JPH08234907A - Data processor - Google Patents

Abstract

PURPOSE: To evade the detection of a depression point based upon hand operation that a pen input person does not desire by storing the relative position relation between a pen and the depression point of a hand gripping the pen and judging whether or not a depression point detected on the basis of this relative position relation is detected by the hand. CONSTITUTION: The absolute values (X, Y) of coordinate data detected by the hand in a hand operation state based upon coordinate data detected at the pen tip are previously found and stored in a data storage part 7b. A CPU 8 adds the relative value X stored in the data storage part 7b to a coordinate X when coordinates (Xa, Ya) and (Xb, Yb) are detected, adds the relative value Y to the coordinate Yb when the value is approximate to the coordinate Xa, and checks whether the value is not approximate to the coordinate Ya. When the value is approximate, the possibility that the (Xa, Ya) are coordinate data detected by the contacting between the hand and a tablet and the (Xb, Yb) are coordinate data detected by pen-down operation is high, so the (Xa, Ya) are regarded as ineffective data.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data processing device such as a pen input type personal computer, a word processor, an electronic notebook, and a portable terminal device, and more particularly,
The present invention relates to a data processing device having a pressure sensitive tablet system.

[0002]

2. Description of the Related Art Here, a personal computer will be described as an example. Conventional personal computers
As shown in FIG. 5, a keyboard control unit 101 that controls input from a keyboard, a pen control unit 102 that controls input from a pen, a tablet control unit 103 that analyzes the operation of the pen on the tablet, and a tablet. The pressure detection unit 104 that detects the pressing of the pen on the above, and the disk control unit 1 that controls access to the disk device in which the application program and driver to be used are stored.
05, a display control unit 106 for displaying various data and necessary windows on the display device, and a memory 10 for storing various data input by a keyboard or a pen, commands, data read from the disk device, and the like.
7, the control units 101 to 106 and the memory 107
And a central processing unit (CPU) 108 for controlling the.

The memory 107 has a program execution unit 107 for executing an application program.
a is included.

In the case of a tablet such as an LCD integrated digitizer system, the functions of the tablet controller 103 and the tablet are included in the display controller 106 and the display device.

When the pen is pressed against the tablet, the coordinate data detected by the pressure detection unit 104 becomes
It is displayed on the display device in the form of a cursor or the like.

As a method of detecting the pressure at the time of pen input, the depression of the pen tip portion of the pen can be detected, or the method described in Japanese Patent Laid-Open No.
As described in JP-A-127810, there is a method in which a pressure signal output from a tablet is detected by a pressure detection unit.

In order to provide a comfortable pen input environment, some methods for eliminating erroneous coordinate data have been proposed. In the method disclosed in Japanese Patent Laid-Open No. 3-55682, a character shape is expressed. A method has been proposed in which a vector is extracted and points that do not match the vector are eliminated.

The above description is not limited to a personal computer, but is similarly applied to a word processor, an electronic notebook, an information device such as a portable terminal device, and the like, using a predetermined pen on the surface of a tablet or a display screen. The detected coordinate data can be displayed on the display device by pressing the pen against the like.

[0009]

When attempting to perform pen input in a pen input environment in the same manner as when writing characters using a pencil and paper, attach a pen for input to a particularly large tablet. It is natural for the hand to hold.

In the prior art, as shown in FIG. 6, when the pen 112 is operated on the tablet 111, the pen 11
2 and the pressing point between the tablet 111, the hand and the tablet 11
Two points may be detected, such as the pressed point with 1. In this case, the average value of the detected coordinate data is displayed as coordinate data, or basically, the point detected by the pen tip touching the tablet is displayed as coordinate data. Depending on the timing, the point detected by the hand touching the tablet is displayed as coordinate data, and as a result, incorrect coordinate data may be displayed.

According to the present invention, the relative value between the coordinate data detected by the pen tip and the coordinate data detected by the hand, which has been calculated in advance, is used to perform pen input with the hand on the tablet. At that time, the purpose is to invalidate the coordinate data detected by the hand and provide a comfortable character input environment.

