KR100481220B1 - Touch panel apparatus and method for driving the same - Google Patents

Abstract

The present invention provides a touch panel device and a driving method thereof capable of distinguishing a double touch and preventing an error coordinate value from being calculated.

According to an aspect of the present invention, a touch panel device includes: a touch panel generating a coordinate signal for a touch point of a user; A touch that controls the operation of the touch panel and calculates coordinate values for the coordinate signal, and recognizes the dual touch generated from the touch panel to compensate or remove the error coordinate value due to the double touch, and calculates and outputs the true coordinate value. It is characterized by including a panel controller.

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 preventing the generation of error coordinate values due to double touch.

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 installed on the surface of the screen as an input device 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, and controls the driving of the touch panel 10 and calculates coordinate values according to the coordinate signal from the touch panel 10. A touch panel controller 30 that calculates and outputs the output to the system 40, and a system 40 for executing 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, and as the lower substrate 16, a transparent film of the same material as the upper substrate 12, Glass substrates or plastic substrates are used. As the first and second transparent conductive layers 14 and 18, any one of indum-tin-oxide (ITO), indum-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. A Y electrode bar 19 is further provided. The X electrode bar 15 supplies a first X electrode bar 15A for supplying a driving voltage Vcc and a ground voltage GND to supply current to the first transparent conductive layer 14 in the X-axis direction. It consists of the 2nd X electrode bar 15B. The Y electrode bar 19 supplies 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.

In the touch panel 10, when a pen (finger) presses the upper film 12 and the first transparent conductive layer 14 contacts the second transparent conductive layer 18, the resistance value is changed 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 connected to the X-axis. It outputs as a coordinate signal, and outputs a Y-axis coordinate signal through the 2nd Y electrode bar 19B connected to the 2nd transparent conductive layer 18. FIG. 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.

In detail, 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 have the first and second transparent conductive layers. The X-axis coordinate signal is output through the second X electrode bar 15B in response to the resistance value changed by the point where the 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 varied by the contact points 14 and 18.

Here, the first switch 24 supplies the driving voltage Vcc to the first X electrode bar 15A or the first Y electrode bar 19A in response to the control signal CS from the touch panel controller 30. Done. 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. .

The touch panel controller 30 calculates and supplies coordinate values according to the X-axis and Y-axis coordinate signals of the touch point supplied from the touch panel 10 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 calculates a 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 combines the X-axis and Y-axis coordinate data sequentially supplied from the ADC 32 to calculate the coordinate value of the touch point of the touch panel 10, and calculates the 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 supplies 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 for 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 calculating the coordinate values in the touch panel controller 30, for example, 3.4 ms, the touch panel controller 30 may later determine the coordinates of the second input coordinate signal. Since the value is calculated and supplied to the system 40, the system 40 commits 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 distinguishing double touch and preventing the error coordinate value from being calculated.

Another object of the present invention is to provide a touch panel device and a driving method thereof capable of preventing the error coordinate value from being calculated regardless of a user using the right hand or the left hand by distinguishing the dual touch according to the right hand mode and the left hand mode. .

In order to achieve the above object, the touch panel device according to the present invention comprises a touch panel for generating a coordinate signal for the user's touch point; A touch that controls the operation of the touch panel and calculates coordinate values for the coordinate signal, and recognizes the dual touch generated from the touch panel to compensate or remove the error coordinate value due to the double touch, and calculates and outputs the true coordinate value. It is characterized by including a panel controller.

When the first point coordinate value is input from the touch panel and the second point coordinate value is input within a preset unit time, the touch panel controller compares the second point coordinate value with a preset double touch reference range to generate a double touch. It is characterized by determining whether the coordinate value.

The touch panel controller may be configured to determine the error coordinate value when the second point coordinate value is out of the dual touch reference range.

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 touch panel controller may determine an error coordinate value when the second point coordinate value is out of a preset right hand double touch reference range.

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 touch panel controller may determine an error coordinate value when the X and Y axis coordinate values of the second point coordinate value are larger than the X and Y axis reference coordinate values of the right hand dual touch reference range.

The touch panel controller may determine an error coordinate value when the second point coordinate value is out of a preset left hand double touch reference range.

The X-axis coordinate value of the left hand double touch reference range is a negative minimum value between the X-axis coordinate value of the touch point by the pen or finger and the X-axis coordinate value generated by the double touch, and the Y-axis coordinate value is And a Y-axis coordinate value of the touch point and a Y-axis coordinate value generated by the double touch.

