CN111475050B - Touch panel and touch display device - Google Patents
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- CN111475050B CN111475050B CN202010269738.3A CN202010269738A CN111475050B CN 111475050 B CN111475050 B CN 111475050B CN 202010269738 A CN202010269738 A CN 202010269738A CN 111475050 B CN111475050 B CN 111475050B
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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
- G06F3/0412—Digitisers structurally integrated in a display
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Abstract
The invention discloses a touch panel and a touch display device; the touch panel includes: a touch substrate; the touch control units are arranged on the touch control substrate and are arranged in an array along a first direction and a second direction; each touch unit comprises at least two first electrodes, a second electrode and a third electrode; in any touch unit, the second electrode is arranged around the third electrode, the second electrode is insulated from the third electrode, at least two first electrodes are arranged along the surrounding direction of the second electrode and are positioned on one side of the second electrode, which is far away from the third electrode, and each first electrode is electrically connected with the third electrode; along the first direction, the second electrodes are electrically connected with each other, and the first electrodes in different touch units are insulated; along the second direction, the first electrodes are electrically connected with each other, and the second electrodes in different touch units are insulated. The embodiment of the invention can improve the detection precision of the touch panel.
Description
Technical Field
The present invention relates to display technologies, and in particular, to a touch panel and a touch display device.
Background
With the development of display technology, the application of display panels is becoming more and more extensive, and touch display devices with touch panels are also becoming more and more extensive due to their touch function and their convenience in use.
However, the conventional touch panel has a problem of low detection accuracy, and further application of the touch display panel is limited.
Disclosure of Invention
The invention provides a touch panel and a touch display device, which are used for improving the detection precision of the touch panel.
In a first aspect, an embodiment of the present invention provides a touch panel, including: a touch substrate; the touch control units are arranged on the touch control substrate and are arranged in an array along a first direction and a second direction; wherein the first direction intersects the second direction; each touch unit comprises at least two first electrodes, a second electrode and a third electrode; in any of the touch units, the second electrodes are arranged around the third electrodes, the second electrodes are insulated from the third electrodes, the at least two first electrodes are arranged along the surrounding direction of the second electrodes and are positioned on one side of the second electrodes far away from the third electrodes, and each first electrode is electrically connected with the third electrodes; along the first direction, the second electrodes are electrically connected with each other, and the first electrodes in different touch units are insulated; along the second direction, the first electrodes are electrically connected with each other, and the second electrodes in different touch units are insulated from each other.
Optionally, the first electrode and the third electrode form a touch driving electrode, and the second electrode is a touch sensing electrode; or the first electrode and the third electrode form a touch sensing electrode, and the second electrode is a touch driving electrode.
Optionally, the first electrode, the second electrode and the third electrode are located in the same layer, and each first electrode is electrically connected to the third electrode through at least one first bridge structure; or the first electrode and the third electrode are positioned on the same layer, and the second electrode and the first electrode are different layers.
Optionally, the shape of the touch unit is a centrosymmetric graph; the at least two first electrodes comprise four first electrodes; in any one touch unit, the centers of the first electrodes are sequentially connected to form a rectangle, and the center of the rectangle is overlapped with the center of the touch unit; the third electrode is shaped as a centrosymmetric pattern, and the third electrode is symmetric to the rectangle about the same axis of symmetry.
Optionally, the third electrode is polygonal or circular in shape.
Optionally, the at least two first electrodes comprise four first electrodes; the second electrodes comprise first sub-electrodes and four second sub-electrodes, the first sub-electrodes surround the third electrodes, the second sub-electrodes are located on one sides, far away from the third electrodes, of the first sub-electrodes, one second sub-electrode is arranged between every two adjacent first electrodes along the arrangement direction of the first electrodes, the second sub-electrodes are arranged discontinuously, and each second sub-electrode is electrically connected with the first sub-electrodes through at least one second bridge-spanning structure.
Optionally, along the first direction, between two adjacent touch units, two adjacent second electrodes are in an integral structure; and/or two adjacent first electrodes are integrated between two adjacent touch units along the second direction.
Optionally, the touch panel includes a touch sensing area and a peripheral wiring area, the peripheral wiring area includes a signal line, and the signal line includes a first conductive layer and a second conductive layer which are stacked; the first conductive layer, the first electrode and the third electrode are made of the same material in the same layer, and the second conductive layer is made of metal.
