WO2015129614A1 - タッチパネル、タッチパネルの押圧位置検出方法 - Google Patents
タッチパネル、タッチパネルの押圧位置検出方法 Download PDFInfo
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- WO2015129614A1 WO2015129614A1 PCT/JP2015/054996 JP2015054996W WO2015129614A1 WO 2015129614 A1 WO2015129614 A1 WO 2015129614A1 JP 2015054996 W JP2015054996 W JP 2015054996W WO 2015129614 A1 WO2015129614 A1 WO 2015129614A1
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- electrode
- electrodes
- detection
- touch panel
- detection electrodes
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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
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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
- G06F3/045—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
-
- 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
- G06F3/0414—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using force sensing means to determine a position
-
- 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
- G06F3/04164—Connections between sensors and controllers, e.g. routing lines between electrodes and connection pads
-
- 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
- G06F3/04166—Details of scanning methods, e.g. sampling time, grouping of sub areas or time sharing with display driving
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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
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
- G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
- G06F2203/04104—Multi-touch detection in digitiser, i.e. details about the simultaneous detection of a plurality of touching locations, e.g. multiple fingers or pen and finger
Definitions
- the present invention relates to a touch panel and a pressed position detection method of the touch panel.
- a digital multi-resistive film type touch panel which is a kind of touch panel, has a plurality of line-shaped electrodes facing each other with an interval in the vertical direction extending in an intersecting direction.
- this touch panel when the opposing surfaces come into contact with each other by pressing down, the position is detected as an intersection of lines (see, for example, Patent Document 1).
- the width of each electrode is narrowed to increase the number of electrodes that come into contact with each other when pressed down.
- the number of electrodes increases, the number of routing wires extending therefrom increases, and as a result, the width of the frame region (frame region surrounding the central sensor region) becomes wide. That is, if the resolution is improved by increasing the number of electrodes, it is difficult to reduce the size of the touch panel.
- An object of the present invention is to reduce the size of the touch panel while increasing the number of electrodes to improve the resolution.
- a touch panel includes a base material, a plurality of detection electrodes, and a plurality of routing wires.
- the plurality of detection electrodes are detection electrodes formed on the first surface of the base material and arranged in the first direction, and include the same number of detection electrodes that are electrically connected to each other, and the same number as the planned simultaneous detection number The electrical combinations of the detection electrodes adjacent in the first direction are different from each other.
- the plurality of routing wires extend from the plurality of detection electrodes and are formed in a region outside the plurality of detection electrodes on the first surface of the substrate.
- this touch panel includes a set of detection electrodes that are electrically connected to each other, the number of routing wires can be reduced, and as a result, the area outside the plurality of detection electrodes can be reduced, that is, the touch panel can be made smaller.
- the electrical combinations of the detection electrodes adjacent to the first direction in the same number as the planned simultaneous detection number are different from each other, for example, when the planned simultaneous detection number of electrodes is detected, the combination is uniquely It is determined. Note that “the electrical combination of the detection electrodes adjacent in the first direction in the same number as the planned simultaneous detection number is different from each other” means that the detection electrodes that are electrically connected to each other are considered as one electrode.
- the touch panel method may be either a digital multi-resistance film method or a capacitance method.
- the number of detection electrodes electrically connected to each other is two, and the electrical combination of two detection electrodes adjacent in the first direction may be different from each other. In this case, the number of routing wires is, for example, nearly 1 ⁇ 2.
- the electrical combinations of the detection electrodes adjacent in the first direction are different from each other, for example, when two electrodes are detected, the combination is uniquely determined. Note that “the electrical combination of two detection electrodes adjacent in the first direction is different from each other” means that a pair of detection electrodes electrically connected to each other is considered as one electrode. It means that the same thing does not exist in the combination of two detection electrodes adjacent to one direction.
- the plurality of detection electrodes may include a first pair composed of a first electrode and a second electrode connected to each other, and a second pair composed of a third electrode and a fourth electrode connected to each other.
- the third electrode is disposed on the side close to the second electrode between the first electrode and the second electrode in the first direction, and there is another between the first electrode and the third electrode in the first direction.
- a gap in which the second pair of fourth electrodes is disposed may be secured.
- the second electrode is disposed on the side close to the third electrode between the third electrode and the fourth electrode in the first direction, and there are other electrodes between the second electrode and the fourth electrode in the first direction.
- a gap in which the first pair of first electrodes is disposed may be secured.
- a first pair of first electrodes for example, in the first direction, a first pair of first electrodes, another second pair of fourth electrodes, a second pair of third electrodes, a first pair of second electrodes, and another first pair.
- the detection electrodes are arranged in the order of the first electrode and the second pair of fourth electrodes.
- the number of detection electrodes electrically connected to each other is three, and the electrical combination of the three detection electrodes adjacent in the first direction may be different from each other.
- the number of routing wires is, for example, close to 1/3. Note that “the electrical combinations of the three detection electrodes adjacent in the first direction are different from each other” means that when a set of detection electrodes electrically connected to each other is considered as one electrode, This means that the same combination does not exist in the combination of three detection electrodes adjacent in the first direction.
- the plurality of detection electrodes are connected to each other in the first direction and arranged in order in the first direction, the first set of the first detection electrode, the second detection electrode, and the third detection electrode, and the first detection electrode connected to each other in order in the first direction.
- You may have the 2nd group which consists of 4 detection electrodes, 5th detection electrode, and 6th detection electrode.
- a fourth detection electrode may be disposed between the second detection electrode and the third detection electrode in the first direction.
- a third detection electrode may be disposed between the fourth detection electrode and the fifth detection electrode in the first direction.
- positioned may be ensured.
- positioned may be ensured.
- the detection electrodes are arranged in the order of one set of third detection electrodes, a second set of fifth detection electrodes, another first set of first detection electrodes, and a second set of sixth detection electrodes.
- the plurality of detection electrodes may include a plurality of sets including a first side electrode, an intermediate electrode, and a second side electrode that are connected to each other and arranged in order in the first direction.
- the first ends of the first side electrode and the intermediate electrode may be connected to each other in the second direction, which is a direction intersecting the first direction.
- the second end on the opposite side of the first end in the second direction may be connected to the intermediate electrode and the second side electrode.
- a gap in which another set of second side electrodes is disposed may be secured.
- a gap in which another set of the first side electrodes is disposed may be secured.
- a first set of first side electrodes for example, in the first direction, a first set of first side electrodes, another set of second side electrodes, a first set of intermediate electrodes, a second set of first side electrodes, a first set
- Each detection electrode is arranged in the order of the second side electrode of the set, the second set of intermediate electrodes, the other set of first side electrodes, and the second set of second side electrodes.
- the touch panel may further include a plurality of second detection electrodes and a plurality of second routing wires.
- the plurality of second detection electrodes are second detection electrodes arranged in a second direction intersecting the first direction and arranged to overlap the plurality of detection electrodes, and a set of second detection electrodes electrically connected to each other.
- the electrical combinations of the second detection electrodes adjacent to each other in the second direction in the same number as the planned simultaneous detection number are different from each other.
- the plurality of second routing wires extend from the plurality of second detection electrodes and are formed in regions outside the plurality of second detection electrodes.
- the touch panel has a first resistor provided between the detection electrodes electrically connected to each other, a reference resistor connected in series to the first resistance, and a plurality of detection electrodes facing each other with a plurality of gaps therebetween.
- a plurality of second detection electrodes that can contact the detection electrodes; a power source that applies a voltage to at least one of the plurality of second detection electrodes; and a voltage detector that measures a voltage drop across the reference resistor. May be.
- the voltage detector measures the voltage drop of the reference resistance in a state where the power source applies a voltage to at least one of the plurality of second detection electrodes, any one of the detection electrodes connected to each other is measured according to the value. It is possible to determine whether the position has been pressed. This is because the presence or absence of a voltage drop at the first resistor differs depending on whether one of the detection electrodes detected from the other is pressed or the other is pressed. This is because the voltage drop in either is different.
- the plurality of second detection electrodes are preferably made of a material having a higher resistance value than the plurality of detection electrodes.
- a touch panel pressing position detection method is the touch panel pressing position detection method described above, and includes the following steps.
- this touch panel it is possible to determine which position of the detection electrodes connected to each other is pressed by the value of the voltage drop of the reference resistance.
- the presence or absence of a voltage drop at the first resistor differs depending on whether one position of the detection electrodes detected from each other is pressed or when the other position is pressed. This is because the voltage drop is different.
- the touch panel according to the present invention since it includes a set of detection electrodes electrically connected to each other, the number of routing wires can be reduced, and as a result, the area outside the plurality of detection electrodes can be reduced, that is, The touch panel can be downsized.
- FIG. 3 is a schematic plan view of the touch panel device according to the first embodiment, and shows a lower electrode group and a lead wiring connected to the lower electrode group. Sectional drawing of a touch panel. The flowchart of coordinate determination control.
- the partial top view of a touch panel The partial top view of a touch panel.
- the typical top view of the touch panel device concerning a 2nd embodiment.
- the partial top view of a touch panel The typical top view of the touch panel device concerning a 3rd embodiment.
- the block diagram which shows the control structure of the touchscreen controller and switch circuit in 5th Embodiment.
- the fragmentary top view of the touchscreen which concerns on 6th Embodiment.
- the electric circuit diagram for demonstrating the voltage detection by a voltage detector The partial top view of a touch panel.
- the electric circuit diagram for demonstrating the voltage detection by a voltage detector The fragmentary top view of the touchscreen which concerns on 7th Embodiment.
- the electric circuit diagram for demonstrating the voltage detection by a voltage detector The electric circuit diagram for demonstrating the voltage detection by a voltage detector.
- the electric circuit diagram for demonstrating the voltage detection by a voltage detector The electric circuit diagram for demonstrating the voltage detection by a voltage detector.
- the electric circuit diagram for demonstrating the voltage detection by a voltage detector The electric circuit diagram for demonstrating the voltage detection by a voltage detector.
- 1 and 2 are schematic plan views of the touch panel device according to the first embodiment.
- FIG. 1 is a diagram showing the upper electrode group and the routing wiring connected thereto
- FIG. 2 is a diagram showing the lower electrode group and the routing wiring connected thereto.
- FIG. 3 is a cross-sectional view of the touch panel.
- the touch panel device 1 is employed in, for example, smartphones, tablet PCs, notebook PCs, and accessories thereof.
- the touch panel device 1 includes a matrix type (digital type) resistive touch panel 2.
- the resistive touch panel 2 is mainly composed of an upper electrode member 3 and a lower electrode member 5.
- the upper electrode member 3 includes, for example, a rectangular transparent insulating film 11 and an upper electrode group 13 formed on the lower surface thereof.
- the lower electrode member 5 includes, for example, a rectangular transparent insulating film 15 and a lower electrode group 17 formed on the upper surface thereof.
- the upper electrode member 3 and the lower electrode member 5 are bonded to each other via a spacer 14 at the periphery.
- the upper electrode group 13 and the lower electrode group 17 are made of a metal oxide such as tin oxide, indium oxide, antimony oxide, zinc oxide, cadmium oxide, or ITO, or gold, silver, copper, tin, nickel, aluminum, or It may be formed of a metal such as palladium or a thin film of a conductive polymer.
- the upper electrode group 13 and the lower electrode group 17 may be formed of conductive paste such as carbon or silver, or opaque conductive ink.
- the conductive ink is an ink in which a conductive substance is mixed in a binder.
- the conductive substance include carbon nanotubes, metal particles, metal nanofibers, and PEDOT (polyethylenedioxythiophene) which is a conductive resin polymer.
