KR920001186B1 - Paper feeding circuit for fax - Google Patents

Abstract

The circuit is for compensating the discontinuous transfering and non uniform speed transfering in the manual transfering mode. The circuit includes a first sensor (12) for sensing moving distance of mnuscript, a transfering compensator for maintaining exposure time according to output signal of the first sensor (12), for controlling a second sensor controller (17) and for classifying the data needed by a video signal processor (18), a code (19) for coding the output signal of the video signal processor (18), and for decoding data of a memory (20), a memory (20) for storing the output signal of the CODEC (19) and the memory (21), and an error indicator (22) for displaying speed error for the manuscript transfer speed.

Description

Fax Feed Circuit

1 is a conventional circuit diagram.

2 is a waveform diagram of a conventional circuit.

3 is a detailed waveform diagram of a circuit according to the related art.

4 is a circuit diagram of the present invention.

5 is a waveform diagram of a circuit according to the present invention.

* Explanation of symbols for the main parts of the drawings

10: Original 11: Light source

12: first sensor 13: moving distance detector

14, 15: 1st, 2nd timer 16: 2nd sensor

17: second sensor controller 18: call signal processing unit

19: codec 20: memory

21: data processing section 22; Error indication

The present invention relates to an original feed circuit in a facsimile, and more particularly to a circuit capable of transferring an original by manual feeding.

In general, the fax decoded the original while automatically feeding the original 8 by the rotation of the motor. An embodiment of the document transfer by the motor will be described with reference to the conventional circuit diagram shown. First, the configuration shows a feed roller 1 for conveying, a stepping motor 2 for rotating the feed roller 1, and a stepping motor for controlling the stepping motor 2. The controller 3, a sensor controller 5 for controlling a sensor 4, which will be described later, to obtain a desired image signal, and under the control of the sensor controller 5, an original is generated through the light of the light source 7. (8) and a sensor signal processing section (6) for receiving and processing the output of the sensor (4).

)씩 이동시키게 하고, 센서컨트롤러(5)로부터 출력되는 센서 트리거신호(b)에 의해 센서(4)를 구동한다. 상기 센서 트리거신호(b)는 제2도(e) 및 제3도(f)파형과 같고, 그 다음 센서 트리거신호(b)가 발생되기까지의 (t1)만큼의 시간동안 광을 축적하여 원고를 읽어들인다.Based on the above configuration, the operation in the copy mode in which the feed speed of the document is constant will be described. First, the output signal a of the stepping motor controller 3 drives the stepping motor 2 as shown in FIG. 2 (a)-(d) waveform so that the feed roller 1 causes the document 8 to move the document 8 for a predetermined time ( 1 line (t1)

The sensor 4 is driven by the sensor trigger signal b outputted from the sensor controller 5. The sensor trigger signal (b) is the same as the waveforms of Figs. 2 (e) and 3 (f), and then accumulates light for (t1) until the sensor trigger signal (b) is generated. Read

When the second sensor trigger signal (b) that starts reading the next line is generated, the accumulated image information is transferred to two (or one) shift registers inside the sensor 4, and the sensor controller 5 The driving clock (c) output from the sensor 4 outputs the image information transferred to the two (or one) shift registers through the pixel 4 signal signal processing unit 6 through the sensor 4 output signal e. Move to).

The waveforms of Fig. 3 (g) and (h) are the driving clocks (c) of the sensor (4), and when the shift register is one, the frequency is represented by twice the frequency. Image information input to the speech signal processor 6 through the video signal processor.

The waveform of FIG. 3 is to clear the energy of the transferred pixel prior to receiving the energy for the next pixel as the sensor 4 reset signal (d).

The talk signal processor 6 counts the number of talk signals to be input to take only necessary portions. In addition, a third sensor trigger signal (b) is generated, and light begins to accumulate on the third line (L3), and the image information on the second line (L2) is output to the sensor (4) output signal (e) in the same manner as described above. Transfer to the signal processing unit 6 through.

The above method includes a feed roller 1, a stepping motor 2, a stepping motor controller 3, and an accessory device such as a gear for transmitting the power of the stepping motor 2 to the feed roller 1; There was a problem that the device becomes large as necessary.

Accordingly, an object of the present invention is to provide a circuit capable of compensating for discontinuous and non-continuous document transfer generated by this manual feed method by manually feeding the document feed in the fax.

Another object of the present invention is to provide a facsimile document transfer circuit that can compensate for the slow speed of the document when the amount of data to be transmitted is reduced by the manual transfer method.

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

4 is a circuit diagram of the present invention, and includes a first sensor 12 for detecting the moving distance of the document 10 and a moving distance detecting unit 13 for receiving an output signal of the first sensor 12 and converting the signal into information representing the moving distance. ), A first timer 14 which makes the exposure time of the movement distance detector 13 constant for each line, and an output signal processor 18 to receive the output signal of the first timer 14 to be described later. ), A second timer 15 for separating unnecessary data and necessary data, a second sensor 16 for reading the document 10 through the light of the light source 11, and the first timer 14. A second sensor controller 17 which receives the output signal of the second sensor 16 and controls the second sensor 16, and receives the output signal of the second sensor 16, converts it into a digital signal, The picture signal processing unit 18 and the picture signal processing unit 18 which take only necessary data from among the output signals are received and encoded. And a codec 19 for decoding data of the memory 20 to be described later, a memory 20 for storing an output signal of the codec 19, and a data processor for controlling the codec 19 and the memory 20. (21) and an error indicator (22) which displays an error related to the document feed speed by the data processing section (21).

5 is a waveform diagram of a circuit according to the present invention, (a) is an output signal S1 of the moving distance detector 13, (b) is an output signal S2 of the first timer 14, ( C) is the trigger signal S3 output from the second sensor controller 17, (d) is the output signal S4 of the second timer 15, and (e) is from the second sensor controller 17. The clock signal S5 is output.