In a second aspect, an embodiment of the present invention further provides a touch display device, which includes a display panel and the touch panel described in the first aspect.
Optionally, the touch panel is located on a light emitting side of the display panel, the display panel includes a plurality of sub-pixels, and a shape of the second electrode is different from a shape of the sub-pixels.
According to the technical scheme, the adopted touch panel comprises a touch substrate; the touch control units are arranged on the touch control substrate in an array manner along a first direction and a second direction, wherein the first direction is intersected with the second direction; each touch unit comprises four first electrodes, a second electrode and a third electrode; in any touch unit, the second electrode is arranged around the third electrode, the second electrode is insulated from the third electrode, the four first electrodes are arranged along the surrounding direction of the second electrode and are positioned on one side of the second electrode, which is far away from the third electrode, and each first electrode is electrically connected with the third electrode; along the first direction, the second electrodes are electrically connected with each other, and the first electrodes of different touch units are insulated; along the second direction, the first electrodes are electrically connected with each other, and the second electrodes in different touch units are insulated. Each touch unit can be divided into four touch subunits, each touch subunit comprises a first electrode, a part of a third electrode and a part of a second electrode, in each touch subunit, an integral structure formed by the first electrode and the third electrode is overlapped with the second electrode, namely parasitic capacitance exists, each touch subunit can be equivalent to an RC circuit, and therefore each touch subunit can be used as a basic unit for touch detection, and detection accuracy is improved on the basis that the touch units are not increased, namely a first signal line and a second signal line are not increased. Correspondingly, under the same detection precision, fewer touch sensing lines and touch driving lines can be arranged, the size of a non-touch area is reduced, and the size of a black edge of a cover plate is reduced; the reduction of the signal lines is also beneficial to enhancing the ESD resistance and expanding the selection range of the touch drive chip.
Drawings
Fig. 1 is a schematic structural diagram of a touch panel in the prior art;
fig. 2 is a schematic structural diagram of a touch panel according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a touch unit according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of another touch unit according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of another touch unit according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of another touch unit according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a touch unit according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of another touch panel according to an embodiment of the present invention;
fig. 9 is a schematic structural diagram of a touch display device according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
As mentioned in the background art, the conventional touch panel has a problem of low detection accuracy, and the inventors have found through careful research that the reason for this technical problem is that: fig. 1 is a schematic structural diagram of a touch panel in the prior art, and referring to fig. 1, a conventional touch panel, such as a mutual capacitance type touch panel, includes a plurality of touch units 10 'arranged in an array along a first direction X and a second direction Y, each touch unit 10' includes a touch sensing electrode 101 'and a touch driving electrode 102', two touch driving electrodes 102 'in the same touch unit 10' are electrically connected through a bridge 103', the touch sensing electrodes 101' are connected in a pattern, fig. 1 exemplarily shows that the touch panel includes four rows and four columns of touch units 10', and the touch driving electrodes 102' of the same column of touch units 10 'are electrically connected and connected to a touch driving chip through touch driving lines 104'; the touch sensing electrodes 101' of the touch units 10' in the same row are electrically connected and connected to the touch driving chip through the touch sensing lines 105', the touch panel in fig. 1 has 16 touch units 10', each touch unit 10' corresponds to one touch detection point, and 4 touch driving lines 104' and 4 touch sensing lines 105' are needed, and if the detection precision is to be improved, more touch units need to be arranged in the same area, and such arrangement increases the difficulty of patterning on one hand, and on the other hand, more touch sensing lines and touch driving lines need to be arranged, and the size of a non-touch area is increased by the excessive touch sensing lines and touch driving lines, and the selection range of the touch driving chip is reduced.
