CN113031810B - Touch panel and display device - Google Patents
Touch panel and display device Download PDFInfo
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- CN113031810B CN113031810B CN202110219649.2A CN202110219649A CN113031810B CN 113031810 B CN113031810 B CN 113031810B CN 202110219649 A CN202110219649 A CN 202110219649A CN 113031810 B CN113031810 B CN 113031810B
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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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- 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
- G06F3/04164—Connections between sensors and controllers, e.g. routing lines between electrodes and connection pads
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- 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
- G06F2203/04102—Flexible digitiser, i.e. constructional details for allowing the whole digitising part of a device to be flexed or rolled like a sheet of paper
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- General Engineering & Computer Science (AREA)
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- Human Computer Interaction (AREA)
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- General Physics & Mathematics (AREA)
- Computer Networks & Wireless Communication (AREA)
- Position Input By Displaying (AREA)
Abstract
The invention discloses a touch panel and a display device, wherein the touch panel comprises a plurality of first touch electrode chains, a plurality of second touch electrode chains and a plurality of auxiliary electrodes, each first touch electrode chain comprises a plurality of first touch electrodes, each second touch electrode chain comprises a plurality of second touch electrodes, the plurality of second touch electrode chains and the plurality of first touch electrode chains are intersected and insulated, the plurality of auxiliary electrodes, the plurality of second touch electrode chains and the plurality of first touch electrode chains are insulated, when the touch panel is in a mutual capacitance scanning stage, mutual capacitance is formed between the plurality of second touch electrode chains and the plurality of first touch electrode chains, and the plurality of auxiliary electrodes are electrically grounded; according to the scheme, the branch circuits of the electric charges flowing out through the fingers are increased, and the working reliability of the touch panel in a mutual capacitance state is improved.
Description
Technical Field
The invention relates to the technical field of display, in particular to the technical field of display panel manufacturing, and particularly relates to a touch panel and a display device.
Background
The flexible display technology can realize the folding of the screen, and in order to realize a better folding effect, the cover plate of the screen needs to be made thin enough.
However, for the touch panel in the mutual capacitance state, the too thin cover plate of the screen may reduce the distance between the finger and the touch electrode, increase the capacitance between the finger and the touch electrode, and cause the electric charge that should be taken away by the human body during the touch operation to return to the touch chip through the touch electrode, i.e. the electric charge change detected by the touch chip will be reduced, thereby interfering the normal operation of the touch chip and reducing the reliability of the touch panel in the mutual capacitance state.
In summary, it is necessary to provide a touch panel and a display device capable of improving the reliability of the touch panel in a mutual-compatible state.
Disclosure of Invention
Embodiments of the present invention provide a touch panel and a display device, in which a plurality of auxiliary electrodes in the touch panel are electrically grounded in a mutual capacitance scanning stage, so as to solve a problem that a working reliability of the touch panel is low due to a small change of charges detected by a touch chip in the mutual capacitance scanning stage.
An embodiment of the present invention provides a touch panel, including:
the touch control device comprises a plurality of first touch control electrode chains, a plurality of touch control electrode units and a plurality of touch control electrode units, wherein each first touch control electrode chain comprises a plurality of first touch control electrodes;
each second touch electrode chain comprises a plurality of second touch electrodes, and the second touch electrode chains and the first touch electrode chains are intersected and insulated;
at least one auxiliary electrode chain, each of said auxiliary electrode chains comprising a plurality of auxiliary electrodes;
when the touch panel is in a mutual capacitance scanning stage, mutual capacitance is formed between the plurality of second touch electrode chains and the plurality of first touch electrode chains, each auxiliary electrode chain is insulated from the plurality of second touch electrode chains and the plurality of first touch electrode chains, and each auxiliary electrode chain is electrically grounded.
Embodiments of the present invention provide a display device, which includes an encapsulation layer, a cover plate, and the touch panel as described above, where the touch panel is located between the encapsulation layer and the cover plate.
The touch panel and the display device provided by the embodiment of the invention have the advantages that the touch panel comprises a plurality of first touch electrode chains, a plurality of second touch electrode chains and a plurality of auxiliary electrodes, each first touch electrode chain comprises a plurality of first touch electrodes, each second touch electrode chain comprises a plurality of second touch electrodes, the plurality of second touch electrode chains and the plurality of first touch electrode chains are intersected and arranged in an insulated mode, the plurality of auxiliary electrodes, the plurality of second touch electrode chains and the plurality of first touch electrodes are arranged in an insulated mode, mutual capacitance is formed between the plurality of second touch electrode chains and the plurality of first touch electrode chains when the touch panel is in a mutual capacitance scanning stage, the plurality of auxiliary electrodes are electrically grounded to increase a branch circuit of charges flowing out through fingers, the charges are effectively prevented from returning to the touch chip through the touch electrodes, the defect that the charges detected by the touch chip are less is overcome, and the reliability of the touch panel in working in a mutual capacitance state is improved.