[0012]

The present invention has been made for the purpose of solving the above-mentioned problems. In the invention according to claim 1, the pen tip is brought into contact with the tablet by operating the tablet with a pen. In a data processing device that stores and displays detected pressing points as coordinate data, stores a relative positional relationship between two pressing points detected with a pen and a hand holding the pen on the tablet. When the two registration points and the two pressing points are detected during the input, the one of the two pressing points touches the tablet based on the relative positional relationship stored in the registration section. Judgment means for judging whether or not it is detected, and invalidating the coordinate data of the pressed point which is judged to have been detected by holding the tablet by the judgment means. Is a data processing apparatus characterized by comprising a disabling means.

[0013]

[Function] Before inputting, the user of the pen is encouraged to put his / her hand on the tablet while holding the input pen, and the pen and the hand holding the pen are put on the tablet at that time. The relative positional relationship between the two pressed points detected in the state is stored, and thereafter, based on this relative positional relationship, it is determined whether the detected pressed point is detected by the hand. Make a decision.

Specifically, when two pressing points are detected at the same time while inputting with a pen,
Based on either one of the pressing points, it is judged whether the other pressing point is a pressing point existing in the position of the relative positional relationship. Assuming that the pressed hand is the pressed point detected by sticking to the tablet, the coordinate data of the pressed point is invalidated.

If not, the same process is performed by reversing the reference pressure point,
It is determined which is the pressed point detected by holding the hand, and the corresponding coordinate data is invalidated.

When it is determined that neither of the pressure points is the pressure point detected by the hand touching the tablet, these pressure points are the two points intentionally input by the user of the pen. Alternatively, it is determined that the error occurred due to a cause other than the touch of the pen input person, and in this case, no special process is performed and the process is stopped.

[0017]

1 is a schematic block diagram of the present invention. Figure 2
FIG. 6 is a diagram showing an example of a display screen of the present invention. FIG. 3 is a flowchart of the registration process of the present invention. FIG. 4 is a flowchart of the invalidation process of the present invention. Embodiments of the present invention will be described below with reference to the drawings.

In FIG. 1, the data processing apparatus of the present invention analyzes a keyboard control unit 1 for controlling input from a keyboard, a pen control unit 2 for controlling a pen, and an operation of a pen on a tablet. A tablet control unit 3 for input control of data, commands, etc. from the tablet, a pressure detection unit 4 for detecting pressing of a pen on the tablet, a disk control unit 5 for controlling access to the disk device,
For a display device such as a display, a display control unit 6 for displaying various data such as input characters and windows as necessary, and various data input by a keyboard or a pen, commands, and read from a disk device. A memory 7 for storing data and the like, a keyboard controller 1, a pen controller 2, a tablet controller 3, a disk controller 5, a display controller 6, and a central processing unit (CPU) 8 for controlling the memory 7. To be done.

The memory 7 has a program execution unit 7a for executing an application program, coordinate data detected by contact with a pen tip or a tablet of a hand, and a data storage unit for storing relative values of these coordinate data. 7b etc. are included.

In the case of a tablet such as an LCD integrated digitizer system, the functions of the tablet controller 3 and the tablet are included in the display controller 6 and the display device.

Next, the registration processing of the present invention will be described based on the display screen example of FIG. First, in order to obtain the relative positional relationship of the pressure points detected by the hand when the pressure of the pressure point detected by the pen tip is used as a reference when the pen user touches the hand As shown in FIG. 5A, a window 11 for prompting the pen user to input a pen is displayed in the display screen 10.

First, a display prompting the user to put his / her hand on the tablet is displayed with the intention of actually inputting the pen by the input person holding the pen (FIG. 5 (b)). At this time, the pen tip should not stick to the tablet.

Then, when the hand is in contact with the tablet, certain coordinate data is detected. Since this coordinate data is detected one after another at regular intervals, a signal is sent to the system by the pen input person pressing a key on the keyboard at a certain timing, and this signal causes the coordinate detected at that time. The data (X1, Y1) is stored in the data storage unit 7b as the coordinate data detected by the contact between the hand and the tablet (FIG. 5).
(C)).

