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WO2010071285A1 - Dispositif d'entrée comportant un écran tactile résistif et procédé pour le calcul du point tactile de l'écran - Google Patents

Dispositif d'entrée comportant un écran tactile résistif et procédé pour le calcul du point tactile de l'écran Download PDF

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Publication number
WO2010071285A1
WO2010071285A1 PCT/KR2009/003586 KR2009003586W WO2010071285A1 WO 2010071285 A1 WO2010071285 A1 WO 2010071285A1 KR 2009003586 W KR2009003586 W KR 2009003586W WO 2010071285 A1 WO2010071285 A1 WO 2010071285A1
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WIPO (PCT)
Prior art keywords
delay time
clock signal
electrode
sampling clock
delay
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Ceased
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PCT/KR2009/003586
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English (en)
Korean (ko)
Inventor
정덕영
이방원
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Atlab Inc
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Atlab Inc
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Publication of WO2010071285A1 publication Critical patent/WO2010071285A1/fr
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    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/045—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using resistive elements, e.g. a single continuous surface or two parallel surfaces put in contact
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated
    • H03K17/96—Touch switches
    • H03K17/9645—Resistive touch switches
    • H03K17/9647—Resistive touch switches using a plurality of detectors, e.g. keyboard

Definitions

  • the present invention relates to an input device having a resistive touch panel, and more particularly, to an input device capable of determining a contact position using a delay time difference of a measurement signal applied to a touch panel, and a method of calculating a contact position of the device. It is about.
  • Personal computers, portable communication devices, and other information processing devices use various input devices to perform functions. Recently, many input devices including a touch panel have been used as such input devices.
  • the touch panel is installed on the surface of a display device such as a CRT, LCD, PDP, EL (electroluminescence) and the like to detect its position by contact, and is used on a screen of an image display device such as a computer or a portable information terminal. It can be installed on the screen using a hand or pen without a keyboard or mouse, and can be made using ITO (Indium-Tin Composite Oxide) film.
  • a display device such as a CRT, LCD, PDP, EL (electroluminescence) and the like to detect its position by contact
  • a screen of an image display device such as a computer or a portable information terminal.
  • ITO Indium-Tin Composite Oxide
  • the touch panel is capacitive and ultrasonic, in addition to a resistive touch panel formed by combining two pads of resistive components that are separated by a spacer and arranged to be in contact with each other by pressing. , Optical (infrared) sensor, and electromagnetic induction.
  • the upper sheet pad 11 includes first and second electrodes 111 and 112 at both ends of the upper sheet pad 11 in a first direction (for example, the x-axis direction), and the lower sheet pad 12 includes third and fourth electrodes 121 and 122 at both ends of the lower sheet pad 12 in a second direction (eg, y-axis direction).
  • the touch panel 10 has a variable magnitude of resistance between the contact position and each of the electrodes 111, 112, 121, and 122 according to the contact position. That is, when a contact object (for example, a hand or a pen) contacts an arbitrary contact position of the upper sheet pad 11, the upper sheet pad 11 and the lower sheet pad 12 are energized at the contact position, and thus In each of the upper sheet pad 11 and the lower sheet pad 12, the magnitude of the resistance between the contact position and each of the electrodes 111, 112, 121, and 122 to which the voltage is applied is determined according to the contact position. .
  • a contact object for example, a hand or a pen
  • the first and second switches 21 and 22 sequentially connect the power supply 30, the upper seat pad 11, and the lower seat pad 12, and the third switch 23 is connected to the voltage meter 40.
  • the lower seat pad 12 and the upper seat pad 11 are sequentially connected.
  • the first, second, and third switches 21, 22, and 23 may be configured to be controlled by a controller (not shown).
  • FIG. 2 is an equivalent circuit diagram for describing an operation of an input device having a conventional resistive touch panel shown in FIG. 1, where T is a contact position and R1A is a first electrode of the upper sheet pad 11.
  • R4B represents an equivalent resistance between the fourth electrode 122 and the contact position T, and R2B represents an equivalent resistance between the third electrode 121 and the contact position T of the lower sheet pad 12, respectively.
  • the first voltage Vy for determining the position in the y-axis direction is measured. That is, the first switch 21 connects the power supply 30 and a, the second switch 22 connects the ground voltage and a, and the third switch 23 connects the voltage meter 40 and c. do. Therefore, the voltage of the power source 30 is applied to the fourth electrode 122 of the lower sheet pad 12, the ground voltage is applied to the third electrode 121 of the lower sheet pad 12, and the voltage meter 40 ) Is connected between the ground voltage and the contact position (T) to measure the magnitude of the first voltage (Vy). If the magnitude of the voltage of the power supply 30 is Vb, the magnitude of the first voltage Vy is determined by the following equation.
  • the second voltage Vx for determining the position in the x-axis direction is measured. That is, the first switch 21 connects the power supply 30 and c, the second switch 22 connects the ground voltage and c, and the third switch 23 connects the voltage meter 40 and a. do. Therefore, the voltage of the power source 30 is applied to the second electrode 112 of the upper sheet pad 11, the ground voltage is applied to the first electrode 111 of the upper sheet pad 11, and the voltage meter 40 ) Is connected between the ground voltage and the contact position (T) to measure the second voltage (Vx). If the magnitude of the voltage of the power supply 30 is Vb, the magnitude of the second voltage Vx is determined by the following equation.
  • the first voltage Vy is proportional to the equivalent resistance R2B between the third electrode 121 of the lower sheet pad 12 and the contact position T, and the resistance R2B is formed of the lower sheet pad 12. It is proportional to the distance between the three electrodes 121 and the contact position (T). Accordingly, the first voltage Vy is proportional to the distance between the third electrode 121 of the lower sheet pad 12 and the contact position T.
  • the first input voltage Vy is measured by the voltage meter 40.
  • the magnitude of one voltage Vy was converted to digital using an analog-to-digital converter (not shown, hereinafter referred to as an A / D converter), and the position of the contact position on the y-axis was determined using the converted digital value.
  • the second voltage Vx is proportional to the equivalent resistance R1A between the first electrode 111 of the upper sheet pad 11 and the contact position T, and the resistance R1A is the upper sheet pad 11. It is proportional to the distance between the first electrode 111 of the contact position (T). Accordingly, the second voltage Vx is proportional to the distance between the first electrode 111 of the upper sheet pad 11 and the contact position T.
  • the second input voltage measured by the voltage meter 40 is measured. The magnitude of the two voltages (Vx) was converted to digital using an A / D converter, and the position on the x-axis of the contact position was determined using the converted digital value.
  • the conventional input device since the power supplied from the power supply 30 is consumed through the resistors R2A and R2B, or R1A and R1B, there is a problem in that power consumption is high.
