JPH05183852A - Image recording device - Google Patents

Abstract

PURPOSE:To record an image immediately after the device is started up by providing the device with a means which converts an object image into an electric signal, a means which relatively rotates a recording medium and a recording head, a means which decides the start-up of the rotating state, and a means which clears unnecessary signals of the converting means before the decision is made. CONSTITUTION:When electric power is supplied to respective circuits at the time t1 through unshown lines, a shutter control circuit 9 opens a shutter 3 and outputs transfer pulses PHI1-PHI3 from a driver circuit 8 to remove a dark current. Then exposure to an image pickup element 3 by the shutter 3 is ended after a time T0 set by a shutter speed setting circuit 6 is elapsed, and consequently image information on one image after a recording switch 17 is closed is stored in a photodetection part 18 connected to an element 5. During this period, a signal processing circuit 7, a motor control circuit 11, and the rotation of a disk 13 are started up and at the time t4, a servo lock end pulse is supplied to the circuit 8 to read image information out.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image recording apparatus capable of recording an image at a predetermined moment when the image recording apparatus is used.

[0002]

2. Description of the Related Art In a conventional apparatus having a means for obtaining an image such as a silver salt film and a means for recording the image, a subject is photographed at almost an intended timing as long as a shutter is immediately operated after a shutter release. You can do it.

In recent years, however, it has been considered to replace an image converted into an electric signal as a recording medium with, for example, a magnetic medium. In this case, an image pickup means is additionally required in addition to the recording medium. Becomes Then, a conversion circuit for setting the output signal of the image pickup means into a form suitable for recording and a mechanism for driving the recording medium or the recording head are required.

[0004]

Therefore, apart from the case where these conversion circuits and mechanisms are always driven, in the general portable image recording apparatus having a limited battery capacity, the circuit system and the mechanism system are not provided. Power should be supplied only when necessary.

However, if power is supplied to the circuit system and the mechanism system only when necessary as described above, recording will be performed before the above-mentioned circuit system or mechanism system is sufficiently started up. There is a problem that recording cannot be performed. Therefore, if the user waits until the above-mentioned circuit system and mechanical system start up before taking an image, there is a problem that the so-called shooting opportunity is lost if the time until the start-up cannot be ignored.

In view of the above points, an object of the present invention is to provide an image recording apparatus capable of stably and satisfactorily recording a target image at a desired timing.

[0007]

In order to achieve the above object, the present invention provides a conversion means for converting a subject image into an electric signal, a driving means for relatively rotating a recording medium for recording an image signal and a recording head, It is characterized by further comprising: a determination means for determining that the rotation state of the drive means rises to a predetermined state, and a means for clearing an unnecessary signal of the conversion means before the determination of the determination means.

[0008]

EXAMPLES The present invention will be described in detail below based on examples.

FIG. 1 is a block diagram showing an embodiment of the configuration of an image recording apparatus according to the present invention.

Reference numeral 1 in the drawing denotes an image pickup optical system. Reference numeral 2 denotes a diaphragm means, which may be physical or mechanical. Reference numeral 3 denotes a shutter means, which may be physical or mechanical. It may also be used as the diaphragm 2. 5 is, for example, CCD (Charg
A photoelectric conversion type image pickup means such as an e-coupled device. Reference numeral 4 denotes a color filter arranged in front of the image pickup means, which may be a stripe type or a mosaic type.

Further, this filter may be omitted in order to obtain only a monochrome image. 6 is a shutter time setting circuit, 7
Is a video signal processing circuit which converts the image information obtained from the image pickup means into an appropriate signal form. A driver circuit 8 controls scanning, transfer, and the like of the image pickup means 5. A shutter control circuit 9 controls the opening and closing of the shutter means 3 in accordance with the set value of the setting circuit 6. A sequence control circuit 10 controls the sequence and the like of the entire image recording apparatus of this embodiment.

