JP2001356879A - Display device with touch panel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To allow an operator to perform correction corresponding to the position of each selection point on a display screen by selecting a correction position and to easily perform the continuous correction. SOLUTION: When a touch panel 3 is touched with an input pen 31, a position to be corrected is inputted, and a deviation value at the position is inputted by a cursor key 4. A central control part 2 judges whether or not a correction parameter at the present point of time is calculatable by combining this with the past correction information. When it is judged that the correction parameter is calculatable, a position input information correcting part 8 corrects a coordinate value from the touch panel 3 by using the correction parameter calculated by a correction parameter calculating part 7, and displays the corrected position at a display device 5. Thus, it is possible to perform correction corresponding to each position on a liquid crystal display screen 51 to be corrected only by arbitrarily inputting the correction information without separately providing a reference point in a conventional manner, and to easily cope with even the continuous correction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device with a touch panel for displaying and outputting on a display screen in accordance with a position input to the touch panel.

[0002]

2. Description of the Related Art Conventionally, this type of display device with a touch panel is constructed by superposing a touch panel such as an electromagnetic induction tablet and a display such as a liquid crystal display device. When handwriting is performed on the touch panel or the liquid crystal display screen of the liquid crystal display device with an input pen or the like, the touch panel detects the position of the input pen as a coordinate value. By sequentially lighting the dots on the liquid crystal display screen corresponding to the detected coordinate values, the movement locus of the input pen can be drawn on the liquid crystal display screen. Specific examples of such a display device with a touch panel include, for example, a “handwriting input device” in Japanese Patent Publication No.
JP-A-31766 proposes a "handwritten input / output display device" and the like.

In the "handwriting input device" disclosed in Japanese Patent Publication No. 3-47533, since the touch panel and the display body have a certain thickness, the position of the input pen on the liquid crystal display screen and the coordinates detected by the touch panel are detected. A shift occurs between the positions, and a parallax also occurs between the position of the input pen on the liquid crystal display screen and the display position that is actually visible. In order to correct the displacement and the parallax of these detection positions, the detection position displacement and the amount of the parallax in the vertical and horizontal directions of the entire display screen are checked, and the operator selects and operates the cursor keys in the left, right, up, and down directions. Thereby, a correction parameter corresponding to the amount of the detected position shift or parallax is obtained. The position input from the touch panel is corrected by the correction parameters, and the input corrected position is displayed and output on the display screen.

In the "handwritten input / output display device" disclosed in Japanese Patent Publication No. Hei 5-31766, several reference points are displayed on a display screen, and one of the reference points on the display screen is input to an operator. Have them touch with a pen. The correction parameters are obtained by solving a predetermined simultaneous equation from the detected coordinate position from the touch panel by touching the pen and the coordinate position of the actual reference point. The position input from the touch panel is corrected by the correction parameters, and the input corrected position is displayed and output on the display screen.

[0005]

However, the "handwriting input device" disclosed in Japanese Patent Publication No. 3-47533 discloses a handwriting input device.
With the cursor key selection operation, only the display position correction of uniform translation is applied to the entire display screen, and therefore, at a certain position on the display screen, correction according to the operator's intention is performed. At other distant positions, the correction does not match the intention of the operator.

In the "handwritten input / output display device" disclosed in Japanese Patent Publication No. Hei 5-31766, although the display position can be corrected in accordance with the position of each reference point displayed on the display screen, the correction parameter is not changed. It is necessary to give input position information to the touch panel for a plurality of reference points in order to obtain Therefore, the operator is required to newly perform a pen input operation for a plurality of reference points every time a fine correction is performed. In particular, when performing a fine adjustment, the pen input operation for the reference point is frequently performed. , Not easy to use.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional circumstances, and allows an operator to arbitrarily select a correction position to perform correction in accordance with the position of each selected point on a display screen, and to perform continuous correction. It is an object of the present invention to provide a display device with a touch panel that can easily perform the corrected correction.

[0008]

A display device with a touch panel according to the present invention is a display device with a touch panel for displaying and outputting an input position on a display screen in response to a position input to the touch panel. Correction information input means for inputting a correction amount at a position as correction information; calculation determining means for determining whether correction parameters can be calculated based on the correction information; and correction information when correction parameter calculation is possible. And a position input information correcting means for correcting the position input information from the touch panel with the current correction parameters, thereby achieving the above object. Things.