Based on the technical problem, the invention provides the following solution:
fig. 2 is a schematic structural diagram of a touch panel according to an embodiment of the present invention, fig. 3 is an enlarged view of a touch unit in fig. 2, and referring to fig. 2 and fig. 3, the touch panel includes: a touch substrate; the touch control device comprises a plurality of touch control units 10 arranged on a touch control substrate, wherein the touch control units 10 are arranged in an array along a first direction X and a second direction Y; wherein the first direction X intersects the second direction Y; each touch unit 10 includes at least two first electrodes 101, a second electrode 102 and a third electrode 103, and each touch unit 10 includes four first electrodes 101 as an example; in any touch unit 10, the second electrode 102 is disposed around the third electrode 103, the second electrode 102 is insulated from the third electrode 103, at least two first electrodes 101 are arranged along the surrounding direction of the second electrode 102 and located on one side of the second electrode 102 away from the third electrode 103, and each first electrode 101 is electrically connected to the third electrode 103; along the first direction X, the second electrodes 102 are electrically connected to each other, and the first electrodes 101 of different touch units 10 are insulated from each other; along the second direction Y, the first electrodes 101 are electrically connected to each other, and the second electrodes 102 in different touch units 10 are insulated.
Specifically, the touch substrate may be a transparent substrate such as a glass substrate, a polymer substrate (e.g., a cyclo-olefin polymer COP), etc. for providing support for the touch unit, and the transparent substrate does not affect the display of the display panel. Fig. 2 exemplarily shows 16 touch units 10 in four rows and four columns, and the first direction X may be perpendicular to the second direction Y. In this embodiment, the first electrode 101, the second electrode 102, and the third electrode 103 may all adopt Indium Tin Oxide (ITO), and the ITO has transparent conductivity, and is used as an electrode without affecting the display of the display panel; along the second direction Y (column direction), the first electrodes 101 in the touch units 10 in the same column are electrically connected to each other, a first signal line 105 may be led out from any one of the first electrodes in the touch units 10 in the same column, for example, the first signal line 105 is led out from one of the first electrodes 101 in the first touch unit 10, one end of the first signal line 105 is electrically connected to the first electrode 101, and the second end of the first signal line 105 is electrically connected to the touch driving chip; the second electrodes 102 of the touch units 10 located in the same row are electrically connected along the first direction X (row direction), and a second signal line 106 can be led out from the second electrode 102 of any one touch unit 10, for example, one end of the second electrode 102 of the first touch unit 10 is electrically connected to one end of the second signal line 106 along the first direction X, and the other end of the second signal line 106 is connected to the touch driving chip; one of the first signal line 105 and the second signal line 106 serves as a touch driving signal line for receiving a touch driving signal from the touch driving chip, and the other serves as a touch sensing signal line for transmitting a touch sensing signal to the touch driving chip. As shown in fig. 3, since the second electrode 102 surrounds the third electrode 103, and the four first electrodes 101 are arranged along the direction in which the second electrode 102 surrounds the third electrode 103, each touch unit 10 can be equivalent to four touch sub-units 201, each touch sub-unit 201 includes one first electrode 101, a part of the third electrode 103, and a part of the second electrode 102; in the touch sub-unit 201, the third electrode 103 and the first electrode 101 form an integral structure, and a capacitance exists between the integral structure and the second electrode, when a touch occurs, the capacitance change in the touch sub-unit 201 where the touch occurs is the largest, which causes the oscillation period and the frequency of the equivalent RC circuit of the touch sub-unit 201 to change, and the touch driving chip can calculate the position of the touch sub-unit 201 where the touch occurs by calculating the change (for example, by the change of the frequency). That is, in the present embodiment, each touch unit 10 corresponds to four touch subunits 201, and the touch subunits are used as basic units for detection during touch detection, but the number of the first signal lines 105 and the number of the second signal lines 106 are not changed, that is, the number of the basic units is greatly increased on the basis of not increasing the number of the first signal lines 105 and the second signal lines 106, so as to improve the detection accuracy. Correspondingly, under the same detection precision, fewer touch sensing lines and touch driving lines can be arranged, the size of a non-touch area is reduced, and the size of a black edge of a cover plate is reduced; the reduction of signal lines is also beneficial to enhancing the ESD resistance and expanding the selection range of the touch drive chip.
