JPH08339257A - Digitizer - Google Patents

Abstract

PURPOSE: To complement and output the data of the disconnection part of a tablet or the like of a digitizer when pen input is performed to the disconnection part by detecting and memorizing the part. CONSTITUTION: The tablet 1 is scanned in an X-Y direction from a tablet/ conductor plate controller 3 through an X side driving part 4 and a Y side driving part 5 and pulse signals are impressed. The induction signals of the corresponding electrode of a conductor plate 2 are detected in a conductor signal detection part 6 and a disconnection position is judged in a control part 7 and recorded in a memory part 8. The tablet is traced with a pen 9, signals induced in the pen are noise-eliminated in a filter 10, the signals are detected in a signal detection part 11 and converted to digital data in an A/D conversion part 12, a pen-inputted coordinate position is discriminated in the control part and the data are processed to a specified color, line kind and thickness, etc., in a data processing part 13. When input is performed to the disconnection part, complementary data are generated based on the data inputted before and after in a complementary data generation part 14 and the data from the data processing part are complemented in a data complementing part 15 and outputted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a digitizer device for outputting information pen-input to a tablet as digital data, and relates to a device which complements and outputs data at the disconnection point when the pen-input is made at the disconnection point of the tablet. .

[0002]

2. Description of the Related Art In an electrostatic digitizer device, for example, as shown in FIG. 3, a conductive pattern is formed on a glass plate of a tablet 21 in a matrix in the X and Y coordinate axis directions, and a tablet controller 22 is provided. Pulse from the Y-side drive unit 24 in the X-axis direction, and the Y-side drive unit 24.
Axes are sequentially scanned and applied, the pen 25 is touched on the tablet 21 to pick up this pulse, the signal from the pen 25 is input to the filter 27 to remove noise, etc.
The signal is detected by 28, the A / D conversion unit 29 converts the signal into a digital signal having a required number of bits, and this signal is input to the data processing unit 30 via the control unit 26, and the electrode position (in FIG.
Etc.) between the electrodes (a, b, c, etc. in FIG. 4) based on the data of
Data is generated, the coordinate position input by the pen is determined based on the signal from the tablet controller 22, and the display position specified by the computer device, the line type / thickness, etc. are determined at the input specified coordinate position. Although the processed data is output via the output unit 31, if there is a disconnection point on the electrode plate of the tablet 21, etc., no signal is detected when a pen is input at this point, and the output data at this point is output. Will be blank. In order to avoid this, for example, it is necessary to trace the tablet on the tablet with a pen to find a disconnection point and avoid penetrating this point to perform pen input.

[0003]

SUMMARY OF THE INVENTION In view of the above, the present invention scans the surface of a tablet to detect a disconnection point of the tablet in advance, and when a pen input is made at the disconnection point, it is input before and after this point. Complementary data is generated based on the information obtained and is output together with the data input by the pen.

[0004]

In order to solve the above problems, the present invention provides a pen input tablet in which a plurality of electrodes are arranged along a coordinate axis and each electrode is sequentially scanned to apply a required pulse signal. And a conductor plate which is arranged close to and opposite to the tablet and which is provided corresponding to each electrode of the tablet and which scans the electrodes of the tablet in correspondence with the scan of the electrodes of the tablet and outputs a signal induced in the electrodes. Disconnection detecting means composed of a conductor signal detecting portion for detecting a signal from the conductor and a memory portion for recording data from the conductor signal detecting portion, and when a pen is input at the disconnection position detected by the disconnection detecting means. (EN) A digitizer device comprising data complementation means for generating complementary data and complementing and outputting data input by a pen.

[0005]

With the above construction, in the digitizer device according to the present invention, a plurality of electrodes arranged along the coordinate axes of the tablet are sequentially scanned to apply a required pulse to the tablet so as to be close to and face the tablet. The electrode corresponding to each electrode of the tablet provided on the conductor plate arranged by scanning is scanned in synchronization with the scanning of the electrode of the tablet, the signal induced in the electrode of the conductor plate is extracted, and the induction signal is output. If the tablet is recorded as a wire break at the position of the electrode that is not touched, and if a pen is input at the wire break position, complementary data for the wire break location is generated based on the data input before and after the wire break position, and pen input is performed. Output together with the selected data.

