CN112732114A - Touch panel, driving method of touch panel and display device - Google Patents
Touch panel, driving method of touch panel and display device Download PDFInfo
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- CN112732114A CN112732114A CN202011601560.4A CN202011601560A CN112732114A CN 112732114 A CN112732114 A CN 112732114A CN 202011601560 A CN202011601560 A CN 202011601560A CN 112732114 A CN112732114 A CN 112732114A
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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
- G06F3/042—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means
- G06F3/0425—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means using a single imaging device like a video camera for tracking the absolute position of a single or a plurality of objects with respect to an imaged reference surface, e.g. video camera imaging a display or a projection screen, a table or a wall surface, on which a computer generated image is displayed or projected
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0416—Control or interface arrangements specially adapted for digitisers
Abstract
The invention discloses a touch panel, a driving method of the touch panel and a display device, wherein the touch panel comprises: a substrate; the touch control electrodes are insulated from each other and at least arranged on one side of the substrate; the edge routing lines are respectively connected with the touch electrodes, each edge routing line is arranged on the substrate and arranged on the same layer with the touch electrodes, and the orthographic projections of at least part of the edge routing lines on the substrate are distributed around the peripheral sides of the orthographic projections of the touch electrodes on the substrate; the suspension electrodes are insulated from each other, each suspension electrode is arranged on one side of the edge wiring away from the substrate, the orthographic projection of each suspension electrode on the substrate at least partially covers the orthographic projection of the edge wiring on the substrate, and the suspension electrodes and the edge wiring are arranged in an insulating mode. The floating electrodes are arranged above the edge wiring, so that the space above the edge wiring is effectively utilized, the frame width of the touch panel is effectively reduced, and the touch area of the touch panel is increased.
Description
Technical Field
The invention belongs to the technical field of electronic products, and particularly relates to a touch panel, a driving method of the touch panel and a display device.
Background
With the development of intelligent terminals, touch technologies gradually become mainstream human-computer interaction control modes, and with the increasing functions of touch electronic products, touch operation modes of directly touching a screen gradually fail to meet the requirements of use and operation.
In recent years, a floating touch operation has been developed, in which a user can perform the operation while approaching the touch panel but not touching the touch panel. The existing floating touch design needs to additionally arrange a layer of floating touch panel on the display panel, which results in the increase of the thickness of the product, or the floating touch electrode is designed in the peripheral area of the existing touch electrode and the wiring thereof, which results in the very wide frame of the screen, increases the cost and affects the user experience of pursuing an ultrathin and small-sized display device.
Therefore, a new touch panel, a driving method of the touch panel and a display device are needed.
Disclosure of Invention
Embodiments of the present invention provide a touch panel, a driving method of the touch panel, and a display device, in which a floating electrode is disposed above an edge trace, so as to effectively utilize a space above the edge trace, effectively reduce a frame width of the touch panel, and increase a touch area of the touch panel.
In a first aspect, an embodiment of the present invention provides a touch panel, including: a substrate; the touch control electrodes are insulated from each other and at least arranged on one side of the substrate; the edge routing lines are respectively connected with the touch electrodes, each edge routing line is arranged on the substrate and arranged on the same layer with the touch electrodes, and the orthographic projections of at least part of the edge routing lines on the substrate are distributed around the peripheral sides of the orthographic projections of the touch electrodes on the substrate; the suspension electrodes are insulated from each other, each suspension electrode is arranged on one side of the edge wiring away from the substrate, the orthographic projection of each suspension electrode on the substrate at least partially covers the orthographic projection of the edge wiring on the substrate, and the suspension electrodes and the edge wiring are arranged in an insulating mode.
In a second aspect, an embodiment of the present invention provides a driving method of a touch panel, which is applied to the touch panel in any of the above embodiments, and the driving method includes: judging the working mode of the touch panel according to the instruction; when the working mode of the touch panel is in a plane touch detection stage, inputting a plane touch voltage to the touch electrode; when the working mode of the touch panel is in a suspension touch detection stage, inputting a suspension touch voltage to the touch electrode so that the touch electrode and the suspension electrode form a suspension electrode pair; the floating touch voltage is greater than the planar touch voltage.
In a third aspect, an embodiment of the present invention provides a display device, including: a touch panel, which is the touch panel in any of the above embodiments.
