WO2022044595A1 - ペンセンサ用カバーフィルム及びペンセンサ - Google Patents

ペンセンサ用カバーフィルム及びペンセンサ Download PDF

Info

Publication number
WO2022044595A1
WO2022044595A1 PCT/JP2021/026440 JP2021026440W WO2022044595A1 WO 2022044595 A1 WO2022044595 A1 WO 2022044595A1 JP 2021026440 W JP2021026440 W JP 2021026440W WO 2022044595 A1 WO2022044595 A1 WO 2022044595A1
Authority
WO
WIPO (PCT)
Prior art keywords
pen
sensor
cover film
signal
electrode
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2021/026440
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
淳 門脇
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wacom Co Ltd
Original Assignee
Wacom Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Wacom Co Ltd filed Critical Wacom Co Ltd
Priority to CN202180022913.1A priority Critical patent/CN115298645B/zh
Priority to DE112021003838.9T priority patent/DE112021003838T5/de
Priority to JP2021564327A priority patent/JP7025606B1/ja
Publication of WO2022044595A1 publication Critical patent/WO2022044595A1/ja
Priority to US18/173,597 priority patent/US11768565B2/en
Anticipated expiration legal-status Critical
Priority to US18/452,453 priority patent/US12073047B2/en
Priority to US18/767,793 priority patent/US12411581B2/en
Ceased legal-status Critical Current

Links

Images

Classifications

    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G06F3/0442—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using active external devices, e.g. active pens, for transmitting changes in electrical potential to be received by the digitiser
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/033—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 two-dimensional [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 OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G06F3/0446—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; 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
    • G06F2203/04114—Touch screens adapted for alternating or simultaneous interaction with active pens and passive pointing devices like fingers or passive pens
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
    • H01B1/02—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of metals or alloys
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
    • H01B1/06—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of other non-metallic substances
    • H01B1/12—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of other non-metallic substances organic substances
    • H01B1/124—Intrinsically conductive polymers
    • H01B1/128—Intrinsically conductive polymers comprising six-membered aromatic rings in the main chain, e.g. polyanilines, polyphenylenes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B5/00—Non-insulated conductors or conductive bodies characterised by their form
    • H01B5/14—Non-insulated conductors or conductive bodies characterised by their form comprising conductive layers or films on insulating-supports