Next, the pen tip is pressed against the tablet without moving the hand, and only the hand in contact with the tablet is released (FIG. 5 (d)). Then, at this time, only the coordinate data due to the pen-down is detected, so that the coordinate data (X0, Y0) detected at a certain timing is similar to the above.
Is stored in the data storage unit 7b as coordinate data detected by the contact between the pen tip and the tablet.

The coordinate data of the above two points is stored in the data storage section 7b.
Then, the relative value (X, Y) of the coordinate data (X1, Y1) detected by the hand with respect to the coordinate data (X0, Y0) detected by the pen tip is obtained.

X and Y can be easily obtained by the following (Equation 1) and (Equation 2). X = X1−X0 (Equation 1) Y = Y1−Y0 (Equation 2) However, each coordinate data has the upper left of the tablet as the origin, and the right direction from the origin is the positive direction of the X axis. , And the downward direction is the positive direction of the Y-axis, the positional information of the detected point.

The relative values (X, Y) obtained by these (Equation 1) and (Equation 2) are also stored in the data storage unit 7b.

Next, the process for obtaining the relative value will be described with reference to the flow chart of FIG. The contact between the hand and the tablet is checked (step S1). Until some coordinate data is detected by the contact between the hand and the tablet,
Repeat step S1. When certain coordinate data is detected (YES in step S1), it is checked whether or not a signal for data acquisition is received (step S1).
2) If yes (YES), go to step S3; if no (NO), go back to step S1.

In step S3, the coordinate data (X1, Y1) detected by the contact between the hand and the tablet is stored in the data storage section 7b. In step S4, contact between the pen tip and the tablet (pen down) is checked. Step S4 is repeated until certain coordinate data is detected by pen down.

When certain coordinate data is detected (YES in step S4), it is checked whether or not a signal for data acquisition is received (step S5), and if it is (YES), the process proceeds to step S6 and is received. If not (NO), the process returns to step S4.

In step S6, it is checked whether or not the coordinate data detected at that time is different from (X1, Y1). If they are different (YES), the process proceeds to step S7. NO) Return to step S4.

In step S7, the coordinate data (X0, Y0) detected by pen down is stored in the data storage section 7b. In step S8, a relative value (X, Y) of the coordinate data detected by the contact between the hand and the tablet is calculated based on the coordinate data detected by the pen-down based on the equations 1 and 2. In step S9,
The calculated relative value (X, Y) is stored in the data storage unit 7b, and the process for obtaining the relative value is ended.

Next, based on the flow chart of FIG.
The invalid process of the coordinate data erroneously detected by the touch of the pen input person will be described by using the relative value stored as described above.

First, it is checked whether or not two points of coordinate data are detected (step S11). If two points of coordinate data are detected (YES), the process proceeds to step S12. However, if only one point of coordinate data is detected,
If three or more points are simultaneously detected (NO), it is considered that the invalid coordinate data invalidation processing according to the present invention is not performed, and the process proceeds to step S19.

In step S12, the detected coordinate data is temporarily stored in the data storage section 7b as two sets (Xa, Ya) and (Xb, Yb).

First, it is checked whether or not the coordinate data (Xa, Ya) is the coordinate data acquired by the contact between the hand and the tablet. The relative value X stored in the data storage unit 7b is added to Xb, and the value is X.
It is checked whether or not it is close to a (step S
13). If they are similar (YES), step S14
If not (NO), the process proceeds to step S16. In step S14, the relative value Y is added to Yb to check whether the value is close to Ya. If they are close to each other (YES), the process proceeds to step S15, and if not (NO), the process proceeds to step S16. In step S15, (Xa, Ya) is likely to be the coordinate data detected by the contact between the hand and the tablet, and (Xb, Yb) is likely to be the coordinate data detected by the pen-down operation. , Ya) are set as invalid data, and the processing according to the present invention ends.

