JPS62206970A - Photographing mode changing-over device for video camera - Google Patents

Abstract

PURPOSE:To save a space and to improve an operability by using one picture recording control switch, executing the frame photographing by turning the switch on in a moment and executing the continuous photographing by continuing to turn the switch on. CONSTITUTION:At the time of a frame photographing mode, when a picture recording control switch SW is turned on for a T0 time, the electric potential of the E terminal of a picture recording control circuit REC comes to be from a high H to a low L for the T0 time only, and the REC starts to travel a tape by the fall signal. Simultaneously, a rise signal is supplied to an input terminal B1 of a changing-over signal generating circuit CSO. An IC1 of the CSO receives the input, generates an H output of the time width of a T1, and by receiving this input, an IC2 generates the H output of the time when of a T2. A transistor TR receives the input, decreases the electric potential of an E terminal and the REC stops the traveling of a tape by the fall signal. When an SW continues to turn on at the time of a continuous photographing mode, the REC starts the traveling of the tape by the fall signal at the time of ON. Even when the SW is turned off after a T1 time passes, photographing is continued, and next, by the fall signal generated when the SW is turned on, the tape is stopped.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a video camera shooting mode switching device that switches between a continuous shooting mode and a time-lapse mode of a video camera with a single operation switch.

``Prior Art'' In conventional video cameras, switching between rapid succession and time-lapse shooting modes was performed using respective operation switches.

``Problems to be Solved by the Invention'' However, as video cameras have become integrated with imaging and recording functions, have become smaller and lighter, and have become more popular with the masses, using two operation switches has taken up less space. It is also unfavorable in terms of operability.

``Means for Solving the Problems'' Therefore, the present invention is designed to start recording in response to a displacement such as a fall in the input potential, and stop recording in response to a displacement such as the next fall in the input potential. A recording control circuit that controls the recording operation of a video camera, a recording control switch that is connected to the input terminal of this recording control circuit and generates a potential change such as falling every time it is turned on and off, and a circuit that is parallel to this recording control switch. The output circuit is controlled on and off by the change in the input potential of the switching transistor, etc., and the recording execution signal of the recording control circuit is inputted, and a switching signal is generated to the switch circuit after a specified time from the time of this input. Provided is a video camera shooting mode switching device comprising a switching signal generation circuit.

"Function" According to the device according to the present invention, one recording control switch is used, and when in the time-lapse mode, the switch is turned on momentarily to perform time-lapse recording, and when in the continuous shooting mode, the switch is turned on. Continuous shooting will be executed by continuing to do so.

"Example" The present invention will be explained in detail below using the figures.

Fig. 1 is a circuit diagram showing an embodiment of the present invention, Fig. 2(a)
, (b) and (c) are explanatory diagrams of the operation. 1st
In the figure, the recording control circuits H and E C are generally composed of a CPU, etc., and the input potential of the input terminal E varies from high H to low L.
Each time the signal falls, control outputs for starting and stopping recording are sequentially sent from the output terminal to a recording mechanism (not shown), and in conjunction with the generation of the recording start signal, a rising signal as a recording execution signal is generated at the F terminal. .

SW is a recording control switch that is normally opened and closed manually, and in the OFF state, a high level H is applied to the E terminal of the recording control circuit REC, and in the ON state, a low level L is applied. T
R is a transistor, and the input to the pace causes a switch.
It acts as an antenna element.

The switching signal generation circuit C8O is connected to the recording control circuit 1 (F of the EC).
A rising signal is input from the terminal, and after a specified time from the time of input, the transferer TR-g is turned on for a certain period of time. Among these, IC1 and IC2 are C-MOS logic ICs, and IC is B, C after the rising signal is input to the terminal.
Square wave output with width of specified time T1 determined by 1R? :Q1
IC2 outputs a square wave with a width of T2 determined by C2 after the fall signal is input to the B2 terminal from the vQz terminal, and outputs it from the transistor TF+ and the current output from the transistor TF+.