Definitions

  • the present invention relates to a cover film for a pen sensor and a pen sensor.
  • Patent Documents 1 and 2 disclose examples of electronic devices having pen sensors, respectively.
  • Patent Document 1 discloses that the position of the active pen is derived from the distribution of the signal level according to the amount of electric charge induced in each of the plurality of sensor electrodes. Further, Patent Document 2 discloses a configuration in which a plurality of sensor electrodes are simultaneously selected and used for receiving a pen signal.
  • FIG. 8A is a diagram showing an example of the configuration of an electronic device having a pen sensor according to the background technology.
  • the electronic device 100 according to this example has a structure in which the display 101, the sensor electrode group 102, and the cover glass 103 are stacked in this order, and the upper surface of the cover glass 103 constitutes the panel surface 100a. The layers are bonded by an adhesive layer.
  • the display 101 is, for example, a liquid crystal display or an organic EL display.
  • the sensor electrode group 102 is composed of a metal mesh or a substantially transparent linear conductor such as ITO (Indium Tin Oxide).
  • FIG. 8B is a diagram showing another example of the configuration of the electronic device having the pen sensor according to the background technology.
  • the electronic device 110 according to this example has a structure in which the sensor electrode group / display 111 and the cover film 112 are bonded to each other by an adhesive layer, and the upper surface of the cover film 112 constitutes the panel surface 110a.
  • the reason why the cover film 112 is used instead of the cover glass 103 is to realize a so-called "bending display” in addition to lowering the height.
  • the sensor electrode group and display 111 is a device in which a sensor electrode group for detecting an active pen and an electrode group (pixel electrode and common electrode) constituting the display are integrated, and is an in-cell type depending on its specific structure. Or it is called an on-cell type.
  • Patent Document 3 discloses an example of an on-cell type sensor electrode group and display.
  • Patent Documents 4 to 8 and Non-Patent Document 1 disclose examples of a conductive film which is a film-like member having conductivity.
  • Non-Patent Document 2 discloses coating with a conductive resin.
  • Non-Patent Document 3 discloses a technique for molding a conductive plastic having a wide range of conductive and antistatic properties.
  • Patent No. 6537759 Patent No. 5924831 Japanese Unexamined Patent Publication No. 2011-22213 International Publication No. 2018/016442 JP-A-2018-195854 Japanese Unexamined Patent Publication No. 2019-06439 Japanese Unexamined Patent Publication No. 2019-136882 Japanese Unexamined Patent Publication No. 2011-034708
  • FIG. 9 is a diagram showing an equivalent circuit of an electronic device and an active pen related to the background technology.
  • the electronic device 120 shown in the figure includes a sensor electrode group 121, a display 122, and a sensor controller 123.
  • the sensor controller 123 is an integrated circuit that derives the position of the active pen P on the panel surface by receiving the pen signal transmitted by the active pen P via the sensor electrode group 121.
  • FIG. 9 also illustrates the virtual capacitances C pen , C disk, and C sys_GND formed between the parts.
  • the capacitance C pen is the capacitance formed between the active pen P and the sensor electrode group 121
  • the capacitance C disk is the capacitance formed between the sensor electrode group 121 and the display 122.
  • Capacitance C sys_GND is the capacitance formed between the electronic device 120 and the grounding end.
  • the capacitance value of the capacitance C pen is the thickness of the non-conductive material located between the active pen P and the sensor electrode group 121, such as the cover glass 103, the cover film 112, and the adhesive layer shown in FIG.
  • the capacitance C disk increases as the distance between the sensor electrode group 121 and the display 122 decreases, and is a very large value especially when the sensor electrode group and display 111 shown in FIG. 8B is used. become.
  • the cover film 112 as shown in FIG. 8 (b) is generally thinner than the cover glass 103 shown in FIG. 8 (a) and has a small relative permittivity.
  • the shortening of the distance between the active pen P and the sensor electrode group 121 by using the thin cover film 112 is a factor that increases the capacitance C pen , but on the other hand.
  • the ratio of the electrostatic capacity C pen formed between the active pen P and the “peripheral sensor electrode”) is also increased. Further, a small relative permittivity is an element for reducing the capacitance C pen .
  • the display noise flowing into the sensor controller 123 increases, and the S / N ratio of the pen signal deteriorates. As a result of these, the example of FIG. 8B has a problem that it is more difficult to receive the pen signal at the peripheral sensor electrode than the example of FIG. 8A.
  • one of the problems of the present invention is a cover film for a pen sensor that enables the peripheral sensor electrodes to sufficiently receive a pen signal even if a cover film that is thinner than the cover glass and has a small relative permittivity is used.
  • the purpose is to provide a pen sensor.
  • the cover film for a pen sensor is a pen sensor including a plurality of sensor electrodes, and the amount of charge induced in each of the plurality of sensor electrodes by a pen signal transmitted from a pen tip electrode provided at the tip of the pen.
  • a cover film for a pen sensor used together with a sensor controller that detects the position of the pen based on the distribution of the signal level according to the above, so as to cover an effective area for position detection of the pen formed by the plurality of sensor electrodes.
  • a cover film for a pen sensor which is arranged in a pen sensor and contains a conductive resin having a substantially uniform resistance component at least within the range of the effective area.