Compared with the related art, the touch panel provided by the embodiment of the invention comprises a substrate, touch electrodes, edge traces and floating electrodes, wherein each edge trace is respectively connected with each touch electrode and is used for inputting a planar touch signal to the touch electrodes, the planar touch signal can be in a voltage or current form, in order to avoid interference between the edge trace and the touch electrodes or other components, orthographic projections of at least part of the edge traces on the substrate are distributed around the peripheral sides of orthographic projections of the touch electrodes on the substrate, a plurality of floating electrodes are arranged on one sides of the edge traces, which are away from the substrate, orthographic projections of the floating electrodes on the substrate at least partially cover orthographic projections of the edge traces on the substrate, namely the floating electrodes are arranged above the edge traces, the space above the edge traces is effectively utilized, and the edge traces and the floating electrodes are both arranged in the edge space of the touch panel, the width of the frame of the touch panel is effectively reduced, and the touch area of the touch panel is increased.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments of the present invention will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a touch panel according to an embodiment of the invention;
FIG. 2 is a top view of a touch panel according to an embodiment of the invention;
FIG. 3 is a view of a membrane layer at A-A in FIG. 2;
fig. 4 is a schematic diagram of an electric field of a touch panel according to an embodiment of the invention;
FIG. 5 is a top view block diagram of FIG. 4 in accordance with one embodiment of the present invention;
fig. 6 is a film structure diagram of a touch panel according to another embodiment of the invention;
fig. 7 is a film structure diagram of a touch panel according to another embodiment of the invention;
FIG. 8 is a top view of a touch panel according to another embodiment of the invention;
FIG. 9 is a view of a membrane layer at B-B in FIG. 8;
FIG. 10 is a view of a further film layer at B-B in FIG. 8;
fig. 11 is a signal timing diagram of a driving method of a touch panel according to an embodiment of the invention.
Detailed Description
Features and exemplary embodiments of various aspects of the present invention will be described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present invention by illustrating examples of the present invention.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
For better understanding of the present invention, the touch panel, the driving method of the touch panel and the display device according to the embodiments of the present invention are described in detail below with reference to fig. 1 to 11.
Referring to fig. 1 to 3 together, fig. 1 is a schematic structural diagram of a touch panel according to an embodiment of the invention, fig. 2 is a top view of the touch panel according to the embodiment of the invention, and fig. 3 is a structural diagram of a film layer at a-a in fig. 2; an embodiment of the present invention provides a touch panel, including: a substrate 1; a plurality of touch electrodes 2 insulated from each other, at least arranged on one side of the substrate 1; the edge wires 3 are respectively connected with the touch electrodes 2, each edge wire 3 is arranged on the substrate 1 and is arranged on the same layer as the touch electrodes 2, and the orthographic projections of at least part of the edge wires 3 on the substrate 1 are distributed around the peripheral sides of the orthographic projections of the touch electrodes 2 on the substrate 1; a plurality of suspension electrodes 4 that are insulating each other, each suspension electrode 4 is located the edge and is walked one side that 3 deviates from base plate 1, and the orthographic projection of each suspension electrode 4 on base plate 1 at least partially covers the orthographic projection of edge on base plate 1 of 3, and suspension electrode 4 and edge are walked 3 insulating settings.
The touch panel provided by the embodiment of the invention comprises a substrate 1, touch electrodes 2, edge traces 3 and floating electrodes 4, wherein each edge trace 3 is respectively connected with each touch electrode 2 and is used for inputting a planar touch signal to the touch electrodes 2, the planar touch signal can be specifically in a voltage or current form, in order to avoid interference between the edge trace 3 and the touch electrodes 2 or other components, the orthographic projection of at least part of the edge traces 3 on the substrate 1 is distributed around the peripheral side of the orthographic projection of the touch electrodes 2 on the substrate 1, and a plurality of floating electrodes 4 are arranged on one side of the edge trace 3, which is far away from the substrate 1, the orthographic projection of each floating electrode 4 on the substrate 1 at least partially covers the orthographic projection of the edge trace 3 on the substrate 1, namely the floating electrodes 4 are arranged above the edge traces 3, so that the space above the edge traces 3 is effectively utilized, the edge wiring 3 and the floating electrode 4 are both arranged in the edge space of the touch panel, so that the frame width of the touch panel is effectively reduced, and the touch area of the touch panel is increased.