  • an A / D converter is required to determine the contact position, and the performance of the A / D converter, that is, the resolution of the A / D converter determines the accuracy of the contact position that can be understood by the input device. That is, in the conventional input device, the A / D converter must be operated at high speed to increase the operation speed, and the resolution of the A / D converter must be increased to increase the accuracy of the input device. To operate at high speed requires a lot of power, there is a problem that it is difficult to increase the operating speed. In addition, in the case of the conventional input device, there is a problem that it takes a long time to determine the contact position at low power for the reasons described above.
  • An object of the present invention is to provide an input device having a resistive touch panel capable of operating at high speed and minimizing power consumption.
  • Another object of the present invention is to provide a method for calculating a contact position of an input device for achieving the above object.
  • An input device including a resistive touch panel of the present invention for achieving the above object includes a plurality of electrodes, and the magnitude of the resistance between each of the plurality of electrodes and the contact position is variable according to a contact position.
  • a touch panel a sampling clock signal generator for outputting a sampling clock signal, a first switch for sequentially applying the sampling clock signal to some of the electrodes, and at least one of the electrodes
  • a delay element for delaying a signal of the delayed node, a delay time measurement unit for measuring and outputting delay time differences between the signal of the delay node and the sampling clock signal, and calculating the coordinates of the contact position by inputting the delay time differences It characterized in that it comprises a coordinate calculation unit.
  • a first aspect of the delay time measuring unit of the input device of the present invention for achieving the above object is a delay pulse output unit for detecting the level of the signal of the delay node and outputting a pulse signal, and the pulse signal and the sampling clock signal It is characterized in that it comprises a comparison unit for measuring the delay time difference between the pulse signal and the sampling clock signal by inputting to output the delay time difference between the signal of the delay node and the sampling clock signal.
  • the second type of the delay time measuring unit of the input device of the present invention for achieving the above object determines whether the sampling clock signal is input to the delay time measuring unit through the delay node, and determines the detection signal according to the determination result.
  • An output signal detection section and a control code in response to the detection signal until the pulse width of the sampling clock signal reaches a threshold, and the control code when the pulse width of the sampling clock signal reaches a threshold.
  • a control unit for outputting a corresponding delay time difference between the signal of the delay node and the sampling clock signal, wherein the sampling clock signal generation unit outputs a pulse width of the sampling clock signal output in response to the control code. It is characterized by varying.
  • the first switch of the first aspect of the input device of the present invention for achieving the above object sequentially applies the sampling clock signal to the first electrode and the third electrode, the input device is When the sampling clock signal is applied to the first electrode, the third electrode and the fourth electrode are sequentially connected to the delay node, and the first switch applies the sampling clock signal to the third electrode. And a second switch that sequentially connects the first electrode and the second electrode with the delay node.
  • the second switch of the first form of the input device of the present invention for achieving the above object further connects the second electrode with the delay node when the first switch applies the sampling clock signal to the first electrode. And when the first switch applies the sampling clock signal to the third electrode, additionally connects the fourth electrode to the delay node, and wherein the second switch is not touched. And additionally connecting an electrode or the fourth electrode with the delay node.
  • the delay time measuring unit of the first aspect of the input device of the present invention for achieving the above object is the first switch to apply the sampling clock signal to the first electrode and the second switch is the third electrode and the delay
  • the delay time difference when the node is connected is measured and output to the coordinate calculation unit as a first delay time difference, wherein the first switch applies the sampling clock signal to the first electrode, and the second switch is the first switch.
  • the delay time difference between the four electrodes and the delay node is measured and output as a second delay time difference to the coordinate calculator, and the first switch applies the sampling clock signal to the third electrode.
  • the coordinate calculating unit measures a difference in delay time when a switch connects the first electrode and the delay node to a third delay time difference.
  • a fourth delay time difference by measuring the delay time difference when the first switch applies the sampling clock signal to the third electrode and the second switch connects the second electrode and the delay node. Outputs to the coordinate calculator, and measures the delay time when the first switch applies the sampling clock signal to the first electrode and the second switch connects the second electrode and the delay node. The delay when the fifth delay time is output to the coordinate calculation unit, and the first switch applies the sampling clock signal to the third electrode and the second switch connects the fourth electrode and the delay node. The time difference is measured and output to the coordinate calculation unit as a sixth delay time difference.
  • the delay time measuring unit of the first aspect of the input device of the present invention for achieving the above object is characterized by measuring and outputting the difference between the fifth and sixth delay time.
  • the coordinate calculation unit of the first form of the input device of the present invention for achieving the above object is inputted the difference of the first to sixth delay time to the magnitude of the resistance between each of the first to fourth electrodes and the contact position It is characterized by calculating the coordinates of the contact position by calculating each.
  • the coordinate calculation unit of the first aspect of the input device of the present invention for achieving the above object is a difference value between the first delay time difference and the second delay time difference, and the third delay time difference and the fourth delay time difference. And calculating the difference values of the resistors and dividing each of the difference values by the fifth delay time difference and the sixth delay time difference to calculate the magnitude of the resistance.
  • the coordinate calculation unit of the first aspect of the input device of the present invention for achieving the above object is characterized in that it is determined that the contact is not contacted when the first to fourth delay time difference is more than a predetermined value.
  • a first aspect of the input device of the present invention for achieving the above object is a first resistor connected between the first switch and the sampling clock signal generator, and a second connected between the second switch and the delay node. And a resistor, wherein the first resistor and the second resistor are formed of the same material as the first sheet pad and the second sheet pad.
  • the second sheet pad may have a quadrangular shape, and the output electrode may be connected to the delay node.
  • the first switch of the second form of the input device of the present invention for achieving the above object is characterized in that to sequentially apply the sampling clock signal to the first to fourth electrodes.
  • the delay time measuring unit of a second aspect of the input device of the present invention measures a first delay by measuring the difference in delay time when the first switch applies the sampling clock signal to the first electrode. Outputting the difference to the coordinate calculator by a time difference, measuring the delay time when the first switch applies the sampling clock signal to the second electrode, and outputting the difference to the coordinate calculator by a second delay time;
  • the first switch measures the delay time when the sampling clock signal is applied to the third electrode and outputs the delayed time difference to the coordinate calculation unit at a third delay time. Measuring the difference in delay time when applied to the four electrodes and outputs to the coordinate calculation unit as a fourth delay time difference And a gong.
  • the coordinate calculation unit of the second form of the input device of the present invention for achieving the above object is to input the first to fourth delay time differences to each of the magnitude of the resistance between each of the first to fourth electrodes and the contact position. It is characterized in that to calculate the coordinates of the contact position by calculating.
  • the coordinate calculation unit of a second form of the input device of the present invention for achieving the above object calculates difference values of each of the first to fourth delay time differences, and divides each of the calculated difference values by the resistance. It is characterized by calculating the size of each.
  • the coordinate calculation unit of the second aspect of the input device of the present invention for achieving the above object is characterized in that it is determined that the contact is not contacted when the first to fourth delay time difference is more than a predetermined value.
  • a second aspect of the input device of the present invention for achieving the above object is a first resistor connected between the first switch and the sampling clock signal generator, and a second resistor connected between the output electrode and the delay node. And the first resistor and the second resistor are formed of the same material as the first sheet pad and the second sheet pad.
