KR100443838B1 - Touch panel apparatus and method for driving the same - Google Patents

Abstract

The present invention relates to a touch panel device capable of quickly and accurately compensating an error value while preventing an error coordinate value from being detected by distinguishing a double touch, and a driving method thereof.

The present invention provides a touch panel for generating a coordinate signal for a user's touch point, controlling the driving of the touch panel, detecting a coordinate value for the coordinate signal, and recognizing a dual touch generated from the touch panel. A touch panel controller for generating a touch determination signal and a detected coordinate value received from the touch panel controller, and in response to the dual touch determination signal, compensate for an error coordinate value due to the dual touch to adjust the true coordinate value. A system for detecting is provided.

According to this configuration, the present invention determines the dual touch of the hand touch by a pen (finger) touch and the palm in the touch panel controller, and uses the central processing unit of the system having a high processing speed according to the determined dual touch determination signal. By compensating for the touch, fast and accurate coordinate values can be detected.

Description

TOUCH PANEL APPARATUS AND METHOD FOR DRIVING THE SAME}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a touch panel, and more particularly, to a touch panel device and a driving method thereof capable of quickly and accurately compensating for an error value while preventing error coordinates from being detected by distinguishing dual touches.

There are various kinds of displays for displaying an image, such as a cathode ray tube, a liquid crystal display, a plasma display panel, an electro luminescence display, and the like. In order to easily input the input information on the screen, such displays use a touch panel that is installed on the surface of the screen to input information corresponding to the location when the user presses the surface with a pen (finger).

Referring to FIG. 1, a conventional touch panel device controls a touch panel 10 that outputs a coordinate signal of a touch point, a coordinate value according to a coordinate signal from the touch panel 10 by controlling the driving of the touch panel 10. And a touch panel controller 30 for detecting and outputting the detected signal to the system 40, and a system 40 for performing a corresponding command in response to the coordinate values from the touch panel controller 30.

The touch panel 10 includes an upper film 12 on which the first transparent conductive layer 14 is formed, and a lower substrate 16 on which the second transparent conductive layer 18 is formed and spaced apart from the upper film 12. Equipped.

The upper film 12 and the lower substrate 16 are bonded by a sealing material 22 applied along the outer portion of the non-touch area and spaced apart by the height of the sealing material 22. In addition, a plurality of dot spacers 20 may be formed on the first transparent conductive layer 14 or the lower substrate 16 of the upper film 12 to separate the upper film 12 and the lower substrates 12 and 16 from the touch area. ) Is further formed on the second transparent conductive layer 18.

As the upper film 12 pressed by the pen (finger), a transparent film made of polyethylene terephthalate (PET) or the like is mainly used. The lower substrate 16 is a transparent film or glass of the same material as the upper substrate 12. Substrates or plastic substrates are used. As the first and second transparent conductive layers 14 and 18, any one of indium-tin-oxide (ITO), indium-zine-oxide (IZO), and indum-tin-zine-oxide (ITZO) is used. .

The touch panel 10 is connected to X-electrode bars 15 connected to both sides of the X-axis direction of the first transparent conductive layer 14, and to both sides of the Y-axis direction of the second transparent conductive layer 18. Further provided is a Y-electrode bar 19. The X-electrode bar 15 applies the first X-electrode bar 15A and the ground voltage GND to supply a driving voltage Vcc to flow a current in the X-axis direction to the first transparent conductive layer 14. The second X-electrode bar 15B is supplied. The Y-electrode bar 19 has a first Y-electrode bar 19A for supplying a driving voltage Vcc and a ground voltage GND to supply current to the second transparent conductive layer 16 in the Y-axis direction. It consists of the 2nd Y-electrode bar 19B which supplies.

When the pen (finger) presses the upper film 12 and the first transparent conductive layer 14 contacts the second transparent conductive layer 18, the touch panel 10 changes the resistance value according to the contact position. . In addition, since the current or the voltage is changed according to the variable resistance value, the touch panel 10 is connected to the first transparent conductive layer 14 through the second X-electrode bar 15B. It outputs the axial coordinate signal and outputs the Y-axis coordinate signal through the second Y-electrode bar 19B connected to the second transparent conductive layer 18. In this case, the touch panel 10 sequentially outputs the X-axis coordinate signal and the Y-axis coordinate signal under the control of the touch panel controller 30.

Specifically, when the driving voltage Vcc and the ground voltage GND are supplied to the X-electrode bar 15 through the first and second switches 24 and 26, the touch panel 10 may be first and second transparent. The X-axis coordinate signal is output through the second X-electrode bar 15B in response to a resistance variable by the point where the conductive layers 14 and 18 contact. Subsequently, when the driving voltage Vcc and the ground voltage GND are supplied to the Y-electrode bar 19 through the first and second switches 24 and 26, the touch panel 10 may have the first and second transparent conductive layers. The Y-axis coordinate signal is output through the second Y-electrode bar 19B in response to the resistance value changed by the point where the layers 14 and 18 contact.