Next, it is checked whether the coordinate data (Xb, Yb) is the coordinate data detected by the contact between the hand and the tablet. The relative value X stored in the data storage unit 7b is added to Xa, and the value is X.
It is checked whether or not it is close to b (step S
16). If they are similar (YES), step S17
If not (NO), the process proceeds to step S19. In step S17, the relative value Y is added to Ya to check whether the value is close to Yb. If they are close to each other (YES), the process proceeds to step S18, and if not (NO), the process proceeds to step S19. In step S18, (Xb, Yb) is likely to be the coordinate data detected by the contact between the hand and the tablet, and (Xa, Ya) is likely to be the coordinate data detected by the pen-down operation. , Yb) are set as invalid data, and the process according to the present invention ends.

In step S19, it is unlikely that the coordinate data of two points has not been detected or that the detected coordinate data of two points are both coordinate data detected by the contact between the hand and the tablet. , For example, two points intentionally entered by the person who entered the pen,
Alternatively, it is determined that there is a high possibility that the error occurred due to a cause other than the touch of the pen input person, and in this case, the process according to the present invention is not performed and the process ends.

Further, the above steps S13 and S1
4. In steps S16 and S17, the relative value is added to one coordinate data to check whether the coordinate data is equal to the other coordinate data, and whether the coordinate data is approximate or not is first detected by the pen tip. We calculated the relative value of the coordinate data detected by the contact between the hand and the tablet when the coordinate data was used as the reference.The relative value indicates that the pen tip is in contact with the tablet and the hand. This is because it is unlikely that the distance of the point where is touching the tablet is always constant in any case.

Therefore, taking the step S13 as an example, what kind of standard is used to judge whether or not the approximation is performed will be described below.

−A ≦ (Xb + X) −Xa ≦ A (Equation 3) In (Equation 3), A is a value that can be freely set or changed by the user of the pen. That is, if the difference between the value obtained by adding the relative value X to Xb and Xa is smaller than the absolute value of the value set by the user of the pen, it is determined that this time is approximate.

[0042]

According to the present invention, during pen input,
It is possible to avoid the detection of a pressing point due to a touch which is not desired by a pen input person when the tablet is touched with a hand and a pen is input.

Therefore, when the present invention is applied to a handwritten character recognition device, it is possible to prevent erroneous recognition of character recognition.

Further, during pen input, when performing pen input with the feeling of paper and pencil, it is natural to carry out input with a hand, and according to the present invention, it is the same feeling as when writing on paper. It is possible to input with, and it is possible to provide a more comfortable pen input state.

Further, the relative positional relationship used when judging the pressed point detected by the touch of the tablet with the hand is not a fixed value, but a value corresponding to each pen input person can be registered. Therefore, it is possible to provide a pen input environment according to the preference of the pen user.

[Brief description of drawings]

FIG. 1 is a schematic block diagram of the present invention.

FIG. 2 is a diagram showing an example of a display screen of the present invention.

FIG. 3 is a flowchart of registration processing of the present invention.

FIG. 4 is a flowchart of invalidation processing of the present invention.

FIG. 5 is a conventional schematic block diagram.

FIG. 6 is a diagram illustrating manual input.

[Explanation of symbols]

 1, 101 Keyboard control unit 2, 102 Pen control unit 3, 103 Tablet control unit 4, 104 Pressure detection unit 5, 105 Disk control unit 6, 106 Display control unit 7, 107 Memory 8, 108 Central processing unit

Claims (1)

[Claims] 1. A data processing device that operates a tablet with a pen and stores and displays the pressed point detected by the contact of the pen tip with the tablet as coordinate data. The data processing device has the pen and the pen on the tablet. Registration means for storing the relative positional relationship between the two pressed points detected in the state of holding the hand, and the relative means stored in the registration means when two pressed points are detected during input. Determination means for determining which of the two pressing points is detected by holding the tablet with a hand based on the positional relationship; A data processing device, comprising: invalidating means for invalidating the coordinate data of the pressed point determined to have been pressed.