Drawings
The technical solution and other advantages of the present invention will become apparent from the following detailed description of specific embodiments of the present invention, which is to be read in connection with the accompanying drawings.
Fig. 1 is a schematic top view of a touch panel according to an embodiment of the invention.
Fig. 2 is a schematic top view of a first touch electrode chain according to an embodiment of the invention.
Fig. 3 is a schematic top view of a second touch electrode chain according to an embodiment of the invention.
Fig. 4 is a schematic top view of a plurality of auxiliary units according to an embodiment of the present invention.
Fig. 5 is a schematic top view of an auxiliary unit according to an embodiment of the present invention.
Fig. 6 is an equivalent circuit diagram of the touch panel in the mutual capacitance scanning stage according to the embodiment of the present invention.
Fig. 7 is a schematic top view of the touch panel in the compatible scanning stage according to the embodiment of the present invention.
Fig. 8 is a schematic top view of the touch panel in the compatible scanning stage according to the embodiment of the present invention.
Fig. 9 is a schematic diagram of an internal circuit of a switching module according to an embodiment of the present invention.
Fig. 10 is a schematic top view of a plurality of auxiliary units according to an embodiment of the present invention.
Fig. 11 is a schematic top view of another plurality of auxiliary units according to an embodiment of the present invention.
Fig. 12 is a schematic top view of a plurality of first auxiliary electrode chains according to an embodiment of the present invention.
Fig. 13 is a schematic top view of a plurality of second auxiliary electrode chains according to an embodiment of the present invention.
Fig. 14 is a schematic top view of another auxiliary unit according to an embodiment of the present invention.
Fig. 15 is a schematic top view of a first touch electrode according to an embodiment of the disclosure.
Fig. 16 is a schematic top view of a second touch electrode according to an embodiment of the invention.
Fig. 17 is a schematic top view of a unit area of a touch panel according to an embodiment of the invention.
Fig. 18 is a schematic cross-sectional view of a touch panel according to an embodiment of the invention.
Fig. 19 is a schematic cross-sectional view of another touch panel according to an embodiment of the invention.
Fig. 20 is an enlarged schematic top view of a region B of the touch panel according to the embodiment of the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and continuously described below with reference to the drawings in the embodiments of the present invention. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be obtained by a person skilled in the art without inventive step based on the embodiments of the present invention, are within the scope of protection of the present invention.
Embodiments of the present invention provide a touch panel, which includes, but is not limited to, the following embodiments and combinations of the following embodiments.
In one embodiment, as shown in fig. 1 to 3, the touch panel 100 includes: a plurality of first touch electrode chains 101, wherein each first touch electrode chain 101 comprises a plurality of first touch electrodes 01; a plurality of second touch electrode chains 102, each of the second touch electrode chains 102 includes a plurality of second touch electrodes 02, and the plurality of second touch electrode chains 102 and the plurality of first touch electrode chains 101 intersect and are insulated from each other; at least one auxiliary electrode chain, each of the auxiliary electrode chains comprising a plurality of auxiliary electrodes 03; when the touch panel 100 is in the mutual capacitance scanning stage, mutual capacitance is formed between the plurality of second touch electrode chains 102 and the plurality of first touch electrode chains 101, each auxiliary electrode chain is insulated from the plurality of second touch electrode chains 102 and the plurality of first touch electrode chains 101, and each auxiliary electrode 03 is electrically grounded.
As shown in fig. 2, a plurality of first touch electrode chains 101 may be arranged in parallel along a first direction 10, and two adjacent first touch electrode chains 101 are arranged in an insulating manner; as shown in fig. 3, a plurality of second touch electrode chains 102 may be disposed in parallel along the second direction 20, and two adjacent second touch electrode chains 102 are disposed in an insulating manner. It should be noted that, two adjacent first touch electrode chains 101 have a gap to be disposed in an insulating manner, two adjacent second touch electrode chains 102 also have a gap to be disposed in an insulating manner, and the first touch electrode chains 101 and the second touch electrode chains 102 also have a gap to be disposed in an insulating manner. Further, as shown in fig. 1-2, each of the first touch electrode chains 101 may be electrically connected to a corresponding first signal line 201, and each of the first signal lines 201 transmits a first touch signal to the corresponding first touch electrode chain 101 or receives a first sensing signal from the corresponding first touch electrode chain 101; each of the second touch electrode chains 102 may be electrically connected to a corresponding second signal line 202, and each of the second signal lines 202 transmits a second touch signal to the corresponding second touch electrode chain 102 or receives a second sensing signal from the corresponding second touch electrode chain 102. Further, the first direction 10 and the second direction 20 may be perpendicular to each other, for example, in a top view, the first direction 10 may be a horizontal direction, the second direction 20 may be a vertical direction, the plurality of first signal lines 201 may extend to a bonding area along the vertical direction, and the plurality of second signal lines 202 may extend to the bonding area at least sequentially along the horizontal direction and the vertical direction.