According to the technical scheme of the embodiment, the adopted touch panel comprises a touch substrate; the touch control units are arranged on the touch control substrate in an array manner along a first direction and a second direction, wherein the first direction is intersected with the second direction; each touch unit comprises four first electrodes, a second electrode and a third electrode; in any touch unit, the second electrode is arranged around the third electrode, the second electrode is insulated from the third electrode, the four first electrodes are arranged along the surrounding direction of the second electrode and are positioned on one side of the second electrode, which is far away from the third electrode, and each first electrode is electrically connected with the third electrode; along the first direction, the second electrodes are electrically connected with each other, and the first electrodes of different touch units are insulated; along the second direction, the first electrodes are electrically connected with each other, and the second electrodes in different touch units are insulated. Each touch unit can be divided into four touch subunits, each touch subunit comprises a first electrode, a part of a third electrode and a part of a second electrode, in each touch subunit, an integral structure formed by the first electrode and the third electrode is overlapped with the second electrode, namely parasitic capacitance exists, each touch subunit can be equivalent to an RC circuit, and therefore each touch subunit can be used as a basic unit for touch detection, and detection accuracy is improved on the basis that the touch units are not increased, namely a first signal line and a second signal line are not increased. Correspondingly, under the same detection precision, fewer touch sensing lines and touch driving lines can be arranged, the size of a non-touch area is reduced, and the size of a black edge of a cover plate is reduced; the reduction of signal lines is also beneficial to enhancing the ESD resistance and expanding the selection range of the touch drive chip.
Optionally, with continued reference to fig. 2 and 3, the first electrode 101 and the third electrode 103 form a touch driving electrode, and the second electrode 102 is a touch sensing electrode.
Specifically, the first signal line 105 can be used as a touch driving line, the second signal line 106 can be used as a touch sensing line, when a touch driving signal is received on the first signal line 105, each touch subunit 201 in the same row of touch units 10 corresponding to the first signal line receives the touch driving signal, and according to whether a touch occurs and affects a touch sensing signal on the second signal line 106, the touch driving chip can determine the touch subunit where the touch occurs according to the received touch sensing signal, and further determine the position where the touch occurs. It should be noted that, in some other embodiments, the first electrode 101 and the third electrode 103 may also form a touch sensing electrode, and the second electrode 102 serves as a touch driving electrode; accordingly, the first signal line 105 can be used as a touch sensing line, and the second signal line 106 can be used as a touch driving line.
Optionally, with continued reference to fig. 2 and 3, the first electrode 101, the second electrode 102, and the third electrode 103 are located on the same layer, and each first electrode 101 is electrically connected to the third electrode 103 through at least one first bridge structure 104; or the first electrode and the third electrode are positioned on the same layer, and the second electrode and the first electrode are different layers.
Specifically, when the first electrode 101, the second electrode 102 and the third electrode 103 are disposed on the same layer, since the first electrode 101 is insulated from the second electrode 102, for example, the first electrode 101 and the second electrode 102 may be disposed without contacting, and the third electrode 103 and the second electrode 102 may be disposed without contacting, the first electrode 101 may be electrically connected to the third electrode 103 through at least one first bridge 104, and the second electrode in the same touch unit has the same pattern. Or the first electrode and the third electrode are positioned on the same layer, the first electrode and the third electrode are in the same pattern, the second electrode and the first electrode are in different layers, a bridge-crossing structure is not needed to be adopted to electrically connect the first electrode and the third electrode, and the preparation process is simple.
Optionally, with continued reference to fig. 2 and 3, the touch unit 10 is shaped as a centrosymmetric graph; the at least two first electrodes comprise four first electrodes; in any touch unit, the centers of the first electrodes 101 are sequentially connected to form a rectangle, and the center of the rectangle is overlapped with the center of the touch unit 10; the shape of the third electrode 103 is a center symmetrical pattern, and the third electrode 103 is symmetrical to a rectangle about the same symmetry axis.
Specifically, the shape of the touch unit 10 is a centrosymmetric pattern, which means that the outer contour of the touch unit 10 is a centrosymmetric pattern, and as shown in fig. 3, the shape of the touch unit 10 may be a rectangle, and preferably a square. The center of the rectangle formed by the centers of the first electrodes 101 overlaps with the center of the touch unit 10, and the third electrodes 103 and the rectangle are symmetrical about the same symmetry axis, that is, each touch subunit 201 has the same structure, and the equivalent circuit has the same resistance and capacitance values, so that the touch driving chip can calculate the position of the touch subunit 201 with the largest capacitance variation, and the calculation complexity is reduced.
