KR101992851B1 - Touch coordinate calculation method and touch screen device using the same - Google Patents

Abstract

The present invention relates to a touch coordinate calculation method and a touch screen device using the same. The method of calculating touch coordinates according to an embodiment of the present invention is a touch coordinate calculation method of a touch screen panel including Tx lines, Rx lines, and touch sensors formed at intersections of the Tx lines and the Rx lines, A first step of supplying driving pulses to the Tx lines, converting voltage of touch sensors received through the Rx lines into digital data and outputting touch row data; A second step of calculating touch correction data by correcting the touch row data using reference data; A third step of setting a label to touch correction data having a value equal to or larger than a first touch threshold value; A fourth step of analyzing the touch correction data included in the label to determine whether the label is canceled; And a fifth step of calculating touch coordinates of touch correction data having a value equal to or greater than a second touch threshold value among the touch correction data set with the label.

Description

TECHNICAL FIELD [0001] The present invention relates to a method of calculating touch coordinates and a touch screen device using the same,

The present invention relates to a touch coordinate calculation method and a touch screen device using the same.

A user interface (UI) enables communication between a person (user) and various electric or electronic devices, allowing a user to easily control the device as desired. Representative examples of such a user interface include a keypad, a keyboard, a mouse, an on screen display (OSD), a remote controller having infrared communication or radio frequency (RF) communication function, and the like. User interface technology has been developed to enhance the user's sensibility and ease of operation. Recently, the user interface has evolved into a touch UI, a voice recognition UI, a 3D UI, and the like.

Touch UI is becoming a necessity for portable information devices and is being applied to household appliances. As an example of a touch screen device for implementing a touch UI, a touch screen device of a mutual capacitance type capable of recognizing each multi-touch is spotlighted.

The mutual capacitive touch screen device includes a touch screen panel having Tx lines, Rx lines intersecting Tx lines, and touch sensors formed at intersections of Tx lines and Rx lines. Each of the touch sensors has mutual capacity. The touch screen device senses the amount of charge change of each of the touch sensors before and after the touch to judge whether or not the conductive material is in contact with the touch sensor. The touch screen device supplies driving pulses to the Tx lines of the touch screen panel, converts the charge variation of the touch sensors received through the Rx lines into touch row data, which is digital data, and calculates touch coordinates by analyzing the touch row data do.

FIGS. 1A and 1B are illustrations showing the area where the finger is touched to the touch screen panel and the size of the touch row data. In the graphs of FIGS. 1A and 1B, the x-axis indicates the position of the touch screen panel TSP, and the y-axis indicates the value of the touch row data TRD. Referring to FIGS. 1A and 1B, the touch row data TRD is large because the charge variation of the touch sensor is large as the area A1, A2 of the finger touching the touch screen panel TSP is large.

FIGS. 2A and 2B are illustrations showing the area of the finger near the touch screen panel and the size of the touch row data. In the graphs of FIGS. 2A and 2B, the x axis indicates the position of the touch screen panel TSP, and the y axis indicates the value of the touch row data TRD. Referring to FIGS. 2A and 2B, in the mutual capacitive type touch screen device, the charge of the touch sensors is changed even when a conductive material such as a finger approaches the touch screen panel TSP. However, when the finger of the touch screen panel TSP approaches the area A3 smaller than the predetermined area as shown in FIG. 2A, the touch row data TRD is small because the charge variation of the touch sensor is small. Therefore, it is general that the touch coordinates are not calculated only when the finger is brought close to the touch screen device. 2B, when the finger of the touch screen panel TSP is close to the area A4 larger than the predetermined area, the charge amount of charge of the touch sensor is large, so that the touch row data TRD is large. Accordingly, the touch coordinates can be calculated by simply bringing the finger close to the touch screen device.

The present invention provides a touch coordinate calculation method that does not calculate touch coordinates irrespective of the area of a conductive material when the conductive material is in direct proximity to the touch screen device, and a touch screen device using the same.