- the spacer 14 in addition to a resin film similar to the transparent insulating substrate, a printed layer or a coating layer of a resin such as an acrylic resin, an epoxy resin, or a silicone resin can be used.
- the spacer 14 often serves as an adhesive layer made of a double-faced tape in the form of a frame for fixing the upper electrode member 3 and the lower electrode member 5, an adhesive, or an adhesive.
- the upper electrode group 13 and the lower electrode group 17 are arranged so as to overlap each other in plan view, and face each other with a gap in the vertical direction. Therefore, when the region of the upper electrode group 13 is pushed down toward the lower electrode group 17, the upper electrode and the lower electrode positioned in the pushed region are electrically connected.
- the depression may be performed with a finger, a stylus pen, a stick, or the like, for example.
- a decorative film 7 is bonded via a PSA 8.
- the decorative film 7 is, for example, a film with a hard coat.
- the PSA 8 is realized using, for example, a double-sided tape.
- a substrate 9 is bonded under the transparent insulating film 15 via a PSA 10.
- substrate 9 is comprised from PC polycarbonate and glass, for example. In the above laminated structure, the number, type, and order of specific layers are not particularly limited.
- the touch panel device 1 further includes a touch panel controller 21.
- the touch panel controller 21 can be realized by a program incorporated in a computer, a CPU, a RAM, a ROM, an IC, and the like.
- the touch panel controller 21 has a drive / voltage detection circuit (not shown).
- the drive / voltage detection circuit has a function of detecting a pressed position by applying a voltage to the detection electrode and detecting the change thereof.
- the upper electrode group 13 and the lower electrode group 17 are composed of a plurality of strip patterns formed on the transparent insulating film 11 and the transparent insulating film 15, respectively.
- the upper electrode group 13 includes upper electrodes X1 to X10, and each upper electrode extends long in the X direction, which is the left-right direction in FIG.
- the lower electrode group 17 includes lower electrodes Y1 to Y10, and each lower electrode extends long in the Y direction, which is the vertical direction in FIG.
- the number, shape, and position of the upper electrode group and the lower electrode group are not limited to this embodiment.
- the resistive touch panel 2 is divided into 100 matrix regions that are intersections of the ten upper electrodes X1 to X10 and the ten lower electrodes Y1 to Y10.
- the upper electrode group and the lower electrode group are not necessarily perpendicular to each other, and may intersect at any angle.
- the inner side (that is, the central portion) of the rectangle indicated by the dotted line 22 in FIG. 1 is the sensor region 23 in which the matrix is formed, and the outer side (that is, the edge portion surrounding the central portion) from the dotted line 22 is the frame region 24. It is.
- the upper electrodes X1 to X10 will be described in detail with reference to FIG.
- the electrode X1 and the electrode X4 are electrically connected to each other, and the electrode X5 and the electrode X8 are connected to each other.
- Said connection place is the X direction 1st side end (left side end of FIG. 1) of each electrode.
- bus-per electrodes 61 and 62 extending in the Y direction are formed.
- the electrode X3 and the electrode X6 are electrically connected to each other, and the electrode X7 and the electrode X10 are electrically connected to each other.
- Said connection place is the X direction 2nd side end (right side end of FIG. 1) of each electrode.
- bus-per electrodes 63 and 64 extending in the Y direction are formed.
- the electrode X2 and the electrode X9 are not connected to other electrodes, but in other embodiments having a large number of electrodes, each is connected to another electrode.
- the arrangement in which the detection electrodes that are not electrically connected to each other are adjacent to each other further includes a set of detection electrodes that are electrically connected to each other. Specifically, the two electrodes are A set electrically connected to each other is included.
- the plurality of detection electrodes include a first pair including a first electrode (X1) and a second electrode (X4) connected to each other, and a third pair including a third electrode (X3) and a fourth electrode (X6) connected to each other. There are two pairs.
- the third electrode (X3) is disposed on the side closer to the second electrode (X4) between the first electrode (X1) and the second electrode (X4) in the Y direction, and the first electrode ( A gap in which an electrode (X2) corresponding to the other second pair of fourth electrodes is disposed is secured between X1) and the third electrode (X3).
- the second electrode (X4) is disposed on the side close to the third electrode (X3) between the third electrode (X3) and the fourth electrode (X6) in the Y direction, and the second electrode (X3) in the Y direction ( A gap in which an electrode (X5) corresponding to the other first pair of first electrodes is disposed is secured between X4) and the fourth electrode (X6).
- a first pair of first electrodes (X1), an electrode (X2) corresponding to another second pair of fourth electrodes, and a second pair of third electrodes ( X3), the first pair of second electrodes (X4), the other first pair of first electrodes (X5), and the second pair of fourth electrodes (X6) are arranged in this order.
- the electrical combination of two detection electrodes adjacent to each other in the Y direction is different from each other means that the detection electrodes that are electrically connected to each other are considered as one electrode and are adjacent to each other in the Y direction. This means that the same combination does not exist between the two detection electrode combinations.
- the first electrode (X1) and the second electrode (X4) are electrically connected to each other, they are considered as one electrode, and the third electrode (X3) and the fourth electrode (X6) are Since it is electrically connected, it is considered as one electrode.
- the lower electrodes Y1 to Y10 will be described in detail with reference to FIG.
- the electrode Y1 and the electrode Y4 are electrically connected to each other, and the electrode Y5 and the electrode Y8 are connected to each other.
- Said connection location is the Y direction 1st side end (upper side end of FIG. 2) of each electrode.
- bus-per electrodes 65 and 66 extending in the X direction are formed.
- the electrode Y3 and the electrode Y6 are electrically connected to each other, and the electrode Y7 and the electrode Y10 are electrically connected to each other.
- Said connection location is the Y direction 2nd side end (lower side end of FIG. 2) of each electrode.
- bus bar electrodes 67 and 68 extending in the X direction are formed.
- the electrode Y2 and the electrode Y9 are not connected to other electrodes, but in other embodiments having a large number of electrodes, each is connected to another electrode.
- the arrangement in which the detection electrodes that are not electrically connected to each other are adjacent to each other further includes a set of detection electrodes that are electrically connected to each other. Specifically, the two electrodes are Each set is electrically connected to each other.
- the plurality of detection electrodes include a first pair including a first electrode (Y1) and a second electrode (Y4) connected to each other, and a third pair including a third electrode (Y3) and a fourth electrode (Y6) connected to each other. There are two pairs.
- the third electrode (Y3) is disposed on the side closer to the second electrode (Y4) between the first electrode (Y1) and the second electrode (Y4) in the X direction.
- a gap in which an electrode (Y2) corresponding to the other second pair of fourth electrodes is disposed is secured between the three electrodes (Y3) in the X direction.
- the second electrode (Y4) is disposed on the side closer to the third electrode (Y3) between the third electrode (Y3) and the fourth electrode (Y6) in the X direction, and the second electrode (Y4) and the second electrode (Y4) A gap in which another first pair of first electrodes (Y5) is arranged is secured between the four electrodes (Y6).
- a first pair of first electrodes (Y1), an electrode (Y2) corresponding to another second pair of fourth electrodes, a second pair of third electrodes ( Y3), the first pair of second electrodes (Y4), the other first pair of first electrodes (Y5), and the second pair of fourth electrodes (Y6) are arranged in this order.
- the electrical combinations of the two detection electrodes adjacent in the X direction are different from each other, for example, when two electrodes are detected, the combination is uniquely determined.
- the electrical combinations of two detection electrodes adjacent in the X direction are different from each other means that the detection electrodes that are electrically connected to each other are considered as one electrode and are adjacent in the X direction.
- the resistive touch panel 2 is usually connected to the touch panel controller 21 via the FPC 29 as shown in FIG.
- lead wires 30A to 30G are provided from the upper electrode group 13 and the lower electrode group 17 to the input / output end of the resistive touch panel 2.
- the routing wiring 30 is usually made of a metal such as gold, silver, copper, or nickel, or a conductive paste such as carbon, and printing methods such as screen printing, offset printing, gravure printing, or flexographic printing, or However, the present invention is not limited to this as long as electrical connection between the FPC 29 and the upper electrode group 13 and the lower electrode group 17 can be achieved.
- Each of the routing wires 30A to 30G has a terminal portion connected to the FPC 29.
- the means for connecting to the touch panel is not limited to the embodiment.
- the FPC may not be used.
- the touch panel controller may be provided on the FPC.
- the routing wirings 30A to 30F connected to the upper electrode group 13 will be described with reference to FIG.
- the lead wirings 30A to 30F are formed in the frame region 24 on the lower surface of the transparent insulating film 11.
- the routing wires 30A to 30C are arranged on the left side of FIG. 1, and the routing wires 30D to 30F are arranged on the right side of FIG.
- the routing wiring 30A is connected to the electrodes X1 and X4
- the routing wiring 30B is connected to the electrodes X5 and X8, and the routing wiring 30C is connected to the electrode X9.
- the lead wiring 30D is connected to the electrode X2, the lead wiring 30E is connected to the electrode X3 and the electrode X6, and the lead wiring 30F is connected to the electrode X7 and the electrode X10.
- the number of routing wirings is reduced from six, which is conventionally required, to six. Further, as the number of routing wirings increases, the number of wirings approaches 1 ⁇ 2.
- the routing wirings 31A to 31F connected to the lower electrode group 17 will be described with reference to FIG.
- the lead wirings 31A to 31F are formed in the frame region 24 on the upper surface of the transparent insulating film 15.
- the wirings 31A to 31C are arranged on the left side of FIG. 2, and the wirings 31D to 31F are arranged on the right side of FIG.
- the wiring 31A is connected to the electrodes Y1 and Y4, the wiring 31B is connected to the electrode Y2, and the wiring 31C is connected to the electrodes Y3 and Y6.
- the wiring 31D is connected to the electrodes Y5 and Y8, the wiring 31E is connected to the electrode Y9, and the wiring 31F is connected to the electrodes Y7 and Y10.
- the number of routing wirings is reduced from six, which is conventionally required, to six. It can also be seen that the number of wirings approaches 1 ⁇ 2 as the number of routing wirings increases.
- FIG. 4 is a flowchart of the coordinate determination control.
- 5 and 6 are partial plan views of the touch panel.
- an input member such as a stylus pen having a fixed tip shape.
- the touch panel controller 21 first determines a candidate upper electrode (step S1). Next, the touch panel controller 21 determines a candidate lower electrode (step S2). In any of the above cases, the determination method is based on the conventional matrix resistive film method, and thus the description thereof is omitted here.
- the touch panel controller 21 finally determines the coordinates of the push-down point based on the combination of the candidate upper electrode and the candidate lower electrode (step S3).
- the touch panel controller 21 can detect depression of a plurality of points.
- the touch panel controller 21 is in a state where only one electrode of the upper electrode group 13 or the lower electrode group 17 is pushed down or in a state where three electrodes adjacent in one direction are pushed down, The depressed position cannot be determined. Therefore, in such a case, the touch panel controller 21 does not determine the position of the depression point as a ghost.
- the touch panel controller 21 can determine the position in the Y direction. However, since the region B in FIG. 5 is in a state where only the electrode X4 is pressed down, the touch panel controller 21 determines that the position of the press-down point in the Y direction is that of the electrodes X1 and X4. Cannot determine which is.
- the touch panel controller 21 determines whether or not the detected depression points are valid when a plurality of depression points are detected in the depression detection control described above. Specifically, it is assumed that the A region and the C region are detected in FIG. The A region corresponds to the electrodes X1 and X2, and the C region corresponds to the electrodes X3 and X4. Therefore, the detection signals are output to the first routing wiring 30A, the fourth routing wiring 30D, and the fifth routing wiring 30E. As a result, the positions of the two push-down points in the Y direction cannot be determined. Therefore, in such a case, the touch panel controller 21 performs a process of ignoring that any one point is an invalid point.
