JPS60209829A - Pattern information input device - Google Patents

Abstract

PURPOSE:To improve the operability and to make a device simple and low in cost by judging the device to be in the partial erase mode to erase corresponding pattern information when coordinate information is inputted with a writing tool in the storage part. CONSTITUTION:A terminal equipment is provided with a pattern information input device body 10, a pattern information display device body 20, and a subscriber's device 30, and this input device body 10 consists of a pattern information input panel 11, a coordinate information detecting part 12, and an operation part 13. The subscriber's device 30 consists of an input interface circuit 31 for output signals from said operation part 13, a control circuit 34, etc., and the control circuit 34 monitors not only presence/absence of overall erase input but also the output of a pen detector 7 when waiting inputs. If the overall erase input is absent and the output of the pen detector 7 in a pen storage part 6 is turned on, the mode is switched to the information input mode; but if this output is turned off, the mode is switched to the partial erase mode. In case of the partial erase mode, coordinate information is stored in a control data memory 35, and contents of a storage area in a picture memory 33 corresponding to the erase range is erased.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an improvement in a graphical information input device used, for example, in a remote conference system using a communication line.

(Technical Background of the Invention) In recent years, a plurality of terminals each having a graphical information input device and a graphical information display device have been developed. connect the equipment via a communication line,
A system has been proposed in which graphic information is transmitted and displayed between terminal devices. FIG. 1 is a schematic configuration diagram of the above-mentioned terminal device, in which reference numeral 1 indicates a graphic information input device main body, 2 a graphic information display device main body, 3 a home device, and 4 a communication line such as a telephone line. In this type of system, for example, when graphic information is input using the graphic information input device main body 1 of an arbitrary terminal device,
This graphic information is displayed on the display device main body 2 by the in-home device 3, and is also transmitted to another terminal device in a remote location via the communication line 4 and displayed on the display device main body, and the graphic information of this terminal device is input. By sending the graphical information input on the main body of the device to the terminal device via the communication line and displaying this graphical information in an overlapping manner on the main body 2 of the graphical information display device,
This allows remote conferences to be held between multiple terminal devices.

By the way, conventional graphical information input devices used in such systems generally convert the writing trajectory of graphical information into coordinate information by detecting the pressure applied when writing with a pen, and then input the information. When using multiple colored pens, for example, each pen 5a, 5b, 5c as shown in FIG.
By providing an accommodating part 6 for each accommodating part 6, installing a detector 7 in this accommodating part 6, and detecting the presence or absence of a pen by this detection s7,
The color used to determine which graphic information has been input is determined. In addition, a so-called blackboard eraser is used to erase figures written on the input screen, but this blackboard eraser is also provided with a storage section with a detector, and when the detector detects that there is only a blackboard eraser, It is determined that it is in partial erase mode, and
In this state, the area corresponding to the entered coordinate information is erased. Therefore, the operator can input graphic information in the desired color by selecting the desired pen and writing the graphic on the input surface, or by picking up the blackboard eraser and inputting information with all the pens housed in the storage section. By wiping the surface, you can erase only the desired area. It should be noted that if all of the input graphic information is to be erased, it can be erased by operating an entire erase switch provided on an operation panel (not shown).

[Problems with background technology]

However, such conventional devices are designed to determine whether the mode is input mode or partial erase mode by providing a housing section with a detector for blackboard eraser and detecting whether or not there is a blackboard eraser in this housing section. I have to.

Therefore, when inputting a graphic with a pen, graphic information cannot be input unless the blackboard eraser is securely accommodated in the storage section. In general, a blackboard eraser is used frequently, and it is very troublesome for the operator to have to return it to a predetermined position each time, which is not desirable in terms of operability.

Furthermore, since the blackboard eraser is to be housed in the storage section, it must be of a predetermined type that is compatible with the shape of the storage section and the detector.As a result, the use of commercially available blackboard erasers is limited, and There were drawbacks such as a complicated configuration of the blackboard eraser detector.

[Purpose of the invention]

The present invention makes it possible to determine the input mode and the partial erase mode without limiting the placement location and shape of the blackboard eraser, thereby improving operability, simplifying the configuration of the device, and reducing the cost. The purpose is to provide a graphic information input device.

[Summary of the invention]

In order to achieve the above object, the present invention determines that the information manual mode is in effect when the writing instrument detecting means detects that no writing instrument is stored in the accommodating section, and converts the coordinate information detected in this mode state into a graphic image. When the coordinate information is recognized as coordinate information and the writing instrument detecting means detects that there is a writing instrument in the accommodation part, it is determined that the partial erase mode is in effect, and out of the graphic coordinate information that has already been input, The graphic information corresponding to the area specified by the coordinate information detected in this mode is erased.

(Embodiment of the Invention) FIG. 3 is a circuit block diagram of a terminal device using a graphic information input device according to an embodiment of the present invention, in which 10 is the main body of the graphic information input device, and 20 is the main body of the graphic information display device. ,3
0 indicates an in-home device.