The method of calculating touch coordinates according to an embodiment of the present invention is a touch coordinate calculation method of a touch screen panel including Tx lines, Rx lines, and touch sensors formed at intersections of the Tx lines and the Rx lines, A first step of supplying driving pulses to the Tx lines, converting voltage of touch sensors received through the Rx lines into digital data and outputting touch row data; A second step of calculating touch correction data by correcting the touch row data using reference data; A third step of setting a label to touch correction data having a value equal to or larger than a first touch threshold value; A fourth step of analyzing the touch correction data included in the label to determine whether the label is canceled; And a fifth step of calculating touch coordinates of touch correction data having a value equal to or greater than a second touch threshold value among the touch correction data set with the label.

A touch screen device according to an embodiment of the present invention includes a touch screen panel including Tx lines, Rx lines, and touch sensors formed at intersections of the Tx lines and the Rx lines; A touch driving circuit for supplying driving pulses to the Tx lines, converting a voltage of the touch sensors received through the Rx lines into digital data and outputting touch row data; And a touch coordinate calculator for receiving the touch row data from the touch driving circuit. The touch coordinate calculator includes: a touch row data correcting unit for correcting the touch row data using reference data to calculate touch correction data; A label setting unit for setting a label to touch correction data having a value equal to or larger than a first touch threshold value; A label canceller for analyzing the touch correction data included in the label to determine whether to cancel the label; And a touch coordinate data output unit for calculating touch coordinates of touch correction data having a value equal to or larger than a second touch threshold value among the touch correction data set to the label and outputting touch coordinate data including information about the touch coordinates .

According to the present invention, a label representative value of a label (LB) capable of distinguishing between a case in which a conductive material is directly in contact with a touch screen panel (TSP) and a case in which a conductive material is not in direct contact with the panel, Cancel or maintain the label. As a result, the present invention can cancel the label after the conductive material does not directly contact the panel using the label representative value, but detects the label set in close proximity. Therefore, according to the present invention, in the case where the conductive material is not in direct contact with the touch screen panel (TSP), the touch coordinates are not calculated, thereby preventing miscalculation of touch coordinates.

FIGS. 1A and 1B are exemplary views showing the area where the finger is touched to the touch screen panel and the size of the touch row data.
FIGS. 2A and 2B illustrate examples in which a finger shows an area close to a touch screen panel and a size of touch row data. FIG.
3 is a block diagram schematically illustrating a display device and a touch screen device according to an embodiment of the present invention.
4 is a block diagram showing the touch coordinate calculation unit of FIG. 3 in detail.
5 is a flowchart showing a touch coordinate calculation method of the touch coordinate calculation unit;
FIG. 6 is a block diagram illustrating a labeling canceling unit according to the first embodiment of the present invention. FIG.
FIG. 7 is a flowchart showing a labeling canceling method according to the first embodiment of the present invention. FIG.
FIG. 8 is an exemplary view showing touch correction data in a label. FIG.
9 is a block diagram showing a labeling canceling unit according to a second embodiment of the present invention.
10 is a flowchart showing a labeling canceling method according to a second embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings. Like reference numerals throughout the specification denote substantially identical components. In the following description, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

3 is a block diagram schematically illustrating a display device and a touch screen device according to an embodiment of the present invention. 3, the display device includes a display panel DIS, a gate driving circuit 10, a data driving circuit 20, a timing controller 30, a host system 70, and the like. The touch screen device includes a touch screen panel (TSP), a touch drive circuit 40, a touch coordinate calculation unit 50, and the like.

First, a display device according to an embodiment of the present invention will be described in detail. A display device according to an exemplary embodiment of the present invention includes a liquid crystal display (LCD), a field emission display (FED), a plasma display panel (PDP), an organic light emitting diode An organic light emitting display (OLED), and an electrophoresis (EPD) display device. In the following embodiments, a display device according to an exemplary embodiment of the present invention is described as a liquid crystal display device, but the present invention is not limited thereto.

The display panel DIS includes a liquid crystal layer formed between the lower substrate and the upper substrate. A plurality of gate lines G1 to Gn and n are a natural number) intersecting the data lines D1 to Dm and m are natural numbers and the data lines D1 to Dm are formed on the lower substrate of the display panel DIS . In addition, a plurality of thin film transistors formed at intersections of the data lines D1 to Dm and the gate lines G1 to Gn, a plurality of pixel electrodes for charging data voltages to the liquid crystal cells, A storage capacitor for maintaining the voltage of the liquid crystal cell, and the like are formed.