When the touch panel 100 is in the mutual capacitance scanning stage, the description will be given by taking the first touch electrode chains 101 as driving electrodes and the second touch electrode chains 102 as sensing electrodes. Specifically, the corresponding first touch signals may be sequentially loaded to the plurality of first signal lines 201 to sequentially transmit the corresponding first touch signals to the plurality of first touch electrode chains 101, for example, when a first touch electrode chain 101 has the corresponding first touch signal, the corresponding second sensing signals in the plurality of second touch electrode chains 102 may be sequentially received by the plurality of second signal lines 202, when a last second signal line 202 finishes receiving the corresponding second sensing signal in the corresponding second touch electrode chain 102, the corresponding first touch signal is transmitted to a second touch electrode chain 101, and so on until a last first touch electrode chain 101 has the corresponding first touch signal and a last second signal line 202 finishes receiving the corresponding second sensing signal in the corresponding second touch electrode chain 102.
It should be noted that, when the touch panel 100 is in the mutual capacitance scanning stage, the potentials of the auxiliary electrodes 03 are all zero. Specifically, the plurality of auxiliary electrodes 03 may be electrically connected or non-electrically connected, and the plurality of auxiliary electrodes 03 may be electrically grounded respectively, so that the plurality of auxiliary electrodes 03 are electrically grounded; or a plurality of the auxiliary electrodes 03 may be electrically connected to each other, and any one of the auxiliary electrodes 03 may be electrically grounded, so that all of the plurality of the auxiliary electrodes 03 are electrically grounded. Specifically, when a plurality of the auxiliary electrodes 03 are electrically connected to each other, as shown in fig. 4, the touch panel 100 may include a plurality of auxiliary units 109, the plurality of auxiliary units 109 are electrically connected to electrically connect the plurality of auxiliary electrodes 03, and any one of the auxiliary units 109 may be electrically connected to an auxiliary line 203 for electrical grounding, that is, as shown in fig. 1, a plurality of the auxiliary electrodes 03 may be electrically connected to the auxiliary line 203 for electrical grounding; further, as shown in fig. 5, each of the auxiliary units 109 includes a plurality of the auxiliary electrodes 03 and a plurality of bridging portions 04, the plurality of bridging portions 04 and the plurality of auxiliary electrodes 03 are arranged in different layers, each of the bridging portions 04 is electrically connected to the corresponding two auxiliary electrodes 03, and the plurality of auxiliary electrodes 03 are electrically connected through the plurality of bridging portions 04.
It can be understood that, as shown in fig. 6, it is a corresponding equivalent circuit diagram of the touch panel 100 in the mutual capacitance scanning stage. Specifically, the touch signal source 403 may input the corresponding first touch signal to the first touch electrode chain 101, when the external object 30 touches the touch panel complete machine 50, a first capacitor 401 and a second capacitor 402 are respectively formed between the external object 30 and the first touch electrode chain 101 and the second touch electrode chain 102, the second touch electrode chain 102 is electrically connected to the touch chip 404 to transmit the corresponding second sensing signal to the touch chip 404, a third capacitor 405 is formed between the first touch electrode chain 101 and the second touch electrode chain 102, a fourth capacitor 406 is formed between the external object 30 and the ground 40, and a fifth capacitor 407 is formed between the ground 40 and the touch panel 100. It should be noted that, when the external object 30 touches the touch panel 100, that is, a capacitance is formed between the external object 30 and the auxiliary electrode 03, that is, two capacitances connected in series respectively formed between the external object 30 and the ground 40, between the ground 40 and the touch panel 50 can form an equivalent sixth capacitance 408. It can be understood that, on one hand, the capacitance formed by the sixth capacitor 408 and the total capacitance formed by the fourth capacitor 406 connected in series with the fifth capacitor 407 is greater than the total capacitance formed by the fourth capacitor 406 connected in series with the fifth capacitor 407, that is, the capacitive reactance is decreased, so that the charge flowing to the branch where the fourth capacitor 406, the fifth capacitor 407 and the sixth capacitor 408 are located is increased, and correspondingly, the charge flowing to the second capacitor 402 and the touch chip 404 in sequence is decreased, so that the decrease amount of the charge detected by the touch chip 404 is increased; on the other hand, since the sixth capacitor 408 is added, that is, a branch for flowing out the charges is added, accordingly, the charges flowing to the second capacitor 402 and the touch chip 404 in sequence are reduced. Therefore, the present embodiment can effectively avoid the charge returning to the touch chip 404 through the second touch electrode chain 102, so as to improve the defect that the charge detected by the touch chip 404 is less, and improve the reliability of the touch panel 100 in the mutual capacitance state.
In an embodiment, as shown in fig. 1 and 4, each of the auxiliary electrode chains 103 corresponds to the corresponding first touch electrode chain 101 or the corresponding second touch electrode chain 102; when the touch panel is in the self-capacitance scanning stage, self-capacitance is formed between each of the second touch electrode chains 102 and the first touch electrode chains 101 and the ground, and each of the auxiliary electrode chains 103 is electrically connected to the corresponding first touch electrode chain 101 or the corresponding second touch electrode chain 102.
