WO2019052304A1 - 触控面板及其驱动方法、触控装置 - Google Patents

触控面板及其驱动方法、触控装置 Download PDF

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Publication number
WO2019052304A1
WO2019052304A1 PCT/CN2018/100837 CN2018100837W WO2019052304A1 WO 2019052304 A1 WO2019052304 A1 WO 2019052304A1 CN 2018100837 W CN2018100837 W CN 2018100837W WO 2019052304 A1 WO2019052304 A1 WO 2019052304A1
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Prior art keywords
electrode
touch
substrate
signal
touch panel
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PCT/CN2018/100837
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English (en)
French (fr)
Inventor
刘英明
王海生
丁小梁
董学
许睿
李昌峰
邓立广
Original Assignee
京东方科技集团股份有限公司
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Priority to EP18855145.1A priority Critical patent/EP3683662A4/en
Priority to US16/334,221 priority patent/US11347348B2/en
Publication of WO2019052304A1 publication Critical patent/WO2019052304A1/zh

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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
    • G06F3/0414—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using force sensing means to determine a position
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0416—Control or interface arrangements specially adapted for digitisers
    • G06F3/04166—Details of scanning methods, e.g. sampling time, grouping of sub areas or time sharing with display driving
    • 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
    • G06F3/0412—Digitisers structurally integrated in a display
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04105—Pressure sensors for measuring the pressure or force exerted on the touch surface without providing the touch position

Definitions

  • At least one example of the present disclosure relates to a touch panel, a driving method thereof, and a touch device.
  • the 3D touch including Pressure Touch is more widely used by IPhone, and its application is more and more extensive.
  • By increasing the pressure detection more touch functions can be realized, and at the same time, the pressure is judged by the size.
  • At least one example of the present disclosure relates to a touch panel, a driving method thereof, and a touch device.
  • a touch panel including: a first substrate, a second substrate, a first electrode, a piezoelectric layer, and a second electrode.
  • the second substrate is disposed opposite to the first substrate.
  • the first electrode is located on a side of the first substrate from the second substrate, and is configured to provide a reference.
  • a piezoelectric layer is located between the first electrode and the first substrate.
  • the second electrode is located between the first substrate and the second substrate.
  • the piezoelectric layer is configured to generate a first charge on a side thereof proximate to the second electrode when pressed, the second electrode being configured to couple the first charge at a pressed position and output a touch signal.
  • the material of the first electrode is a high-resistance material having a sheet resistance greater than 1 M ⁇ / ⁇ .
  • the first electrode is connected to a reference voltage terminal.
  • the first electrode is further configured to derive at least one of static electricity and a second electric charge, and the second electric charge is a resultant generated when the piezoelectric layer is pressed
  • the first charge is opposite in polarity.
  • the piezoelectric layer is in contact with the first electrode.
  • a touch panel according to an example of the present disclosure further includes a conductive mesh electrode, wherein the conductive mesh electrode is disposed between the first electrode and the piezoelectric layer.
  • the second electrode includes a plurality of second sub-electrodes insulated from each other, an orthographic projection of the conductive mesh electrodes on the first substrate, and the plurality of The orthographic projections of the second sub-electrodes on the first substrate do not coincide.
  • an orthographic projection of a grid of the conductive grid electrode on the first substrate substrate is positive on an adjacent second sub-electrode on the first substrate Between projections.
  • the second electrode is located on a side of the first substrate that is away from the piezoelectric layer.
  • the second electrode is located on a side of the second substrate that is adjacent to the first substrate.
  • the second electrode is multiplexed as a display electrode.
  • the shape of the first electrode includes a planar shape or a mesh shape
  • the shape of the piezoelectric layer includes a planar shape or a mesh shape
  • a touch panel further includes a detecting unit, wherein the detecting unit is configured to detect the detection signal to obtain the touch pressure.
  • At least one example of the present disclosure further provides a driving method of the touch panel provided by any of the above examples, comprising: inputting a reference signal to the first electrode; inputting a touch driving signal to the second electrode, wherein the piezoelectric layer is Producing a first electric charge on a side close to the second electrode when pressed, the second electrode coupling the first electric charge at a pressing position, and outputting the touch signal; detecting the touch signal to identify Touch position and touch pressure.
  • detecting the touch signal to identify a touch position and a touch pressure includes: decomposing a touch position signal and a touch superposition signal from the touch signal, and obtaining a touch from the touch position signal Position, the touch pressure is obtained by the touch superposition signal.
  • the touch and display are performed in a time division manner, the driving method including: inputting a display signal to the second electrode in a first period of time; and to the second in a second period of time The electrode inputs the touch drive signal.
  • At least one example of the present disclosure further provides a touch device including the touch panel provided by any of the examples of the present disclosure.
  • Figure 1 is a state diagram of a piezoelectric material when it is not subjected to an external force
  • FIG. 2 is a state diagram of a piezoelectric material subjected to an external force to produce a piezoelectric effect
  • 3A is a cross-sectional view of a touch panel provided by an example of the present disclosure.
  • FIG. 3B is a cross-sectional view of a touch panel provided by an example of the present disclosure.
  • 3C is a cross-sectional view of a touch panel provided by an example of the present disclosure.
  • FIG. 4 is a cross-sectional view of a touch panel provided by an example of the present disclosure.
  • FIG. 5 is a top plan view of a first electrode in a touch panel according to an example of the present disclosure
  • FIG. 6 is a top plan view of a second electrode in a touch panel according to an example of the present disclosure
  • FIG. 7 is a top plan view of a first electrode and a second electrode in a touch panel according to an example of the present disclosure
  • FIG. 8 is a top plan view of a conductive grid electrode in a touch panel according to an example of the present disclosure
  • FIG. 9 is a top plan view of a conductive grid electrode and a second electrode in a touch panel according to an example of the present disclosure.
  • FIG. 10 is a top plan view of a conductive grid electrode and a second electrode in a touch panel according to an example of the present disclosure.
  • Fig. 1 is a view showing a state in which a piezoelectric material is not subjected to an external force. As shown in Fig. 1, when the piezoelectric material is not subjected to an external force, the charge is randomly distributed and the surface is not charged.
  • Fig. 2 is a state diagram of a piezoelectric material produced by an external force to produce a piezoelectric effect. As shown in FIG. 2, when the piezoelectric material is subjected to an external force, deformation occurs, causing the surface of the piezoelectric material to be charged. One surface of the piezoelectric material has a first electric charge C1, and the other surface opposite to the surface has a second electric charge C2. The first charge and the second charge are opposite in polarity. The description will be made by taking the first charge C1 as a positive charge and the second charge as a negative charge as an example, but is not limited thereto.
  • the examples of the present disclosure employ piezoelectric materials to facilitate sensitive pressure touch detection.
  • FIG. 3A is a cross-sectional view of a touch panel provided by an example of the present disclosure.
  • a touch panel including a first substrate substrate 101 , a second substrate substrate 201 , a first electrode 111 , a piezoelectric layer 112 , and a second electrode 211 .