It should be noted that each touch electrode 2 may adopt a self-capacitance or mutual capacitance electrode form, and specifically, when the touch electrode 2 is a self-capacitance electrode, it is used as both a touch driving electrode and a touch sensing electrode. Each touch electrode 2 is connected to a control chip (not shown in the figure) through an edge wire 3, and the edge wire 3 is used for sending a touch driving signal sent by the control chip to each touch electrode 2 and transmitting a touch sensing signal generated by the touch electrode 2 back to the control chip through the edge wire 3.
The touch electrode 2 may also be in the form of a mutual capacitance electrode, that is, the touch electrode 2 includes a plurality of touch driving electrode blocks 21 and a plurality of touch sensing electrode blocks 22, the touch driving electrode blocks 21 and the touch sensing electrode blocks 22 are insulated from each other, the plurality of touch driving electrode blocks 21 are arranged along a first direction Y, the plurality of touch sensing electrode blocks 22 are arranged along a second direction X, and the first direction Y and the second direction X intersect each other.
The control chip sends a touch driving signal to the touch driving electrode block 21 in the touch electrode 2 through one edge wire 3, and transmits a touch sensing signal generated by the touch sensing electrode block 22 forming a mutual capacitance electrode pair with the touch driving electrode block 21 back to the control chip through the other edge wire 3, and at the moment, the touch position in the horizontal coordinate is determined by detecting the capacitance change between the touch driving electrode block 21 and the touch sensing electrode block 22.
Referring to fig. 4, fig. 4 is an electric field schematic diagram of a touch panel according to an embodiment of the present invention, a stable electric field can be formed in a space above a touch-enabled area of the touch panel by the powered floating electrode 4, when a conductor such as a hand enters the electric field, the distribution of electric field lines at the position of the conductor is changed, so as to change an electric field intensity received by the floating electrode 4 connected to the position, and when the conductor moves in the electric field, the floating touch of the touch panel, that is, the touch sensing in a direction perpendicular to the plane of the substrate 1, can be realized by recording the changed direction and strength of the electric field.
It can be understood that, in order to avoid short circuit or signal interference between the floating electrode 4 and the edge trace 3, which affects the normal operation of the touch panel, the floating electrode 4 and the edge trace 3 need to be insulated.
Referring to fig. 3 or fig. 4, in some alternative embodiments, at least one signal shielding layer 5 is disposed between the floating electrode 4 and the edge trace 3, and an orthogonal projection of the signal shielding layer 5 on the substrate 1 covers an orthogonal projection of the edge trace 3 on the substrate 1.
It should be noted that, because the edge trace 3 needs to transmit a planar touch signal to the touch electrode 2, the signal between the edge trace 3 and the floating electrode 4 can be shielded by arranging the signal shielding layer 5, and the signal shielding layer 5 may specifically adopt a metal shielding layer, so that the signal shielding effect is good. The orthographic projection of the signal shielding layer 5 on the substrate 1 covers the orthographic projection of the edge wiring 3 on the substrate 1, namely the orthographic projection area of the signal shielding layer 5 is equal to or larger than that of the edge wiring 3, and the signal interference caused by the coupling capacitance between the edge wiring 3 and the floating electrode 4 to the floating electrode 4 can be completely shielded, so that the floating touch sensitivity is improved.
Referring to fig. 3, in order to avoid the short circuit between the floating electrode 4 and the edge trace 3, a first insulating layer 6 may be further disposed between the floating electrode 4 and the edge trace 3, and in some alternative embodiments, the first insulating layer 6 is disposed between the signal shielding layer 5 and the floating electrode 4; and/or a second insulating layer 7 is arranged between the signal shielding layer 5 and the edge trace 3.
It is understood that, since the signal shielding layer 5 is usually made of a conductive material such as metal, a first insulating layer 6 may be disposed between the signal shielding layer 5 and the floating electrode 4 or a second insulating layer 7 may be disposed between the signal shielding layer 5 and the edge trace 3, and the position of the insulating layer is not particularly limited as long as the floating electrode 4 and the edge trace 3 can be insulated from each other. Specifically, the first insulating layer 6 and the second insulating layer 7 may be made of an inorganic material such as silicon nitride or silicon oxide.
