JP2867156B2 - Still video camera system - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a still video camera system for magnetically recording a still image on a floppy disk, and more particularly to a still video camera system for recording a film image.

[Conventional technology]

Recently, a still video camera (hereinafter referred to as an SV camera) that records a still image on a floppy disk has been commercialized. FIG. 5 is a block diagram of a conventional SV camera.
The configuration will be described with reference to FIG.

Reference numeral 100 denotes an SV camera, and light rays from an image pass through an optical low-pass filter 101, a shutter 102, a lens 103, an infrared cut filter 104, a color filter 105, and a CCD 106.
The signal is photoelectrically converted, and its output passes through a sample / hold circuit 107, a process circuit 108, and a negative / positive circuit 109, and is input to a modulator / demo insulator circuit 110. 111 is a shutter drive motor, 112 is a CCD drive circuit, 113 is a timing generation circuit, 114 is a recording / reproduction amplifier, 115 is a motor drive circuit, 116 is a system control, 117 is a disk drive interface, 118 is a recording / reproduction head, and 119 is a recording / reproduction head. Floppy disk, 120 is a spindle motor, 121 is a spindle motor drive circuit, 122 is a photometry / dimming circuit, 123 is a strobe, 124 is a strobe interface, 125 is a main interface, 126 is a first switch, and 127 is a second switch. , 128 is a strobe mode switch, 129 is a negative / positive mode terminal, and 130 is a negative / positive switching terminal.

Next, the operation of the SV camera 100 will be described. First, turning on the first switch 126 is performed by the main interface 125.
When the system control 116 (hereinafter, referred to as a syscon) detects through the main interface (hereinafter, referred to as a main I / F), the photometry / light control circuit 122 performs photometry via a strobe interface 124 (hereinafter, referred to as a strobe I / F). Then, the exposure value is determined by performing photometric calculation by the system controller 116. If it is determined that a sufficient exposure amount cannot be obtained, charging of the strobe 123 is started via the strobe I / F 124 to prepare for light emission. When the on of the second switch indicated by 127 is detected by the system controller 116, the system controller 116
Spindle motor 120 for driving floppy disk 119
After it is determined that the rotation of is stable and the recording on the floppy disk 119 is possible, the motor driving circuit 115 and the shutter driving motor 1 are driven in accordance with the determined exposure value.
The shutter 102 is driven via 11 to expose the CCD 106. A flash mode switch 128 enables flash light emission.

After the exposure, reading is performed by the CCD drive circuit 112 in accordance with the timing of the timing generation circuit 113, and the sample / hold circuit 107 (hereinafter referred to as S / H), the process circuit 108, the negative / positive circuit 109, the modulator / demodulator circuit A video signal is recorded on a floppy disk 119 via a recording / reproducing head 118 via a recording / reproducing amplifier 114 via a recording / reproducing amplifier 114 (hereinafter referred to as MOD / DEMOD).

A system is known in which the above-described SV camera 100 is connected to a negative-positive adapter, and negative and positive films are recorded on a floppy disk.

FIG. 6 is a block diagram of a negative-positive adapter, and the configuration and operation of the negative-positive adapter 200 will be described with reference to FIG. Reference numeral 201 denotes a negative / positive mode terminal, 202 denotes a negative / positive switching terminal, 203 denotes a negative / positive mode switch, 204 denotes a negative / positive switching switch, 205 denotes a film irradiation light, 206 denotes a film, and 207 denotes a lens.

Here, when the SV camera 100 is connected to the negative / positive adapter 200, the negative / positive mode switch 203 is turned on (connection is not shown). When the system controller 116 knows that the negative / positive mode switch 203 has been turned on via the main I / F 125, the SV camera 100 operates in a film image recording mode (hereinafter referred to as a negative / positive mode).

[Problems to be solved by the invention]

However, in the above conventional example, if the negative / positive mode switch 203 is not switched or the strobe mode switch 128 is in the strobe mode position even though the SV camera 100 is connected to the negative / positive adapter 200, There was a problem of charging.

SUMMARY OF THE INVENTION An object of the present invention is to provide a still video camera system which solves the above-mentioned problems of the prior art and which prevents wasteful consumption of a battery and generation of noise due to charging current. It is.

[Means for solving the problem]

For this reason, the still video camera system according to the present invention has a built-in strobe, a still video camera body having a film image recording mode for recording an image on a film, and a film set to connect the still video camera body. A still video camera system comprising a negative / positive adapter, comprising a system control means for detecting that the system video camera body is connected to the negative / positive adapter and for inhibiting charging of the strobe. It is intended to achieve the above object.

[Action]

With the above configuration, it is possible to set a film on the negative-positive adapter, connect the still video camera body, and record an image on the film in the film image recording mode.