A black matrix, a color filter, or the like may be formed on the upper substrate of the display panel DIS. However, when the display panel DIS is implemented as a COT (Color Filter On TFT) structure, the black matrix and the color filter may be formed on the lower substrate of the display panel DIS. The display panel DIS may be implemented by any known liquid crystal mode such as a Twisted Nematic (VA) mode, a VA (Vertical Alignment) mode, an IPS (In Plane Switching) mode, and a FFS (Fringe Field Switching) mode.

On the upper substrate and the lower substrate of the display panel DIS, a polarizing plate is attached, and an alignment film for forming a pre-tilt angle of the liquid crystal on the inner surface in contact with the liquid crystal is formed. A column spacer for maintaining a cell gap of the liquid crystal cell is formed between the upper substrate and the lower substrate of the display panel DIS. A backlight unit may be disposed below the rear surface of the display panel DIS. The backlight unit is implemented as an edge type or direct type backlight unit, and irradiates the display panel (DIS) with light.

The data driving circuit 20 receives the digital image data RGB and the source timing control signal DCS from the timing controller 30. The data driving circuit 20 converts the digital image data RGB into analog positive / negative polarity data voltages according to the source timing control signal DCS and supplies the data to the data lines. The gate driving circuit 10 sequentially supplies the gate pulse (or scan pulse) synchronized with the data voltage to the gate lines G1 to Gn to select pixels of the display panel DIS to supply the data voltage.

The timing controller 30 receives digital image data (RGB) and timing signals from the host system 70. The timing signals may include a vertical synchronization signal, a horizontal synchronization signal, a data enable signal, a dot clock, and the like. The vertical synchronization signal is a signal defining one frame period. The horizontal synchronizing signal is a signal which defines one horizontal period required to supply the data voltages to the pixels of one horizontal line of the display panel DIS. The data enable signal is a signal defining a period during which valid data is input. The dot clock is a signal repeated in a predetermined short period.

The timing controller 30 generates a timing control signal for controlling the operation timing of the data driving circuit 20 based on the timing signals so as to control the operation timing of the gate driving circuit 10 and the data driving circuit 20. [ And generates a gate timing control signal (GCS) for controlling the operation timing of the gate driving circuit (DCS) and the gate driving circuit (10). The timing controller 30 outputs the gate timing control signal GCS to the gate driving circuit 10 and the digital video data RGB and the source timing control signal DCS to the data driving circuit 20. [

The host system 70 may be implemented as any one of a navigation system, a set top box, a DVD player, a Blu-ray player, a personal computer (PC), a home theater system, a broadcast receiver, and a phone system. The host system 70 includes a system on chip (SoC) with a built-in scaler to convert the digital image data RGB of the input image into a format suitable for display on the display panel DIS. The host system 70 transmits digital image data (RGB) and timing signals to the timing controller 30. The host system 70 analyzes the touch coordinate data HIDxy input from the touch coordinate calculation unit 50 and executes an application program associated with the coordinates at which the touch occurred by the user.

Second, a touch screen device according to an embodiment of the present invention will be described in detail. The touch screen panel TSP includes Tx lines (T1 to Tj, j is a natural number of 2 or more), Rx lines (R1 to Ri, i is a natural number of 2 or more) intersecting the Tx lines (T1 to Tj) And i x j touch sensors formed at the intersections of the lines T1 to Tj and the Rx lines R1 to Ri. It should be noted that each of the touch sensors may be implemented with mutual capacitance in an equivalent circuit, but is not limited thereto.

When the touch screen device is combined with the display device, the touch screen panel TSP may be bonded to the upper portion of the display panel DIS. In particular, in the case where the display device is implemented as a liquid crystal display device, the touch screen panel TSP may be bonded onto the upper polarizer plate of the display panel DIS or between the upper polarizer plate and the upper substrate of the display panel DIS . In addition, the touch sensors of the touch screen panel TSP may be formed (in-cell type) on the lower substrate together with the pixel array in the display panel of the liquid crystal display device.