Specifically, as shown in fig. 4, different auxiliary electrode chains 103 are arranged in an insulating manner, each auxiliary electrode chain 103 may include a plurality of auxiliary units 109, and each auxiliary electrode chain 103 may include a plurality of auxiliary units 109 arranged along the first direction 10 or the second direction 20. When the touch panel 100 includes one auxiliary electrode chain 103, as shown in fig. 1 and 4, the plurality of auxiliary units 109 in the auxiliary electrode chain 103 may be arranged along the first direction 10 and the plurality of auxiliary units 109 may be electrically connected to any of the first touch electrode chains 101, and as shown in fig. 1 and 4, the plurality of auxiliary units 109 in the auxiliary electrode chain 103 may be arranged along the second direction 20 and the plurality of auxiliary units 109 may be electrically connected to any of the second touch electrode chains 102. Further, when the touch panel 100 includes two auxiliary electrode chains 103, a plurality of auxiliary units 109 in one of the auxiliary electrode chains 103 may be arranged along the first direction 10 and a plurality of auxiliary units 109 may be electrically connected to any of the first touch electrode chains 101, and a plurality of auxiliary units 109 in the other auxiliary electrode chain 103 may be arranged along the second direction 20 and a plurality of auxiliary units 109 may be electrically connected to any of the second touch electrode chains 102.
When the touch panel 100 is in the self-contained scanning stage, the first touch electrode chains 101 and the second touch electrode chains 102 are multiplexed as driving electrodes and sensing electrodes. Specifically, for example, each of the first signal lines 201 may transmit a corresponding third touch signal to the corresponding first touch electrode chain 101, and receive a third sensing signal generated by the first touch electrode chain 101 at the same time or at different times; similarly, each of the second signal lines 202 may transmit a corresponding third touch signal to the corresponding second touch electrode chain 102, and receive a fourth sensing signal generated by the second touch electrode chain 102 at the same time or at different times. A time period during which any one of the first signal lines 201 transmits the corresponding third touch signal to the corresponding first touch electrode chain 101 may be disjoint with a time period during which any one of the second signal lines 202 may transmit the corresponding third touch signal to the corresponding second touch electrode chain 102.
It can be understood that, when the touch panel 100 is in the self-capacitance scanning stage, the first touch electrode chain 101 or the second touch electrode chain 102 is electrically connected to the corresponding auxiliary electrode chain 103, so that the area of the corresponding effective capacitor can be increased, the capacitance of the corresponding self-capacitor can be increased, the sensing amount can be increased, the measurement of the capacitance of the self-capacitor can be facilitated, and the reliability of the touch panel 100 in working in the self-capacitance state can be improved. It should be noted that, in order to distinguish the self capacitance between each first touch electrode chain 101 or each second touch electrode chain 102 and the ground, it is avoided that the touch position cannot be determined due to at least two adjacent auxiliary electrode chains 103 corresponding to the same touch position, and in combination with the above working principle of self capacitance, different auxiliary electrode chains 103 may be disposed in an insulating manner.
In an embodiment, as shown in fig. 7-8, the touch panel 100 further includes: a ground electrode 104, the ground electrode 104 being electrically grounded; at least one switching module 105, wherein a first end 1051 of each switching module 105 is electrically connected to at least one of the auxiliary electrode chains 103, and a second end 1052 of each switching module 105 is electrically connected to the ground electrode 104, the corresponding first touch electrode chain 101, or the corresponding second touch electrode chain 102; when the touch panel 100 is in the mutual capacitance scanning stage, as shown in fig. 7, each switching module 105 is in a first state to electrically connect the plurality of auxiliary electrodes 03 to the ground electrode 104 for grounding, and when the touch panel 100 is in the self-capacitance touch scanning stage, as shown in fig. 8, each switching module 105 is in a second state to electrically connect each auxiliary electrode chain 103 to the corresponding first touch electrode chain 101 or the corresponding second touch electrode chain 102.
Specifically, when the touch panel 100 is in the mutual capacitance scanning stage, as shown in fig. 7, the first end 1051 and the second end 1052 of each of the switching modules 105 are electrically connected to the corresponding auxiliary electrode chain 103 and the corresponding ground electrode 104, respectively; when the touch panel 100 is in the self-contained touch scanning stage, as shown in fig. 8, the first end 1051 of each of the switching modules 105 is electrically connected to the corresponding auxiliary electrode chain 103, and the second end 1052 of the switching module 105 is electrically connected to the corresponding first touch electrode chain 101 or the corresponding second touch electrode chain 102. Further, as shown in fig. 9, the switching module 105 may include a first transistor 1053 and a second transistor 1054 that are symmetrically disposed, after the source 10531 of the first transistor 1053 and the source 10541 of the second transistor 1054 are electrically connected, both of the first transistor 1053 and the second transistor 10541 are configured as the first end 1051 of the corresponding switching module 105 to be electrically connected to the corresponding auxiliary electrode chain 103, the drain 10532 of the first transistor 1053 is electrically connected to the ground electrode 104, and the drain 10542 of the second transistor 1054 is electrically connected to the corresponding first touch electrode chain 101 or the corresponding second touch electrode chain 102. Specifically, when the touch panel 100 is in the mutual capacitance scanning stage, a corresponding signal may be input to the gate 10533 of the first transistor 1053 to turn on the first transistor 1053, so as to electrically connect the corresponding auxiliary electrode chain 103 and the ground electrode 104; when the touch panel 100 is in the self-contained touch scanning stage, a corresponding signal may be input to the gate of the second transistor 1054 to turn on the second transistor 1054, so as to electrically connect the corresponding auxiliary electrode chain 103 with the corresponding first touch electrode chain 101 or the corresponding second touch electrode chain 102. It is to be noted that the periods of time during which the first transistor 1053 and the second transistor 1054 are turned on do not intersect.