Here, the first switch 24 may drive the driving voltage Vcc in response to the control signal CS from the touch panel controller 30 to the first X-electrode bar 15A or the first Y-electrode bar 19A. To be supplied. The second switch 26 supplies the base voltage GND to the second X-electrode bar 15B or the second Y-electrode bar 19B in response to the control signal CS from the touch panel controller 30. Done.

The touch panel controller 30 detects the coordinate values according to the X-axis and Y-axis coordinate signals of the touch points supplied from the touch panel 10 and supplies them to the system 40. In addition, the touch panel controller 30 controls the first and second switches 24 and 26 according to the X-axis coordinate mode and the Y-axis coordinate mode to control the supply of power (Vcc, GND) to the touch panel 10. do.

To this end, the touch panel controller 30 includes an analog-to-digital converter (hereinafter referred to as an ADC) 32 and an ADC 32 for converting X-axis and Y-axis coordinate signals from the touch panel 10 into digital data. The microcomputer 34 which detects the coordinate value by the combination of X-axis and Y-axis coordinate data from the microcomputer 34 and outputs it to the system 40, and the interface part which relays the coordinate value from the microcomputer 34, and supplies it to the system 40. FIG. 36 is provided.

The ADC 32 converts each of the X-axis coordinate signal and the Y-axis coordinate signal sequentially supplied from the touch panel 10 into digital data and outputs the digital data.

The microcomputer 34 detects the coordinate value of the touch panel 10 contact point by combining the X-axis and Y-axis coordinate data sequentially supplied from the ADC 32, and detects the detected coordinate value through the interface unit 36. To the system 40. In addition, the microcomputer 34 generates the control signal CS at regular intervals so that the first switch 24 sets the driving voltage Vcc to the first X-electrode bar 15A or the first Y-electrode bar 19A. The second switch 26 causes the ground voltage GND to be supplied to the second X-electrode bar 15B or the second Y-electrode bar 19B.

The system 40 detects a coordinate value supplied from the touch panel controller 30 and executes a corresponding command or executes an application program associated with the coordinate value. The system 40 also supplies power signals and video data for a display (not shown) on which the touch panel 10 is mounted on a surface.

As described above, the conventional touch panel device detects a coordinate value pressed by a pen (finger) and transmits it to the system 40 to perform a command corresponding to the coordinate value in the system 40. However, in the touch panel 10, the dual touch by the palm is generated together with the pen (finger).

For example, in the case of a touch panel device using a pen, as shown in FIG. 2, when a user's palm presses the touch panel 10 together with a pen, the touch panel 10 may have a double touch, that is, a pen touch point PT. ) And the hand touch point HT are generated. In this case, the pen touch point PT and the hand touch point HT may occur simultaneously or at a predetermined time difference.

Here, when the pen touch point PT and the hand touch point HT occur at the same time, the touch panel 10 generates a coordinate signal for the middle point between the two points PT and HT, so that the touch panel controller 30 And the system 40 commits an error of recognizing the intermediate point as the pen touch point PT.

In addition, when the hand touch point HT occurs while the pen is touched after the pen touch point PT is generated, the touch panel 10 generates a first coordinate signal with respect to the pen touch point PT. A second coordinate signal is generated for an intermediate point between the pen touch point PT and the hand touch point HT. When the first and second coordinate signals are generated within a unit time for detecting a coordinate value in the touch panel controller 30, for example, 3.4 ms, the touch panel controller 30 coordinates with respect to the second coordinate signal input later. Since the value is detected and supplied to the system 40, the system 40 makes an error of recognizing the intermediate point as the pen touch point PT.

Accordingly, an object of the present invention is to provide a touch panel device and a driving method thereof capable of quickly and accurately compensating for an error value while preventing an error coordinate value from being detected by distinguishing a double touch.

1 is a view showing a conventional touch panel device.

2 is a diagram illustrating a double touch phenomenon in a touch panel.

3 illustrates a touch panel device according to an embodiment of the present invention.

FIG. 4 is a block diagram illustrating a touch panel controller and a system shown in FIG. 3.

FIG. 5 is a diagram illustrating X-axis detection coordinates by dual touch of a right-handed user in the touch panel shown in FIG. 3.

FIG. 6 is a diagram illustrating Y-axis detection coordinates by dual touch of a right-handed user in the touch panel shown in FIG. 3.

FIG. 7 is a diagram illustrating a right hand dual touch area in the touch panel shown in FIG. 3.

FIG. 8 is a view illustrating a left hand double touch area in the touch panel shown in FIG.

FIG. 9 is a flowchart illustrating a method of driving a touch panel device according to an exemplary embodiment of the present invention by the microcomputer shown in FIG. 3.

