WO2014208225A1 - 押圧検出機能付タッチパネル - Google Patents
押圧検出機能付タッチパネル Download PDFInfo
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- WO2014208225A1 WO2014208225A1 PCT/JP2014/063551 JP2014063551W WO2014208225A1 WO 2014208225 A1 WO2014208225 A1 WO 2014208225A1 JP 2014063551 W JP2014063551 W JP 2014063551W WO 2014208225 A1 WO2014208225 A1 WO 2014208225A1
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- Prior art keywords
- electrode
- touch panel
- insertion member
- detection function
- charge
- Prior art date
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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
- 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; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
- G06F3/0445—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
- G06F3/0447—Position sensing using the local deformation of sensor cells
Definitions
- the present invention relates to a touch panel with a press detection function.
- notebook computers equipped with a touchpad are known.
- Such a notebook personal computer has a user-friendly UI that allows the user to freely operate the cursor on the screen simply by tracing the operation surface of the notebook personal computer with a finger when moving the cursor.
- electronic devices equipped with a touch panel are widely used in mobile phones, smartphones, game machines, and the like.
- Such an electronic device has a configuration in which a transparent touch panel is arranged on a display panel such as an LCD, and can be operated simply by touching a button displayed on the display panel with a finger or a stylus.
- the electronic device has a UI that allows intuitive input.
- Patent Document 1 discloses a transparent piezoelectric sensor including a transparent pressure-sensitive layer and a transparent conductive layer.
- Patent Document 1 since the piezoelectric sensor of Patent Document 1 is composed of a plurality of transparent pressure-sensitive layers, the position detection can be performed to some extent, but the position detection accuracy is poor. In Patent Document 1, it is possible to improve the position detection accuracy by reducing the area of the transparent pressure-sensitive layer and increasing the number thereof, but it is difficult to detect a large number of sensor signals. Realistically impossible.
- the present invention eliminates the above-described problems, and an object of the present invention is to provide a touch panel with a pressure detection function capable of highly accurate position detection and pressure detection.
- the present invention is configured as follows.
- the touch panel with press detection function of the present invention is A touch panel with a pressure detection function capable of detecting a pressure load input to the pressure surface, In order from the pressing surface, An upper electrode, an upper insertion member, a middle electrode, a lower insertion member, and a lower electrode are arranged, Any of the upper electrode, the middle electrode and the lower electrode is When an input is made to the touch panel with a pressure detection function, a capacitance detection electrode that detects a pressed position and a charge measurement detection electrode that detects a charge corresponding to the pressure, One of the upper insertion member and the lower insertion member is a touch panel with a pressure detection function, in which one is an insulator and the other is a piezoelectric body.
- the middle electrode may include the charge measuring electrode.
- the upper electrode may include the capacitance detection electrode.
- the upper electrode may include the capacitance detection electrode
- the lower electrode may include a reference potential electrode fixed at a constant potential
- the upper electrode includes one capacitance detection electrode
- the middle electrode includes another capacitance detection electrode
- the lower electrode is fixed at a constant potential.
- a reference potential electrode may be provided.
- the upper insertion member is an insulator
- the lower insertion member is a piezoelectric body
- the upper electrode includes one capacitance detection electrode
- the lower electrode is another The electrostatic capacitance detection electrode may be provided.
- the upper insertion member may be a piezoelectric body
- the lower insertion member may be an insulator
- the upper electrode or the middle electrode may include the charge measuring electrode
- the upper insertion member is an insulator
- the lower insertion member is a piezoelectric body
- at least one of the upper electrode and the middle electrode includes a capacitance detection electrode.
- the lower electrode may include the charge measuring electrode.
- the upper insertion member is an insulator
- the lower insertion member is a piezoelectric body
- at least one of the upper electrode and the middle electrode includes a capacitance detection electrode.
- the middle electrode may be a reference potential electrode
- the lower electrode may include the charge measuring electrode.
- an adhesive layer may be disposed between the middle electrode and the lower insertion member.
- an adhesive layer may be disposed between the upper insertion member and the middle electrode.
- the adhesive layer may be disposed in the following space. (1) Space formed by the upper insertion member and the upper insertion member (2) Space formed by the upper insertion member and the middle electrode (3) Formed by the lower insertion member and the lower electrode space
- a support member may be disposed on the upper surface of the upper electrode.
- the support member may be a protective member.
- a display member may be provided below the touch panel with a press detection function, and the touch panel with a press detection function may be transparent.
- the touch panel with a pressure detection function can perform position detection and pressure detection with high accuracy when a pressure is applied to the touch panel.
- FIG. 1 is a cross-sectional view of a touch panel with a press detection function.
- the touch panel 1 includes an upper electrode 10, a middle electrode 20, a lower electrode 30, an upper insertion member 40, and a lower insertion member 50.
- the members are arranged in the order of the upper electrode 10, the upper insertion member 40, the middle electrode 20, the lower insertion member 50, and the lower electrode 30 from the pressing surface of the touch panel 1.
- the configuration of the touch detection function-equipped touch panel 1 will be described in detail.
- the electrode which comprises the touch panel 1 consists of the upper electrode 10, the middle part electrode 20, and the lower electrode 30.
- the upper electrode 10, the middle electrode 20, and the lower electrode 30 are either a capacitance detection electrode, a charge measurement detection electrode, a reference potential electrode, or a combination of these electrodes.