- the A region and the D region when the A region and the D region are pushed down, the A region corresponds to the electrode X1 and the electrode X2, and the D region corresponds to the electrode X5 and the electrode X6.
- the detection signals are output to the routing wiring 30A, the routing wiring 30B, the routing wiring 30D, and the routing wiring 30E. As a result, the positions of the two push-down points in the Y direction can be determined.
- FIG. 7 is a schematic plan view of the touch panel device according to the second embodiment.
- FIG. 8 is a partial plan view of the touch panel. Note that description of portions common to the first embodiment is omitted as appropriate.
- an input member having a certain tip shape such as a stylus pen.
- the touch panel device 101 includes a matrix type (digital type) resistive touch panel 102.
- the resistive touch panel 102 is mainly composed of an upper electrode member and a lower electrode member.
- the upper electrode member has, for example, a rectangular transparent insulating film 111 and an upper electrode group 113 formed on the lower surface thereof.
- the lower electrode member has, for example, a rectangular transparent insulating film (not shown) and a lower electrode group (not shown) formed on the upper surface thereof.
- the upper electrode member and the lower electrode member are bonded to each other via a spacer (not shown) at the periphery.
- the touch panel device 101 further includes a touch panel controller 121.
- the configuration and functions of the touch panel controller 121 are the same as those in the above embodiment.
- the upper electrode group 113 and the lower electrode group 117 are composed of a plurality of strip patterns formed on the transparent insulating film 111 and a transparent insulating film (not shown), respectively.
- the upper electrode group 113 includes upper electrodes X1 to X17 arranged in the Y direction, and each upper electrode extends long in the X direction, which is the left-right direction in FIG.
- the lower electrode group 117 includes lower electrodes Y1 to Y8 arranged in the X direction, and each lower electrode extends long in the Y direction, which is the vertical direction in FIG.
- the resistive touch panel 2 is divided into 136 matrix regions that are intersections of the 17 upper electrodes X1 to X17 and the 8 lower electrodes Y1 to Y8.
- the upper electrode group and the lower electrode group are not necessarily perpendicular to each other, and may intersect at any angle.
- the inner side (that is, the central portion) of the rectangle indicated by the dotted line 122 in FIG. 7 is the sensor region 123 in which the above matrix is formed, and the outer side (that is, the edge portion surrounding the central portion) from the dotted line 122 is the frame region 124. It is.
- Electrode X1, electrode X3, and X5 are electrically connected to each other, electrode X7, electrode X9, and electrode X11 are connected to each other, and electrode X13, electrode X15, and electrode X17 are connected to each other. Said connection place is the X direction 1st side end (left side end of FIG. 7) of each electrode.
- bus-per electrodes 161, 162, 163 extending in the Y direction are formed.
- the electrode X4, the electrodes X6, and X8 are electrically connected to each other, and the electrode X10, the electrode X12, and the electrode X14 are connected to each other.
- connection location is the X direction 2nd side end (right side end of FIG. 7) of each electrode.
- bus-per electrodes 164 and 165 extending in the Y direction are formed.
- the electrode X2 and the electrode X16 are not connected to other electrodes, but in other embodiments having a large number of electrodes, they are connected to other electrodes, respectively.
- the arrangement in which the detection electrodes that are not electrically connected to each other are adjacent to each other further includes a plurality of sets of detection electrodes that are electrically connected to each other. Are electrically connected to each other.
- the plurality of detection electrodes are connected to each other and the first set of the first detection electrode (X1), the second detection electrode (X3), and the third detection electrode (X5) that are connected to each other and arranged in order in the first direction.
- a fourth detection electrode (X4) is arranged between the second detection electrode (X3) and the third detection electrode (X5) in the Y direction.
- the third detection electrode (X5) is disposed between the fourth detection electrode (X4) and the fifth detection electrode (X6) in the Y direction.
- a gap is provided between the first detection electrode (X1) and the second detection electrode (X3) in the Y direction in which the electrode (X2) corresponding to the other second set of sixth detection electrodes is disposed. Yes. Between the fifth detection electrode (X6) and the sixth detection electrode (X8) in the Y direction, a gap in which another first set of first detection electrodes (X7) is arranged is secured. In the resistive touch panel 102, for example, in the Y direction, the first set of first detection electrodes (X1), the electrode corresponding to the other second set of sixth detection electrodes (X2), and the first set of second electrodes.
- the electrodes are arranged in the order of the detection electrode (X7) and the second set of sixth detection electrodes (X8).
- Electrode Y1, electrode Y3, and electrode Y5 are electrically connected to each other.
- Said connection location is the Y direction 1st side end (upper end of FIG. 7) of each electrode.
- a bus-per electrode 166 extending in the X direction is formed.
- the electrode Y4, the electrode Y6, and the electrode Y8 are electrically connected to each other.
- Said connection location is the Y direction 2nd side end (lower side end of FIG. 7) of each electrode.
- bus bar electrodes 167 extending in the X direction are formed.
- the electrode Y2 and the electrode Y7 are not connected to other electrodes, but in another embodiment having a large number of electrodes, each is connected to another electrode.
- the arrangement in which the detection electrodes that are not electrically connected to each other are adjacent to each other further includes a plurality of sets of detection electrodes that are electrically connected to each other, specifically, three electrodes A set in which they are electrically connected to each other is included.
- the plurality of detection electrodes are connected to each other and the first set of the first detection electrode (Y1), the second detection electrode (Y3), and the third detection electrode (Y5) that are connected to each other and arranged in order in the first direction.
- a fourth detection electrode (Y4) is disposed between the second detection electrode (Y3) and the third detection electrode (Y5) in the X direction.
- a third detection electrode (Y5) is disposed between the fourth detection electrode (Y4) and the fifth detection electrode (Y6) in the X direction.
- a gap is provided between the first detection electrode (Y1) and the second detection electrode (Y3) in the X direction in which an electrode (Y2) corresponding to another second set of sixth detection electrodes is disposed. Yes.
- a gap is provided between the fifth detection electrode (Y6) and the sixth detection electrode (YX8) in the X direction in which an electrode (Y7) corresponding to the other first detection electrode of the first set is disposed. Yes.
- a first set of first detection electrodes (Y1), an electrode (Y2) corresponding to another second set of sixth detection electrodes, and a first set of second electrodes.
- the routing wirings 130A to 130G connected to the upper electrode group 113 will be described with reference to FIG.
- the lead wirings 130A to 130G are formed in the frame region 124 on the lower surface of the transparent insulating film 111.
- the wirings 130A to 130C are arranged on the left side of FIG. 7, and the wirings 130D to 130G are arranged on the right side of FIG.
- the wiring 130A is connected to the electrodes X1, X3, and X5
- the wiring 130B is connected to the electrodes X7, X9, and X11
- the wiring 130C is connected to the electrodes X13, X15, and X17.
- the wiring 130D is connected to the electrode X2, the wiring 130E is connected to the electrode X4, the electrode X6, and the electrode X8, the wiring 130F is connected to the electrode X10, the electrode X12, and the electrode X14, and the wiring 130G is connected to the electrode X16.
- the number of the routing wirings can be reduced from seven, which is conventionally required to seven, to seven. Further, as the number of routing wires increases, the number of wires approaches ⁇ ⁇ . A description of the routing wiring connected to the lower electrode group is omitted.
- the depression is performed in the E region.
- the E region corresponds to the electrode X3, the electrode X4, and the electrode X5.
- the routing wiring corresponding to the detected electrode becomes the routing wiring 130A and the routing wiring 130E, for example, the electrode X3 and the electrode X4 are pushed down, and at the same time, the electrode X4 and the electrode X5 are pushed down as other pressing points. Indistinguishable from the case.
- the touch panel controller 121 tentatively determines that the F region, which is near the center of the E region, is the detection position. Subsequently, if the pressed position moves to the G region in the upper right direction in FIG. 8, the corresponding detection electrodes become the electrode X2, the electrode X3, and the electrode X4, so that the touch panel controller 121 has moved the pressed position. I understand. Further, if the pushed position moves to the H region in the diagonally lower right direction in FIG. 8, the corresponding detection electrodes become the electrodes X4, X5, and X6 at that time, and the corresponding routing wiring does not change. Therefore, the touch panel controller 121 does not know that the depressed position has moved.
- the corresponding detection electrodes become electrodes X5, X6, and X7, and the corresponding routing wirings change, so the touch panel controller 121 shows that the push-down position has moved.
- FIG. 9 is a schematic plan view of the touch panel device according to the third embodiment.
- description is abbreviate
- the description of the lower electrode group and the lead wiring connected thereto is omitted.
- the touch panel device 201 includes a matrix type (digital type) resistive touch panel 202.
- the resistive film type touch panel 202 mainly includes an upper electrode member and a lower electrode member.
- the upper electrode member has, for example, a rectangular transparent insulating film 211 and an upper electrode group 213 formed on the lower surface thereof.
- the lower electrode member has, for example, a rectangular transparent insulating film (not shown) and a lower electrode group (not shown) formed on the upper surface thereof.
- the upper electrode member and the lower electrode member are bonded to each other via a spacer (not shown) at the periphery.
- the touch panel device 201 further includes a touch panel controller 221.
- the configuration and functions of the touch panel controller 221 are the same as those in the above embodiment.
- the upper electrode group 213 includes a plurality of strip patterns formed on the transparent insulating film 211.
- the upper electrode group 213 includes upper electrodes X1 to X14 arranged in the Y direction, and each upper electrode extends long in the X direction, which is the left-right direction in FIG.
- the resistive touch panel 202 is divided into a plurality of matrix regions that are intersections of the 14 upper electrodes X1 to X14 and the lower electrode (not shown).
- the inner side (that is, the central portion) of the rectangle indicated by the dotted line 222 in FIG. 9 is the sensor region 223 on which the above matrix is formed, and the outer side (that is, the edge portion surrounding the central portion) from the dotted line 222 is the frame region 224. It is.
- the upper electrodes X1 to X14 will be described in detail.
- the electrode X1, the electrode X3, and the electrode X5 are electrically connected to each other, the electrode X4, the electrode X6, and the electrode X8 are electrically connected to each other, the electrode X7, the electrode X9, and the electrode X11 are connected to each other, and the electrode X10 and the electrode X12 And the electrode X14 are connected to each other.
- the connection location of the electrode X1 and the electrode X3 is the first side end in the X direction (left side end in FIG. 9) of each electrode, and bus connection electrodes 261, 262, 263, 264 extending in the Y direction are formed as connection structures, respectively. ing.
- connection location of the electrodes X3 and X5 is the X-direction second side end (the right-side end in FIG. 9) of each electrode.
- bus-per electrodes 265, 266, 267, 268 extending in the Y direction are formed, respectively.
- the electrode X2 and the electrode X13 are not connected to other electrodes, but in other embodiments having a large number of electrodes, they are connected to other electrodes, respectively.
- the arrangement in which the detection electrodes that are not electrically connected to each other are adjacent to each other further includes a plurality of sets of detection electrodes that are electrically connected to each other. Are electrically connected to each other.
- the plurality of detection electrodes are connected to each other and arranged in order in the first direction (electrode X1, electrode X4, electrode X7, electrode X10) and intermediate electrode (electrode X3, electrode X6, electrode X9, electrode X12). And a second side electrode (electrode X5, electrode X8, electrode X11, electrode X14).
- the first end (for example, the electrode X4) and the intermediate electrode (for example, the electrode X6) are connected to each other at the first end in the X direction (the left end in FIG. 9).