  • the second base substrate 201 is disposed opposite to the first base substrate 101.
  • the first electrode 111 is located on a side of the first base substrate 101 away from the second base substrate 201, and is configured to provide a reference datum.
  • the piezoelectric layer 112 is located between the first electrode 111 and the first base substrate 101.
  • the piezoelectric layer 112 is on a side of the first base substrate 101 away from the second base substrate 201.
  • the second electrode 211 is located between the first base substrate 101 and the second base substrate 201.
  • the second electrode 211 is located on the first base substrate 101 or the second base substrate 201.
  • the second electrode 211 may be located on the side of the second base substrate 201 adjacent to the first base substrate 101, or may be located.
  • the first base substrate 101 is adjacent to one side of the second base substrate 201.
  • the piezoelectric layer 112 is located between the first electrode 111 and the second electrode 211, and the second electrode 211 and the piezoelectric layer 112 overlap in a direction perpendicular to the first substrate 101.
  • the orthographic projection of the second electrode 211 on the first substrate 101 falls within the orthographic projection of the piezoelectric layer 112 on the first substrate 101.
  • the piezoelectric layer 112 is configured to generate a first charge on a side thereof near the second electrode 211 when it is pressed, and the second electrode 211 is configured to couple the first charge at the pressed position and output a touch signal to identify the touch position And touch pressure.
  • the second electrode 211 can be a self-capacitance electrode. As shown in FIG. 3A, the second electrode 211 may include a plurality of second sub-electrodes 2111 insulated from each other. The touch position can be identified by the output signal of the second electrode 211 (the plurality of second sub-electrodes 2111).
  • the second electrode 211 may employ a transparent conductive metal oxide.
  • the transparent conductive metal oxide includes, for example, indium tin oxide (ITO), but is not limited thereto. Since the second electrode 211 can couple the first electric charge, the output signal (touch signal) of the touch position can be enhanced, and thus, the touch pressure can be recognized.
  • the principle of implementing the touch is: when the finger touches the light-emitting side of the touch panel due to the electric field of the human body (for example, the first substrate in FIG. 3A is away from the second substrate).
  • the finger acts as a conductor, and forms an external capacitance (Ce) with the second electrode 211 (the plurality of second sub-electrodes 2111); an external capacitor (Ce) and a second electrode 211 (the plurality of second sub-electrodes 2111)
  • the self-inductance capacitor (Cp) forms a coupling electric field between the second electrode 211 (the plurality of second sub-electrodes 2111) and the finger, which will change the size of the self-inductance capacitor (Cp). According to the change of the self-inductance capacitor (Cp), the position of the touch point can be calculated, thereby implementing the touch position recognition function.
  • the principle of implementing the pressure detection is that the piezoelectric layer 112 generates a first electric charge on the side close to the second electrode 211 under an external force (pressing), and the first electric charge is on the second electrode 211 (the plurality of second sub-electrodes 2111) Forming a coupling electric field with the finger will change the size of the self-inductance capacitor (Cp). According to the change of the self-inductance capacitance of the touch point position, the touch pressure of the touch point can be calculated, thereby implementing the touch pressure recognition function. For example, the second electrode 211 (second sub-electrode 211) at the pressed position is coupled with the first electric charge.
  • the pressure is large, the first electric charge generated is large, and thus the first electric charge generated has a large influence on the self-inductance capacitance (Cp), and the self-inductance capacitance (Cp) changes greatly. That is, the magnitude of the touch pressure can be known from the degree of change in the self-inductance capacitance (Cp).
  • the touch signal differs due to the amount of first charge coupled.
  • the touch signal increases due to an increase in the amount of coupled first charge.
  • the touch signal includes a pressure signal formed by coupling the first charge.
  • the output signal at the touch location includes a pressure signal (superimposed signal).
  • the output signal at the touch position is obtained by the self-inductance capacitance (Cp) of the second electrode 211 (second sub-electrode 2111) and the capacitance of the external capacitance (Ce) superimposed at the touch position. Touch the electrical signal of the location.
  • the piezoelectric layer 112 may be disposed outside the first substrate 101 and the second substrate 201 to avoid affecting the display.
  • the touch panel provided by at least one example of the present disclosure has a pressure detecting function. Since the piezoelectric layer is provided, when a force is applied by an external force such as a finger press, the piezoelectric material characteristic acts, and the electric charge generated by the piezoelectric material is coupled to the second electrode 211, and acts under the action of the first electrode 111 as the reference electrode. The corresponding touch signal can be read out to obtain a pressure signal.
  • the touch signal includes, for example, a voltage and/or current signal.
  • the touch panel provided by at least one example of the present disclosure has a simple structure, low cost, and obvious advantages, and can realize pressure touch detection and sensitive pressure touch detection.
  • the first base substrate 101 and the second base substrate 201 may be glass substrates, but are not limited thereto, and other insulating materials may be used.
  • the first electrode 111 and the piezoelectric layer 112 are disposed on a side of the first base substrate 101 away from the second base substrate 201.
  • the piezoelectric layer 112 may be in contact with the first base substrate 101, but is not limited thereto.
  • at least the first base substrate 101 is included between the second electrode 211 and the piezoelectric layer 112.
  • the piezoelectric layer 112 is made of a piezoelectric material, and the piezoelectric layer 112 has a piezoelectric effect.
  • Piezoelectric effect refers to the deformation of some media under the action of external force, causing the surface of the medium to be charged, which is a positive piezoelectric effect.
  • the piezoelectric layer 112 material includes at least one of an organic piezoelectric material and an inorganic piezoelectric material.
  • the organic piezoelectric material includes, but is not limited to, polyvinylidene chloride (PVDF), polyvinylidene fluoride piezoelectric material, etc.
  • the inorganic piezoelectric material includes aluminum nitride, but is not limited thereto, and other materials may be used. Piezoelectric layer.
  • Touch can be divided into two situations: no pressure and pressure.
  • the piezoelectric material can be used as an insulating material.
  • the touch position can be known by the touch signal output by the second electrode 211 (the second electrode 211 does not couple the first charge, and the touch signal does not include the pressure signal).
  • the touch position and the touch pressure can be known by the touch signal after the pressure signal is superimposed by the second electrode 211 (the second electrode 211 couples the first charge, the touch signal includes the pressure signal).
  • the signal output from the second electrode 211 is different due to the coupled charge and the uncoupled charge, so that it is possible to distinguish whether there is a touch pressure.
  • the magnitude of the touch pressure can be distinguished by the amount of coupled charge.
  • the touch position and the touch pressure may be determined by an algorithm according to the touch signal output by the second electrode 211.
  • the touch panel may further include a detecting unit 222, which may be disposed on the second base substrate 201, and the detecting unit 222 is configured to detect a touch signal output by the second electrode 211 to detect the touch pressure.
  • the detecting unit 222 includes, for example, a detecting circuit (detection IC).
  • the plurality of second sub-electrodes 2111 can be electrically connected to the detecting unit 222, respectively.
