JPH031381A - Picture reproducing device - Google Patents

Abstract

PURPOSE:To avoid a state that a magnetic head is unnecessarily in contact with a magnetic disk and to prevent unnecessary wearing by contacting or saving the magnetic head to the surface of the magnetic disk by a head moving means according to a prescribed signal from an external device. CONSTITUTION:In a picture reproducing device 10, when a head saving command is received from a communication circuit 84, a magnetic head 20 is saved from the surface of the magnetic disk by a head carriage 23. Operation is turned to a state waiting for communication and when there is no communication in a prescribed time, it is judged that a problem on the communication is generated. Then, operation is finished. When the communication is executed form a printer 12 in the prescribed time and the communication is an end command, a CPU 34 sets the magnetic head 20 in contact with the surface of the magnetic disk by the head carriage 23 again and reproducing operation is restarted. Thus, the unnecessary wearing between the magnetic disk 14 and magnetic head 20 is avoided and a life is prolonged.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an image reproducing apparatus using a magnetic disk as a recording medium.

[Prior Art] Conventionally, there has been a system in which an image signal recorded on a magnetic disk is reproduced by an image reproducing device, and the reproduced image signal is transmitted in the form of a video signal to a peripheral device such as a printer to obtain a hard copy. The composition is considered. At this time, in the conventional configuration, the printer captures and outputs the reproduced image signal outputted from the image reproduction device in units of horizontal scanning lines. In other words, the period during which the printer is outputting,
In image reproducing devices, a reproducing magnetic head contacts the same track on a magnetic disk to reproduce signals.

Later, as the capacity and price of semiconductor memory increased, printers were equipped with an image memory consisting of a semiconductor memory capable of storing image signals for one image, and the reproduced image signal was temporarily stored in the image memory, that is, frozen, and used thereafter. , the image signals stored in the image memory are sequentially read out and printed on paper. However, even with this configuration, the image reproducing device cannot know the operating status of the printer, and therefore, unless there is a special operation by the operator, such as ejecting the magnetic disk, the magnetic head will still touch the magnetic disk. and was playing back the recorded signal.

[Problems to be Solved by the Invention] In this way, in the conventional example, unless the operator performs a special operation, the magnetic head or the magnetic disk is in contact with each other, which accelerates the wear of the magnetic head and the magnetic disk and shortens their service life. It has the disadvantage of shrinking the .

These problems also occur in peripheral devices other than printers, such as transmitters.

Therefore, it is an object of the present invention to provide an image reproducing device that eliminates such drawbacks.

[Means for Solving the Problems] An image reproducing system according to the present invention is an image reproducing device that uses a magnetic disk as an image recording medium, and receives control signals from an external device that can be freely connected to the image reproducing device. and head moving means for bringing the magnetic head into contact with or retracting from the magnetic disk, and according to a predetermined signal from the external device, the head moving means brings the magnetic head into contact with the magnetic disk surface, and moves the magnetic head to the magnetic disk surface. It is characterized by being evacuated from.

[Operation] The above means can avoid unnecessary contact between the magnetic head and the magnetic disk, and therefore can effectively prevent unnecessary wear.

[Example] Hereinafter, the present invention will be described in detail with reference to the drawings.

FIG. 1 shows a block diagram of an embodiment of the present invention. 1
0 is an image reproduction device, and 12 is a thermal printer device.

In the image reproducing device 10, 14 is a magnetic disk which is an image recording medium, and 16 is a spindle of the magnetic disk 14.
A motor, 18 a servo circuit for rotating the motor 16 at a constant speed, 20 a magnetic head, 22 a magnetic head 2
a head drive circuit that moves 0 to a desired track position;
23 is a head carriage that brings the magnetic head 20 into contact with or retreats from the disk surface of the magnetic disk 14; 24 is an amplifier; 26 is an image reproduction processing circuit that reproduces an image signal from the output of the amplifier 24; 28.29 is an image reproduction processing circuit This is an output terminal for the image signal reproduced at 26. 30 is a communication circuit that communicates with the printer device 12 using, for example, R3232C, 32 is an input/output terminal for communication signals, and 34 is a central processing circuit (CPU) that controls the operation of the image reproduction device 10 and performs arithmetic processing of various data. , 36 is an input device consisting of a keyboard, switches, etc. for manually inputting predetermined instructions to the CPU 34. The CPU 34 is of course equipped with ROM, RAM, Ilo, etc. necessary for processing.