- the intermediate electrode (for example, electrode X6) and the second side electrode (for example, electrode X8) are connected to each other at the second end (the right end in FIG. 9) opposite to the first end in the X direction.
- Another set of second side electrodes (for example, electrode X5) is arranged between the first side electrode (for example, electrode X4) and the intermediate electrode (electrode X6).
- Another set of first side electrodes (for example, electrode X7) is disposed between the intermediate electrode (for example, electrode X6) and the second side electrode (for example, electrode X8).
- a first set of first side electrodes for example, an electrode X4
- another set of second side electrodes for example, an electrode X5)
- Intermediate electrode eg, electrode X6
- second set of first side electrodes eg, electrode X7
- first set of second side electrodes electrode X8
- second set of intermediate electrodes eg, electrode X9
- the other set of first side electrodes for example, electrode X10
- the second set of second side electrodes for example, electrode X11
- the routing wirings 230A to 230F connected to the upper electrode group 213 will be described with reference to FIG.
- the routing wirings 230A to 230F are formed in the frame region 224 on the lower surface of the transparent insulating film 211.
- the wirings 230A to 230F are arranged on the right side of FIG. 9, and the wiring 230F is arranged on the left side of FIG.
- the wiring 230A is connected to the electrode X2, the wiring 230B is connected to the electrode X1, the electrode X3, and the electrode X5, the wiring 230C is connected to the electrode X4, the electrode X6, and the electrode X8, and the wiring 230D is connected to the electrode X7, the electrode X9, and the electrode
- the wiring 230E is connected to the electrode X10, the electrode X12, and the electrode X14, and the wiring 230F is connected to the electrode X13.
- the number of routing wirings in the conventional case is reduced from six to six. Further, as the number of routing wires increases, the number of wires approaches ⁇ ⁇ . Furthermore, in this embodiment, most of the routing wiring can be arranged in one side region of the frame region 224.
- a set in which a plurality of detection electrodes are connected to each other is further combined.
- the present invention is not limited to the above embodiment.
- an embodiment in which a set in which a plurality of detection electrodes are connected to each other and a single electrode are combined with each other will be described.
- a touch panel device 301 according to a fourth embodiment of the present invention will be described with reference to FIG.
- FIG. 10 is a schematic plan view of the touch panel device according to the fourth embodiment.
- the touch panel device 301 has a matrix type (digital type) resistive touch panel 302.
- the resistive film type touch panel 302 is mainly composed of an upper electrode member and a lower electrode member.
- the upper electrode member has, for example, a rectangular transparent insulating film 311 and an upper electrode group 313 formed on the lower surface thereof.
- the lower electrode member has, for example, a rectangular transparent insulating film (not shown) and a lower electrode group (not shown) formed on the upper surface thereof.
- the upper electrode member and the lower electrode member are bonded to each other via a spacer (not shown) at the periphery.
- the touch panel device 301 further includes a touch panel controller 321.
- the configuration and functions of the touch panel controller 321 are the same as those in the above embodiment.
- the upper electrode group 313 is composed of a plurality of strip patterns formed on the transparent insulating film 311.
- the upper electrode group 313 includes upper electrodes X1 to X14 arranged in the Y direction, and each upper electrode extends long in the X direction, which is the left-right direction in FIG.
- the resistive touch panel 2 is divided into a plurality of matrix regions that are intersections of the 14 upper electrodes X1 to X14 and the lower electrode (not shown).
- the inner side (that is, the central portion) of the rectangle indicated by the dotted line 322 in FIG. 10 is the sensor region 323 in which the matrix is formed, and the outer side (that is, the edge portion surrounding the central portion) from the dotted line 322 is the frame region 324. It is.
- the upper electrodes X1 to X14 will be described in detail.
- the electrode X1 and the electrode X5 are electrically connected to each other, and the electrode X7 and the electrode X11 are electrically connected to each other.
- the connection part of said electrodes is the X direction 1st side end (left side end of FIG. 10) of each electrode.
- bus-per electrodes 361 and 362 extending in the Y direction are formed.
- the electrode X4 and the electrode X8 are electrically connected to each other, and the electrode X10 and the electrode X14 are electrically connected to each other.
- the connection part of said electrodes is the X direction 2nd side end (right side end of FIG. 10) of each electrode.
- bus-per electrodes 363 and 364 extending in the Y direction are formed, respectively.
- an electrode X2 and the electrode X3 are arranged in order in the Y direction.
- the electrode X2 and the electrode X3 are not connected to other electrodes.
- an electrode X5, an electrode X6, and an electrode X7 are arranged in order in the Y direction.
- the electrode X6 is not connected to other electrodes.
- an electrode X8, an electrode X9, an electrode X10, and an electrode X11 are arranged in order in the Y direction.
- the electrode X9 is not connected to other electrodes.
- an electrode X11, an electrode X12, and an electrode X13 are arranged in order in the Y direction.
- the electrode X12 and the electrode X13 are not connected to other electrodes.
- a plurality of sets of detection electrodes that are electrically connected to each other are included. Specifically, a set of two electrodes that are electrically connected to each other (for example, a set of electrodes X1 and X5) , A set of electrode X4 and electrode X8, a set of electrode X7 and electrode X11, a set of electrode X10 and electrode X14) and a single electrode (for example, electrode X3, electrode X6, electrode X9, electrode X12) It consists of that. As described above, since the electrical combinations of the two detection electrodes adjacent in the Y direction are different from each other, for example, when two electrodes are detected, the combination is uniquely determined.
- the routing wires 330A to 330J connected to the upper electrode group 313 will be described with reference to FIG.
- the lead wirings 330A to 330F are formed in the frame region 324 on the lower surface of the transparent insulating film 311.
- the wirings 330A to 330E are arranged on the left side of FIG. 10, and the wirings 330F to 330J are arranged on the right side of FIG.
- the wiring 330A is connected to the electrodes X1 and X5, the wiring 330B is connected to the electrode X6, the wiring 330C is connected to the electrodes X7 and X11, the wiring 330D is connected to the electrode X12, and the wiring 330E is connected to the electrode X13. ing.
- the wiring 330F is connected to the electrode X2, the wiring 330G is connected to the electrode X3, the wiring 330H is connected to the electrode X4 and the electrode X8, the wiring 330I is connected to the electrode X9, and the wiring 330J is connected to the electrode X10 and the electrode X14. ing.
- the number of routing wires is reduced from 10 to 14 in the conventional case.
- the reduction rate of the number of wires increases.
- the same detection electrode since the same detection electrode (assuming that the electrodes electrically connected to each other are the same) appears only every four lines, the same combination does not occur when the number of detected detection electrodes is up to three. There is an advantage.
- the touch panel (for example, the resistive touch panel 2, 102, 202, 302) includes a base material, a plurality of detection electrodes, and a plurality of routing wires.
- a plurality of detection electrodes (for example, upper electrodes X1 to X10 of FIG. 1 of the first embodiment, upper electrodes X1 to X17 of FIG. 7 of the second embodiment, upper electrodes X1 to X14 of FIG. 9 of the third embodiment, In the fourth embodiment, the upper electrodes X1 to X14 in FIG.
- the base material for example, the transparent insulating films 11, 111, 211, and 311
- a plurality of pairs of detection electrodes for example, the electrode X1 and the electrode X4 in the first embodiment, the electrode X1 in the second embodiment, which are detection electrodes arranged side by side in the X direction) and electrically connected to each other.
- the second embodiment and the third embodiment Electrical combinations between the three) and the detection electrode adjacent to the first direction the same number are different from each other.
- a plurality of routing wirings are: It extends from the plurality of detection electrodes and is formed in a region (for example, frame regions 24, 124, 224, 324) outside the plurality of detection electrodes on the first surface.
- this touch panel includes a set of detection electrodes that are electrically connected to each other, the number of routing wires can be reduced, and as a result, the area outside the plurality of detection electrodes can be reduced, that is, the touch panel can be made smaller.
- the electrical combinations of the detection electrodes adjacent in the first direction with the same number as the planned simultaneous detection number are different from each other, for example, when the planned simultaneous detection number of electrodes is detected, the combination is uniquely determined. Is done. By preparing a plurality of the above-described configurations, arranging them in the stacking direction, and arranging them so that the extending directions of the electrodes intersect each other, it is possible to detect the pushed-down position on the plane.
- FIG. 11 is a block diagram illustrating a control configuration of the touch panel controller and the switch circuit.
- the touch panel controller 21 includes a control unit 403, a storage unit 405, and a detection circuit 407.
- the control unit 403 includes a CPU.
- the storage unit 405 includes a RAM and a ROM, and stores programs and data.
- the detection circuit 407 is a circuit for detecting the position where the decorative film 7 is pressed, and includes a DC power source 409 and a voltage detector 411.
- the DC power source 409 supplies power to the upper electrodes X1 to X10 and the lower electrodes Y1 to Y10.
- the voltage detector 411 is connected to the upper electrodes X1 to X10 and the lower electrodes Y1 to Y10 (described later).
- a switch circuit 401 is disposed between the touch panel controller 21 and the touch panel.
- the switch circuit 401 includes a plurality of switches 401a.
- the plurality of switches 401a can connect and disconnect the upper electrodes X1 to X10 and the lower electrodes Y1 to Y10 and the DC power supply 409.
- Each switch 401 a of the switch circuit 401 is controlled to be turned on and off by the control unit 403.
- the switch circuit 401 may be provided inside the touch panel controller 21.
- the control unit 403 controls the switch 401a of the switch circuit 401 to apply the DC voltage of the DC power supply 409 to the lower electrodes Y1 to Y10. Then, the control unit 403 controls the switch 401a of the switch circuit 401 to detect the generation of voltages corresponding to the upper electrodes X1 to X10 in order using the voltage detector 411.
- the generation of a voltage means that, for example, one of the ten cross matrices corresponding to the electrode X1 is pushed down and the cross matrix is in an electrically conductive state.
- the control unit 403 stores the upper electrode from which the voltage is detected as a candidate electrode in 405. This step corresponds to step S1 in FIG.
- the control unit 403 applies the DC voltage of the DC power source 409 to the upper electrodes X1 to X10 by controlling the switch 401a of the switch circuit 401. Then, the control unit 403 controls the switch 401a of the switch circuit 401 to detect the generation of voltages corresponding to the lower electrodes Y1 to Y10 in order using the voltage detector 411.
- the generation of a voltage means that, for example, one of the ten cross matrices corresponding to the electrode Y1 is pushed down and the cross matrix is in an electrically conductive state.
- the control unit 403 stores the lower electrode in which the voltage is detected in the storage unit 405 as a candidate electrode. This step corresponds to step S2 in FIG.
- control unit 403 reads information on each candidate electrode stored in the storage unit 405. Further, the control unit 403 determines a combination of candidate electrodes by determining whether or not a voltage is detected between the read candidate electrodes. The control unit 403 stores the candidate electrode combination information in the storage unit 405. This step corresponds to step S3 in FIG.
- FIG. 12 is a partial plan view of the touch panel.
- the upper electrode group 13A includes upper electrodes X1 to X10, and each upper electrode extends long in the X direction, which is the left-right direction in FIG.
- the lower electrode group 17A includes lower electrodes Y1 to Y10, and each lower electrode extends long in the Y direction, which is the vertical direction in FIG.
- the lower electrodes Y1 to Y10 are opposed to the upper electrodes X1 to X10 with a gap, and can contact the upper electrodes X1 to X10.
- FIG. 12 only the electrode Y5 is shown.
- the resistive touch panel 2 is divided into 100 matrix regions that are intersections of the ten upper electrodes X1 to X10 and the ten lower electrodes Y1 to Y10.