  • the piezoelectric layer 112 is electrically connected to the first electrode 111, but is not limited thereto, and may be insulated from each other.
  • the piezoelectric layer 112 is in contact with the first electrode 111.
  • the first charge formed by the piezoelectric layer 112 on the side surface close to the first base substrate 101 can be coupled to the second electrode 211 / the second sub-electrode 2111.
  • the first electrode 111 is further configured to derive at least one of static electricity and a second charge, which is a first charge polarity generated when the piezoelectric layer 112 is pressed The opposite charge.
  • the second electrode 211 and the piezoelectric layer 112 are spaced apart from each other by at least the first substrate 101 .
  • the second electrode 211 is located on a side of the second base substrate 201 close to the first base substrate 101.
  • the second electrode 211 is located on the second base substrate 201.
  • the second electrode 211 may be multiplexed using electrodes in the display panel, for example, may be multiplexed into the second electrode 211 by using a common electrode in the display panel, but is not limited thereto.
  • the common electrode may be an electrode in the liquid crystal display panel that generates an electric field to drive the liquid crystal to rotate
  • the second substrate 201 may be an array substrate
  • the first substrate 101 may be an opposite substrate, such as a color filter substrate.
  • the common electrode may be a cathode for display in an organic light emitting diode (OLED) display panel.
  • OLED organic light emitting diode
  • the touch panel is an OLED display panel
  • the first substrate 101 may be a package substrate
  • the second substrate 201 may be an array substrate
  • the array substrate may include a thin film transistor and an anode electrically connected to the drain of the thin film transistor. a cathode, and a functional layer of organic material between the anode and the cathode.
  • the first electrode 111 is connected to a reference voltage terminal, and the reference voltage terminal is, for example, a ground terminal.
  • the reference voltage terminal is, for example, a ground terminal.
  • the example of the present disclosure is described by taking a grounding as an example.
  • the first electrode 111 may be connected to the reference voltage terminal by a silver paste.
  • the grounding of the first electrode 111 prevents the influence of external static electricity on the touch panel, and the external static electricity is introduced into the grounding point by the first electrode 111, thereby protecting the display screen from external static electricity.
  • the reference voltage terminal may be located on the second substrate 201. Since the first electrode 111 is made of a high-resistance material and the resistance of the high-resistance material is about M ohm level, the touch signal is not affected by the shielding.
  • the first electrode 111 is made of a high-impedance material, and the material having a sheet resistance of more than 1 M ⁇ / ⁇ ( ⁇ /sq) may be a high-resistance material.
  • the sheet resistance is the resistance value per unit area of the unit thickness of the conductive material.
  • the sheet resistance is the ratio of resistivity to material thickness. Since the resistance of the high-resistance material is high, the touch signal is not affected by the shielding, and the external static electricity is introduced into the reference voltage terminal such as the grounding point by the high-resistance material, thereby protecting the touch panel from external static electricity.
  • the material of the first electrode 111 may be doped with insulating particles in a conductive material (conductive main body) to form an insulating material doped conductive material to facilitate the desired impedance.
  • the conductive body includes, for example, polyethylene dioxythiophene (PEDOT) and a transparent conductive metal oxide.
  • the transparent conductive metal oxide includes, for example, indium tin oxide (ITO), but is not limited thereto.
  • the insulating particles include, for example, at least one of silicon oxide and silicon oxynitride.
  • the material of the first electrode 111 includes insulating particle silicon oxide doped polyethylene dioxythiophene (PEDOT), but is not limited thereto.
  • High-impedance materials have high resistance and are also conductive to facilitate the supply of fixed potential and/or charge.
  • the first electrode 111 may be made of a transparent material to facilitate improvement in transmittance.
  • the first electrode 111 may be a transparent conductive high-resistance material.
  • FIG. 3B is a cross-sectional view of a touch panel provided by an example of the present disclosure.
  • the first base substrate 101 and the second base substrate 201 are oppositely disposed to form a case.
  • the first base substrate 101 and the second base substrate 201 may be bonded together by a sealant 123.
  • a liquid crystal layer 124 is disposed in the case.
  • the example of the present disclosure is described by taking a touch liquid crystal display panel as an example, but is not limited thereto, and may be another display panel such as an organic light emitting diode display panel or the like.
  • the first polarizing plate 102 and the second polarizing plate 202 are also shown in FIG. 3B.
  • the piezoelectric layer 112 may be disposed on a side of the second polarizing plate 202 away from the first base substrate 101, but is not limited thereto.
  • the piezoelectric layer 112 may also be disposed between the first base substrate 101 and the first polarizing plate 102.
  • the touch panel/touch display panel may further include a black matrix 103 and a color film layer 104 in order to realize color display.
  • a backlight 301 is also shown in Figure 3B to provide backlighting.
  • FIG. 3C is a cross-sectional view of a touch panel provided by an example of the present disclosure.
  • the second electrode 211 is located on a side of the first base substrate 101 away from the piezoelectric layer 112.
  • the piezoelectric layer 112 and the second electrode 211 are located on the opposite side of the first base substrate 101.
  • FIG. 4 is a cross-sectional view of a touch panel provided by an example of the present disclosure.
  • the touch panel in order to make the first electrode 111 better implement a fixed electrode (potential fixed) and the signal is uniform, the touch panel further includes a conductive grid electrode. 113.
  • a conductive mesh electrode 113 may be disposed between the first electrode 111 and the piezoelectric layer 112.
  • the material of the conductive mesh electrode 113 includes a transparent conductive material, for example, including graphene or nano silver.
  • the conductive grid electrode 113 and the plurality of second sub-electrodes 2111 do not coincide in a direction perpendicular to the first substrate 101 in order not to affect the touch.
  • the orthographic projection of the conductive mesh electrode 113 on the first substrate 101 and the orthographic projection of the plurality of second sub-electrodes 2111 on the first substrate 101 do not coincide.
  • the orthographic projection of the conductive mesh electrode 113 on the first substrate 101 does not coincide with the orthographic projection of the plurality of second sub-electrodes 2111 on the first substrate 101.
  • non-coincident means that there is no overlapping area.
  • each of the second sub-electrodes 2111 may be separately drawn to facilitate signal output, but is not limited thereto.
  • a grid 1131 of conductive grid electrodes 113 is between adjacent second sub-electrodes 2111 .
  • the mesh 1131 of the conductive mesh electrode 113 is located at a gap position of the second sub-electrode 2111.
  • the conductive mesh electrode 113 may be electrically connected to the first electrode 111.
  • the conductive mesh electrode 113 may be in contact with the first electrode 111.
  • the conductive grid electrode 113 can be in contact with the piezoelectric layer 112, can prevent external static electricity on the entire surface, and does not affect the touch effect, and can achieve better pressure touch detection.
  • FIG. 5 is a top plan view of a first electrode in a touch panel according to an example of the present disclosure.
  • FIG. 5 shows the planar first electrode 111, but in the example of the present disclosure, the shape of the first electrode 111 is not limited thereto, and may be other shapes such as a mesh shape.