Optionally, fig. 4 is a schematic structural diagram of another touch unit provided in the embodiment of the present invention, fig. 5 is a schematic structural diagram of another touch unit provided in the embodiment of the present invention, fig. 6 is a schematic structural diagram of another touch unit provided in the embodiment of the present invention, and with reference to fig. 3 to 6, the shape of the third electrode 103 is a polygon or a circle.
Specifically, the shape of the third electrode 103 may be set according to different application scenarios, for example, when the touch panel is applied to a touch display panel, the touch display panel includes a display panel, and the display panel includes a plurality of sub-pixels, and if the shape of the sub-pixels is the same as the shape of the third electrode, light emitted by the sub-pixels may interfere with each other, thereby seriously affecting the display effect; the shape of the third electrode can be specifically designed according to the shape of the sub-pixel, and if the sub-pixel is circular, the third electrode can be set to be polygonal; when the sub-pixels are polygonal, the third electrodes can be arranged to be circular; as long as the shape of the third electrode is different from that of the sub-pixels, the light emitted by the sub-pixels can be prevented from generating interference, and the display effect of the display panel cannot be influenced.
Optionally, fig. 7 is a schematic structural diagram of a touch unit according to an embodiment of the present invention, and referring to fig. 7, the at least two first electrodes include four first electrodes; the second electrodes include a first sub-electrode 1021 and four second sub-electrodes 1022, the first sub-electrode 1021 is disposed around the third electrode 103, the second sub-electrodes 1022 are located on a side of the first sub-electrode 1021 away from the third electrode 103, along the arrangement direction of the first electrodes 101, one second sub-electrode 1022 is disposed between two adjacent first electrodes 101, and the second sub-electrodes 1022 are disposed discontinuously, and each second sub-electrode 1022 is electrically connected to the first sub-electrode 1021 through at least one second bridge structure 301.
Specifically, in the embodiment, each of the second sub-electrodes 1022 is electrically connected to the first sub-electrode 1021 through one second bridging structure 301, and since the resistance of the second bridging structure 301 is much smaller than the resistances of the first sub-electrode 1021 and the second sub-electrode 1022, the resistance of each of the second electrodes is smaller, and the length of each of the second bridging structures 301 is shorter, so that the second bridging structure 301 has a smaller influence on the display effect of the touch display panel having the touch panel.
Optionally, fig. 8 is a schematic structural diagram of another touch panel according to an embodiment of the present invention, and referring to fig. 8, two adjacent second electrodes are integrated between two adjacent touch units 10 along a first direction X; and/or, along the second direction Y, between two adjacent touch units 10, two adjacent first electrodes are of an integral structure.
By the arrangement, when the first electrode and the second electrode are formed in a graphical mode, the number of the divided electrodes can be reduced, layout design is simplified, and meanwhile the stability of electric connection between the adjacent second electrodes and the stability of electric connection between the adjacent first electrodes can be guaranteed.
Optionally, the touch panel includes a touch sensing area and a peripheral wiring area, the peripheral wiring area includes a signal line, and the signal line includes a first conductive layer and a second conductive layer which are stacked; the first conducting layer, the first electrode and the third electrode are made of the same material at the same layer, and the second conducting layer is made of metal.
Specifically, the touch sensing area may correspond to an image display area (AA area) of the display panel, and the peripheral wiring area is disposed around the touch sensing area; the peripheral wiring area includes signal lines, which may be the first signal line 105 and/or the second signal line 106, or may be other signal lines; the signal line comprises a first conductive layer and a second conductive layer which are arranged in a laminated manner; the first conductive layer, the first electrode and the third electrode may be made of the same material in the same layer, and specifically, transparent conductive Indium Tin Oxide (ITO) may be used; the second conductive layer can be metal, and specifically, at least one of silver, copper, molybdenum, gold, aluminum and the like or an alloy thereof can be used; in addition, the first conductive layer and the second conductive layer which are stacked are not limited in the vertical positional relationship. The signal line adopts the multilayer conducting layer that the stromatolite set up, can reduce signal line impedance on the one hand, on the other hand can multiplexing touch panel other rete and do not increase preparation technology.
Fig. 9 is a schematic structural diagram of a touch display device according to an embodiment of the present invention, and referring to fig. 9, the touch display device includes a display panel and the touch panel according to any of the embodiments.
