JPS60193088A - Transmission method of hand-written information - Google Patents

Abstract

PURPOSE:To obtain a high read position accuracy with simple constitution by converting line picture information read out from the reverse side in accordance with the position of an image sensor and by transmitting the position information once. CONSTITUTION:A one-dimensional image sensor 4 carries out main scanning of a line picture entered on the surface of a recording medium in the main scanning direction X from the reverse side, outputs line picture data DA and supplies them to a position information extraction part 6, which compares the supplied line picture data DA with storage data stored in a memory circuit 64, writes line picture data and outputs the corresponding position information. An address counter 63 generates an address at every scanning line in the positive direction YF in the subscanning direction and supplies it to the memory circuit 64. A comparator 65 compares the line picture data DA with storage data corresponding to the line picture data and outputs the position information to a transmission path from the memory circuit 64.

Description

[Detailed description of the invention] [Technical field to which the invention pertains] The present invention relates to a handwritten information transmission method.

[Prior art]

Conventionally, handwritten information is obtained by converting the position of the elutriation means into an electrical signal, and the handwritten information is transmitted to a transmission line using a capacitive coupling method or an electromagnetic induction method. There are various types, such as the horizontal method and the resistance second method, which are technically well known.

However, each of the above-mentioned systems has the disadvantage that the configuration is complicated, and that the reading position accuracy is limited due to the principle and structure, and the desired resolution cannot be obtained.

[Purpose of the invention]

An object of the present invention is to read a handwritten line drawing written from the front side from the back side using a one-dimensional image sensor, and to convert the read line drawing information into the main scanning direction (first direction) of the one-dimensional image sensor. direction) and the sub-scanning direction (second direction), and convert the position information into 1
To provide a method for transmitting handwritten information that can obtain high precision in positioning with a simple configuration by transmitting only one degree of handwriting information.

[Structure of the invention]

In the handwritten information transmission method of the present invention, a large number of light receiving elements are arranged in a line on the back side of a recording medium in a direction corresponding to a first direction parallel to the recording wave body, so that information written from the front side can be read from the back side. arranging an array of imaging means, writing a required line drawing on the surface of the recording medium using a manually operated means;
The imaging means is parallel to the recording medium and the first
The line drawing is read in a line scanning manner in the first direction, outputting a plurality of line data, and each line drawing data is transferred to the first direction.
and the second direction, and compares the stored data stored at the address indicated by each position information with the corresponding line drawing data, and when the line drawing data is large, the line drawing The storage device is configured to store the take and transmit the corresponding position information to the transmission path.

[Explanation of Examples]

Embodiments of the present invention will be described in detail below with reference to the drawings.

1 and 2 are a perspective view of a mechanical structure and a block diagram of an electrical structure, respectively, for explaining an embodiment of the method of the present invention.

In FIG. 1, the recording medium 1 is a double-sided color-producing thermal paper that develops color on the back side when written from the front side with a thermal pen, and the writing instrument 3 is a thermal pen. Other combinations of recording media and writing instruments include:
There are pressure-sensitive paper with a color-producing type on the back, ballpoint pens, pencils, etc., as well as θ transparent film and ink writing instruments.

A recording medium 1 is placed on a transparent stand 2 made of glass plate or the like, and required information is written on the surface using a writing instrument 3.

Information such as drawn line drawings is recorded by a large number of light-receiving elements arranged on the back side of the transparent base 2 arranged in a row in a first direction parallel to the recording medium 1 (hereinafter referred to as the main scanning direction). is read in the main scanning direction X by a one-dimensional image sensor 4.

The one-dimensional image sensor 4 is a contact-type one-dimensional image sensor, and includes an illumination light source and a driving circuit. In addition,
In this embodiment, a contact type one-dimensional image sensor is used, but other types can also be used.

The one-dimensional image sensor 4 is connected to a feed screw 52 of the drive mechanism 5 via a split nut 53. Drive 4N! ￥5U
It includes a clutch 51 that transmits the rotation of the step motor 10 to the feed screw 52, a clutch 54 that transmits the rotation of the feed screw 52 and the motor 11 to the feed screw 52, photo sensors 55 and 56, and protruding pieces 57 and 58, The one-dimensional image sensor 4 is moved in the forward direction YF and the reverse direction YB in a second direction (hereinafter referred to as the sub-scanning direction) under the drive control of the drive control section 7 shown in FIG.

The feed screw 52 is set so that the one-dimensional image sensor 4 is in the forward direction YF.
When moving in the direction Yn, it rotates forward at a predetermined sub-scanning speed, and when moving in the reverse direction Yn, it rotates reversely at a fast forward speed.