The present invention will be described in detail with reference to FIGS. 4 and 5 based on the above-described configuration. First, the first sensor 12 detects a position change equal to the displacement of the document and provides information about the displacement to the moving distance detector 13, which moves the information from the first sensor 12. In the case of constant velocity, it is made into a square wave with a duty of 50:50.

)단위의 거리 이동시 만들어진 출력으로써 수동이동시 부정속동작을 하므로 제5도(가)파형과 같이 듀티와 주기가 각각 틀리다. 또한 제2센서(16)의 특성상 요구되어지는 노광시간이(ΔT1)이며 1라인을 구성하는 총화소가 화신호처리부(18)로 완전히 전달되는데 요구하는 최소시간이(ΔT2)이다. 그래서 최소 허용 원고 이송속도는 하기(1)식과 같고 이때 라인은 (

)이다.The output signal S1 of the movement distance detecting unit 13 is a line (

This output is produced when the unit is moved in distance. Therefore, the duty and period are different as shown in the waveform of Fig. 5 (A). In addition, the exposure time required for the characteristics of the second sensor 16 is ΔT1 and the minimum time required for the total pixels constituting one line to be completely transferred to the signal processing unit 18 is ΔT2. Therefore, the minimum allowable document feed speed is as shown in the following formula (1), and the line is (

)to be.

When the document is transported at the above speed, data cannot be read.

When the output signal S1 of the movement distance detector 13 is input to the first timer 14, the first timer 14 is located at a rising edge of the output signal S1 of the movement distance detector 13. It transitions to the high state and counts the time by [Delta] T1. Then, the process changes to a low level again to maintain a constant exposure time for each line. The output signal S2 of the first timer 14 is when the normal state is low and is the same as the waveform of FIG. 5 (b). The output signal S2 of the first timer 14 is input to the second timer 15 and the second sensor controller 17. The second sensor controller 17 detects a rising and falling edge of the input output signal S2 and generates a trigger signal S3 such as a waveform of FIG. 5 (C). When each of the trigger signals S3 is activated, the second sensor 16 operates in the same manner as the conventional sensor 4, and the waveform at this time is also the same as that in FIG. 3.

That is, the second sensor 16 inputs the output signal S6 of the second sensor 16 such as the waveform of FIG. 3 to the speech signal processor 18, and resets the second sensor 16. The signal S7 is also the same as the waveform of FIG. 3. Since the output signal S6 contains unnecessary data or redundant data different from the contents of the original, a signal for distinguishing such unnecessary data is required. A signal for distinguishing necessary data among the output signals S6 of the second sensor 16 is an output signal S4 of the second timer 15, and this output signal S4 is output to the first timer 14. The signal S2 is received and activated after the exposure time, that is, at the falling edge of the output signal S2, counting a time t2 equal to or greater than ΔT2 and then converted back to a normal state.

The output signal S4 of the second timer 15 is the same as the waveform of FIG. 5 (D), and the second signal 16 is input while the output signal S4 is in the high signal processing unit 18. It recognizes the image data that actually needs only the output of and converts the image data into a digital signal and compensates for disturbances such as distortion and noise. The compensated signal S8 is input to a codec 19 and stored in the memory 20 through a coding process by real time processing.

The data processor 21 controlling the codec 19 and the memory 20 has a long encoding time in the codec 19, so that the time when the encoded data is stored in the memory 20 becomes slow, that is, the above-mentioned. When a large amount of data that is slower than the maximum allowable document moving speed is input to the codec 19, the error indicator 22 notifies the user of the fact, thereby preventing data loss. The information stored in the memory 20 by the method is utilized depending on the purpose in the transmission or copy mode.

As described above, the machine is compact because it is possible to manually transfer the document in the facsimile to compensate for the discontinuity and inconsistent speed of the document generated in this feed, and the conventionally used accessories are unnecessary. This has the advantage of producing low cost products that are easy to carry and easy to carry.

Claims (5)

A first sensor (12) for detecting a moving distance of the document (10) in a facsimile document transfer circuit having a second sensor (16), a second sensor controller (17), and a speech signal processor (18); Receiving the output signal of the first sensor 12 to make the exposure time constant and control the second sensor controller 17 and the moving compensation means for distinguishing the data required by the signal signal processing unit 18 and the A codec 19 for decoding the data of the memory 20 to be described later while receiving and encoding the output signal S8 of the signal signal processor 18, a memory 20 for storing the output signal by the codec 19, and And a data processor (21) for controlling the codec (19) and the memory (20) and an error indicator (22) for displaying an error of this speed in accordance with the document feed speed. The moving distance detecting unit (13) according to claim 1, wherein the moving compensating unit converts the output signal of the first sensor (12) into information indicating the moving distance, and the second driving signal is outputted by the output signal of the moving distance detecting unit (13). And a first timer 14 for controlling the sensor controller 17 and a second timer 15 for controlling the signal signal processor 18 based on the G output signal of the first timer 14. Facsimile document transfer circuit. The method of claim 2, wherein the output signal S2 of the first timer 14 transitions to a high state at the rising edge of the output signal S1 of the moving distance detector 13, and counts the time as T1 again. A facsimile document transfer circuit characterized by a low change. The method of claim 3, wherein the output signal S4 of the second timer 15 becomes high at the falling edge of the output signal S2 of the first timer 14, and counts the time as t2, and then goes back low. Facsimile document transfer circuit characterized by a change. 5. The facsimile manuscript transfer circuit according to claim 4, characterized in that the output signal (S4) of the second timer (15) is only necessary data input to the talk signal processing unit (18) during the high state.

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