WO2022249495A1 - センサ - Google Patents
センサ Download PDFInfo
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- WO2022249495A1 WO2022249495A1 PCT/JP2021/020573 JP2021020573W WO2022249495A1 WO 2022249495 A1 WO2022249495 A1 WO 2022249495A1 JP 2021020573 W JP2021020573 W JP 2021020573W WO 2022249495 A1 WO2022249495 A1 WO 2022249495A1
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- Prior art keywords
- coils
- lead wires
- wiring layer
- sensor
- lead
- Prior art date
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Images
Classifications
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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
- G06F3/033—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor
- G06F3/0354—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor with detection of 2D relative movements between the device, or an operating part thereof, and a plane or surface, e.g. 2D mice, trackballs, pens or pucks
- G06F3/03545—Pens or stylus
-
- 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
-
- 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
- G06F3/046—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by electromagnetic means
Definitions
- the present invention relates to a sensor, and more particularly to a sensor that is superimposed on a display device and used.
- a position detection device that detects the position of a position indicator by detecting an alternating magnetic field sent from the position indicator with a sensor.
- Specific methods of this type of position detection device include the EM method, which requires a battery to be provided in the position indicator, and the EM method, which generates electric power in the position indicator by means of electromagnetic waves sent out by the position detection device through the sensor.
- EMR registered trademark
- EMR registered trademark
- a sensor of a position detection device generally includes a plurality of first coils (loop electrodes) elongated in the long side direction of the detection area, and second coils (loop electrodes) elongated in the short side direction of the detection area. electrodes).
- Patent Document 1 discloses an example of a sensor of a position detection device having such first and second coils.
- the connecting point of each coil and each lead wire is provided in the center of the detection area instead of the edge, and each lead wire is extended into the detection area, thereby eliminating the invalid area generated outside the detection area. Minimization is achieved.
- Patent Document 2 discloses an example of a sensor of a position detection device in which each of the first and second coils is obliquely formed.
- Patent No. 4405247 International Publication No. 2019/171511
- each lead wire extends parallel to each coil. According to this configuration, since a large magnetic coupling occurs between the lead wire and each coil, a signal flowing through one may be superimposed on the other. If the first and second coils described in Patent Document 1 are formed obliquely as in Patent Document 2, the section in which the lead wire and each coil run in parallel is shortened, and the magnetic coupling between them is reduced. However, since the first and second coils are obliquely formed, there is a problem that coordinate transformation is required when calculating the coordinates of the pen.
- one of the objects of the present invention is to provide a sensor that can reduce the magnetic coupling that occurs between the lead wire and each coil without obliquely forming the first and second coils.
- another object of the present invention is to provide a sensor in which oblique lead wires for the first and second coils can be wired in only one layer.
- the position detection device may be configured to acquire the intensity distribution of the alternating magnetic field using two or more adjacent coils and derive the position of the position indicator based on the result. In this case, if there is a large difference in parasitic resistance between two or more adjacent coils, the obtained intensity distribution will be distorted, which may make it impossible to derive the correct position.
- Another object of the present invention is to provide a sensor capable of correctly deriving the position of the position indicator by the position detection device.
- a sensor includes a plurality of first coils each extending in a first direction parallel to one side of a rectangular detection area, and a plurality of second coils each orthogonal to the first direction.
- a plurality of coils including a plurality of second coils extending in a direction; a plurality of terminals provided corresponding to one end and the other end of each of the plurality of coils; each of the plurality of terminals; and a plurality of lead wires connecting one end or the other end of the plurality of coils, each of the plurality of lead wires extending in one or more directions obliquely crossing each of the first and second directions. It is a sensor that extends along a line.
- a sensor according to a second aspect of the present invention is the sensor according to the first aspect of the present invention, wherein the plurality of lead wires are wires formed in a first wiring layer, and the plurality of lead wires are the A plurality of first lead wires connected to one end or the other end of the plurality of first coils, and a plurality of second lead wires connected to one end or the other end of the plurality of second coils and each of the plurality of first lead wires is electrically connected to one end or the other end of the corresponding plurality of first coils at a first connection point provided in the first wiring layer.
- the plurality of terminals, the plurality of first connection points, and the plurality of second connection points are a plurality of first terminals among the plurality of terminals that are connected to the plurality of first coils. and a first region in the first wiring layer including the plurality of first connection points, and a plurality of second terminals among the plurality of terminals connected to the plurality of first coils. and a second region in the first wiring layer including the plurality of second connection points, the sensor being arranged so as not to intersect with the second region.