In an embodiment, as shown in fig. 8 and 10, the touch panel 100 includes a plurality of auxiliary electrode chains 103, the plurality of auxiliary electrode chains 103 includes at least one first auxiliary electrode chain 1031 and at least one second auxiliary electrode chain 1032, each first auxiliary electrode chain 1031 is disposed opposite to the corresponding first touch electrode chain 101, and each second auxiliary electrode chain 1032 is disposed opposite to the corresponding second touch electrode chain 102; when the touch panel 100 is in the self-contained scanning stage, each of the switching modules 105 is in the second state, so that the corresponding first auxiliary electrode chain 1031 is electrically connected to the corresponding first touch electrode chain 101, and the corresponding second auxiliary electrode chain 1032 is electrically connected to the second touch electrode chain 102. It should be noted that the number and the position of the auxiliary electrodes 03 are not limited herein, and for example, the auxiliary electrodes 03 may be arranged as shown in fig. 11.
It can be understood from the above analysis that, when the touch panel 100 is in the self-contained scanning phase, a corresponding signal may be input to the gate of the second transistor 1054 to turn on the second transistor 1054, so that the corresponding switching module 105 is in the second state, that is, the turn-on channel of the second transistor 1054 may enable the corresponding first auxiliary electrode chain 1031 to be electrically connected to the corresponding first touch electrode chain 101, and the corresponding second auxiliary electrode chain 1032 to be electrically connected to the second touch electrode chain 102. Similarly, a plurality of the first auxiliary electrode chains 1031 may be disposed in an insulating manner, a plurality of the second auxiliary electrode chains 1032 may be disposed in an insulating manner, and a plurality of the first auxiliary electrode chains 1031 and a plurality of the second auxiliary electrode chains 1032 may be disposed in an insulating manner.
In an embodiment, based on fig. 11 and as shown in fig. 12, each of the first auxiliary electrode chains 1031 includes a plurality of first auxiliary electrodes 031, as shown in fig. 13, each of the second auxiliary electrode chains 1032 includes a plurality of second auxiliary electrodes 032, that is, the plurality of auxiliary electrodes 03 includes a plurality of first auxiliary electrodes 031 and a plurality of second auxiliary electrodes 032, as shown in fig. 12 to 13, the touch panel further includes: the plurality of first bridging parts 041, the plurality of first auxiliary electrodes 031, and the plurality of second auxiliary electrodes 032 are arranged in different layers, and each first bridging part 041 is electrically connected to two corresponding first auxiliary electrodes 031 or two corresponding second auxiliary electrodes 032. Specifically, as shown in fig. 12, each of the first auxiliary electrodes 031 may be formed in a rectangular shape extending along the second direction 20, a portion of the first bridging portions 041 is electrically connected to a plurality of the first auxiliary electrodes 031 to form the corresponding first auxiliary electrode chain 1031, and one of the first bridging portions 041 or one of the first auxiliary electrodes 031 located at an edge of the first auxiliary electrode chain 1031 may be connected to the corresponding first end 1051 of the switching module 105; as shown in fig. 13, a plurality of second auxiliary electrodes 032 may be formed in a rectangular shape extending along the first direction 10, a portion of the first bridging portion 041 is electrically connected to the plurality of second auxiliary electrodes 032 to form the corresponding second auxiliary electrode chain 1032, and one of the first bridging portion 041 or one of the second auxiliary electrodes 032 located at the edge of the second auxiliary electrode chain 1032 may be connected to the first end 1051 of the corresponding switching module 105.
It should be noted that, as shown in fig. 1 and 12, a plurality of corresponding second touch electrodes 02 are disposed between a plurality of first auxiliary electrode chains 1031, that is, the plurality of first auxiliary electrode chains 1031 may be disposed in an insulating manner; as shown in fig. 13, since gaps are provided between the plurality of second auxiliary electrode chains 1032, the plurality of second auxiliary electrode chains 1032 can be insulated from each other. Further, the intersection positions of the first auxiliary electrode chain 1031 and the second auxiliary electrode chain 1032 may be subjected to a layer changing process to achieve insulation between the corresponding first auxiliary electrode chain 1031 and the corresponding second auxiliary electrode chain 1032, for example, as shown in fig. 14, one second auxiliary electrode 032 and one first bridging portion 041 are included in each of the four corner regions a in each of the auxiliary units 109, it should be noted that the first auxiliary electrodes 031 and the first bridging portions 041 are arranged in different layers and are insulated from each other, that is, the first auxiliary electrodes 031 and the first bridging portions 041 are not electrically connected through vias but keep insulated from each other, and thus, the second auxiliary electrode chain 1032 in which the second auxiliary electrodes are located and the first auxiliary electrode chain 1031 in which the first bridging portions 041 are located can be insulated from each other.