Specifically, the touch display device may be applied to a touch display panel on a mobile phone, a tablet computer, or a wearable device, or the touch display device may be a mobile phone, a tablet computer, or a wearable device, and therefore, the touch display device includes the touch panel provided in any embodiment of the present invention, and therefore, the same advantageous effects are also provided, and further description is omitted here.
Optionally, the touch panel is located on a light emitting side of the display panel, the display panel includes a plurality of sub-pixels, and a shape of the third electrode is different from a shape of the sub-pixels.
Specifically, if the shape of the sub-pixel is the same as that of the third electrode, light emitted by the sub-pixel may interfere with each other, thereby seriously affecting the display effect; the shape of the third electrode can be specifically designed according to the shape of the sub-pixel, and if the sub-pixel is circular, the third electrode can be set to be polygonal; when the sub-pixels are polygonal, the third electrode can be arranged to be circular; as long as the shape of the third electrode is different from that of the sub-pixels, the light emitted by the sub-pixels can be prevented from generating interference, and the display effect of the display panel cannot be influenced.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (9)
1. A touch panel, comprising:
a touch substrate;
the touch control units are arranged on the touch control substrate and are arranged in an array along a first direction and a second direction; wherein the first direction intersects the second direction;
each touch unit comprises at least two first electrodes, a second electrode and a third electrode; in any one touch unit, the second electrode is arranged around the third electrode, the second electrode is insulated from the third electrode, the at least two first electrodes are arranged along the surrounding direction of the second electrode and are positioned on one side of the second electrode, which is far away from the third electrode, and each first electrode is electrically connected with the third electrode;
along the first direction, the second electrodes are electrically connected with each other, and the first electrodes in different touch units are insulated;
along the second direction, the first electrodes are electrically connected with each other, and the second electrodes in different touch units are insulated;
the shape of the touch unit is a centrosymmetric graph; the at least two first electrodes comprise four first electrodes;
in any one touch unit, the centers of the first electrodes are sequentially connected to form a rectangle, and the center of the rectangle is overlapped with the center of the touch unit;
the third electrode is shaped in a centrosymmetric pattern, and the third electrode is symmetric with the rectangle about the same axis of symmetry.
2. The touch panel of claim 1, wherein the first electrode and the third electrode form a touch driving electrode, and the second electrode is a touch sensing electrode; or the first electrode and the third electrode form a touch sensing electrode, and the second electrode is a touch driving electrode.
3. The touch panel of claim 1, wherein the first electrodes, the second electrodes, and the third electrodes are located on a same layer, and each of the first electrodes is electrically connected to the third electrode through at least one first bridge structure;
or the first electrode and the third electrode are positioned on the same layer, and the second electrode and the first electrode are different layers.
4. The touch panel of claim 1,
the third electrode is polygonal or circular in shape.
5. The touch panel of claim 1, wherein the at least two first electrodes comprise four first electrodes; the second electrodes comprise first sub-electrodes and four second sub-electrodes, the first sub-electrodes surround the third electrodes, the second sub-electrodes are located on one sides, far away from the third electrodes, of the first sub-electrodes, one second sub-electrode is arranged between every two adjacent first electrodes along the arrangement direction of the first electrodes, the second sub-electrodes are arranged discontinuously, and each second sub-electrode is electrically connected with the first sub-electrodes through at least one second bridge-spanning structure.
6. The touch panel according to claim 1, wherein, between two adjacent touch units along the first direction, two adjacent second electrodes are of an integral structure; and/or two adjacent first electrodes are integrated between two adjacent touch units along the second direction.
7. The touch panel of claim 1, comprising a touch sensing area and a peripheral routing area, wherein the peripheral routing area comprises signal lines, and the signal lines comprise a first conductive layer and a second conductive layer arranged in a stacked manner; the first conducting layer, the first electrode and the third electrode are made of the same material at the same layer, and the second conducting layer is made of metal.
8. A touch display device comprising a display panel and the touch panel according to any one of claims 1 to 7.
9. The touch display device of claim 8,
the touch panel is located on the light emitting side of the display panel, the display panel comprises a plurality of sub-pixels, and the shape of the second electrode is different from that of the sub-pixels.
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| CN109669573A (en) * | 2018-12-17 | 2019-04-23 | 上海天马有机发光显示技术有限公司 | Touch-control display panel and touch control display apparatus |
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| CN111475050A (en) | 2020-07-31 |
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