  • the pen sensor according to the present invention is a pen sensor connected to a sensor controller that detects an active pen that sends a pen signal from a pen tip electrode, and is a plurality of sensor electrodes connected to the sensor controller and the plurality of sensor electrodes, respectively. It is a pen sensor including a cover film which is arranged so as to cover an effective area for position detection of the pen formed by the pen, has conductivity, and has a substantially uniform resistance component at least within the range of the effective area.
  • the cover film for the pen sensor is configured to contain a conductive resin having a substantially uniform resistance component at least within the effective area, it is thinner and has a smaller relative permittivity than the cover glass. Even if a cover film is used, the pen signal can be sufficiently received by the peripheral sensor electrodes.
  • (A) is a diagram showing the configuration of the electronic device 1 according to the embodiment of the present invention, and (b) is the three types of electrode groups 6a, which are included in the sensor electrode group and display 6 shown in (a). It is a schematic diagram which shows the positional relationship of 6b, 6c. It is a figure explaining the principle of the position detection of the active pen P in the electronic device 1. It is a figure explaining the reason why the signal level in the peripheral sensor electrode is lowered by the thickness or the relative permittivity of a cover film 5, and (a) is relative to the thickness DA which the cover film 5 is relatively thick.
  • ( B ) shows a case where the cover film 5 has a relatively thin thickness DB and a case where the cover film 5 has a relatively small relative permittivity ⁇ B. It is a figure explaining the reason that the line cannot be drawn according to a user operation because the thickness of the cover film 5 is small, (a) shows the case where the cover film 5 has a relatively thick thickness DA , (b). ) Shows the case where the cover film 5 has a relatively thin thickness DB . It is a figure which shows the wavy line which may occur in the example of FIG. 4 (b). It is a figure which shows the equivalent circuit of the electronic device 1 and the active pen P.
  • (A) is a schematic diagram showing the distribution of the signal level of the pen signal when the conductivity of the cover film 5 is relatively high
  • (b) is a schematic diagram showing the distribution of the signal level of the pen signal when the conductivity of the cover film 5 is relatively low. It is a schematic diagram which shows the distribution of the signal level of a pen signal.
  • (A) is a diagram showing an example of the configuration of an electronic device having a pen sensor according to the background technology
  • (b) is a diagram showing another example of the configuration of the electronic device having the pen sensor according to the background technology. It is a figure which shows the equivalent circuit of the electronic device and the active pen which concerns on the background technology.
  • the host processor 3 is a processor that controls the entire electronic device 1, and the operation of each part in the electronic device 1 described later is executed under the control of the host processor 3.
  • the sensor controller 2 uses the sensor electrode group (described later) in the pen sensor 4 to derive the position of the indicator such as the active pen P or the user's finger in the panel surface 1a and to receive the data transmitted by the active pen P. It is an integrated circuit that performs.
  • the sensor controller 2 is configured to sequentially output the derived position and the data received from the active pen P to the host processor 3.
  • the host processor 3 generates and draws digital ink based on the position and data thus input.
  • FIG. 1B is a schematic diagram showing the positional relationship between the three types of electrode groups 6a, 6b, and 6c included in the sensor electrode group and display 6.
  • the sensor electrode group and display 6 includes three types of electrode groups 6a, 6b, and 6c stacked in the z direction shown in the figure.
  • the actual sensor electrode group and display 6 includes various members such as a liquid crystal layer in addition to the electrode groups 6a, 6b, and 6c, but the description is omitted in FIG. 1 (b).
  • the electrode group 6a located at the bottom layer is a pixel electrode constituting a TFT liquid crystal display, and has a configuration in which a plurality of island-shaped conductors are arranged in a matrix in the xy direction.
  • the electrode group 6b located in the middle is a common electrode constituting the display, and also constitutes a part of the sensor electrode group, and a plurality of linear conductors extending in the x direction are juxtaposed at equal intervals in the y direction.
  • the electrode group 6c located on the uppermost layer constitutes the rest of the sensor electrode group, and each has a configuration in which a plurality of linear conductors extending in the y direction are juxtaposed at equal intervals in the x direction.
  • each sensor electrode is composed of a metal mesh or a substantially transparent linear conductor such as ITO.
  • the host processor 3 supplies a common potential to each sensor electrode constituting the electrode group 6b, and supplies a potential according to the display content to each of the electrode group 6a. Performs the process of supplying to the island-shaped conductor.
  • the sensor controller 2 uses the electrode groups 6b and 6c to derive the position of the indicator in the panel surface 1a and the active pen P transmits. Receives data.
  • the host processor 3 and the sensor controller 2 sometimes control these. It is configured to be divided.
  • the sensor controller 2 To outline the processing performed by the sensor controller 2 using the electrode groups 6b and 6c, first, regarding the detection of the active pen P, the sensor controller 2 periodically uplinks using one or both of the electrode groups 6b and 6c. Send a signal.