With the above arrangement, when the operator inputs a position on the screen to be corrected and a correction amount at the position as correction information, it is determined whether or not correction parameters can be calculated based on the input correction information. When the calculation can be performed, the position input information (for example, coordinate values) from the touch panel is corrected and displayed using the calculated correction parameter. For this reason, it is possible to perform the correction corresponding to each position on the display screen to be corrected only by inputting the correction information without separately providing a reference point as in the related art. Also, when the number of input correction information is insufficient and the correction parameter cannot be calculated, by inputting new correction information, if the number of input correction information becomes sufficient, based on the input correction information, Since correction parameters can be calculated, it is possible to easily cope with corrections that are successively successive.

Preferably, the display device with a touch panel according to the present invention further comprises a correction information storage means for storing correction information, and the calculation determining means stores the correction information in the correction information storage means every time the correction information is input. It is determined whether correction parameters can be calculated based on the corrected information.

With the above arrangement, the correction parameter is calculated using the input correction information stored in the correction information storage means each time the correction information is input. In combination with the correction information, it is possible to determine whether or not the correction parameter can be calculated at the present time, and it is possible to immediately reflect the correction information in the position correction every time the correction information is input, so that the continuous correction, particularly the position Fine adjustment of the display can be easily performed.

Still preferably, in a display device with a touch panel according to the present invention, the calculation judging means determines whether the current correction information stored in the correction information storage means is equal to or less than a predetermined number or within a predetermined position range (correction position). Are determined to be close to each other) to determine whether the correction parameter can be calculated. If the correction parameter cannot be calculated, the correction parameter is not calculated. Preferably, the calculation judging means in the display device with a touch panel of the present invention is at least one of a case where the correction amount input continuously plural times is 0 and a case where there is no difference between the correction parameters calculated continuously plural times. In either case, the correction mode ends.

According to the above configuration, the calculation of the inaccurate correction parameter is eliminated, so that the inaccurate position correction is eliminated.

Further, preferably, the calculation judging means in the display device with a touch panel of the present invention judges whether or not a correction parameter can be calculated when a position to be corrected is input, and cannot calculate at the corrected position. In such a case, output control is performed so as to prompt input of correction information at another position.

According to the above configuration, it is determined whether or not a correction parameter can be calculated only by inputting a position to be corrected. Therefore, when calculation cannot be performed at a position to be corrected, another correction amount is input without inputting a correction amount. By performing output control (display or audio output) so as to prompt input of the correction position at the position, the operation work is performed efficiently.

Still preferably, in a display device with a touch panel according to the present invention, when the correction parameters do not depend on the vertical direction and the horizontal direction on the screen, only the correction parameters in directions different from each other are calculated. .

According to the above configuration, the calculation of the correction parameters can be performed with high accuracy by calculating only the correction parameters in the directions having a difference from each other.

Preferably, when the calculation determining means in the display device with a touch panel according to the present invention determines that each correction position of the input correction information used for the calculation is close to a predetermined range, the correction parameter calculating means is used. Calculates a correction parameter using generated information that is not stored in the correction information storage unit, instead of input correction information corresponding to any of the correction positions that are close to each other.

With the above configuration, even when each correction position of the input correction information used for calculation is close to a predetermined range,
Correction parameters can be calculated using input correction information of a correction position remaining after omitting any one of the correction positions that are close to each other and generated information that is not stored in the correction information storage means. Become.

Further preferably, in the display device with a touch panel according to the present invention, when the calculation judging means judges that each correction position of the input correction information used for the calculation is close to a predetermined range, the correction parameter calculation is performed. The means recalculates only the translation coefficient of the correction parameter.

According to the above configuration, when the correction positions of the input correction information used for calculation are close to each other, the accuracy is deteriorated even if the correction parameter is calculated using the input correction information. Even in such a case, if the correction parameters to be calculated are limited to only the parallel movement portion, the correction parameters can be calculated with a certain degree of accuracy.

