JP2593447B2 - Imaging device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image pickup apparatus capable of reproducing information by itself or by connecting an adapter, and more particularly to an image pickup apparatus capable of displaying a track number in a photographing mode. It is about.

[Prior Art] Conventionally, almost all silver halide film cameras are provided with a so-called film counter for displaying the number of photographed films or the number of films to be photographed next and the remaining number of films.

On the other hand, even for an image pickup apparatus that records still image information for one screen at a time on a recording medium such as a magnetic disk, the track number of the magnetic disk to be recorded can be displayed.
It is demanded because it enhances usability.

In addition, it is expected that an image pickup apparatus of this type having a reproduction function by itself or by connecting an adapter will be the mainstream. In that case, it is necessary to display the currently reproduced track.

As described above, if the display of the number of tracks at the time of recording and the display of the track being reproduced by the image pickup apparatus having a reproduction function are performed on separate displays, there is much waste.

[Problems to be Solved by the Invention] Accordingly, the present invention has been made in view of this point, and an object of the present invention is to perform track display at the time of shooting and track display at the time of reproduction by using the same display. It is another object of the present invention to provide an image pickup apparatus capable of reducing waste of the apparatus.

Means for Solving the Problems In order to achieve the above object, the present invention relates to an image pickup apparatus capable of recording and reproducing information for each track in order from an end of a recording medium by a recording / reproducing head. A counter, a head position driver that causes the recording / reproducing head to face a track whose track number is the count value of the head position counter, a track number display that displays the count value as a track number, a reproduction mode and a recording mode. Switching means for selectively switching the recording / reproducing head, and in order to cause the recording / reproducing head to face an adjacent track on which recording is to be performed next every time recording is performed in the recording mode, the head position counter is incremented by one to increase the number of adjacent recording tracks. While the track number of the track is retained, the switching means switches the recording mode And control means for causing the head position counter to count down by one in response to a switching operation of the switching means when the mode is switched to the reproduction mode, and causing the recording / reproduction head to face a track having the count value as a track number. It is characterized by the following.

[Operation] In the present invention, when the recording mode is switched between the recording mode and the reproduction mode, the optimum track number is displayed each time.

That is, in the present invention, the track number currently being reproduced is displayed when in the playback mode, and
Every time recording is performed, the head position counter is incremented by 1 to hold the track number of the adjacent track so that the recording / reproducing head is made to face the next track to be recorded next. Is displayed, the operation can be performed with the same feeling as operating the silver halide camera.

In the present invention, when the recording mode is switched to the reproducing mode, the head position counter is decremented by one in response to the switching operation of the switching means, and the recording / reproducing head is moved to the track having the count value as the track number. Since the track number currently being regenerated is displayed by facing each other, confusion does not occur even if the recording mode and the reproduction mode are frequently switched.

EXAMPLES The present invention will be described below in detail with reference to the drawings.

FIG. 1 shows one embodiment of the present invention, in which 1U and
1D is a pulse generation circuit that has an up switch and a down switch for track feed, and generates one positive pulse each time the switch is pressed once. Here, these pulse generating circuits are referred to as an up switch and a down switch, respectively.

Numerals 2U, 2D and 5 denote counters which respectively increase and decrease the value of the digital output OUT by 1 by one positive pulse input from the terminals U and D, respectively. Counters 2U and 2D are up switches
Counts the number of times 1U and down switch 1D are pressed. The counter 5 stores the track position.

3U and 3D are the outputs of counters 2U and 2D, respectively
OR gate with OUT as input. Therefore, the OR output OROUT is low level only when the output of the counter is 0,
Otherwise, it goes high.

4U and 4D are AND gates and OR gates 3U and
Each output of the 3D is received as an input a, and an oscillation output of an oscillator 8 described later is received as an input b. Here, input a
The output c is at a high level only when both of them are at a high level, and at all other times, the output c is at a low level.

Reference numeral 6 denotes a head position driver for controlling the position of the head unit 7 based on the counter output from the head position counter 5. The absolute track position is input by a code plate (not shown) provided in the head unit 7. 5
The head is driven until the output of the head and the absolute track position match.

Reference numeral 8 denotes a pulse oscillator, which oscillates at a frequency corresponding to a speed at which the head unit 7 can sufficiently respond to track feed.

Reference numeral 9 denotes a disk-shaped recording medium, for example, which is rotated by a motor 10. Reference numeral 11 denotes a servo circuit for controlling the phase and speed of the motor 10 to predetermined values.

A recording circuit 12 records an output signal obtained by processing an input from an input terminal 16 by a recording signal processing circuit 14 on a recording medium 9 via a head unit 7 according to a switch state of a mode changeover switch 13. Alternatively, a signal read from the head unit 7 is output from the output terminal 17 via the reproduction signal processing circuit 15. A one-shot circuit 13A outputs one pulse when the mode is switched from the recording mode to the reproduction mode by the mode changeover switch 13. The output of the one-shot circuit 13A is input to the D terminal of the counter 5.

Further, reference numeral 20 denotes a decoder for decoding the count output of the head position counter 5, reference numeral 21 a driver for generating a drive output based on the decoded output, and reference numeral 22 a track display driven by the driver 21. The decoder 20 decodes the output OUT of the head position counter 5 for the track display 22, and drives the track display 22 via the driver 21 to display the number of the decoded track.
The track display 22 is, for example, a 7-segment, 2-digit LED,
It can be easily configured by using an LCD or the like. HST is a timer that outputs one pulse when a time T sufficient to complete an imaging sequence and a recording sequence has elapsed after pressing a release (not shown) for starting imaging and recording.