Referring to fig. 5, fig. 5 is a top view structural diagram of fig. 4 according to an embodiment of the present invention, in order to prevent a planar touch signal transmitted from the edge trace 3 to the touch electrode 2 from being interfered by a floating touch signal of the floating electrode 4, in some alternative embodiments, a minimum distance h between an orthographic projection of the signal shielding layer 5 on the substrate 1 and an orthographic projection of the touch electrode 2 on the substrate 1 is greater than or equal to 0.5 mm.
It can be understood that the minimum distance h is the distance between the outer edge profile of the orthographic projection of the touch electrode 2 on the substrate 1 and the outer edge profile of the signal shielding layer 5 when the distance is closest. The distance between the touch electrode 2 and the floating electrode 4 is indirectly limited by limiting the minimum distance between the touch electrode 2 and the signal shielding layer 5, and the influence on the touch precision of the touch panel caused by the shielding of the plane touch signal by the floating electrode 4 due to the too close distance between the touch electrode 2 and the floating electrode 4 is avoided.
Referring to fig. 5, in some alternative embodiments, an edge of the orthographic projection of the signal shielding layer 5 on the substrate 1 near the touch electrode 2 is a first edge, an edge of the orthographic projection of the floating electrode 4 on the substrate 1 near the touch electrode 2 is a second edge, and a distance d between the first edge and the second edge is greater than or equal to 0.2 mm.
It should be noted that the signal shielding layer 5 needs to cover the floating electrode 4, and in this embodiment, an edge of an orthographic projection of the signal shielding layer 5 on the substrate 1, which is close to the touch electrode 2, is a first edge, an edge of an orthographic projection of the floating electrode 4 on the substrate 1, which is close to the touch electrode 2, is a second edge, and a distance d between the first edge and the second edge is greater than or equal to 0.2mm, that is, the first edge is closer to the touch electrode 2 than the second edge; optionally, an orthographic projection area of the signal shielding layer 5 is slightly larger than an orthographic projection area of the floating electrode 4, so as to completely shield signal interference of the edge routing 3 on the floating electrode 4, and improve the floating touch sensitivity.
Referring to fig. 3, fig. 6 and fig. 7, fig. 6 is a film layer structure diagram of a touch panel according to another embodiment of the present invention, fig. 7 is a film layer structure diagram of a touch panel according to another embodiment of the present invention, in order to effectively fix the floating electrode 4, in some alternative embodiments, a cover plate 8 is disposed on a side of the floating electrode 4 away from the substrate 1, and a connection glue layer 9 is disposed between the cover plate 8 and the floating electrode 4; and/or a connecting glue layer 9 is arranged between the suspension electrode 4 and the substrate 1.
Specifically, referring to fig. 3, a connecting glue layer 9 may be only disposed between the cover plate 8 and the floating electrode 4 to fix the floating electrode 4 on the cover plate 8; referring to fig. 6 and 7, a connection glue layer 9 may be disposed only between the floating electrode 4 and the substrate 1, and the floating electrode 4 is fixed on a side close to the substrate 1 through the connection glue layer 9.
Optionally, a connecting glue layer 9 may also be disposed between the cover plate 8 and the floating electrode 4 and between the floating electrode 4 and the substrate 1, so as to further improve the stability of fixing the floating electrode 4.
With reference to fig. 6 and 7, in some optional embodiments, the touch panel further includes a flexible circuit board F, the flexible circuit board F and the floating electrode 4 are disposed in the same layer, and the floating electrode 4 is electrically connected to the flexible circuit board F.
Specifically, flexible circuit board F can set up the surface that is equipped with suspension electrode 4 one side at apron 8, and suspension electrode 4 walks line and flexible circuit board F through the suspension and connects, and flexible circuit board F is connected with control chip again, reduces the wiring length of walking the line of suspension, improves the signal transmission stability of suspension electrode 4.
Referring to fig. 4, in order to reduce the space occupied by the floating electrode 4, in some optional embodiments, when the touch panel is in the floating touch detection stage, the touch driving electrode block 21 is configured as a driving electrode of the floating electrode 4, and forms a floating electrode pair with the floating electrode 4.
As shown in fig. 4, the direction of the electric field lines between the touch driving electrode block 21 and the floating electrode 4 is from the touch driving electrode block 21 and finally points to the floating electrode 4. The electric field formed by the edge wire 3 is blocked by the signal shielding layer 5, so as to avoid interference to the electric field between the touch driving electrode block 21 and the floating electrode 4.