The touch driving circuit 40 supplies a driving pulse to the Tx lines T1 to Tj and senses the touch sensor voltage through the Rx lines R1 to Ri in synchronization with the driving pulse. The touch driving circuit 40 includes a Tx driving circuit 41, an Rx driving circuit 42, and a touch controller 43. The Tx driving circuit 41, the Rx driving circuit 42, and the touch controller 43 can be integrated in one ROIC (Read-out IC).

The Tx driving circuit 41 selects a Tx channel to output a driving pulse under the control of the touch controller 43 and supplies driving pulses to Tx lines connected to the selected Tx channel. The Rx driving circuit 42 selects an Rx channel to receive the charge variation of the touch sensors under the control of the touch controller 43 and receives the charge variation of the touch sensors through the Rx lines connected to the selected Rx channel. The Rx driver circuit 42 samples the charge variation of the touch sensors received through the Rx lines R1 to Ri and accumulates the charge variation in the integrator. The Rx drive circuit 42 inputs the voltage accumulated in the integrator to an analog-to-digital converter (ADC) and converts the voltage into touch raw data (TRD), which is digital data, and outputs the converted data.

The touch controller 43 includes a Tx setup signal for setting a Tx channel to which a drive pulse is to be output in the Tx drive circuit 41 and a Rx setup signal for setting an Rx channel for receiving the touch sensor voltage in the Rx drive circuit 42. [ Signal. In addition, the touch controller 43 generates timing control signals for controlling the operation timing of the Tx driving circuit 41 and the Rx driving circuit 42.

The touch coordinate calculator 50 receives the touch row data TRD from the touch driver circuit 40. The touch coordinate calculation unit 50 calculates the touch coordinate (s) according to the touch coordinate calculation method according to the embodiment of the present invention and transmits the touch coordinate data including the information of the touch coordinate (s) to the host system 70 Output. The touch coordinate calculation unit 50 may be implemented as an MCU (Micro Controller Unit). A detailed description of the touch coordinate calculation unit 50 will be given later with reference to FIGS. 4 and 5. FIG.

4 is a detailed block diagram of the touch coordinate calculation unit of FIG. 5 is a flowchart showing a touch coordinate calculation method of the touch coordinate calculation unit. 4, the touch coordinate calculation unit 50 includes a touch row data correction unit 51, a label setting unit 52, a label cancellation unit 53, a touch coordinate data output unit 54, and the like. Hereinafter, the touch coordinate calculation method of the touch coordinate calculation unit 50 will be described in detail with reference to FIGS. 4 and 5. FIG.

First, the touch row data correcting unit 51 receives the touch row data TRD from the touch driving circuit 40. The touch row data correction unit 51 corrects the touch row data TRD using the reference data to calculate the touch correction data TCD. Specifically, the touch row data correction unit 51 calculates the touch correction data TCD by subtracting the reference data from the touch row data TRD. In addition, the touch row data correction unit 51 may perform an integral correction algorithm on the touch correction data TCD. The integration correction algorithm means an algorithm for unifying the sign of the touch correction data (TCD) having a positive value and the negative value with a touch correction data (TCD) having a positive value. The touch low data correction unit 51 outputs the touch correction data TCD to the label setting unit 52. [ (S101)

Second, the label setting unit 52 receives the touch correction data TCD. The label setting unit 52 sets a label to the touch correction data TCD having a value equal to or larger than the first touch threshold value. The label means to display the touch correction data TCD in a predetermined block so as to detect the touch correction data TCD having a value equal to or larger than the first touch threshold value. The label setting unit 52 sets the label so that the touch correction data TCD having a value equal to or larger than the first touch threshold value are adjacent to each other and that the touch correction data TCD is included in one label . In FIG. 8, a label including a plurality of adjacent touch correction data (TCD) is shown. (S102)

Thirdly, the label canceling unit 53 analyzes the touch correction data included in the label and cancels or retains the label. The label canceller 53 detects and cancels such a label because the label can be set when the area of the conductive material is large even when the conductive material is not in direct contact with the touch screen device but in proximity thereto. Details of the label canceling method of the label canceling unit 53 will be described later with reference to FIGS. 6, 7, 9, and 10. FIG. (S103)