[0022]

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

FIG. 1 is a block diagram showing the configuration of a display device with a touch panel according to one embodiment of the present invention. In FIG. 1, a display device 1 with a touch panel (terminal device) includes a central control unit 2 that controls the entire terminal device, a touch panel 3 for inputting a display position and a correction position, and a correction amount (a shift amount).
Cursor keys 4 for input, a display device 5 for displaying an input position corresponding to a position input on the touch panel 3, an input information storage unit 6 as correction information storage means, and a correction parameter calculation unit as correction parameter calculation means 7 and a position input information correction unit 8 as position input information correction means. These touch panel 3 and cursor key 4
Constitutes correction information input means.

The hardware configuration of the central control unit 2 includes an input position display control program, a display position correction control program, a ROM for storing various data related to the control program, a display control process and a display based on the control program. It has a CPU (Central Processing Unit) for executing the position correction control processing and a RAM for temporarily storing data necessary for the CPU to execute each processing, and controls each unit.

The functional configuration of the central control unit 2 includes input information determining means for determining whether the content of the input operation instructs the end of the correction mode or the input of the correction information, and the input information of the correction information. In this case, there is provided a calculation judging means for judging whether or not the correction parameter can be calculated based on the correction information. The calculation judging means includes a necessary point judging means for judging whether or not the input correction information has a necessary number of points (the number of point information necessary for calculation), and a correction input position when the input correction information has the necessary point or more. A correction input position determining unit that determines whether the position is within a predetermined position.

The touch panel 3 includes an input pen and a control circuit for detecting a coordinate position using the input pen. The touch panel 3 is configured to detect the position of the input pen as a coordinate value by handwriting using the input pen. Has become. The touch panel 3 is used to input a position on the screen to be corrected as correction information by touching the screen with an input pen.

The cursor key 4 (including one having the same function or function as the cursor key) is used to detect a detected position shift between the position of the input pen and the coordinate position where the input pen is detected on the touch panel 3, The amount of parallax generated between the position of the pen and the display position that is actually visible is input as correction information. It should be noted that the amounts of these detection position shifts and parallax are simply referred to as correction amounts (shift amounts).

The display device 5 is a liquid crystal display device having a liquid crystal display screen and a display control circuit. The liquid crystal display screen is arranged so as to be superimposed on the touch panel 3. By sequentially lighting each dot on the liquid crystal display screen corresponding to the input pen position), the movement locus of the input pen is drawn on the liquid crystal display screen.

The input information storage unit 6 stores, as correction information, a pen touch position to be corrected on the liquid crystal display screen, which is given by the operator using the touch panel 3 and the cursor key 4, and a shift amount at that position. Has become.

The correction parameter calculator 7 calculates correction parameters based on the correction information stored in the input information storage 6.

The position input information correction section 8 stores the correction parameters calculated by the correction parameter calculation section 7 and corrects the position input coordinate values from the touch panel 3 based on the stored current correction parameters. It has become.

The operation of the above configuration will be described below. First, when handwriting is performed using the input pen, the touch panel 3 detects the position of the input pen as a coordinate value. next,
Based on the detected coordinate values output from the touch panel 3,
The display device 5 sequentially turns on each dot on the liquid crystal display screen. Thereby, the movement locus of the input pen can be drawn on the liquid crystal display screen.

At this time, a procedure will be described in which the operator inputs the pen touch position on the display screen to be corrected and the shift amount at that position to the display device 1 with touch panel (terminal device).

FIG. 2 is a screen diagram showing a state where the position X on the liquid crystal display screen 51 to be corrected is being touched with the input pen 31. As shown in FIG. 2, the position (correction point) to be touched on the liquid crystal display screen 51 is not displayed by the display device 5 of the terminal device itself, but the operator operates the liquid crystal display screen 51.
Input pen 3 at any desired position (position to be corrected)
The user can touch 1 to determine a correction point.

FIG. 3 shows a liquid crystal display screen of the display device 5 in which the detected coordinate value output (position input information) from the touch panel 3 due to the touch with the input pen 31 in FIG. FIG. 5 is a screen diagram showing a state where a display is output on a display 51; As shown in FIG. 3, a mark A is displayed at a position shifted from the position X touched on the liquid crystal display screen 51 with the input pen 31 diagonally to the lower right, indicating that the amount of shift is large.