  • the touch panel of the third form of the input device of the present invention for achieving the above object is extended in a first direction, disposed in a second direction orthogonal to the first direction, and a corresponding electrode among the plurality of electrodes.
  • a second sheet pad having second touch pads.
  • the first switch of the third form of the input device of the present invention for achieving the above object is sequentially connected to the electrodes connected to one end of the plurality of first touch pads and the electrodes connected to one end of the plurality of second touch pads.
  • the sampling clock signal is applied to the input device, and the input device applies the sampling clock signal when the first switch applies the sampling clock signal to the electrode connected to one end of one of the plurality of first touch pads.
  • the electrodes connected to both ends of second touch pads are sequentially connected to the delay node, and the sampling clock signal is connected to the electrode connected to one end of one of the second touch pads of the plurality of second touch pads.
  • the delay time measuring unit of the third form of the input device of the present invention for achieving the above object is the sampling of the first switch is an electrode connected to one end of one of the plurality of first or second touch pads; Applying a clock signal, and measuring and outputting the delay time differences for each case where the second switch connects both ends of one of the plurality of second or first touch pads and the delay node; It is characterized by.
  • the coordinate calculation unit of the third form of the input device of the present invention for achieving the above object inputs the delay time differences to calculate the magnitude of the resistance between each of the electrodes and the contact position to determine the coordinates of the contact position. It is characterized by calculating.
  • a third aspect of the input device of the present invention for achieving the above object is a first resistor connected between the first switch and the sampling clock signal generator, and a second connected between the second switch and the delay node.
  • the resistor may further include a resistor, and the first resistor and the second resistor may be formed of the same material as the first touch pads and the second touch pads.
  • the contact position calculation method of the input device provided with the resistive touch panel of the present invention for achieving the above another object is provided with a plurality of electrodes, the contact position between each of the plurality of electrodes and the contact position
  • To calculate the size of each of the resistors characterized in that it includes a coordinate calculation step of calculating coordinates of the contact position.
  • a first aspect of the delay time measuring step of the contact position calculation method of the present invention for achieving the above another object is a delay pulse output step of detecting a level of a signal of the delay node and outputting a pulse signal; And comparing the delay time difference between the sampling clock signal and outputting the difference between the delay node signal and the sampling clock signal.
  • the second form of the delay time measuring step of the contact position calculation method of the present invention for achieving the above another object is to determine whether the sampling clock signal is input to the delay time measuring unit through the delay node, A signal detecting step of outputting a detection signal according to the present invention; and varying a control code until the pulse width of the sampling clock signal reaches a threshold in response to the detection signal, and when the pulse width of the sampling clock signal reaches a threshold. And a control step of outputting a delay time difference corresponding to the control code of a delay time difference between the signal of the delay node and the sampling clock signal, wherein the sampling clock signal generation step outputs the response code in response to the control code.
  • the pulse width of the sampling clock signal is varied.
  • a first aspect of the method for calculating a contact position of an input device of the present invention for achieving the above another object is a first sheet pad having a first electrode and a second electrode, the touch panel is disposed at both ends of the first direction, and
  • the applying of the sampling clock signal may include converting the sampling clock signal into the first electrode. And sequentially applying to the third electrode, and wherein the delaying step sequentially connects the third and fourth electrodes and the delay node when the sampling clock signal is applied to the first electrode, and the sampling clock signal.
  • the third electrode it characterized in that the first and second electrodes and the delay node are sequentially connected.
  • the delaying step of the first form of the method for calculating the contact position of the input device of the present invention for achieving the another object further comprises connecting the second electrode and the delay node when the sampling clock signal is applied to the first electrode.
  • the sampling clock signal is applied to the third electrode, the fourth electrode and the delay node may be additionally connected.
  • the delay time measuring step of the first form of the contact position calculation method of the input device of the present invention for achieving the above another object is that the sampling clock signal is applied to the first electrode and the third electrode and the delay node is connected The delay time difference is measured and output as a first delay time difference, and the delay time difference is measured when the sampling clock signal is applied to the first electrode and the fourth electrode is connected to the delay node. 2 delay time difference, and the sampling clock signal is applied to the third electrode, the delay time difference when the first electrode and the delay node is measured and output as a third delay time difference, the sampling The difference in delay time when a clock signal is applied to the third electrode and the second electrode is connected to the delay node is measured.
  • the coordinate calculation step of the first form of the method for calculating the contact position of the input device of the present invention for achieving the another object is to calculate a first difference value by subtracting the first delay time difference and the second delay time difference; A difference value calculating step of calculating a second difference value by subtracting the third delay time difference and the fourth delay time difference, calculating a first ratio value by dividing the first difference value and the fifth delay time difference; A ratio value calculating step of calculating a second ratio value by dividing the second difference value and the sixth delay time difference, and each of the first to fourth electrodes using the first ratio value and the second ratio value; And a resistance magnitude calculation step of calculating each magnitude of the resistance of the contact location, and a coordinate value calculation step of calculating the coordinates of the contact location by using each magnitude of the resistance.
  • a second form of the method for calculating the contact position of the input device of the present invention for achieving the above another object is a rectangular first sheet pad having an output electrode formed on the edge of the touch panel connected to the delay node, and each corner
  • the sampling clock signal applying step sequentially applies the sampling clock signal to the first to fourth electrodes, wherein the coordinates
  • the calculating step may include calculating the coordinates of the contact position by inputting the delay time differences to calculate magnitudes of the resistances of the first to fourth electrodes and the contact position.
  • the delay time measuring step of the second aspect of the method for calculating the contact position of the input device of the present invention for achieving the above another object may be performed by measuring the delay time difference when the sampling clock signal is applied to the first electrode. Outputting the signal at one delay time, measuring the delay time difference when the sampling clock signal is applied to the second electrode, and outputting the second delay time difference, and applying the sampling clock signal to the third electrode. Measuring the delay time difference and outputting it as a third delay time difference, and measuring the delay time difference when the sampling clock signal is applied to the fourth electrode and outputting the fourth delay time difference. do.
  • the coordinate calculation step is a difference value calculation step of calculating the difference values of each of the first to fourth delay time differences, the difference A ratio value calculating step of dividing each of the values by each other to calculate a ratio value of each of the difference values, and calculating each magnitude of a resistance between each of the first to fourth electrodes and the contact position using the ratio value And a coordinate value calculating step of calculating a coordinate of the contact position using each of the resistance magnitude calculation step and the magnitude of the resistance.
  • the input device including the resistive touch panel and the method for calculating the contact position of the device can operate at high speed while minimizing power consumption.
  • FIG. 1 is a diagram illustrating a configuration of an input device including a conventional resistive touch panel.
  • FIG. 2 is an equivalent circuit diagram for explaining the operation of the conventional input device shown in FIG.
  • FIG. 3 is a diagram illustrating a configuration of an embodiment of an input device including a resistive touch panel according to the present invention.
