JPS5821967A - Facsimile signal supplying circuit of electronic facsimile device - Google Patents

Abstract

PURPOSE:To obtain the titled signal supplying circuit with a simple constitution which can supply a selection signal of a thermal head group and a picture signal data to the thermal head, by using a shift register. CONSTITUTION:A facsimile device contains 27 groups of thermal head, and each of these groups has a picture signal input of 64 bits. A shift register (SR) 7 for selection of 27-bit groups and an SR8 for 64-bit picture signal data are set in series as shown in the figure. The picture signal data of 64 bits and the group selecting signal data of 27 bits in which just one bit is ''1'' are fed serially to the SR7 and SR8 in accordance with the prescribed clock given from an input terminal 9. When these data are completely stored in the SR7 and SR8, the output signal is sent to the SR7 and SR8 by a means (not shown in the figure. Then just one of the outputs 71-727 of the SR7 is set at ''1'', and the head groups are selected. Then the picture signal data 81-864 of the SR8 are sent to the selected head group to be recorded there.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is directed to a reproduction signal supply circuit Kll in an electronic reproduction apparatus such as a facsimile machine or a printer apparatus.

2. Description of the Related Art In an electronic copying apparatus, a material such as a charge medium in a thermal head is used in its printing mechanism. Here, FIG. 1 shows a circuit for driving the thermal head block by block to perform recording processing.

In FIG. 1, 1 indicates a group of thermal heads.

This thermal head group 1 includes, for example, thermal head blocks 11, 12, 13, . ---.

It has 27 up to In(ns+527).

These thermal Radblocks 11, 12, 13
, ---@1nt) respectively, signal lines 21, 22, 23 . ---
−.

2n is derived. In addition, one signal line 21, 22, 23
There are input terminals 31,32e33+-- for inputting data for block selection at the tips of ゜"--e2", respectively.
'+3n is provided.

In addition, Radblock 11, 12, 13 to thermal
, ---, lfi, rounded image signal data lines 41, 42.4L---$4111 (fnse64) are led out to each of the thermistor elements 64 and input image signal data. This image signal data line 41, 42, 43
゜---E4m has input terminals 51 and 52 at each end.
.

A leapfrog ---5m is provided.

For example, when printing is to be performed using the thermal head group IK configured as described above, the procedure is as follows. That is, input terminals 51, 52, 53. ---.

The first thermal block 11 in one line of 5mK printing self-portrait signal data provides data to be printed.

Then, in order to select the thermal block 11, active block selection data is applied to the input terminal 31. As a result, printing corresponding to the thermal block 11 is performed.

Furthermore, one thermal block 12, 13, 14. ---.

Similarly, for 1mK, the signals are sent sequentially and the printing of the first line is completed. Then, the printing paper is conveyed by one line, the same operation as described above is performed, and this is repeated to print the entire page K1.

1 for recording 11 in blocks like this.
A conventional reproduction signal supply circuit is shown in FIG. The circuit consists of a block selection decoder 2 and an image signal data latch circuit 3.

A data bus 4 through which block select data passes is connected to the boot select decoder 2. For example, when a 5-bit code is given to the block select decoder 2 via the data bus 4, 2
It is decoded into a 7-bit output signal and output.

On the other hand, the image signal data latch circuit 3 is connected to an output path 4 through which image signal data passes.

Then, for example, when the image signal data is stored in the image signal data latch circuit 3 via the output bus in 8-bit increments until the image signal data reaches 64 bits, the image signal is output.

For example, 27 lines extend from the block select decoder 2, and 64 lines extend from the image signal data latch circuit 3. These lines are input terminals 31, 32, 33 of FIG. 1, respectively.

--+, 3n and input terminals 51, 52, 53. ---. 5
It is connected to m. That is, the block selection decoder 2 and the image signal data latch circuit 3 are connected to a recording i-trix 6 such as a thermal head.

Conventionally, this configuration has made printing possible. However, the replicated signal supply path as shown in FIG. 2 has the drawback that the path requires space and a decoder is required, resulting in a complicated nodeware configuration.

The present invention has been made in view of these drawbacks.

Another object of the present invention is to provide a copying signal supply device with a simplified node configuration.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 3 is a block diagram showing an embodiment of the invention.

In the figure, 7 and 8 indicate shift registers. The shift register 7 is for storing data for block selection. For example, for a thermal head as shown in FIG. 1, its output terminals 71e 71m 7 @* ---
*27 7zt 64) are connected to the arrangement matrix 6 such as a thermal head.

The shift register 8 is a round type that stores - signal data, for example, #! For a thermal head as shown in Figure 1, its output terminals 8□, 8. .

There are 64 8m+---s8ga, which are connected to a recording matrix 6 such as a thermal head.

The shift register 7 and shift register 8 described above are wired so that data flows serially. The shift register 7 is provided with a data input terminal 9 to which serially generated image signal data and block selection data are input.

For example, when the replication signal supply circuit shown in FIG. 3 drives the thermal head 1 shown in FIG. 1, the output terminal 71 of the shift register 7 is connected to the input terminal 31 shown in FIG. The output terminal 7 of the shift register 7 is connected to the input terminal 7 in FIG. 1, and so on, and the output terminal 7z7 of the shift register 7 is connected to the input terminal 3n in FIG. Furthermore, the output terminal 8□ of the shift register 8 is the first
The output terminal 82 of the shift register 8 is connected to the input terminal 51 of FIG. 1, and the output terminal 864 of the shift register 8 is connected to the input terminal 5m of FIG. connected to.

With this configuration, both signal data and block selection data are serially input to the data input terminal 9 of the shift register 70. For example, image signal data to be printed by the thermal block IIK in FIG. The block selection data for activating the thermal block 11 in FIG. 1 is serially arranged after the large one. Therefore, 64 bits of image signal data are sequentially shifted and transmitted from the data input terminal -F9 using a clock (not shown), and then 1 bit of block selection data for activating the thermal block 11 is transmitted to the primary terminal. Sends 26 bits of inactive data to

In this way, when shift register 7 and shift register 8 are filled with data, 1! , shift register 7,
By sending a data output signal to the shift register 8] and outputting the data in parallel.

The thermal head 11 is driven.

Below, thermal block 12.13.14. ---.

- input from data input terminal 9. However, since the blocks are sequentially designated, it goes without saying that the shift register 7 stores block selection data corresponding to the designated blocks.

In this way, when one line is printed, the recording paper is transported by one line and the same operation as described above is performed.

As described above, according to the present invention, as a result of using a shift register, a bus is unnecessary and a multi-configuration is simplified. Furthermore, since a shift register tube is used and no decoder is used, the shift register for image signal transfer can be used, and the hardware configuration can be made up of very few parts.

In the embodiment, the shift registers are arranged so that the information for specifying the block is placed at the end, but the information for storing the image signal data may also be placed at the end. However, it is necessary to store the necessary data.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a thermal head, a block diagram of a conventional example of a two-wire diagram, and FIG. 3 is a block diagram of an embodiment of the invention of Fushiki. 6... Recording matrix, 7.8... Shift register Patent applicant Tokyo Shibaura Electric Co., Ltd.

Claims (1)

[Claims] In an electronic reproduction device that performs recording processing in block units,
A copying signal supply circuit in an electronic copying apparatus includes a shift register to which image signal data and block selection data are serially supplied one block at a time, and outputs the output signal of each stage of the cough shift register as a copying signal.