In an embodiment, as shown in fig. 14, the touch panel 100 further includes: the plurality of second bridging portions 042, the plurality of second bridging portions 042 and the plurality of first bridging portions 041 are arranged at the same layer, the plurality of second bridging portions 042, the plurality of first touch electrodes 01 and the plurality of second touch electrodes 02 are arranged at different layers, and each second bridging portion 042 is electrically connected with two corresponding second touch electrodes 02. Specifically, as shown in fig. 15, each of the first touch electrodes 01 may have a continuous electrode pattern, that is, the currents in the first touch electrodes 01 may flow through each other; as shown in fig. 16, each of the second touch electrodes 02 may have a discontinuous electrode pattern, that is, each of the second touch electrodes 02 may include two second touch electrode parts 021 disposed at intervals.
Further, two of the second touch electrode parts 021 of each of the second touch electrodes 02 are electrically connected by at least one of the second bridging parts 042, for example, as shown in fig. 17 to 19, where fig. 18 and 19 are respectively longitudinal sectional views of fig. 17 along straight lines L1 and L2, and the two of the second touch electrode parts 021 of the second touch electrodes 02 are electrically connected by the two second bridging parts 042. Specifically, as shown in fig. 17 to 18, the touch panel 100 includes a buffer layer 501, a bridge layer 502 located on the buffer layer 501, an insulating layer 503 located on the buffer layer 501 and the bridge layer 502, and a touch electrode layer 504 located on the insulating layer 503, wherein the bridge layer 502 includes a plurality of first bridge portions 041 and a plurality of second bridge portions 042, a plurality of via holes 5031 are disposed on the insulating layer 503, the touch electrode layer 504 includes a plurality of first touch electrodes 01, a plurality of second touch electrodes 02 and a plurality of auxiliary electrodes 03, and two second touch electrode portions 021 of each of the second touch electrodes 02 may respectively extend to the corresponding second bridge portions 042 through the corresponding via holes 5031 to be electrically connected. Of course, the two corresponding auxiliary electrodes 03 in the touch electrode layer 504 can also extend to the corresponding first bridging portions 041 through the corresponding via holes 5031 respectively for electrical connection.
In an embodiment, as shown in fig. 2 to 3, at least one of the first touch electrode chains 101 and the second touch electrode chains 102 includes a main electrode 601 and a branch electrode 602 located at a side of the main electrode 601, a through hole 6011 is disposed on the branch electrode 602, and the auxiliary electrode 03 includes a portion located in the through hole 6011. Specifically, as shown in fig. 15, the first touch electrode 01 may include a first main portion 011 and a plurality of first branch portions 012 located at two sides of the first main portion 011, and each of the first branch portions 012 may have one through hole 6011 formed thereon; as shown in fig. 16, the second touch electrode 02 may include a second main portion 022 and a plurality of second branch portions 023 located at two sides of the second main portion 022, and each of the second branch portions 023 may be provided with one of the through holes 6011. It can be understood that, since the plurality of first touch electrodes 01, the plurality of second touch electrodes 02, and the plurality of auxiliary electrodes 03 are disposed on the same layer, that is, the auxiliary electrodes 03 may be located in the corresponding through holes 6011. For example, as shown in fig. 14, the pattern of each first touch electrode 01 is complementary to the pattern of the corresponding second touch electrode part 021, for example, the first touch electrode 01 is embedded inside the contour formed by the plurality of second stem parts 023 of the corresponding second touch electrode part 021, and the second stem part 022 of the second touch electrode part 021 is embedded in the first stem part 011 of the corresponding first touch electrode 01. Wherein the trunk electrode 601 includes the first trunk portion 011 and the second trunk portion 022, and the branch electrode 602 includes the first branch portion 012 and the second branch portion 023. It can be understood that, by providing the through hole 6011 on the first branch portion 012 and the second branch portion 023, the resistance of the first touch electrode chain 101 and the second touch electrode chain 102 can be prevented from increasing, i.e. most of the current passing through the first main portion 011 and the second main portion 022 is not affected. Therefore, the scheme can avoid reducing the touch quality of the touch panel 100.
Further, as shown in fig. 1 and 19, the touch panel 100 further includes: an insulating portion 106, where the insulating portion 106 is located in a gap between the corresponding first touch electrode chain 101 and the corresponding second touch electrode chain 102 to insulate the corresponding first touch electrode chain 101 and the corresponding second touch electrode chain 102. Further, as shown in fig. 15 to 17, the insulating portion 106 includes a portion located in a gap between the first touch electrode 01 and the corresponding second touch electrode 02, and since the second touch electrode 02 is located outside the corresponding first touch electrode 01, that is, the insulating portion 106 further includes a portion located in a gap between two adjacent second touch electrodes 02 arranged along the second direction 20.