  • FIG. 4 is an equivalent circuit diagram for explaining the operation of one embodiment of the input device of the present invention shown in FIG.
  • FIG. 5 is a diagram showing the configuration of another embodiment of an input device including the resistive touch panel of the present invention.
  • FIGS. 6 to 8 are views for explaining the operation of another embodiment of the input device of the present invention shown in Figure 5, Figure 6 is an upper seat pad, Figure 7 is a lower seat pad, Figure 8 is an equivalent circuit diagram To indicate.
  • FIG. 9 is a view showing the configuration of another embodiment of an input device including a resistive touch panel of the present invention.
  • FIG. 10 and 11 each show an embodiment of the upper seat pad and the lower seat pad of the touch panel of another embodiment of the input device of the present invention shown in FIG.
  • FIG. 12 illustrates another embodiment of a sampling clock signal generator and a delay time measurement unit of an input device including the resistive touch panel of the present invention shown in FIGS. 3, 5, and 9.
  • FIG. 3 shows a configuration of an embodiment of an input device having a resistive touch panel according to the present invention, wherein the touch panel 10, the first switch 51, the second switch 52, and the sampling clock signal are generated.
  • a unit 60, a delay time measuring unit 70, a coordinate calculating unit 80, and a delay element 90 are configured, and the touch panel 10 includes an upper sheet pad 11 and a lower sheet pad ( 12).
  • the upper sheet pad 11 includes first and second electrodes 111 and 112 at both ends of the upper sheet pad 11 in a first direction (for example, the x-axis direction), and the lower sheet pad 12 includes third and fourth electrodes 121 and 122 at both ends of the lower sheet pad 12 in a second direction (eg, y-axis direction).
  • the delay element 90 may be configured with a capacitor C connected between the delay node A and the ground voltage.
  • Ra represents a first resistor connected between the first switch 51 and the sampling clock signal generator 60
  • Rb represents a second resistor connected between the second switch 52 and the delay node A.
  • FIG. Each resistance is shown. That is, in an exemplary embodiment of the input device including the resistive touch panel of the present invention, the input device may further include a first resistor Ra and a second resistor Rb.
  • the function of the touch panel 10 is the same as that described with reference to FIG. 1.
  • the sampling clock signal generator 60 generates the sampling clock signal clk and outputs the sampling clock signal clk to the first switch 51 and the delay time measuring unit 70.
  • the first switch 51 receives the sampling clock signal clk output from the sampling clock signal generator 60 and the first electrode 111 and the lower sheet pad 12 of the upper sheet pad 11 of the touch panel 10. ) Is sequentially applied to the third electrode 121.
  • the second switch 52 is the third electrode of the lower sheet pad 12 when the first switch 51 applies the sampling clock signal clk to the first electrode 111 of the upper sheet pad 11. 121 and the fourth electrode 122 are sequentially connected to the delay node A, and the first switch 51 applies the sampling clock signal clk to the third electrode 121 of the lower sheet pad 12. In this case, the first electrode 111 and the second electrode 112 of the upper sheet pad 11 are sequentially connected to the delay node A.
  • the second switch 52 is the second electrode of the upper sheet pad 11 when the first switch 51 applies the sampling clock signal clk to the first electrode 111 of the upper sheet pad 11.
  • the lower sheet pad 12 is additionally connected to the delay node A and the first switch 51 when the first switch 51 applies the sampling clock signal clk to the third electrode 121 of the lower sheet pad 12. It may be configured to additionally connect the fourth electrode 122 and the delay node (A) of.
  • the operation of additionally connecting the second electrode 112 or the fourth electrode 122 and the delay node A to the second switch 52 may be configured to be performed when a contact object is not in contact with the touch panel. have.
  • the delay element 90 delays the signal of the delay node A.
  • the delay element 90 may be configured with a capacitor C connected between the delay node A and the ground voltage, in which case, the signal clk_d of the delay node A may be the first.
  • An electrode to which the sampling clock signal is applied by the switch 51 that is, the first electrode 111 or the third electrode 121 and an electrode connected to the delay node A by the second switch 52 ( That is, the size of the resistance between the third electrode 121 or the fourth electrode 122, or the first electrode 111 or the second electrode 112 and the capacitance of the capacitor C are delayed.
  • the delay time of the signal clk_d of the delay node A relative to the sampling clock signal clk is the magnitude of the resistance between the electrode to which the sampling clock signal is applied and the contact position, and the contact position and the delay node A. It is determined by the sum of the magnitudes of the resistances between the electrodes connected to and the capacitance of the capacitor.
  • the delay time measuring unit 70 inputs the sampling clock signal clk and the signal clk_d of the delay node A, which are output from the sampling clock signal generator 60, to receive the sampling clock signal clk and the delay node A.
  • the delay time difference of the signal clk_d is measured and the delay time difference td is output.
  • the signal clk_d of the delay node A includes a resistance of the touch panel in which the clock signal clk output from the sampling clock signal generator 60 varies according to the first resistance Ra and the contact position.
  • the signal is delayed by the second resistor Rb and the capacitor C by a predetermined time.
  • the delay time of the signal clk_d of the delay node A varies depending on the contact position. Is determined by the resistance of the touch panel.
  • the coordinate calculation unit 80 inputs the delay time difference Td output from the delay time measurement unit 70 to calculate and output the coordinates of the contact position.
  • the input device of the present invention may be configured to additionally include the first resistor Ra and the second resistor Rb. That is, if a contact object is in contact with the edge of the touch panel, the magnitude of the resistance of the touch panel, that is, the magnitude of the resistance between the first switch 51 and the second switch 52 becomes zero. In this case, since the sampling clock signal clk is directly applied to the delay node A without passing through the resistor, the input device may malfunction. Accordingly, the input device of the present invention may be configured to additionally include the first resistor Ra and the second resistor Rb to prevent the above malfunction.
  • the upper seat pad 11 and the lower seat pad 12 may be configured to be interchanged with each other.
  • FIG. 4 is an equivalent circuit diagram illustrating an operation of an embodiment of an input device having a resistive touch panel of the present invention shown in FIG. 3, where T is a contact position and R1A is an upper sheet pad 11.
  • the equivalent resistance between the fourth electrode 122 of the pad 12 and the contact position T, R2B represents the equivalent resistance between the third electrode 121 and the contact position T of the lower sheet pad 12, respectively. Indicates.
  • the delay time measuring unit 70 may include a delay pulse output unit 71 and a comparator 72.
  • the delay pulse output unit 71 inputs the signal clk_d of the delay node A, and senses the level of the signal clk_d of the delay node A (for example, the voltage level of the delay node A). To generate and output a pulse signal pclk_d. That is, the delay time difference between the sampling clock signal clk and the pulse signal pclk_d has the same value as the delay time difference between the sampling clock signal clk and the signal clk_d of the delay node A.
  • the reference level of the delay pulse output unit 71 may be fixed at a predetermined level.