When the writing instrument 3 is removed from the writing instrument holder (not shown), as shown in FIG.
Large input supplied.

Since the voltage of 1,000y# is supplied to the D input of the FF 71, the Q output becomes "high", and the "high" operation timing signal H is output from the OR circuit 77, and the motor clock generation circuit 8 supplied to

The motor clock generation circuit 8 is a counter, and the number of motion clocks FS corresponding to the cycle of the motor clock corresponding to the sub-scanning speed is set in advance, and the number of motion clocks FS corresponding to the period of the motor clock corresponding to the sub-scanning speed is set in advance.
When is "high", the pixel clock F8 is counted and the pulse generated every time the set value is reached is divided into 1/2 to generate the motor clock FM. The motor drive circuit 9 transfers the drive gravity controlled by the motor clock FM to the step motor 10.
At the same time, commercial AC power is supplied to the motor 11.

At startup, the one-dimensional image sensor 4 is at the position (initial position) where it has finished moving in the reverse direction YB shown in FIG.
The protruding piece 57 is inserted into the detection part of the photosensor 55, and the normal feed signal A is "rno・i" 1. On the other hand, the activation stop signal F from the AND circuit 78 of the drive control section 7 is "
LOW”, the clutch drive circuit 79 is in a reverse feed control state, but during the period when the forward feed signal A of “/・I” is supplied, no power is supplied to the clutch 54, and therefore the feed screw 52 is in a state of reverse feed control. does not rotate. As a result, no matter where the one-dimensional image sensor 4 is at the time of startup, it quickly returns to the initial position.

The drive control unit 7 is F)'71. ~, 76, and OR circuit 7
7.80, error and logic circuit 78, and clutch drive circuit 7
9, and according to the read signal R1 forward feed signal A and reverse feed signal B, start and stop the clutches 51 and 54 and the aforementioned motor clock generation circuit 8, as well as one-dimensional image sensor 4'J. =Yhi position "1" The running stop number F is supplied to the information extracting section 6. The side operation of the ji/dynamic braking control section will be explained below with reference to the time chart shown in FIG.

When the read signal R becomes "rno-i" at time t1 shown in FIG. 3, the "high" operation timing signal H is output from the OR circuit 77 and is supplied to the AND circuit 78, as described above. 1. On the other hand, the normal feed signal A is “high” and the FF
An activation/stop timing signal E of "no/y" is supplied from the Q output of the logic circuit 76 to the AND circuit 78 . Therefore, the OR circuit 78 outputs a "high" activation stop signal F.

The clutch drive circuit 79 is configured so that the supplied start/stop signal F is "
During the "High" period, the clutch 51 is operated to transmit the rotation of the step motor 10 to the feed screw 52, and as shown in FIG. Move at scanning speed.

At time t2 shown in FIG. 3, the protruding piece 58 shown in FIG. 1 is inserted into the detection portion of the photosensor 56, and the photosensor 56 generates a "high" reverse feed signal B. The start/stop timing signal E from the FF 75 becomes "low," the start/stop signal F from the AND circuit 78 becomes "low," and the clutch drive circuit 79 stops the driving power to the clutch 51 and applies power to the clutch 54. Supply driving power. Therefore, motor 11
The rotation is transmitted to the feed screw 52, and the feed screw 52 is reversed to move the one-dimensional image sensor 4 in the reverse direction YB at a rapid traverse speed.

Here, the one-dimensional image sensor 4 does not reciprocate once, the third
Assume that the writing instrument 3 is returned to the writing instrument holder at time t3 shown in the figure. The read signal R becomes “low”, but FF71
The Q output continues to be "No 1", and the one-dimensional image sensor 4 continues to move in the opposite direction YB. At time t4, the normal feed signal A is generated from the photosensor 55, and the Q output of the FF 72 becomes "high". Subsequently, when the next forward feed signal A is generated at time t5 after one round trip, the Q output of FF73 becomes "low", and at that point the total 1-take signal ratio becomes "low".
If so, the output signal from the OR circuit 80 becomes "low" and the FF 71 is reset, the operation timing signal H from the OR circuit 77 becomes "low", and the AND circuit 78
The start/stop signal F continues to be in the low state.

However, at time t5, the clutch drive circuit 79
Since the "high" normal feed signal A is supplied to the clutch 54, and as described above, the supply of driving power to the clutch 54 is stopped, the one-dimensional image sensor 4 is stopped at the initial position.