Next, the operation of the circuit shown in FIG. 1 will be explained with reference to FIG. 2. First, to explain the operation of the videotape indicated by TAPE with reference to FIG. It stops at position , is rewound to S,', travels to W, stops, and waits at this position. Next, when a time-lapse command signal is input, the tape starts running from the Wl position and stops at the B2 position.
After being rewound to position 2, it travels to position W2, stops, and waits. During this operation, what has already been recorded is maintained as it is between the rewinding section S, -8I' and the running section S1'Rr, but the erasure and recording functions are activated in the section from R8 to B2. Therefore, in the 1%, -R,' section, the already recorded signal is erased and a new image is recorded, and in the R,'-82 section, a new image is recorded when a new tape is used, and when a pre-recorded tape is used. The existing recording will be erased and a new recording will be made.Furthermore, when the next time-lapse command signal is input, the tape starts running from the W2 position and moves to the B3 position in the same way as explained above. stop,
After being rewound to the S and 'positions, it travels to the W3 position, stops, and waits. and R2-'8. The section has been newly recorded, so in the previous time-lapse tape, R1-R
,,' will ultimately remain as the time-lapse recording portion. Similar operations are repeated as long as the time-lapse mode continues. Next, when switching from the time-lapse mode to the normal continuous shooting mode, the tape starts traveling from the standby position of W3 upon input of a continuous shooting command signal, and shooting continues until a stop signal is input. The mode conversion from continuous to time-lapse mode is as explained at the beginning, and the repetition of continuous mode is also clearly understood from the above explanation. Therefore, it is clear that the double-lined portion in FIG. 2(a) is the recorded portion that is left as a record.

Next, a description will be given of how the above-described recording operation is executed by the circuit of the embodiment shown in FIG. First, Figure 1 and Figure 2 (a), (b) ′? : Explain the stop-motion mode used. The recording control switch SW is set to T due to manual operation, etc. When the switch is closed for a period of time (usually about 1 second or less), the potential supplied from the SW to the recording control circuit RECI7)E terminal becomes T as shown as SW in FIG. 2(b).

Only time... from high to low LK. Recording control circuit RF
C moves to the standby position W in FIG. 2(a) due to this falling signal.
The output for running the videotape from 1 to [EC
At the same time, in synchronization with this output, a rising signal is sent out from the output terminal and supplied to the input terminal B1 of the switching signal generation circuit C8O. The IC of C8O receives this input and moves from the Q1 terminal to the time width rl T as shown by Ql in FIG. 2(b).
Generates an H output (usually several seconds or less) and supplies it to the 82 input terminal of IC2. Upon receiving this input, IC2 outputs output terminal Q2.
2, generates an H output with a time width of T2 shown in Q2 in FIG. (Lower the potential of the E input terminal of gC and input the strike signal.

The RFC stops the running of the tape upon input of this falling signal, which corresponds to position 82 in FIG. 2(a).

REC continues to be connected to the second recording mechanism (not shown) from the D terminal.
The tape is rewound from 82 to W2 in Figure (a), the running output is sent out, and the frame-by-frame shooting is completed.

Here, the input/output functions of the E terminal and D terminal of the I-L EC are well known, and the mechanism itself for generating the output function of the F terminal is obvious, so a description thereof will be omitted.

In the following time-lapse mode, similar operations are performed.

Next, the continuous shooting mode will be explained using FIG. 1 and FIGS. 2(a) and 2(C)'&. If the recording control switch 4 is kept closed by manual operation during the shooting time, the second
The falling signal shown at SW in FIG. 2(C) causes the REC to start tape running from the position W3 in FIG. 2(a). Similarly to the time-lapse mode, even if the transistor Tf (,) is turned on by the rising signal of q in FIG. The tape continues to run, and after T1 time has elapsed, shooting continues even if the SW is turned off, and then the tape is stopped and rewound by the falling signal generated when the SW is turned on, and then moved to the next standby position. to stop the operation.

In addition to the embodiments described above, the switching transistor TR and the switching signal generation circuit can also be integrated and included in the recording control circuit composed of the CPU, and in this case, the switching transistor TR and the switching signal generation circuit can be integrated into an IC instead of the CR time setting circuit. It is also possible to use an IC time generation circuit. Also, the recording control switch SW
It can also be configured with an i-semiconductor switch. It is also clear that in the time-lapse mode in the above description, the number of frames or fields remaining as a record can be set to an arbitrary length of one or more.

"Effects of the Invention" According to the present invention, it is possible to convert the mode between continuous shooting and time-lapse shooting of a video camera with a simple configuration.

[Brief explanation of drawings]

Fig. 1 is a circuit diagram showing an embodiment of the present invention, Fig. 2(a)
, (b) and (c) are explanatory diagrams of the operation. RFC: Recording control circuit, SW: Recording control switch, TR: Transistor, C8O: Switching signal generation circuit.

Claims (1)

[Claims] A recording control circuit that controls the recording operation of the video camera in response to a change in input potential; a recording control switch that is connected to the input terminal of this recording control circuit and provides a change in input potential; and a record control switch that is connected in parallel to this recording control switch. and a switch circuit whose output circuit is controlled to open and close according to the displacement of the input potential, and a recording execution signal related to the recording execution of the recording control circuit are input, and a switching signal to the switch circuit is generated after a predetermined time from the time of this input. It consists of a switching signal generation circuit,
A shooting mode switching device for a video camera, characterized in that time-lapse shooting is executed by instantaneously switching the recording control switch, and continuous shooting is executed by switching and holding the recording control switch for a period longer than the specified time.