FIG. 4 shows that the operator moves the position of the mark A displayed in FIG.
FIG. 6 is a screen diagram showing a state where the user has moved using. As shown in FIG. 4, the operator inputs a correction amount (shift amount) at a certain correction point to the terminal device. The position to be corrected (correction point) and the amount of deviation at that position are stored in the input information storage unit 6 as input correction information.

The correction mode operation of the terminal device when the correction information is input will be described with reference to the flowchart of FIG.

As shown in FIG. 5, when the operator performs an input operation indicating the correction information or the end in step S1, the central control unit 2 executes the operation based on the control program.
In step S2, it is determined whether the content of the input operation is an instruction to end the correction mode or an instruction to input correction information (a position to be corrected and a shift amount at the position).

If the input operation instructs to end the correction mode in step S2, the central controller 2 ends the correction mode in step S3.
If the instruction is to input correction information in step S
At 4, the central control unit 2 stores the input correction information in the input information storage unit 6.

In step S5, the central control unit 2 determines whether the correction parameter can be calculated by the correction parameter calculation unit 7 using the input correction information stored in the input information storage unit 6 up to now based on the control program. Judge whether or not. This determination procedure will be described later in detail separately.

If the correction parameters can be calculated in step S5, the central control unit 2 controls the correction parameter calculation unit 7 in the next step S6, and the input data stored in the input information storage unit 6 up to the present time. Calculation of a correction parameter is performed based on the correction information. This calculation method will be described later in detail separately. If the calculation of the correction parameter is not possible in step S5, the central control unit 2 proceeds to step S8.
Jumps to and waits for the input operation of the operator again.

After calculating the correction parameters in step S6, the central control unit 2 transmits the calculation result to the position input information correction unit 8 in step S7. Thus, the position input information correction unit 8 corrects the display position according to the calculated correction parameter. The central control unit 2 shifts to waiting for the input operation of the operator again in step S8.

In the above case, as shown in FIG.
When the touched point is displayed on the liquid crystal display screen 51, the correction position is displayed using the position input information correction unit 8, but every time a correction amount (shift amount) is newly input, the correction parameter is displayed. Is calculated again and reflected on the display position on the liquid crystal display screen 51. Thereby, fine adjustment can be performed continuously. In the case where the input of the correction amount (deviation amount) is repeatedly performed and the deviation amount input by the operator several times in succession is 0, the central control unit 2 controls the correction mode to end. Is also good. Further, even when there is not much difference (difference) between the correction parameters calculated several times in succession, the central control unit 2 may perform control so as to end the correction mode. When the correction mode ends, the mode is changed to the position display mode based on the correction amount.

Here, the correction parameters will be described in detail.

A correction parameter for correcting a position input (input coordinate position) to the touch panel 3 is expressed by using functions fx and fy as shown in the following equation (Equation 1). Where x,
y is an output coordinate value from the touch panel 3, and X and Y are coordinate values after correction.

[0046]

(Equation 1) When the functions fx and fy of the above equation (Equation 1) are approximated by finite polynomials of x and y, an approximate expression of fx and fy becomes a finite number of x, y,
It can be obtained from the set of X and Y. As an example,
It can be approximated by the following equation (Equation 2). In the following equation (Equation 2), there are six correction parameters A to F.
It can be obtained from the set of x, y, Z, and Y (excluding points where division by 0 occurs). Where A,
B, C, D, E, and F are constants.

[0047]

(Equation 2) When the above equation (Equation 2) is used, parameters A, B,
A method of calculating C, D, E, and F will be described.

As x and y, a position input (coordinate value output) to the touch panel 3 is used. For X and Y, a correction position of a desired point specified by the operator using the cursor key 4 is used. Since these are both input by the operator to the terminal device and stored in the input information storage unit 6, the correction parameters can be obtained by simple algebraic calculations.

Next, a method for determining whether or not a correction parameter can be calculated using the input correction information in the input information storage unit 6 will be described.

When obtaining all the constants (coefficients) of the correction parameters from the above-described correction parameter calculation method, input correction information at several positions is required. When the correction parameter is represented by the equation (Equation 2), input correction information at three points is required. If there are not enough points, the correction parameters cannot be calculated. Hereinafter, the number of pieces of point information necessary for the calculation is referred to as a necessary number of points.