Fourth, the touch coordinate data output unit 54 calculates touch correction data having a value equal to or larger than the second touch threshold value among the label correction data. The second touch threshold value may be set to a value larger than the first touch threshold value, and the first touch threshold value and the second touch threshold value may be determined in advance through a preliminary experiment. Then, the touch coordinate data output unit 54 calculates the touch coordinate (s) of the touch correction data having a value equal to or larger than the second touch threshold value. The touch coordinate data output unit 54 transmits touch coordinate data (HIDxy) including information of the touch coordinate (s) to the host system 70. [ (S104)

FIG. 6 is a detailed block diagram illustrating a labeling canceling unit according to the first embodiment of the present invention. FIG. 7 is a flowchart illustrating a labeling cancellation method according to the first embodiment of the present invention. FIG. 8 is an exemplary view showing touch correction data in one label. 6, the labeling cancellation unit 53 according to the first embodiment of the present invention includes a label sum calculation unit 100, a label representative value calculation unit 110, and a label cancellation decision unit 120 . Hereinafter, a labeling cancellation method of the label cancellation unit according to the first embodiment of the present invention will be described in detail with reference to FIG. 6 to FIG.

First, the label total calculation unit 100 calculates the total of the touch correction data TCD included in the label LB by the first label total. For example, the label totaling unit 100 may calculate the total sum of the 14 touch correction data (TCD) included in the label LB as " 22359 " as shown in FIG. 8 by the first label sum. The label totaling unit 100 may store the first label total in an embedded memory. (S201)

Second, the label totaling unit 100 detects touch correction data having a peak value in the label LB, and calculates the sum of the touch correction data adjacent thereto as a second label total. For example, the label totaling unit 100 calculates the touch correction data "1635", "1756", and "1756" adjacent to the touch correction data "1874" having the peak value in the label LB, Quot ;, "1624 ", and" 1682 "can be calculated by the second label sum. As a result, the label totaling unit 100 can calculate the sum of "1635", "1756", "1624", and "1682" The label totaling unit 100 may store the second label total in an embedded memory. (S202)

Third, the label totaling unit 100 calculates the total of the third labels by summing the first label sum and the second label sum. For example, the label totaling unit 100 may calculate "29056", which is the sum of the first label sum "22359" and the second label sum "6697", by the third label sum. On the other hand, the total sum of the third labels calculated by the label sum calculation unit 100 is obtained by adding the touch correction data adjacent to the touch correction data having the peak value within the label (LB) to the sum of the touch correction data included in the label (LB) It can be seen as a reflected value. (S203)

Fourth, the label representative value calculation unit 110 calculates the label representative value by dividing the sum of the third labels calculated by the label sum calculation unit 100 by the peak value of the touch correction data in the label LB. For example, the label representative value calculation unit 110 calculates a value obtained by dividing the total value of the third labels "29056" by the peak value "1874" of the touch correction data in the label (LB) as a label representative value.

On the other hand, when the conductive material is in direct contact with the touch screen panel TSP, the touch correction data having the peak value in the label LB is overwhelmingly larger than the touch correction data adjacent thereto. However, when the conductive material is not in direct contact with the touch screen panel TSP but in proximity to the touch screen panel TSP, the touch correction data having a peak value in the label LB is substantially similar to the touch correction data adjacent thereto. This is because the charge variation of the touch sensor of the touch screen panel (TSP) is largely generated when the conductive material contacts directly. As a result, the label representative value is smaller when the conductive material is in direct contact with the touch screen panel than when the conductive material is not in direct contact with the panel. (S204)

The label cancellation decision unit 120 cancels the label LB when the representative value of the label of one of the labels LB is equal to or greater than the predetermined threshold value, Value, the label LB is maintained. The threshold value can be determined in advance by a preliminary experiment to an appropriate value. Since the label representative value is smaller when the conductive material is in direct contact with the touch screen panel than when the conductive material is not in direct contact with the panel, the label cancellation determination unit 120 determines that the label of any one of the labels LB If the representative value is greater than or equal to a predetermined threshold value, the label determines that the conductive material does not come in direct contact with the panel, but closes the label, and cancels the label. (S205, S206, S207)