<Description of Symbols for Main Parts of Drawings>

10, 50: touch panel 12, 52: upper film

14, 54: first transparent conductive film 16, 56: lower substrate

18, 58: 2nd transparent conductive film 20, 60: dot spacer

24, 26, 64, 66: switch 30, 70: touch panel controller

32, 72: analog-to-digital converter (ADC) 34, 74: microcomputer

36, 76: interface unit 40, 80: system

15, 55: X-electrode bar 15A, 55A: first X-electrode bar

15B, 55B: second X-electrode bar 19, 59: Y-electrode bar

19A, 59A: first Y-electrode bar 19B, 59B: second Y-electrode bar

100: coordinate detection unit 102: dual touch determination unit

104: coordinate transmitter 110: coordinate receiver

112: coordinate calculation unit 114: hand rejection processing unit

116: coordinate display unit 118: central processing unit

122: memory 124: compensation unit

In order to achieve the above object, the touch panel device according to the present invention, the touch panel for generating a coordinate signal for the user's touch point, and controls the driving of the touch panel and detects the coordinate value for the coordinate signal A touch panel controller for generating a dual touch determination signal by recognizing the dual touch generated in the touch panel, and receiving the detected coordinate value from the touch panel controller and in response to the dual touch determination signal. A system for detecting the true coordinate value is provided by compensating for the error coordinate value.

In the device, the touch panel controller receives a coordinate detection unit for detecting a coordinate value of the coordinate signal, and receives a coordinate value from the coordinate detection unit and recognizes the dual touch within a unit time to generate a dual touch determination signal. And a determination unit and a transmission unit which transmits the detected coordinate values and the dual touch determination signal to the system.

In the device, when the first point coordinate value and the second point coordinate value are input from the touch panel within a preset unit time, the dual touch determination unit determines whether the second point coordinate value is a coordinate value due to the dual touch. And generating a double touch determination signal.

The dual touch determining unit may generate the dual touch determination signal when the second point coordinate value is included in a preset dual touch region.

The dual touch determination unit in the device, characterized in that for generating the double touch determination signal when the second point coordinate value exceeds a preset reference value.

The dual touch determination unit may generate the dual touch determination signal when the second point coordinate value is included in a preset dual touch region and exceeds a preset reference value.

The dual touch determining unit may generate the dual touch determination signal when the second point coordinate value is included in a preset right hand double touch area or left hand double touch area.

The reference value in the device is characterized in that the minimum value between the touch point by the pen (finger) and the hand touch point is double touch.

In the apparatus, the system receives a coordinate value and a dual touch determination signal transmitted from a central processing unit and the touch panel controller, and detects the true coordinate value according to the dual touch determination signal using the central processing unit. And a touch panel driver configured to display the true coordinate value or execute a command corresponding to the true coordinate value.

The touch panel driver may include a receiver configured to receive coordinate values transmitted from the touch panel controller, a memory configured to store the coordinate values received by the receiver, and a coordinate value stored in the memory. And a compensation unit for detecting the coordinates of the authenticity according to the determination signal.

In the device, when the second point coordinate value is determined to be dual touch by the double touch determination signal, the compensator uses the central processing unit to set the second point coordinate value by the difference with the first point coordinate value. Compensating for calculating the true coordinate value.

According to an embodiment of the present disclosure, a method of driving a touch panel device includes detecting a first point coordinate value of a first touch point of a touch panel, and a second point of a second touch point from the touch panel within a unit time. Detecting a coordinate value; determining whether the coordinate value is double touched using the first point coordinate value and the second point coordinate value, and generating a double touch determination signal; and generating the first point coordinate value and the second point coordinate value. And transmitting a dual touch determination signal to a system, receiving the first point coordinate value, a second point coordinate value, and a dual touch determination signal, and error coordinates due to the dual touch in response to the dual touch determination signal. Compensating the value to detect the coordinate value of authenticity.

The determining of the dual touch in the driving method may include determining the dual touch when the second point coordinate value is out of the dual touch reference range.

In the driving method, the dual touch reference range is characterized in that the minimum range between the coordinate value of the touch point by the pen or finger and the coordinate value generated by the double touch.

The determining of the dual touch in the driving method may include determining whether the user is in a right hand mode or a left hand mode.

And determining the double touch when the second point coordinate value is out of a preset right hand double touch reference range when it is determined as the right hand use mode in the step of determining the mode in the driving method.

In the driving method, the right hand double touch reference range is a forward minimum value between a coordinate value of a touch point by a pen or a finger and a coordinate value generated by a double touch.

The determining of the dual touch in the driving method may include determining the dual touch when the X and Y axis coordinate values of the second point coordinate value are larger than the X axis and Y axis reference coordinate values of the right hand dual touch reference range. Characterized in that it comprises a step.

And determining that the second point coordinate value is the double touch when the second point coordinate value is out of a preset left hand double touch reference range in the driving method.