Next, at time tI shown in FIG.
Let's say you're high. Similarly to the above, the one-dimensional image sensor 4 is reciprocated in the sub-scanning direction, and at time tf after one reciprocation, the forward feed signal A is generated and the Q outputs of FF72 and FF74 become "high". . Here, time t
11, when the read signal ratio becomes "low" (indicated by the dashed line in FIG. 3), the reciprocating movement continues in the same way as above, and the next normal feed signal A is generated at time t9, and the FF73
The Q output of FF75 becomes "low" and the Q output of FF75 becomes "high".

Therefore, the output signal from the OR circuit 80 becomes "low", FF71 is reset and the Q output becomes "low", but since the Q output of FF75 is "high", the operation from the OR circuit 77 is Timing signal H continues to be "high",
The one-dimensional image sensor 4 continues to move back and forth.

On the other hand, since the Q output of FF74 becomes "low" at time t, the time tii when the next forward feed signal A is generated after one round trip.
When the Q output of KFF75 goes low, the logical sum time v7
When the operation timing coefficient H from 7 is set to "low", the one-dimensional image sensor 4 returns to the initial position in the same manner as above.

As shown by the solid line in FIG. 3, two reciprocating movements start from time t6, that is, the time tloK after the normal feed signal A is deactivated twice.
When the ship-to-ship transfer signal becomes "low", the Q output of FF74 becomes "low" at time tll when the next forward feed signal A is generated, and further when the forward feed signal A is generated after one round trip. At time t12, the Q output of FF 75 goes low, and the reciprocating movement stops. The same applies to the case after three or more round trips tj. In this way, the operation timing signal H is "high"
The one-dimensional image sensor 4 is repeatedly moved back and forth during the period i.
l, 敲1. One reciprocating movement is performed after the take signal R becomes "low".

On the other hand, as shown in FIG. 2, the start/stop signal F is supplied to the one-dimensional image sensor 4. 1D image sensor 4
performs self-education using the separately supplied pixel clock F8 while the start/stop signal F is "high", and prints a line drawing written on the front surface of the recording medium 1 from the back side in the main scanning direction X shown in FIG. Main scanning is performed to output line drawing data DA of "1" for black and "0" for white, and supply it to the position information extraction section 6.

The position information extraction unit 6 includes an address counter 61, 63, a counter 62, a storage circuit 64, and a comparison circuit 65.
During the period when the start/stop signal F is "high", the supplied line drawing data DA is compared with the stored data already stored in the memory circuit 64, and if the line drawing data 9 is large, the line drawing data is written and the corresponding position is written. Output information.

The address counter 61 is for main scanning and the start stop signal F is "
During the "high" period, the pixel clock F8 is counted to generate an address for each pixel in the main scanning direction
supply to. The counter 62 is set in advance with the number of clocks FM of the step motor 10 corresponding to one scanning line, and counts the motor clock FM during the period when the start/stop signal 1' is "high" to reach the set value. Generates a pulse signal each time the target is reached. The address counter 63 is a counter for the scanning line p, and the period counter 6 for which the activation stop signal F is "no/y".
The memory circuit 64 counts the pulse signals from 2 and generates an address for each scanning line in the positive direction Yp in the sub-scanning direction.
supply to.

The memory circuit 641i is set to an initial value and supplied with the line drawing data at the time of startup of the controller R. Each address for the main chaotic direction X and the positive direction YF in the sub-scanning direction. When the instruction is given, the storage take that has already been stored is supplied to the comparison circuit 65.

The comparison circuit 65 compares the nine line drawing data and the stored data corresponding to the line drawing data, and when the stored data is "0" and the line drawing data is "1", the line drawing data is written to the designated address and stored data. [Update to month. At the same time, each address is output as position information, modulated in accordance with the transmission speed by a line interface (not shown), and sent out to the transmission line.

When the writing on the storage medium 1 is completed, by attaching the writing instrument 3 to the writing instrument holder, the reading number 46 R becomes "low", and after at least one reciprocation, the operation timing coefficient H becomes "low". At that time, I finished the dispatcher.

In addition, when copying a written original using regular paper, the original is turned over and set on a transparent stand, and the one-dimensional image sensor 4 is moved back and forth to read and write the 1ilIl information in the memory circuit 4. Facsimile transmission can be performed by sequentially reading out the stored image data from the direction opposite to the main scanning direction X in synchronization with the speed of the opposing facsimile machine.

Next, FIGS. 4 and 5 are a perspective view of the mechanical structure and a block diagram of the electrical structure, respectively, showing an example of the recording apparatus according to the method of the present invention.

In Fig. 4, the recording medium 1' is a thermal recording paper of the surface coloring type that develops color on the side opposite to the heated side, and each
It is held between a pair of feed rollers 15 and 16 and stretched without slack.