- the capacitance detection electrodes are pressed from the change in capacitance that occurs between the capacitance detection electrodes when the pressing means M comes into contact with the touch panel 1 when the pressing means M presses the touch panel 1.
- the charge measuring electrode is an electrode that detects charges generated when the touch panel 1 is pressed.
- the reference potential electrode is an electrode whose potential is always constant.
- the pressing means M refers to a device that applies pressure to the touch panel 1, such as a finger or a stylus pen.
- the upper electrode 10, the middle electrode 20, and the lower electrode 30 can be made of a conductive material.
- the conductive material include transparent conductive oxides such as indium-tin oxide (ITO), tin-zinc oxide (Tin), polyethylene dioxythiophene A conductive polymer such as (Polyethylenedioxythiophene, PEDOT) can be used.
- the electrode can be formed by using vapor deposition or screen printing.
- a conductive metal such as copper or silver may be used as the conductive material.
- the electrode may be formed by vapor deposition, or may be formed using a metal paste such as a copper paste or a silver paste.
- a conductive material a material in which conductive materials such as carbon nanotubes, metal particles, and metal nanofibers are dispersed in a binder may be used.
- Insertion member The insertion member which comprises the touch panel 1 consists of the upper insertion member 40 and the lower insertion member 50.
- the upper insertion member 40 and the lower insertion member 50 are made of a piezoelectric body or an insulator. Specifically, when the upper insertion member 40 is made of a piezoelectric material, the lower insertion member 50 is made of an insulator, and when the upper insertion member is made of 40 insulation, the lower insertion member 50 is made of a piezoelectric material. Composed.
- Piezoelectric material examples include inorganic piezoelectric materials and organic piezoelectric materials.
- inorganic piezoelectric materials include barium titanate, lead titanate, lead zirconate titanate, potassium niobate, lithium niobate, and lithium tantalate.
- Examples of the organic piezoelectric material include a fluoride polymer or a copolymer thereof, and a polymer material having chirality.
- Examples of the fluoride polymer or a copolymer thereof include polyvinylidene fluoride, vinylidene fluoride-tetrafluoroethylene copolymer, and vinylidene fluoride-trifluoroethylene copolymer.
- Examples of the polymer material having chirality include L-type polylactic acid and R-type polylactic acid.
- Insulator examples of the material constituting the insulator include organic materials, inorganic materials, and organic-inorganic hybrid materials.
- examples of the organic material include acrylic, polycarbonate, polyethylene terephthalate, and cycloolefin polymer. A glass plate etc. are mentioned as an inorganic material.
- examples of the organic-inorganic hybrid material include a material in which glass fiber is contained in a resin.
- the touch detection function-equipped touch panel 1 of the present invention includes a capacitance detection electrode, a charge measurement electrode, and a piezoelectric body. Accordingly, when a pressure is applied to the touch panel 1, the pressure position is detected by the capacitance detection electrode, and the charge generated by the pressure is detected by the charge measuring electrode, whereby the pressure position and the pressure load applied to the touch panel 1 are detected. Can be detected.
- FIG. 2 is a cross-sectional view of a touch panel with a press detection function.
- the basic structure of the touch panel 1 of 2nd Embodiment is the same as 1st Embodiment, the characteristic point to 2nd Embodiment is demonstrated below.
- the touch panel 1 of the second embodiment is characterized in that the middle electrode 20 includes a charge measuring electrode S.
- the charge measuring electrode S is sandwiched between the upper electrode 10 and the lower electrode 30. Therefore, the charge measuring electrode S is protected from noise (electromagnetic noise and static electricity, particularly electromagnetic noise and static electricity from the input means) around the touch panel 1 by the upper electrode 10 and the lower electrode 30.
- FIG. 3 is an exploded perspective view of the touch detection function-equipped touch panel 1 according to the first specific example.
- the touch panel 1 of the first specific example includes an upper electrode 10, a middle electrode 20, a lower electrode 30, an upper insertion member 40, and a lower insertion member 50.
- the upper electrode 10 has a strip-shaped electrostatic capacitance detection electrodes C x to be arrayed in the X-axis direction.
- Central electrode 20 has a strip-shaped electrostatic capacitance detection electrodes C y are arrayed in the Y-axis direction.
- the upper electrode 10 includes an electrostatic capacitance detecting electrodes C x, by central electrode 20 is provided with a capacitance detecting electrode C y, when the pressing is applied to the touch panel 1, the electrostatic capacitance detecting electrodes It has become possible to detect the input position by measuring a change in capacitance at each intersection of C x and the electrostatic capacitance detecting electrodes C y.
- central electrodes 20 is provided with an electrostatic capacitance detecting electrodes C y between strip-shaped charge measuring electrode S to be arranged in (the electrostatic capacitance detecting electrodes C y are places which are not located).
- the lower electrode 30 is composed of a flat reference potential electrode G
- the lower insertion member 50 disposed between the middle electrode 20 and the lower electrode 30 is composed of a piezoelectric body P. As described above, by arranging the piezoelectric body P between the charge measuring electrode S and the reference potential electrode G, the charge measuring electrode S detects charges generated in the piezoelectric body P when a pressure is applied. It becomes possible. Therefore, when a pressure is applied to the touch panel 1, a pressing load can be detected.
