WO2013183922A1 - Procédé et appareil de détection de toucher ayant un bruit réduit - Google Patents

Procédé et appareil de détection de toucher ayant un bruit réduit Download PDF

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Publication number
WO2013183922A1
WO2013183922A1 PCT/KR2013/004935 KR2013004935W WO2013183922A1 WO 2013183922 A1 WO2013183922 A1 WO 2013183922A1 KR 2013004935 W KR2013004935 W KR 2013004935W WO 2013183922 A1 WO2013183922 A1 WO 2013183922A1
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Prior art keywords
sensor
sensor pad
order
capacitance
sensor pads
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PCT/KR2013/004935
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English (en)
Korean (ko)
Inventor
김동운
이익재
조인호
신현철
Original Assignee
크루셜텍 주식회사
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Priority claimed from KR1020120120539A external-priority patent/KR101453347B1/ko
Application filed by 크루셜텍 주식회사 filed Critical 크루셜텍 주식회사
Publication of WO2013183922A1 publication Critical patent/WO2013183922A1/fr

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR 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
    • G06F3/0416—Control or interface arrangements specially adapted for digitisers
    • G06F3/0418—Control or interface arrangements specially adapted for digitisers for error correction or compensation, e.g. based on parallax, calibration or alignment
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR 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
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR 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
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G06F3/0443—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a single layer of sensing electrodes
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR 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
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G06F3/0446—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes

Definitions

  • the present invention relates to a method and apparatus for detecting a touch, and more particularly, to a touch detection method and apparatus for performing touch detection on a touch screen panel in any order.
  • the touch screen panel is a device for inputting a user's command by touching a character or a figure displayed on a screen of the image display device with a human finger or other contact means, and is attached to the image display device.
  • the touch screen panel converts a contact position touched by a human finger or the like into an electrical signal.
  • the electrical signal is used as an input signal.
  • the capacitive touch panel converts a contact position into an electrical signal by detecting a change in capacitance that a conductive sensing pattern forms with other surrounding sensing patterns or ground electrodes when a human hand or an object comes into contact with the touch panel.
  • FIG. 1 is an exploded plan view of an example of a capacitive touch screen panel according to the related art.
  • the touch screen panel 1 may include a first sensor pattern layer 3, a first insulating layer layer 4, and a second sensor pattern layer sequentially formed on the transparent substrate 2 and the transparent substrate 2. 5) and the second insulating film layer 6 and the metal wiring 7.
  • the first sensor pattern layer 3 may be connected in the transverse direction on the transparent substrate 2, for example, may be formed in a regular pattern in which a plurality of diamond shapes are connected in a line.
  • the first sensor pattern layer 3 may be formed of a plurality of Y patterns formed such that the first sensor pattern layers 3 positioned in one row having the same Y coordinate are connected to each other. ).
  • the second sensor pattern layer 5 may be connected along the column direction on the first insulating layer 4, and may be formed in the same diamond shape as the first sensor pattern layer 3, for example.
  • the second sensor pattern layer 5 is connected to each other, and the second sensor pattern layer 5 located in one column having the same X coordinate is connected to each other, and the first sensor pattern layer 3 is not overlapped with the first sensor pattern layer 3. ) And alternately.
  • the second sensor pattern layer 5 is connected to the metal wires 7 in units of columns.
  • the first and second sensor pattern layers 3 and 5 may be made of a transparent conductive material such as indium tin oxide (ITO), and the first insulating layer 4 may be made of a transparent insulating material.
  • ITO indium tin oxide
  • One sensor pattern layer 3, 5 is electrically connected to the driving circuit through the metal wire 7, respectively.
  • the resistive touch panel is a method of detecting the position of the pressed part by a hand or a pen against the two substrates on which the transparent conductive film is formed by the electrical contact of the transparent conductive film. It is a method that measures the change of resistance and current when touched by using capacitance.
  • a resistive film method having a simple manufacturing process and a low manufacturing cost is used more than a capacitive method.
  • the resistive film method not only has a fundamental problem in multi-touch recognition, but also has a problem in that transmittance is low and durability is inferior to the use period.
  • the capacitive (or 'capacitive') touch input device developed as an alternative to the resistive touch input device detects touch input in a non-contact manner, and solves all problems of the resistive touch input device. Can be presented.
  • FIG. 2 is an exploded plan view of a touch detection apparatus including a touch panel according to the prior art.
  • the touch detection device includes a touch panel, a driving device, and a circuit board 20 connecting the two.
  • the touch panel includes a plurality of sensor pads 30 formed on the substrate 15 and a plurality of signal wires 40 connected to the sensor pads 30.
  • the substrate 15 may be made of glass or plastic film made of a transparent material.
  • the plurality of sensor pads 30 may be rectangular or rhombic, but may be different from each other, or may have a uniform polygonal shape.
  • the sensor pads 30 may be arranged in a matrix form of adjacent polygons.
  • Each signal wire 40 has one end connected to the sensor pad 30 and the other end extending to the bottom edge of the substrate 15.
  • the line width of the signal wire 40 may be formed very narrowly, on the order of several micrometers to several tens of micrometers.
  • the sensor pad 30 and the signal wiring 40 are simultaneously formed by, for example, laminating an ITO film on the substrate 15 by sputtering or the like and then patterning the same using an etching method such as photolithography. can do.
  • the substrate 15 may be a transparent film.
  • the sensor pad 30 and the signal wire 40 may be directly patterned on the cover glass 10.
  • the substrate 15 may be omitted.
  • the driving device for driving the touch panel may be formed on a circuit board 20 such as a printed circuit board or a flexible circuit film, but is not limited thereto and may be directly mounted on a part of the substrate 15 or the cover glass 10.
  • the driving device may include a touch detector, a touch information processor, a memory, a controller, and the like, and may be implemented by one or more integrated circuit (IC) chips, and the touch detector, the touch information processor, the memory, and the controller may be separated from each other, or two.
  • IC integrated circuit
  • the touch detector may include a plurality of switches and a plurality of capacitors connected to the sensor pad 30 and the signal wire 40, drive circuits for touch detection by receiving a signal from the controller, and a voltage corresponding to the touch detection result.
  • the touch detector may include an amplifier and an analog-digital converter, and may convert, amplify, or digitize the difference in the voltage change of the sensor pad 30 into a memory.
  • the touch information processing unit processes the digital voltage stored in the memory to generate necessary information such as whether the touch is present, the touch area and the touch coordinates.