[0006]

Embodiments of the digitizer device according to the present invention will be described in detail below with reference to the drawings. FIG. 1 is a block diagram of essential parts of an embodiment of a digitizer device according to the present invention. In the figure, 1 is a tablet and 2 is a conductor plate.
As shown in, the electrodes are formed on the tablet 1 and the conductor plate 2 in a matrix form at required intervals in the X-axis direction and the Y-axis direction. Reference numeral 3 denotes a tablet / conductor plate controller, which connects the electrodes of the tablet 1 and the conductor plate 2 to each other during disconnection detection operation.
At the same time, scanning is performed in the X-axis direction via the X-side drive unit 4 and in the Y-axis direction via the Y-side drive unit 5, and a pulse signal is applied to each electrode of the tablet 1. At the time of pen input operation, only the tablet 1 is scanned and a pulse signal is applied to each electrode. 6 is a conductor signal detection part,
The signal induced in each electrode of the conductor plate 2 is detected, the detected signal is input to the control unit 7, and the control unit 7 determines the position (coordinates) where the signal is not detected by the conductor signal detection unit 6. The determination is made based on the scan information from the tablet / conductor plate controller 3, and the result is recorded in the memory unit 8.

Reference numeral 9 denotes an input pen. A signal generated by a pulse signal applied to each electrode of the tablet 1 by tracing on the tablet 1 is induced in the pen 9 via a capacitance between the tip of the pen 9 and the tablet 1. It Reference numeral 10 is a filter that removes noise and the like from the signal from the pen 9. 11 is a signal detector,
The signal picked up by the pen 9 is detected. 12 is A / D
The converter converts the analog signal from the signal detector 11 into required bit data. 13 is a data processing unit, A / D
Calculation is performed based on the signal from the conversion unit 12, and data of the position of the electrode (FIG. 4, etc.) input in the pen and the middle of the electrode (a, b, c etc. of FIG. 4) are generated. At the same time, it processes the data such as the required display color, line type, and thickness based on a signal from a setting unit (computer device or the like) such as drawing (not shown). 14 is a complementary data generator, which
When the scan position of the signal of the conductor plate controller 3 matches the disconnection position read from the memory unit 8, the data processing unit
Complementary data is generated using the data before and after the disconnection position input from 13. Reference numeral 15 is a data complementing unit, which is a complementary data generating unit for the non-data portion of the data from the data processing unit 13.
The data from 14 is complemented and output via the output unit 16.

Next, the operation of the digitizer device according to the present invention will be described by first detecting the disconnection of the tablet 1. As shown in FIG. 2, electrodes are formed on the tablet 1 and the conductor plate 2 at required intervals in the X-axis direction and the Y-axis direction, respectively, and the conductor plate 2 is disposed close to and facing the tablet 1. A pulse signal is applied from the tablet / conductor plate controller 3 to each electrode of the tablet 1 by scanning in the X-axis direction via the X-side drive unit 4 and in the Y-axis direction via the Y-side drive unit 5, respectively. Each electrode of the conductor plate 2 is scanned in synchronization with the scanning, and the signal induced in each electrode of the conductor plate by the pulse signal applied to the tablet 1 is detected by the conductor signal detection unit 6. Conductor signal detector 6
From the tablet / conductor plate controller 3 in which no conductor signal is detected,
That is, the disconnection position of the tablet 1 is determined, and the data of the disconnected coordinate position is recorded in the memory unit 8. Conductor plate 2
As for the level of the signal induced in the electrode of the tablet 1, since the signals of substantially the same level are induced in the respective electrodes of the conductor plate 2 by disposing the tablet 1 and the conductor plate 2 at equal intervals.
When there is a disconnection point in the conductor plate 2, since the level of the signal induced in the electrode of the conductor plate 2 facing the disconnection point becomes a low value, the conductor signal detection unit 6 sets an appropriate signal level, It is determined that the tablet 1 at the position at which the signal from the signal is below this signal level is broken.

The pen input operation is performed as follows.
That is, with the tablet / conductor plate controller 3,
Each electrode of the tablet 1 is scanned in the X-axis direction and the Y-axis direction via the X-side drive unit 4 and the Y-side drive unit 5, and a required pulse signal is sequentially applied to each electrode. By tracing the tablet 1 with the pen 9 and inputting a drawing (character or line, etc.), a signal based on a pulse signal applied to the electrode via the capacitance between the tip of the pen 9 and the electrode of the tablet 1 is applied to the pen. 9 is induced. This signal is input to the filter 10, noise and the like are removed, and the signal is input to the signal detection unit 11 to detect the signal. As shown in FIG. 4, the signal detected by the signal detector 11 has the highest signal level at the electrode closest to the pen tip, and the next highest level at the electrodes on both sides (front and rear) of the electrode and the signal at the electrode. Show. The signal from the signal detector 11 is input to the A / D converter 12, sampled at an appropriate frequency, and converted into the required bit data. Then, the data from the A / D conversion unit 12 is input to the data processing unit 13 via the control unit 7, and the position of the electrode (FIG. 4, etc.) and the middle of the electrode (FIG. (A to c, d to f, etc.) and at the same time are processed into a required display color, line type or thickness based on a drawing designation signal (not shown). When the tablet 1 has disconnection points, the signal from the pen 9 is cut off at this point, but when adjacent electrodes are not disconnected, an induction signal is generated by the signals applied to these electrodes (for example, as shown in FIG. When the position of 4 is disconnected, and the induced signal due to the signal applied to the electrode of is detected), the position of the pen input can be determined by comparing the levels of the induced signals.