Compensating the dual touch in the driving method comprises the step of compensating the second point coordinate value by the difference value between the first point coordinate value and the second point coordinate value.

Other objects and advantages of the present invention in addition to the above objects will become apparent from the detailed description of the embodiments with reference to the accompanying drawings.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to FIGS. 3 to 8.

3 illustrates a touch panel device for preventing dual touch according to an exemplary embodiment of the present invention.

The touch panel device shown in FIG. 3 controls a touch panel 50 that outputs a coordinate signal of a touch point, a driving control of the touch panel 50, and detects a coordinate value according to the coordinate signal from the touch panel 50. A touch panel controller 70 outputting to 80, and a system 80 for performing a corresponding command in response to the coordinate values from the touch panel controller 70.

The touch panel 50 includes an upper film 52 on which the first transparent conductive layer 54 is formed, and a lower substrate 56 on which the second transparent conductive layer 58 is formed and spaced apart from the upper film 52. Equipped.

The upper film 52 and the lower substrate 56 are bonded by a sealing material 62 applied along the outer portion of the non-touch area and spaced apart by the height of the sealing material 62. In addition, a plurality of dot spacers 60 may be formed on the first transparent conductive layer 54 or the lower substrate 56 of the upper film 52 to separate the upper film 52 from the lower substrate 56 in the touch area. 2 is further formed on the transparent conductive layer 58.

As the upper film 52 pressed by the pen (finger), a transparent film made of polyethylene terephthalate (PET) or the like is mainly used, and as the lower substrate 56, a transparent film of the same material as the upper substrate 52, Glass substrates or plastic substrates are used. As the first and second transparent conductive layers 54 and 58, any one of Indum-Tin-Oxide (ITO), Indum-Zine-Oxide (IZO), and Indum-Tin-Zine-Oxide (ITZO) are used. .

The touch panel 50 is connected to X-electrode bars 55 connected to both sides of the X-axis direction of the first transparent conductive layer 54 and to both sides of the Y-axis direction of the second transparent conductive layer 58. A Y-electrode bar 59 is further provided. The X-electrode bar 55 supplies the first X-electrode bar 55A and the ground voltage GND to supply the driving voltage Vcc so that current flows in the X-axis direction to the first transparent conductive layer 54. The second X-electrode bar 55B is supplied. The Y-electrode bar 59 has a first Y-electrode bar 59A for supplying a driving voltage Vcc and a ground voltage GND to supply current to the second transparent conductive layer 56 in the Y-axis direction. It consists of the 2nd Y-electrode bar 59B which supplies.

When the pen (finger) presses the upper film 52 and the first transparent conductive layer 54 is in contact with the second transparent conductive layer 58, the touch panel 50 may vary the resistance according to the contact position. . In addition, since the current or the voltage is changed according to the variable resistance value, the touch panel 50 may change the current or voltage through the second X-electrode bar 55B connected to the first transparent conductive layer 54. It outputs the axial coordinate signal, and outputs the Y-axis coordinate signal through the second Y-electrode bar 59B connected to the second transparent conductive layer 58. In this case, the touch panel 50 sequentially outputs the X-axis coordinate signal and the Y-axis coordinate signal under the control of the touch panel controller 70.

In detail, when the driving voltage Vcc and the base voltage GND are supplied to the X-electrode bar 55 through the first and second switches 64 and 66, the touch panel 50 may be first and second transparent. The X-axis coordinate signal is output through the second X-electrode bar 55B in response to the resistance value changed by the point where the conductive layers 54 and 58 are in contact. Subsequently, when the driving voltage Vcc and the ground voltage GND are supplied to the Y-electrode bar 59 through the first and second switches 64 and 66, the touch panel 50 may have the first and second transparent conductive layers. The Y-axis coordinate signal is output through the second Y-electrode bar 59B in response to the resistance variable by the point where the 54 and 58 contacts.

Here, the first switch 64 receives the driving voltage Vcc in response to the control signal CS from the touch panel controller 70. The first X-electrode bar 55A or the first Y-electrode bar 59A may be used. To be supplied. The second switch 66 supplies the base voltage GND to the second X-electrode bar 55B or the second Y-electrode bar 59B in response to the control signal CS from the touch panel controller 70. Done.

The touch panel controller 70 detects the coordinate values according to the X-axis and Y-axis coordinate signals of the touch points supplied from the touch panel 50 and supplies them to the system 80. The touch panel controller 70 controls the first and second switches 64 and 66 to control the supply of power (Vcc, GND) to the touch panel 50.

To this end, the touch panel controller 70 includes an analog-to-digital converter (hereinafter referred to as an ADC) 72 and an ADC 72 for converting X-axis and Y-axis coordinate signals from the touch panel 50 to digital data. The microcomputer 74 detects the coordinate value by combining the X-axis and Y-axis coordinate data from the microcomputer 74 and outputs it to the system 80, and an interface unit for relaying the coordinate value from the microcomputer 74 to the system 80. 76 is provided.

