JPH01183281A - Still video camera - Google Patents

Abstract

PURPOSE:To turn the title still video camera into a reproducing mode automatically through simple constitution when a reproducing adapter is connected to it by providing a means to detect that power was supplied from the reproducing adapter, and a switching means. CONSTITUTION:When the reproducing adapter 17 is connected to the still video camera 1, the potential of a terminal 1a rises on account of power source supply from a power source supply circuit 18, and the base voltage of a transistor(TR) 21a rises as well. Consequently, the TR 21a turns into ON state, and a collector voltage falls. Accordingly, the terminal 5b comes to be a reference (earth) potential. Thus, a CPU for control 5 detects that the reproducing adapter 17 was connected, and gives a control signal for reproduction to respective parts, and the still video camera 1 shifts to the reproducing mode. Thus, by connecting the reproducing adapter 17 to the still video camera 1, the reproduction can be automatically performed.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a still video camera, and more specifically, to a still video camera.
The present invention relates to a still video camera that can be played back by using it with a playback adapter.

(Blue Eye of the Invention) In recent years, still video cameras that can record still images on magnetic disks and still video playback devices that play back the recorded still images have been put into practical use. When such a still video camera and playback device are used, unlike conventional film cameras, it is possible to play back captured still images extremely easily without requiring any developing or fixing processes.

FIG. 2 is a block diagram showing an example of such a still video camera.

In the figure, 1 is a still video camera that can record still images and can also be played back when used with a playback adapter described later, 2 is a release switch that instructs to record still images, and 3 is a switch for transporting the subject. 4 is a COD that converts a still image into an electrical signal; 5 is a control CPU that provides control signals to each part; 5a is a power supply terminal to which a power supply voltage is applied; 5b is for detecting whether or not the playback adapter 17 is connected. 6 is a video signal processing circuit that converts the electrical signal from the CCD 4 into a luminance signal and a color difference signal, 7 is an FM modulation circuit that frequency modulates the luminance signal and color difference signal, and 8 is a recording signal for the frequency modulated signal. Recording amplifier that converts to 9 is Nl! A head that performs recording and playback by conversion, 1
0 is a head feeding mechanism for moving the head to a desired position; 11 is a video floppy for recording still images as magnetic signals; 12 is a motor for rotating the video floppy 11 at a predetermined rotation speed; 13 is a motor 12 14 is a reproduction amplifier that amplifies the signal detected by the head during reproduction, and 15 is a power supply section that converts a battery 15a or an external power source into a constant voltage and supplies it to each part.

Note that wiring from the power supply unit 15 to each circuit is omitted. 1
6 is a resistor connected between the power supply terminal 5a and the detection terminal 5b of the control CPU 5. 17 is a playback adapter used to play back still images recorded by the still video camera 1; 18 is a power supply circuit that converts a commercial power supply voltage (AolooV, etc.) to a desired voltage; 19 is a playback signal from the playback amplifier 14; 20 is an FM demodulation circuit for demodulating F
This is an encoder that converts the signal demodulated by the M demodulation circuit 19 into a composite video signal such as NTSC.

First, the operation during recording will be explained. It is assumed that the playback adapter 17 is not attached to the still video camera 1 at this time. Therefore, both terminals 5a and 5b are at the 'RFA voltage level.

The control CPtJ5 monitors the terminal 5b.
When the Ti source lightning voltage level is reached, the recording mode is activated, and the terminal 5b
When the voltage is at the reference potential level, each part is controlled to enter the playback mode. Therefore, in this state, the control CPLJ5
The still video camera 1 is set to recording mode.