- the charge measurement electrode S is disposed between the capacitance detection electrode Cx and the reference potential electrode G. Therefore, the charge measuring electrode S is protected from noise (electromagnetic noise and static electricity, particularly electromagnetic noise and static electricity from the input means) around the touch panel 1 by the capacitance detection electrode Cx and the reference potential electrode G. The As a result, the touch panel 1 can accurately measure the pressing load when the pressure is applied.
- noise electromagnetic noise and static electricity, particularly electromagnetic noise and static electricity from the input means
- an amplifier may be connected to the charge measuring electrode S.
- the charge signal of the charge can be detected by the amplifier even when the charge is small.
- the touch panel 1 may include a protective member made of glass or plastic on the upper electrode 10.
- the electrostatic capacitance detecting electrodes C x constituting the upper electrode 10 may be disposed on the lower surface of the protective member.
- a display member made of liquid crystal or organic EL may be disposed under the lower electrode 30 of the touch panel 1.
- the electrostatic capacitance detecting electrodes C x to be arranged in the X-axis direction is arranged on the upper electrode 10
- the electrostatic capacitance detecting electrodes C y which is arranged in the Y-axis direction in the middle electrode 20 is disposed has been described
- the electrostatic capacitance detecting electrodes C y are arranged in the upper electrode 10 may be disposed electrostatic capacitance detection electrode C x Chubu electrode 20.
- the charge measurement electrode S 1 may be disposed between the capacitance detection electrodes C x (locations where the capacitance detection electrodes C x are not disposed).
- the reference potential electrode G may be partial or patterned as long as the reference potential electrode G is configured to overlap the charge measuring electrode S via the piezoelectric body P.
- FIG. 4 is an exploded perspective view of the touch panel 1 according to the second specific example.
- the touch panel 1 of the second specific example includes an upper electrode 10, a middle electrode 20, a lower electrode 30, an upper insertion member 40, and a lower insertion member 50.
- the upper electrode 10 is made of a strip-shaped electrostatic capacitance detection electrodes C x to be arrayed in the X-axis direction.
- the middle electrode 20 is formed of a strip-shaped charge measuring electrode arranged in a plurality at intervals in the Y-axis direction.
- the lower electrode 30 is made of a strip-shaped electrostatic capacitance detection electrodes C y are arrayed in the Y-axis direction.
- the upper insertion member 40 is made of an insulator I, and the lower insertion member 50 is made of a piezoelectric body P.
- the charge measuring electrode S between the electrostatic capacitance detecting electrodes C x and the electrostatic capacitance detecting electrodes C y is disposed.
- charge measuring electrode S is arranged at a distance, it is possible to capacitive coupling between the electrostatic capacitance detecting electrodes C x and the electrostatic capacitance detecting electrodes C y.
- the intersection between the electrostatic capacitance detecting electrodes C x and the electrostatic capacitance detecting electrodes C y when the human and the touch panel in contact, by measuring the change in capacitance caused by the contact, applied pressed It is possible to detect the pressed position.
- the capacitance detection electrode Cy also serves as the reference potential electrode G.
- the electrostatic capacitance detecting electrodes C y also serves as a reference potential electrode G, the generated electric charges in the piezoelectric P can be detected by the charge measurement electrodes S when the pressing is applied. Therefore, when a pressure is applied, it is possible to detect a pressure load.
- the charge measuring electrode S is disposed between the electrostatic capacitance detecting electrodes C x and the electrostatic capacitance detecting electrodes C y. Therefore, the charge measuring electrode S is, the electrostatic capacitance detecting electrodes C x and the electrostatic capacitance detecting electrodes C y, from the noise (electromagnetic noise and static electricity, in particular electromagnetic noise and static electricity from the input means) in the periphery of the touch panel Protected. As a result, the touch panel 1 can accurately measure the pressing load when the pressure is applied.
- an amplifier may be connected to the charge measuring electrode.
- the signal of the charge can be detected by the amplifier even when the charge is small.
- the touch panel 1 may include a protective member made of glass or plastic on the upper electrode 10.
- the electrostatic capacitance detecting electrodes C x constituting the upper electrode 10 may be disposed on the lower surface of the protective member.
- a display member made of liquid crystal or organic EL may be disposed under the lower electrode 30 of the touch panel 1.
- the electrostatic capacitance detecting electrodes C x to be arranged in the X-axis direction is arranged on the upper electrode 10
- the electrostatic capacitance detecting electrodes C y which is arranged in the Y-axis direction in the middle electrode 20 is disposed has been described
- the electrostatic capacitance detecting electrodes C y are arranged in the upper electrode 10 may be disposed electrostatic capacitance detection electrode C x Chubu electrode 20.
- FIG. 5 is an exploded perspective view of the touch detection function-equipped touch panel according to the third specific example.
- FIG. 6 is a plan view of the upper electrode.
- the touch detection function-equipped touch panel 1 according to the third specific example includes an upper electrode 10, a middle electrode 20, a lower electrode 30, an upper insertion member 40, and a lower insertion member 50.
- the upper electrode 10 is provided with a strip-shaped electrostatic capacitance detection electrodes C x to be arrayed in the X-axis direction, the strip-shaped electrostatic capacitance detection electrodes C y are arrayed in the Y-axis direction.
- the electrostatic capacitance detecting electrodes Cx, the electrostatic capacitance detecting electrodes C y are arranged on substantially the same plane.
- the insulating material 60 is sandwiched, and the electrostatic capacitance detecting electrodes C x, electrostatic capacitance detecting electrodes C y are electrically It is in an insulated state.