The ADC 72 converts each of the X-axis coordinate signal and the Y-axis coordinate signal sequentially supplied from the touch panel 50 into digital data and outputs the digital data.

The microcomputer 74 generates the control signal CS in a predetermined time unit so that the first switch 64 transmits the driving voltage Vcc to the first X-electrode bar 55A or the first Y-electrode bar 59A. The second switch 66 causes the base voltage GND to be supplied to the second X-electrode bar 55B or the second Y-electrode bar 59B. Accordingly, the microcomputer 74 detects the coordinate value of the touch point of the touch panel 50 by combining the X-axis and Y-axis coordinate data sequentially supplied from the ADC 72, and converts the detected coordinate value into the interface unit 76. To the system 80). In addition, the microcomputer 74 generates a hand touch determination signal by distinguishing between dual touches on the touch panel 50, that is, pen (finger) touch and hand touch.

To this end, the microcomputer 74 receives the digital data from the ADC 72 as shown in FIG. 4, and detects the coordinate values. The microcomputer 74 stores the coordinate values detected by the coordinate detector 100. And a double touch judging unit 102 for judging the double touch using the detected coordinate values transmitted from the coordinate detecting unit 100 and the coordinate detecting unit 100 to be transmitted to (80).

The coordinate detector 100 outputs the detected coordinate value every fixed unit time, for example, 3.4 ms to 5 ms, to the dual touch determiner 102 and the coordinate transmitter 104.

The dual touch determination unit 102 is a dual touch determination unit 102, if the first point coordinate value and the second point coordinate value is input from the touch panel 50 within a preset unit time, the second point coordinate value is double It determines whether the coordinate value is due to the touch to generate a double touch determination signal (WTS). That is, the dual touch determination unit 102 detects the coordinates of the first point of the touch panel 50, and then detects the second coordinate value from the touch panel 50 via the ADC 32 within the unit time for detecting the next coordinate value. When the point coordinate value is input, it is determined whether the second point coordinate value exceeds a preset dual touch reference value and transmits the dual touch determination signal WTS to the system 80.

In this case, the dual touch reference value set in the dual touch determination unit 102 may vary depending on whether the user uses the right hand mode using the right hand or the left hand mode using the left hand. This is because the dual touch area varies depending on whether the user uses the right hand and the left hand.

For example, when the user uses the right hand, as illustrated in FIG. 5, the hand touch point HT is positioned at the right side of the pen (finger) touch point PT in the X-axis direction. Accordingly, the second point X axis coordinate value for the intermediate point DP generated by the hand touch point HT is located to the right of the first point X axis coordinate value for the pen (finger) touch point PT. It can be seen that it has a relatively large value. On the other hand, when the user uses the left hand, the second point X axis coordinate value by the hand touch has a relatively small value located to the left of the first point X axis coordinate value with respect to the pen (finger) touch point. Can be.

6, the hand touch point HP is located below the pen (finger) touch point PT in the Y-axis direction. Accordingly, the second point Y axis coordinate value for the intermediate point DP generated by the hand touch point HT is located below the first point Y axis coordinate value for the pen (finger) touch point PT. It can be seen that it has a relatively large value. Even when the user uses the left hand, the second point Y-axis coordinate value by the hand touch has a relatively large value located below the first point Y-axis coordinate value with respect to the pen (finger) touch point PT. Able to know.

Therefore, when the user uses the right hand, as shown in FIG. 7, the lower right area in which the X-axis and Y-axis coordinates of the touch area TA of the touch panel 50 have a relatively large value is the right-hand double touch area ( RHTA). On the other hand, when the user uses the left hand, as shown in FIG. 8, the X-axis coordinate of the touch area TA of the touch panel 50 has a relatively small value and the Y-axis coordinate has a relatively large value. The lower area corresponds to the left hand double touch area (LHTA).

As a result, when the dual touch reference value is set as described above with the X axis coordinate value of about 60 and the Y axis coordinate value of about 80, the right hand dual touch reference value becomes X axis +60, Y axis +80, and the left hand double touch reference value Can be set to X axis -60 and Y axis +80. When the second point coordinate value exceeds the aforementioned double touch reference value, the dual touch determination unit 102 converts the second point coordinate value by the dual touch, that is, the pen (finger) touch point and the hand touch. It will be recognized as the error coordinate value for the midpoint of the point.

As described above, the dual touch determination unit 102 supplies the dual touch determination signal WTS of the touch panel 50 to the coordinate transmission unit 104 by using the dual touch reference value. In other words, the dual touch determination unit 102 generates the dual touch determination signal WTS when the second point coordinate value is included in the preset right hand dual touch region or left hand dual touch region. In addition, the dual touch determination unit 102 generates the dual touch determination signal WTS when the second point coordinate value is included in the preset dual touch region. In addition, the dual touch determination unit 102 generates the double touch determination signal WTS when the second point coordinate value is included in the preset dual touch region and exceeds the preset reference value. In addition, the dual touch determination unit 102 generates the double touch determination signal WTS when the second point coordinate value is included in a preset right hand dual touch region or left hand dual touch region. Here, the reference value is set to the minimum value between the touch point by the pen (finger) and the hand touch point that is double touched.