Next, I can explain the operation during playback. At this time, the playback adapter 17 is connected to the still video camera 1, as shown in FIG. By connecting the terminal 17a and the terminal 1a, current is supplied from the power supply circuit 18 to the power supply unit 15. Further, by connecting the terminal 17C and the terminal 1C, the ground of the still video camera 1 and the ground of the playback adapter 17 are commonly connected. Then, by connecting the terminal 1b and the terminal 17b, the control CPU 5
The level of terminal 5b becomes equal to the ground potential. Thereby, the control CPU 5 detects that the playback adapter 17 is connected, gives control signals for playback to each part, and the still video camera 1 shifts to playback mode.

(Problems to be Solved by the Invention) When the still video camera 1 and the playback adapter 17 are connected with the above-described configuration, a power supply, a ground, a signal, a connection detection, and at least four connector terminals or connection cords are required. For this reason, there was a drawback that the structure for connection had to be complicated.

The present invention has been made in view of the above-mentioned problems, and its purpose is to realize a still video camera with a simple configuration that automatically enters playback mode when a playback adapter is connected. be.

(Means for Solving the Problems) The present invention that solves the above problems is a still video camera that records still images on a magnetic disk and further enables playback when used with a playback adapter. Connecting means for supplying power from the playback adapter to the still video camera and transmitting playback signals from the still video camera to the playback adapter, and detection for detecting that power is supplied from the playback adapter via the connection means. and a control means for switching the still video camera to either recording mode or playback mode according to the detection result of the detection means, and configured to switch to the playback mode when power is supplied from the playback adapter. It is characterized by:

(Function) When the playback adapter is connected to the still video camera, power is supplied from the playback adapter to the still video camera. When the detection means detects this power supply, the control means switches the still video camera from recording mode to playback mode.

(Example) Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention.

In the figure, 1 is a still video camera that can record still images and can also be played back when used with a playback adapter described later, 2 is a release switch for instructing still image recording, and 3 is a camera that captures an image of a subject. lens for
5 is a COD that converts a still image into an electrical signal, 5 is a control CPtJ that provides control signals to each part, 5a is a power supply terminal to which a power supply voltage is applied, and 5b is a detection terminal for detecting whether or not the playback adapter 17 is connected. , 6 is a video signal processing circuit that converts the electrical signal from the CCD 4 into a luminance signal and a color difference signal, 7 is an FM modulation circuit that frequency modulates the luminance signal and color difference signal, and 8 is a circuit that converts the frequency modulated signal into a recording signal. A recording amplifier, 9 a head for recording and reproducing information on a video floppy by electromagnetic conversion, 10 a head transport mechanism for moving the head to a desired position, 11 a video floppy for recording still images as magnetic signals, 12 a video floppy A motor for rotating the floppy 11 at a predetermined number of rotations, 13 a servo circuit for driving the motor 12, 14 a reproduction amplifier for amplifying the signal detected by the head during reproduction, 1
5 is a battery 1 built into the still video camera 1
This is a power supply unit that converts the voltage of 5a or a power supply voltage applied from the outside into a constant voltage and supplies it to each part. Note that wiring from the power supply unit 15 to each circuit is omitted. 16 is a resistor connected between the power supply terminal 5a and the detection terminal 5b of the control CPLJ5. 17 is a playback adapter used to play back still images recorded with the still video camera 1; 18 is a power supply circuit that converts a commercial power supply voltage (Aoloov, etc.) to a desired voltage; and one is a playback from the playback amplifier 14. An FM demodulation circuit 20 for demodulating the signal is an encoder that converts the signal demodulated by the FM demodulation circuit 19 into a composite video signal such as NTSC. Furthermore, power supply circuit 1
Wiring from 8 to each circuit is omitted.

21 is a detection circuit for detecting the connection state between the playback adapter 17 and the still video camera 1.

21a is a transistor whose collector terminal is connected to the detection terminal 5b and whose emitter terminal is connected to ground. 21b is a base resistor connected between the terminal 1a and the base of the transistor 21a, and 21C is the transistor 21
It is a resistor connected between the base of a and ground.