- the electrostatic capacitance detection electrode C x and the electrostatic capacitance detecting electrodes C y are arranged, when the pressing is applied, the electrostatic capacitance detecting electrodes intersection of C x and the electrostatic capacitance detecting electrodes C y It is possible to detect the pressed position by measuring the change in the electrostatic capacity.
- the middle electrode 20 is composed of a flat plate-shaped charge measuring electrode S
- the lower electrode 30 is composed of a flat plate-like reference potential electrode G.
- the lower insertion member 50 disposed between the middle electrode 20 and the lower electrode 30 is made of a piezoelectric body P.
- the charge measuring electrode S detects charges generated in the piezoelectric body P when the touch panel 1 is pressed. It becomes possible to do. Accordingly, the pressing amount can be detected.
- the charge measurement electrode S is disposed between the capacitance detection electrode C x , the capacitance detection electrode C y , and the reference potential electrode G. Therefore, the charge measuring electrode S is connected to noise (electromagnetic wave noise or static electricity, particularly from the input means) around the touch panel 1 by the capacitance detection electrode C x , the capacitance detection electrode Cy, and the reference potential electrode G. It is protected from electromagnetic noise and static electricity). As a result, the touch panel 1 can accurately measure the pressing load when the pressure is applied.
- noise electromagnetic wave noise or static electricity, particularly from the input means
- an amplifier may be connected to the charge measuring electrode S.
- the signal of the charge can be detected by the amplifier even when the charge is small.
- the touch panel 1 may include a protective member made of glass or plastic on the upper electrode 10.
- the capacitance detection electrode C x , the capacitance detection electrode C y , and the insulating member 60 constituting the upper electrode 10 may be arranged on the lower surface of the protection member B.
- a display member made of liquid crystal or organic EL may be disposed under the lower electrode 30 of the touch panel 1.
- the charge measuring electrode S and the reference potential electrode G are plate-shaped.
- the charge measuring electrode S and the reference potential electrode G may be disposed so as to overlap with each other via the piezoelectric body P.
- it may be partial or patterned.
- FIG. 8 shows another specific example of the touch detection function-equipped touch panel 1 according to the second embodiment.
- the upper insertion member 40 includes the insulator I
- the lower insertion member 50 includes the piezoelectric body P.
- the upper electrode 10 is provided with an electrostatic capacitance detecting electrodes C y arranged in the electrostatic capacitance detecting electrodes C x and Y-axis direction that is arranged in the X-axis direction.
- the middle electrode 20 includes a charge measuring electrode S
- the lower electrode 30 includes a reference potential electrode G.
- Specific examples A2 to A11 are as shown in FIG.
- the specific examples A1 to A11 are common in that the middle electrode 20 includes the charge measuring electrode S.
- the charge measuring electrode S is sandwiched between the upper electrode 10 and the lower electrode 30, so that when the touch panel 1 is pressed, the pressing load of the pressing can be accurately measured. It has become.
- the upper electrode 10 is preferably configured electrostatic capacitance detecting electrodes C x or the electrostatic capacitance detecting electrodes C y,.
- the upper electrode 10 is composed electrostatic capacitance detecting electrodes C x or the electrostatic capacitance detecting electrodes C y, when pressing the touch panel with the pressing detection function, pressing means and the electrostatic capacitance detecting electrodes C x, C y And the distance will be closer.
- a change in capacitance between the capacitance detection electrodes C x and C y caused by the contact increases, and the accuracy of position detection is improved.
- FIG. 9 is a cross-sectional view of a touch panel with a press detection function.
- FIG. 10 is a diagram illustrating a specific example of the third embodiment. Since the basic configuration of the touch panel of the third embodiment is the same as that of the first embodiment, the following will describe features that are characteristic of the third embodiment.
- the upper insertion member 40 is a piezoelectric body P
- the lower insertion member 50 is an insulator I
- the upper electrode 10 is an insulator I
- One of the 20 electrodes is a charge measuring electrode S.
- the piezoelectric body P is disposed in the vicinity of the pressing means M when the touch panel 1 is pressed. As a result, since the piezoelectric body P is easily subjected to a pressing force from the pressing means M, the detection sensitivity of the pressure applied to the touch panel 1 is improved.
- FIG. B1 to B11 other arrangement methods of the capacitance detection electrode C x , the capacitance detection electrode C y , the charge measurement electrode S, and the reference potential electrode G are shown in FIG. B1 to B11.
- FIG. 11 is a cross-sectional view of a touch panel with a press detection function. Since the basic configuration of the touch panel of the fourth embodiment is the same as that of the first embodiment, the following will describe features that are characteristic of the fourth embodiment.
- the upper insertion member 40 is an insulator I
- the lower insertion member 50 is a piezoelectric body P
- the lower electrode 30 is a charge measurement.
- the charge measuring electrode S of the touch panel 1 the capacitance detecting electrode C x to be arranged in the X-axis direction since it is located on the lowermost surface of the touch panel 1 are arranged in the Y-axis direction It is not disposed between the capacitance detection electrodes Cy .
- the touch panel 1 can accurately measure the pressing position when the pressure is applied.
- the specific example of the touch panel with a press detection function of 4th Embodiment is demonstrated.
- FIG. 12 is an exploded perspective view of the touch detection function-equipped touch panel according to the first specific example.
