JPS62109465A - Tele-writing device - Google Patents

Abstract

PURPOSE:To use the CRT screen of a display part as a drawing part for drawing information in common by using a CRT to form a display part for drawing information and using a light receiving light pen as a drawing means for the drawing information respectively. CONSTITUTION:The drawing information sent from the remote side in a busy mode is processed at a control part 2 and displayed on the CRT screen of a display/drawing part 3. While the drawing information supplied to the CRT screen of the part 3 at its own side by means of a drawing means )light receiving type light pen) 4 is also processed at the part 2 and displayed on said screen. In order words, the light receiving type light pen is used as a drawing means 4 instead of a conventional pressure pen or a magnetic pen. Furthermore a tablet used as a drawing part in a conventional device can be omitted.

Description

Detailed Description of the Invention (Technical Field) The present invention relates to a telewriting device that can mutually send and receive handwritten characters and graphic drawing information while making a telephone call and using the telephone line. , a control unit that is interposed between the telephone and the telephone line and processes audio information and drawing information transmitted and received via the telephone line, and a display unit that displays the drawing information processed by the control unit. The present invention relates to a telewriting device 3 comprising a drawing section for drawing drawing information to be transmitted to the other party, and a drawing means used when drawing the drawing information on the drawing section.

(Prior Art) A conventional telewriting device is connected to a telephone 01 and has a telephone line 05, as shown in the overall external perspective view of FIG. 5(a) and the overall schematic block circuit diagram of FIG. 5(b). Means for synthesizing (multiplexing) or separating the audio 4I'f1 information and the drawing information sent and received via the 4I'f1 signal.

A control unit 02 which is the main part of the device including means for demodulating encoded drawing information, and a display unit 03 consisting of a display such as a CRT for displaying the drawing information processed by the control unit 02. , a drawing section 04A consisting of a pressure-sensitive or magnetic tablet left (drawing bar/nod) for drawing the drawing information to be sent to the other party, and a pressure ben or magnetic knife used to draw the drawing information on the drawing section 048. It was composed of a drawing means 04B consisting of Ben.

However, in a telewriting device with such a conventional configuration, there is a display unit 03 for displaying drawing information from the other party to one's own side or from one's own side to the other party, and a display section 03 for displaying drawing information to be sent to the other party. Since the drawing section 04A is constructed separately from each other, there is a drawback that not only a large installation space is required and the manufacturing cost is high, but also the drawn emotion ( There is an inconvenience in use in that when checking the drawing information (characters or figures) or drawing information that is being drawn, the user has to move his/her eyes from the (11th stroke section 04A to the display section 03) each time.

(Object of the Invention) The present invention has been made in view of the existing circumstances of E, IL, and its purpose is to provide a telelighting system that is simpler, more compact, and can be manufactured at a lower cost than in 1. The goal is to provide the equipment.

(Structure of the Invention) In order to achieve the above object, the present invention has the following structure.

That is, in the telewriting device according to the present invention, which has the basic configuration as described at the beginning, the display section for displaying drawing information is constituted by CR'r, and the telewriting device used when drawing the drawing information is configured with CR'r. By configuring the drawing means with a light-receiving type light ben, the CRT screen of the display unit can also be used as a drawing unit for drawing drawing information.
It has the following characteristics.

(Example) Hereinafter, the present invention will be described in detail based on an example shown in the drawings.

1 and 2 show a telewriting device according to a basic embodiment of the present invention, FIG. 1 (1') is a perspective view of its overall appearance, and FIG. 1 (B) is its overall schematic circuit configuration. 1 and 2 show block circuit diagrams showing the detailed circuit configuration thereof, respectively.