- the electrode X1 and the electrode X4 are electrically connected to each other, and the electrode X5 and the electrode X8 are connected to each other.
- Said connection place is the X direction 1st side end (left side end of FIG. 12) of each electrode.
- a resistor R S1 is provided as a connection structure.
- the electrode X3 and the electrode X6 are electrically connected to each other, and the electrode X7 and the electrode X10 are electrically connected to each other.
- Said connection location is the X direction 2nd side end (right side end of FIG. 12) of each electrode.
- a resistor R S1 is provided as a connection structure. The resistor R S1 only needs to realize a desired resistance value, and the material is not limited.
- the resistor R S1 may be a pattern made of a transparent conductive material such as ITO, CNT, or PEDOT. Further, the resistor R S1 may be a pattern made of a conductive paste such as carbon or silver. In the case of silver, the resistance value may be increased by reducing the line width. Further, the resistor R S1 may be realized by a member such as a chip resistor. The resistor R S1 may be realized by appropriately combining the above configurations. From the above, as an example of the combination of the materials of the respective members, it is conceivable to use silver for the electrode and the lead wiring, and carbon for the portion connecting the plurality of electrodes.
- Resistor R S1 is connected to the resistor R B as a reference resistor. Further, the input section of the voltage detector 411 is connected between the resistor R S1 and the resistor R B.
- the selection operation of the candidate electrode will be described. For simplicity of explanation, when a voltage is applied to the electrode Y5 and either the electrode X3 or the electrode X6 is pressed on the electrode Y5, the electrode X3 or Control for selecting the electrode X6 as a candidate electrode will be described.
- voltage detector 411 is capable of measuring the voltage drop across the resistor R B. That is, in the above configuration, the control unit 403 can determine which position of the electrode X3 or the electrode X6 is pressed based on the measurement value in the voltage detector 411.
- the resistance component from the DC power source 409 in the electrode Y5 to the point P 1 is the resistance R 1
- the resistance component from the point P 1 in the electrode Y5 to the point P 2 is a resistor R 2.
- the electrodes Y1 to Y10 may have a high resistance value by using, for example, carbon or ITO so that a predetermined resistance component can be obtained in the electrode Y5.
- the lower electrodes Y1 to Y10 are preferably made of a material having a sheet resistance exceeding 50 [ ⁇ ].
- the resistance values of the lower electrodes Y1 to Y10 may be the same as the resistance values of the upper electrodes X1 to X10, but are preferably higher.
- silver or silver and carbon may be used for the upper electrodes X1 to X10
- ITO or carbon may be used for the lower electrodes Y1 to Y10.
- FIG. 13 is an electric circuit diagram for explaining voltage detection by the voltage detector.
- the K region as shown in FIG. 12 has been pressed (electrode X3 is pressed) includes a resistor R 1 as shown in FIG. 13, a resistor R S1, a resistor R B are connected in series It becomes a state. Therefore, V B measured by the voltage detector 411 is as follows.
- V B (R B * V D ) / (R B + R S1 + R 1 )
- FIG. 14 is a partial plan view of the touch panel.
- FIG. 15 is an electric circuit diagram for explaining voltage detection by the voltage detector.
- the L region as shown in FIG. 14 has been pressed (electrode X6 is pressed) includes a resistor R 1 as shown in FIG. 15, the resistance R B is in a state connected in series. Therefore, VA measured by the voltage detector 411 is as follows.
- V A (R B * V D ) / (R B + R 1 + R 2 )
- the V AB measured by the voltage detector 411 is as follows: become.
- V A , V B , and V AB are different from each other. Therefore, when only the electrode X3 is pressed without pressing the electrode X6, when only the electrode X6 is pressed without pressing the electrode X3, the electrodes X3 and X6 It is possible to distinguish when both are pressed.
- the case where a total of three electrodes for example, the electrode X3, the electrode X4, and the electrode X5 are pressed is described, but the case where a total of one electrode is pressed is also described. If the electrodes X6 is pressed by electrode X3 not been pressed (if the point P 2 is pressed), when the case where only the electrodes X6 without electrode X3 is pressed is pressed (the point P 1 is pressed ).
- the electrode Y5 since the electrode Y5 has a predetermined resistance component, there is an advantage that the resistance value can be accurately detected even when, for example, the positions of four electrodes are pressed.
- the resistance values of the lower electrodes Y1 to Y10 are preferably higher than the resistance values of the upper electrodes X1 to X10, respectively.
- the resistance component of the electrode Y5 even when the resistance component of the electrode Y5 has little or very little, it is possible to determine whether the position corresponding to the electrode X3 or the electrode X6 is pressed.
- Seventh Embodiment A seventh embodiment will be described below as a modification of the combination of the second embodiment and the fifth embodiment. Since the basic structure and operation are the same, the differences from the second and fifth embodiments will be mainly described.
- a voltage detection configuration is disclosed in which the voltage detector can determine which of the three electrodes connected to each other is pressed.
- the upper electrode group and the lower electrode group will be described with reference to FIG.
- FIG. 16 is a partial plan view of the touch panel. In this embodiment, when the three electrodes adjacent in one direction are pushed down, the pushed-down position can be correctly determined.
- the upper electrode group 113A is composed of upper electrodes X1 to X17 arranged in the Y direction, and each upper electrode extends long in the X direction, which is the left-right direction in FIG.
- the lower electrode group 117B includes lower electrodes Y1 to Y8 arranged in the X direction, and each lower electrode extends long in the Y direction, which is the vertical direction in FIG. In FIG. 16, only the electrode Y5 is shown.
- the resistive touch panel is divided into 136 matrix regions that are intersections of the 17 upper electrodes X1 to X17 and the 8 lower electrodes Y1 to Y8.
- the upper electrodes X1 to X17 will be described in detail.
- Electrode X1, electrode X3, and X5 are electrically connected to each other, electrode X7, electrode X9, and electrode X11 are connected to each other, and electrode X13, electrode X15, and electrode X17 are connected to each other.
- the arrangement in which the detection electrodes that are not electrically connected to each other are adjacent to each other further includes a plurality of sets of detection electrodes that are electrically connected to each other. Are electrically connected to each other.
- connection location is the X direction 1st side end (left side end of FIG. 16) of each electrode.
- a resistor R S1 and a resistor R S2 are provided.
- the electrode X4, the electrodes X6, and X8 are electrically connected to each other, and the electrode X10, the electrode X12, and the electrode X14 are connected to each other.
- Said connection location is the X direction 2nd side end (right side end of FIG. 16) of each electrode.
- a resistor R S1 and a resistor R S2 are provided.
- the voltage detection configuration by the voltage detector 411 will be described by taking the resistor R S1 connecting the electrode X1 and the electrode X3 and the resistor R S2 connecting the electrode X3 and the electrode X5 as examples.
- Resistors R S1 and the resistor R S2 is connected to the resistor R B.
- the input section of the voltage detector 411 is connected between the resistor R S2 and a resistor R B.
- the selection operation of the candidate electrode will be described.
- the electrode X3 or the electrode X3 when the voltage is applied to the electrode Y5 and one of the electrode X3 and the electrode X6 is pressed on the electrode Y5. Control for selecting the electrode X6 as a candidate electrode will be described.
- the voltage detector 411 is capable of measuring the voltage drop V across resistor R B. That is, in the above configuration, when the DC power source 409 is applying a voltage to the electrode Y5, for example, the voltage detector 411 can measure the voltage from the electrode X1, the electrode X3, or the electrode X5.
- the resistance component from the DC power source 409 in the electrode Y5 to the point P1 is the resistance R 1
- the resistance component from the point P 1 in the electrode Y5 to the point P 2 is the resistance R 2
- from the point P 2 in the electrode Y5 resistance component to the point P 3 is a resistor R 3.
- FIG. 17 is an electric circuit diagram for explaining voltage detection by the voltage detector. If the electrode X1 is pressed, a resistor R 1 from the DC power source 409 in the electrode Y5, as shown in FIG. 17 to the point P 1, a resistor R S1, a resistor R S2, the resistor R B is in series Connected. Therefore, V 1 measured by the voltage detector 411 is as follows.
- V 1 (R B * V D ) / (R B + R S1 + R S2 + R 1 )
- FIG. 18 is an electric circuit diagram for explaining voltage detection by the voltage detector.
- the resistance R 1 from the DC power supply 409 to the point P 1 the resistance R 2 from the point P 1 to the point P 2 and the resistance R S2 in the electrode Y5.
- V 2 measured by the voltage detector 411 is as follows.
- V 2 (R B * V D ) / (R B + R S2 + R 1 + R 2 )
- FIG. 19 is an electric circuit diagram for explaining voltage detection by a voltage detector. If the electrode X5 is pressed, a resistor R 1 from the DC power source 409 in the electrode Y5, as shown in FIG. 19 to the point P 1, and the resistor R 2 from point P 1 to the point P 2, the point P 2 a resistor R 3 to the point P 3 from a state where the resistor R B are connected in series. Therefore, V 3 measured by the voltage detector 411 is as follows.
- V 3 (R B * V D ) / (R B + R 1 + R 2 + R 3 )
- the control unit 403 can distinguish. Note that, with this configuration, the control unit 403 can distinguish between the electrode X1 and the electrode X3, the electrode X3 and the electrode X5, and the electrode X1, the electrode X3, and the electrode X5. .
- the resistive film type touch panel has been described.
- the structures of the first to fourth embodiments can be applied to a capacitive type touch panel.
- the upper electrode group and the lower electrode group may be formed on separate insulating films, or may be formed on each surface of one insulating film.
- the upper electrode group and the lower electrode group employ the same type of electrode pattern, but the electrode patterns may be different vertically.
- the detection electrodes are connected to each other by the busper electrode.
- the connection method of the detection electrodes is not limited to the above embodiment.
- the detection electrodes may be connected to each other using part of the routing wiring.
- the present invention is applicable to many types of touch panel devices.