- the touch detection function-equipped touch panel 1 according to the first specific example includes an upper electrode 10, a middle electrode 20, a lower electrode 30, an upper insertion member 40, and a lower insertion member 50.
- the upper electrode 10 is provided with a strip-shaped electrostatic capacitance detection electrodes C x which is more disposed in the X-axis direction, the electrostatic capacitance detecting electrodes C y which is more disposed in the Y-axis direction.
- the capacitance detection electrode Cx and the capacitance detection electrode Cy are arranged on substantially the same plane.
- the insulating material 60 is sandwiched, and the electrostatic capacitance detecting electrodes C x, electrostatic capacitance detecting electrodes C y are electrically It is in an insulated state.
- the electrostatic capacitance detection electrode C x and the electrostatic capacitance detecting electrodes C y are arranged, when the pressing is applied, the electrostatic capacitance detecting electrodes intersection of C x and the electrostatic capacitance detecting electrodes C y By measuring the change in capacitance at, accurate press position detection is possible.
- the middle electrode 20 is provided with a flat reference potential electrode G
- the lower electrode 30 is provided with a flat charge measuring electrode S and is sandwiched between the middle electrode 20 and the lower electrode 30.
- the lower insertion member 50 includes a piezoelectric body P.
- the touch panel 1 detects the charge generated in the piezoelectric body P when the pressure is applied by the charge measurement electrode S. It is possible to do. Therefore, the touch panel 1 can detect the pressing load when the pressing is applied.
- an amplifier may be connected to the charge measuring electrode S.
- the signal of the charge can be detected by the amplifier even when the charge is small.
- the charge measurement electrode S is disposed apart from the capacitance detecting electrode C x and the electrostatic capacitance detecting electrodes C y, i.e., the charge measurement electrode S electrostatic capacitance detection by not disposed between the electrode C x and the electrostatic capacitance detecting electrodes C y, capacitive coupling formed between the electrostatic capacitance detecting electrodes C x and the electrostatic capacitance detecting electrodes C y is the charge measuring electrode S is less affected by noise generated from S. Therefore, by measuring the change in capacitance at the intersection between the electrostatic capacitance detecting electrodes C x and the electrostatic capacitance detecting electrodes C y, which enables accurate detection of the position where the pressing is applied.
- the middle electrode 20 is composed of the reference potential electrode G, the electromagnetic noise generated from the charge measuring electrode S of the lower electrode 30 can be shielded by the middle electrode 20.
- the electrostatic capacitance detecting electrodes C x and the electrostatic capacitance detecting electrodes C y since it is not receiving the noise, the touch panel 1 is capable extremely accurate detection the position where the pressing is applied .
- the touch panel 1 of the first specific example may include a protective member made of glass or plastic on the upper electrode 10.
- the capacitance detection electrode C x , the capacitance detection electrode C y , and the insulating member 60 constituting the upper electrode 10 may be disposed on the lower surface on the protective member side.
- a display member made of liquid crystal or organic EL may be disposed under the lower electrode 30 of the touch panel 1.
- the charge measuring electrode S and the reference potential electrode G are plate-shaped.
- the charge measuring electrode S and the reference potential electrode G may be disposed so as to overlap with each other via the piezoelectric body P.
- it may be partial or patterned.
- FIG. 13 is a perspective exploded view of a touch panel with a pressure detection function according to the second specific example.
- the touch panel 1 includes an upper electrode 10, a middle electrode 20, a lower electrode 30, an upper insertion member 40, and a lower insertion member 50.
- the upper electrode 10 is made of a strip-shaped electrostatic capacitance detection electrodes C x to be arrayed in the X-axis direction.
- Central electrode 20 is made of a strip-shaped electrostatic capacitance detection electrodes C y are arrayed in the Y-axis direction.
- the lower electrode 30 includes strip-shaped charge measuring electrodes S arranged in the Y-axis direction.
- the upper insertion member 40 is made of an insulator I, and the lower insertion member 50 is made of a piezoelectric body P.
- the charge measurement electrode S is disposed apart from the capacitance detecting electrode C x and the electrostatic capacitance detecting electrodes C y, i.e., the charge measuring electrode S and the electrostatic capacitance detecting electrodes C x by not disposed between the electrostatic capacitance detecting electrodes C y, capacitive coupling formed between the electrostatic capacitance detecting electrodes C x and the electrostatic capacitance detecting electrodes C y are generated from the charge measuring electrodes S It is less susceptible to noise. Therefore, by measuring the change in capacitance at the intersection between the electrostatic capacitance detecting electrodes C x and the electrostatic capacitance detecting electrodes C y, which enables accurate detection of the position where the pressing is applied.
- the capacitance detection electrode Cy also serves as the reference potential electrode G.
- the electrostatic capacitance detecting electrodes C y also serves as a reference potential electrode G, the generated electric charges in the piezoelectric P can be detected by the charge measurement electrodes S when the pressing is applied. Therefore, the touch panel 1 can detect a pressing load when a pressure is applied.
- an amplifier may be connected to the charge measuring electrode S.
- the signal of the charge can be detected by the amplifier even when the charge is small.
- the touch detection function-equipped touch panel 1 may include a protective member made of glass or plastic on the upper electrode 10.
- the electrostatic capacitance detecting electrodes C x constituting the upper electrode 10 may be disposed directly on the lower surface of the protective member.
- a display member made of liquid crystal or organic EL may be disposed under the lower electrode 30 of the touch panel 1.