  • the controller may control the touch detector and the touch information processor, and may include a micro control unit (MCU), and may perform predetermined signal processing through firmware.
  • MCU micro control unit
  • the memory stores digital voltages and predetermined data used for touch detection, area calculation, and touch coordinate calculation or data received in real time based on the difference in voltage change detected from the touch detection unit.
  • Noise is generated when the touch screen panel detects touch due to noise caused by an external environment, for example, power supply noise, or a flexible printed circuit (FPC), indium tin oxide (ITO) pattern, or touch controller. This is because it affects adjacent sensor pads. In addition, such noise interferes with the recognition of the actual touch screen panel, and reduces the noise contrast signal SNR that influences the performance of the touch controller.
  • an external environment for example, power supply noise, or a flexible printed circuit (FPC), indium tin oxide (ITO) pattern, or touch controller.
  • the capacitive touch panel has a problem in that noise is generated by sensor pads adjacent to the same column or the same row of the sensor pads included in the sensing touch panel for measuring capacitance. This phenomenon occurs frequently while performing sequential scans between adjacent cells regardless of the actual touch.
  • An object of the present invention is to provide a touch detection method and apparatus that can reduce the noise due to the sequential detection by specifying the sensing order of each sensor pad of the touch screen panel in an arbitrary order.
  • a touch detection method comprising: a touch detection method in a touch screen panel including a plurality of sensor pads arranged in isolation from each other in a matrix form of a plurality of columns and rows; a) measuring a capacitance value for the first sensor pad; b) measuring a capacitance value for a second sensor pad selected from sensor pads not arranged in the same column or row as the first sensor pad; And c) applying steps a) and b) to each of the sensor pads to perform touch detection based on the measured capacitance values.
  • the capacitive measurement order of all the sensor pads is specified in such a manner that the capacitance values are not continuously measured for the sensor pads arranged in the same column or the same row. It may further comprise the step.
  • the specifying of the capacitance measurement order may specify the capacitance measurement order such that the second sensor pad is selected from among the sensor pads that are not adjacent to the first sensor pad.
  • all of the sensor pads are assigned an identifier, and the identifiers are sequentially arranged in the order arranged from the first row to the last row based on the sensor pads arranged in the same column among all the sensor pads. Or a unique number for each channel assigned in reverse order.
  • a touch detection apparatus comprising: an order designation unit for designating a capacitance measurement order of a plurality of sensor pads arranged in isolation from each other in a matrix form of a plurality of columns and rows; A capacitance measuring unit measuring capacitance values of the plurality of sensor pads in the capacitance measurement order; And a touch detector configured to perform touch detection based on the measured capacitance value, wherein the capacitance measurement order is such that the capacitance value is not continuously measured for the sensor pads arranged in the same column or the same row. Order.
  • the touch detection unit may include: a capacitance storage unit for storing capacitance values for each sensor pad according to the capacitance measurement order; And a final result output unit which maps the stored capacitance value to an arrangement position of the sensor pad and outputs a final result value.
  • the order designation unit is the same as the first sensor pad.
  • the capacitive measurement order may be specified such that a second sensor pad that is not a column or the same row is selected, and the capacitive measurement order may be specified such that the second sensor pad is selected from a sensor pad that is not adjacent to the first sensor pad. have.
  • an identifier is assigned to each of the plurality of sensor pads, and the identifiers are arranged in the order of the first row to the last row based on the sensor pads arranged in the same column among the plurality of sensor pads. It may be a unique number for each channel assigned sequentially or in reverse order.
  • the order designation unit divides the plurality of sensor pads into n groups to designate an identifier for each sensor pad for each of the divided groups, and the first sensor pad and the first sensor pad.
  • the two sensor pads may be two of the sensor pads having the same identifiers of the first to nth groups.
  • the touch detection method by performing the touch detection on the touch screen panel in any order, the noise component due to the sequential detection can be reduced.
  • FIG. 1 is an exploded plan view of an example of a capacitive touch screen panel according to the related art.
  • FIG. 2 is an exploded plan view of a touch detection apparatus including a touch panel according to the prior art.
  • FIG. 3 is a view for explaining the configuration of the touch detection apparatus according to an embodiment of the present invention.
  • FIG. 4 is a diagram illustrating an example of detecting a touch in a conventional touch screen panel.
  • FIG. 5 is a diagram illustrating an example of detecting a touch in a touch screen panel according to an embodiment of the present invention.
  • FIG. 6 is a diagram illustrating an example of detecting a touch in a touch screen panel according to another embodiment of the present invention.
  • FIG. 7 is a flowchart illustrating a touch detection method according to an embodiment of the present invention.
  • FIG. 8 is a flowchart illustrating a touch detection method according to another embodiment of the present invention.
  • any part of the specification is to “include” any component, this means that it may further include other components, except to exclude other components unless otherwise stated.