First, the operation during recording will be explained. It is assumed that the playback adapter 17 is not attached to the still video camera 1 at this time. Therefore, the transistor 21a is in an off state, and the terminals 5a and 5b are both at the power supply voltage level.

The control CPU 5 monitors the terminal 5b and controls each part so that the recording mode is set when the terminal 5b is at the power supply voltage level, and the playback mode is set when the terminal 5b is at the reference (earth) potential level. Therefore, in this state, the control CP
U5 puts the still video camera 1 into recording mode.

When the release switch 2 is operated to photograph a subject (not shown), the control CPLJ 5 gives instruction signals for still image photography to each part. The still image is converted into an electric signal by the CCD 4, and further converted into a luminance signal and a color difference signal by the video signal processing circuit 6. These signals are frequency modulated by an FM modulation circuit 7, converted into recording signals by a recording amplifier 8, and then recorded onto a video floppy 11 via a head 9.

Next, the operation during playback will be explained. At this time, the playback adapter 17 is connected to the still video camera 1, as shown in FIG. By connecting the terminal 17a and the terminal 1a, current is supplied from the power supply circuit 18 to the power supply unit 15. Further, by connecting the terminal 17C and the terminal 1C, the ground of the still video camera 1 and the ground of the playback adapter 17 are commonly connected.

The terminal 1a has an upper potential due to the power supply from the power supply circuit 18, and the base voltage of the transistor 21a also increases. Therefore, the transistor 21a is turned on and the collector voltage decreases. Therefore, the terminal 5b becomes the reference (earth) it position. Thereby, the control CPU 5 detects that the playback adapter 17 is connected, gives control signals for playback to each part, and the still video camera 1 shifts to playback mode.

Still image information recorded on the video floppy 11 is detected by the head 9, amplified by the playback amplifier 14,
The signal is demodulated by the FMS modulation circuit 19 on the playback adapter 17 side, converted into an NTSC shaded composite video signal by the encoder 20, and output.

By configuring the detection circuit as described above, by connecting the playback adapter 17 to the still video camera 1, playback can be performed automatically.

Further, the still video camera 1 and the playback adapter 17 can be connected using three connection lines, and a dedicated connection line is not required to detect the connection.

In the above embodiment, the power supply section 18 is provided in the reproduction adapter, but an AC adapter may be provided outside the reproduction adapter 17.

(Effects of the Invention) As described in detail above, according to the present invention, a detection circuit is provided that detects that power is supplied from the playback adapter, and the control CPU switches to recording mode based on the detection result of this detection circuit. By configuring the camera to switch to playback mode, it is possible to realize a still video camera that automatically switches to playback mode when a playback adapter is connected, with a simple configuration.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention, and FIG. 2 is a block diagram showing the configuration of a conventional still video camera. 1... Still video camera 2... Release switch 3... Lens 4...
CCD 5...Control CPLI6...
・Video signal processing circuit 7...FM modulation circuit 8...
Recording amplifier 9...Head 10...Head feed mechanism 11...Video floppy 12...Motor 13...Servo circuit 1
4... Reproduction amplifier 15... Power supply part-15a
...Battery 16.21b, 21c...Resistor 17...Reproduction adapter 18...Power supply circuit 19
...FMtl adjustment circuit 20...encoder 21
...Detection circuit 21a...Transistor 21 Patent applicant Konica Co., Ltd.
Company representative Patent attorney Tsukishima
Fuji Jigai 1 person

Claims (1)

[Claims] A still video camera that records still images on a magnetic disk and can be played back by being used with a playback adapter, which supplies power from the playback adapter to the still video camera during playback and plays back from the still video camera. A connection means for transmitting a signal to the playback adapter, a detection means for detecting that power is supplied from the playback adapter via the connection means, and a detection result of the detection means to switch the still video camera into recording mode or playback. What is claimed is: 1. A still video camera comprising control means for switching to one of these modes, and configured to switch to the playback mode when power is supplied from a playback adapter.