When a conductor, such as a hand, enters an electric field between the touch driving electrode block 21 and the floating electrode 4, the distribution of electric field lines at the position of the conductor is changed, so as to change the intensity of the electric field received by the floating electrode 4 connected to the position, and when the conductor moves in the electric field, the floating touch can be realized by recording the changed direction and intensity of the electric field.
It should be noted that the touch driving electrode block 21 is configured as a driving electrode of the floating electrode 4, that is, the floating electrode 4 and the touch sensing electrode block 22 share the touch driving electrode block 21 in a time-sharing manner, the floating electrode 4 serves as a receiving electrode to receive an electrical signal of the touch driving electrode block 21, and when the touch panel is in a planar touch detection stage, the touch driving electrode block 21 and the touch sensing electrode block 22 are mutually matched to realize a planar touch function of the touch panel; when the touch panel is in a suspension touch detection stage, the suspension electrode pair formed by the touch driving electrode block 21 and the suspension electrode 4 realizes the suspension touch function of the touch panel, and the driving electrode of the suspension electrode 4 is not needed to be additionally arranged, so that the space of the touch panel is saved, and the space utilization rate of the touch panel is improved.
Optionally, the floating electrode 4 may also adopt a self-capacitance form, that is, the floating electrode 4 can not only receive the floating touch driving signal of the control chip, but also return the floating touch sensing signal to the control chip, and the floating electrode pair does not need to be formed with the touch driving electrode block 21, so that the floating touch function of the touch panel can be realized.
Referring to fig. 8 and 9, fig. 8 is a top view of a touch panel according to another embodiment of the invention, fig. 9 is a structure diagram of a film layer at B-B in fig. 8, in order to facilitate driving of the floating electrode 4 by the touch driving electrode block 21, in some alternative embodiments, the touch panel further includes a cover plate 8, the touch sensing electrode block 22 is disposed on a side of the substrate 1 close to the cover plate 8, the touch driving electrode block 21 is disposed on a side of the substrate 1 away from the cover plate 8, and an orthographic projection of the touch driving electrode block 21 on the substrate 1 and an orthographic projection of the floating electrode 4 on the substrate 1 at least partially overlap.
It should be noted that the touch driving electrode block 21 and the touch sensing electrode are respectively disposed on two sides of the substrate 1, and an orthographic projection of the touch driving electrode block 21 on the substrate 1 and an orthographic projection of the floating electrode 4 on the substrate 1 are at least partially overlapped, that is, the touch driving electrode block 21 is not only disposed in the middle of the touch panel, but also extends to an edge area where the floating electrode 4 and the edge wire 3 are disposed on the touch panel, that is, the touch driving electrode block 21 is directly disposed below the floating electrode 4, so as to send an electrical signal to the floating electrode 4, and the floating electrode 4 forms a floating electrode pair, thereby implementing a floating touch function of the touch panel. Optionally, the floating electrode 4 is stacked above the touch sensing electrode block 22, and a conductive shielding layer is disposed between the layer of the floating electrode 4 and the touch sensing electrode block 22. Specifically, the signal shielding layer 5 covers the side of the touch driving electrode block 21 close to the cover plate 8.
Referring to fig. 10, fig. 10 is a diagram of another film structure at B-B in fig. 8, in some alternative embodiments, the substrate 1 may have a double-layer structure, specifically, the substrate 1 includes a first substrate 11 and a second substrate 12 stacked in sequence along a direction perpendicular to a plane where the floating electrode 4 is located, the first substrate 11 is located on a side of the second substrate 12 away from the floating electrode 4, a touch driving electrode block 21 is disposed between the first substrate 11 and the second substrate 12, and an edge trace 3 is disposed on a side of the second substrate 12 away from the touch driving electrode block 21.
It can be understood that the substrate 1 includes the first substrate 11 and the second substrate 12 which are stacked, and the touch driving electrode block 21 is disposed between the first substrate 11 and the second substrate 12, which can effectively prevent the touch driving electrode block 21 from interfering with other components or traces, such as the edge trace 3. The edge wiring 3 is arranged on one side, away from the touch driving electrode block 21, of the second substrate 12, the floating electrode 4 is also arranged on one side, away from the touch driving electrode block 21, of the second substrate 12, and the floating touch function of the touch panel is achieved through the cooperation of the touch driving electrode block 21 and the floating electrode 4. Optionally, a signal shielding layer 5 is disposed on one side of the touch driving electrode block 21 away from the first substrate 11 or one side of the edge trace 3 away from the first substrate 11.