  • the uplink signal is a signal having a role of synchronizing the active pen P with the sensor controller 2 and transmitting a command for controlling the operation of the active pen P.
  • the sensor controller 2 receives the pen signal transmitted by the active pen P in response to the reception of the uplink signal.
  • the pen signal is a signal transmitted from a pen tip electrode provided at the tip of the active pen P, and is a position signal which is an unmodulated carrier signal and a carrier signal modulated by data instructed to be transmitted by a command. It is configured to include a data signal.
  • the reception of the pen signal by the sensor controller 2 is performed by the method (differential method) using the differential amplifier circuit described in Patent Document 2. This has the effect of reducing external noise that may be included in the received pen signal. Further, when receiving the pen signal by the differential method, the sensor controller 2 simultaneously connects a plurality of adjacent sensor electrodes to each of the non-inverting input terminal and the inverting input terminal of the differential amplifier circuit. By doing so, it becomes possible to stabilize the reception result of the pen signal.
  • the sensor controller 2 detects the position of the active pen P on the panel surface 1a based on the distribution of the signal level according to the amount of electric charge induced in each of the sensor electrodes constituting the electrode groups 6b and 6c by the position signal. do. The details of this detection will be described later with reference to FIG. Further, the sensor controller 2 receives and demodulates a data signal using the sensor electrode closest to the detected position among the sensor electrodes constituting the electrode groups 6b and 6c, so that the active pen P transmits the data signal. Receive data.
  • the effective area EA shown in FIG. 1A shows the range in which the position detection of the active pen P by the sensor controller 2 is effectively performed.
  • the sensor controller 2 performs position detection based on the distribution of the signal level according to the amount of charge induced in each of the sensor electrodes, and the pen tip of the active pen P is the electrode group 6b, 6c. Since the sensor electrode does not exist on one side of the pen tip when it is located on the peripheral edge portion, the sensor controller 2 cannot correctly derive the position of the active pen P.
  • the effective area EA is a portion of the plane area where the sensor electrode group and the display 6 are arranged, excluding the area where the sensor controller 2 cannot correctly derive the position of the active pen P for this reason. , Even if a position outside the effective area EA is derived, it is configured not to output to the host processor 3.
  • the sensor controller 2 supplies a finger touch drive signal to the sensor electrodes constituting one of the electrode groups 6b and 6c, and the sensor electrodes constituting the other receive the finger touch drive signal. Is repeatedly executed for each sensor electrode to detect the position of the finger. The detection of the active pen P and the detection of the finger are executed by the sensor controller 2 in a time division during the time when the sensor electrode group and the display 6 are controlled as the sensor electrode group.
  • FIG. 2 is a diagram illustrating the principle of position detection of the active pen P in the electronic device 1.
  • the position detection of the active pen P by the sensor controller 2 will be described in detail with reference to FIG. 2 from the viewpoint of the relationship with the cover film 5.
  • the figure shows the case where the x-coordinate of the active pen P is detected using the electrode group 6c, the same applies to the case where the y-coordinate of the active pen P is detected using the electrode group 6b.
  • the active pen P is configured to include a pen tip electrode 10 provided on the pen tip and an oscillation circuit 11.
  • the oscillation circuit 11 plays a role of transmitting a pen signal from the pen tip electrode 10 by supplying an AC voltage v (t) to the pen tip electrode 10.
  • the sensor electrodes S0 to S4 shown in FIG. 2 are sensor electrodes constituting the electrode group 6c, respectively. Further, the distances D0 to D4 indicate the distances between the pen tip electrodes 10 and the sensor electrodes S0 to S4, and the capacitances C pen0 to C pen4 indicate the distances between the pen tip electrodes 10 and the sensor electrodes S0 to S4, respectively. It shows the capacitance formed between and.
  • the capacitance C disk is a parasitic capacitance formed between each of the sensor electrodes S0 to S4 and the electrode groups 6a and 6b. As shown in the figure, the sensor electrodes S0 to S4 are connected to a common line connected to the sensor controller 2 via switch elements SW0 to SW4, respectively.
  • the sensor controller 2 is configured to be individually connectable to each of the sensor electrodes S0 to S4 via a common line by individually controlling these switch elements SW0 to SW4.
  • the distances D0 to D4 are provided for each of the sensor electrodes S0 to S4.
  • a negative charge is induced according to the inverse number of. More precisely, a negative charge is induced in an amount inversely proportional to the square of the distances D0 to D4.
  • the sensor controller 2 measures the amount of electric charge (or current or voltage) thus induced in each of the sensor electrodes S0 to S4, and outputs the result as a signal at the x coordinate (known position) of each of the sensor electrodes S0 to S4. Get as a level. The same applies to the case where the AC voltage v (t) is negative or 0.
  • the sensor controller 2 approximates the acquired signal level at each x coordinate using a predetermined interpolation function.
  • the coefficient of a predetermined interpolation function is determined so that the sum of squares of the residuals is minimized.
  • a predetermined interpolation function for example, an upwardly convex quadratic function can be preferably used.