Further, 38 is an image monitor device for monitoring the reproduced image by the image reproduction device 10.

In the printer device 12, 40 is an input terminal for image signals;
is an A/D converter that digitizes analog image signals,
44 is an image memory that can store digital image signals for one screen, 46 is a memory control circuit that controls writing and reading of the memory 44, and 48 is a D/A converter that converts the digital image signal read from the memory 44 into an analog format. vessel, 5
0 is Y that separates the analog image signal into luminance signal and color signal
/C separation circuit, 52 is R (red) from the luminance signal and color signal
, G (green), and B (blue) signals; 54 is an A/D converter that digitizes the RGB output of the matrix circuit 52; 56 is an A/D converter that converts the RGB signals into cyan (C), magenta ( 58 is a line memory capable of storing the output of the color conversion circuit 56 for one line.

60 is a halftone control circuit that controls the energy applied to the thermal head to produce halftones of a color image;
2 is a gradation ROM that holds gradation data suitable for the characteristics of consumable materials such as thermal paper and ink sheets, and 64 is a D/A converter that generates an analog voltage with an applied voltage value determined based on the head temperature. 66 is a thermal head, 68 is a temperature detection element for detecting the temperature of the thermal head 66, 7
0 is an ink sheet, 72 is a receiving paper or thermal paper that receives ink separated from the ink sheet 70 by melting or sublimation, 74 is a platen roller, 76 is a paper detection element that detects a paper jam or a paper break, and 78 is a paper detection element that detects a paper jam or a paper break. Ink sheet 7
80 is an ink/sheet detection element that detects the end of 0, a CPU 182 that controls the entire system is a human-powered device that inputs operation instructions to the CPU 80, 84 is a communication circuit that communicates with the outside, and 86 is an input/output terminal for communication signals. be.

The basic operation of the image reproducing device 10 will be explained. When the magnetic disk 14 is loaded, the spindle motor 16 starts rotating and is rotated at a predetermined constant speed by the servo circuit 18. After the spindle motor 16 has stabilized, the CPU 34 causes the head drive circuit 22 to move the magnetic head 20 to the first track, which is the outermost circumference of the magnetic disk 14, and causes the head carriage 23 to move the magnetic head 20 into contact with the magnetic disk 14. let The operator can use the manual device 36 to indicate which tracks on the magnetic disk 14 are to be played.

The output of the magnetic head 20 is supplied to an image reproduction processing circuit 26 via an amplifier 24, and the image reproduction processing circuit 26 outputs a reproduced image signal obtained by reproducing the signal recorded on the magnetic disk 14 to output terminals 28 and 29. The reproduced image can be checked by an image monitor device 38 connected to the output terminal 29.

The basic operation of the printer device 12 will be briefly explained.

When the operator instructs to start printing using the input device 82, the CPU 80 instructs the memory control circuit 46 to capture the image signal input to the image input terminal 40 into the memory 44. At this time, the memory control circuit 46 addresses the write address of the memory 44 in synchronization with the vertical and horizontal synchronization signals of the image signal input to the input terminal 40 (more precisely, the image signal digitalized by the A/D converter 42). and its timing.

The image data written in the memory 44 is non-destructively read out at the video rate, converted back to an analog signal by the D/A converter 48, and then sent to the Y/C separation circuit 50. Digital RG via matrix circuit 52 and A/D converter 54
It becomes a B signal. The color conversion circuit 56 converts the digital RGB signal into Y, M, and CB signals. The image data output from the color conversion circuit 56 is stored in a line memory 58 for each print line, and sent line by line to the halftone control circuit 60. This one line of image data is divided into gradation levels within the printing time of one line, and for each gradation level, one line of data is applied to the thermal head 66 a number of times corresponding to the number of gradations. Ru. Note that the halftone control circuit 60 has Y, M, and C.

In order to obtain gradation characteristics corresponding to the different consumable materials for each color of B, the data stored in the gradation ROM 62 is read out and applied to the thermal head 66 as a strobe signal. Furthermore, the thermal head temperature at that point is detected by the temperature detection element 6.
8, and the applied voltage that provides a predetermined concentration at the temperature is detected by cpus.

is determined and applied to the thermal head 66 via the D/A converter 64.