The touch panel controller determines the error coordinate value when the X-axis coordinate value of the second point coordinate value is smaller than the X-axis reference coordinate value of the left-hand dual touch reference range and when the Y-axis coordinate value is larger than the Y-axis reference coordinate value. Characterized in that.

When it is determined that the second point coordinate value is an error coordinate value, the touch panel controller compensates the second point coordinate value by a difference value from the first point coordinate value.

When the user selects the right hand mode, the touch panel controller may subtract the difference value from the second point coordinate value to compensate for the second point coordinate value.

When the user selects the left hand mode, the touch panel controller adds a difference value between the first point X axis coordinate value and the second point Y axis coordinate value to the second point X axis coordinate value. Compensating the second point coordinate value by subtracting the difference value of.

If it is determined that the second point coordinate value is an error coordinate value, the touch panel controller removes the second point coordinate value and outputs a previously detected first point coordinate value.

According to an aspect of the present invention, there is provided a method of driving a touch panel device, the method including: detecting a first point coordinate value of a first touch point of the touch panel; Determining whether a second point coordinate value for the second touch point is detected from the touch panel within a unit time; Determining whether an error coordinate value due to the double touch is compared with a preset dual touch reference range when the second point coordinate value is detected in the step; If it is determined in the step that the error coordinate value, characterized in that it comprises the step of calculating the coordinate value of the authenticity by compensating or removing the second point coordinate value.

The determining of the error coordinate value may include determining the error coordinate value when the second point coordinate value is out of the double touch reference range.

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 driving method of the present invention may further include determining whether the user is in a right hand mode or a left hand mode.

The determining of the error coordinate value when it is determined as the right hand use mode in the mode determining step includes determining an error coordinate value when the second point coordinate value is out of a preset right hand double touch reference range. do.

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 error coordinate value includes determining the error coordinate value when the X and Y axis coordinate values of the second point coordinate values are larger than the X and Y axis reference coordinate values of the right hand double touch reference range. It features.

The determining of the error coordinate value when it is determined as the left hand using mode in the mode determining step includes determining the error coordinate value when the second point coordinate value is out of a preset left hand double touch reference range. do.

The X-axis coordinate value of the left hand double touch reference range is a negative minimum value between the X-axis coordinate value of the touch point by the pen or finger and the X-axis coordinate value generated by the double touch, and the Y-axis coordinate value is And a Y-axis coordinate value of the touch point and a Y-axis coordinate value generated by the double touch.

The determining of the error coordinate value may include the error when the X-axis coordinate value of the second point coordinate value is smaller than the X-axis reference coordinate value of the left hand double touch reference range and the Y-axis coordinate value is larger than the Y-axis reference coordinate value. And determining the coordinate value.

The compensating of the error coordinate value may include compensating the second point coordinate value by a difference value between the first point coordinate value and the second point coordinate value.

Compensating the error coordinate value when it is determined in the right hand use mode includes subtracting the difference value from the second point coordinate value to compensate for the second point coordinate value.

Compensating the error coordinate value when it is determined in the left-hand use mode, adds a difference value between the first point X axis coordinate value to a second point X axis coordinate value, and the first point at a second point Y axis coordinate value. And subtracting the difference value with the Y-axis coordinate value to compensate for the second point coordinate value.

The removing of the error coordinate value may include removing the second point coordinate value determined as the error coordinate value and outputting a previously detected first 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 a 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 calculates a coordinate value according to the coordinate signal from the touch panel 50. A touch panel controller 70 for 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 joined 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 made 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 indium-tin-oxide (ITO), indium-zine-oxide (IZO), and indum-tin-zine-oxide (ITZO) is 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. It consists of the 2nd X electrode bar 55B. The Y electrode bar 59 supplies 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.

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 is connected to the first transparent conductive layer 54 by the second X electrode bar 55B connected to the X or the X-axis. It outputs as a coordinate signal, and outputs a Y-axis coordinate signal via the 2nd Y electrode bar 19B connected to the 2nd transparent conductive layer 58. FIG. 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 ground voltage GND are supplied to the X electrode bar 55 through the first and second switches 64 and 66, the touch panel 50 may have the first and second transparent conductive materials. The X-axis coordinate signal is output through the second X electrode bar 55B in response to the resistance variable by the point where the layers 54 and 58 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 value changed by the point where the 54 and 58 contacts.