- a sensor according to a third aspect of the present invention is the sensor according to the first aspect of the present invention, wherein the arrangement of the plurality of terminals, the connection points between the plurality of lead wires and the plurality of coils, and the plurality of The shape of each lead wire is determined so that the absolute value of the moving average deviation rate of the lead wire for each coil is equal to or less than a predetermined value.
- the plurality of lead lines are extended along one or more directions obliquely crossing each of the first and second directions. It is possible to reduce the magnetic coupling that occurs between the lead wire and each coil without obliquely forming the two coils.
- the first region in which the plurality of first lead wires are extended and the second region in which the plurality of second lead wires are extended do not intersect, , obliquely crossing lead wires for the first and second coils can be wired in only one layer.
- the position of the position indicator is correctly derived by the position detection device. becomes possible.
- FIG. 1 is an exploded view of tablet terminal 1 according to an embodiment of the present invention
- FIG. (a) is a side view of the tablet terminal 1
- FIG. (b) is a rear view of the tablet terminal 1.
- FIG. FIG. 2 is a schematic cross-sectional view of the sensor 13 shown in FIG. 1
- 3 is a diagram showing a configuration of wiring included in a wiring layer L1 of the sensor 13
- FIG. 3 is a diagram showing a configuration of wiring included in a wiring layer L2 of the sensor 13
- FIG. 3 is a diagram showing a configuration of wiring included in a wiring layer L3 of the sensor 13
- FIG. 5 is a diagram illustrating details of a bent portion 51 shown in FIG. 4;
- FIG. 3 is a diagram showing a region AX in a wiring layer L1 in which a plurality of lead lines 42x are extended and a region AY in a wiring layer L1 in which a plurality of lead lines 42y are extended; (a) plots the length of the corresponding lead wire 42x (the total length of the two corresponding lead wires 42x) and the moving average deviation rate of the length of the corresponding lead wire 42x for each coil 41x. It is a figure, (b) is the length of the lead wire 42y corresponding to each coil 41y (total length of two corresponding lead wires 42x), and the moving average divergence rate of the length of the corresponding lead wire 42y. and is plotted.
- FIG. 10 is a diagram showing a configuration of wiring included in a wiring layer L1 according to a comparative example; For each coil 100 shown in FIG. 10, the length of the corresponding lead wire 103 (the total length of the corresponding two lead wires 103) and the moving average deviation rate of the length of the corresponding lead wire 103 are plotted. It is a diagram.
- FIG. 10 is a diagram showing a configuration of wiring included in wiring layer L1 of sensor 13 according to a modification of the present embodiment; 4 is a diagram showing the configuration of wiring included in wiring layer L1 of sensor 13 according to the first embodiment;
- FIG. FIG. 10 is a diagram showing the configuration of wiring included in wiring layer L1 of sensor 13 according to the second embodiment; FIG.
- FIG. 10 is a diagram showing the configuration of wiring included in wiring layer L1 of sensor 13 according to the third embodiment
- FIG. 12 is a diagram showing the configuration of wiring included in wiring layer L1 of sensor 13 according to the fourth embodiment
- FIG. 13 is a diagram showing the configuration of wiring included in wiring layer L1 of sensor 13 according to the fifth embodiment
- FIG. 1 is an exploded view of the tablet terminal 1 according to the embodiment of the present invention.
- 2A is a side view of the tablet terminal 1
- FIG. 2B is a rear view of the tablet terminal 1.
- FIG. 1 and 2A the upper side corresponds to the display surface (touch surface) of the tablet terminal 1, and the lower side corresponds to the back surface of the tablet terminal 1.
- FIG. 1 and 2A the upper side corresponds to the display surface (touch surface) of the tablet terminal 1
- the lower side corresponds to the back surface of the tablet terminal 1.
- the tablet terminal 1 includes a display module back cover 10 having a bathtub shape with a closed back side. , glass 18 is laminated. Among them, at least the side surfaces of the sensor 13 and the display panel 16 are covered with a display module frame 17 for protection and fixing.
- the display module frame 17 is, for example, an adhesive tape.
- the tablet terminal 1 further includes a housing that covers the entire tablet terminal 1 (including an integrated circuit 20 and a bent substrate 21 to be described later) except for the surface of the glass 18 .
- the surface of the glass 18 constitutes the display surface and touch surface of the tablet terminal 1 .