The operation of the configuration of the embodiment of the present invention described above will be described.

First, consider the case where the up switch 1U is pressed ten times in the reproduction mode. Because it is in playback mode,
The mode selector switch 13 causes the recording circuit 12 to be in a reproducing operation state. That is, a signal picked up from the recording medium 9 by the head unit 7 is output from the terminal 17 via the reproduction signal processing circuit 15.

When the up switch 1U is pressed ten times, ten positive pulses are input to the counter 2U, the output OUT thereof becomes 10, and the output OROUT of the OR gate becomes high level. This allows
Pulse input from the oscillator 8 is permitted through the AND gate 4U. That is, the pulse from the oscillator 8 is input to the U terminal of the head position counter 5 and the D terminal of the counter 2U via the AND gate 4U.

By doing so, the count value of the counter 5 is increased by 1 and the counter 2U is decreased by 1 by one pulse from the oscillator 8.

Thus, when only 10 pulses are input from the switch 1U, the output of the counter 2U becomes zero, the output OROUT of the OR gate 3U falls to a low level, and the AND gate 4U
Input to is prohibited.

As described above, only ten pulses are input to the U terminal of the counter 5, and the head unit 7 is transmitted by ten tracks.

Further, even if the response speed of the head unit is low, the driver 6 drives the head unit 7 to shift until the absolute track position of the head unit and the count value of the counter 5 match, so that a reliable head shift is performed.

If the down switch 1D is pressed 10 times,
In this case, similarly, ten pulses are input to the counter 5, and the head unit 7 is returned by 10 tracks.

At the same time, the decoder 20 decodes the count output “10” of the head position counter 5 so as to match the display on the display 22. Thereby, the indicator by the drain bar 21
22 displays the track number “10”.

That is, in this example, regarding the track display, the output of the head position counter 5 is always displayed by the track display 22 regardless of the shooting mode and the reproduction mode. That is, the display 22 always displays the number of the track on which the head is tracing.

In the shooting mode, this is the number of the track on which the image information to be obtained by the next release shooting is to be recorded, and the timer HST performs one shooting and recording each time a release signal is input. One pulse is output with a delay of time T sufficient for the cycle to end. Since this pulse counts up the counter 5 by one, the track number of the position advanced by one track is displayed every time one photographing is completed.

On the other hand, at the time of reproduction, the number of the currently reproduced track is displayed, which is extremely appropriate. Moreover,
In this embodiment, since the counter 5 is decremented by one when the mode is switched from the recording mode to the reproduction mode, the head position is on the track recorded immediately before, and a reproduction signal can be obtained immediately. Of course, an arbitrary track can be reproduced by operating the up / down switches after the first reproduction.

Although the present embodiment has been described with the number of times of pressing being specifically set to ten, it is apparent that the number of times of pressing may be generally set to n.

In addition, it is apparent that the present invention can easily configure a circuit system that executes the same operation and function by using a computer and software instead of using hardware such as a counter and a gate as in the above-described embodiment. is there.

Furthermore, the recording signal processing circuit 14 and its input terminal
Reference numeral 16 may be an imaging device such as an electronic camera, and the entire system shown in FIG. 1 may be formed as an imaging device having a reproducing capability.

[Effects of the Invention] As described above, according to the present invention, when the recording mode and the reproduction mode are switched by the switching unit,
There is a remarkable effect that an optimum track number is displayed each time.

That is, in the present invention, the track number currently being reproduced is displayed when in the playback mode, and
Every time recording is performed, the head position counter is incremented by 1 to hold the track number of the adjacent track so that the recording / reproducing head is made to face the next track to be recorded next. Is displayed, the operation can be performed with the same feeling as operating the silver halide camera.

In the present invention, when the recording mode is switched to the reproducing mode, the head position counter is decremented by one in response to the switching operation of the switching means, and the recording / reproducing head is moved to the track having the count value as the track number. Since the track number currently being regenerated is displayed by facing each other, confusion does not occur even if the recording mode and the reproduction mode are frequently switched.

[Brief description of the drawings]

FIG. 1 is an electric circuit diagram showing one embodiment of the present invention. 1U: Up switch (pulse generation circuit), 1D: Down switch (pulse generation circuit), 2U, 2D: Counter, 3
U, 3D …… OR gate, 4U, 4D …… and gate, 5 ……
Head position counter, 6 Head position driver, 7
... Head unit, 8 ... Pulse oscillator, 9 ... Recording medium, 10 ... Motor, 11 ... Servo circuit, 12 ... Recording circuit, 13 ... Mode switch, 14 ... Recording signal processing circuit, 15 ... ... Reproduction signal processing circuit, 16 ... Input terminal, 17 ...
... Output terminals, 20 ... Decoders, 21 ... Drivers, 22 ...
Track indicator.

Claims (1)

(57) [Claims] 1. An image pickup apparatus capable of recording and reproducing information for each track in order from an end of a recording medium by a recording / reproducing head, wherein a head position counter and a track having a count value of the head position counter as a track number are provided. A head position driver for facing the recording / reproducing head, a track number display for displaying the count value as a track number, switching means for selectively switching between a reproducing mode and a recording mode, and each time recording is performed in the recording mode In order to make the recording / reproducing head face the next track on which recording is to be performed next, the head position counter is incremented by one to hold the track number of the adjacent track, and the switching means reproduces the data from the recording mode. The mode switching means Said head position counter in response to the switching operation by one count-down, the image pickup apparatus characterized in that it comprises a control means for opposing said recording head to a track of the count value and the track number, the.