Thermal energy from thermal head 66 sublimates or melts the sublimable or fusible ink applied to ink sheet 70 to print the desired multi-tone image on receiving paper 72.

Communication by the communication circuit 30.84 is performed in a format consisting of, for example, a header, model name, model number, command body, and end flag, and the receiving side synchronizes with the header and selects the model name and model number. determine whether or not
If it is for you, execute the action according to the contents of the command body. Then, reception ends with an end flag.

Next, the operation shown in FIG. 1 will be explained with reference to the flowchart shown in FIG. The image reproducing device 10 selects a desired image from the human-powered device 36 and reproduces it (S20). The printer device 12 instructs to start printing from the input device 82 (
St, 2). In response to an instruction to start printing, the input terminal 40
The reproduced image signal inputted from the image reproduction device 10 is taken into the memory 44 (S3), and the paper detection element 76 and the ink sheet detection element 78 determine whether or not printing is possible, and if it is not possible, the process immediately ends. (S4). If printing is possible, the communication circuit 84 outputs a confirmation command to confirm whether or not the connected device (image playback device 10 in this embodiment) is an image playback device (S5).

In the image reproducing device 10, when the communication circuit 30 receives the confirmation command from the printer device 12 (S21), the CPU
34 determines whether the content indicates selection of an image reproduction device (523), and if so, transmits a confirmation command indicating confirmation from the communication circuit 30 (S24).
).

In the printer device 12, if there is no response within a predetermined time after sending the confirmation command (S5), the process will be terminated as either the connected device does not exist or there is a communication failure (S6, 7), and even if there is a response, the image playback device will not respond. If not, it ends in the same way (S8)
. If it turns out to be a connected device or image playback device,
Since the necessary image data is already stored in the memory 44 at this point, a head evacuation command is transmitted from the communication circuit 84 (S9).

Then, the image data in the memory 44 is read out and printed according to the above procedure. If an error occurs during the process (Sll), display that on the display element (512).
When printing is completed (SIO), a termination command is output from the communication circuit 84 (S13), and the process is terminated.

In the image reproduction bag W10, when the head evacuation command is received (S25), the head is removed. The magnetic head 14 is retracted from the magnetic disk surface by the carriage 23 (S27). Then, it enters a waiting state for communication (S28, 29), and if there is no communication within a predetermined time, it is assumed that a communication problem has occurred and the process ends.If there is communication from the printer device 12 within a predetermined time, it will issue a termination command. If (32g, 30), CP
U34 is connected to the magnetic head 2 by the head carriage 23.
0 to the magnetic disk surface again to restart the reproducing operation.

Although the case of printing one sheet at a time has been described, it is of course applicable to a case where a plurality of reproduced images to be printed are designated and sequentially reproduced and printed. Although the explanation has been given using a thermal printer as an example, configurations in which relatively low-speed image output devices such as other printers, copy machines with memory, facsimile machines with memory, image transmission devices, etc. are connected to the image reproduction device can also be used. Needless to say, it is applicable.

[Effects of the Invention] As can be easily understood from the above description, according to the present invention, unnecessary wear of the magnetic disk and magnetic head of an image reproducing device can be avoided, and a longer life can be expected.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of the configuration of an embodiment of the present invention, and FIG. 2 is an operational flowchart of FIG. 1. 10: Image reproduction device 12: Printer device 14: Magnetic disk 20. Magnetic head 262 Image reproduction processing circuit 30.84 + Communication circuit 32.86 Two communication output terminals 34.80: Central processing circuit (CPU) 66
:Thermal head 70:Ink sheet 722 Receiving paper

Claims (1)

[Claims] An image reproducing apparatus that uses a magnetic disk as an image recording medium, comprising a communication means for receiving a control signal from an external device connectable to the image reproducing apparatus, and a head moving means for bringing a magnetic head into contact with or retreating from the magnetic disk. and bringing the magnetic head into contact with the magnetic disk surface by the head moving means in accordance with a predetermined signal from the external device,
An image reproducing device characterized in that the image is retracted from the surface of a magnetic disk.