- an integrated circuit 20 that constitutes a position detection device together with the sensor 13 is installed.
- a processor processing circuit
- a display panel on the back of the display module back cover 10, in addition to the integrated circuit 20, there are a processor (processing circuit) that controls the entire tablet terminal 1 and plays a role of executing arbitrary applications, and a display panel. 16 control circuits and the like are also arranged.
- a region A shown in FIG. 2B indicates a region in which these circuits can be arranged.
- the tablet terminal 1 is also configured with a bent substrate 21 for connecting the integrated circuit 20 and the sensor 13 .
- 1 and 2B show an example using three bent substrates 21, but the number of bent substrates 21 may be one or more.
- Each bending substrate 21 is a flexible substrate (FPC) made of, for example, a thin plastic film, and is configured to be bendable. Utilizing this property, each folding substrate 21 is arranged in the tablet terminal 1 in a state of being folded so as to involve one side of the sensor 13 and the display panel 16, as shown in FIG. 2(a).
- One end of each bent substrate 21 is introduced into the display module rear cover 10 through the opening 10a of the display module rear cover 10 shown in FIG.
- the other end of each bent substrate 21 is connected to the integrated circuit 20 on the rear surface of the display module rear cover 10 .
- the sensor 13 and the integrated circuit 20 constitute the position detection device of the above-described EM method or EMR (registered trademark) method, and serve to detect the position of the stylus 2 (position indicator) within a predetermined detection area.
- the detection area is a rectangular area set to have an area slightly larger than the display area of the display panel 16, and is arranged so as to overlap the entire display area.
- the integrated circuit 20 detects the pen signal (alternating magnetic field) sent by the stylus 2 via the sensor 13, thereby detecting the position of the stylus 2 within the detection area. Further, when the EMR (registered trademark) system is supported, processing for generating electric power in the stylus 2 by transmitting electromagnetic waves through the sensor 13 is also performed. In this case, the stylus 2 uses the power thus generated to transmit pen signals.
- the display panel 16 is a display device composed of liquid crystal, organic EL, electronic paper, or the like.
- a specific type of the display panel 16 is not particularly limited. Specific display contents of the display panel 16 are controlled by the above-described processor and control circuit.
- the display panel 16 has a rectangular display area in which a plurality of pixels are arranged in a matrix and a bezel area set around the display area. Wiring for connecting each pixel to the control circuit is arranged in the bezel region.
- the sensor 13 is arranged on the back side of the display panel 16 .
- the lead wires 42x and 42y of the coils 41x and 41y are provided in the central portion of the detection area inside the sensor 13 as will be described later, the presence of the lead wires 42x and 42y enables display. A decrease in the visibility of the panel 16 is avoided.
- the shield plate 11 is a magnetic body arranged on the back side of the sensor 13 and functions as an electromagnetic shield to prevent electromagnetic waves generated by the sensor 13 from leaking to the back side.
- the shield plate 11 also serves as a magnetic path for magnetic flux generated by the sensor 13 .
- the spacer 12 is, for example, a double-sided tape, and functions to insulate between the wiring provided on the sensor 13 and the shield plate 11 and to fix the sensor 13 to the shield plate 11 .
- FIG. 3 is a schematic cross-sectional view of the sensor 13.
- the sensor 13 includes, in order from the display surface side, a wiring layer L1 (first wiring layer), an insulating layer 30, a wiring layer L2 (second wiring layer), an insulating layer 31, and a wiring layer L3. (3rd wiring layer) is comprised by the multilayer board
- a plurality of via conductors 35 are also provided within the sensor 13 . Each via conductor 35 penetrates from the wiring layer L1 to the wiring layer L3, and serves to interconnect the wirings in the wiring layers L1 to L3.
- the X-axis direction (first direction) and the Y-axis direction (second direction) shown in these figures are the long side direction and short side direction of the detection area described above, respectively.
- a rectangular area having four coordinates (X1, Y1) (X2, Y1) (X1, Y2) (X2, Y2) as its vertices corresponds to the detection area of the sensor 13 .
- the illustrated A-axis direction (third direction) is a direction that does not coincide with either the X-axis direction or the Y-axis direction.
- the A-axis direction is a direction that forms a predetermined angle larger than 0 degrees and smaller than 90 degrees with the X direction.
- the illustrated B-axis direction (fourth direction) is also a direction that does not coincide with either the X-axis direction or the Y-axis direction.