In one embodiment, the touch panel 100 further includes: the substrate is positioned on the same side of the first touch electrode chains 101, the second touch electrode chains 102 and the auxiliary electrodes 03; the total area of the projections of the auxiliary electrodes 03 on the substrate is greater than any one of the total area of the projections of the first touch electrode chains 101 on the substrate and the total area of the projections of the second touch electrode chains 102 on the substrate. Wherein the substrate may be, but is not limited to, the buffer layer 501 described in fig. 17 to 18. It can be understood that, the total area of the projection of the plurality of auxiliary electrodes 03 on the substrate is set to be larger, on one hand, when the touch panel 100 is in the mutual capacitance scanning stage, the area of the electrode in the touch panel 100 contacting with the ground is larger, that is, the capacitance between the electrode in the touch panel 100 contacting with the ground and the external object performing the touch operation is increased, as can be seen from the above discussion, this embodiment improves the reliability of the operation of the touch panel 100 in the mutual capacitance state; on the other hand, when the touch panel 100 is in the self-capacitance scanning stage, the effective sensing area of at least one of the first touch electrode chain 101 and the second touch electrode chain 102 in the touch panel 100 is larger, so that the area of the corresponding effective capacitor is larger, and similarly, the reliability of the touch panel 100 in the self-capacitance state is improved.
In an embodiment, as shown in fig. 20, which is an enlarged view of the area B in fig. 17, each of the first touch electrode chains 101, each of the second touch electrode chains 102, and each of the auxiliary electrodes 03 are in a grid shape; the density of the grid in each auxiliary electrode 03 is greater than any one of the density of the grid in each first touch electrode chain 101 and the density of the grid in each second touch electrode chain 102. It can be understood that, by setting the density of the grids in the auxiliary electrode 03 to be larger, that is, by arranging the grids in the auxiliary electrode 03 to be denser, the area of the auxiliary electrode 03 per unit area can be larger, and as can be seen from the above discussion, the present embodiment can improve the reliability of the operation of the touch panel 100 in the mutual-capacitance state and the self-capacitance state. Similarly, the width of the grid in each auxiliary electrode 03 may also be greater than any one of the width of the grid in each first touch electrode chain 101 and the width of the grid in each second touch electrode chain 102, so as to further increase the area of the auxiliary electrode 03 in a unit area.
Embodiments provide a display device, which includes an encapsulation layer, a cover plate, and a touch panel as described above, where the touch panel is located between the encapsulation layer and the cover plate. Furthermore, the display device may further include an array substrate located on a side of the encapsulation layer away from the cover plate, and a polarizer located between the touch panel and the cover plate.
The touch panel and the display device provided by the embodiment of the invention comprise a plurality of first touch electrode chains, a plurality of second touch electrode chains and a plurality of auxiliary electrodes, wherein each first touch electrode chain comprises a plurality of first touch electrodes, each second touch electrode chain comprises a plurality of second touch electrodes, the plurality of second touch electrode chains and the plurality of first touch electrode chains are intersected and arranged in an insulated mode, the plurality of auxiliary electrodes, the plurality of second touch electrode chains and the plurality of first touch electrodes are arranged in an insulated mode, mutual capacitance is formed between the plurality of second touch electrode chains and the plurality of first touch electrode chains when the touch panel is in a mutual capacitance scanning stage, the scheme is that the plurality of auxiliary electrodes are electrically grounded to increase a charge passing through a branch circuit of fingers, the charge is effectively prevented from returning to the touch chip through the touch electrodes, the defect that the charge detected by the touch chip is less is overcome, and the reliability of the touch panel in the mutual capacitance state is improved.
The touch panel and the display device provided by the embodiment of the invention are described in detail, and the principle and the embodiment of the invention are explained by applying specific examples, and the description of the embodiment is only used for helping to understand the technical scheme and the core idea of the invention; those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (9)
1. A touch panel, comprising:
the touch control device comprises a plurality of first touch control electrode chains, a plurality of touch control electrode units and a plurality of touch control electrode units, wherein each first touch control electrode chain comprises a plurality of first touch control electrodes;
each second touch electrode chain comprises a plurality of second touch electrodes, and the second touch electrode chains and the first touch electrode chains are intersected and insulated;
at least one auxiliary electrode chain, each of said auxiliary electrode chains comprising a plurality of auxiliary electrodes;
when the touch panel is in a mutual capacitance scanning stage, mutual capacitance is formed between a plurality of second touch electrode chains and a plurality of first touch electrode chains, each auxiliary electrode chain is insulated from the plurality of second touch electrode chains and the plurality of first touch electrode chains, each auxiliary electrode chain is electrically grounded, and each auxiliary electrode chain corresponds to the corresponding first touch electrode chain or the corresponding second touch electrode chain;
when the touch panel is in a self-capacitance scanning stage, self-capacitance is formed between each of the second touch electrode chains and the first touch electrode chains and the ground, and each of the auxiliary electrode chains is electrically connected with the corresponding first touch electrode chain or the corresponding second touch electrode chain.