As described above, according to the present invention, the representative value of the label of the label (LB), which can distinguish the case where the conductive material directly contacts the touch screen panel (TSP) and the case where the conductive material does not come in direct contact with the panel, , The label is canceled or maintained according to the representative value of the label. As a result, the present invention can cancel the label after the conductive material does not directly contact the panel using the label representative value, but detects the label set in close proximity. Therefore, according to the present invention, in the case where the conductive material is not in direct contact with the touch screen panel (TSP), the touch coordinates are not calculated, thereby preventing miscalculation of touch coordinates.

9 is a block diagram showing a labeling cancellation unit according to the second embodiment of the present invention. 10 is a flowchart illustrating a labeling cancellation method according to a second embodiment of the present invention. Referring to FIG. 9, the labeling cancellation unit 53 according to the second embodiment of the present invention includes a label representative value calculation unit 200 and a label cancellation decision unit 210. Hereinafter, a labeling cancellation method of the label cancellation unit according to the second embodiment of the present invention will be described in detail with reference to FIGS. 8 to 10. FIG.

First, the label representative value calculation unit 200 calculates an average value of the remaining touch correction data excluding the touch correction data having a peak value within the label LB. For example, the label representative value calculating unit 200 may calculate an average value of the remaining 13 pieces of touch correction data excluding the touch correction data "1874 " having a peak value within the label LB as shown in FIG. (S301)

Secondly, the label representative value calculation unit 200 calculates the label representative value by multiplying the average value by a predetermined ratio. The predetermined ratio can be preset to an appropriate value through a preliminary experiment. The label representative value may be a value representative of the remaining touch correction data excluding the touch correction data having the peak value in the label LB. (S302)

Third, when the label representative value of one label LB is equal to or less than the touch correction data having the peak value, the label cancel determination unit 210 cancels the label LB and the label representative value is compared with the touch If it is larger than the correction data, the label is retained. On the other hand, when the conductive material is in direct contact with the touch screen panel TSP, the touch correction data having the peak value in the label LB is overwhelmingly larger than the touch correction data adjacent thereto. However, when the conductive material is not in direct contact with the touch screen panel TSP but in proximity to the touch screen panel TSP, the touch correction data having a peak value in the label LB is substantially similar to the touch correction data adjacent thereto. Therefore, the label representative value is more likely to be smaller than the touch correction data having a peak value when the conductive material is not in direct contact with the panel, and the touch correction data having the peak value when the conductive material is in direct contact with the touch screen panel It is more likely to be larger. Therefore, if the label representative value of one of the labels LB is equal to or smaller than the touch correction data having the peak value within the label LB, the label cancel determination unit 210 determines that the label LB is in contact with the conductive material It is determined that the label is not set in the vicinity, and the label LB is canceled.

On the other hand, the larger the predetermined ratio multiplied to the average value in step S302, the larger the label representative value becomes, so that it becomes insensitive to label canceling. On the other hand, the smaller the predetermined ratio is, the smaller the label representative value becomes, so that it becomes sensitive to label cancellation. Accordingly, the predetermined ratio can be predetermined to a proper value through a preliminary experiment. (S303)

As described above, according to the present invention, the representative value of the label of the label (LB), which can distinguish the case where the conductive material directly contacts the touch screen panel (TSP) and the case where the conductive material does not come in direct contact with the panel, , The label is canceled or maintained according to the representative value of the label. As a result, the present invention can cancel the label after the conductive material does not directly contact the panel using the label representative value, but detects the label set in close proximity. Therefore, according to the present invention, in the case where the conductive material is not in direct contact with the touch screen panel (TSP), the touch coordinates are not calculated, thereby preventing miscalculation of touch coordinates.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. Therefore, the technical scope of the present invention should not be limited to the contents described in the detailed description of the specification, but should be defined by the claims.