  • the delay time difference may be expressed as the product of the magnitude of the resistance (ie, the sum of the resistance of the touch panel varying according to the first resistance Ra, the second resistance Rb, and the contact position) and the capacitance of the capacitor C. Can be.
  • the comparator 72 inputs the pulse signal pclk_d outputted from the delay pulse output unit 71 and the sampling clock signal clk outputted from the sampling clock signal generator 70, and samples the pulse signal pclk_d and the sampling signal.
  • the calculated delay time difference td is calculated by calculating the delay time difference td of the clock signal clk. Of course, in calculating the delay time difference td, a noise filtering process may be added.
  • the first switch 51 is connected to a so that the sampling clock signal clk is applied to the first electrode 111, and the second switch 52 is sequentially connected to b and d to the third electrode 121. ) And the fourth electrode 122 are sequentially connected to the delay node A.
  • the delay time differences between the sampling clock signal clk and the signal clk_d of the delay node A may be measured.
  • the measured delay time differences td are output to the coordinate calculation unit 80.
  • the first switch 51 is connected to b so that the sampling clock signal clk is applied to the third electrode 121, and the second switch 52 is sequentially connected to a and c so that the first electrode ( 111 and the second electrode 112 are sequentially connected to the delay node A.
  • the delay time differences between the sampling clock signal clk and the signal clk_d of the delay node A that is, the delay time differences between the sampling clock signal clk and the pulse signal pclk_d, are delay time measuring units. Measured by 70, the measured delay time differences td are output to the coordinate calculation unit 80. The above operation is performed while the contact object is in contact with the contact position.
  • the first switch 51 is connected to a so that the sampling clock signal clk is applied to the first electrode 111, and the second switch 52 is connected to c so that the second electrode 112 is delayed.
  • the first switch 51 is connected to b so that the sampling clock signal clk is applied to the third electrode 121, and the second switch 52 is connected to d to connect to the node A.
  • the electrode 122 is connected to the delay node A.
  • the delay time differences between the sampling clock signal clk and the signal clk_d of the delay node A that is, the delay time differences between the sampling clock signal clk and the pulse signal pclk_d may be measured.
  • Measured by 70 the measured delay time differences td are output to the coordinate calculation unit 80. This operation can be performed in a state where the contact object is not in contact with the contact position.
  • the coordinate calculator 80 calculates the coordinates of the contact position T by calculating the magnitudes of the resistors R1A, R1B, R2A, and R2B using the input delay time difference td.
  • the delay time difference between the clock signal clk and the signal clk_d of the delay node A (that is, the delay time difference between the sampling clock signal clk and the pulse signal pclk_d) is referred to as a second delay time difference t2.
  • a delay time difference (ie, sampling) between the sampling clock signal clk and the signal clk_d of the delay node A when the first switch 51 is connected to b and the second switch 52 is connected to a.
  • the delay time difference between the clock signal clk and the pulse signal pclk_d is referred to as the third delay time difference t3
  • the first switch 51 is connected to b and the second switch 52 is connected to c.
  • Sample The delay time difference between the clock signal clk and the signal clk_d of the delay node A (that is, the delay time difference between the sampling clock signal clk and the pulse signal pclk_d) is referred to as a fourth delay time difference t4.
  • the sixth delay time difference t6 is a delay time difference (ie, a delay time difference between the sampling clock signal clk and the pulse signal pclk_d) between the sampling clock signal clk and the signal clk_d of the delay node A.
  • the first to sixth delay time differences t1 to t6 measured by the delay time measuring unit 70 may be determined by the following equation.
  • C denotes the capacitance of the capacitor C
  • each of Ra, Rb, R1A, R1B, R2A, and R2B represents the size of each of the resistors.
  • the coordinate calculator 80 calculates the sizes of the resistors R1A, R1B, R2A, and R2B by inputting the first to sixth delay time differences t1 to t6.
  • the sizes of the resistors R1A, R1B, R2A, and R2B may be calculated by the following equation.
  • the coordinate calculation unit 80 first calculates the difference values t1-t2 by subtracting the first delay time difference t1 and the second delay time difference t2, and then compares the third delay time difference t3 with the third delay time difference t3.
  • the difference value t3-t4 is calculated by subtracting the fourth delay time difference t4.
  • Each of the difference values (t1-t2) and (t3-t4) may be expressed by the following equation.
  • the coordinate calculation unit 80 divides the difference values t1-t2 by the fifth delay time difference t5, and divides the difference values t3-t4 by the sixth delay time difference t6. Calculate ((t1-t2) / t5, (t3-t4) / t6). By calculating the ratio values, the capacitance of the capacitor C can be eliminated.
  • Each of the ratio values (t1-t2) / t5 and (t3-t4) / t6 may be expressed by the following equation.
  • the coordinate calculator 80 calculates the size of each of the resistors R1A, R1B, R2A, and R2B by combining the above equations.
  • the magnitudes of the first resistor Ra and the second resistor Rb are values determined at design time, and the sum of the resistors R1A and R1B R1A + R1B is the entire upper sheet pad 11. Is a value determined at design time, and the sum of resistors R2A and R2B (R2A + R2B) is a value determined at design time as the total resistance value of the lower sheet pad 12. Therefore, by using the values determined during the design and the equations, the size of each of the resistors R1A, R1B, R2A, and R2B can be known.
  • the size of the resistor R1A is proportional to the distance between the contact position T and the left electrode of the upper sheet pad 11, and the size of the resistor R2B is between the contact position and the lower electrode of the lower sheet pad 12. Proportional to distance. Therefore, the coordinate calculator 80 may calculate the coordinates of the contact position T from the sizes of the resistors R1A, R1B, R2A, and R2B.
  • the first resistor Ra, the second resistor Rb, the sum of the resistors R1A and R1B, and the sum of the resistors R2A and R2B are values determined at design time as described above. Some errors may occur for process or other reasons. Therefore, the input device of the present invention may be configured to correct the error through a calibration operation.
  • the input device of the present invention is produced by using the same ITO film as the first sheet (Ra) and the second sheet (Rb) of the upper sheet pad 11 and the lower sheet pad 12 to reduce the resistance value according to temperature.
  • the change may be configured to be offset by the above equations.
  • the coordinate calculator 80 may be configured to determine that the touch panel 10 is not touched when the first to fourth delay time differences t1 to t4 are equal to or greater than a predetermined value.
  • the delay pulse output part 71 is a control signal input from the outside.
  • the signal clk_d of the delay node A may be delayed by a time corresponding to the control signal to output the pulse signal pclk_d.
  • the control signal may be configured to be input by a user, or may be configured to be input from a controller (not shown) of the input device.
  • the additional delay due to the parasitic capacitance between the touch panel 10 and the display device (not shown) positioned below the touch panel 10 may be removed or additionally performed by controlling the additional delay time at the delay pulse output unit 71. Compensation results can be compensated for.
  • the reference level of the delay pulse output unit 71 may also be configured to vary in response to a control signal input from the outside or to have hysteresis characteristics. In this case, that is, by controlling the reference level or having a hysteresis characteristic, the influence of noise that may be generated at the delay node A may be minimized.