The coordinate transmitter 104 transmits the digital coordinate value detected by the coordinate detector 100 and the dual touch determination signal WTS from the dual touch determination unit 102 to the system 80.

As shown in FIG. 4, the system 80 displays the error coordinate values due to the dual touches transmitted from the touch panel controller 74 in response to the dual touch determination signal WTS. ) To detect the true true coordinates of the pen touch point. In addition, the system 80 supplies power signals and video data necessary for a display (not shown) in which the touch panel 50 is mounted on a surface.

To this end, the system 80 includes a central processing unit 118 and a touch panel driver 82 to compensate for error coordinate values due to dual touch.

The touch panel driver 82 receives a digital coordinate value transmitted from the touch panel controller 74 and a communication protocol for the digital coordinate value received from the coordinate receiver 110 in the resolution of the display screen. Compensation of the digital coordinate value reset by the coordinate calculation unit 112 in response to the double coordinate determination signal (WTS) from the coordinate operation unit 112 and the touch panel controller 74 to reset the received digital coordinate value to correspond to And a coordinate display unit 116 for displaying the true coordinate values compensated by the hand reject processing unit 114 and the display unit.

The coordinate receiver 110 receives the digital coordinate value and the dual touch determination signal WTS transmitted from the coordinate transmitter 104 of the touch panel controller 74 and supplies it to the coordinate calculator 112.

The coordinate calculator 112 resets the digital coordinate value received by the coordinate receiver 110 to match the communication protocol of the display resolution (XGA, SVGA, etc.) and supplies the digital coordinate value to the hand rejection processor 114.

The hand rejection processor 114 corrects the coordinate value generated by the dual touch on the touch panel 50 in response to the dual touch determination signal WTS from the coordinate receiver 110 in the form of an actual display. At this time, the hand rejection processor 114 corrects the error coordinate value generated by the dual touch using the central processing unit 118 having a high processing speed.

To this end, the hand rejection processor 114 may store the reset coordinate values supplied from the coordinate calculator 112 and the new coordinates supplied from the coordinate calculator 112 and the memory values stored in the memory 122. Compensation unit 124 for generating a true coordinate by the error coordinate value is compensated for using the value.

The memory 122 sequentially stores the first point coordinate value and the second point coordinate value of the touch panel 50 detected by the touch controller 74.

When the dual touch determination signal WTS from the touch controller 74 is ON (signal indicating that it is a dual touch), the compensator 124 coordinates the first point and the second point stored in the memory 122. The difference value of the coordinate value is detected, the second point coordinate value is compensated by the difference value, and the true coordinate value is generated and transmitted to the coordinate display unit 116. At this time, the compensator 124 generates a fast and accurate true coordinate value by using the fast processing speed of the central processing unit 118. On the other hand, when the dual touch determination signal WTS from the touch controller 74 is OFF (signal indicating that it is a normal pen touch), the compensator 124 and the first point coordinate value stored in the memory 122 may be used. The second point coordinate value is sequentially supplied to the coordinate display unit 116.

The coordinate display unit 116 executes the corresponding execution program or the associated application program by the true coordinate value supplied from the compensator 124. In addition, the system 80 supplies power signals and video data necessary for a display (not shown) in which the touch panel 50 is mounted on a surface.

As described above, the touch panel device according to the present invention can recognize the true true coordinate value for the pen (finger) touch by compensating the coordinate value due to the dual touch by distinguishing the pen (finger) touch from the dual touch.

FIG. 9 is a flowchart illustrating a method of driving the touch panel device illustrated in FIG. 3, which is performed by the hand rejection processor 114 of the system 80 illustrated in FIG. 4.

First, the coordinate detection unit 100 of the microcomputer 74 in the touch panel controller 70 combines the first X-axis coordinate value and the Y-axis coordinate value sequentially input with respect to the first touch point of the user. The point coordinate value is detected and supplied to the dual touch determination unit 102. Subsequently, the dual touch determination unit 102 detects the coordinate value of the first point of the touch panel 50, and then detects the second coordinate value from the touch panel 50 via the ADC 32 within the unit time for detecting the next coordinate value. When the point coordinate value is input, it is determined whether the second point coordinate value exceeds a preset dual touch reference value and transmits the dual touch determination signal WTS to the system 80.