2. The touch panel of claim 1, further comprising:
a ground electrode, the ground electrode being electrically grounded;
the first end of each switching module is electrically connected with at least one auxiliary electrode chain, and the second end of each switching module is electrically connected with the grounding electrode, the corresponding first touch electrode chain or the corresponding second touch electrode chain;
when the touch panel is in the mutual capacitance scanning stage, each switching module is in a first state so that the plurality of auxiliary electrodes are electrically connected with the grounding electrode to be grounded, and when the touch panel is in the self-capacitance touch scanning stage, each switching module is in a second state so that each auxiliary electrode chain is electrically connected with the corresponding first touch electrode chain or the corresponding second touch electrode chain.
3. The touch panel according to claim 2, wherein the touch panel comprises a plurality of auxiliary electrode chains, the plurality of auxiliary electrode chains comprises at least one first auxiliary electrode chain and at least one second auxiliary electrode chain, each first auxiliary electrode chain is disposed opposite to the corresponding first touch electrode chain, and each second auxiliary electrode chain is disposed opposite to the corresponding second touch electrode chain;
when the touch panel is in the self-contained scanning stage, each switching module is in the second state so that the corresponding first auxiliary electrode chain is electrically connected with the corresponding first touch electrode chain, and the corresponding second auxiliary electrode chain is electrically connected with the second touch electrode chain.
4. The touch panel of claim 3, wherein each of the first auxiliary electrode chains comprises a plurality of first auxiliary electrodes, each of the second auxiliary electrode chains comprises a plurality of second auxiliary electrodes, the plurality of auxiliary electrodes comprises a plurality of the first auxiliary electrodes and a plurality of the second auxiliary electrodes, and the touch panel further comprises:
the first bridging parts, the first auxiliary electrodes and the second auxiliary electrodes are arranged in different layers, and each first bridging part is electrically connected with the corresponding two first auxiliary electrodes or the corresponding two second auxiliary electrodes.
5. The touch panel of claim 4, further comprising:
the second bridge parts and the first bridge parts are arranged on the same layer, the second bridge parts, the first touch electrodes and the second touch electrodes are arranged on different layers, and each second bridge part is electrically connected with two corresponding second touch electrodes.
6. The touch panel of claim 1, wherein at least one of the first touch electrode chains and the second touch electrode chains comprises a main electrode and branch electrodes located at sides of the main electrode, the branch electrodes are provided with through holes, and the auxiliary electrodes comprise portions located in the through holes.
7. The touch panel of claim 1, further comprising:
the substrate is positioned on the same side of the first touch electrode chains, the second touch electrode chains and the auxiliary electrodes;
the total area of the projections of the auxiliary electrodes on the substrate is larger than any one of the total area of the projections of the first touch electrode chains on the substrate and the total area of the projections of the second touch electrode chains on the substrate.
8. The touch panel of claim 7, wherein each of the first touch electrode chains, each of the second touch electrode chains, and each of the auxiliary electrodes are in a grid shape;
the density of the grids in each auxiliary electrode is greater than any one of the density of the grids in each first touch electrode chain and the density of the grids in each second touch electrode chain.
9. A display device comprising an encapsulation layer, a cover plate, and the touch panel of any one of claims 1 to 8, the touch panel being positioned between the encapsulation layer and the cover plate.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2017187946A (en) * | 2016-04-06 | 2017-10-12 | 富士通株式会社 | Electronic device and touch detection program |
| CN110286804A (en) * | 2019-06-29 | 2019-09-27 | 上海天马有机发光显示技术有限公司 | A kind of display panel and display device |
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| JP4932667B2 (en) * | 2007-10-17 | 2012-05-16 | 株式会社 日立ディスプレイズ | Screen input type image display system |
| US8913021B2 (en) * | 2012-04-30 | 2014-12-16 | Apple Inc. | Capacitance touch near-field—far field switching |
| GB2559646A (en) * | 2017-02-09 | 2018-08-15 | Solomon Systech Ltd | Touch Sensor |
| CN110865737B (en) * | 2019-11-15 | 2021-12-28 | 京东方科技集团股份有限公司 | Touch substrate and display device |
| CN111258462A (en) * | 2020-01-09 | 2020-06-09 | 京东方科技集团股份有限公司 | Touch panel and display device |
| CN112162650B (en) * | 2020-08-12 | 2024-02-23 | 武汉天马微电子有限公司 | Touch panel and display device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2017187946A (en) * | 2016-04-06 | 2017-10-12 | 富士通株式会社 | Electronic device and touch detection program |
| CN110286804A (en) * | 2019-06-29 | 2019-09-27 | 上海天马有机发光显示技术有限公司 | A kind of display panel and display device |
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