  • FIG. 5 shows a configuration of another embodiment of an input device including a resistive touch panel according to the present invention, wherein the touch panel 13, the first switch 53, the sampling clock signal generator 60, and the delay time are illustrated in FIG. It consists of the measuring part 70, the coordinate calculation part 81, and the delay element 90, and the touch panel 13 is comprised by the upper seat pad 14 and the lower seat pad 15.
  • the upper sheet pad 14 has an output electrode 141 connected to the delay node A and formed at an edge thereof, and the lower sheet pad 15 has first to fourth electrodes 151 ⁇ formed at a corner thereof. 154).
  • the delay element 90 may be configured with a capacitor C connected between the delay node A and the ground voltage.
  • the upper sheet pad 14 and the lower sheet pad 15 may have a rectangular shape.
  • FIG. 5 another embodiment of the input device of the present invention shown in FIG. 5 is similar to that shown in FIG. 3, and includes a first resistor and an output connected between the first switch 53 and the sampling clock signal generator 60. It may be configured to further include a second resistor connected between the electrode 141 and the delay node (A). In this case, the first and second resistors may be formed of the same material as the upper sheet pad 14 and the lower sheet pad 15.
  • sampling clock signal generator 60 The functions of the sampling clock signal generator 60, the delay time measuring unit 70, and the delay element 90 are the same as those described with reference to FIG. 3.
  • the touch panel 13 has a variable magnitude of resistance between the contact position and the electrodes according to the contact position.
  • the upper sheet pad 14 has a variable magnitude of resistance between the contact position and the output electrode 141 according to the contact position, and the lower sheet pad 15 has the contact position and the first to fourth electrodes ( 151-154) The magnitude of the resistance between each is variable.
  • the first switch 53 sequentially applies the sampling clock signal clk output from the sampling clock signal generator 60 to the first to fourth electrodes 151 to 154 of the lower sheet pad 15.
  • the coordinate calculation unit 81 inputs a delay time difference td output from the delay time measuring unit 70 to between the contact position and each of the first to fourth electrodes 151 to 154 of the lower sheet pad 15. Calculate the coordinates of the contact location by calculating each of the magnitudes of the resistance.
  • the positions of the upper seat pad 14 and the lower seat pad 15 may be interchanged.
  • FIG. 6 to 8 are views for explaining the operation of another embodiment of the input device having the resistive touch panel of the present invention shown in FIG. 5, FIG. 6 is an upper seat pad 14, and FIG.
  • the lower sheet pad 15 and FIG. 8 show an equivalent circuit diagram, respectively.
  • T denotes a contact position
  • R1T denotes an equivalent resistance between the contact position T and the electrode 151
  • R2T denotes an equivalent resistance between the contact position T and the electrode 152
  • R3T denotes an equivalent resistance between the contact position T and the electrode 153
  • R4T denotes an equivalent resistance between the contact position and the electrode 154
  • Rs denotes a contact at the upper sheet pad 14.
  • Equivalent resistance between the position and the electrode 141, RiT represents one of the four resistors R1T to R4T in the lower sheet pad 15, respectively.
  • each of the resistors R1T to R4T is proportional to the distance between the contact position and the corresponding one of the four electrodes 151 to 154, and the size of the resistor Rs depends on the contact position T. That is, the size of the resistor Rs has the largest value when the contact position T is the center of the touch panel 13, and has a smaller value as the contact position T approaches the edge of the touch panel 13. .
  • the magnitude of the resistance Rs is (the distance from the left edge to the contact position T / the total distance in the x-axis direction) and p (the distance from the lower edge to the contact position T / y direction When the total distance) is q, it is proportional to (p (1-p) x q (1-q)).
  • the delay time measuring unit 70 illustrated in FIGS. 5 and 8 may be configured as a delay pulse output unit and a comparison unit as shown in FIG. 4.
  • FIGS. 5 to 8 An operation of another embodiment of an input device including a resistive touch panel according to the present invention will be described with reference to FIGS. 5 to 8 as follows.
  • the first switch 53 sequentially applies the sampling clock signal clk to the first to fourth electrodes 151 to 154, and the delay time measuring unit 70 performs the delay node A for each case.
  • the delay differences between the signal clk_d and the sampling clock signal clk are measured, and the measured delay differences td are output.
  • the coordinate calculator calculates and outputs the coordinate CV of the contact position by inputting the delay time differences td.
  • the signal clk_d of the delay node A is connected between the contact position T and the electrode 141 and the resistance RiT between one of the electrodes 151 to 154. Is determined by the sum of the resistances of Rs and the capacitance of the capacitor C. That is, the delay time difference when the switch 53 applies the sampling clock signal clk to the first electrode 151 is referred to as a first delay time difference t1 ′, and the switch 53 is a sampling clock signal ( The delay time difference when applying clk to the second electrode 152 is referred to as the second delay time difference t2 ', and the switch 53 applies the sampling clock signal clk to the third electrode 153.
  • each of the first to fourth delay time differences t1' to t4 'measured by the delay time measuring unit 70 may be represented by the following equation.
  • the first to fourth delay time differences t1 ′ to t4 ′ are input to the coordinate calculator 81.
  • the coordinate calculator 81 calculates a difference value of each of the first to fourth delay time differences t1 ′ to t4 ′, and divides the calculated difference values from each other to determine the sizes of the resistors R1T to R4T. Can be calculated That is, the sizes of the resistors R1T to R4T may be calculated by the following equation.
  • the coordinate calculation unit 81 first subtracts each of the inputted first to fourth delay time differences t1 'to t4', and then calculates the difference values (t1'-t2 ') and (t1'-t3'. ), (t1'-t4 '), (t2'-t3'), (t2'-t4 ') and (t3'-t4')).
  • Calculated difference values ((t1'-t2 '), (t1'-t3'), (t1'-t4 '), (t2'-t3'), (t2'-t4 '), (t3'- t4 ')) may be represented by the following equations.
  • the coordinate calculation unit 81 performs the difference values (t1'-t3 '), (t1'-t4'), (t2'-t3 '), (t2'-t4'), and (t3 ').
  • -t4 ')) by dividing each of the difference values ((t1'-t2')) by the ratio values (((t1'-t3 ') / (t1'-t2')), (( t1'-t4 ') / (t1'-t2')), ((t2'-t3 ') / (t1'-t2')), ((t2'-t4 ') / (t1'-t2') ), ((t3'-t4 ') / (t1'-t2'))).
  • the coordinate calculation unit 81 performs the difference values (t1'-t2 '), (t1'-t3'), (t1'-t4 '), (t2'-t3'), and (t2'- By dividing each of t4 ') and (t3'-t4')), the capacitance of the capacitor C can be removed.
  • Each of the ratio values may be expressed by the following equation.
  • the coordinate calculation unit 81 calculates the size of each of the resistors R1T to R4T by combining the equations and calculates the coordinates of the contact position T from the size of each of the resistors R1T to R4T. do.