When the system video camera body is connected to the negative / positive adapter, the system control means detects this and prohibits charging of the strobe.

〔Example〕

Hereinafter, a still video camera system (hereinafter, referred to as an SV camera system) according to the present invention will be described with reference to embodiments.

FIG. 1 is a block diagram of one embodiment, and an SV camera system includes an SV camera body and a negative-positive adapter. 100 is an SV camera body, and 200 is a negative / positive adapter. The same or corresponding parts as those in the description of the conventional example are denoted by the same reference numerals, and duplicate description will be omitted. In addition, strobe 12
A flash mode switch 128 for selecting ON / OFF of 3 is added to the main I / F 125.

When the SV camera body 100 is connected to the negative / positive adapter 200, the connection is detected by mechanical means, electric means, or magnetic means, and the negative / positive mode switch is detected.
A mechanism (not shown) for switching the 203 to the negative / positive mode and forcibly setting the strobe off mode by operating the strobe mode switch 128 or its circuit.

FIG. 2 is a flowchart showing the operation of the SV camera body 100 alone in this embodiment. Referring to FIG.
The operation of the camera body 100 will be described. Step # 201
When the system controller 116 detects that the first switch 126 is turned on, the process proceeds to step # 202. In # 202, photometry / light control sensor
Photometry is performed by 122. And by Syscon 116,
A photometric operation is performed to determine an exposure value that provides an appropriate amount of exposure. Proceeding to step # 203, if a sufficient exposure amount cannot be obtained in step # 202 and it is determined that a strobe is necessary, or if the strobe is turned on by the strobe mode switch 128, the process proceeds to step # 204.
Proceed to. On the other hand, if there is no need to use the flash,
Proceed to. In step # 204, if the flash charging is completed, the process proceeds to step # 206. If the charging is not completed, the process proceeds to step # 205 to charge the flash, and the process returns to step # 204 to check whether the flash charging is completed.

In # 206, the second switch 127 is turned on and the
If detected by # 116, the process proceeds to # 207 and in # 206, when the ON of the second switch 127 is not detected,
Returning to step # 201, ON detection of the first switch 126 is performed again.

In step # 207, when it is confirmed that the rotation of the spindle motor 120 is stable and recording on the floppy disk 119 is possible, the process proceeds to step # 208. On the other hand, if the rotation of the spindle motor 120 is unstable, wait until the rotation is stabilized. In step # 208, the shutter 102 is driven according to the exposure value calculated in step # 202. Proceeding to # 209, exposure of the CCD 106 is performed. In # 210, the CCD 106 is read through the CCD drive circuit 112, and the read video signal is
Via S / H 107, process circuit 108, negative / positive circuit 109
Input to MOD / DEMOD110. In # 211, MOD / DEMOD110
Then, the data is input to the recording / reproducing amplifier 114, passes through the circuit of the recording / reproducing amplifier 114, and is recorded on the floppy disk 119 via the recording / reproducing head 118.

FIG. 3 is a flowchart showing the operation of the SV camera system when the SV camera body 100 is connected to the negative / positive adapter 200.

In step # 301, the system controller 116 sets the first switch
When it is detected that 126 has been turned on, the process proceeds to step # 302 and the photometry / light control circuit 12
Photometry is performed by 2 and photometric calculation for determining the exposure value is performed. In # 303, the on / off of the negative / positive mode switch 203 of the negative / positive adapter 200 is detected by the system controller 116, and it is confirmed that the SV camera body 100 is connected to the negative / positive adapter 200 and is in a film image recording mode (hereinafter referred to as a negative / positive mode). Then, the process proceeds to a check routine # 309 for detecting that the second switch 127 is turned on. on the other hand,
If it is confirmed in # 303 that the mode is not negative / positive, # 3
Proceed to 04. In step # 304, if it is determined that flash photography is not necessary, or if the flash mode switch 128 is off, the process proceeds to step # 309. If flash photography is required in step # 304, and the flash mode switch 128 is on. Proceeds to step # 305 to check whether or not the strobe is in a charging completed state, and if charging is completed, proceeds to step # 309.

On the other hand, if the charging of the strobe has not been completed, the process proceeds to step # 306 to charge the strobe. Here, the process proceeds to step # 308, and if the ON operation of the negative / positive mode switch 203 is detected,
Then, the flash charging is stopped without waiting for the completion of the flash charging, and the flow advances to step # 309.

On the other hand, if the ON of the negative / positive mode switch 203 is not detected in # 307, the flow returns to # 305 to check whether the flash charging is completed. In step # 309, when the ON of the second switch 127 is detected by the system controller 116, the process proceeds to step # 310 as indicated by the AA connector. The second switch 127 at # 309
If ON is not detected, the process returns to # 301.