- the B-axis direction is also set to intersect the A-axis direction.
- the A-axis direction forms an angle of 45 degrees with the X-axis direction, and the A-axis direction and the B-axis direction are set to be perpendicular to each other.
- a plurality of coils 41x (second coils) extending in the Y direction are formed in the wiring layer L3.
- the number of coils 41x is not limited to 42 pieces.
- the coils 41x are arranged at regular intervals in the X direction with a certain amount of overlap.
- a part of each coil 41x is also formed in the wiring layer L1 or the wiring layer L2 through via conductors 35 indicated by black circles in the figure in order to enable wiring in an overlapping state.
- a plurality of coils 41y (first coils) extending in the X direction are formed in the wiring layer L2.
- the coils 41y are arranged at regular intervals in the Y direction with a certain amount of overlap.
- a part of each coil 41y is also formed in the wiring layer L1 or the wiring layer L3 through via conductors 35 indicated by black circles in the figure in order to enable wiring in an overlapping state.
- FIGS. 4 to 6 show an example in which the number of turns of each coil 41x, 41y is 1, but the actual number of turns of each coil 41x, 41y is shown in FIGS. result in a higher number, as shown. For example, it is preferable to set the number of turns of each coil 41x, 41y to 6.
- each of the plurality of coils 41x and 41y is cut at one point in the middle, and via conductors 35 are connected to both end portions resulting from the cutting.
- the via conductors 35 (second via conductors) connected to the ends of the coils 41x are hereinafter referred to as via conductors 35x
- the via conductors 35 (first via conductors) connected to the ends of the coils 41y are hereinafter referred to as via conductors 35x.
- conductor may be referred to as via conductors 35y.
- the wiring layer L1 is configured with terminal groups 40a to 40c connected to the three bent substrates 21 described above, respectively.
- the terminal group 40a is for connecting each coil 41y to the wiring in the bent substrate 21, and is configured with a plurality of internal terminals corresponding to one end or the other end of each coil 41y.
- the terminal groups 40b and 40c are for connecting the coils 41x to the wiring inside the bent substrate 21, and each have a plurality of internal terminals corresponding to one end or the other end of each coil 41x.
- a plurality of lead lines 42x and 42y are formed in the wiring layer L1.
- a plurality of lead wires 42x (second lead wires) are wires provided one-to-one with the ends of the plurality of coils 41x, and connect corresponding via conductors 35x and corresponding internal terminals in terminal groups 40b and 40c. play a connecting role.
- the end of each via conductor 35x exposed in the wiring layer L1 forms a connection point (second connection point) between the corresponding lead wire 42x and the end of the corresponding coil 41x.
- a plurality of lead wires 42y are wiring provided one-to-one with the ends of the plurality of coils 41y, and connect the corresponding via conductors 35y and the corresponding internal terminals in the terminal group 40a. serve to connect The end of each via conductor 35y exposed in the wiring layer L1 constitutes a connection point (first connection point) between the corresponding lead wire 42y and the end of the corresponding coil 41y.
- the integrated circuit 20 sequentially detects the potential difference between the corresponding two lead wires 42x for each of the plurality of coils 41x. do.
- the potential difference thus detected represents the received strength of the pen signal transmitted by the stylus 2 .
- the integrated circuit 20 selects the coil 41x with the largest reception intensity detected in this way and a predetermined number of coils 41x located in the vicinity thereof, and based on the reception intensity of the pen signal detected for each, the pen in the X direction. Derive the intensity distribution of the signal. Then, the position of the vertex of the distribution is derived and acquired as the X coordinate of the stylus 2 .
- the integrated circuit 20 derives the Y coordinate of the stylus 2 by performing similar processing for the Y direction, and outputs the derived set of the X coordinate and the Y coordinate to the processor described above.
- each of the plurality of lead lines 42x, 42y extends along either the A direction or the B direction, except for some exceptions. By doing so, the lead wires 42x and 42y and the coils 41x and 41y do not run parallel to each other in most of the plurality of lead wires 42x and 42y. It is possible to reduce the magnetic coupling that occurs between the plurality of lead wires 42x, 42y and the respective plurality of coils 41x, 41y.
- each of the connecting portion 50, the bent portion 51, and the connecting portion 52 is denoted by a single reference numeral, but the same applies to portions not denoted by a reference numeral.
- FIG. 7 is a diagram explaining the details of the bending portion 51.