  • the mesh-shaped first electrode 111 can refer to the shape of the conductive mesh electrode 113, but is not limited thereto.
  • the first electrode 111 may also include a plurality of first sub-electrodes insulated from each other.
  • the plurality of first sub-electrodes and the plurality of second sub-electrodes are insulated from each other and disposed at the same time, and detection of the touch position and/or the touch pressure can also be achieved.
  • FIG. 6 is a top plan view of a second electrode in a touch panel according to an example of the present disclosure.
  • FIG. 6 shows a pattern of the second electrode 211 including a plurality of second sub-electrodes 2111 insulated from each other.
  • the plurality of second sub-electrodes 2111 may be arranged in an array.
  • FIG. 7 shows a schematic top view of the first electrode 111 and the second electrode 211.
  • the first electrode 111 and the second electrode 211 overlap at the pattern of the second electrode 211.
  • the first electrode 111 and the second electrode 211 overlap at the pattern of each of the second sub-electrodes 2111.
  • FIG. 8 shows a top plan view of a conductive grid electrode 113.
  • FIG. 9 shows a top plan view of a conductive grid electrode 113 between a plurality of second sub-electrodes 2111 insulated from each other.
  • the grid 1131 of the conductive grid electrode 113 is located in the gap of the adjacent second sub-electrode 2111, and in the plan view, the gap of the second sub-electrode 2111 is completely filled by the conductive grid electrode 113.
  • the projection of the conductive mesh electrode 113 on the first substrate 101 and the projection of the plurality of second sub-electrodes 2111 on the first substrate 101 do not coincide.
  • FIG. 10 shows a top plan view of a conductive grid electrode 113 between a plurality of second sub-electrodes 2111 insulated from each other.
  • the grid 1131 of the conductive grid electrode 113 is located in the gap between the adjacent second sub-electrodes 2111.
  • the second sub-electrode 2111 and the grid 1131 of the conductive mesh electrode 113 have a space 213 therebetween.
  • the shape of the first electrode 111 includes a planar shape or a mesh shape
  • the shape of the piezoelectric layer 112 includes a planar shape or a mesh shape
  • the touch device includes a touch display device.
  • the touch display device includes a liquid crystal display device or an organic light emitting diode display device, etc., but is not limited thereto.
  • At least one example of the present disclosure provides a driving method of the touch panel provided by any of the above examples, including: inputting a reference signal to the first electrode 111, the reference signal includes, for example, a reference voltage; and the second electrode 211 (the plurality of second sub-electrodes 2111) a touch driving signal is input, the second electrode couples the first electric charge at the pressing position (the second sub-electrode 2111 at the pressing position), and outputs a touch signal; and detects the touch signal to identify the touch position and the touch pressure.
  • the plurality of second sub-electrodes 2111 are self-capacitance electrodes, and the touch signal includes dual information of touch position and touch pressure, so that the touch position can be recognized while recognizing the touch pressure.
  • the plurality of second sub-electrodes 2111 are not self-capacitance electrodes, only the touch pressure signal may be output, and only the touch pressure is recognized.
  • the plurality of second sub-electrodes 2111 may not be self-capacitance electrodes.
  • the detection of the touch position and the touch pressure may also be implemented by using a mutual capacitance mode.
  • the driving method of the touch panel provided by at least one example of the present disclosure can simultaneously know the touch position and the touch pressure according to the output signal of the second electrode 211 (the plurality of second sub-electrodes 2111).
  • the touch driving signal may be an alternating current signal, for example, may be an alternating voltage signal, but is not limited thereto.
  • detecting a touch signal to identify a touch position and the touch pressure includes: decomposing a touch position signal and a touch superimposition signal from a touch signal, and obtaining a touch position by the touch position signal, Touch the overlay signal to get the touch pressure (pressure).
  • touch and display may be performed in a time-division manner, and the driving method includes: inputting to the second electrode 211 in a first period of time The display signal is input; in the second period of time, the touch driving signal is input to the second electrode 211.
  • the first time period is a display time period and the second time period is a touch time period.
  • the display period in addition to inputting the display signal to the second electrode 211, may be combined with other operations for performing display, for example, inputting a data signal to the pixel electrode.
  • the plurality of second sub-electrodes 2111 output a touch signal; the second sub-electrode 2111 at the untouched position outputs the touch reference signal S1, and the second sub-electrode 2111 at the touch position outputs the touch position signal S2, which is different due to the touch position signal S2
  • the reference signal S1 is touched so that the touch position can be recognized.
  • the touch signal Sp output by the second electrode (the second sub-electrode 2111) at the touch position includes the touch position signal S2 and the touch superimposition signal S3, and the touch superimposition signal S3 can increase the touch position.
  • the touch superposition signal S3 is a touch pressure signal.
  • the touch pressure signal is generated by a first charge coupled by the second electrode (second sub-electrode 2111). It may vary depending on the amount of first charge coupled. The amount of the first charge is determined by the touch pressure, so the touch pressure information can be known by the analysis of the touch pressure signal.
  • the touch pressure information can be given, for example, by detecting whether the touch signal is superimposed with the touch pressure signal, and the touch pressure signal condition (ie, whether the output signal of the second electrode 211 / the second sub-electrode 2111 includes the touch superimposition signal S3).
  • touch location information can also be given based on the touch signal.
  • the first electrode 111 may be fabricated by a coating method or magnetron sputtering.
  • the first electrode 111 can be formed by a suitable method depending on the selected material.
  • the piezoelectric layer 112 can be fabricated by a coating method.
  • the piezoelectric layer 112 can be formed by a spin coating method, and can also be produced by other suitable methods.
  • the piezoelectric layer 112 can be fabricated in a suitable manner depending on the material selected.