  • the sensor controller 2 derives the x-coordinate of the vertex of the interpolation function indicated by the determined coefficient, and acquires the derived x-coordinate as the x-coordinate of the active pen P.
  • the sensor controller 2 can output the x-coordinate of the active pen P with a resolution finer than the width and pitch of the sensor electrodes S0 to S4.
  • the thickness and relative permittivity of the cover film 5 are small, the signal level drops at the sensor electrode (peripheral sensor electrode) located near the sensor electrode (center sensor electrode) located directly below the pen tip electrode 10. , There is a risk that the position of the active pen P cannot be derived correctly. Further, if the thickness of the cover film 5 is small, it may not be possible to draw a line as operated by the user. Each of them will be described in detail below.
  • FIG. 3 is a diagram illustrating the reason why the signal level in the peripheral sensor electrode is lowered due to the small thickness and relative permittivity of the cover film 5.
  • FIG. 3A shows a case where the cover film 5 has a relatively thick thickness DA and a relatively large relative permittivity ⁇ A
  • FIG. 3B shows a case where the cover film 5 has a relatively large relative dielectric constant ⁇ A. The case where it has a thin thickness DB and a relatively small relative permittivity ⁇ B is shown.
  • the coordinate x 0 shown in FIG. 3 indicates the position of the central sensor electrode, and the coordinate x 1 indicates the position of the peripheral sensor electrode.
  • the angles ⁇ A and ⁇ B indicate the angles formed by the line connecting the lower end of the pen tip electrode 10 and the positions of the center sensor electrode and the peripheral sensor electrodes in the example of FIGS. 3 (a) and 3 (b), respectively.
  • Capacities CA0 and CB0 indicate the capacitances formed between the pen tip electrode 10 and the center sensor electrode in the example of FIGS. 3A and 3B, respectively, and the capacitances CA1 and CB1 are shown. Each shows the electrostatic capacitance formed between the pen tip electrode 10 and the peripheral sensor electrode in the example of FIGS. 3 (a) and 3 (b).
  • the specific values of the capacitances CA0, CA1, C B0, and C B1 are expressed by the following equations (1) to (4).
  • the area S is the area of the conductor constituting each capacitance (common to each capacitance).
  • the ratio CA1 / CA0 of the capacitance CA0 and the capacitance CA1 is cos ⁇ A.
  • the ratio C B1 / C B0 of the capacitance C B0 and the capacitance C B1 is cos ⁇ B.
  • C B1 / C B0 is smaller than CA1 / CA0 . Therefore, in the example of FIG. 3B, the signal level of the peripheral sensor electrodes is relatively lower than that of the example of FIG. 3A when compared with the signal level of the central sensor electrode.
  • the fact that ⁇ B ⁇ A is a factor that lowers the signal level as a whole in the example of FIG. 3 (b).
  • the use of the sensor electrode group and display 6 is also a factor that lowers the signal level as a whole. This is because when the sensor electrode group and display 6 are used, the capacitance C disk is compared with the case where the sensor electrode group and the display are prepared as separate devices as in the example shown in FIG. 8 (a), for example. This is because (see FIG. 2) becomes large, and as a result, the display noise flowing into the sensor controller 2 becomes large, and the S / N ratio of the pen signal deteriorates.
  • FIG. 4 is a diagram illustrating the reason why the line as operated by the user cannot be drawn due to the small thickness of the cover film 5.
  • FIG. 4A shows a case where the cover film 5 has a relatively thick thickness DA
  • FIG. 4B shows a case where the cover film 5 has a relatively thin thickness DB.
  • the difference from y0 means that the distribution of the signal level in the x direction and the distribution of the signal level in the y direction are different. Even if the distribution of the signal level in the x direction and the distribution of the signal level in the y direction are different, there is no particular problem if the difference is small, but if the difference is large, it is difficult to draw a line as operated by the user. become.
  • the difference between the distance between the pen tip electrode 10 and the electrode group 6c and the distance between the pen tip electrode 10 and the electrode group 6b is the thickness D of the cover film 5.
  • the smaller the value the larger the value.
  • the difference between the distribution and the distribution of the signal level in the y direction becomes large. Then, as described above, it becomes difficult to draw the line as operated by the user.
  • the sheet resistance value (surface resistance value) of the resistance component of the cover film 5 should be set within an appropriate range.
  • the sheet resistance value is a value obtained by dividing the resistivity of the cover film 5 by its thickness. Therefore, setting the sheet resistance value within an appropriate range means that the resistance value per area of the cover film 5 is set within a constant range regardless of the thickness. By doing so, it becomes possible to diffuse the pen signal to the electrode groups 6b and 6c superimposed on the lower side in the same manner regardless of whether the thickness of the cover film 5 is large or small.
  • the material (conductive resin) of the cover film 5 having such a sheet resistance value specifically, a conductive material composed of at least one of polyethylene dioxythiophene / polystyrene sulfonate (PEDOT / PSS) and polyaniline. It is preferable to use a material containing a sex polymer, and it is further preferable to use a material containing a metal material composed of at least one of indium, gallium and tin.
  • the film-like member 5a may be formed of the conductive film described in any of Patent Documents 4 to 8 and Non-Patent Document 1 described above.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Position Input By Displaying (AREA)
PCT/JP2021/026440 2020-08-25 2021-07-14 ペンセンサ用カバーフィルム及びペンセンサ Ceased WO2022044595A1 (ja)