When the correction parameter is calculated when the corrected points are close to each other, the correction parameter is divided by a value close to 0, and the measurement error and the rounding error originally included in the input information greatly affect the calculation result. . In such a case, the correction parameter should not be calculated because the accuracy is not good.

In the correction method of the present invention, since the operator arbitrarily selects a position to be corrected, the input correction information stored in the input information storage unit 6 also includes point information at positions close to each other. there is a possibility. To calculate the correction parameter, only the latest information on the required number of points in the input information storage unit 6 is used, and if points close to each other are included in the information, a method of not calculating the correction parameter (old method) Information may be forgotten), a method of selecting and calculating information of points apart from each other from the latest information in the input information storage unit 6, or a method equivalent thereto.

Referring to the flowchart of FIG.
A procedure for determining whether or not the correction parameter can be calculated when y is represented by Equation (Formula 3) will be described. The following equation (Equation 3) is a very simple equation, but in the case of Equation (Equation 2), the same judgment is made using a well-known general extension, such as the calculation of a determinant. Can be.

[0054]

(Equation 3) As shown in FIG. 6, in step S11, the determination as to whether or not the correction parameter can be calculated is started. Based on the control program, the central control unit 2 stores in the input information storage unit 6 Find out if it is stored in. If the required score is not exceeded in step S12,
In step S13, it is determined that calculation is not possible. Step S
If the score is equal to or more than the required score in step 12, a determinant is calculated in step S14 to check whether division by a number close to 0 occurs. The calculation of this determinant is as follows in this case. In the case of the above equation (Equation 3), the required number of points is two. X, y, X, and Y for each point are represented by adding suffixes 1 and 2. When expressed by a matrix, the following equation (Equation 4) is obtained.

[0055]

(Equation 4) Therefore, division by a number close to 0 does not occur and the coefficients A,
C, E, and F can be calculated with high accuracy because the determinant x1-x
2, when the absolute value of y1−y2 is greater than a certain value. Here, this certain value depends on the error originally included in the input information and the accuracy of the desired calculation result, but may be determined based on empirical rules. If it does not exceed a certain value, it is determined that the calculation cannot be performed in step S13. At this time, processing may be further continued based on past information. If there is more than a certain value, it can be calculated in step S15.

As described above, the method for determining whether the correction parameter can be calculated is based on the required points,
It depends on each input position on the touch panel 3. Therefore, when the operator touches the position to be corrected with the input pen 31, it can be determined whether the correction parameter can be calculated. Before the operator inputs the amount of the detected position shift or parallax using the cursor key 4, it is determined whether or not correction parameters can be calculated at the time when the position to be corrected is touched with the input pen 31, and the correction is performed. When calculation is not possible at a position, the display may be output on the liquid crystal display screen 51 so as to prompt input of correction information at another position, or an alarm sound may be output as sound.

Next, a method for supplementing the input correction information stored in the input information storage unit 6 when the correction parameter cannot be calculated by the above method will be described.

A case will be described in which the correction parameter is calculated only in one of the vertical and horizontal directions.

It is assumed that the functions fx and fy are represented by the following equation (Equation 5). In this equation (Equation 5), X,
Y is not affected by the inputs x and y in the other directions.
Here, three points (three correction positions G1 to G
When the input correction information of 3) is given, since there is no difference in the vertical direction, the coefficients D, E, and F in the vertical direction cannot be determined accurately, but there is no problem in obtaining the coefficients in the horizontal direction. .

[0060]

(Equation 5) Therefore, when there is no dependency between the vertical direction and the horizontal direction of the input / output, only the correction parameter in one direction (the direction with a difference in the input position) is calculated, and the correction in the other direction (the direction with no difference in the input position) You can take the method of not calculating parameters.

Next, a method of supplementing the correction information by using the far fixed point will be described. For the sake of explanation, a case represented by the above equation (Equation 3) will be considered.