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Abstract

提供一种触控面板及其驱动方法、触控装置。该触控面板包括：第一衬底基板(101)、第二衬底基板(201)、第一电极(111)、压电层(112)和第二电极(211)。第二衬底基板(201)与第一衬底基板(101)相对设置。第一电极(111)位于第一衬底基板(101)远离第二衬底基板(201)的一侧，被配置为提供参考基准。压电层(112)位于第一电极(111)和第一衬底基板(101)之间。第二电极(211)位于第一衬底基板(101)和第二衬底基板(201)之间。压电层(112)被配置为被按压时在其靠近第二电极(211)的一侧产生第一电荷(C1)，第二电极(211)被配置为在按压位置处耦合第一电荷(C1)并输出触摸信号(Sp)。可实现灵敏压力触控检测。

Description

触控面板及其驱动方法、触控装置
相关申请的交叉引用
本专利申请要求于2017年9月12日递交的中国专利申请第201710817685.2号的优先权，在此全文引用上述中国专利申请公开的内容以作为本公开的实施例的一部分。
技术领域
本公开至少一示例涉及一种触控面板及其驱动方法、触控装置。
背景技术
当前由IPhone带来的包括压力触控(Force Touch)的3D触控，及其应用越来越广泛，通过增加压力大小的检测，实现更多的触控功能，同时通过压力的大小的判断，输出不同层次的压力反馈，给消费者带来更好的触控体验。可以预测3D触控在消费电子上的应用会越来越多。
发明内容
本公开的至少一示例涉及一种触控面板及其驱动方法、触控装置。
本公开的至少一示例提供一种触控面板，包括：第一衬底基板、第二衬底基板、第一电极、压电层和第二电极。第二衬底基板与所述第一衬底基板相对设置。第一电极位于所述第一衬底基板远离所述第二衬底基板的一侧，被配置为提供参考基准。压电层位于所述第一电极和所述第一衬底基板之间。第二电极位于所述第一衬底基板和所述第二衬底基板之间。所述压电层被配置为被按压时在其靠近所述第二电极的一侧产生第一电荷，所述第二电极被配置为在按压位置处耦合所述第一电荷并输出触摸信号。
根据本公开一示例提供的触控面板，所述第一电极的材料为方块电阻大于1MΩ/□的高阻抗材料。
根据本公开一示例提供的触控面板，所述第一电极连接至参考电压端。
根据本公开一示例提供的触控面板，所述第一电极还被配置为导出静电和第二电荷至少之一，所述第二电荷为所述压电层在其被按压时产生的与所述第一电荷极性相反的电荷。
根据本公开一示例提供的触控面板，所述压电层与所述第一电极接触。
根据本公开一示例提供的触控面板，还包括导电网格电极，其中，所述导电网格电极设置在所述第一电极和所述压电层之间。
根据本公开一示例提供的触控面板，所述第二电极包括彼此绝缘的多个第二子电极，所述导电网格电极在所述第一衬底基板上的正投影和所述多个第二子电极在所述第一衬底基板上的正投影不重合。
根据本公开一示例提供的触控面板，所述导电网格电极的网格在所述第一衬底基板上的正投影在相邻第二子电极在所述第一衬底基板上的正投影之间。
根据本公开一示例提供的触控面板，所述第二电极位于所述第一衬底基板的远离所述压电层的一侧。
根据本公开一示例提供的触控面板，所述第二电极位于所述第二衬底基板的靠近所述第一衬底基板的一侧。
根据本公开一示例提供的触控面板，所述第二电极复用为显示电极。
根据本公开一示例提供的触控面板，所述第一电极的形状包括面状或网格状，所述压电层的形状包括面状或网格状。
根据本公开一示例提供的触控面板，还包括检测单元，其中，所述检测单元被配置为检测所述检测信号以获得所述触摸压力。
本公开至少一示例还提供上述任一示例提供的触控面板的驱动方法，包括：向所述第一电极输入参考信号；向所述第二电极输入触摸驱动信号，所述压电层在被按压时在其靠近所述第二电极的一侧产生第一电荷，所述第二电极在按压位置处耦合所述第一电荷，并输出所述触摸信号；对所述触摸信号进行检测以识别触摸位置和触摸压力。
根据本公开一示例提供的驱动方法，对所述触摸信号进行检测以识别触摸位置和触摸压力包括：从所述触摸信号中分解出触摸位置信号和触摸叠加信号，由所述触摸位置信号得到触摸位置，由所述触摸叠加信号得到所述触摸压力。
根据本公开一示例提供的驱动方法，分时进行触摸和显示，该驱动方法包括：在第一时间段，向所述第二电极输入显示信号；以及在第二时间段，向所述第二电极输入所述触摸驱动信号。
本公开至少一示例还提供一种触控装置，包括本公开任一示例提供的所述触控面板。
附图说明
为了更清楚地说明本公开示例的技术方案，下面将对示例的附图作简单地介绍，显而易见地，下面描述中的附图仅仅涉及本公开的一些示例，而非对本公开的限制。
图1为压电材料不受外力时的状态图；
图2为压电材料受外力作用产生压电效应的状态图；
图3A为本公开一示例提供的触控面板的剖视图；
图3B为本公开一示例提供的触控面板的剖视图；
图3C为本公开一示例提供的触控面板的剖视图；
图4为本公开一示例提供的触控面板的剖视图；
图5为本公开一示例提供的触控面板中的第一电极的俯视图；
图6为本公开一示例提供的触控面板中的第二电极的俯视图；
图7为本公开一示例提供的触控面板中的第一电极和第二电极的俯视图；
图8为本公开一示例提供的触控面板中的导电网格电极的俯视图；
图9为本公开一示例提供的触控面板中的导电网格电极和第二电极的俯视图；
图10为本公开一示例提供的触控面板中的导电网格电极和第二电极的俯视图。
具体实施方式
为使本公开示例的目的、技术方案和优点更加清楚，下面将结合本公开示例的附图，对本公开示例的技术方案进行清楚、完整地描述。显然，所描述的示例是本公开的一部分示例，而不是全部的示例。基于所描述的本公开的示例，本领域普通技术人员在无需创造性劳动的前提下所获得的所有其他示例，都属于本公开保护的范围。
除非另外定义，本公开使用的技术术语或者科学术语应当为本公开所属领域内具有一般技能的人士所理解的通常意义。本公开中使用的“第一”、“第二”以及类似的词语并不表示任何顺序、数量或者重要性，而只是用来区分不同的组成部分。同样，“包括”或者“包含”等类似的词语意指出现该词前面的元件或者物件涵盖出现在该词后面列举的元件或者物件及其等同，而不排除其他 元件或者物件。“连接”或者“相连”等类似的词语并非限定于物理的或者机械的连接，而是可以包括电性的连接，不管是直接的还是间接的。“上”、“下”、“左”、“右”等仅用于表示相对位置关系，当被描述对象的绝对位置改变后，则该相对位置关系也可能相应地改变。
图1为压电材料不受外力时的状态图。如图1所示，压电材料在不受外力时，电荷无规分布，表面不带电荷。
图2为压电材料受外力作用产生压电效应的状态图。如图2所示，压电材料在受外力作用时，产生形变，引起压电材料表面带电，压电材料一个表面带第一电荷C1，另一个与该表面相对的表面带第二电荷C2，第一电荷和第二电荷极性相反。以第一电荷C1为正电荷，第二电荷为负电荷为例进行说明，但不限于此。
本公开的示例采用了压电材料，以利于实现灵敏压力触控检测。