Here, the first switch 64 supplies the driving voltage Vcc to the first X electrode bar 55A or the first Y electrode bar 59A in response to the control signal CS from the touch panel controller 70. Done. 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. .

The touch panel controller 70 calculates and supplies coordinate values according to the X-axis and Y-axis coordinate signals of the touch point supplied from the touch panel 50 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. In particular, the touch panel controller 70 distinguishes between a pen (finger) touch, a pen (finger) touch, and a dual touch by a hand touch on the touch panel 50 to compensate or remove an error coordinate value due to the double touch. (Finger) The exact coordinates of the touch point are calculated.

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 into digital data. The microcomputer 74 calculates 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 the interface unit which relays the coordinate value from the microcomputer 74 and supplies it 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 combines the X-axis and Y-axis coordinate data sequentially supplied from the ADC 72 to calculate coordinate values of the touch point of the touch panel 50, and calculates the coordinate values through the interface unit 76. To the system 80. In this case, the microcomputer 74 outputs coordinate values calculated every fixed unit time, for example, 3.4 ms to 5 ms. In addition, 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.

In particular, the microcomputer 74 distinguishes the coordinate value generated by the pen (finger) touch on the touch panel 50 from the coordinate value generated by the double touch to compensate or remove the coordinate value generated by the double touch. ) The exact coordinate value for the touch point is calculated.

To this end, the microcomputer 74 detects the first point coordinate value and then inputs the second point coordinate value from the touch panel 50 via the ADC 32 within the unit time for detecting the next coordinate value. It is determined whether the point coordinate value is out of a preset dual touch reference range. Here, the dual touch reference range means the minimum range between the pen (finger) touch coordinate value at which the dual touch can occur and the intermediate coordinate value due to the palm touch. For example, the X-axis coordinate value of the reference value is about 60, Y Set the axis coordinates to about 80.

 In this case, the dual touch reference range set in the microcomputer 74 may vary depending on whether the user uses the right hand mode 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 shown in FIG. 4, 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 dual touch is relatively large located to the right of the first point X axis coordinate value for the pen (finger) touch point PT. You can see that it has a value. On the other hand, when the user uses the left hand, the second point X axis coordinate value due to the double 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.

5, the hand touch point HP is positioned 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 dual touch is relatively large located below the first point Y axis coordinate value for the pen (finger) touch point PT. You can see that it has a value. Even when the user uses the left hand, the second point Y-axis coordinate value due to the double 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. 6, the lower right area in which the X and Y axis coordinates of the touch area TA of the touch panel 50 have a relatively large value is the right hand dual touch area ( RHTA). On the other hand, when the user uses the left hand, as shown in FIG. 7, 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 dual touch area LHTA.

As a result, when the dual touch reference range is set to an area of about 60 in the X-axis coordinate value and 80 degrees in the Y-axis coordinate value as described above, the right-hand dual touch reference range is up to about X axis +60 degree and Y axis It becomes an area up to about +80, and the left hand dual touch reference range can be set to an area up to about X axis -60 and up to about Y axis +80.

If the second point coordinate value exceeds the aforementioned double touch reference range, the microcomputer 74 recognizes the second point coordinate value as an error coordinate value due to the double touch. Subsequently, the microcomputer 74 ignores the second point coordinate value recognized as the error coordinate value and transmits the previously detected first point coordinate value to the system 80, or the first point coordinate value and the second point coordinate value. The difference value is calculated and the second point coordinate value is compensated by the difference value and transmitted to the system 80.

The system 80 senses a coordinate value supplied from the touch panel controller 70 and executes a corresponding command by the coordinate value or executes an application program related thereto. The system 80 also supplies power signals and video data necessary for a display (not shown) on 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 correct coordinate value for the pen (finger) touch by compensating or ignoring the coordinate value due to the dual touch by distinguishing the pen (finger) touch from the dual touch.

8 is a flowchart illustrating a method of driving the touch panel device illustrated in FIG. 3, which is performed by the microcomputer 74 of the touch panel controller 70 illustrated in FIG. 3.

First, the microcomputer 74 is initialized in step 100 (S100) and then determines whether the user selected the right hand mode or the left hand mode in steps 102 (S102) and 122 (S122). Prior to this step, the user selects a right handed or left handed mode.