In the above equation (Equation 3), the required number of points is two, but if there are two points (two correction positions H1 and H2) close to each other within a predetermined range as shown in FIG. Since the accuracy is low, it cannot be calculated by the conventional method. Therefore, in order to be able to calculate even in such a case, another virtual point is created. As the virtual point, it is preferable to select a point at which the calculation accuracy is high, and such a point is visually a point far from the point input by the operator. For this reason, it will be referred to as a far fixed point. FIG. 9 shows a far fixed point I1 provided at the corner. In this case, the values of x, y, X, and Y are required to calculate the correction parameters.
X and Y may be coordinates of a fixed point at a distance, and x and y may be values that become X and Y after correction with the current correction parameters. That is, the far fixed point is considered to have been corrected. That is, by regarding a certain point (distant fixed point) on the liquid crystal display screen 51 as having been corrected, one of two points of input correction information from the operator is complemented by the far fixed point. One of the two points of the input correction information close to the predetermined range as shown in FIG. 8 is omitted, and the remaining input correction information and the far fixed point (correction amount 0)
The correction parameter may be calculated using the above. This correction method is effective when the input position of the operator is located at the edge of the liquid crystal display screen 51.

Next, a description will be given of a method of restricting the coefficients to be calculated so that the calculation can be performed. In addition,
For the sake of explanation, consider the case where the above expression (Equation 2) is used.

In the case of the above equation (Equation 2), the required number of points is three. However, the accuracy of the calculation result is deteriorated at three points (three correction positions J1 to J3) close to each other as shown in FIG. Can not be calculated by the method of. Therefore, in order to enable calculation in such a case, the coefficients to be calculated are limited. Specifically, only the parallel movement coefficients C and F are calculated. The entire screen is translated in parallel by the correction amount moved by the cursor key 4 by the operator. Since this will change the correction parameters for the entire screen,
It is desirable that the input position of the operator be located at the center of the screen.

As described above, according to the present embodiment, when the operator touches with the input pen 31, the position to be corrected is input, and when the cursor key 4 is moved to the desired position by the correction amount, the detected position shift occurs. And a shift amount corresponding to the amount of parallax is input. On the other hand, since the correction parameters are calculated from the correction information at a plurality of points, the central control unit 2
Determines whether the current correction parameter can be calculated in combination with the past correction information based on the control program. If it can be calculated, the correction parameter calculation unit 7
The position input information correction unit 8 corrects the coordinate value from the touch panel 3 using the correction parameter calculated by the control unit 3 and displays the position on the liquid crystal display screen 51 of the display device 5. For this reason,
Just by inputting correction information without separately providing a reference point as in the related art, correction can be performed according to each position on the liquid crystal display screen 51 to be corrected. Corrections can be made and fine adjustments that need to be made repeatedly can be made easily.

[0066]

As described above, according to the first aspect, only the position on the screen to be corrected and the correction amount at that position are input as correction information, and the correction parameter is set at the present time based on the input correction information. Judge whether or not the calculation can be performed, calculate if it can be calculated, and display the corrected position of the position input information from the touch panel with the calculated correction parameter, so there is no need to separately provide a reference point as in the past , If the operator enters the correction information at any position,
Correction according to each position on the display screen to be corrected can be freely performed, continuous correction can be easily performed, and fine adjustment can be easily performed.

According to the present invention, the correction parameter is calculated using the input correction information stored in the correction information storage means every time the correction information is input, so that the operator inputs the correction information. Each time, it is possible to determine whether it is possible to calculate the correction parameter at the present time in combination with the past correction information, and to promptly reflect the position correction every time the correction information is input. Fine adjustment of the position display can also be easily performed.

Further, according to the third aspect, the calculation of the inaccurate correction parameter is excluded, and as a result,
Accurate position correction can be performed.

Furthermore, according to the fourth aspect, the operator does not need to bother to end the correction mode, and the operation can be performed efficiently.

Further, according to the fifth aspect, it is determined whether or not a correction parameter can be calculated only by inputting a position to be corrected. If the calculation cannot be performed at the position to be corrected, a correction amount is further input. By performing output control so as to prompt input of the correction information at another position, the operation work can be performed efficiently.

Further, according to the present invention, since only the correction parameters in directions different from each other are calculated, the correction parameters can be calculated with high accuracy.

Further, according to the present invention, even when each correction position of the input correction information used for calculation is close to a predetermined range, one of the close correction positions is left. The correction parameter can be calculated using the input correction information of the correction position and the generated information that is not stored in the correction information storage unit.