图3A为本公开一示例提供的触控面板的剖视图。如图3A所示，本公开至少一示例提供一种触控面板，包括：第一衬底基板101、第二衬底基板201、第一电极111、压电层112和第二电极211。第二衬底基板201与第一衬底基板101相对设置。第一电极111位于第一衬底基板101远离第二衬底基板201的一侧，并被配置为提供参考基准。压电层112位于第一电极111和第一衬底基板101之间例如，压电层112在第一衬底基板101远离第二衬底基板201的一侧。第二电极211位于第一衬底基板101和第二衬底基板201之间。例如，第二电极211位于第一衬底基板101或第二衬底基板201上，例如，第二电极211可在第二衬底基板201靠近第一衬底基板101的一侧，也可位于第一衬底基板101靠近第二衬底基板201的一侧。
例如，如图3A所示，压电层112位于第一电极111和第二电极211之间，第二电极211和压电层112在垂直于第一衬底基板101的方向上交叠。例如，第二电极211在第一衬底基板101上的正投影落入压电层112在第一衬底基板101上的正投影内。压电层112被配置为在其被按压时在其靠近第二电极211的一侧产生第一电荷，第二电极211被配置为在按压位置处耦合第一电荷并输出触摸信号以识别触摸位置和触摸压力。
例如，第二电极211可为自电容电极。如图3A所示，第二电极211可包括彼此绝缘的多个第二子电极2111。可通过第二电极211(多个第二子电极2111)的输出信号识别触摸位置。例如，第二电极211可采用透明导电金属氧 化物。透明导电金属氧化物例如包括氧化铟锡(ITO)，但不限于此。因第二电极211可耦合第一电荷，从而可使得触摸位置的输出信号(触摸信号)得到加强，从而，可以识别触摸压力。
例如，本公开的示例中，实现触控的原理为：由于人体的电场作用，当手指接触触控面板的出光一侧(例如图3A中的第一衬底基板远离第二衬底基板的一侧为出光侧)时，手指作为导体，与第二电极211(多个第二子电极2111)形成外部电容(Ce)；外部电容(Ce)和第二电极211(多个第二子电极2111)的自感电容(Cp)在第二电极211(多个第二子电极2111)与手指间形成耦合电场，将会改变自感电容(Cp)的大小。根据自感电容(Cp)的变化情况，可计算出触控点的位置，进而实现触控位置识别功能。
实现压力检测的原理为：压电层112在外力作用(按压)下，在靠近第二电极211的一侧产生第一电荷，第一电荷在第二电极211(多个第二子电极2111)与手指间形成耦合电场，将会改变自感电容(Cp)的大小。根据触控点位置自感电容的变化情况，可计算出触控点的触控压力，进而实现触控压力识别功能。例如，按压位置处的第二电极211(第二子电极211)耦合了第一电荷。例如，若压力大，则产生的第一电荷多，从而，产生的第一电荷对自感电容(Cp)的影响大，则自感电容(Cp)的变化大。即，根据自感电容(Cp)的变化程度，可以获知触摸压力大小。
例如，触摸信号因耦合的第一电荷的量的不同而不同。例如，触摸信号因耦合的第一电荷的量的增大而增大。触摸信号包括因耦合第一电荷而形成的压力信号。当耦合第一电荷时，则触摸位置处的输出信号包括压力信号(叠加信号)。当没有压力时，触摸位置处的输出信号为触摸位置处的第二电极211(第二子电极2111)的自感电容(Cp)和外部电容(Ce)叠加后的电容产生的可据其获得触摸位置的电信号。
为了实现触控压力检测功能，且结构最简化，考虑到压电材料集成到第一衬底基板101和第二衬底基板201之间需要考虑很多因素，如压电材料精细图形(pattern)化，以及压电材料对显示的影响等。为了最简化兼容实现压力触控检测功能，可将压电层112设置在第一衬底基板101和第二衬底基板201之外，以避免影响显示。
本公开至少一示例提供的触控面板，具有压力检测功能。因设置了压电层，当受到外力例如手指按压存在力度时，压电材料特性发挥作用，压电材料产生 的电荷会耦合到第二电极211上，在作为基准电极的第一电极111作用下，可读出相应的触摸信号，进而得到压力信号。触摸信号例如包括电压和/或电流信号。
本公开至少一示例提供的触控面板，结构简单，成本较低，优势明显，既能实现压力触控检测又能实现灵敏压力触控检测。
例如，第一衬底基板101和第二衬底基板201可以为玻璃基板，但不限于此，还可以采用其他绝缘材质的基板。例如，第一电极111和压电层112设置在第一衬底基板101远离第二衬底基板201的一侧。例如，压电层112可以与第一衬底基板101接触，但不限于此。例如，第二电极211和压电层112之间至少包括第一衬底基板101。
例如，压电层112采用压电材料制作，压电层112具有压电效应。压电效应是指某些介质在外力的作用下，产生形变，引起介质表面带电，这是正压电效应。
例如，压电层112材质包括有机压电材料和无机压电材料至少之一。例如，有机压电材料包括聚偏氯乙烯(PVDF)，聚偏氟乙烯压电材料等，但不限于此，例如，无机压电材料包括氮化铝，但不限于此，还可以采用其他材质的压电层。
触控可分为无压力作用和有压力作用两种情况。当无压力作用触控时，压电材料可作为绝缘材料使用。此时，可通过第二电极211输出的触摸信号(第二电极211没有耦合第一电荷的情况，触摸信号不包括压力信号)获知触摸位置。例如，当有压力作用触控时，可通过第二电极211输出的叠加压力信号后的触摸信号(第二电极211耦合第一电荷的情况，触摸信号包括压力信号)获知触摸位置和触摸压力。
因有耦合电荷和没有耦合电荷的情况下，第二电极211输出的信号不同，从而，可分辨是否有触摸压力。因耦合电荷量的不同，可分辨触摸压力的大小。例如，可通过算法根据第二电极211输出的触摸信号而确定触摸位置和触摸压力。
如图3A所示，触控面板还可包括检测单元222，检测单元222可设置在第二衬底基板201上，检测单元222被配置为检测第二电极211输出的触摸信号以检测触摸压力。检测单元222例如包括检测电路(检测IC)。例如，多个第二子电极2111可分别与检测单元222电连接。
如图3A所示，根据本公开一示例提供的触控面板，压电层112与第一电 极111电连接，但不限于此，也可以彼此绝缘。例如，压电层112与第一电极111接触。从而，可利于压电层112在靠近第一衬底基板101的一侧表面形成的第一电荷耦合至第二电极211/第二子电极2111。
根据本公开一示例提供的触控面板，第一电极111还被配置为导出静电和第二电荷至少之一，第二电荷为压电层112在其被按压时产生的与第一电荷极性相反的电荷。
如图3A所示，根据本公开一示例提供的触控面板，第二电极211与压电层112之间有间隔，至少包括第一衬底基板101。如图3A所示，第二电极211位于第二衬底基板201的靠近第一衬底基板101的一侧。如图3A所示，第二电极211位于第二衬底基板201上。例如，第二电极211可利用显示面板中的电极复用而成，例如，可利用显示面板中的公共电极复用为第二电极211，但不限于此。例如，公共电极可为液晶显示面板中与像素电极产生电场以驱动液晶旋转的电极，第二衬底基板201可以是阵列基板，第一衬底基板101可以是对向基板，例如彩膜基板，但不限于此。例如，公共电极可为有机发光二极管(OLED)显示面板中显示用的阴极。触控面板为有机发光二极管显示面板时，第一衬底基板101可以为封装基板，第二衬底基板201可以是阵列基板，阵列基板可包括薄膜晶体管、与薄膜晶体管的漏极电连接的阳极、阴极、以及位于阳极和阴极之间的有机材料功能层。