First, 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 on 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 102 (S102) that the user selects the right hand mode, the microcomputer 74 proceeds to step 104 (S104) and receives a first input from the touch panel 50 through the ADC 72 by the user's touch. The point coordinate value is detected. At this time, as described above, the microcomputer 74 detects the first point coordinate value by combining the X axis coordinate value and the Y axis coordinate value sequentially input with respect to the first touch point of the user.

Subsequently, the microcomputer 74 detects whether the second point coordinate value via the ADC 72 is detected from the touch panel 50 within the unit time of transmitting the coordinate value detected by the system 80 in step 106 (S106). You will be judged. At this time, as described above, when the X-axis coordinate value and the Y-axis coordinate value are sequentially input to the second touch point of the user, the microcomputer 74 combines them to detect the second point coordinate value.

If the second point coordinate value is not detected in the unit time in step 106 (S106), the microcomputer 74 proceeds to step 108 (S108) and converts the first point coordinate value detected in the step 104 (S104) into a pen ( It is recognized as a touch point by a finger) and transmitted to the system 80 through the interface unit 76 and returned.

On the other hand, when the second point coordinate value is detected within the unit time in step 106 (S106), the microcomputer 74 proceeds to step 110 (S110) and the input second point coordinate value is the coordinate due to the right hand dual touch. It is determined whether it is a value. In this case, when the detected second point coordinate value is out of the preset right hand double touch reference range as described above, the microcomputer 74 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 an area of up to X axis +60 and Y axis +80 in the microcomputer 74, the X axis coordinate value among the second point coordinate values is larger than +60 and Y axis coordinates. If the value is larger than +80, it is determined as the error coordinate value due to the double touch.

If the second point coordinate value is determined as the coordinate value due to the right-handed dual touch, that is, the error coordinate value between the pen (finger) touch point and the hand touch point, the microcomputer 74 proceeds to step 112 (S112). In operation, the difference between the first point coordinate value and the second point coordinate value is calculated, and the second point coordinate value is compensated by the difference value, or the second point coordinate value is removed. Here, since the second point coordinate value due to the right hand double touch has the X axis and Y axis coordinate values larger than the first point coordinate value, as described above, the microcomputer 74 has the first point from the second point coordinate value. The difference between the coordinate value and the second point coordinate value is subtracted to compensate for the second point coordinate value.

In operation 114 (S114), the microcomputer 74 removes the compensated second point coordinate value or the second point coordinate value and recognizes the remaining first point coordinate value as an accurate coordinate value by touching a pen (finger). The unit 76 transmits and returns to the system 80.

On the other hand, in step 110 (S110), the microcomputer 74 touches the second point coordinate value when the detected second point coordinate value does not deviate from the preset right hand double touch reference range as described above. Judging by the coordinate value by. Then, the microcomputer 74 proceeds to step 116 (S116) to transmit and return the second point coordinate value recognized as the coordinate value by the touch of the pen (finger) to the system 80 through the interface unit 76 and return. do.

On the other hand, if it is determined in step 122 (S122) that the user has selected the left hand mode, the microcomputer 74 proceeds to step 124 (S124) and is input through the ADC 72 from the touch panel 50 by the user's touch. The first point coordinate value is detected. At this time, as described above, the microcomputer 74 detects the first point coordinate value by combining the X axis coordinate value and the Y axis coordinate value sequentially input with respect to the first touch point of the user.

Subsequently, the microcomputer 74 detects whether the second point coordinate value via the ADC 72 is detected from the touch panel 50 within the unit time of transmitting the coordinate value detected by the system 80 in step 126 (S126). You will be judged. At this time, as described above, when the X-axis coordinate value and the Y-axis coordinate value are sequentially input to the second touch point of the user, the microcomputer 74 combines them to detect the second point coordinate value.

If the second point coordinate value is not detected within the unit time in step 126 (S126), the microcomputer 74 proceeds to step 128 (S128) and converts the first point coordinate value detected in the step 124 (S124) into a pen ( It is recognized as a touch point by a finger) and transmitted to the system 80 through the interface unit 76 and returned.

On the other hand, if the second point coordinate value is detected within the unit time in step 126 (S126), the microcomputer 74 proceeds to step 130 (S130) and the input second point coordinate value is the coordinate due to the left hand double touch. It is determined whether it is a value. In this case, the microcomputer 74 determines that the detected second point coordinate value is an error coordinate value due to left hand double touch when the detected 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 left-hand dual touch reference range is set in the microcomputer 74 to an area of X axis -60 and Y axis +80, the X axis coordinate value among the second point coordinate values is smaller than -60 and the Y axis coordinate. If the value is larger than +80, it is determined as the error coordinate value due to the double touch.

