JPH03291066A - Video camera - Google Patents

Abstract

PURPOSE:To attain immediate pickup after replacement of a battery through the use of preceding control data by writing the various set control data such as white balance, focusing and shutter speed into a memory and devising the memory content to be stored for a prescribed period even in the case of power interruption. CONSTITUTION:When absence of power is detected due to replacement of a battery, the camera is set to the power save mode and other auxiliary power supply 9 than a main power supply 8 drives only a clock circuit 52, a memory 53 and a main CPU 5. Then the presence of the power supply is discriminated and when power is interrupted, whether or not a prescribed time (5min) elapses is discriminated and when the time elapses, the memory 53 is reset while being discriminated to be non-use for a long period, then the presence of the power supply is discriminated again and the processing is terminated when the power is present. Thus, various control data such as white balance, focusing and shutter speed are stored in the memory 53 set previously. Thus, the preceding data is used, the pickup is immediately restarted after replacement of battery and excellent pickup is continued.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a video camera configured to be integrated with a VTR, for example.

[Summary of the invention]

The present invention relates to a video camera, and by saving the contents of the memory for a predetermined period when the power supply is stopped, when the power supply is stopped for a short time such as when replacing the battery, the control unit for white balance etc. This ensures that data is not lost.

[Conventional technology]

For example, in a video camera for cattle, it is being considered to electronically control white balance, focusing, shutter speed, etc. using a microcomputer.

[Problem to be solved by the invention]

However, in this case, for example, when taking pictures outdoors using a battery, the battery may run out during the shooting process and the battery must be replaced. In such a case, in conventional devices, when the battery is removed for replacement, the data of the computer etc. is reset at that point, and each control etc. has to be performed again after the battery is replaced. This may seriously impede subsequent photographing, especially if specific control settings are made manually.

On the other hand, it is conceivable to use, for example, a non-volatile memory so that these control data are not erased even if the battery is removed. However, if such a non-volatile memory is used, the previous data will remain even if the video camera is not used for a long period of time, which may lead to operational errors the next time it is used.

This application was made in view of these points, and is intended to enable continuous shooting even after replacing the battery.

[Means to solve the problem]

The present invention provides at least a white balance (signal processing circuit).
14)) control data and focusing (lens system (11))
control data and shutter speed (image sensor (13)) can be set manually or automatically (camera CPU (
15)) In the video camera, each of the above data is written to the memory (53), and the power supply (main power supply
8)) When the supply of power is stopped (power supply detection circuit (51)
This is a video camera characterized in that the contents of the memory are saved for a predetermined period of time (main CPU (5)).

[Effect]

According to this, since the contents of the memory are saved for a predetermined period when the power supply is stopped, it is possible to immediately resume shooting using the previous control data after replacing the battery, which improves shooting quality. I can continue.

〔Example〕

In FIG. 1, (1) is a camera section, and the object (
Image light from a camera (not shown) is collected by a lens system (11) and supplied to an imaging device (CCD) (13) via an aperture (12). The signal formed by this image sensor (13) is supplied to a signal processing circuit (14) to form a predetermined video signal. And for each of these parts, camera C
A control signal is supplied from P U (15), which controls the focusing of the lens system (11), the aperture of the diaphragm (12), the shutter speed (charge accumulation time) of the image sensor (13), and the signal processing circuit (I4). The white balance and other adjustments are made.

Further, (2) is a VTR section, in which a video signal is supplied from the camera section (1) to a recording circuit (21), and is converted into an arbitrary recording signal. This recording signal is the switch (22)
A drum motor (24) drives a rotating drum on which the rotating head (23) is mounted, and records data onto a tape (25) wound around the rotating drum. will be held. Furthermore, this tape (
25) is transferred by a capstan (26), and this capstan (26) is driven by a capstan motor (27). Further, the reproduction signal reproduced by the rotary head (23) is supplied to the reproduction circuit (28) through the switch (22), where it is inversely converted into a predetermined video signal. And for each of these parts, VTR (servo) CPtJ (2
9), the motors (24) and (27) are servo driven according to the set tape speed, and the recording circuit (21) and playback circuit according to the tape speed and recording type are supplied. The characteristics of (28) are adjusted, etc. Further, although not shown, the amount of transport of the tape (25) is also detected.

Furthermore, the video signal formed by this reproduction circuit (28) is taken out to an output terminal (3).

At the same time, the above-mentioned camera CPU (15) and VT
Various control data and the like of the RCPU (29) are supplied to the main CPU (5) via the data bus (4).