如图3A所示，根据本公开一示例提供的触控面板，第一电极111连接至参考电压端，参考电压端例如为接地端，本公开的示例以接地为例进行说明。例如，第一电极111可通过银浆连接至参考电压端。第一电极111接地可防止外界静电对触控面板的影响，外界静电会被第一电极111导入接地点，从而保护显示屏不受到外界静电的影响。例如，参考电压端可位于第二衬底基板201上。由于第一电极111采用高阻材料，高阻材料阻值在M欧姆级别左右，所以触控信号不会受到屏蔽影响。
如图3A所示，根据本公开一示例提供的触控面板，第一电极111的材料为高阻抗材料，方块电阻大于1MΩ/□(Ω/sq)的材料可为高阻抗材料。例如，方块电阻是导电材料单位厚度单位面积上的电阻值。例如，方块电阻是指电阻率与材料厚度的比值。由于高阻材料阻值较高，所以触控信号不会受到屏蔽影响，同时外界静电会被高阻材料导入参考电压端例如接地点，从而保护触控面板不受到外界静电的影响。例如，第一电极111的材料可在导电材料(导电主 体)中掺杂绝缘粒子，形成绝缘粒子掺杂的导电材料，以利于达到需要的阻抗。导电主体例如包括聚乙烯二氧噻吩(PEDOT)和透明导电金属氧化物。透明导电金属氧化物例如包括氧化铟锡(ITO)，但不限于此。绝缘粒子例如包括氧化硅和氮氧化硅至少之一。例如，第一电极111的材料包括绝缘粒子氧化硅掺杂的聚乙烯二氧噻吩(PEDOT)，但不限于此。高阻抗材料阻值虽高，也具有导电性，以利于提供固定电位和/或电荷导出。例如，第一电极111可采用透明材料，以利于提高透过率。例如，第一电极111可采用透明导电高阻抗材料。
图3B为本公开一示例提供的触控面板的剖视图。如图3B所示，第一衬底基板101和第二衬底基板201相对设置形成盒。第一衬底基板101和第二衬底基板201可通过封框胶123粘结在一起。盒内设置液晶层124。本公开的示例以触控液晶显示面板为例进行说明，但不限于此，还可以为其他显示面板，例如有机发光二极管显示面板等。
例如，图3B中还示出了第一偏光板102和第二偏光板202。例如，压电层112可设置在第二偏光板202远离第一衬底基板101的一侧，但不限于此。压电层112还可以设置在第一衬底基板101和第一偏光板102之间。
如图3B所示，根据本公开一示例提供的触控面板/触控显示面板，为了实现彩色显示，还可包括黑矩阵103和彩膜层104。图3B中还示出了背光源301以提供背光。
图3C为本公开一示例提供的触控面板的剖视图。如图3C所示，第二电极211位于第一衬底基板101的远离压电层112的一侧。压电层112和第二电极211位于第一衬底基板101的相反侧。
图4为本公开一示例提供的触控面板的剖视图。如图4所示，根据本公开一示例提供的触控面板，为了使得第一电极111更好的实现固定电极(电位固定)的作用，且信号均一稳定，触控面板还包括导电网格电极113，导电网格电极113可设置在第一电极111和压电层112之间。例如，导电网格电极113材质包括透明导电材料，例如，包括石墨烯或者纳米银等。
如图4所示，根据本公开一示例提供的触控面板，为了不影响触控，导电网格电极113和多个第二子电极2111在垂直于第一衬底基板101的方向上不重合。例如，导电网格电极113在第一衬底基板101上的正投影和多个第二子电极2111在第一衬底基板101上的正投影不重合。例如，导电网格电极113在第一衬底基板101上的正投影与多个第二子电极2111在第一衬底基板101 上的正投影不重合。例如，不重合是指不具有重叠面积。例如，各第二子电极2111可单独引出以利于信号输出，但不限于此。
如图4所示，根据本公开一示例提供的触控面板，导电网格电极113的网格1131在相邻第二子电极2111之间。例如，导电网格电极113的网格1131位于第二子电极2111的间隙位置。例如，导电网格电极113可与第一电极111电连接。例如，导电网格电极113可与第一电极111接触。例如，导电网格电极113可与压电层112接触，可以整面防止外界静电，且不影响触控效果，且能实现更好的压力触控检测。
图5为本公开一示例提供的触控面板中的第一电极的俯视图。图5示出了面状的第一电极111，但本公开的示例中，第一电极111的形状不限于此，还可以为网格状等其他形状。网格状的第一电极111可参照导电网格电极113的形状，但不限于此。
需要说明的是，本公开的示例中，第一电极111也可包括彼此绝缘的多个第一子电极。例如，多个第一子电极与多个第二子电极彼此绝缘且交叉设置，也可实现触摸位置和/或触摸压力的检测。
图6为本公开一示例提供的触控面板中的第二电极的俯视图。图6示出了一种第二电极211的图形，包括彼此绝缘的多个第二子电极2111。多个第二子电极2111可呈阵列排布。
图7示出了第一电极111和第二电极211的俯视示意图。例如，在俯视图中，第一电极111和第二电极211在第二电极211的图形处重叠。例如，在俯视图中，第一电极111和第二电极211在各第二子电极2111的图形处重叠。
图8示出了一种导电网格电极113的俯视示意图。
图9示出了一种导电网格电极113与彼此绝缘的多个第二子电极2111之间的俯视示意图。导电网格电极113的网格1131位于相邻第二子电极2111间隙内，且在俯视图上，第二子电极2111的间隙被导电网格电极113完全填满。
例如，如图9所示，导电网格电极113在第一衬底基板101上的投影和多个第二子电极2111在第一衬底基板101上的投影不重合。
图10示出了一种导电网格电极113与彼此绝缘的多个第二子电极2111之间的俯视示意图。图10中，导电网格电极113的网格1131位于相邻第二子电极2111间隙内。例如，第二子电极2111和导电网格电极113的网格1131之间具有间隔213。
根据本公开一示例提供的触控面板，第一电极111的形状包括面状或网格状，压电层112的形状包括面状或网格状。
本公开至少一示例提供一种触控装置，包括上述任一触控面板。例如，触控装置包括触控显示装置。例如，触控显示装置包括液晶显示装置或有机发光二极管显示装置等，但不限于此。
本公开至少一示例提供上述任一示例提供的触控面板的驱动方法，包括：向第一电极111输入参考信号，参考信号例如包括参考电压；向第二电极211(多个第二子电极2111)输入触摸驱动信号，第二电极在按压位置处(按压位置处的第二子电极2111)耦合第一电荷，并输出触摸信号；以及对触摸信号进行检测以识别触摸位置和触摸压力。此情况下，多个第二子电极2111为自电容电极，触摸信号包括触摸位置和触摸压力双重信息，从而可在识别触摸压力的同时识别触摸位置。当多个第二子电极2111不为自电容电极时，可仅输出触摸压力信号，仅识别触摸压力。当然，本公开的示例中，多个第二子电极2111也可不为自电容电极，例如，还可采用互电容的模式实现触摸位置和触摸压力的检测。
