible.

(d) Means for Solving the Problems The present invention is a video camera, which enters the first operation state by a pressing operation and issues a first command, and when further pressing force is applied after outputting the first command, the second operation occurs. a plurality of two-stage operating switches that issue a second command when the operating switch is in a state; a display control circuit that displays the contents of the operating mode corresponding to the operating switch on an electronic viewfinder when the first command is input; The device is characterized by comprising a system control circuit that shifts the main body of the device to the operation mode when a command is input.

(e) Effect Since the present invention is constructed as described above, even if multiple operation switches are touched and maintained in the standby state, the display will be displayed on the viewfinder unless the switch is pressed to the first operation state. Instead, only the function of the operation switch that you wish to confirm is always displayed.

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

Figure 1 shows a video camera with an integrated VTR.
In FIG. 1, 1 is a light receiving lens, 2 is an image sensor that converts an image formed through the light receiving lens 1 into an image signal, and 3 is a camera signal processing circuit including a well-known color separation circuit, a color encoder, etc. can be,
Creates and outputs an NTSC video signal from the image signal.

4 has a recording circuit that records the video signal output from the camera signal processing circuit 3 on a magnetic tape.
This is a VTR signal processing circuit, and the video signal to be recorded is also output to the video output terminal 5.
A part of it is displayed on the electronic viewfinder 7 via the character mixing circuit 6.

A system control circuit 9 issues various operation mode command signals to a servo circuit 8 and a VTR signal processing circuit 4, which are well known in VTRs, such as a capstan drive circuit and a reel drive circuit.

10a, 10b, and 10c are operation switches arranged on the side of the video camera 11 as shown in FIG. 2. For example, 10a is a date ON/OFF switch, 10b is a title insert switch,
10c functions as a VISS recording switch.

Each of these operation switches is a so-called two-stage switch, and as shown in FIG.
When it reaches the position indicated by , it is temporarily locked and the first
It becomes operational and the first command signal is sent to the function display circuit 13.
Output to. In this state, when the push knob 12 is further pushed in the direction of the arrow to the position indicated by the chain line j, the second operating state is entered and a second command signal is output to the system control circuit 9.

The function display circuit 13 has a memory storing character data indicating the function of each operation switch, and upon receiving the first command signal, the character signal of the character data corresponding to the operation switch is sent to the character mixing circuit. 6 and is superimposed on the video signal and displayed on the electronic viewfinder 7.

Next, the operation when operating the operation switch will be explained.

By turning on the REC button (not shown), the system control circuit 9 issues a recording command to the servo circuit 8, giving each drive mechanism a servo suitable for recording, and the VTR signal processing circuit 4 records the video signal being shot. do. It should be noted that the photographer is looking at the screen of the viewfinder 7 during this recording.

When attempting to insert the date into the recording screen, the user presses one of the operation switches without taking his eyes off the viewfinder 7 until it reaches the first operation state. This pressed switch is an operation switch 10a that is a date ON/OFF switch.
If so, the character data of "date" is inserted into the character mixing circuit 6 by the first command signal, and the characters "date" are displayed on the video screen at the lower left corner of the screen of the viewfinder 7 as shown in FIG. 4a. The photographer can set the date based on this display.
Confirm that it is the ON/OFF switch, and then press this switch firmly to set it to the second operating state.
The command signal is input to the system control circuit 9, and the system control circuit 9 sets the VTR signal processing circuit 4 to date insert mode.

In this date insert mode, the recording operation continues, but a character signal corresponding to the current date from the timer circuit (not shown) is mixed with the video signal input to the recording circuit, and the date is also added to the video signal. It will be recorded. Furthermore, the first
By pressing the operation switch further from the operating state to release the first operating state, input of the first command signal to the function display circuit 13 is stopped.
The input of character data to the character mixing circuit 6 is also stopped. Therefore, the display on the viewfinder 7 in the date insert mode is as shown in FIG. 4b.

Also, the pressed operation switch will turn on/off the date.
If the operation switch 10b is not an OFF switch but a title insert switch, the display on the viewfinder 7 will be as shown in Figure 4c when it enters the first operation state, and the photographer can You can confirm that it is not a date ON/OFF switch. After confirming this, the photographer should adjust the operating switch 10b to such an extent that it will never reach the second operating state.
By slightly pressing the button to release the first operating state, and then stopping the pressure after releasing the button, the operating switch 1
0b returns to the initial state, and the function display as shown in FIG. 4c also disappears. After this, the photographer can set the date by performing the same operation as above on other operation switches.
You can find the ON/OFF switch.

By the way, each operation switch 10a, 10b, 1
If separate fingers are brought into contact with 0c to set it in a standby state and a pressing operation is performed with each finger, the switch can be pressed continuously.

In this embodiment, in the title insert mode executed by the operation switch 10b, which is a title insert switch, the character signal corresponding to the title recorded in advance in the memory is mixed instead of the character signal corresponding to the above-mentioned date. mode and is executed by the operation switch 10c, which is the VISS recording switch.
The VISS recording mode corresponds to a mode in which the duty of the control signal recorded by the control head for servo is changed from 50% and used as an index for cueing. It goes without saying that the operation switch can also be used for functions such as fading, strobe photography, shutter speed designation, etc. in addition to these functions.

(g) Effects of the invention As described above, according to the invention, it is possible to easily check the function of the operation switch when operating the operation switch by groping while looking at the shooting screen with the viewfinder, and, In order to confirm, it is essential to make an active action to press the button to the first operation state, and instead of displaying the display just by touching the finger as in the conventional case, it is possible to display multiple functions upon contact. It is possible to prevent this and enable continuous operation of the operation switch, which has high practical value.

[Brief explanation of the drawing]

The drawings all relate to one embodiment of the present invention; Fig. 1 shows a circuit block of a video camera, Fig. 2 shows a side view of the same, Fig. 3 shows an explanation of the operation of an operation switch, and Fig. 4 shows a screen on a viewfinder. FIG. 7...Electronic view finder, 10a, 10
b, 10c...operation switch, 13...function display circuit, 9...system control circuit.

Claims (1)

[Claims for Utility Model Registration] An electronic viewfinder that displays a photographic screen; and a first operation state that is activated by a pressing operation and a first command issued; and when further pressing force is applied after the first command is output, a plurality of two-stage operation switches that are in a two-operation state and issue a second command; and a display circuit that displays the contents of the operation mode corresponding to the operation switch on the electronic viewfinder when the first command is input. , and a system control circuit that shifts the device body to the operation mode when the second command is input.