  • the coordinate of the contact position T can be calculated by calculating only three sizes of the resistors R1T to R4T.
  • another embodiment of the input device of the present invention calculates the size of all of the resistors R1T to R4T to remove the effect of temperature or the like that can vary the size of the resistor as the ratio of the resistors R1T to R4T. It may be configured.
  • the coordinate calculator 81 may be configured to determine that the touch panel 13 is not touched when the first to fourth delay time differences t1 ′ to t4 ′ are equal to or greater than a predetermined value.
  • FIG. 9 illustrates another embodiment of an input device including a resistive touch panel according to the present invention, wherein the touch panel 16, the first switch 57, the second switch 58, and the sampling clock signal are generated.
  • the unit 60, the delay time measuring unit 70, and the coordinate calculating unit 82 are configured, and the touch panel 16 is configured by the upper seat pad 17 and the lower seat pad 18.
  • FIG. 10 and 11 show embodiments of the upper seat pad 17 and the lower seat pad 18 of the touch panel 16 of another embodiment of the input device of the present invention shown in FIG. 9, respectively.
  • the upper sheet pad 17 of another embodiment of the input device of the present invention extends in the x-axis direction and is arranged in the y-axis direction with a plurality of first touch pads Py1 and Py2.
  • the lower sheet pad 18 extends in the y-axis direction and includes a plurality of second touch pads Px1, Px2,... Arranged in the x-axis direction. That is, FIG. 10 illustrates a case in which the upper sheet pad 17 includes twelve first touch pads Py1, Py2, ..., and in FIG. 11, the lower sheet pad 18 includes fifteen second second pads. Although the case of having the touch pads Px1, Px2, ...
  • each of the upper sheet pad 17 and the lower sheet pad 18 may have as many first touch pads and second touch pads as necessary. It may be configured to have.
  • the upper sheet pad 17 may be configured with only one first touch pad
  • the lower sheet pad 18 may be configured with two or more second touch pads.
  • the delay time measuring unit 70 may be composed of a delay pulse output unit 71 and a comparator 72 as shown in FIG.
  • the first switch 57 receives the sampling clock signal clk output from the sampling clock signal generator 60 and the plurality of left electrodes ⁇ a1: an> and the lower sheet pad 18 of the upper sheet pad 17. ) Is sequentially applied to the plurality of lower electrodes ⁇ b1: bm>.
  • the second switch 58 may include a lower sheet pad ( The plurality of upper electrodes ⁇ d1: dm> and the plurality of lower electrodes ⁇ b1: bm> and the delay node A are sequentially connected, and the first switch 58 is connected to the lower sheet pad.
  • the sampling clock signal clk When the sampling clock signal clk is applied to one of the plurality of lower electrodes ⁇ b1: bm> of (18), the plurality of left electrodes ⁇ a1: an> and the plurality of left electrodes of the upper sheet pad 17 are provided. Right electrodes ⁇ c1: cn> and the delay node A are sequentially connected.
  • the first switch 57 applies the sampling clock signal clk to the first electrode ⁇ a1> of the plurality of left electrodes ⁇ a1: an> of the upper sheet pad 17, and the second The switch 58 sequentially connects the plurality of upper electrodes ⁇ d1: dm> and the plurality of lower electrodes ⁇ b1: bm> and the delay node A of the lower sheet pad 18.
  • the delay time measuring unit 70 measures the delay time difference td for each case, and outputs the measured delay time difference td to the coordinate calculation unit 82.
  • the coordinate calculation unit 82 calculates resistance values using the input delay time difference td, and calculates coordinates of the contact position using the calculated resistance values.
  • the first switch 57 applies a sampling clock signal to the first electrode ⁇ b1> of the plurality of lower electrodes ⁇ b1: bm> of the lower sheet pad 18, and the second switch ( 58 sequentially connects the plurality of left electrodes ⁇ a1: an> and the plurality of right electrodes ⁇ c1: cn> and the delay node A of the upper sheet pad.
  • the delay time measuring unit 70 measures and outputs the delay time difference td for each case, and the coordinate calculating unit 82 calculates the coordinates using the delay time difference td. This process is repeated until the first switch 57 applies the sampling clock signal to the last electrode ⁇ bm> of the plurality of lower electrodes ⁇ b1: bm> of the lower sheet pad 18.
  • the coordinate calculator 82 may be configured to determine that the touch panel 16 is not touched when the delay time difference td is equal to or greater than a predetermined value.
  • the upper sheet pad 17 and / or the lower sheet pad 18 may include a plurality of touch pads.
  • the touch panel can be detected even if two or more contact positions are present at the same time.
  • the contact position can be detected until two contact positions exist at the same time.
  • the contact position can be detected until four contact positions are simultaneously provided.
  • the input device including the resistive touch panel of the present invention can minimize power consumption and detect the contact position at high speed. It is also possible to detect two or more contact positions at the same time as needed.
  • FIGS. 3, 5, and 9. illustrates another embodiment of the sampling clock signal generator 60 and the delay time measuring unit 70 of the input device including the resistive touch panel of the present invention shown in FIGS. 3, 5, and 9. To indicate.
  • the sampling clock signal generator 65 may be configured to vary the pulse width of the sampling clock signal clk output in response to the control code code output from the delay time measuring unit 75.
  • the delay time measuring unit 75 inputs the signal clk_d of the delay node A to determine whether the sampling clock signal clk is transmitted to the delay time measuring unit 75 through the delay node A.
  • the control code may be varied according to a determination result, and the delay time difference td corresponding to the control code may be output.
  • the signal detector 76 of the delay time measuring unit 75 inputs the signal clk_d of the delay node A to determine whether the sampling clock signal clk is transmitted through the delay node A, and determines According to the result, it may be configured to output the detection signal det.
  • the control unit 77 of the delay time measuring unit 75 may be configured to vary the control code in response to the detection signal det and output a delay time difference td. That is, the control unit 77 controls the code until the detection signal det indicating that the sampling clock signal clk is transmitted (or not transmitted) through the delay node A is input. And detects a control code corresponding to a threshold at which the sampling clock signal clk is transmitted through the delay node A, and thus a delay time difference corresponding to the control code corresponding to the threshold ( td).
  • the sampling clock signal generator 65 varies the pulse width of the sampling clock signal clk output in response to the control code.
  • the sampling clock signal clk has a pulse width corresponding to the control code.
  • the sampling clock signal clk is input to the delay time measuring unit 75 through the touch panel 10 (13 or 16) and the delay node A. Whether the sampling clock signal clk is input to the delay time measuring unit 75 in the form of a clock signal depends on the pulse width of the sampling clock signal clk, the magnitude of the resistance of the touch panel 10 which varies according to the contact position. It is determined by the capacitance of the delay element 90 (e.g., capacitor C). However, among these, the capacitance of the delay element 90 is fixed, and the magnitude of the resistance of the touch panel 10 is also determined according to the contact position. As a result, the sampling clock signal clk is in the form of a clock signal. Whether it is input to 75 is determined by the pulse width of the sampling clock signal clk.