本公开至少一示例提供的触控面板的驱动方法，根据第二电极211(多个第二子电极2111)的输出信号，即可同时获知触摸位置和触摸压力。
例如，触摸驱动信号可为交流信号，例如，可为交流电压信号，但不限于此。
根据本公开至少一示例提供的驱动方法，对触摸信号进行检测以识别触摸位置和所述触摸压力包括：从触摸信号中分解出触摸位置信号和触摸叠加信号，由触摸位置信号得到触摸位置，由触摸叠加信号得到触摸压力(压力大小)。
根据本公开至少一示例提供的驱动方法，当第二电极复用为显示用的公共电极时，可分时进行触摸和显示，该驱动方法包括：在第一时间段，向第二电极211输入显示信号；在第二时间段，向第二电极211输入触摸驱动信号。
例如，第一时间段为显示时间段，第二时间段为触摸时间段。显示时间段，除了向第二电极211输入显示信号外，还可配合为了进行显示的其他操作，例如，向像素电极输入数据信号。
例如，多个第二子电极2111输出触摸信号；未触摸位置处的第二子电极2111输出触摸基准信号S1，触摸位置处的第二子电极2111输出触摸位置信号S2，因触摸位置信号S2不同于触摸基准信号S1，从而可识别出触摸位置。而 当触摸带有压力时，即按压时，触摸位置处的第二电极(第二子电极2111)输出的触摸信号Sp包括触摸位置信号S2和触摸叠加信号S3，触摸叠加信号S3可增加触摸位置信号S2的变化趋势，即，若S2小于S1，则触摸位置信号S2和触摸叠加信号S3之和更小于触摸基准信号S1，若S2大于S1，则触摸位置信号S2和触摸叠加信号S3之和更加大于触摸基准信号S1。触摸叠加信号S3即为触摸压力信号。触摸压力信号由第二电极(第二子电极2111)耦合的第一电荷产生。可依据耦合的第一电荷量的不同而不同。第一电荷量的多少由触控压力而定，故而，通过触摸压力信号的分析可以获知触控压力信息。
例如，通过检测触摸信号是否叠加了触摸压力信号，以及触摸压力信号情况(即，第二电极211/第二子电极2111的输出信号是否包括触摸叠加信号S3)，可给出触摸压力信息。例如，还可根据触摸信号给出触摸位置信息。
例如，第一电极111可采用涂覆方法或磁控溅射制作。可依据选择的材料采用适合的方法制作第一电极111。
例如，压电层112可采用涂覆方法制作。例如旋涂方法制作压电层112，也可采用其他适合的方法制作。可依据选择的材料采用适合的方法制作压电层112。
需要说明的是，为了清晰起见，在用于描述本公开的示例的附图中，层或区域的厚度被放大。可以理解，当诸如层、膜、区域或基板之类的元件被称作位于另一元件“上”或“下”时，该元件可以“直接”位于另一元件“上”或“下”，或者可以存在中间元件。
并且，在不冲突的情况下，本公开的同一示例及不同示例中的特征可以相互组合。
以上所述，仅为本公开的具体实施方式，但本公开的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本公开揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本公开的保护范围之内。因此，本公开的保护范围应以所述权利要求的保护范围为准。

Claims (17)

  1. 一种触控面板，包括：
    第一衬底基板；
    第二衬底基板，与所述第一衬底基板相对设置；
    第一电极，位于所述第一衬底基板远离所述第二衬底基板的一侧，被配置为提供参考基准；
    压电层，位于所述第一电极和所述第一衬底基板之间；
    第二电极，位于所述第一衬底基板和所述第二衬底基板之间；
    其中，所述压电层被配置为被按压时在其靠近所述第二电极的一侧产生第一电荷，所述第二电极被配置为在按压位置处耦合所述第一电荷并输出触摸信号。
  2. 根据权利要求1所述的触控面板，其中，所述第一电极的材料为方块电阻大于1MΩ/□的高阻抗材料。
  3. 根据权利要求1或2所述的触控面板，其中，所述第一电极连接至参考电压端。
  4. 根据权利要求1-3任一项所述的触控面板，其中，所述第一电极还被配置为导出静电和第二电荷至少之一，所述第二电荷为所述压电层在其被按压时产生的与所述第一电荷极性相反的电荷。
  5. 根据权利要求1-4任一项所述的触控面板，其中，所述压电层与所述第一电极接触。
  6. 根据权利要求1-5任一项所述的触控面板，还包括导电网格电极，其中，所述导电网格电极设置在所述第一电极和所述压电层之间。
  7. 根据权利要求6所述的触控面板，其中，所述第二电极包括彼此绝缘的多个第二子电极，所述导电网格电极在所述第一衬底基板上的正投影和所述多个第二子电极在所述第一衬底基板上的正投影不重合。
  8. 根据权利要求7所述的触控面板，其中，所述导电网格电极的网格在所述第一衬底基板上的正投影在相邻第二子电极在所述第一衬底基板上的正投影之间。
  9. 根据权利要求1-8任一项所述的触控面板，其中，所述第二电极位于所述第一衬底基板的远离所述压电层的一侧。
  10. 根据权利要求1-8任一项所述的触控面板，其中，所述第二电极位于所述第二衬底基板的靠近所述第一衬底基板的一侧。
  11. 根据权利要求1-10任一项所述的触控面板，其中，所述第二电极复用为显示电极。
  12. 根据权利要求1-11任一项所述的触控面板，其中，所述第一电极的形状包括面状或网格状，所述压电层的形状包括面状或网格状。
  13. 根据权利要求1-12任一项所述的触控面板，还包括检测单元，其中，所述检测单元被配置为检测所述触摸信号以获得触摸压力。
  14. 权利要求1-13任一项所述的触控面板的驱动方法，包括：
    向所述第一电极输入参考信号；
    向所述第二电极输入触摸驱动信号，所述压电层在被按压时在其靠近所述第二电极的一侧产生第一电荷，所述第二电极在按压位置处耦合所述第一电荷，并输出所述触摸信号；
    对所述触摸信号进行检测以识别触摸位置和触摸压力。
  15. 根据权利要求14所述的触控面板的驱动方法，对所述触摸信号进行检测以识别触摸位置和触摸压力包括：从所述触摸信号中分解出触摸位置信号和触摸叠加信号，由所述触摸位置信号得到触摸位置，由所述触摸叠加信号得到所述触摸压力。
  16. 权利要求11所述的触控面板的驱动方法，分时进行触摸和显示，该驱动方法包括：
    在第一时间段，向所述第二电极输入显示信号；
    在第二时间段，向所述第二电极输入所述触摸驱动信号。
  17. 一种触控装置，包括权利要求1-13任一项所述的触控面板。
PCT/CN2018/100837 2017-09-12 2018-08-16 触控面板及其驱动方法、触控装置 WO2019052304A1 (zh)

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US11347348B2 (en) 2022-05-31
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