On the other hand, in the main CPU (5), predetermined control data etc. are formed from manual setting data etc. from the setting input section (6), and this control data etc. are sent to the CPU via the data bus (4).
In addition to being supplied to the IJ (15), (29), etc., the set contents and the like described above are supplied to the display section (7), and a display according to the contents and the like is performed.

At the same time, in this device, power from the main power supply (8) is supplied to the camera section (1), the VTR section (2), and the main C.
It is supplied to the P U (5), the setting input section (6), the display section (7) and the power supply detection circuit (51), as well as the clock circuit (
The power from the auxiliary power supply (9) used to drive the clock circuit (52), main CPU (5), and the memory (53) that stores the setting data of the main CPU (5), etc. Supplied.

In this device, when taking pictures using the battery as the main power source (8), when the battery runs out and is removed for replacement, the power source detection circuit (51) detects that there is no power source, and the main This detection signal is supplied to CPU (5). This causes the main CPU (5) to perform the operations described below.

That is, Fig. 2 shows a flowchart of the operation when no power is detected, and when no power is detected, a timer is first started in step [1], and the device is put into power save mode in step [2]. . In this mode, the device is driven by an auxiliary power source (9) such as a lithium battery that is provided separately from the main power source (8) such as a battery, and the clock circuit (52), memory (53), and main CPU (5). Only some functions are activated.

Next, in step [3], it is determined whether the power supply is present, and if there is no power supply (NO), the timer is checked in step [4]. Then, in step [5], it is determined whether a predetermined period of time (for example, 5 minutes) has elapsed, and if it has not elapsed (NO), the process returns to step [3]. Also, if the predetermined period has elapsed in step [5] (YES), step [6]
The contents of the memory (53) are reset in step [7].
] is used to determine whether the power supply is present.

If there is no power supply (NO) in step [7], this step [7] is repeated, and if power is present (YES) in step [3] or [7], this operation is finished and the main operation is returned to the routine.

Therefore, in this device, when a power supply is detected due to battery replacement, the device goes into power save mode, and when the power is turned on again within a predetermined period (5 minutes), images are taken according to the control data stored in the memory (53). In addition, when there is no power for a predetermined period or more, it is determined that the device has not been used for a long period of time, and the contents of the memory (53) are reset.

In this way, according to the above-mentioned device, the contents of the memory are saved for a predetermined period when the power supply is stopped, so that after replacing the battery, it is possible to immediately resume shooting using the previous profit data. It is possible to continue to do so well.

Furthermore, according to the above-mentioned device, the contents of the memory are erased when a predetermined period of time has passed after the power supply is stopped, so the previous data is not left behind when the device is not used for a long period of time. The product can be used successfully the next time.

In addition to the above-mentioned white balance, focusing, and shutter speed, the control data stored in the memory (53) includes, in the camera section (1), the aperture of the aperture (12), the gain of the video signal, and contrast, color intensity,
Sharpness, hue, etc. can be considered.

In addition, for the VTR section (2), the transport amount of the tape (25) (tape counter), tape speed, type of recording, etc. can be considered, but this application can also be applied to devices with only a camera section and no VTR section. It is.

〔Effect of the invention〕

According to this invention, since the contents of the memory are saved for a predetermined period when the power supply is stopped, it is possible to immediately resume shooting using the previous control data after replacing the battery. I was able to continue doing well.

[Brief explanation of drawings]

FIG. 1 is a block diagram of an example of a video camera according to the present invention, and FIG. 2 is a flowchart of its operation. (1) is the camera section, (2) is the VTR section, (3) is the output terminal, (4) is the data bus, (5) is the main CPtJ, (
6) is the setting input section, (7) is the display section, (8) is the main power supply,
(9) is an auxiliary power supply, (11) is a lens system, (12) is an aperture, (13) is an image sensor, (14) is a signal processing circuit, (
15) is the camera CPU, (21) is the recording circuit, (22)
is the switch, (23) is the head, (24) is the drum motor, (25) is the tape, (26) is the capstan, (2
7) is the capstan motor, (28) is the regeneration circuit, (2)
9) is the VTRCPU, (51) is the power supply detection circuit, and (52) is the power supply detection circuit.
) is a clock circuit, and (53) is a memory.

Claims (1)

[Claims] A video camera in which at least white balance control data, focusing control data, and shutter speed control data are set manually or automatically, each of the above data being written in a memory. , A video camera characterized in that the contents of the memory are saved for a predetermined period when the power supply is stopped.