  • the terms “... unit”, “module”, etc. described in the specification mean a unit for processing at least one function or operation, which may be implemented in hardware or software or a combination of hardware and software. . And when a part is “connected” to another part, this includes not only the direct connection, but also the connection of another system in the middle.
  • FIG. 3 is a view for explaining the configuration of the touch detection apparatus according to an embodiment of the present invention.
  • the touch detection apparatus 100 includes an order designation unit 110, a capacitance measuring unit 120, and a touch detection unit 130.
  • the order designation unit 110 designates a capacitance measurement order for a plurality of channels.
  • Each channel may include a sensor pad and a connection wire connecting the sensor pad with a touch drive integrated circuit (IC) or an ordering unit 110 for specifying an order, wherein the sensor pads are arranged in a plurality of columns and rows. It can be arranged in isolation from each other in the form of a matrix.
  • IC touch drive integrated circuit
  • the order designation unit 110 specifies the capacitance measurement order of all the sensor pads in the order in which the capacitance values are not continuously measured for the sensor pads in the same column or the same row.
  • the order designation unit 110 may table the touch detection order of the channels by using channel identifiers assigned to the plurality of channels, and store the table touch detection order in a memory.
  • the channel identifier may be sequentially assigned to the row direction or the column direction of the sensor pad in order.
  • the channel identifier may include a unique number for each channel which is assigned sequentially or in reverse order according to the order arranged from the first row to the last row based on the sensor pads arranged in the same column among the plurality of sensor pads.
  • the channel identifiers for the nine sensor pads in the form of a 3 ⁇ 3 matrix may be given in the reverse order in the order arranged based on the sensor pads arranged in the same column from the left. That is, the channel identifier may be assigned to Ch1 as the first column 3 rows, Ch2 as the first column 2 rows, Ch3 as the first column 1 row, Ch4 as the second column 3 rows, and Ch9 as the third column 1 row. This can be assigned to Ch1 as the first column 3 rows, Ch2 as the first column 2 rows, Ch3 as the first column 1 row, Ch4 as the second column 3 rows, and Ch9 as the third column 1 row. This can be
  • connection wires one end is connected to each sensor pad, the other end may be connected to the touch drive integrated circuit (IC) for analyzing touch detection or the order designation unit 110 for specifying the order.
  • IC touch drive integrated circuit
  • the present invention is not limited thereto.
  • the order designation unit 110 may designate an arbitrary order such that the second sensor pads of the second channel that are not the same column or the same row as the first sensor pads of the first channel are selected, and in this case, the second sensor of the second channel
  • the capacitance measurement order may be specified so that the pad is selected from among the first sensor pad of the first channel and a sensor pad that is not neighboring.
  • the order designation unit 110 may divide a plurality of sensor pads into n groups and designate an identifier for each sensor pad for each divided group. That is, the first sensor pad and the second sensor pad may be two of the sensor pads having the same identifier of the first group to the nth group. In this regard, it will be described later with reference to FIG.
  • the capacitance measuring unit 120 measures the capacitance value according to the capacitance measurement order for the plurality of sensor pads. That is, the capacitance measuring unit 120 may measure capacitance values of the plurality of sensor pads in the order specified by the order designation unit 110.
  • the capacitance measuring unit 120 may measure the capacitance value of the first sensor pad of the first channel, and then select a sensor pad selected from the same column or the same row as the first sensor pad.
  • the capacitance value of the second sensor pad of the two channels may be measured.
  • the second channel to which the second sensor pad belongs may be selected by the order designation unit 110 from among channels that are not adjacent to the first channel to which the first sensor pad belongs. That is, the first channel and the second channel may be selected in turn in any order specified.
  • the touch detector 130 performs touch detection based on the measured capacitance value.
  • the touch detector 130 may further include a capacitive storage unit (not shown) and a final result output unit (not shown).
  • the capacitive storage unit may store capacitance values for each sensor pad according to the capacitance measurement order. At this time, the capacitance storage unit may store the capacitance values for each sensor pad in the form of a table. For example, the capacitance storage unit may store capacitance values according to the capacitance measurement order specified by the order designation unit 110.
  • the final result output unit maps the stored capacitance value to the arrangement position of the sensor pad and outputs the final result value. That is, the final result output unit may output the final result value by converting the stored capacitance value into a sequential order before designating the capacitance measurement order. In this case, the final result output unit may output the final result values in a table.
  • the final result output unit may output the final result value by converting the sequential order for each channel before designating the capacitance values stored in the capacitance measurement order specified by the plurality of channel identifiers. This will be described later with reference to FIG. 5.
  • FIG. 4 is an example of a touch detection method in a conventional touch screen panel. When touch occurs on a sensor pad of a specific channel, FIG. 4 illustrates a capacitance measurement result.
  • the touch screen panel includes a plurality of channels formed on a substrate, and each channel includes a sensor pad and a connection wire connected to the sensor pad.