In # 310, if it is confirmed that the rotation of the spindle motor 120 is stable and can be recorded on the floppy disk 119, the process proceeds to # 311. If the rotation of the spindle motor 120 is unstable, wait until it is stabilized. . In step # 311, the lens shutter 102 is driven based on the exposure value determined in step # 302.

Further, at the time of flash photography, the shutter 102 is driven in accordance with the synchronization speed for flash photography, and light emission of the flash 123 and light control by the photometry / light control circuit 122 are performed. In # 312, the light is exposed to the CCD 106 through the lens 103 and the infrared cut filter 104, and photoelectric conversion is performed. Then, the process proceeds to # 313, where the CCD 106 is read out via the CCD drive 112, and R,
The G and B video signals enter the process circuit 108 through the S / H 107.

In the process circuit 108, R, G, B video signals are input,
The signals are converted into respective signals of RY, BY, and Y,
Output to In step # 314, when the negative / positive mode switch 203 is turned on to be in the negative / positive mode and the on / off of the negative / positive changeover switch 204 is detected, and it is confirmed that the film 206 in the negative / positive adapter 200 is a negative film, the system controller 116 A negative / positive switching signal is sent to the negative / positive circuit 109.

FIG. 4 is a block diagram of the negative / positive circuit 109, which will be described below with reference to FIG.

In # 315, when the negative / positive switching signal is set to negative, the three switches shown in FIG. 4 are set to the lower side, and the inversion of RY, BY, Y is selected as an input.
If it is determined in # 314 that the film is not a negative film, and a positive is selected by a negative / positive switching signal, the negative / positive circuit 10
The three switches 9 are set on the upper side, and RY, B-
Y and Y are output as they are through-out. Note that, in shooting other than the negative / positive mode, the positive is selected.

As described above, the RY, BY, and Y signals are MOD / DEMOD1
Enter 10

Next, in # 316, the recording / playback amplifier 114 is MOD / DEMOD110
Then, magnetic recording is performed on the floppy disk 119 via the recording / reproducing head 118.

As described above, an image on the film 206 such as a negative or a positive is recorded as a still image on the floppy disk 119 in the film image recording mode.

When the SV camera body 100 is connected to the negative / positive adapter 200, not only the negative / positive mode switch 203 is automatically switched, but also the strobe mode switch 128 is automatically turned off. By means, the process reliably proceeds from step # 304 to step # 309, and strobe charging is prohibited.

In the above embodiment, the negative / positive switch 204 is switched by the user to discriminate the negative / positive of the film 206. May be recorded on the SV camera system side by discriminating negative / positive.

〔The invention's effect〕

As described above, according to the present invention, the still video camera body can be connected to the negative / positive adapter and switched to the film image recording mode to record the image on the film.

When the system video camera body is connected to the negative-positive adapter, the system control means detects this and prohibits the charging of the strobe, so that unnecessary consumption of the battery is prevented and noise due to charging current is reduced. A still video camera system that prevents generation of noise in image recording can be provided.

[Brief description of the drawings]

FIG. 1 is a block diagram of one embodiment, FIG. 2 is an operation flowchart of the still video camera body of the embodiment, FIG.
FIG. 4 is an operation flowchart of the still video camera system of the above embodiment, FIG. 4 is a block diagram of the negative / positive circuit of the above embodiment, FIG. 5 is a block diagram of a conventional SV camera, and FIG. 6 is a block diagram of a conventional negative / positive adapter. It is. 100 is an SV camera, 102 is a shutter, 103 is a lens, 106 is CC
D and 107 are sample / hold circuits, 110 is a modulator / demodulator circuit, 111 is a shutter drive motor, 112
Is a CCD drive circuit, 113 is a timing generation circuit, 114 is a recording / reproduction amplifier, 115 is a motor drive circuit, 116 is a system control, 117 is a disk drive interface, 118 is a recording / reproduction head, 119 is a floppy disk, and 120 is a spinned disk. Router, 121 is a spindle motor drive circuit, 122 is a photometry / dimming circuit, 123 is a strobe, 124 is a strobe interface, 125 is a main interface, 126 is a first switch, 127 is a second switch, 128
Is the strobe mode switch, 200 is the negative / positive adapter, 2
03 is a negative / positive mode switch, 204 is a negative / positive changeover switch, 205 is a film irradiation light, 206 is a film, 207
Is a lens.

Claims (1)

(57) [Claims] 1. A still video camera having a built-in strobe and having a film image recording mode for recording an image on film, and a negative / positive adapter for setting a film and connecting the still video camera body. A still video camera system, comprising: a system control unit that detects that the system video camera body is connected to the negative / positive adapter and prohibits charging of the strobe.