Further, according to the present invention, when the correction positions of the input correction information used for the calculation are close to each other, the accuracy deteriorates even if the correction parameters are calculated using the input correction information. However, in such a case, if the correction parameters to be calculated are limited to the parallel movement portion, the calculation of the correction parameters can be performed with a certain degree of accuracy.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration of a display device with a touch panel according to an embodiment of the present invention.

FIG. 2 is a screen view showing a state in which a position to be corrected is touched with an input pen in the display device with a touch panel in FIG. 1;

FIG. 3 is a screen diagram showing a state in which position input information of a touch panel of the display device with a touch panel of FIG. 1 is displayed after being corrected by a current correction parameter.

FIG. 4 is a screen view showing a state where the screen state shown in FIG. 3 has been moved to a desired position using a cursor key.

FIG. 5 is a flowchart showing an operation when an input is made to the display device with a touch panel in FIG. 1;

FIG. 6 is a flowchart showing an operation of a correction parameter calculation availability determination process in FIG. 5;

FIG. 7 is a screen view showing an input position suitable for calculating one of the correction parameters in the vertical direction and the horizontal direction.

FIG. 8 is a screen view showing an input position suitable for calculating a correction parameter using a far fixed point.

FIG. 9 is a screen diagram showing distant fixed points in the case of the input position in FIG. 8;

FIG. 10 is a screen diagram showing an input position suitable for recalculating only the coefficient of translation.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Display device with a touch panel 2 Central control part (calculation determination means) 3 Touch panel (correction information input means) 31 Input pen (position input means) 4 Cursor keys (correction information input means) 5 Display device (display means) 51 Liquid crystal display screen 6 input information storage unit (correction information storage unit) 7 correction parameter calculation unit (correction parameter calculation unit) 8 position input information correction unit (position input information correction unit)

Claims (8)

[Claims] 1. A display device with a touch panel for displaying and outputting an input position on a display screen according to a position input to the touch panel, wherein correction information for inputting a position on the screen to be corrected and a correction amount at the position as correction information. Input means, calculation determining means for determining whether a correction parameter can be calculated based on the correction information, and correction parameter calculating means for calculating a correction parameter based on the correction information when calculation of the correction parameter is possible And a position input information correcting means for correcting the position input information from the touch panel with the current correction parameter. 2. The apparatus according to claim 1, further comprising a correction information storage unit configured to store the correction information, wherein the calculation determining unit performs correction based on the correction information stored in the correction information storage unit each time the correction information is input. The display device with a touch panel according to claim 1, wherein it is determined whether parameter calculation is possible. 3. The calculation determining unit determines whether the current correction information stored in the correction information storage unit is equal to or smaller than a predetermined number or within a predetermined position range.
3. The display device with a touch panel according to claim 2, wherein it is determined whether or not the correction parameter can be calculated, and when the correction parameter cannot be calculated, the correction parameter is not calculated. 4. The method according to claim 1, wherein the calculation determining unit is configured to determine whether the correction amount input continuously plural times is 0 or at least one of a case where there is no difference between the correction parameters calculated continuously plural times. The display device with a touch panel according to claim 2, wherein control is performed to end the correction mode. 5. The calculation judging means judges whether a correction parameter can be calculated at the time of inputting a position to be corrected, and if the correction parameter cannot be calculated at the corrected position, the correction information of another position is calculated. 4. The display device with a touch panel according to claim 3, wherein output control is performed so as to prompt input. 6. The display device with a touch panel according to claim 1, wherein the correction parameter calculating means calculates only correction parameters in directions different from each other when the correction parameters do not depend on the vertical direction and the horizontal direction on the screen. 7. When the calculation determining unit determines that each correction position of the input correction information used for calculation is close to a predetermined range, the correction parameter calculating unit determines that each correction position is close. 2. The display device with a touch panel according to claim 1, wherein the correction parameter is calculated using generated information that is not stored in the correction information storage unit, instead of the input correction information corresponding to any of the positions. 3. 8. When the calculation determining means determines that each correction position of the input correction information used for calculation is close to a predetermined range, the correction parameter calculating means determines whether or not the correction parameter is to be translated. Claim 1 wherein only coefficients are recalculated
The display device with a touch panel according to the above.