- the actual bent portion 51 is a portion (hereinafter referred to as an "intermediate portion") extending in the intermediate direction between the A direction and the B direction (the Y direction in FIG. 7) as shown in FIG. )have.
- This is a configuration for preventing the etchant from remaining on the bent portion 51 when the lead lines 42x and 42y are formed by etching. By doing so, it becomes possible to form the shape of the lead wires 42x and 42y in the bent portion 51 accurately.
- the intermediate portion of the bent portion 51 is formed with a necessary and sufficient length to prevent the etchant from remaining.
- the connecting portions 50 and 52 are formed with a necessary and sufficient length for connecting the respective connection destinations (the terminal groups 40a to 40c or the via conductors 35x and 35y) to the lead wires 42x and 42y. Therefore, the lengths of the intermediate portion of the bent portion 51 and the lengths of the connecting portions 50 and 52 are sufficiently shorter than the total lengths of the lead wires 42x and 42y.
- the length of each of the middle portion of the bent portion 51 and the connecting portions 50 and 52 is such that each of the plurality of lead wires 42x and 42y is at least 80% or more, more preferably 90% or more of each.
- the second feature is that a region (second region) in the wiring layer L1 in which a plurality of lead lines 42x extend and a region (first region) in the wiring layer L1 in which a plurality of lead lines 42y extend. ), the terminal groups 40a to 40c and the plurality of via conductors 35x and 35y are arranged so as not to cross each other. By doing so, it becomes possible to wire each of the plurality of lead lines 42x and 42y in only one layer as shown in FIG. .
- FIG. 8 is a diagram showing a region AX in the wiring layer L1 in which a plurality of lead lines 42x are extended and a region AY in the wiring layer L1 in which a plurality of lead lines 42y are extended.
- the area AX is an area including terminal groups 40b to 40c connected to a plurality of coils 41x and a plurality of via conductors 35x.
- Area AY is an area including terminal group 40a connected to multiple coils 41y and multiple via conductors 35y. According to the arrangement of the terminal groups 40a to 40c and the respective plurality of via conductors 35x and 35y according to the present embodiment, such regions AX and AY can be arranged in the wiring layer L1 so as not to cross each other. Therefore, it is possible to wire each of the plurality of lead lines 42x and 42y in only one layer.
- the third feature is that the terminal groups 40a to 40c and the plurality of via conductors 35x are arranged so that the absolute value of the moving average deviation rate of the length of the lead wires 42x and 42y for each of the coils 41x and 41y is equal to or less than a predetermined value. , 35y and the shape of each lead line 42x, 42y.
- the moving average deviation rate DEV(k) of the lead wire 42x of the coil 41x is expressed by the following equation (2).
- DEV(k) (( Lk -AVE(k))/AVE(k)) ⁇ 100 (2)
- the moving average divergence rate of the length of the lead wire 42y for each coil 41y is similarly obtained.
- the terminal groups 40a to 40c and the plurality of via conductors 35x and 35y are arranged so that the absolute value of the moving average rate of deviation obtained in this manner is equal to or less than a predetermined value (at least 30%, preferably 20%).
- a predetermined value at least 30%, preferably 20%.
- FIG. 9A shows, for each coil 41x, the length of the corresponding lead wire 42x (the total length of the two corresponding lead wires 42x) and the moving average deviation rate of the length of the corresponding lead wire 42x. It is a plotted figure.
- FIG. 9B shows, for each coil 41y, the length of the corresponding lead wire 42y (the total length of the two corresponding lead wires 42x) and the moving average deviation rate of the length of the corresponding lead wire 42y. and is plotted.
- These figures show a group of coils referred to for deriving the intensity distribution of the pen signal. An example in the case of a coil is shown.
- the moving average divergence rate is suppressed to 20% or less. Therefore, it can be said that the position of the stylus 2 can be derived correctly by the integrated circuit 20 in the tablet terminal 1 according to the present embodiment.
- FIG. 10 is a diagram showing the configuration of wiring included in the wiring layer L1 according to the comparative example.
- the sensor according to this comparative example includes a plurality of coils 100 each extending in the Y direction, and a plurality of via conductors 101 connected to one end or the other end of each coil 100. be done.
- Each coil 100 has the same shape as each coil 41x shown in FIG. 6 except for the positions of both ends.
- the wiring layer L1 also includes a terminal group 102 including a plurality of internal terminals corresponding to one end or the other end of each coil 100, and via conductors 101 and terminals provided one-to-one with the ends of the coils 100, respectively.