The position input by the pen is determined by the controller 7 based on the scan position (coordinates) from the tablet / conductor plate controller 3. The position input by the pen is compared with the data read from the memory unit 8 by the control unit 7,
If it matches the disconnection position, the complementary data generation unit 14
Complementary data is generated using the data before and after the disconnection position input from the data processing unit 13. That is, the pen 9
When the mouse is continuously moved on the tablet 1, for example, when the data input before and after the disconnection position is the same, the same data as the data before and after the disconnection position is generated, and the data input before and after the disconnection position is different. In the case of data, the average value of the data before and after is generated (data before and after is added and divided by the number of data added), or when the same data is input continuously before and after the disconnection position. Generates the same data as before and after the disconnection position.If the same data is not continuously input before and after the disconnection position, add the required number of data before and after the disconnection position and divide by the number of added data. To generate it. Then, the data from the complementary data generating unit 14 is input to the data complementing unit 15, the disconnection location of the data from the data processing unit 13 is complemented, and the data is output via the output unit 16.

Further, since the disconnection position of the tablet 1 is recorded in the memory section 8, a program for inputting a drawing or the like while avoiding the disconnection point may be created based on the data from the memory section 8. .

[0012]

As described above, according to the digitizer device of the present invention, the disconnection position of a tablet or the like can be detected in a short time by scanning the electrodes of the tablet or the like, and the pen input can be made at this disconnection point. If done,
This is to supplement and generate appropriate data based on the data input before and after the disconnection point, and has an advantage that the loss of data due to the disconnection of a tablet or the like can be made almost inconspicuous.

[Brief description of drawings]

FIG. 1 is a block diagram of a main part of an embodiment of a digitizer device according to the present invention.

FIG. 2 is an explanatory diagram of a tablet and a conductor plate.

FIG. 3 is a principal block diagram of an example of a conventional digitizer device.

FIG. 4 is a diagram for explaining the operation of the digitizer device.

[Explanation of symbols]

 1 tablet 2 conductor plate 3 tablet / conductor plate controller 4 X side drive unit 5 Y side drive unit 6 conductor signal detection unit 7 control unit 8 memory unit 9 pen 11 signal detection unit 12 A / D conversion unit 13 data processing unit 14 complement Data generator 15 Data complementer

Claims (7)

[Claims] 1. A tablet for pen input which has a plurality of electrodes arranged along a coordinate axis and sequentially scans each electrode to apply a required pulse signal, and a tablet which is arranged close to and opposite to the tablet. A conductor plate that outputs the signal induced by the electrode by scanning the electrode provided corresponding to the electrode corresponding to the scanning of the electrode of the tablet, the conductor signal detection unit that detects the signal from the conductor plate, and the conductor signal detection Disconnection detection means comprising a memory section for recording data from a section,
A digitizer device comprising: data complementation means for generating complementary data when a pen input is made at a disconnection position detected by the disconnection detection means, and complementing and outputting the pen-input data. 2. The digitizer device according to claim 1, wherein the disconnection detecting means records the electrode position, where the induced signal is not detected by the conductor signal detecting unit, as the disconnection position of the tablet in the memory unit. . 3. The data complementing means compares the signal from the input pen with the data read from the memory section, and when the position of the input pen coincides with the disconnection position, generates the necessary complementary data, and inputs the pen. The digitizer device according to claim 1 or 2, wherein the digitized data is complemented and output. 4. The data complementing means generates complementary data based on the data input before and after the disconnection position when the pen is continuously moved on the tablet, and outputs it together with the data before and after the disconnection position. The digitizer device according to claim 1, 2 or 3, wherein the digitizer device comprises: 5. The complementary data generates the same data as the preceding and following data when the data input before and after the disconnection position is the same, and when the data input before and after the disconnection position is different data. The digitizer device according to claim 4, wherein the data before and after is added to generate data divided into two. 6. The complementary data generates the same data as the preceding and following data when the same data is continuously input before and after the disconnection position, and the same data is continuously generated before and after the disconnection position. 5. The digitizer apparatus according to claim 4, wherein a required number of data before and after the disconnection position are added and divided by the number of data to generate when not input. 7. The digitizer device according to claim 1, wherein a program for inputting data is created while avoiding a disconnection position recorded in the memory section.