An embodiment of the present invention further provides a driving method of a touch panel, which is applied to the touch panel in any of the above embodiments, and the driving method includes:
judging the working mode of the touch panel according to the instruction;
when the working mode of the touch panel is in the plane touch detection stage, inputting a plane touch voltage to the touch electrode 2;
when the working mode of the touch panel is in a suspension touch detection stage, inputting a suspension touch voltage to the touch electrode 2 so that the touch electrode 2 and the suspension electrode 4 form a suspension electrode pair;
the floating touch voltage is greater than the planar touch voltage.
It should be noted that, when the operating mode of the touch panel is in the plane touch detection stage, a plane touch voltage is input to the touch electrode 2, so that the touch electrode 2 determines a touch position in a plane, for example, in a horizontal coordinate; when the working mode of the touch panel is in the suspension touch detection stage, a suspension touch voltage is input to the touch electrode 2, and the touch electrode 2 and the suspension electrode 4 form a suspension electrode pair, so that the suspension touch function of the touch panel is realized.
According to the driving method of the touch panel provided by the embodiment of the invention, the working mode of the touch panel is judged according to the instruction, different touch voltages, the floating touch voltage and the plane touch voltage are respectively input to the touch panels in different working modes, and the floating touch voltage is set to be larger than the plane touch voltage, so that the signal quantity received by the floating electrode 4 can be effectively increased, the signal quantity received by the floating electrode 4 is prevented from being conducted and absorbed by other film layers such as the signal shielding layer 5, the signal quantity received by the floating electrode 4 is prevented from being reduced, and the floating touch effect of the touch panel is ensured.
Referring to fig. 11, fig. 11 is a signal timing diagram of a driving method of a touch panel according to an embodiment of the present invention, optionally, the floating touch voltage is N times of the planar touch voltage, N is greater than or equal to 2 and is an integer, that is, the floating touch voltage is increased in a voltage doubling circuit manner, so that the amount of signals received by the floating electrode 4 can be effectively increased, and a portion of the amount of signals received by the floating electrode 4 is prevented from being conducted and absorbed by other film layers, such as the signal shielding layer 5, so that the amount of signals received by the floating electrode 4 is prevented from being reduced, and the floating touch effect of the touch panel is ensured; and the plane touch voltage is relatively small, so that the power consumption of the touch panel can be saved.
An embodiment of the present invention further provides a display device, including: a touch panel, which is the touch panel in any of the above embodiments. Therefore, the display device provided in the embodiment of the present invention has the technical effects of the technical solutions in any of the embodiments, and the explanations of the structures and terms that are the same as or correspond to the embodiments are not repeated herein. The display device provided by the embodiment of the invention can be a mobile phone and can also be any electronic product with a display function, including but not limited to the following categories: the touch screen display system comprises a television, a notebook computer, a desktop display, a tablet computer, a digital camera, an intelligent bracelet, intelligent glasses, a vehicle-mounted display, medical equipment, industrial control equipment, a touch interaction terminal and the like, and the embodiment of the invention is not particularly limited in this respect.
As will be apparent to those skilled in the art, for convenience and brevity of description, the specific working processes of the systems, modules and units described above may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again. It should be understood that the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive various equivalent modifications or substitutions within the technical scope of the present invention, and these modifications or substitutions should be covered within the scope of the present invention.
It should also be noted that the exemplary embodiments mentioned in this patent describe some methods or systems based on a series of steps or devices. However, the present invention is not limited to the order of the above-described steps, that is, the steps may be performed in the order mentioned in the embodiments, may be performed in an order different from the order in the embodiments, or may be performed simultaneously.