In this step, when it is determined that the second point coordinate value is the coordinate value due to the left hand double touch, that is, the error coordinate value between the pen (finger) touch point and the hand touch point, the microcomputer 74 performs step 132 (S132). Proceed to to calculate the difference between the first point coordinate value and the second point coordinate value and to compensate for the second point coordinate value by the difference value, or to remove the second point coordinate value. Here, the second point coordinate value due to the left hand dual touch has an X axis coordinate value smaller than the first point coordinate value and a large Y axis coordinate value as described above. Therefore, the microcomputer 74 adds the difference value between the X-axis coordinate value of the second point and the first-axis X-axis coordinate value, and the Y-axis coordinate value of the second point corresponds to the first-axis Y-axis coordinate value. The difference value is subtracted to compensate for the second point coordinate value.

In operation 134 (S134), the microcomputer 74 removes the compensated second point coordinate value or the second point coordinate value and recognizes the remaining first point coordinate value as an accurate coordinate value by touching a pen (finger). The unit 76 transmits and returns to the system 80.

On the other hand, in step 130 (S130), the microcomputer 74 touches the second point coordinate value when the detected second point coordinate value does not deviate from the preset left hand double touch reference range as described above. Judging by the coordinate value by. Then, the microcomputer 74 proceeds to step 136 (S136) to transmit and return the second point coordinate value recognized as the coordinate value by the touch of the pen (finger) to the system 80 through the interface unit 76 and return. do.

As described above, the touch panel device and the driving method thereof according to the present invention distinguish the pen (finger) touch from the dual touch to compensate or ignore the error coordinate value due to the double touch, thereby accurately correcting the coordinates of the pen (finger) touch. Can be calculated.

In addition, the touch panel device and its driving method according to the present invention distinguish the pen (finger) touch and the dual touch according to whether the user is in the right hand mode or the left hand mode, and compensates the coordinate values due to the double touch in the right hand mode or the left hand mode. By ignoring or ignoring, accurate coordinate values for the pen (finger) touch can be calculated regardless of the right hand user and the left hand user.

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.

1 is a view showing a conventional touch panel device.

2 illustrates a dual touch phenomenon in a touch panel.

3 is a diagram illustrating a touch panel device according to an exemplary embodiment of the present invention.

4 is a diagram illustrating X-axis detection coordinates of a double touch of a right-handed user in the touch panel illustrated in FIG. 3.

FIG. 5 is a diagram illustrating Y-axis detection coordinates of a double touch of a right-handed user in the touch panel illustrated in FIG. 3.

FIG. 6 illustrates a right hand dual touch area in the touch panel shown in FIG. 3; FIG.

FIG. 7 illustrates a left hand dual touch area in the touch panel shown in FIG. 3. FIG.

FIG. 8 is a flowchart illustrating a method of driving a touch panel device according to an exemplary embodiment of the present disclosure 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: X electrode bar 15A: first X electrode bar

15B: second X electrode bar 19: Y electrode bar

19A: 1st Y electrode bar 19B: 2nd Y electrode bar

Claims (28)