- a plurality of lead lines 103 are formed to connect with corresponding internal terminals in group 102 .
- An actual sensor also has a plurality of coils extending in the X direction, and corresponding via conductors, terminal groups, and lead wirings, but illustration is omitted in FIG.
- the arrangement of the terminal group 102 does not have much freedom due to the restrictions imposed by the position of the opening 10a shown in FIG. As a result, if the via conductors 101 are arranged without considering the above-described moving average deviation rate, two adjacent coils 100 and 100 from the left side of FIG. There are places where the positions of the via conductors 101 are greatly deviated between the coils 100 .
- FIG. 11 is a diagram plotting the length of the corresponding lead wire 103 (the total length of the corresponding two lead wires 103) and the moving average deviation rate of the length of the corresponding lead wire 103 for each coil 100.
- the group of coils 100 referred to for deriving the intensity distribution of the pen signal is three coils including the coil 100 where the maximum value of the received intensity of the pen signal is detected and the coils on both sides thereof. An example in the case of 100 is shown.
- the absolute value of the moving average deviation rate exceeds 30% for the third coil 100 and the fourth coil 100.
- the absolute value of the moving average rate of deviation is a large value exceeding 60%.
- the difference in parasitic resistance among the group of coils 100 used for deriving the intensity distribution of the pen signal is greatly different. Therefore, the position of the stylus 2 cannot be derived correctly.
- the sensor 13 of the present embodiment it is possible to avoid the position where the position of the stylus 2 cannot be derived correctly, and the position of the stylus 2 can be derived by the integrated circuit 20 at any position within the detection area. able to do it right.
- the difference in the length of the lead wires 42x and 42y between the adjacent coils 41x and 41y can be calculated more simply. That is, the terminal groups 40a to 40c and the plurality of via conductors 35x and 35y are arranged so that the absolute value of the difference in the length of the lead wires 42x and 42y between the adjacent coils 41x and 41y is equal to or less than a predetermined value, and , the shapes of the lead lines 42x and 42y may be determined. This also avoids large differences in parasitic resistance among the groups of coils used to derive the intensity distribution of the pen signal, allowing stylus 2 by integrated circuit 20 to be detected at any position within the sensing area. position can be derived correctly.
- each of the lead lines 42x and 42y is arranged in one or more directions that obliquely cross the X direction and the Y direction (specifically, the A direction and the Y direction).
- direction B the coils 41x and 41y are not obliquely formed, and are generated between the lead wires 42x and 42y and the coils 41x and 41y. It becomes possible to reduce magnetic coupling.
- each of the plurality of coils 41x , 41y can be wired in a single layer of only the wiring layer L1.
- the sensor 13 it is possible to avoid a large difference in parasitic resistance between the two adjacent coils 41x and between the two adjacent coils 41y. At any position within the detection area, it is possible for the integrated circuit 20 to correctly derive the position of the stylus 2 .
- FIG. 12 is a diagram showing the configuration of wiring included in wiring layer L1 of sensor 13 according to a modification of the present embodiment.
- a plurality of via conductors 35x connected to one end of each of a plurality of coils 41x are commonly connected by a common connection line 45x, and only one lead line 42x is used for common connection.
- Line 45x is connected to terminal group 40c.
- a plurality of via conductors 35y connected to one end of each of the plurality of coils 41y are commonly connected by a common connection line 45y, and the common connection line 45y is connected to the terminal group 40c by only one lead wire 42y. ing.
- a ground potential may be supplied to one end of each of the plurality of coils 41x and one end of each of the plurality of coils 41y, so the integrated circuit 20 can normally receive the pen signal even in this manner.
- a ground potential may be supplied to the other end of each of the plurality of coils 41x and the other end of each of the plurality of coils 41y. In this case, the other ends of the coils 41x and 41y are It should be connected.
- the common connection lines 45x and 45y along either the A direction or the B direction, except for some exceptions.
- Some exceptions are bent portions and connection portions with via conductors 35x and 35y, as well as lead lines 42x and 42y. By doing so, it is possible to reduce the magnetic coupling that occurs between the common connection lines 45x and 45y and the respective plurality of coils 41x and 41y.
- FIG. 13 is a diagram showing the configuration of wiring included in the wiring layer L1 of the sensor 13 according to the first embodiment.
- the arrangement of terminal groups 40a to 40c and via conductors 35x and 35y and the shape of lead wires 42x and 42y according to the present embodiment are different from those shown in FIG. Almost the same.