The graphic information input device main body 10 includes a graphic information input surface 11 using, for example, a pressure-sensitive sheet, and a coordinate information detection unit 12 that detects the trajectory of a graphic drawn on the input surface 11 or the trajectory of a blackboard eraser as coordinate information. It is comprised of an operation section 13 equipped with a full erase switch, each pen detector, etc.

On the other hand, the home device 30 includes an input interface circuit 31 that inputs an output signal from the operation section 13 of the graphic information input device main body 10, an encoding interface circuit 32 that encodes coordinate information from the coordinate detection section 12, An image memory 33 that stores the coordinate information encoded by the encoding interface circuit 32, and the input interface circuit 3
1 and a control data memory 35 that stores control data from a control circuit (CPU) 34 to be described later; and a modem () that modulates encoded coordinate information stored in the image memory 33 and sends it to the communication line 4. The modulation/demodulation unit) 36 decodes the encoded coordinate information from the image memory 33 and stores it in the internal refresh memory to display the graphic information display device main body 2.
It is composed of a decoding interface circuit 37 for outputting and displaying the data to 0, and a control circuit (CPU) 34.

The CPU 34 has a microprocessor as its main control unit, and as shown in FIG. 4, performs communication control, display control, input control, and erasure control functions.

Note that the graphic information display device main body 20 is composed of, for example, a CRT display.

Next, the operation of the apparatus configured as above will be explained. The CPU 34 of the home device 30 sometimes enters the fifth input standby state.
As shown in Figure (a), the presence or absence of full erase input is monitored and the output of the pen detector is monitored, and when there is no full erase input and the output of the pen detector is on, the information input mode is entered. When the pen detector output is off, the mode shifts to partial erase mode.

That is, in the case of the information input mode, first, the screen shown in FIG. 5(a)
As shown in FIG. 3, input of coordinate information is first monitored, and when coordinate information arrives, it is determined that the mode is information input mode, and this coordinate information is stored in the image memory 33. In addition, if the coordinate information does not arrive, will the above full deletion input be supervised? J! Return to (initial state). Then, the coordinate information of the stored image memory 33 is read out and output to the decoding interface circuit 37, and this coordinate information is displayed on the graphic information display device main body 20, and is also supplied to the modem 36 and is connected to the communication line from the modem 36. Send to 4. Finally, input of coordinate information is monitored, and if the coordinate information continues to arrive, this coordinate information is stored in the image memory 33, and if it is interrupted, the initial monitoring state is returned. Thereafter, as long as the output of the pen detector is on, the above operation is repeated to input graphic information.

Now, in the case of the partial erase mode, first, as shown in FIG. control data memory 35 as information specifying the
to be memorized. Note that if coordinate information does not arrive, the process returns to the initial monitoring state. Then, while monitoring the amount of change in the coordinate information, this coordinate information is stored in the control data memory 35 as long as the coordinate information arrives continuously, and when the amount of change in the coordinate information reaches a preset N or more, the coordinate information is stored in the control data memory 35. The coordinate information of the control data memory 36 is read out to set an erasing range, and the storage area of the image memory 33 corresponding to this erasing range is erased. Then, this erased coordinate information is read out from the image memory 33 and sent to the decoding interface circuit 37 and the modem 3.
6 and is displayed on the graphic information display device main body 20 and transmitted to the communication line 4. On the other hand, Jin and CP whose coordinate information is interrupted before the amount of change in the coordinate information is less than N.
L134 determines that the coordinate information does not set an erasure range and returns to the initial monitoring state. That is, in the partial erase mode, the CPU 34 does not recognize this as an erase designation and does not perform erasing unless a certain amount or more of the erase area is specified consecutively. Performing deletion for the first time. As a result, even if you accidentally touch an area that does not need to be erased, this area will not be erased immediately.

Moreover, once the CPU 34 performs the erase operation, the CPU 34 performs the erase operation as shown in FIG.
As shown in b), the value of N is changed to the second amount, and thereafter this second ω is compared with the amount of change in the coordinate information. here,
This second position is set to be smaller than the first amount set initially. Therefore, once erasing is started, the coordinate information is erased every time the coordinate information changes by a small amount.

As a result, more natural erasing can be performed in response to the operator's erasing operation. The above operations are performed until the input of coordinate information is interrupted and the value of N returns to the first period, which is the initial value.

FIG. 6 is for explaining the above-described partial erasure operation. Immediately after the start of erasure, from the starting point SO'/Jν to the point S1,
In other words, erasure is not performed until the movement amount (ΔX1, ΔYl) corresponding to the first amount is detected, and the area SO to S1 is erased when the erasure coordinate information reaches 81. Further, from S1 onward, erasure is performed every time the object moves by an amount (ΔX2.ΔY2) corresponding to a second amount smaller than the first amount.

In the full erase mode, the entire storage area of the image memory 33 is erased when the full erase input arrives as shown in FIG. 5(a). After this erasure, the image memory 3
3 is read out and displayed on the graphic information display device main body 20, and is also sent to the communication line 4 via the modulation section 36. Further, in the information manual mode from the partner device, the coordinate information obtained via the modem 36 can be displayed on the graphic information display device main body 20 superimposed on the displayed coordinate information, and the coordinate information can be partially displayed based on the erased coordinate information. Can be erased or completely erased.