In these figures, l is a telephone, 2 is a control unit, 3 is a CRZ-R as a display and drawing unit, 4 is a light-receiving light vent as a drawing unit [), and 5 is a telephone line. The drawing information transmitted from the other party is processed by the controller 2 and displayed on the CRT screen of the display/drawing section 3, and the drawing means (light-receiving type light bench) 4
Accordingly, drawing information manually operated by the user on the CRT screen of the display/drawing section 3 is also processed by the control section 2 and displayed on the CRT screen of the display/drawing section 3. ing. In other words, in the telewriting device of the present invention, if a light-receiving light pen is used as the drawing means 4 instead of the press pen or magnetic pen used in the conventional device, the Jt.
Again, the tablet (drawing pad) used as a drawing unit used in conventional devices is omitted, and instead,
In order to use the screen of a CRT, which originally functions only as a display section, as a drawing section for the light-receiving type light ben as the fit drawing means 4, the CRT is configured as a display section and both sections 3. It is.

The drawing means 4 (light-receiving type light ben) has a built-in light-receiving element that emits a signal when it receives the scanning light on the CRT screen of the display/drawing part 3; The indicated position on the CRT screen of the display/drawing section 3 is calculated by the control section 2 based on the time difference between the time point at which the scanning light starts scanning on the CRT screen and the time point at which the drawing means 4 (light-receiving type light ben) receives the light. It has become so.

By the way, there is a movement toward standardization of telewriting devices both domestically and internationally, and in our country, the Ministry of Posts and Telecommunications announced the Standard Communication Method Office in April 1985. According to this, communication protocols, encoding methods, transmission method 2 display unit costs, etc. have been standardized as listed below.

(f') Drawing transmission iX speed: 300 bits/second ■Modulation method: Frequency shift method (FSK) ■Frequency band used for drawing signal: 1400-2000Hz ■Frequency band used for audio signal = 300-1400Hz and 2100Hz ~34
00Hz (However, in simultaneous communication mode) ■Drawing signal encoding method: Zone encoding method〇Basic functions Nidrace display (function to display drawings) 1 marker display (function to point out any one point), full-screen and Of course, the present invention, such as partial erasure, provides a device that complies with this proposed standard communication method, but it can also be applied to devices using methods other than this method.

The communication modes include a voice-only communication mode that communicates only by voice, a simultaneous communication mode that communicates voice and drawing simultaneously, and a drawing-only communication mode that communicates only by drawing. Since the simultaneous communication mode is used, the explanation will be given here regarding the simultaneous communication mode, and the explanation about the other two modes will be omitted.

Now, FIG. 2 shows a block circuit diagram showing a more detailed circuit configuration of the present telewriting device outlined above.

In the control unit 2, 7 and 8 are filters for transmission signals, and 7 is a drawing frequency band (1400 to 2100Hz).
8 is a band pass filter (BPF) that passes the drawing frequency band (1400 to 2100 Hz), and 9.10 is a filter for the received signal, and 9 is a filter for the audio signal. The drawing frequency band (1400-2100Hz) is used to extract only the audio signal from the received signal in which the signal and drawing signal are combined (multiplexed).
IQ is a bandpass filter (BPF) that passes the drawing frequency band (1400-2100Hz) in order to extract only the drawing signal from the composite (multiplexed) received signal. ,and,
Reference numeral 11 denotes a 300 bit/second modem (modulation/demodulation means), which has a function of demodulating a frequency shift (FSK) modulated drawing signal and a function of inversely modulating it. Further, 12 is a buffer memory that temporarily stores M transmission signals or reception signals. Reference numeral 13 denotes a control circuit, which is connected to an operation button (switch) 21 for carrying out a series of instructions such as monitoring the carrier 1, identifying received signals (device control commands/drawing function commands), switching modes, and sending out drawings. The main functions include detecting signals, generating control signals, outputting signals to the display LED 20 for displaying modes, adding error check codes, checking errors, and sending out drawing signals. 15 is a decoding pattern reproducing circuit for decoding and reproducing the encoded and transmitted drawing signal; 16 is the decoding pattern reproducing circuit 15;
On the contrary, it is an encoding circuit for encoding the drawing signal to be transmitted. Note that this embodiment uses the zone encoding method because it follows the aforementioned standard communication method of the Ministry of Posts and Telecommunications, but other encoding methods may be adopted.
Reference numeral 9 denotes a refresh memory (frame memory), which constitutes a display memory for the CRT serving as the display section 3 and drawing section. 17 is a changeover switch for switching between own drawing and received drawing. Also, 1
Reference numeral 8 denotes a position coordinate detection circuit for detecting a designated position on the C117 screen of the display/drawing section 3 of the drawing means 4 (light-receiving type light ben).