Priority Applications (6)

Application Number Priority Date Filing Date Title
CN202180022913.1A CN115298645B (zh) 2020-08-25 2021-07-14 笔传感器用覆盖膜及笔传感器
DE112021003838.9T DE112021003838T5 (de) 2020-08-25 2021-07-14 Deckfilm für stiftsensor und stiftsensor
JP2021564327A JP7025606B1 (ja) 2020-08-25 2021-07-14 ペンセンサ用カバーフィルム、ペンセンサ、及び電子機器
US18/173,597 US11768565B2 (en) 2020-08-25 2023-02-23 Cover film for pen sensor and pen sensor
US18/452,453 US12073047B2 (en) 2020-08-25 2023-08-18 Cover film for pen sensor and pen sensor
US18/767,793 US12411581B2 (en) 2020-08-25 2024-07-09 Cover film for pen sensor and pen sensor

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2020141554 2020-08-25
JP2020-141554 2020-08-25

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US18/173,597 Continuation US11768565B2 (en) 2020-08-25 2023-02-23 Cover film for pen sensor and pen sensor

Publications (1)

Publication Number Publication Date
WO2022044595A1 true WO2022044595A1 (ja) 2022-03-03

Family

ID=80354940

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2021/026440 Ceased WO2022044595A1 (ja) 2020-08-25 2021-07-14 ペンセンサ用カバーフィルム及びペンセンサ

Country Status (5)

Country Link
US (3) US11768565B2 (https=)
JP (1) JP7025606B1 (https=)
CN (1) CN115298645B (https=)
DE (1) DE112021003838T5 (https=)
WO (1) WO2022044595A1 (https=)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20250060850A1 (en) * 2023-08-16 2025-02-20 Wacom Co., Ltd. Pen sensor

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US12537289B2 (en) * 2023-05-18 2026-01-27 Microsoft Technology Licensing, Llc Thin film capacitance sensor for proximity detection

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012068893A (ja) * 2010-09-24 2012-04-05 Hitachi Displays Ltd 表示装置
JP2015052861A (ja) * 2013-09-06 2015-03-19 三菱鉛筆株式会社 タッチパネル用フィルム
WO2016186191A1 (ja) * 2015-05-21 2016-11-24 株式会社ワコム アクティブスタイラス