Abstract
Description
複数の検出電極は、基材の第1面に形成されて第1方向に並んで配置された検出電極であり、互いに電気的に接続された検出電極の組を含みつつ予定同時検出本数と同数で第1方向に隣接する検出電極の電気的組み合わせ同士は互いに異なっている。
複数の引き回し配線は、複数の検出電極から延び、基材の第1面において複数の検出電極より外側の領域に形成されている。
このタッチパネルでは、互いに電気的に接続された検出電極の組を含んでいるので、引き回し配線の数を減らすことができ、その結果、複数の検出電極より外側の領域を小さくでき、つまりタッチパネルを小型化できる。
また、予定同時検出本数と同数で前記第1方向に隣接する検出電極の電気的組み合わせ同士は互いに異なっているので、例えば予定同時検出本数の電極が検出された場合に、その組み合わせは一意的に決定される。なお、「予定同時検出本数と同数で第1方向に隣接する検出電極の電気的組み合わせ同士は互いに異なっている」とは、互いに電気的に接続された検出電極を1つの電極として考えた場合に、一方向に隣接する予定同時検出本数の検出電極の組み合わせ同士に同じものが存在しないことを意味する。
上記の構成を2組用意してそれらを積層方向に並べて、しかも電極の延びる方向を交差させるように配置することで、平面におけるタッチ位置を検出できる。
なお、タッチパネルの方式は、ディジタルマルチ抵抗膜方式、静電容量方式のいずれであってもよい。
また、第1方向に隣接する検出電極の電気的組合せ同士は互いに異なっているので、例えば2本の電極が検出された場合に、その組み合わせは一意的に決定される。なお、「第1方向に隣接する2本の検出電極の電気的組合せ同士は互いに異なっている」とは、互いに電気的に接続された一対の検出電極を1つの電極として考えた場合に、第1方向に隣接する2本の検出電極の組み合わせ同士に同じものが存在しないことを意味する。
第3電極は、第1方向における第1電極と第2電極との間の第2電極に近い側に配置されており、第1方向における第1電極と第3電極との間には他の第2対の第4電極が配置される隙間が確保されていてもよい。
第2電極は、第1方向における第3電極と第4電極との間の第3電極に近い側に配置されており、第1方向における第2電極と第4電極との間には他の第1対の第1電極が配置される隙間が確保されていてもよい。
このタッチパネルでは、例えば、第1方向において、第1対の第1電極、他の第2対の第4電極、第2対の第3電極、第1対の第2電極、他の第1対の第1電極、第2対の第4電極の順番で各検出電極が配置される。このように、第1方向に隣接する検出電極の電気的組合せ同士は互いに異なっているので、例えば2本の検出電極が検出された場合に、その組み合わせは一意的に決定される。
第1方向における第2検出電極と第3検出電極との間に、第4検出電極が配置されていてもよい。第1方向における第4検出電極と第5検出電極との間に、第3検出電極が配置されていてもよい。第1方向における第1検出電極と第2検出電極との間には、他の第2組の第6検出電極が配置される隙間が確保されていてもよい。第1方向における第5検出電極と第6検出電極との間には、他の第1組の第1検出電極が配置される隙間が確保されていてもよい。
このタッチパネルでは、例えば、第1方向において、第1組の第1検出電極、他の第2組の第6検出電極、第1組の第2検出電極、第2組の第4検出電極、第1組の第3検出電極、第2組の第5検出電極、他の第1組の第1検出電極、第2組の第6検出電極の順番で各検出電極が配置される。このように第1方向に隣接する3本の検出電極の電気的組合せ同士は互いに異なっているので、例えば3本の検出電極が検出された場合に、その組み合わせは一意的に決定される。
第1側電極と中間電極とは、第1方向と交差する方向である第2方向の第1端同士が接続されていてもよい。中間電極と第2側電極とは第2方向において第1端と反対側の第2端同士が接続されていてもよい。第1側電極と中間電極との間には、他の組の第2側電極が配置される隙間が確保されていてもよい。中間電極と第2側電極との間には、他の組の第1側電極が配置される隙間が確保されていてもよい。
このタッチパネルでは、例えば、第1方向において、第1の組の第1側電極、他の組の第2側電極、第1の組の中間電極、第2の組の第1側電極、第1の組の第2側電極、第2の組の中間電極、他の組の第1側電極、第2の組の第2側電極の順番で各検出電極が配置される。このように第1方向に隣接する3本の検出電極の電気的組合せ同士は互いに異なっているので、例えば3本の検出電極が検出された場合に、その組み合わせは一意的に決定される。
このタッチパネルでは、電源が複数の第2検出電極の少なくとも1つに電圧を印加した状態で電圧検出器が基準抵抗の電圧降下を測定すれば、その値によって、互いに接続された検出電極のいずれの位置が押されたのかが判別可能である。それは、互いに検出された検出電極のうち一方の位置が押された場合と他方の位置が押された場合とで、第1抵抗での電圧降下の有無が異なり、さらに複数の第2検出電極のいずれかでの電圧降下が異なるからである。
◎電源が複数の第2検出電極の少なくとも1つに電圧を印加するステップ
◎電圧検出器が基準抵抗の電圧降下を測定するステップ
◎測定された電圧降下の値に基づいて、互いに接続された複数の検出電極のいずれの位置が押されたかを判断するステップ
(1)タッチパネル装置
図1、図2及び図3を用いて、第1実施形態のタッチパネル装置1を説明する。図1及び図2は、第1実施形態に係るタッチパネル装置の模式的平面図である。なお、図1は、上側電極群とそれに接続された引き回し配線とを示す図であり、図2は、下側電極群とそれに接続された引き回し配線とを示す図である。図3は、タッチパネルの断面図である。タッチパネル装置1は、例えば、スマートフォン、タブレットPC、ノートPCや、それらのアクセサリに採用される。
上側電極群13と下側電極群17は、酸化錫、酸化インジウム、酸化アンチモン、酸化亜鉛、酸化カドミウム、若しくはITO等の金属酸化物、又は、金、銀、銅、錫、ニッケル、アルミニウム、若しくはパラジウム等の金属や導電性ポリマーの薄膜によって形成されてもよい。
上側電極群13と下側電極群17は、カーボン、銀などの導電性を有するペーストまたは、不透明の導電性インキによって形成されてもよい。導電性インキは、バインダー中に導電性物質を混入したインキである。導電性物質として、例えば、カーボンナノチューブ、金属粒子、金属ナノファイバー、導電性樹脂高分子であるPEDOT(ポリエチレンジオキシチオフェン)が挙げられる。
スペーサ14によって、上側電極群13と下側電極群17は、平面視において重なって配置され、上下方向に隙間を空けて対向している。したがって、上側電極群13の領域が下側電極群17に向かって押し下げられると、押し下げ領域に位置付けられている上側電極と下側電極が電気的に導通する。押し下げは、例えば、指、スタイラスペン、棒などで行えばよい。
なお、上記の積層構造において、具体的な層の数、種類、積層順番は特に限定されない。
上側電極群13は、上側電極X1~X10からなり、各上側電極は図1の左右方向であるX方向に長く延びている。下側電極群17は、下側電極Y1~Y10からなり、各下側電極は図1の上下方向であるY方向に長く延びている。なお、上側電極群及び下側電極群の個数、形状、位置は本実施形態に限定されない。
なお、図1の点線22で示す矩形の内側(つまり、中央部分)が上記のマトリックスが形成されたセンサ領域23であり、点線22より外側(つまり、中央部分を囲む縁部分)が額縁領域24である。
なお、この実施形態では、電極X2と電極X9は、他の電極に接続されていないが、電極の数が多い他の実施形態では、それぞれ他の電極に接続される。
以上のように、互いに電気的に接続されていない検出電極同士が隣接する配置において、さらに、互いに電気的に接続された検出電極の組が含まれ、具体的には、2本の電極同士が互いに電気的に接続された組が含まれている。
なお、「Y方向に隣接する2本の検出電極の電気的組合せ同士は互いに異なっている」とは、互いに電気的に接続された検出電極を1つの電極として考えた場合に、Y方向に隣接する2本の検出電極の組み合わせ同士に同じものが存在しないことを意味する。上記の例では、第1電極(X1)と第2電極(X4)は互いに電気的に接続されているので1つの電極として考え、さらに第3電極(X3)と第4電極(X6)は互いに電気的に接続されているので1つの電極として考える。
なお、この実施形態では、電極Y2と電極Y9は、他の電極に接続されていないが、電極の数が多い他の実施形態では、それぞれ他の電極に接続される。
以上のように、互いに電気的に接続されていない検出電極同士が隣接する配置において、さらに、互いに電気的に接続された検出電極の組が含まれ、具体的には、2本の電極同士が互いに電気的に接続された各組が含まれている。
なお、「X方向に隣接する2本の検出電極の電気的組合せ同士は互いに異なっている」とは、互いに電気的に接続された検出電極を1つの電極として考えた場合に、X方向に隣接する2本の検出電極の組み合わせ同士に同じものが存在しないことを意味する。上記の例では、第1電極(Y1)と第2電極(Y4)は互いに電気的に接続されているので1つの電極として考え、さらに第3電極(Y3)と第4電極(Y6)は互いに電気的に接続されているので1つの電極として考える。
また、上側電極群13及び下側電極群17から抵抗膜式タッチパネル2の入出力端までは、引き回し配線30A~30Gが設けられる。引き回し配線30は、通常、金、銀、銅、若しくは、ニッケルなどの金属あるいはカーボンなどの導電性を有するペーストを用い、スクリーン印刷、オフセット印刷、グラビア印刷、若しくは、フレキソ印刷などの印刷法、又は、刷毛塗法などによって行うが、FPC29と上側電極群13及び下側電極群17との間の導通を図ることができればこれに限定されない。引き回し配線30A~30Gは、それぞれ、FPC29に接続される端子部を有している。なお、タッチパネルへの接続手段は実施形態に限定されない。例えば、FPCを用いなくてもよい。
また、タッチパネル・コントローラはFPC上に設けられていてもよい。
以上に述べたように引き回し配線の数は、従来であれば10本必要であるところを6本に減らせている。また、引き回し配線の数が増えれば増えるほど、配線数が1/2に近くなる。
以上に述べたように引き回し配線の数は、従来であれば10本必要であるところを6本に減らせている。また、引き回し配線の数が増えれば増えるほど、配線数が1/2に近くなることが分かる。
図4、図5及び図6を用いて、タッチパネル・コントローラ21による押し下げ検出制御を説明する。図4は、座標決定制御のフローチャートである。図5及び図6は、タッチパネルの部分平面図である。
なお、この実施形態では、一方向に隣接する2本の電極が押し下げられた状態になれば当該押し下げ位置を正しく決定できるようになっている。したがって、スタイラスペン等の一定幅の先端形状を有している入力部材を用いることが好ましい。
タッチパネル・コントローラ21は、次に、候補となる下側電極を決定する(ステップS2)。上記いずれの場合も、決定方法は従来のマトリクス抵抗膜方式によるので、ここでは説明を省略する。
なお、上記の検出制御において、タッチパネル・コントローラ21は、複数のポイントの押し下げを検出することができる。
前記実施形態では、2本の検出電極が互いに電気的に接続された対が複数配置されていたが、互いに電気的に接続された検出電極の対が1つでもあれば引き回し配線の本数を減らすことができるので、前記実施形態には限定されない。以下に、3本の検出電極が互いに電気的に接続された組を配置した実施形態を説明する。
図7及び図8を用いて、本発明の第2実施形態に係るタッチパネル装置101を説明する。図7は、第2実施形態に係るタッチパネル装置の模式的平面図である。図8は、タッチパネルの部分平面図である。なお、第1実施形態と共通部分については、説明を適宜省略する。
なお、この実施形態では、一方向に隣接する3本の電極が押し下げられた状態になれば当該押し下げ位置を正しく決定できるようになっている。したがって、スタイラスペン等の一定の先端形状を有している入力部材を用いることが好ましい。
上側電極群113は、Y方向に並んだ上側電極X1~X17からなり、各上側電極は図7の左右方向であるX方向に長く延びている。下側電極群117は、X方向に並んだ下側電極Y1~Y8からなり、各下側電極は図7の上下方向であるY方向に長く延びている。