- the electrostatic capacitance detecting electrodes C y of the electrostatic capacitance detection electrodes C x to be arranged in the X-axis direction on the upper electrode 10 are arranged in the Y-axis direction is disposed ,, central electrode 20 is arranged there has been described a case where there, electrostatic capacitance detecting electrodes C y are arranged in the upper electrode 10 may be disposed electrostatic capacitance detection electrode C x Chubu electrode 20. Further, the charge measuring electrode S may be flat.
- FIG. 14 shows other specific examples of the touch detection function-equipped touch panel according to the fourth embodiment.
- the capacitance detection electrode C x the capacitance detection electrode C y , the charge measurement electrode S, and the reference potential electrode G disposed on the upper electrode 10, the middle electrode 20, and the lower electrode 30, see FIG. As shown in FIG.
- the touch detection function-equipped touch panel 1 may include an adhesive layer 70 between the upper insertion member 40 and the lower insertion member 50.
- the adhesive layer 70 is provided between the middle electrode 20 and the lower insertion member 50 as shown in FIG. 15, or between the middle electrode 20 and the upper insertion member 40 as shown in FIG.
- the touch panel 1 shown in FIG. 15 uses a double-sided electrode member in which electrodes are laminated on the upper and lower surfaces of the upper insertion member 40 and a single-sided electrode member in which electrodes are laminated on the lower surface of the lower insertion member 50 using an adhesive. May be created by pasting together.
- the double-sided electrode member may be formed by patterning the ITO by etching or the like on a member (DITO) in which ITO is laminated on the upper and lower surfaces of the upper insertion member 40 by sputtering.
- DITO dielectric tin oxide
- the single-sided electrode member may be formed by laminating a conductive member such as ITO on one side of the lower insertion member 50 by sputtering and patterning the conductive member by etching or the like.
- the touch panel 1 shown in FIG. 16 includes a single-sided electrode-attached member in which electrodes are laminated on the upper surface of the upper insertion member 40, and a double-sided electrode-attached member in which electrodes are laminated on the upper and lower surfaces of the lower insertion member 50, respectively.
- the preparation methods of the member with a single-sided electrode and the member with a double-sided electrode are the same as the above.
- the support members 80 and 81 are provided. , 82 may be attached to the upper insertion member 40 and the lower insertion member 50 via the adhesive layers 71, 72, 73, respectively, in which the upper electrode 10, the middle electrode 20, and the lower electrode 30 are laminated.
- the upper insertion member 40 has an upper surface and a lower surface on which a conductive sheet in which an electrode is laminated is attached
- the lower insertion member 50 has an upper surface on which the conductive sheet is attached. You may create by sticking together. According to the above method, the electrodes are not directly formed on the upper insertion member 40 or the lower insertion member 50. Therefore, even if the upper insertion member 40 or the lower insertion member 50 is vulnerable to heat, the electrodes are not attached to these insertion members. It is preferable at the point which can be laminated
- the touch panel 1 shown in FIG. 18 uses a bonding agent in which the conductive sheet is bonded to the upper surface of the upper insertion member 40 and the conductive sheet is bonded to the upper and lower surfaces of the lower insertion member 50. You may create by sticking together.
- the support members 80, 81, and 82 are basically composed of film members.
- the support member 80 may be made of a protective member such as glass. If the support member 80 is comprised from a protection member, the support member 80 will have a function as a surface protection member of the touch panel 1 with a pressure detection function, and a function as a support member of the upper electrode 10. Therefore, the touch panel 1 is a highly productive and thin touch panel 1.
- a display member made of liquid crystal or organic EL may be disposed under the touch panel 1.
- the touch panel 1 is preferably composed of a transparent member.
- the lower surface of the support member 82 is preferably subjected to antireflection treatment. This is because an image displayed on the display device is easily visible when antireflection treatment is performed on the above-described portion.