Meanwhile, the compensator 124 of the hand rejection processor 114 is initialized in step S100 and then determines whether the user selects the right hand mode or the left hand mode in steps S102 and S122. Here, the user selects the right hand or left hand mode in various ways. Here, when the touch panel 50 is used exclusively by an individual, the right hand or left hand mode may be selected when the touch panel 50 drive program is installed in the system 80. In addition, when a plurality of touch panels 50 are used in common, a mode selection switch provided in hardware may be used in the touch panel 50 or a display in which the touch panel 50 is mounted, or the touch panel 50 may be The mode selection menu displayed through the mounted display allows the user to select the right hand or left hand mode.

If it is determined in step S102 that the user selects the right hand mode, the compensator 124 proceeds to step S104 and is inputted through the ADC 72 from the touch panel 50 by the user's touch and stored in the memory 122. Input point coordinate value.

Then, when the second point coordinate value is not input within the unit time in step S106, the compensator 124 proceeds to step S108 and touches the first point coordinate value input in step S104 by a pen (finger). It is recognized as a supply to the coordinate display unit 116. Accordingly, the coordinate display unit 116 positions the mouse cursor at the point of the first point coordinate value or executes a command corresponding to the first point coordinate value.

On the other hand, when the second point coordinate value is input within the unit time in step S106, the compensator 124 proceeds to step S110 and the double touch determination signal from the double touch determination unit 102 of the touch panel controller 70. It is determined whether (WTS) is on. In this case, when the input dual touch determination signal WTS is on, the compensator 124 detects the difference between the first point coordinate value and the second point coordinate value and detects the difference between the first point coordinate and the first point coordinate. The true coordinate value is generated by compensating the value or the second point coordinate value. That is, when the input second point coordinate value is out of the preset right hand double touch reference range as described above, the compensator 124 determines that the error coordinate value is due to the right hand double touch. For example, when the right-hand dual touch reference range is set to the area of X axis +60 and Y axis +80 in the compensator 124, the X-axis coordinate value of the second point coordinate value is greater than +60 and Y-axis. If the coordinate value is larger than +80, it is determined as the error coordinate value due to the double touch.

The true coordinate value generated in step S112 is supplied to the coordinate display unit 116. Accordingly, the coordinate display unit 116 positions the mouse cursor at the point of the true coordinate value or executes a command corresponding to the true coordinate value.

On the other hand, when the dual touch determination signal WTS input from the touch panel controller 70 is off, the compensator 124 proceeds to step S116 and supplies the second point coordinate value to the coordinate display unit 116. Accordingly, accordingly, the coordinate display unit 116 positions the mouse cursor at the point of the second point coordinate value or executes a command corresponding to the coordinate value.

On the other hand, if it is determined in step S122 that the user selects the left hand mode, the compensator 124 proceeds to step S124 and enters the memory 122 through the ADC 72 from the touch panel 50 by the user's touch. The first point coordinate value stored in) is received.

Then, when the second point coordinate value is not input within the unit time in step S126, the compensator 124 proceeds to step S128 and touches the first point coordinate value input in step S124 by a pen (finger). It is recognized as a supply to the coordinate display unit 116. Accordingly, the coordinate display unit 116 positions the mouse cursor at the point of the first point coordinate value or executes a command corresponding to the first point coordinate value.

On the other hand, if the second point coordinate value is input within the unit time in step S126, the compensator 124 proceeds to step S130 and the double touch determination signal from the double touch determination unit 102 of the touch panel controller 70. It is determined whether (WTS) is on. In this case, when the input dual touch determination signal WTS is on, the compensator 124 detects a difference between the first point coordinate value and the second point coordinate value and detects the difference between the first point coordinate and the first point coordinate by the step S132. The true coordinate value is generated by compensating the value or the second point coordinate value. That is, the compensator 124 may determine that the input second point coordinate value is an error coordinate value due to left hand double touch when the input second point coordinate value is smaller than the X axis coordinate value of the preset left hand double touch reference range and larger than the Y axis coordinate value. Done. For example, when the right-hand dual touch reference range is set to the area of X axis +60 and Y axis +80 in the compensator 124, the X-axis coordinate value of the second point coordinate value is greater than +60 and Y-axis. If the coordinate value is larger than +80, it is determined as the error coordinate value due to the double touch.

The true coordinate value generated in step S132 is supplied to the coordinate display unit 116. Accordingly, the coordinate display unit 116 positions the mouse cursor at the point of the true coordinate value or executes a command corresponding to the true coordinate value.

On the other hand, when the dual touch determination signal WTS input from the touch panel controller 70 is off, the compensator 124 proceeds to step S136 and supplies the second point coordinate value to the coordinate display unit 116. Accordingly, accordingly, the coordinate display unit 116 positions the mouse cursor at the point of the second point coordinate value or executes a command corresponding to the coordinate value.

As described above, in the touch panel device and its driving method according to the present invention, the touch panel controller determines a hand touch dual touch by a pen (finger) touch and a palm, and the processing speed is increased according to the determined double touch determination signal. By using the central system of the fast system, the dual touch can be compensated for quick and accurate coordinate values.