Claims (15)
1. A touch panel, comprising:
a substrate;
the touch control electrodes are insulated from each other and at least arranged on one side of the substrate;
the edge wirings are respectively connected with the touch electrodes, each edge wiring is arranged on the substrate and is arranged on the same layer as the touch electrode, and the orthographic projections of at least part of the edge wirings on the substrate are distributed around the peripheral sides of the orthographic projections of the touch electrodes on the substrate;
the suspension electrodes are arranged on one side, away from the substrate, of the edge routing line, orthographic projections of the suspension electrodes on the substrate at least partially cover orthographic projections of the edge routing line on the substrate, and the suspension electrodes and the edge routing line are arranged in an insulating mode.
2. The touch panel according to claim 1, wherein at least one signal shielding layer is disposed between the floating electrode and the edge trace, and an orthogonal projection of the signal shielding layer on the substrate covers an orthogonal projection of the edge trace on the substrate.
3. The touch panel according to claim 2, wherein a first insulating layer is provided between the signal shielding layer and the floating electrode; and/or the presence of a gas in the gas,
and a second insulating layer is arranged between the signal shielding layer and the edge wiring.
4. The touch panel of claim 2, wherein a minimum distance h between an orthographic projection of the signal shielding layer on the substrate and an orthographic projection of the touch electrode on the substrate is greater than or equal to 0.5 mm.
5. The touch panel of claim 2, wherein an edge of a side of the orthographic projection of the signal shielding layer on the substrate, which is close to the touch electrode, is a first edge, an edge of the orthographic projection of the floating electrode on the substrate, which is close to the touch electrode, is a second edge, and a distance d between the first edge and the second edge is greater than or equal to 0.2 mm.
6. The touch panel according to claim 1, wherein a cover plate is disposed on a side of the floating electrode facing away from the substrate, and a connection adhesive layer is disposed between the cover plate and the floating electrode; and/or the connecting glue layer is arranged between the suspension electrode and the substrate.
7. The touch panel of claim 1, further comprising a flexible circuit board, wherein the flexible circuit board and the floating electrode are disposed on the same layer, and the floating electrode is electrically connected to the flexible circuit board.
8. The touch panel of claim 1, wherein the touch electrode comprises a plurality of touch driving electrode blocks and a plurality of touch sensing electrode blocks, the touch driving electrode blocks and the touch sensing electrode blocks are insulated from each other, the plurality of touch driving electrode blocks are arranged along a first direction, the plurality of touch sensing electrode blocks are arranged along a second direction, and the first direction and the second direction intersect each other.
9. The touch panel of claim 8, wherein the touch driving electrode block is configured as a driving electrode of the floating electrode and forms a floating electrode pair with the floating electrode when the touch panel is in a floating touch detection stage.
10. The touch panel of claim 8, further comprising a cover plate, wherein the touch sensing electrode block is disposed on a side of the substrate close to the cover plate, the touch driving electrode block is disposed on a side of the substrate away from the cover plate, and an orthographic projection of the touch driving electrode block on the substrate and an orthographic projection of the floating electrode on the substrate at least partially overlap.
11. The touch panel according to claim 8, wherein the substrate includes a first substrate and a second substrate stacked in sequence along a direction perpendicular to a plane of the floating electrode, the first substrate is located on a side of the second substrate away from the floating electrode, the touch driving electrode block is disposed between the first substrate and the second substrate, and the edge trace is disposed on a side of the second substrate away from the touch driving electrode block.
12. The touch panel of claim 11, wherein a signal shielding layer covers a side of the touch driving electrode block close to the cover plate.
13. A driving method of a touch panel, applied to the touch panel of any one of claims 1 to 12, the driving method comprising:
judging the working mode of the touch panel according to the instruction;
when the working mode of the touch panel is in a plane touch detection stage, inputting a plane touch voltage to the touch electrode;
when the working mode of the touch panel is in a suspension touch detection stage, inputting a suspension touch voltage to the touch electrode so that the touch electrode and the suspension electrode form a suspension electrode pair;
wherein the floating touch voltage is greater than the planar touch voltage.
14. The driving method of the touch panel according to claim 13, wherein the floating touch voltage is N times the planar touch voltage, and N is an integer greater than or equal to 2.
15. A display device, comprising: a touch panel according to any one of claims 1 to 12.
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| CN202011601560.4A CN112732114A (en) | 2020-12-29 | 2020-12-29 | Touch panel, driving method of touch panel and display device |
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| CN202011601560.4A CN112732114A (en) | 2020-12-29 | 2020-12-29 | Touch panel, driving method of touch panel and display device |
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