  • the substrate may be made of glass or plastic film of transparent material or the like.
  • the plurality of sensor pads may be rectangular or rhombic, but may be different from each other, or may have a uniform polygonal shape.
  • the sensor pads may be arranged in the form of a matrix of adjacent polygons.
  • connection line has one end connected to the sensor pad and the other end connected to a touch drive integrated circuit (IC) that analyzes touch detection.
  • IC touch drive integrated circuit
  • the line width of the connection wiring can be formed very narrowly, on the order of several micrometers to several tens of micrometers.
  • the sensor pad and connection wiring may be made of transparent conductive materials such as indium-tin-oxide (ITO), antimony tin oxide (ATO), indium-zinc-oxide (IZO), carbon nanotube (CNT), and graphene (graphene).
  • ITO indium-tin-oxide
  • ATO antimony tin oxide
  • IZO indium-zinc-oxide
  • CNT carbon nanotube
  • graphene graphene
  • capacitance values were sequentially measured for a plurality of sensor pads included in a touch screen panel. For example, capacitive measurement was performed for each sensor pad from Ch1 to Ch9 in a sequential order according to channel identifiers Ch1, Ch2, Ch3, etc., for the channel targeted for touch detection.
  • the capacitance is sequentially sequentially from the sensor pad having the channel identifier Ch1 to the Ch2, Ch3, Ch4, Ch5, Ch6, Ch7, Ch8, and Ch9 in the order specified in the sequence table. The measurement was carried out.
  • the graph shown on the right side of FIG. 4 shows a case in which touch generation occurs in the sensor pad of Ch3, and the capacitance measurement is sequentially performed on Ch1, Ch2, and Ch3 belonging to the same column.
  • the reference value 10 in the graph represents the capacitance level measured when no touch occurs on all the sensor pads belonging to the corresponding column.
  • the first section 30 is a section indicating the capacitance measurement value for Ch3
  • the second section 40 is the capacitance measurement value for Ch1 and Ch2. It is a section indicating.
  • the capacitance is largely measured for the first section 30 of the graph, that is, Ch3 in which touch is actually generated.
  • the capacitance measurement result for the second section 40 that is, the sensor pad belonging to the same row as the sensor pad where the touch is generated, is smaller than the first section 30, but the reference value 10 when no touch is made. Rather, it can be seen that the overall rise.
  • FIG. 4 illustrates the case where the sensor pad has a resolution of 3 ⁇ 3, in practice, since the sensor pad has a much higher resolution, a signal may be much more distorted or lost in the process of detecting a touch on many sensor pads.
  • the capacitive measurement order for the touch pad is arbitrarily designated when the touch is detected on the touch screen panel.
  • FIG. 5 is a diagram illustrating an example of detecting a touch in a touch screen panel according to an embodiment of the present invention.
  • FIG. 5 illustrates a case in which touch detection is performed by arbitrarily designating a sensing order of sensor pads of a touch screen panel.
  • the graph shown in FIG. 5 is a graph which shows the capacitance measurement result with respect to the sensor pad which belongs to the same column by this method.
  • the touch detection apparatus 100 designates each channel connected to the plurality of sensor pads in an arbitrary order, and measures capacitance of the sensor pads according to the order. Can be performed.
  • the capacitance values may be measured in the order of the sensor pad having the channel identifier Ch3 to Ch5, Ch7, Ch2, Ch4, Ch9, Ch1, Ch6, and Ch8.
  • the final result value may be output by converting the sequential order according to the channel identifier again. That is, the capacitance values measured by specifying the order of Ch3 to Ch5, Ch7, Ch2, Ch4, Ch9, Ch1, Ch6, and Ch8 in an arbitrary order are determined as Ch1, Ch2, Ch3, Ch4, Ch5, Ch6, Ch7, Ch8,
  • the final result value (Output) can be output by rearranging by Ch9 order.
  • the capacitance measurement values for Ch1, Ch2 and Ch3 are shown.
  • the reference value 10 in the graph represents the capacitance level measured when no touch occurs in all the sensor pads belonging to the same column.
  • the first section 30 is a section representing the capacitance measurement value for Ch3
  • the second section 40 is the capacitance measurement value for Ch1 and Ch2. It is a section indicating.
  • the dotted line shows the capacitance measurement results for Ch1, Ch2, and Ch3 when the capacitance measurement method is performed sequentially from Ch1 to Ch9 according to the capacitance measurement method described with reference to FIG. will be.
  • a second sensor pad that is not adjacent to the first sensor pad, preferably a second sensor pad that does not belong to the same heat and is as far away from the first sensor pad as possible. Measure the capacitance for. Accordingly, capacitance measurement may be performed after a predetermined time with respect to the third sensor pad adjacent to the first sensor pad. When the capacitance is measured with respect to the third sensor pad, the influence caused by the touch on the first sensor pad is attenuated much. Therefore, when the capacitance is measured with the third sensor pad, the touch is generated on the first sensor pad. Can be minimized.
  • the capacitance measurement order is preferably, but not limited to, a method of measuring a sensor pad that is as far apart as possible without being in the same row after the measurement of the specific sensor pad.
  • the present invention is within the scope of the present invention as long as the touch detection is performed by measuring the capacitance of a sensor pad which is not adjacent thereto after measuring the capacitance of the specific sensor pad.
  • FIG. 6 is a diagram illustrating an example of detecting a touch in a touch screen panel according to another embodiment of the present invention.
  • the touch detection apparatus 100 divides a plurality of sensor pads into n groups, specifies an identifier for each sensor pad for each divided group, and assigns the same identifiers of the first to nth groups. Identifiers can be specified in any order, in turn.