In addition, the touch panel device and the driving method thereof according to the present invention distinguish the hand touch by the pen (finger) touch and the palm and compensate for the coordinate value due to the hand touch according to the right hand mode or the left hand mode when the double touch occurs. Regardless of the user and the left hand user, accurate coordinate values for a pen (finger) touch can be detected quickly and accurately.

Those skilled in the art will appreciate that various changes and modifications can be made without departing from the technical spirit of the present 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.

Claims (20)

A touch panel for generating a coordinate signal for a user's touch point; A touch panel controller which controls driving of the touch panel, detects a coordinate value of the coordinate signal, and generates a dual touch determination signal by recognizing a dual touch generated from the touch panel; And receiving a detected coordinate value from the touch panel controller and compensating an error coordinate value due to the dual touch in response to the dual touch determination signal to detect a coordinate value of authenticity. Panel unit. The method of claim 1, The touch panel controller A coordinate detector detecting a coordinate value with respect to the coordinate signal; A dual touch determination unit receiving a coordinate value from the coordinate detection unit and recognizing the dual touch within a unit time to generate a dual touch determination signal; And a transmitter configured to transmit the detected coordinate values and the dual touch determination signal to the system. The method of claim 2, The dual touch determination unit determines whether the second point coordinate value is a coordinate value due to the dual touch when the first point coordinate value and the second point coordinate value are input from the touch panel within a preset unit time. Touch panel device, characterized in that for generating a signal. The method of claim 3, wherein The dual touch determination unit, And generating the dual touch determination signal when the second point coordinate value is included in a preset dual touch region. The method of claim 3, wherein The dual touch determination unit, And generating the dual touch determination signal when the second point coordinate value exceeds a preset reference value. The method of claim 3, wherein The dual touch determination unit, And generating the dual touch determination signal when the second point coordinate value is included in a preset dual touch area and exceeds a preset reference value. The method according to any one of claims 4 and 6, The dual touch determination unit, And generating the dual touch determination signal when the second point coordinate value is included in a preset right hand dual touch region or left hand dual touch region. The method according to any one of claims 5 and 6, The reference value is a touch panel device, characterized in that the minimum value between the touch point by the pen (finger) and the hand touch point is double touch. The method of claim 1, The system, Central processing unit, A touch panel driver for receiving a coordinate value and a dual touch determination signal transmitted from the touch panel controller and detecting the coordinate value of the authenticity according to the dual touch determination signal using the central processing unit; And an execution unit which displays the true coordinate value or executes a command corresponding to the true coordinate value. The method of claim 9, The touch panel driver, A receiver which receives a coordinate value transmitted from the touch panel controller; A memory for storing the coordinate values received by the receiver; And a compensation unit configured to receive the coordinate values stored in the memory and detect the coordinate values of the authenticity according to the dual touch determination signal. The method of claim 10, When the second point coordinate value is determined to be dual touch by the double touch determination signal, the compensator compensates the second point coordinate value by the difference value with the first point coordinate value by using the central processing unit. A touch panel device, characterized in that to calculate the true coordinate value. Detecting a first point coordinate value with respect to the first touch point of the touch panel; Detecting a second point coordinate value for a second touch point from the touch panel within a unit time; Generating a dual touch determination signal by determining whether the dual touch is made by using the first point coordinate value and the second point coordinate value; Transmitting the first point coordinate value, the second point coordinate value, and the dual touch determination signal to a system; Receiving the first point coordinate value, the second point coordinate value, and the dual touch determination signal; And detecting a true coordinate value by compensating an error coordinate value due to the double touch in response to the double touch determination signal. The method of claim 12, The determining of the dual touch may include determining the dual touch when the second point coordinate value is out of the dual touch reference range. The method of claim 13, The double touch reference range is a minimum range between a coordinate value of a touch point by a pen or a finger and a coordinate value generated by a double touch. The method of claim 14, The determining of the dual touch may include determining whether the user is in a right hand use mode or a left hand use mode. The method of claim 15, And determining the second touch when the second point coordinate value is out of a preset right hand double touch reference range when it is determined that the right hand use mode is determined in the mode determining step. . The method of claim 16, And the right hand double touch reference range is a forward minimum value between a coordinate value of a touch point by a pen or a finger and a coordinate value generated by double touch. The method of claim 16, The determining of the dual touch And determining the dual touch when the X and Y axis coordinate values among the second point coordinate values are larger than the X axis and Y axis reference coordinate values of the right hand dual touch reference range. Driving method. The method of claim 15, And determining the second touch when the second point coordinate value is out of a preset left hand double touch reference range when it is determined that the left hand use mode is determined in the mode determining step. The method of claim 12, Compensating the double touch And compensating for the second point coordinate value by a difference value between the first point coordinate value and the second point coordinate value.