Abstract
Description
さらに、近年、携帯電話、スマートフォン、ゲーム機などでタッチパネルを備えた電子機器が普及している。このような電子機器は、LCDなどの表示パネルの上に透明タッチパネルを配置した構成をとっており、表示パネルに表示されるボタンを指やスタイラスで触れるだけで操作ができるようになっている。さらに、手書き入力によって文字を入力したり、図形なども描写できるようになっている。そのため、上記電子機器は、直感的な入力が可能なUIとなっている。
しかし、上記タッチパネルは、与えられた荷重を検出することはできない。そのため、毛筆体のような文字描写や押し込み動作を検出できないなど、UIとしては不十分である。
その一方で、与えられた荷重を検出できる圧電センサが知られている。例えば、特許文献1には、透明感圧層と、透明導電層からなる透明圧電センサが開示されている。
本発明は、上記問題を省みたものであり、本発明の目的は、精度の高い位置検出と押圧検出ができる押圧検出機能付タッチパネルを提供することにある。
押圧面に入力された押圧荷重を検出できる押圧検出機能付タッチパネルであって、
前記押圧面から順に、
上部電極と、上挿入部材と、中部電極と、下挿入部材、下部電極とが配置され、
前記上部電極と前記中部電極と前記下部電極のいずれかは、
前記押圧検出機能付タッチパネルに対して入力がなされたとき、押圧位置を検出する静電容量検出電極と、前記押圧に応じた電荷を検出する電荷測定用検出電極を備え、
前記上挿入部材と前記下部挿入部材は、一方が絶縁体であり、他方が圧電体である押圧検出機能付タッチパネルである。
(1) 前記上部電極と前記上挿入部材とで形成される空間
(2) 前記上挿入部材と前記中部電極とで形成される空間
(3) 前記下挿入部材と前記下部電極とで形成される空間
(1)押圧検出機能付タッチパネルの全体構造
図1を用いて、本発明の第1実施形態に係る押圧検出機能付タッチパネルを説明する。図1は押圧検出機能付タッチパネルの断面図である。
なお、上記部材は、タッチパネル1の押圧面から、上部電極10、上挿入部材40、中部電極20、下挿入部材50、下部電極30の順番で配置されている。
以下で、押圧検出機能付タッチパネル1の構成を詳細に説明する。
タッチパネル1を構成する電極は、上部電極10、中部電極20、下部電極30からなる。上部電極10、中部電極20、下部電極30は、静電容量検出電極、電荷測定用検出電極、基準電位電極のいずれか、またはこれら電極を組合わせた構成からなる。
なお、静電容量検出電極は、押圧手段Mによってタッチパネル1に押圧が加えられたとき、押圧手段Mがタッチパネル1に接触することによって静電容量検出電極間に生じる静電容量の変化から押圧位置を検出する電極である。
電荷測定用電極は、タッチパネル1に押圧がかかったときに発生する電荷を検出する電極である。基準電位電極は、電位が常に一定の電極である。なお、上記において、押圧手段Mとは指やスタイラスペンなど、タッチパネル1に押圧を加えるものを指している。
タッチパネル1を構成する挿入部材は、上挿入部材40と下挿入部材50からなる。上挿入部材40と、下挿入部材50は、圧電体または絶縁体からなる。具体的には、上挿入部材40が圧電体から構成される場合、下挿入部材50は絶縁体から構成され、上挿入部材が40絶縁体から構成される場合、下挿入部材50は圧電体から構成される。
圧電体を構成する材料としては、無機圧電材料や有機圧電材料が挙げられる。
絶縁体を構成する材料としては、有機材料、無機材料、有機-無機ハイブリッド材料が挙げられる。有機材料としては、アクリル、ポリカーボネート、ポリエチレンテレフタレート、シクロオレフィンポリマなどを挙げることができる。無機材料としては、ガラス板などが挙げられる。有機-無機ハイブリッド材料としては、樹脂の中にガラス繊維を含有させた材料を挙げることができる。
本発明の押圧検出機能付タッチパネル1は、静電容量検出電極と、電荷測定用電極と、圧電体を備えている。従って、タッチパネル1に押圧が加えられたとき、押圧位置を静電容量検出電極で検出し、押圧により発生した電荷を電荷測定用電極で検出することにより、タッチパネル1にかかった押圧位置と押圧荷重を検出できるようになっている。
(1)押圧検出機能付タッチパネルの全体構造
図2を用いて、本発明の第2実施形態に係る押圧検出機能付タッチパネル1を説明する。 図2は押圧検出機能付タッチパネルの断面図である。なお、第2実施形態のタッチパネル1の基本的な構成は、第1実施形態と同じであるので、下記では第2実施形態に特徴的な点について説明する。
図3は、具体例1に係る押圧検出機能付タッチパネル1の斜視分解図である。図3に示すように、具体例1のタッチパネル1は、上部電極10と、中部電極20と、下部電極30と、上挿入部材40と、下挿入部材50とを備えている。
上記のように、電荷測定用電極Sと基準電位電極Gの間に圧電体Pが配置されることによって、押圧が加わったときに圧電体Pで発生する電荷を電荷測定用電極Sで検出することが可能となる。従って、上記タッチパネル1に押圧が加わったとき、押圧荷重の検出が可能となっている。
図4は、具体例2に係るタッチパネル1の斜視分解図である。図4に示すように、具体例2のタッチパネル1は、上部電極10と、中部電極20と、下部電極30と、上挿入部材40と、下挿入部材50を備えている。
図5は、具体例3に係る押圧検出機能付タッチパネルの斜視分解図である。図6は、上部電極の平面図である。図5に示すように、具体例3の押圧検出機能付タッチパネル1は、上部電極10と、中部電極20と、下部電極30と、上挿入部材40と、下挿入部材50とを備えている。
第2実施形態に係る押圧検出機能付タッチパネル1のその他の具体例について、図8に示す。図8に示すように、具体例A1は、上挿入部材40は絶縁体Iを備え、下挿入部材50は圧電体Pを備えている。上部電極10は、X軸方向に配列される静電容量検出電極CxとY軸方向に配列される静電容量検出電極Cyを備えている。中部電極20は電荷測定用電極Sを備え、下部電極30は基準電位電極Gを備えている。なお、具体例A2~A11については、図8に示す通りである。
(1)押圧検出機能付タッチパネルの全体構造