  • the sensor pad is largely divided into four groups, and the capacitive measurement is performed alternately by one sensor pad in each group, the influence from the adjacent sensor pads can be minimized.
  • the area of the sensor pads arranged in a plurality of columns and rows is divided into four groups by dividing the area of the sensor pads into four groups, and the sensor pads located in the same column and the same row for each group.
  • the capacitance measurement for the sensor pads having the same identifiers may be sequentially performed.
  • each of the first sensor pads of the first to fourth groups may have the same identifier.
  • the first sensor pad of the first group up to the first sensor pad of the first group, the first sensor pad of the second group, the first sensor pad of the third group, and the first sensor pad of the fourth group
  • the order may be specified in turn, and the capacitance measurement may be performed according to the order.
  • the capacitance measurement of each sensor pad is performed in the order of the second sensor pad of the first group, the second sensor pad of the second group, the second sensor pad of the third group, and the second sensor pad of the fourth group. You can proceed.
  • the sensing sequence for touch detection is set as described above and the capacitance measurement of the touch pad is performed according to the sequence, the influence of the adjacent sensor pad, that is, the noise effect, is minimized in the capacitance measurement of the specific sensor pad. can do.
  • FIG. 7 is a flowchart illustrating a touch detection method according to an embodiment of the present invention.
  • the touch detection apparatus 100 may be configured for a first sensor pad of a first channel in a touch screen panel including sensor pads arranged in isolation from each other in a matrix form of a plurality of columns and rows. Measure the capacitance value. Before measuring the capacitance value of the first sensor pad of the first channel, the capacitance measurement order of the plurality of channels may be specified. In this case, the plurality of channels may be sequentially arranged, and each channel may include one sensor pad and a connection wire connecting the sensor pad to the touch drive integrated circuit (IC) or the ordering unit 110. .
  • IC touch drive integrated circuit
  • the touch detection apparatus 100 may designate the capacitance measurement order of all the sensor pads in order that the capacitance values are not continuously measured for the sensor pads arranged in the same column or the same row.
  • the touch detection apparatus 100 may designate a capacitance measurement order for each sensor pad using a channel identifier assigned to each of the plurality of channels.
  • the channel identifier is a unique number for each channel that is assigned sequentially or in reverse order based on the order arranged from the first row to the last row based on the sensor pads arranged in the same column among the plurality of sensor pads to which the connection wires are respectively connected.
  • the plurality of sensor pads are divided into n groups, and a channel identifier for each sensor pad is designated for each divided group, and the first to nth groups are assigned.
  • the same channel identifier of a group may be specified in order, respectively.
  • the touch detection apparatus 100 measures the capacitance value of the second sensor pad of the second channel selected from the same column or the same row as the first sensor pad of the first channel. That is, the touch detection apparatus 100 may designate a capacitance measurement order such that the second sensor pad of the second channel is selected from among the first sensor pad of the first channel and a sensor pad that is not neighboring. At this time, the first channel and the second channel may be selected in turn in any order specified.
  • the touch detection apparatus 100 performs touch detection based on the measured capacitance value.
  • the touch detection apparatus 100 stores the capacitance value for each sensor pad according to the capacitance measurement order, converts the stored capacitance value into a sequential order before designating the capacitance measurement order, and then generates a final result value. You can output
  • FIG. 8 is a flowchart illustrating a touch detection method according to another embodiment of the present invention.
  • the touch detection apparatus 100 arbitrarily specifies a capacitance measurement order to measure capacitance values of sensor pads arranged in isolation from each other in a matrix form of a plurality of columns and rows. .
  • the touch detection apparatus 100 may designate channel identifiers in any order.
  • the touch detection apparatus 100 divides a plurality of sensor pads into n groups, and assigns the same identifiers for the sensor pads located in the same column and the same row for each group for each divided group. Capacitance measurements may be sequentially performed on sensor pads having the same identifier of groups 1 to n-th.
  • the touch detection apparatus 100 measures a capacitance value of the first sensor pad of the first channel.
  • the first sensor pad of the first channel may be set in the order specified in step S210.
  • the touch detection apparatus 100 measures the capacitance value of the second sensor pad of the second channel selected from the same column or the same row as the first sensor pad of the first channel. That is, the touch detection apparatus 100 may designate a capacitance measurement order such that the second sensor pad of the second channel is selected from among the first sensor pad of the first channel and a sensor pad that is not neighboring. At this time, the first channel and the second channel may be selected in turn in any order specified.
  • the touch detection apparatus 100 stores capacitance values of respective sensor pads according to the capacitance measurement order.
  • the capacitance value for each sensor pad may be stored in a table form.
  • the touch detection apparatus 100 converts the stored capacitance value into a sequential order before designating the capacitance measurement order and outputs a final result value.
  • the touch detection apparatus 100 may perform touch detection based on the measured capacitance value.