なお、図7の点線122で示す矩形の内側(つまり、中央部分)が上記のマトリックスが形成されたセンサ領域123であり、点線122より外側(つまり、中央部分を囲む縁部分)が額縁領域124である。
なお、この実施形態では、電極X2と電極X16は、他の電極に接続されていないが、電極の数が多い他の実施形態では、それぞれ他の電極に接続される。
以上のように、互いに電気的に接続されていない検出電極同士が隣接する配置において、さらに、互いに電気的に接続された検出電極の組が複数含まれ、具体的には、3本の電極同士が互いに電気的に接続された組が含まれている。
この抵抗膜式タッチパネル102では、例えば、Y方向において、第1組の第1検出電極(X1)、他の第2組の第6検出電極に相当する電極(X2)、第1組の第2検出電極(X3)、第2組の第4検出電極(X4)、第1組の第3検出電極(X5)、第2組の第5検出電極(X6)、他の第1組の第1検出電極(X7)、第2組の第6検出電極(X8)の順番で各電極が配置される。このようにY方向に隣接する3本の検出電極の電気的組合せ同士は互いに異なっているので、例えば3本の電極が検出された場合に、その組み合わせは一意的に決定される。
以上のように、互いに電気的に接続されていない検出電極同士が隣接する配置において、さらに、互いに電気的に接続された検出電極の複数の組が含まれ、具体的には、3本の電極同士が互いに電気的に接続された組が含まれている。
なお、下側電極群に接続された引き回し配線の説明は省略する。
図8に示すように、E領域において押し下げが行われたとする。E領域は電極X3、電極X4及び電極X5に対応している。この場合、検出された電極に対応する引き回し配線は引き回し配線130Aと引き回し配線130Eとになるので、例えば電極X3と電極X4が押し下げられ、同時に他の押し下げポイントとして電極X4と電極X5とが押し下げられた場合と区別できない。そこで、タッチパネル・コントローラ121は、E領域の中心付近であるF領域を検出位置であると暫定的に判断する。
続いて、押し下げ位置が図8の右斜め上方向のG領域に移動すれば、対応する検出電極は電極X2、電極X3、電極X4となるので、タッチパネル・コントローラ121は、押し下げ位置が移動したことが分かる。また、押し下げ位置が図8の右斜め下方向のH領域に移動すれば、その時点では、対応する検出電極は電極X4、電極X5、電極X6となり対応する引き回し配線が変化しないので、タッチパネル・コントローラ121は押し下げ位置が移動したことが分からない。しかし、押し下げ位置がさらに移動を続けて図8の左斜め下方向のI領域に移動すれば、対応する検出電極は電極X5、電極X6、X7となり対応する引き回し配線が変化するので、タッチパネル・コントローラ121は押し下げ位置が移動したことが分かる。
前記第2実施形態では、3本の検出電極が互いに電気的に接続された複数の組が向きを交互に変えて配置されていたが、互いに電気的に接続された検出電極の組が1つでもあれば引き回し配線の本数を減らすことができるので、前記実施形態には限定されない。以下に、3本の検出電極が互いに電気的に接続された組が複数配置されており、各組の形状及び向きが同じになる実施形態を説明する。
図9を用いて、本発明の第3実施形態に係るタッチパネル装置201を説明する。図9は、第3実施形態に係るタッチパネル装置の模式的平面図である。なお、第1実施形態及び第2実施形態との共通部分については、説明を適宜省略する。特に、下側電極群及びそれに接続された引き回し配線の説明は省略する。
上側電極群213は、Y方向に並んだ上側電極X1~X14からなり、各上側電極は図9の左右方向であるX方向に長く延びている。
なお、図9の点線222で示す矩形の内側(つまり、中央部分)が上記のマトリックスが形成されたセンサ領域223であり、点線222より外側(つまり、中央部分を囲む縁部分)が額縁領域224である。
なお、この実施形態では、電極X2と電極X13は、他の電極に接続されていないが、電極の数が多い他の実施形態では、それぞれ他の電極に接続される。
以上のように、互いに電気的に接続されていない検出電極同士が隣接する配置において、さらに、互いに電気的に接続された検出電極の組が複数含まれ、具体的には、3本の電極同士が互いに電気的に接続された組が含まれている。
第1側電極(例えば、電極X4)と中間電極(例えば、電極X6)とは、X方向の第1端(図9の左側端)同士が接続されている。中間電極(例えば、電極X6)と第2側電極(例えば、電極X8)とはX方向において第1端と反対側の第2端(図9の右側端)同士が接続されている。第1側電極(例えば、電極X4)と中間電極(電極X6)との間には他の組の第2側電極(例えば、電極X5)が配置されている。中間電極(例えば、電極X6)と第2側電極(例えば、電極X8)との間には他の組の第1側電極(例えば、電極X7)が配置されている。
この抵抗膜式タッチパネル202では、例えば、Y方向において、第1の組の第1側電極(例えば、電極X4)、他の組の第2側電極(例えば、電極X5)、第1の組の中間電極(例えば、電極X6)、第2の組の第1側電極(例えば、電極X7)、第1の組の第2側電極(電極X8)、第2の組の中間電極(例えば、電極X9)、他の組の第1側電極(例えば、電極X10)、第2の組の第2側電極(例えば、電極X11)の順番で各電極が配置される。このようにY方向に隣接する3本の検出電極の電気的組合せ同士は互いに異なっているので、例えば3本の電極が検出された場合に、その組み合わせは一意的に決定される。
さらに、この実施形態では、引き回し配線の大半が額縁領域224の片側領域に配置できる。
前記第1~第3実施形態では、複数の検出電極が互いに接続された組同士がさらに組み合わされていたが、互いに電気的に接続された検出電極の組が1つでもあれば引き回し配線の本数を減らすことができるので、前記実施形態には限定されない。以下に、複数の検出電極が互いに接続された組と単独の電極とを互いに組み合わせて配置した実施形態を説明する。
図10を用いて、本発明の第4実施形態に係るタッチパネル装置301を説明する。図10は、第4実施形態に係るタッチパネル装置の模式的平面図である。なお、第1実施形態、第2実施形態及び第3実施形態との共通部分については、説明を適宜省略する。特に、下側電極群及びそれに接続された引き回し配線の説明は省略する。
上側電極群313は、Y方向に並んだ上側電極X1~X14からなり、各上側電極は図10の左右方向であるX方向に長く延びている。
なお、図10の点線322で示す矩形の内側(つまり、中央部分)が上記のマトリックスが形成されたセンサ領域323であり、点線322より外側(つまり、中央部分を囲む縁部分)が額縁領域324である。
電極X4と電極X8との間には、Y方向に順番に、電極X5、電極X6、電極X7が配置されている。電極X6は他の電極に接続されていない。
電極X7と電極X11との間には、Y方向に順番に、電極X8、電極X9、電極X10、電極X11が配置されている。電極X9は他の電極に接続されていない。
この実施形態では、同じ検出電極(電気的に互いに接続されたものは同じとする)が4本おきにしか現れないので、検出された検出電極の本数が3本までは、同じ組み合わせが生じないという利点がある。
上記第1~第4実施形態は、下記の構成及び機能を共通に有している。
タッチパネル(例えば、抵抗膜式タッチパネル2、102,202、302)は、基材と、複数の検出電極と、複数の引き回し配線とを備えている。複数の検出電極(例えば、第1実施形態の図1の上側電極X1~X10、第2実施形態の図7の上側電極X1~X17、第3実施形態の図9の上側電極X1~X14、第4実施形態の図10の上側電極X1~X14)は、基材(例えば、透明絶縁フィルム11、111、211、311)の第1面(例えば、下面)に形成されて第1方向(例えば、X方向)に並んで配置された検出電極であり、互いに電気的に接続された検出電極の複数の組(例えば、第1の実施形態の電極X1と電極X4、第2実施形態の電極X1、電極X3及び電極X5、第3実施形態の電極X1、電極X3及び電極X5、第4実施形態の電極X1及び電極X5)を含みつつ予定同時検出本数(第1実施形態及び第4実施形態では2本、第2実施形態及び第3実施形態では3本)と同数で第1方向に隣接する検出電極の電気的組み合わせ同士は互いに異なっている。
複数の引き回し配線(例えば、第1実施形態の引き回し配線30A~30F、第2実施形態の配線130A~130G、第3実施形態の配線230A~203E、第4実施形態の配線330A~330J)は、複数の検出電極から延び、第1面において複数の検出電極より外側の領域(例えば、額縁領域24、124、224、324)に形成されている。
また、予定同時検出本数と同数で第1方向に隣接する検出電極の電気的組み合わせ同士は互いに異なっているので、例えば予定同時検出本数の電極が検出された場合に、その組み合わせは一意的に決定される。
上記の構成を複数用意してそれらを積層方向に並べて、しかも電極の延びる方向を交差させるように配置することで、平面における押し下げ位置を検出できる。
タッチパネルにおける抵抗膜マトリックス(デジタル)検出方式の構成及び方法を詳細に説明する。なお、この実施形態は、第1~第4実施形態におけるタッチパネル・コントローラの詳細説明である。
タッチパネル・コントローラ21は、制御部403と、記憶部405と、検出回路407とを有している。制御部403は、CPUからなる。記憶部405は、RAM、ROMからなり、プログラム及びデータを保存する。検出回路407は、装飾用フィルム7が押圧された位置を検出するための回路であり、直流電源409と、電圧検出器411とを有している。直流電源409は、上側電極X1~X10及び下側電極Y1~Y10に電力を供給する。電圧検出器411は、上側電極X1~X10及び下側電極Y1~Y10に接続されている(後述)。
第1に、制御部403は、スイッチ回路401のスイッチ401aを制御することで、直流電源409の直流電圧を下側電極Y1~Y10に印加する。そして、制御部403は、スイッチ回路401のスイッチ401aを制御することで、電圧検出器411を用いて上側電極X1~X10に対応する電圧の発生を順番に検出する。電圧が発生するとは、例えば電極X1に対応する10個の交差マトリックスのいずれかが押下げられ当該交差マトリックスが電気導通状態にあることを意味している。制御部403は、電圧が検出された上側電極を候補電極として405に記憶する。このステップは、図4のステップS1に対応している。
第1実施形態及び第5実施形態の組合せの変形例として、以下に第6実施形態を説明する。なお、基本的な構造及び動作は同じであるので、第1実施形態及び第5実施形態と異なる点を中心に説明する。なお、本実施形態では、互いに接続された2本の電極のいずれが押されたかを電圧検出器が判別可能な電圧検出構成が開示されている。
図12を用いて、上側電極群と下側電極群を説明する。図12は、タッチパネルの部分平面図である。
上側電極群13Aは、上側電極X1~X10からなり、各上側電極は図12の左右方向であるX方向に長く延びている。
下側電極群17Aは、図示していないが、下側電極Y1~Y10からなり、各下側電極は図12の上下方向であるY方向に長く延びている。下側電極Y1~10は、上側電極X1~X10と隙間を空けて対向し、上側電極X1~X10に当接可能である。なお、図12には、電極Y5のみが示されている。
抵抗RS1は、所望の抵抗値を実現できればよく、材料は限定されない。抵抗RS1は、ITO、CNT、PEDOTなどの透明導電材料からなるパターンであってもよい。また、抵抗RS1は、カーボン、銀などの導電性を有するペーストからなるパターンであってもよい。銀の場合は、線幅を細くして抵抗値を高めてもよい。さらに、抵抗RS1は、チップ抵抗器のような部材によって実現されてもよい。抵抗RS1は、上記の構成を適宜組み合わせて実現されてもよい。
以上より、各部材の材料の組み合わせの一例として、電極及び引き回し配線に銀を用いて、複数電極同士を接続する部分にカーボンを用いることが考えられる。
以下、候補電極の選択動作を説明するが、説明の簡便化のために、電極Y5に電圧が印加されており、電極Y5において電極X3と電極X6のいずれかが押される場合に、電極X3又は電極X6を候補電極として選択する制御を説明する。直流電源409から電圧VDが電極Y5に印加された場合に、電極X3と電極Y5との交点である点P2又は電極X6と電極Y5との交点である点P1が押されれば、電圧検出器411は、抵抗RBにおける電圧降下を測定可能である。つまり、以上の構成において、電圧検出器411における測定値によって、制御部403が電極X3又は電極X6のいずれの位置が押されたかを判断できる。