The storage unit 14 is located on the back surface 111+ (heating surface) of the recording medium 1'.
The shaft is rotatably supported by the bearing of the support member 143 and presses the recording electrode 141 to press the recording medium 1'. Once the presser roller 142 is clamped between the recording electrode 141 and the support member 143, the bearing of the support member 143 is pushed downward by a spring (not shown), and the presser roller 2142 is held at 91.
The recording electrode 141 is pressed with a certain pressure.

Recording Department I! j141 has several heating elements arranged in a line in the main scanning direction X at predetermined intervals.
The drive circuit is installed inside the koshirae.

The structure and operation of the drive mechanism 5' are the same as those of the drive mechanism 5 described above, and the recording section 14 is moved in the forward direction Y'P in the sub-scanning direction and in the furnace direction by the drive control of the drive control section 7' shown in FIG. Move in direction Yn.

In FIG. 5, the configurations and operating lines of the motor crank starting circuit 8' and the motor drive circuit 9' are the same as those described above, and the drive control section 7 is shown in FIG.
Starts with the start signal from ', and starts the motor clock FN.
is generated to rotate the stop motor 10' at a rotational speed corresponding to the sub-scanning speed, and at the same time, commercial AC power is supplied to the motor 11'.

During the period when the receiving signal is "high," the drive control section 7' receives a forward feed signal A generated from the photosensor 55' after the recording section 14 moves in the reverse direction, and a reverse feed signal A generated from the photosensor 56' after the recording section 14 moves in the forward direction. According to B, ri2tsuchi51'
and drives and controls the clutch 54'. Furthermore, the recording unit 14 at least once after the receiving signal becomes “low”.
move back and forth.

These control operations are basically the same as those described above.

On the other hand, the transmitted position information is demodulated by a line interface (not shown) and supplied to the storage unit 12 as addresses in the main scanning direction X and the positive direction Y'F in the sub-scanning direction indicated by the position information.

The memory unit 2 is cleared at the rising edge of the activation signal from the drive control unit 7', and according to the addresses in the main scanning direction and the sub-scanning direction, which are sequentially supplied while the signal is "high",
F') Store "1" indicating black at a fixed address as recording data DR.

The storage section 12 counts the motor clock F'N in response to the solicitation instruction signal supplied from the drive control section 7' while the recording section 14 is moving in the forward direction YF, and calculates the number of motor clocks F'N in the forward direction YF in the sub-scanning direction. For each address set in scanning number 111 indicating the position of the recording section 14, the stored recording data DR of "1" for black and "0" for white is read out in the main scanning direction 14, and when one scanning line is read out, the stored data corresponding to that scanning line is cleared.

The recording section 14 stores the recording data DR for one time, and records one scanning line at a time in response to a recording instruction signal supplied from the storage section 12 every time one scanning line is finished. .

〔Effect of the invention〕

As described above, according to the present invention, instead of converting the position of the writing means into direct payment vertical and horizontal coordinate signals, handwritten information written from the front side is read by the company's incompetence from the &Th side using an imaging means, A simple configuration can be achieved by converting the read +1 information into position 4 information based on the position of the imaging means in the main scanning direction and sub-scanning direction, and transmitting the flute emotion ζ once. It is effective in improving image quality and realizing low-cost manual information transmission because it can obtain a high level of quality.

[Brief explanation of drawings]

Figures 1 and 2 are a perspective view of the mechanical structure and a block diagram of the electrical configuration, respectively, to illustrate a one-shot embodiment of the method of the present invention, and Figure 3 shows the operation of the drive control section in Figure 2. FIGS. 4, 5, and 5 are time charts for explanation, respectively showing an example of the recording section according to the method of the present invention.

Claims (1)

[Claims] Imaging means in which a large number of light receiving elements are arranged in a line in a direction corresponding to a first direction parallel to the recording medium is disposed on the back side of the recording medium that can read information written from the front side from the back side. Then, grains 1. are formed on the surface of the recording medium. A required line drawing is entered with a marking means operated by the user, and the line drawing is written in the first direction while the imaging means is repeatedly moved back and forth in a second direction that is parallel to the recording medium and orthogonal to the first direction. outputs a plurality of line drawing data read in a line scanning manner in the direction of , converts each of the line drawing data into positional information corresponding to the first direction and the second direction, and outputs the line drawing data to the address indicated by each of the positional information. The stored stored data and the corresponding line drawing data are compared, and the f! A method for transmitting handwritten information, characterized in that when fili1 data is large, the line drawing data is stored and the corresponding position information is transmitted to a transmission path.