A touch panel for generating a coordinate signal for a user's touch point; By controlling the operation of the touch panel and calculating the coordinate value for the coordinate signal, and by recognizing the double touch generated in the touch panel to compensate or remove the error coordinate value due to the double touch to calculate the true coordinate value It is provided with the touch panel controller which outputs, The touch panel controller When the first point coordinate value is input from the touch panel and the second point coordinate value is input within a preset unit time, the second point coordinate value is compared with a preset double touch reference range to determine whether the coordinate value is due to the double touch. The touch panel device, characterized in that the judgment. delete The method of claim 1, The touch panel controller And determining the error coordinate value when the second point coordinate value is out of the dual touch reference range. The method of claim 3, wherein The reference range is a touch panel device, 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 double touch. The method of claim 3, wherein The touch panel controller And when the second point coordinate value is out of a preset right hand dual touch reference range, determining the error coordinate value. The method of claim 5, wherein And the right hand double touch reference range is a forward minimum value between the coordinate value of the touch point by the pen or finger and the coordinate value generated by the double touch. The method of claim 5, wherein The touch panel controller And an X and Y axis coordinate value among the second point coordinate values is determined as the error coordinate value when the X and Y axis coordinate values are larger than the X and Y axis reference coordinate values of the right hand dual touch reference range. The method of claim 3, wherein The touch panel controller And determining the error coordinate value when the second point coordinate value is out of a preset left hand dual touch reference range. The method of claim 8, The X-axis coordinate value of the left hand double touch reference range is a negative minimum value between the X-axis coordinate value of the touch point by the pen or finger and the X-axis coordinate value generated by the double touch, and the Y-axis coordinate value is And a Y-axis coordinate value of the touch point caused by the touch point and a Y-axis coordinate value generated by a double touch. The method of claim 8, The touch panel controller If the X-axis coordinate value of the second point coordinate value is smaller than the X-axis reference coordinate value of the left-hand double touch reference range and the Y-axis coordinate value is larger than the Y-axis reference coordinate value is determined as the error coordinate value Touch panel device. The method of claim 1, The touch panel controller And when the second point coordinate value is determined to be an error coordinate value, compensating the second point coordinate value by a difference value from the first point coordinate value. The method of claim 11, If the user selects the right hand mode, the touch panel controller And subtracting the difference value from the second point coordinate value to compensate for the second point coordinate value. The method of claim 8, If the user selects left hand mode, the touch panel controller The difference value with the first point X axis coordinate value is added to the second point X axis coordinate value, and the difference value with the first point Y axis coordinate value is subtracted from the second point Y axis coordinate value. Touch panel device, characterized in that for compensating the coordinate value. The method of claim 2, The touch panel controller And when the second point coordinate value is determined to be an error coordinate value, removing the second point coordinate value and outputting the previously detected first point coordinate value. Detecting a first point coordinate value with respect to the first touch point of the touch panel; Determining whether a second point coordinate value for a second touch point is detected from the touch panel within a unit time; Determining whether the second point coordinate value is an error coordinate value due to the double touch by comparing with a preset dual touch reference range; Calculating a true coordinate value by compensating or removing the second point coordinate value if it is determined as an error coordinate value in the step; The determining of the error coordinate value And determining the error coordinate value when the second point coordinate value is out of the dual touch reference range. delete The method of claim 15, The dual 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 15, And determining whether the user is in a right hand use mode or a left hand use mode. The method of claim 18, The step of determining the error coordinate value when it is determined in the mode determination step that the right hand use mode And determining the error coordinate value when the second point coordinate value is out of a preset right hand dual touch reference range. The method of claim 19, 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 a double touch. The method of claim 19, The determining of the error coordinate value And determining the error coordinate value when the X and Y axis coordinate values among the second point coordinate values are larger than the X and Y axis reference coordinate values of the right hand dual touch reference range. Method of driving. The method of claim 18, The step of determining the error coordinate value when it is determined that the left hand using mode in the mode determination step And determining the error coordinate value when the second point coordinate value is out of a preset left hand dual touch reference range. The method of claim 22, The X-axis coordinate value of the left hand double touch reference range is a negative minimum value between the X-axis coordinate value of the touch point by the pen or finger and the X-axis coordinate value generated by the double touch, and the Y-axis coordinate value is And a forward minimum value between the Y-axis coordinate value of the touch point and the Y-axis coordinate value generated by the double touch. The method of claim 18, The determining of the error coordinate value Determining the error coordinate value when the X-axis coordinate value of the second point coordinate value is smaller than the X-axis reference coordinate value of the left hand double touch reference range and the Y-axis coordinate value is larger than the Y-axis reference coordinate value. Method of driving a touch panel device comprising a. The method of claim 18, Compensating the error coordinate value And compensating for the second point coordinate value by a difference value between the first point coordinate value and the second point coordinate value. The method of claim 25, Compensating the error coordinate value when it is determined that the right hand mode is used Subtracting the difference value from the second point coordinate value to compensate for the second point coordinate value. The method of claim 18, Compensating the error coordinate value when determined as the left hand use mode The difference value with the first point X axis coordinate value is added to the second point X axis coordinate value, and the difference value with the first point Y axis coordinate value is subtracted from the second point Y axis coordinate value. Compensating a coordinate value comprising the steps of driving the touch panel device. The method of claim 15, Removing the error coordinate value And removing the second point coordinate value determined as the error coordinate value and outputting the previously detected first point coordinate value.