  • the sampling clock signal clk is transmitted to the delay time measuring unit 75 through the delay node A in the form of a clock signal. Distortion by the resistance and delay elements 90 of the panel 10 does not transfer it in the form of a clock signal. That is, the signal detector 76 of the delay time measurer 75 cannot detect the clock signal.
  • the threshold value is a value corresponding to the magnitude of the resistance of the touch panel 10 that varies according to the contact position, and also, this is a delay of the sampling clock signal clk and the signal clk_d of the delay node A. The value corresponds to the difference in time.
  • the signal detector 76 determines whether the sampling clock signal clk is transmitted through the delay node A in the form of a clock signal, and outputs a detection signal det according to the result.
  • the control unit 77 detects the threshold value while varying the control code in response to the detection signal det, so that the threshold value, that is, the pulse width of the sampling clock signal clk becomes the threshold value. Outputs a delay time difference td corresponding to a control code.
  • the controller 77 may be configured to detect the threshold value while varying the control code so that the pulse width of the sampling clock signal clk gradually decreases from the maximum value or a constant value, or the sampling clock signal clk. May be configured to detect the threshold value by varying a control code so that the pulse width of the pulse width increases gradually from the minimum value or a constant value, and detects the threshold value using a continuous approximation method. It may be configured.
  • the pulse widths of the sampling clock signal clk are varied so that the signals of the sampling clock signal clk and the delay node A (
  • the contact position can be calculated by detecting a difference in the delay time of clk_d) and calculating the magnitude of the resistance of the touch panel 10 which varies according to the contact position using the delay time difference.

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Abstract

La présente invention concerne un dispositif d'entrée comportant un écran tactile résistif et un procédé pour le calcul un point tactile de l'écran. Le dispositif d'entrée comporte : une pluralité d'électrodes; un écran tactile où la force de résistance entre chaque électrode et le point tactile varie selon le point tactile; une unité de génération de signal d'horloge d'échantillonnage qui émet en sortie un signal d'horloge d'échantillonnage; un premier commutateur qui assure l'application séquentielle du signal d'horloge d'échantillonnage à certaines des électrodes; un élément de temporisation qui retarde le signal d'un noeud de temporisation connecté à au moins une des électrodes; une unité de mesure de temps de retard qui mesure et émet en sortie la différence de temps de retard entre le signal du noeud de temporisation et le signal d'horloge d'échantillonnage; et une unité de calcul de coordonnées qui calcule les coordonnées du point tactile par la saisie de la différence de temps de retard.
PCT/KR2009/003586 2008-12-15 2009-07-01 Dispositif d'entrée comportant un écran tactile résistif et procédé pour le calcul du point tactile de l'écran Ceased WO2010071285A1 (fr)

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Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100940907B1 (ko) * 2008-09-04 2010-02-08 영남대학교 산학협력단 저항과 클록 주파수에 무관한 정전용량 센싱 터치키 및 그 동작 방법
KR100933037B1 (ko) * 2009-04-22 2009-12-21 에이디반도체(주) 커패시터 충전시간을 통하여 다중터치좌표를 인식하는 다중터치인식 저항막방식 터치스크린
KR101103825B1 (ko) * 2009-10-19 2012-01-06 주식회사 애트랩 멀티 터치를 감지할 수 있는 터치 패널 및 이 장치의 멀티 터치 감지 방법
KR101119208B1 (ko) * 2010-02-26 2012-03-22 쓰리에이로직스(주) 정전 용량형 터치 센서, 이의 동작 방법, 및 이를 포함하는 데이터 처리 시스템
KR101031500B1 (ko) * 2010-07-09 2011-04-29 주식회사 켐트로닉스 정전 용량 변화 감지 방법, 장치 및 그 방법을 실행하는 프로그램이 기록된 기록매체, 및 그 방법을 사용한 터치 감지 방법, 장치 및 그 방법을 실행하는 프로그램이 기록된 기록매체
US8988087B2 (en) 2011-01-24 2015-03-24 Microsoft Technology Licensing, Llc Touchscreen testing
US8725443B2 (en) 2011-01-24 2014-05-13 Microsoft Corporation Latency measurement
US8982061B2 (en) 2011-02-12 2015-03-17 Microsoft Technology Licensing, Llc Angular contact geometry
US9542092B2 (en) 2011-02-12 2017-01-10 Microsoft Technology Licensing, Llc Prediction-based touch contact tracking
US8773377B2 (en) 2011-03-04 2014-07-08 Microsoft Corporation Multi-pass touch contact tracking
US8913019B2 (en) 2011-07-14 2014-12-16 Microsoft Corporation Multi-finger detection and component resolution
US9378389B2 (en) 2011-09-09 2016-06-28 Microsoft Technology Licensing, Llc Shared item account selection
US9785281B2 (en) 2011-11-09 2017-10-10 Microsoft Technology Licensing, Llc. Acoustic touch sensitive testing
US8914254B2 (en) 2012-01-31 2014-12-16 Microsoft Corporation Latency measurement
JP5907337B2 (ja) * 2012-02-17 2016-04-26 Ｎｌｔテクノロジー株式会社 タッチパネル及びタッチパネル付表示装置
US9317147B2 (en) 2012-10-24 2016-04-19 Microsoft Technology Licensing, Llc. Input testing tool
JP6342141B2 (ja) 2013-11-15 2018-06-13 富士通コンポーネント株式会社 タッチパネル装置及びタッチパネル装置の制御方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000172446A (ja) * 1998-12-10 2000-06-23 Ricoh Co Ltd タッチパネルインタ―フェイス
US20050179671A1 (en) * 2004-02-17 2005-08-18 Degroot Jeffrey J. Generating and validating pixel coordinates of a touch screen display
KR20080021928A (ko) * 2006-09-05 2008-03-10 삼성전자주식회사 터치패널, 이를 갖는 터치스크린 표시장치 및 이의제조방법
KR20080064100A (ko) * 2008-06-02 2008-07-08 주식회사 애트랩 터치패널 장치 및 이의 접촉위치 검출방법

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100982282B1 (ko) * 2008-09-19 2010-09-15 주식회사 애트랩 센서, 센서의 센싱 방법, 및 센서의 필터
KR101033997B1 (ko) * 2008-11-11 2011-05-11 주식회사 애트랩 터치 패널 및 이를 구비하는 입력 장치

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000172446A (ja) * 1998-12-10 2000-06-23 Ricoh Co Ltd タッチパネルインタ―フェイス
US20050179671A1 (en) * 2004-02-17 2005-08-18 Degroot Jeffrey J. Generating and validating pixel coordinates of a touch screen display
KR20080021928A (ko) * 2006-09-05 2008-03-10 삼성전자주식회사 터치패널, 이를 갖는 터치스크린 표시장치 및 이의제조방법
KR20080064100A (ko) * 2008-06-02 2008-07-08 주식회사 애트랩 터치패널 장치 및 이의 접촉위치 검출방법

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