Reference numeral 11 denotes a motor control circuit which is controlled by the sequence control circuit when the power switch is turned on. Reference numeral 12 is a motor synchronously controlled by the control circuit 11, 13 is a magnetic disk rotationally driven by the motor, 14 is a magnetic head, and 15 is a PG head, and the rotation phase of the motor is fed back to the motor control circuit 11. The F terminal is a terminal for outputting a servo lock signal, 1
Reference numeral 6 is a clock oscillator, and 17 is a recording switch, which also serves as a power switch in this embodiment. D is a display device.

FIG. 2 is a schematic diagram showing an example of the structure of, for example, an interline CCD as the image pickup means shown in FIG.

In the figure, 18 is a light receiving portion, 19 is a vertical shift register, 20 is a horizontal register, 21 is an amplifier, φ ₁ is a shift pulse from each picture element to a vertical register, φ ₂ is a vertical transfer pulse, and φ ₃ is a horizontal pulse. This is a read pulse.

The image pickup means shown may be of a frame transfer type, a MOS type or any type.

FIG. 3 is a diagram showing a timing chart of the main part of the block shown in FIG.

The present embodiment will be described in detail below with reference to FIG.

First, at time t ₁ , the recording switch 17 is closed (the output is set to H), and power is supplied to each circuit and the like via a line (not shown).

Accordingly, the shutter control circuit 9 opens the shutter 3 and the driver circuit 8 outputs transfer pulses φ ₁ , φ ₂ , and φ ₃ as shown in FIG. 3 to remove the dark current. ..

When the time T set in the shutter time setting circuit 6 elapses, the shutter finishes the exposure of the image pickup device 5, whereby the image information of one image immediately after the recording switch 17 is closed is obtained by the image pickup means 5. Will be stored in the light receiving section 18 of the.

While the image is being accumulated in the light receiving portion, the signal processing circuit 7, the motor control circuit 11, the rotation of the disk 13 and the like rise, and at time t ₄ , the servo lock in the motor control circuit 1 is completed. When the pulse is obtained from the terminal F, the driver circuit 8 starts reading the image information stored in the image pickup means 5 through the sequence control circuit as shown in FIG.

The output of the terminal F is displayed on the display device D as sound or light. From this, the time when the next image pickup is possible is known.

In the present embodiment, the power supply is held by the sequence control circuit at least until the recording on the disk 13 is completed after the switch 17 is closed. Although the reading is performed by the servo lock signal in this embodiment, the reading may be performed by a timer that outputs a signal after a predetermined time of the shutter operation. That is, it suffices that the recording system is detected in some way when it becomes stable and then read out. Further, reading may be performed by a manual switch.

As described above, according to the present embodiment, the recording switch or the imaging switch 17 also serves as the power switch, so that the power saving effect is high. Further, since a shutter is provided so as to record an image of at least one image when the power switch is opened, and the shutter is controlled, an image when the operator wants to take can be quickly obtained.

Further, since the dark current is removed prior to photographing, the S / N ratio is improved.

[0026]

As described above, according to the present invention, a target image can be stably and reliably recorded at a desired timing with a simple structure without requiring a complicated circuit structure.

[Brief description of drawings]

FIG. 1 is a block diagram showing an example of the configuration of an image recording apparatus of the present invention.

FIG. 2 is a diagram showing an example of an image pickup means usable in the present invention.

FIG. 3 is a diagram showing a timing chart of a main part in the configuration shown in FIG.

[Explanation of symbols]

 5 image pickup means 8 driver circuit 9 shutter control circuit 10 sequence control circuit 11 motor control circuit 14 head D display device

Claims (1)

[Claims] 1. A conversion means for converting a subject image into an electric signal, a drive means for relatively rotating a recording medium to record an image signal and a recording head, and a rotation state by the drive means rising to a predetermined state. An image recording apparatus comprising: a determination unit for determining, and a unit for clearing an unnecessary signal of the conversion unit before the determination by the determination unit.