- the number of turns of each of the coils 41x and 41y in this embodiment is 6, which increases the number of via conductors arranged at the edge of the detection area compared to FIG. There are many. This number of turns is the same in FIGS. 14 to 17 described later.
- FIG. 14 is a diagram showing the configuration of wiring included in the wiring layer L1 of the sensor 13 according to the second embodiment.
- the via conductors 35x are arranged along one side of the detection region forming the ends in the Y direction
- the via conductors 35y are arranged along one side of the detection region forming the ends in the X direction.
- all of the plurality of internal terminals connected to both ends of each of the plurality of lead wires 42x and 42y are arranged in a straight line to form one terminal group 40a.
- FIG. 15 is a diagram showing the configuration of wiring included in the wiring layer L1 of the sensor 13 according to the third embodiment.
- the via conductors 35x are arranged along one side of the detection region forming the ends in the Y direction
- the via conductors 35y are arranged along one side of the detection region forming the ends in the X direction.
- the positions of the plurality of via conductors 35x and 35y are slightly closer to the inside of the detection area than in the second embodiment.
- a plurality of internal terminals connected to both ends of all of the plurality of lead wires 42x and some of the plurality of lead wires 42y constitute one terminal group 40b.
- One terminal group 40a is composed of a plurality of internal terminals.
- FIG. 16 is a diagram showing the configuration of wiring included in the wiring layer L1 of the sensor 13 according to the fourth embodiment.
- all of the plurality of internal terminals connected to both ends of each of the plurality of lead wires 42x and 42y are arranged in a straight line to form one terminal group.
- the third embodiment is the same as the third embodiment, except that it constitutes 40a and that the shapes of the plurality of lead lines 42x and 42y are slightly different from the third embodiment.
- each of the plurality of lead wires 42x and 42y is connected to the terminal group, bent, and connected to the via conductors 35x and 35y. and B direction.
- the terminal group and the plurality of via conductors 35x and 35y are divided into a region in the wiring layer L1 in which the plurality of lead lines 42x are extended and a region in the wiring layer L1 in which the plurality of lead lines 42y are extended. are arranged so that they do not intersect.
- the terminal group and the plurality of via conductors 35x and 35y are arranged and each The shapes of the lead lines 42x and 42y are determined. Therefore, according to the sensors 13 according to the first to fourth examples, the same effect as the sensor 13 according to the present embodiment described above can be obtained.
- FIG. 17 is a diagram showing the configuration of wiring included in the wiring layer L1 of the sensor 13 according to the fifth embodiment.
- This embodiment differs from the second embodiment in that all of the plurality of internal terminals connected to both ends of each of the plurality of lead wires 42x and 42y are arranged in a straight line to form one terminal group 40a. and so on.
- the arrangement of via conductors 35x and 35y is significantly different from this embodiment and other examples. In particular, some of the plurality of via conductors 35x are located on the opposite side of the rest across the terminal group 40a.
- each of the plurality of lead wires 42x and 42y has a portion extending along either the A direction or the B direction. Therefore, compared to the example shown in FIG. 10, it can be said that it is possible to reduce the magnetic coupling that occurs between the lead wires 42x and 42y and the coils 41x and 41y.
- the terminal group 40a and the plurality of via conductors 35x and 35y are divided into a region in the wiring layer L1 in which the plurality of lead lines 42x are extended and a region in the wiring layer L1 in which the plurality of lead lines 42y are extended. are arranged so that they do not cross each other. Therefore, it is possible to wire the plurality of lead wires 42x and 42y obliquely crossing the plurality of coils 41x and 41y using only one wiring layer L1.