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  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Position Input By Displaying (AREA)

Abstract

La présente invention concerne, selon un mode de réalisation, un procédé de détection de toucher d'un panneau à écran tactile qui comprend une pluralité de tampons de capteur séparés les uns des autres sous la forme d'une matrice constituée d'une pluralité de colonnes et de rangées, lequel procédé de détection de toucher comprend, selon une mise œuvre de l'invention : a) une étape consistant à mesurer la valeur de capacité d'un premier tampon de capteur ; b) une étape consistant à mesurer la valeur de capacité d'un deuxième tampon de capteur sélectionné parmi les tampons de capteur qui ne sont pas disposés dans la même colonne ou la même rangée que le premier tampon de capteur ; et c) une étape consistant à réaliser une détection de toucher sur la base de la valeur de capacité mesurée par application de l'étape (a) et de l'étape (b) pour chacun des tampons de capteur.
PCT/KR2013/004935 2012-06-04 2013-06-04 Procédé et appareil de détection de toucher ayant un bruit réduit WO2013183922A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
KR20120060010 2012-06-04
KR10-2012-0060010 2012-06-04
KR10-2012-0120539 2012-10-29
KR1020120120539A KR101453347B1 (ko) 2012-06-04 2012-10-29 노이즈 감소를 위한 터치 검출 방법 및 장치

Publications (1)

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WO2013183922A1 true WO2013183922A1 (fr) 2013-12-12

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PCT/KR2013/004935 WO2013183922A1 (fr) 2012-06-04 2013-06-04 Procédé et appareil de détection de toucher ayant un bruit réduit

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WO (1) WO2013183922A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080218494A1 (en) * 2003-02-10 2008-09-11 N-Trig Ltd. Touch detection for a digitizer
US20110037705A1 (en) * 2009-08-11 2011-02-17 Atmel Corporation Touch-sensitive user interface
KR20110042676A (ko) * 2009-10-19 2011-04-27 주식회사 애트랩 멀티 터치를 감지할 수 있는 터치 패널 및 이 장치의 멀티 터치 감지 방법
US20120062499A1 (en) * 2010-09-09 2012-03-15 3M Innovative Properties Company Touch sensitive device with stylus support
US20120086666A1 (en) * 2010-10-12 2012-04-12 Cypress Semiconductor Corporation Force Sensing Capacitive Hybrid Touch Sensor

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080218494A1 (en) * 2003-02-10 2008-09-11 N-Trig Ltd. Touch detection for a digitizer
US20110037705A1 (en) * 2009-08-11 2011-02-17 Atmel Corporation Touch-sensitive user interface
KR20110042676A (ko) * 2009-10-19 2011-04-27 주식회사 애트랩 멀티 터치를 감지할 수 있는 터치 패널 및 이 장치의 멀티 터치 감지 방법
US20120062499A1 (en) * 2010-09-09 2012-03-15 3M Innovative Properties Company Touch sensitive device with stylus support
US20120086666A1 (en) * 2010-10-12 2012-04-12 Cypress Semiconductor Corporation Force Sensing Capacitive Hybrid Touch Sensor

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