Next, the operation of the telewriting device configured as described above will be explained.

First, dial the telephone 1 to call the other party and connect. Next, select a mode (audio only/simultaneous drawing and audio/drawing only) using the mode changeover switch of the operation button 21. Master/slave settings are required when starting simultaneous mode or drawing mode. This means that when a contention for the right to send drawings occurs at the same time, both sides
This is a procedure established to determine the superiority and inferiority between the two telewriting devices.The normal state of this device is the receiving state (mode), and when you want to send a drawing, you initiate a sending action and the right to send is granted. Transmittal letter B only after being acquired
(mode).

Next, the reception δ and display of drawing information from the other party will be described. A multiplexed signal of an audio signal and a drawing signal sent from the other party is input to a reception band elimination filter (BEF) 9 and a reception band i+11 pass filter (BPF) 10, and the drawing signal is removed by the BEF 9. The voice signal obtained by removing the voice signal is supplied to the telephone 1, while the drawing signal obtained by removing the voice signal at the BPF 10 is supplied to the modem 11. That modem 11'? :! The drawing signal that has been FsK demodulated and reproduced as an original signal is input to the backup memory 12 at the next stage.

This drawing signal includes a device control command for controlling the device and a drawing function command for instructing a drawing function. The control circuit 13 identifies these commands and generates control signals corresponding to them. Since the position information of the i-picture is encoded, it is decoded by the decoding pattern reproducing circuit 15 at the next stage, and then the pattern (dot) is reproduced, and data corresponding to the position information is written into the refresh memory 19.

Next, the transmission of drawing information from the user's side will be described. When manually inputting drawing information on your side, CR of the display and drawing section 3
The position indicated by the drawing means 4 (light-receiving light pen) that is moved on the T screen is detected by the position coordinate detection circuit 18 at an appropriate period (for example, 60 samples/second), and this position detection signal is sent to the encoding circuit 16. After encoding, control circuit 1
Step 3 formats the sending data and stores it in the buffer memory 12.
to human power. Then, the signal sent from the buffer memory 12 is subjected to FSX modulation by the modem 11, and then passed through a transmission band-pass filter (BPF) 8, and the passed drawing signal and the transmission band-elimination filter (BEF) 7 are passed through. The synthesized voice signals are combined (multiplexed) and sent to the telephone line 5. On the other hand, the drawing information on the own side is
In order to display it on the RT screen, the position coordinate detection circuit 18
The output signal is written to the refresh memory 19 via the changeover switch I7.

By the way, the display and drawing unit 3 receives the message from the other party.
It is often the case that you want to add something to the drawing displayed on the CRT screen of your computer. You can overwrite drawing information from your side. That is, at first, the changeover switch 17 is set to the decoded pattern reproduction circuit 15 side, and after writing the drawing information from the other party to the refresh memory 19, the changeover switch 17 is switched to the decoded position coordinate detection circuit 18 side. , it is sufficient to write the drawing m-information from the user's side into the refresh memory 19. In addition, at this time, the changeover switch 1
7 is switched depending on whether the mode is reception mode or transmission mode.

When the drawing information from the other side and the drawing information from the own side are displayed simultaneously on the CRT screen of the display/drawing unit 3, the drawing information from the other side and the drawing information from the own side are displayed simultaneously. It would be very convenient if they could be visually distinguished by, for example, different display colors or display brightness.

FIG. 3 shows an application example in which drawing information from the other party and drawing information from one's own side are displayed in different colors on the CRT screen of the display/drawing section 3.

That is, FIG. 3(a) shows a configuration in which drawing information from the other party is written to the glue refresh memory 19a exclusively for the other party, and lif image information from the own side is written to the refresh memory 19b exclusively for the own side. At the same time, the output from the other party's refresh memory 19a is input only to R of the RC and B inputs in the display and drawing section 3, while the output from the own side refresh memory 19b is input to the display and drawing section 3. By configuring the RGB input so that all R, G, and B are input, on the CRT screen of the display/drawing unit 3, one seedling information from the other party is displayed in red, and information from the own side is displayed in red. In this example, the drawing information is displayed in white.