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- Electromagnetism (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
Abstract
Description
AVE(k)=(1/m)×Σ(Lk) ・・・(1)
DEV(k)=((Lk-AVE(k))/AVE(k))×100 ・・・(2)
2 スタイラス
10 表示モジュール背面カバー
10a 開口部
11 シールド板
12 スペーサー
13 センサ
16 表示パネル
17 表示モジュール枠
18 ガラス
20 集積回路
21 折り曲げ基板
30,31 絶縁層
35,35x,35y ビア導体
40a~40c 端子群
41x,41y コイル
42x,42y 引き出し線
45x,45y 共通接続線
50,52 接続部
51 屈曲部
L1~L3 配線層
Claims (9)
- それぞれ長方形の検出領域の一辺に平行な第1の方向に延在する複数の第1のコイル、及び、それぞれ前記第1の方向と直交する第2の方向に延在する複数の第2のコイルを含む複数のコイルと、
前記複数のコイルそれぞれの一端及び他端に対応して設けられる複数の端子と、
前記複数の端子のそれぞれと、対応する前記複数のコイルの一端又は他端とを接続する複数の引き出し線と、を有し、
前記複数の引き出し線はそれぞれ、前記第1及び第2の方向のそれぞれと斜交する1以上の方向のいずれかに沿って延設される、
センサ。 - 前記複数の引き出し線は、対応する前記端子との接続部、屈曲部、及び、対応する前記コイルとの接続部を除き、前記1以上の方向のいずれかに沿って延設される、
請求項1に記載のセンサ。 - 前記複数の引き出し線は、それぞれの少なくとも80%以上の部分で、前記1以上の方向のいずれかに沿って延設される、
請求項1又は2に記載のセンサ。 - 前記1以上の方向は、前記第1の方向と45度の角度をなす第3の方向、及び、前記第3の方向と直交する第4の方向、を含む、
請求項1乃至3のいずれか一項2に記載のセンサ。 - 前記複数の引き出し線は、第1の配線層に形成される配線であり、
前記複数の引き出し線は、前記複数の第1のコイルの一端又は他端とを接続される複数の第1の引き出し線と、前記複数の第2のコイルの一端又は他端とを接続される複数の第2の引き出し線とを含み、
前記複数の第1の引き出し線はそれぞれ、前記第1の配線層内に設けられる第1の接続点で、対応する前記複数の第1のコイルの一端又は他端と電気的に接続され、
前記複数の第2の引き出し線はそれぞれ、前記第1の配線層内に設けられる第2の接続点で、対応する前記複数の第2のコイルの一端又は他端と電気的に接続され、
前記複数の端子、複数の前記第1の接続点、及び、複数の前記第2の接続点は、前記複数の第1の引き出し線が延設される第1の領域と、前記複数の第2の引き出し線が延設される第2の領域とが交差しないように配置される、
請求項1乃至4のいずれか一項に記載のセンサ。 - 前記第1の領域は、前記複数の端子のうち前記複数の第1のコイルに接続される複数の端子、及び、前記複数の第1の接続点を含み、
前記第2の領域は、前記複数の端子のうち前記複数の第2のコイルに接続される複数の端子、及び、前記複数の第2の接続点を含む、
請求項5に記載のセンサ。 - 前記複数の第1のコイルが延設される第2の配線層と、
前記複数の第2のコイルが延設される第3の配線層と、
それぞれ前記複数の第1のコイルの一端又は他端に接続される複数の第1のビア導体と、
それぞれ前記複数の第2のコイルの一端又は他端に接続される複数の第2のビア導体と、を有し、
前記複数の第1の接続点は、前記複数の第1のビア導体と前記第1の配線層との接続点であり、
前記複数の第2の接続点は、前記複数の第2のビア導体と前記第1の配線層との接続点である、
請求項5又は6に記載のセンサ。 - 前記複数の端子、及び、前記複数の引き出し線と前記複数のコイルの接続点の配置、並びに、前記複数の引き出し線それぞれの形状は、前記コイルごとの前記引き出し線の移動平均乖離率の絶対値が所定値以下となるように決定されている、
請求項1乃至4のいずれか一項に記載のセンサ。 - 前記所定値は20%である、
請求項8に記載のセンサ。
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PCT/JP2021/020573 WO2022249495A1 (ja) | 2021-05-28 | 2021-05-28 | センサ |
CN202180056311.8A CN116034333A (zh) | 2021-05-28 | 2021-05-28 | 传感器 |
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JP4405247B2 (ja) * | 2003-11-28 | 2010-01-27 | 株式会社ワコム | 座標入力装置のセンス部 |
US20150220192A1 (en) * | 2014-02-05 | 2015-08-06 | Samsung Display Co., Ltd. | Liquid crystal display device and digitizer module for the same |
WO2019171511A1 (ja) * | 2018-03-07 | 2019-09-12 | 株式会社ワコム | センサ |
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JP4405247B2 (ja) * | 2003-11-28 | 2010-01-27 | 株式会社ワコム | 座標入力装置のセンス部 |
US20150220192A1 (en) * | 2014-02-05 | 2015-08-06 | Samsung Display Co., Ltd. | Liquid crystal display device and digitizer module for the same |
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