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5924831B2 (ja) 1981-11-20 1984-06-12 株式会社貝印刃物開発センター カツタ−ナイフ刃
JP5405935B2 (ja) 2009-07-30 2014-02-05 日立マクセル株式会社 透明導電性シート
KR20110112128A (ko) 2010-04-06 2011-10-12 삼성전자주식회사 터치 패널의 기생 커패시턴스 보상 방법 및 장치
JP5468525B2 (ja) * 2010-11-18 2014-04-09 第一工業製薬株式会社 半導電性樹脂組成物
JP6100588B2 (ja) * 2012-04-27 2017-03-22 三菱鉛筆株式会社 タッチパネル用フィルム、及びそのフィルムと共に用いるスタイラスペン
KR20140136334A (ko) * 2013-05-20 2014-11-28 박철 정전식 터치패널을 갖는 개인휴대단말기용 기능성 필름
JP6481612B2 (ja) 2013-06-13 2019-03-13 住友ベークライト株式会社 電磁波シールド用フィルム、および電子部品搭載基板
JP5924831B1 (ja) 2015-01-06 2016-05-25 株式会社ワコム 位置検出装置
JP6922913B2 (ja) 2016-07-20 2021-08-18 日本ゼオン株式会社 導電性フィルム及びその製造方法
JP7126841B2 (ja) 2017-09-29 2022-08-29 大日本印刷株式会社 透明両面導電性カバーテープと帯電防止層用樹脂組成物
WO2019097565A1 (ja) 2017-11-14 2019-05-23 株式会社ワコム センサコントローラ
JP7040076B2 (ja) 2018-02-07 2022-03-23 凸版印刷株式会社 透明ガスバリア積層体及びその製造方法、並びにデバイス
EP3789855A1 (en) * 2019-09-05 2021-03-10 Microsoft Technology Licensing, LLC Stylus nib design and accuracy improvement
JP7565936B2 (ja) * 2020-03-19 2024-10-11 日東電工株式会社 光透過性導電膜および透明導電性フィルム

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012068893A (ja) * 2010-09-24 2012-04-05 Hitachi Displays Ltd 表示装置
JP2015052861A (ja) * 2013-09-06 2015-03-19 三菱鉛筆株式会社 タッチパネル用フィルム
WO2016186191A1 (ja) * 2015-05-21 2016-11-24 株式会社ワコム アクティブスタイラス

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20250060850A1 (en) * 2023-08-16 2025-02-20 Wacom Co., Ltd. Pen sensor
US12498830B2 (en) * 2023-08-16 2025-12-16 Wacom Co., Ltd. Pen sensor

Also Published As

Publication number Publication date
US12073047B2 (en) 2024-08-27
US12411581B2 (en) 2025-09-09
CN115298645A (zh) 2022-11-04
US20230400949A1 (en) 2023-12-14
DE112021003838T5 (de) 2023-05-04
US20230195266A1 (en) 2023-06-22
JP7025606B1 (ja) 2022-02-24
US20240361868A1 (en) 2024-10-31
CN115298645B (zh) 2023-06-09
US11768565B2 (en) 2023-09-26
JPWO2022044595A1 (https=) 2022-03-03

Similar Documents

Publication Publication Date Title
US8537125B2 (en) Electrostatic capacity touch panel having a plurality of first, second and third electrodes
US20230393676A1 (en) Stylus nib design and accuracy improvement
US9639179B2 (en) Force-sensitive input device
US20180059823A1 (en) Mutual capacitive force sensor and touch display device with force sensing function and force sensing method thereof
US10282044B2 (en) Touch sensing device and display device with a switching unit configured to receive noise from an electrode
US20100231530A1 (en) Touch pad for multiple sensing
CN104731430B (zh) 触摸传感器装置及电子设备
US20100289774A1 (en) Capacitive Touch Sensing Structure and Sensing Method Thereof
US20100073325A1 (en) Device and method for detecting position of object and image display system having such device
US12411581B2 (en) Cover film for pen sensor and pen sensor
US20140098030A1 (en) Touch module
KR20180023789A (ko) 터치 입력 장치
JP2009258888A (ja) 入力装置、及びそれを備えた表示装置
US20100231531A1 (en) Touch panel device
TWI534690B (zh) 電容式觸控面板裝置
KR102352181B1 (ko) 터치 패널 및 이를 이용한 터치 패널의 구동 방법
KR20050019799A (ko) 접촉 센서
CN112346582B (zh) 一种触控笔以及电子设备
KR20180026433A (ko) 터치 입력 장치
US12498830B2 (en) Pen sensor
JP6368183B2 (ja) タッチパネル
US20160224149A1 (en) Touch sensor
KR20180023379A (ko) 터치 입력 장치

Legal Events

Date Code Title Description
ENP Entry into the national phase

Ref document number: 2021564327

Country of ref document: JP

Kind code of ref document: A

121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 21861024

Country of ref document: EP

Kind code of ref document: A1

122 Ep: pct application non-entry in european phase

Ref document number: 21861024

Country of ref document: EP

Kind code of ref document: A1