図9を用いて、本発明の第3実施形態に係る押圧検出機能付タッチパネルを説明する。図9は押圧検出機能付タッチパネルの断面図である。図10は、第3実施形態の具体例について示した図である。なお、第3実施形態のタッチパネルの基本的な構成は、第1実施形態と同じであるので、下記では第3実施形態に特徴的な点について説明する。
(1)押圧検出機能付タッチパネルの全体構造
図11を用いて、本発明の第4実施形態に係る押圧検出機能付タッチパネルを説明する。図11は押圧検出機能付タッチパネルの断面図である。なお、第4実施形態のタッチパネルの基本的な構成は、第1実施形態と同じであるので、下記では第4実施形態に特徴的な点について説明する。
図12は、具体例1に係る押圧検出機能付タッチパネルの斜視分解図である。
図12に示すように、具体例1の押圧検出機能付タッチパネル1は、上部電極10と、中部電極20と、下部電極30と、上挿入部材40と、下挿入部材50を備えている。
図13は、具体例2に係る押圧検出機能付タッチパネルの斜視分解図である。
図13に示すように、タッチパネル1は、上部電極10と、中部電極20と、下部電極30と、上挿入部材40と、下挿入部材50を備えている。
第4実施形態に係る押圧検出機能付タッチパネルについて、その他の具体例を図14に示す。上部電極10、中部電極20、下部電極30に配置される静電容量検出電極Cx、静電容量検出電極Cy、電荷測定用電極S、基準電位電極Gのその他の配置方法については、図14に示す通りである。
図15、図16に示すように、押圧検出機能付タッチパネル1は、上挿入部材40と下挿入部材50との間に接着層70を備えていてもよい。接着層70は、図15に示すように中部電極20と下挿入部材50との間に設けられるか、図16に示すように中部電極20と上挿入部材40との間に設けられる。
10:上部電極
20:中部電極
30:下部電極
40:上挿入部材
50:下挿入部材
60:絶縁部材
Cx:静電容量検出電極
Cy:静電容量検出電極
G:基準電位電極
I:絶縁体
M:押圧手段
P:圧電体
S:電荷測定用電極
Claims (15)
- 押圧面に入力された押圧荷重を検出できる押圧検出機能付タッチパネルであって、
前記押圧面から順に、
上部電極と、上挿入部材と、中部電極と、下挿入部材、下部電極とが配置され、
前記上部電極と前記中部電極と前記下部電極のいずれかは、
前記押圧検出機能付タッチパネルに対して入力がなされたとき、押圧位置を検出する静電容量検出電極と、前記押圧に応じた電荷を検出する電荷測定用検出電極を備え、
前記上挿入部材と前記下部挿入部材は、一方が絶縁体であり、他方が圧電体である押圧検出機能付タッチパネル。 - 前記中部電極は、前記電荷測定用電極を備える請求項1の押圧検出機能付タッチパネル。
- 前記上部電極は、前記静電容量検出電極を備える請求項2の押圧検出機能付タッチパネル。
- 前記上部電極は、前記静電容量検出電極を備え、
前記下部電極は、一定の電位に固定されている基準電位電極を備える請求項3の押圧検出機能付タッチパネル。 - 前記上部電極は、一の静電容量検出電極を備え、
前記中部電極は、他の静電容量検出電極を備え、
前記下部電極は、一定の電位に固定されている基準電位電極を備える請求項3の押圧検出機能付タッチパネル。 - 前記上挿入部材は、絶縁体であり、
前記下部挿入部材は、圧電体であり、
前記上部電極は、一の静電容量検出電極を備え、
前記下部電極は、他の静電容量検出電極を備える請求項3の押圧検出機能付タッチパネル。 - 前記上挿入部材は、圧電体であり、
前記下部挿入部材は、絶縁体であり、
前記上部電極または前記中部電極は、前記電荷測定用電極を備える請求項1の押圧検出機能付タッチパネル。 - 前記上挿入部材は、絶縁体であり、
前記下部挿入部材は、圧電体であり、
前記上部電極と前記中部電極の少なくとも一方の電極は、静電容量検出電極を備え、
前記下部電極は、前記電荷測定用電極を備える請求項1の押圧検出機能付タッチパネル。 - 前記上挿入部材は、絶縁体であり、
前記下部挿入部材は、圧電体であり、
前記上部電極と前記中部電極の少なくとも一方の電極は、静電容量検出電極を備え、
前記中部電極は、基準電位電極であり、
前記下部電極は、前記電荷測定用電極を備える請求項1の押圧検出機能付タッチパネル。 - 前記中部電極と前記下挿入部材の間に配置される接着層を備える請求項1~9の押圧検出機能付タッチパネル。
- 前記上挿入部材と前記中部電極の間に配置される接着層を備える請求項1~9の押圧検出機能付タッチパネル。
- 下記の空間に接着層が配置された請求項1~9の押圧検出機能付タッチパネル。
(1) 前記上部電極と前記上挿入部材とで形成される空間
(2) 前記上挿入部材と前記中部電極とで形成される空間
(3) 前記下挿入部材と前記下部電極とで形成される空間 - 前記上部電極の上面に支持部材が配置された請求項12の押圧検出機能付タッチパネル。
- 前記支持部材が保護部材である請求項13の押圧検出機能付タッチパネル。
- 請求項1~14の押圧検出機能付タッチパネルの下に表示部材が設けられ、前記押圧検出機能付タッチパネルが透明である電子機器。
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US20160231849A1 (en) | 2016-08-11 |
CN105378609B (zh) | 2017-03-15 |
JP2015005231A (ja) | 2015-01-08 |
KR101623809B1 (ko) | 2016-05-24 |
JP5722954B2 (ja) | 2015-05-27 |
KR20160006792A (ko) | 2016-01-19 |
TW201508560A (zh) | 2015-03-01 |
CN105378609A (zh) | 2016-03-02 |
US9417725B1 (en) | 2016-08-16 |
TWI526885B (zh) | 2016-03-21 |
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