As described above, according to this embodiment, since the partial erase mode is determined based on the absence of full erase input and the detection output of each pen detector, the blackboard eraser housing and the detector are completely unnecessary, and as a result, the blackboard Since there is no need to return the eraser to its predetermined position, the erasing operation becomes easier. Further, the shape and size of the blackboard eraser can be arbitrarily selected. Furthermore, since a housing section and a detector with complicated configurations can be made unnecessary, the configuration of the apparatus can be simplified accordingly. Furthermore, this allows the device to be made at a lower cost.

Note that the present invention is not limited to the above embodiments. For example, in the above embodiment, the mode is determined by the CPU of the home device 130, but the
The determination may be made by logically processing the detection signal of each detector within 0 using a logic circuit. Further, although the image memory 33 was provided in the above embodiment, this image memory 33 is omitted and the output of the encoding interface circuit 32 is directly input to I[
It may be input to the @ interface circuit 37 and modem 36, displayed on the graphic information display device main body 20, and transmitted via the communication circuit 194. This eliminates the need for a large-capacity additional image memory 33, making it inexpensive and compact, and allows the use of a low-speed modem. In addition, the circuit configuration, lllJIIl means, etc. can be modified in various ways without departing from the gist of the present invention.

〔Effect of the invention〕

As described in detail above, the present invention determines that the information input mode is in effect when the writing instrument detecting means detects that no writing instrument is accommodated in the accommodation section, and converts coordinate information detected in this mode state into figure coordinates. When the coordinate information is input manually while the writing instrument detecting means detects that there is a writing instrument in the accommodating part, it is determined that the mode is partial erasure mode, and this This is to erase the graphic information corresponding to the area specified by the coordinate information detected in the mode state.

Therefore, according to the present invention, it is possible to determine the input mode and the partial erase mode without limiting the placement location and shape of the blackboard eraser, thereby improving operability, simplifying the configuration of the device, and reducing costs. It is possible to provide a graphical information human-powered device that can be priced inexpensively.

[Brief explanation of the drawing]

1 and 2 are for use in explaining the background art; FIG. 1 is a schematic configuration diagram of a terminal device, FIG. 2 is a perspective view showing the configuration of a pen accommodating section, and FIGS. The figures are for explaining one embodiment of the present invention, and FIG. 3 is a circuit block diagram of the graphic information input device, FIG. 4 is a block diagram showing the function of the control circuit of the home device, and FIG. ) and (b) are flowcharts used for explaining the operation, and FIG. 6 is a schematic diagram for explaining the partial erase operation. DESCRIPTION OF SYMBOLS 10... Graphic information input device main body, 11... Graphic information input surface, 12... Coordinate detection unit, 13... Operation unit, 2
0...Graphic information display device main body, 30...In-house device,
31... Input interface circuit, 32... Encoding interface circuit, 33... Image memory, 34...
・tIIJ111 circuit (CPLJ), 35...IIJ
Ij data memory, 36...modem, 37...decoding interface circuit. Applicant's agent Patent attorney Takehiko Suzue Figure 1 Figure 2 Figure 6 Figure 4 Figure 5 (a) Figure 5 (b) Figure 6 Continued from page 1 [Phase] Inventor Tsuru 1) Yuzo Invention Fukushige Ogawa @ inventor Toshiharu Takizawa

Claims (1)

[Scope of Claims] (1) In a graphic information input device that detects handwriting of graphic information written in an input area as coordinate information, the writing instrument is provided in a accommodating part of a writing instrument for writing the graphic information in the input area, and the writing instrument is A writing instrument detecting means for detecting whether or not a writing instrument is stored in the storage section, and when the detection means detects that no writing instrument is stored in the storage section, an information input mode is set, and detection is performed in this information input mode state. When coordinate information is input in a state where the input control means recognizes the coordinate information as graphic coordinate information and the writing instrument detection means detects that there is a writing instrument in the storage section, the partial erase mode is activated, A graphic information input device comprising: erasing control means for erasing graphic coordinate information corresponding to a region specified by the coordinate information detected in the partial erasure mode state among the graphic coordinate information detected in the partial erasure mode state. (2) The erasure control means does not erase the figure coordinate information until the coordinate information detected in the partial erasure mode changes by more than a predetermined first m from the initially input value, and The graphical information input device according to claim 1, which erases the graphical coordinate information corresponding to the area specified by the coordinate information when the area specified by the coordinate information is exceeded. The figure coordinate information is not deleted until the coordinate information detected in the mode state changes by more than a predetermined first m from the initially input value, and when the coordinate information is placed on the first position, the coordinate information is The graphical coordinate information corresponding to the area specified by the information is erased, and after this erasing is started, every time the amount of change in the coordinate information changes by a second amount set to a smaller amount than the first amount. The graphic information input device according to claim 1, which erases graphic coordinate information of an area specified by the coordinate information.