なお、電極Y5における直流電源409から点P1までの抵抗成分が抵抗R1であり、電極Y5における点P1から点P2までの抵抗成分が抵抗R2である。このように電極Y5において所定の抵抗成分が得られるように、電極Y1~Y10は、例えば、カーボン又はITOによって抵抗値を高くしてもよい。下側電極Y1~Y10は、シート抵抗が50[Ω]を超える材料から構成されることが好ましい。この場合、下側電極Y1~Y10の抵抗値は上側電極X1~X10の抵抗値と同じ程度でも良いが、高い方が好ましい。その場合は、各部材の材料の組み合わせの一例として、上側電極X1~X10に銀又は銀及びカーボンを用いて、下側電極Y1~Y10にITO又はカーボンを用いてもよい。
このタッチパネルでは、直流電源409が電極Y5に電圧を印加した状態で電圧検出器411が抵抗RBの電圧降下を測定すれば、その値によって、制御部403が、互いに接続された電極X3及び電極X6のいずれの位置が電極Y5に対応して押されたのかを判別可能である。それは、電極X3の位置が押された場合と電極X6の位置が押された場合とで、抵抗RS1での電圧降下の有無が異なり、さらに電極Y5での電圧降下が異なるからである。
VB=(RB*VD)/(RB+RS1+R1)
図14に示すようにL領域が押された(電極X6が押された)場合には、図15に示すように抵抗R1と、抵抗RBとが直列に接続された状態になる。したがって、電圧検出器411によって測定されたVAは下記の通りになる。
VA=(RB*VD)/(RB+R1+R2)
VAB=[RB/(RB+RS)]*VD (ただし、RS=R1+(RS1*R2)/(RS1+R2))
なお、上記の説明では、合計3本の電極(例えば、電極X3、電極X4、電極X5)の領域が押された場合を説明しているが、合計1本の電極が押された場合にも、電極X6が押されずに電極X3だけが押された場合(点P2が押された場合)と、電極X3が押されずに電極X6だけが押された場合(点P1が押された場合)とを区別可能である。
第2実施形態及び第5実施形態の組合せの変形例として、以下に第7実施形態を説明する。なお、基本的な構造及び動作は同じであるので、第2実施形態及び第5実施形態と異なる点を中心に説明する。なお、本実施形態では、互いに接続された3本の電極のいずれが押されたかを電圧検出器が判別可能な電圧検出構成が開示されている。
図16を用いて、上側電極群と下側電極群を説明する。図16は、タッチパネルの部分平面図である。この実施形態では、一方向に隣接する3本の電極が押し下げられた状態になれば当該押し下げ位置を正しく決定できるようになっている。
上側電極X1~X17について、詳細に説明する。電極X1と電極X3とX5が互いに電気的に接続され、電極X7と電極X9と電極X11が互いに接続され、電極X13と電極X15と電極X17とが互いに接続されている。以上のように、互いに電気的に接続されていない検出電極同士が隣接する配置において、さらに、互いに電気的に接続された検出電極の組が複数含まれ、具体的には、3本の電極同士が互いに電気的に接続された組が含まれている。上記の接続箇所は、各電極のX方向第1側端(図16左側端)である。接続構造として、抵抗RS1、抵抗RS2がそれぞれ設けられている。さらに、電極X4と電極X6とX8が互いに電気的に接続され、電極X10と電極X12と電極X14が互いに接続されている。上記の接続箇所は、各電極のX方向第2側端(図16の右側端)である。接続構造として、抵抗RS1、抵抗RS2がそれぞれ設けられている。
以下、候補電極の選択動作を説明するが、説明の簡便化のために、電極Y5に電圧が印加されており、電極Y5において電極X3と電極X6のいずれかが押される場合の、電極X3又は電極X6を候補電極として選択する制御を説明する。直流電源409から電圧VDが電極Y5に印加された場合に、電極X1と電極Y5との交点である点P1、電極X3と電極Y5との交点である点P2、又は電極X5と電極Y5との交点である点P3が押されれば、電圧検出器411は、抵抗RBにおける電圧降下Vを測定可能である。つまり、以上の構成において、直流電源409が例えば電極Y5に電圧を印加している場合に、電圧検出器411が電極X1、電極X3又は電極X5からの電圧を測定可能である。
なお、電極Y5における直流電源409から点P1までの抵抗成分が抵抗R1であり、電極Y5における点P1から点P2までの抵抗成分が抵抗R2であり、電極Y5における点P2から点P3までの抵抗成分が抵抗R3である。
このタッチパネルでは、直流電源409が電極Y5に電圧を印加した状態で電圧検出器411が抵抗RBの電圧降下を測定すれば、その値によって、制御部403が、互いに接続された電極X1、電極X3及び電極X5のいずれが電極Y5に対応して押されたのかを判別可能である。それは、互いに接続された検出電極のうち押された位置の電極によって、抵抗RS1、抵抗RS2での電圧降下の有無が異なり、さらに電極Y5での電圧降下が異なるからである。
電極X1が押された場合には、図17に示すように電極Y5における直流電源409から点P1までの抵抗R1と、抵抗RS1と、抵抗RS2と、抵抗RBとが直列に接続された状態になる。したがって、電圧検出器411によって測定されたV1は下記の通りになる。
V1=(RB*VD)/(RB+RS1+RS2+R1)
電極X3が押された場合には、図18に示すように電極Y5における直流電源409から点P1までの抵抗R1と、点P1から点P2までの抵抗R2と、抵抗RS2と、抵抗RBとが直列に接続された状態になる。したがって、電圧検出器411によって測定されたV2は下記の通りになる。
V2=(RB*VD)/(RB+RS2+R1+R2)
電極X5が押された場合には、図19に示すように電極Y5における直流電源409から点P1までの抵抗R1と、点P1から点P2までの抵抗R2と、点P2から点P3までの抵抗R3と、抵抗RBとが直列に接続された状態になる。したがって、電圧検出器411によって測定されたV3は下記の通りになる。
V3=(RB*VD)/(RB+R1+R2+R3)
以上よりV1、V2、V3が互いに異なるので、電極X3及びX5が押されずに電極1だけが押された場合、電極X1及びX5が押されずに電極X3だけが押された場合、電極X1及び電極X3が押されずに電極X5が押された場合を、制御部403が区別可能である。
なお、この構成によって、電極X1と電極X3が押された場合、電極X3と電極X5が押された場合、電極X1、電極X3及び電極X5が押された場合も、制御部403が互いに区別できる。
以上、本発明の複数の実施形態について説明したが、本発明は上記実施形態に限定されるものではなく、発明の要旨を逸脱しない範囲で種々の変更が可能である。特に、本明細書に書かれた複数の実施形態及び変形例は必要に応じて任意に組み合せ可能である。
前記第1~第4実施形態では検出電極同士はバスパー電極によって接続されていたが、検出電極同士の接続方法は前記実施形態に限定されない。例えば、引き回し配線の一部を用いて検出電極同士を接続してもよい。
2,102,202,302 :抵抗膜式タッチパネル
3 :上側電極部材
5 :下側電極部材
11,111,211,311 :透明絶縁フィルム
13,113,213,313 :上側電極群
15 :透明絶縁フィルム
17,117 :下側電極群
21,121,221,321 :タッチパネル・コントローラ
23,123,223,323 :センサ領域
24,124,224,324 :額縁領域
30A~30F,130A~130G,230A~230F,330A~330J :引き回し配線
31A~31F :引き回し配線
X1~X10: 上側電極
Y1~Y10: 下側電極
Claims (10)
- 基材と、
前記基材の第1面に形成されて第1方向に並んで配置された検出電極であり、互いに電気的に接続された検出電極の組を含みつつ予定同時検出本数と同数で前記第1方向に隣接する検出電極の電気的組み合わせ同士は互いに異なっている、複数の検出電極と、
前記複数の検出電極から延び、前記基材の第1面において前記複数の検出電極より外側の領域に形成されている複数の引き回し配線と、
を備えたタッチパネル。 - 前記互いに電気的に接続された検出電極の数は2本ずつであり、前記第1方向に隣接する2本の検出電極の電気的組合せ同士は互いに異なっている請求項1に記載のタッチパネル。
- 前記複数の検出電極は、互いに接続された第1電極及び第2電極からなる第1対と、互いに接続された第3電極と第4電極からなる第2対とを有しており、
前記第3電極は、前記第1方向における前記第1電極と前記第2電極との間の前記第2電極に近い側に配置されており、前記第1方向における前記第1電極と前記第3電極との間には他の第2対の第4電極が配置される隙間が確保されており、
前記第2電極は、前記第1方向における前記第3電極と前記第4電極との間の前記第3電極に近い側に配置されており、前記第1方向における前記第2電極と前記第4電極との間には他の第1対の第1電極が配置される隙間が確保されている、請求項2に記載のタッチパネル。 - 前記互いに電気的に接続された検出電極の数は3本ずつであり、前記第1方向に隣接する3本の検出電極の電気的組合せ同士は互いに異なっている、請求項1に記載のタッチパネル。
- 前記複数の検出電極は、互いに接続され前記第1方向に順番に並んだ第1検出電極、第2検出電極及び第3検出電極からなる第1組と、互いに接続され前記第1方向に順番に並んだ第4検出電極、第5検出電極及び第6検出電極とからなる第2組とを有し、
前記第1方向における前記第2検出電極と前記第3検出電極との間に前記第4検出電極が配置され、
前記第1方向における前記第4検出電極と前記第5検出電極との間に前記第3検出電極が配置され、
前記第1方向における前記第1検出電極と前記第2検出電極との間には他の第2組の第6検出電極が配置される隙間が確保されており、
前記第1方向における前記第5検出電極と前記第6検出電極との間には他の第1組の第1検出電極が配置される隙間が確保されている、請求項4に記載のタッチパネル。 - 前記複数の検出電極は、互いに接続され前記第1方向に順番に並んだ第1側電極と、中間電極と、第2側電極とからなる複数の組を有しており、
前記第1側電極と前記中間電極とは、前記第1方向と交差する方向である第2方向の第1端同士が接続され、
前記中間電極と前記第2側電極とは前記第2方向において前記第1端と反対側の第2端同士が接続されており、
前記第1側電極と前記中間電極との間には、他の組の第2側電極が配置される隙間が確保されており、
前記中間電極と前記第2側電極との間には他の組の第1側電極が配置される隙間が確保されている、請求項4に記載のタッチパネル。 - 前記第1方向に交差する第2方向に並びかつ前記複数の検出電極に重なって配置された第2検出電極であり、互いに電気的に接続された第2検出電極の組を含みつつ予定同時検出本数と同数で前記第2方向に隣接する第2検出電極の電気的組み合わせ同士は互いに異なっている、複数の第2検出電極と、
前記複数の第2検出電極から延び、前記複数の第2検出電極より外側の領域に形成されている複数の第2引き回し配線とをさらに備えた、請求項1に記載のタッチパネル。 - 前記互いに電気的に接続された検出電極同士の間に設けられた第1抵抗と、
前記第1抵抗に直列に接続された基準抵抗と、
前記複数の検出電極と隙間を空けて対向し、前記複数の検出電極に当接可能な複数の第2検出電極と、
前記複数の第2検出電極の少なくとも1つに電圧を印加する電源と、
前記基準抵抗における電圧降下を測定する電圧検出器と、
をさらに備えた請求項1~6のいずれかに記載のタッチパネル。 - 前記複数の第2検出電極は、前記複数の検出電極に比べて抵抗値が高い材料から構成されている、請求項8に記載のタッチパネル。
- 請求項8~9のいずれかに記載のタッチパネルの押圧位置検出方法であって、
前記電源が複数の第2検出電極の少なくとも1つに電圧を印加するステップと、
前記電圧検出器が前記基準抵抗の電圧降下を測定するステップと、
測定された電圧降下の値に基づいて、前記互いに接続された複数の検出電極のいずれの位置が押されたかを判断するステップと、
を備えたタッチパネルの押圧位置検出方法。
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