DIS: Display panel TSP: Touch screen panel
10: gate driving circuit 20: data driving circuit
30: Timing controller 40: Touch driving circuit
41: Tx driving circuit 42: Rx driving circuit
43: Touch controller 50: Touch coordinate calculation part
51: touch row data correcting unit 52: label setting unit
53: label canceling unit 54: touch coordinate data output unit
70: Host system 100: Label totaling unit
110, 200: label representative value calculating unit 120, 210:

Claims (9)

A method of calculating touch coordinates of a touch screen panel including Tx lines, Rx lines, and touch sensors formed at intersections of the Tx lines and the Rx lines,
A first step of supplying driving pulses to the Tx lines, converting voltage of touch sensors received through the Rx lines into digital data and outputting touch row data;
A second step of calculating touch correction data by correcting the touch row data using reference data;
A third step of setting a label to touch correction data having a value equal to or larger than a first touch threshold value;
A fourth step of analyzing the touch correction data included in the label to cancel the label if the calculated label representative value is equal to or greater than a predetermined threshold value or the label representative value is equal to or less than the touch correction data having a peak value; And
And a fifth step of calculating touch coordinates of touch correction data having a value equal to or larger than a second touch threshold value among the touch correction data whose label is not canceled. The method according to claim 1,
In the fourth step,
Calculating a sum of the touch correction data included in the label by a first label sum;
Detecting touch correction data having a peak value in the label and calculating a sum of the touch correction data adjacent thereto in a second label sum;
Summing the first label sum and the second label sum to calculate a third label sum;
Calculating a label representative value by dividing the total sum of the third labels by the peak value;
Canceling the label when the representative value of the label is equal to or greater than a threshold value; And
And maintaining the label if the label representative value is less than the threshold value. The method according to claim 1,
In the fourth step,
Calculating an average value of the remaining touch correction data excluding the touch correction data having a peak value in the label;
Calculating a label representative value by multiplying the average value by a predetermined ratio;
Canceling the label if the label representative value is less than or equal to the peak value; And
And maintaining the label if the label representative value is greater than the peak value. A touch screen panel including Tx lines, Rx lines, and touch sensors formed at intersections of the Tx lines and the Rx lines;
A touch driving circuit for supplying driving pulses to the Tx lines, converting a voltage of the touch sensors received through the Rx lines into digital data and outputting touch row data; And
And a touch coordinate calculator for receiving the touch row data from the touch driver circuit,
The touch coordinate calculator calculates,
A touch row data correcting unit for correcting the touch row data using reference data to calculate touch correction data;
A label setting unit for setting a label to touch correction data having a value equal to or larger than a first touch threshold value;
A label canceller for canceling the label if the label representative value calculated by analyzing the touch correction data included in the label is greater than or equal to a predetermined threshold value or the label representative value is equal to or smaller than the touch correction data having a peak value; And
And a touch coordinate data output unit for calculating touch coordinates of touch correction data having a value equal to or larger than a second touch threshold value among the touch correction data for which the label is not canceled and outputting touch coordinate data including information about the touch coordinates Wherein the touch screen device is a touch screen device. 5. The method of claim 4,
The label canceling unit
Calculating a sum of the touch correction data included in the label as a sum of the first label, detecting touch correction data having a peak value in the label, calculating a sum of the touch correction data adjacent thereto as a second label sum, And a label total sum calculating unit for summing the sum of the first label and the sum of the second labels to calculate a total sum of the third labels. 6. The method of claim 5,
The label canceling unit
And a label representative value calculation unit for calculating a label representative value by dividing the total sum of the third labels by the peak value. The method according to claim 6,
The label canceling unit
Further comprising a label cancel determination unit for canceling the label if the label representative value is greater than or equal to a threshold value and maintaining the label if the label representative value is smaller than the threshold value. 5. The method of claim 4,
The label canceling unit
And a label representative value calculation unit for calculating an average value of the touch correction data excluding the touch correction data having a peak value in the label and multiplying the average value by a predetermined ratio to calculate a label representative value. Device. 9. The method of claim 8,
The label canceling unit
Further comprising a label cancel determination unit for canceling the label if the label representative value is less than or equal to the peak value and maintaining the label if the label representative value is greater than the peak value.

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