In addition, FIG. 3(b) shows the RG in the display section/drawing section 3.
Three refresh memories 19R, 19G, and 19B are provided corresponding to R, G, and B of the B input, and drawing information from the other side is written only to the R refresh memory 19R, while drawing information from the own side is written only to the R refresh memory 19R. By configuring the Jyouko U to write to all the refresh memories 19R, 19G, and 19B, it is possible to write information from the other party on the CRT screen of the display/drawing unit 3, as in the case of FIG. 3(A). In this example, the drawing information from the user's side is displayed in red, and the drawing information from the user's side is displayed in white.

FIG. 4 shows an application example in which drawing information from the other party and drawing information from one's own side are displayed on the CRT screen of the display/drawing section 3 at mutually different luminances.

That is, the drawing information from the other party is stored in the refresh memory 19.
The drawing information from the own side is written to both the fresh memory 19 and the contrast memory 22, and by outputting only the drawing information from the own side from the contrast memory 22,
By configuring to control the output level of only the drawing information from the own side outputted from the refresh memory 19 (low brightness in this example), the display unit/drawing unit 3
This is an example in which drawing information from the other party is displayed with high brightness on the CRT screen, and drawing information from the user's side is displayed with low brightness (for example, half brightness).

(Effects of the Invention) As is clear from the detailed description above, according to the telewriting device according to the present invention, the display unit for displaying drawing information is configured with a CRT, and the display unit used when drawing the drawing information By configuring the drawing means as a light-receiving light pen, the CR'T screen of the display section can also be used as a drawing section for drawing drawing information. ) can be omitted, making the entire device extremely simple and compact, which is extremely advantageous in terms of installation space and manufacturing costs.
In addition, since the drawing surface and the display surface are the same CRT screen, the image information f1 drawn with the light-receiving light pen on the CRT screen! The locus (trace) of characters (characters and figures) is displayed as is on the CRT screen, and therefore, unlike conventional methods, the user has to shift the eye between the drawing section and the display section. It can completely eliminate the inconvenience, and furthermore, when partially erasing or modifying the drawing once drawn on the CRT screen,
When setting the initial position of the pen, which is the drawing means, in conventional devices, the tablet (drawing pad) is set while looking at the display.
In the case of the device of the present invention, the initial position of the pen can be set extremely easily. Excellent effects are demonstrated.

[Brief explanation of drawings]

1 and 2 show a basic embodiment of a telewriting device according to the present invention, FIG. 1(A) is an external perspective view showing the overall schematic configuration, and FIG. 1(B) is a schematic circuit configuration thereof. FIG. 2 is a block circuit diagram showing its detailed circuit configuration, and FIGS. 3 and 4 each show applied examples, and FIG. Figure 3 (b) is a block circuit diagram of the main part showing one example of adding a difference in display color, Figure 4 is a block circuit diagram of the main part showing another example of adding a difference in display color. FIG. 5 is a block circuit diagram of a main part showing an example of a case where a An external perspective view showing the configuration is shown, and FIG. 5 (b) is a block circuit diagram showing the schematic circuit configuration.・・Control unit, 3・・・・・・Display unit and drawing unit (CRT), 4・
・・・・・・Drawing means (light receiving type light pen), 5.
········telephone line.

Claims (1)

[Claims] A control unit that is interposed between the telephone and the telephone line and processes voice information and drawing information transmitted and received via the telephone line, and a display unit that displays the drawing information processed by the control unit. , a telewriting device comprising a drawing section for drawing drawing information to be transmitted to the other party, and a drawing means used when drawing the drawing information on the drawing section, a display section for displaying the drawing information. is constructed of a CRT, and the drawing means used to draw the drawing information is constructed of a light-receiving light pen, so that the CRT screen of the display section is configured to double as a drawing section for drawing the drawing information. A telelighting device characterized by: