CN114253431B - Touch display panel and display device - Google Patents
Touch display panel and display device Download PDFInfo
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- CN114253431B CN114253431B CN202111582764.2A CN202111582764A CN114253431B CN 114253431 B CN114253431 B CN 114253431B CN 202111582764 A CN202111582764 A CN 202111582764A CN 114253431 B CN114253431 B CN 114253431B
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- 229910003460 diamond Inorganic materials 0.000 claims description 2
- 239000010432 diamond Substances 0.000 claims description 2
- 230000035945 sensitivity Effects 0.000 abstract description 15
- 238000001514 detection method Methods 0.000 description 13
- 238000000034 method Methods 0.000 description 8
- 230000009286 beneficial effect Effects 0.000 description 6
- 239000000758 substrate Substances 0.000 description 6
- 230000008859 change Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 4
- 230000000295 complement effect Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 1
- 230000008707 rearrangement Effects 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
- G06F3/0443—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a single layer of sensing electrodes
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
- G06F3/0448—Details of the electrode shape, e.g. for enhancing the detection of touches, for generating specific electric field shapes, for enhancing display quality
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- Position Input By Displaying (AREA)
Abstract
The embodiment of the invention discloses a touch display panel and a display device, wherein the touch display panel comprises: a plurality of first touch electrodes and a plurality of second touch electrodes; the first touch electrode and the second touch electrode are arranged in the same layer and are insulated; the first touch electrode comprises a first electrode connecting part and at least two first electrode branching parts, and each first electrode branching part extends along a first direction and is arranged along a second direction; the first electrode connecting parts are connected with the first electrode branching parts; the first direction intersects the second direction; the second touch electrode is positioned at the gap between two adjacent first touch electrodes arranged along the first direction, one part of the second touch electrode is positioned at the gap between two adjacent first electrode branching parts in one first touch electrode, and the other part of the second touch electrode is positioned at the gap between two adjacent first electrode branching parts in the other first touch electrode. The embodiment of the invention can improve the touch sensitivity of the touch display panel.
Description
Technical Field
The embodiment of the invention relates to the technical field of display, in particular to a touch display panel and a display device.
Background
With the development of display technology, touch display panels with touch functions have been widely used. The touch display panel can be generally divided into a self-capacitance type touch display panel and a mutual capacitance type touch display panel according to a touch electrode arrangement mode and a touch principle in the touch display panel. The mutual capacitance type touch display panel has the advantages of being capable of realizing multi-point touch, being more accurate in touch identification and the like, and is favored by people.
Therefore, how to further improve the touch sensitivity on the premise of simplifying the structure of the mutual capacitive touch display panel becomes a hot topic to be researched currently.
Disclosure of Invention
The embodiment of the invention provides a touch display panel and a display device, which can enable the touch display panel to have a simple structure and higher touch sensitivity on the premise that the touch display panel realizes mutual capacitive touch.
In a first aspect, an embodiment of the present invention provides a touch display panel, including: a plurality of first touch electrodes and a plurality of second touch electrodes; the first touch electrode and the second touch electrode are arranged in the same layer and are insulated;
the first touch electrode comprises a first electrode connecting part and at least two first electrode branch parts, and each first electrode branch part extends along a first direction and is arranged along a second direction; the first electrode connecting parts are connected with the first electrode branch parts; the first direction intersects the second direction;
the second touch electrode is positioned at the gap between two adjacent first touch electrodes arranged along the first direction, one part of the second touch electrode is positioned at the gap between two adjacent first electrode branch parts in one of the first touch electrodes, and the other part of the second touch electrode is positioned at the gap between two adjacent first electrode branch parts in the other one of the first touch electrodes.
In a second aspect, an embodiment of the present invention further provides a display apparatus, including: the display panel.
According to the touch display panel and the display device provided by the embodiment of the invention, the first touch electrode and the second touch electrode are arranged in the same layer and are insulated, so that the touch display panel has a simple film structure, the preparation process of the touch display panel is simplified, and the touch display panel is light and thin; meanwhile, when the second touch electrode is arranged at the gap between two adjacent first touch electrodes arranged along the first direction, the second touch electrode can be respectively positioned at the gap between two adjacent first electrode branching parts in the two adjacent first touch electrodes, so that the second touch electrode and the two first electrode branching parts of the first touch electrode and the first electrode connecting part form mutual capacitance at the same time, the first touch electrode and the second touch electrode at each touch position can generate larger mutual capacitance, and the larger the generated mutual capacitance is, the larger the difference between the detected change amount caused by touch is, and the change amount of capacitance at the position of actual touch and the other positions which are not touched is, so that when a touch object such as a finger touches the touch surface of the touch display panel, the touch position can be accurately detected, and the touch sensitivity of the touch display panel can be improved.
Drawings
Fig. 1 is a schematic top view of a touch display panel according to the related art;
fig. 2 is a schematic top view of a touch display panel according to an embodiment of the present invention;
fig. 3 is an enlarged schematic structural diagram of a touch electrode according to an embodiment of the present invention;
FIG. 4 is a schematic cross-sectional view of a touch display panel along the section A-A in FIG. 3;
FIG. 5 is a schematic cross-sectional view of a touch display panel along the section B-B in FIG. 3;
FIG. 6 is a schematic cross-sectional view of another touch display panel along the section B-B in FIG. 3;
fig. 7 is an enlarged schematic structural diagram of another touch electrode according to an embodiment of the present invention;
fig. 8 is an enlarged schematic structural view of another touch electrode according to an embodiment of the present invention;
fig. 9 is an enlarged schematic structural view of another touch electrode according to an embodiment of the present invention;
fig. 10 is an enlarged schematic structural view of another touch electrode according to an embodiment of the present invention;
fig. 11 is a schematic structural diagram of a display device according to an embodiment of the present invention.
Detailed Description
The invention is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present invention are shown in the drawings.
Before discussing exemplary embodiments in more detail, it should be mentioned that some exemplary embodiments are described as processes or methods depicted as flowcharts. Although a flowchart depicts steps as a sequential process, many of the steps may be implemented in parallel, concurrently, or with other steps. Furthermore, the order of the steps may be rearranged. The process may be terminated when its operations are completed, but may have additional steps not included in the figures. The processes may correspond to methods, functions, procedures, subroutines, and the like.
Currently, the touch driving electrode and the touch sensing electrode in the mutual capacitive touch display panel may be respectively disposed on different film layers, or may also be disposed on the same film layer. In order to simplify the design of the film layer of the touch display panel, the touch driving electrode and the touch sensing electrode are usually disposed in the same film layer. Fig. 1 is a schematic top view structure of a touch display panel of the related art, as shown in fig. 1, a touch display panel 001 is provided with a plurality of touch sensing electrodes 010 and a plurality of touch driving electrodes 020, the touch sensing electrodes 010 in the same row can be electrically connected with each other through a bridge 030, the touch driving electrodes 020 in the same column can be electrically connected with each other through a bridge 040, and the touch sensing electrodes 010 and the touch driving electrodes 020 are mutually coupled to form a capacitor. When a touch object such as a finger touches the touch surface of the touch display panel 001, the touch position of the touch object on the touch surface can be determined by detecting the capacitance change amount between the touch sensing electrode 010 and the touch driving electrode 020.
However, with the arrangement shown in fig. 1, the capacitance formed between the touch sensing electrode 010 and the touch driving electrode 020 is small, and a sensing error is easy to occur, so that a detection error of a touch position is caused, and the touch sensitivity is affected.
In order to solve the above technical problems, an embodiment of the present invention provides a touch display panel, including: a plurality of first touch electrodes and a plurality of second touch electrodes; the first touch electrode and the second touch electrode are arranged in the same layer and are insulated; the first touch electrode comprises a first electrode connecting part and at least two first electrode branching parts, and each first electrode branching part extends along a first direction and is arranged along a second direction; the first electrode connecting parts are connected with the first electrode branch parts; the first direction intersects the second direction; the second touch electrode is positioned at the gap between two adjacent first touch electrodes arranged along the first direction, one part of the second touch electrode is positioned at the gap between two adjacent first electrode branching parts in one first touch electrode, and the other part of the second touch electrode is positioned at the gap between two adjacent first electrode branching parts in the other first touch electrode.
By adopting the technical scheme, the first touch electrode and the second touch electrode are arranged in the same layer and are insulated, so that the touch display panel has a simple film structure, the preparation process of the touch display panel is simplified, and the touch display panel is light and thin; meanwhile, when the second touch electrode is arranged at the gap between two adjacent first touch electrodes arranged along the first direction, the second touch electrode can be respectively positioned at the gap between two adjacent first electrode branching parts in the two adjacent first touch electrodes, so that the second touch electrode and the two first electrode branching parts of the first touch electrode and the first electrode connecting part form mutual capacitance at the same time, the first touch electrode and the second touch electrode at each touch position can generate larger mutual capacitance, and the larger the generated mutual capacitance is, the larger the difference between the detected change amount caused by touch is, and the change amount of capacitance at the position of actual touch and the other positions which are not touched is, so that when a touch object such as a finger touches the touch surface of the touch display panel, the touch position can be accurately detected, and the touch sensitivity of the touch display panel can be improved.
The foregoing is a core point of the embodiment of the present invention, and the technical solutions in the embodiment of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiment of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without making any inventive effort are intended to fall within the scope of the present invention.
Fig. 2 is a schematic top view of a touch display panel according to an embodiment of the present invention, fig. 3 is an enlarged schematic structure of a touch electrode according to an embodiment of the present invention, and fig. 4 is a schematic cross-sectional structure of a touch display panel along A-A section in fig. 3. Referring to fig. 2, fig. 3 and fig. 4, a plurality of first touch electrodes 10 and a plurality of second touch electrodes 20 in the touch display panel 100 are all arranged in the same layer and insulated, so that the touch display panel 100 only includes a layer of touch electrode layer P20 located at one side of a substrate P10, and the touch electrode layer P20 is provided with a first touch electrode 10 and a second touch electrode 20 insulated from each other, so that the first touch electrode 10 and the second touch electrode 20 form a mutual capacitance, and meanwhile, a film structure of the touch display panel 100 can be simplified, thereby facilitating a manufacturing process of the touch display panel 100 and facilitating a light and thin touch display panel 100. The substrate P10 may include a substrate and a pixel function layer disposed on the substrate, and the pixel function layer may include a display unit, a pixel circuit, and the like, which is not particularly limited in the embodiment of the present invention.
It can be understood that, in the embodiment of the present invention, the first touch electrode 10 and the second touch electrode 20 can form a mutual capacitance, in which one touch electrode is a touch driving electrode, the other touch electrode is a touch sensing electrode, the touch driving electrode generally receives a touch scanning signal, and the touch sensing electrode generally feeds back a touch detection signal, so that the capacitance variation of the mutual capacitance formed by the first touch electrode 10 and the second touch electrode 20 at the corresponding position can be obtained through the touch detection signal, thereby obtaining whether the position is touched by a touching object, and realizing detection of the touch position. In the embodiment of the present invention, the first touch electrode 10 may be a touch driving electrode, and the second touch electrode 20 may be a touch sensing electrode; or, when the first touch electrode 10 is a touch sensing electrode, the second touch electrode 20 is a touch driving electrode; the embodiment of the present invention is not particularly limited thereto.
With continued reference to fig. 2 and 3, the first touch electrode 10 includes a first electrode connection portion 11 and at least two first electrode branch portions 12, and each first electrode branch portion 12 extends along a first direction X and is arranged along a second direction Y; the first electrode connection portions 11 connect the first electrode branch portions 12; the second touch electrode 20 is located at a gap between two adjacent first touch electrodes 10 arranged along the first direction X, and a portion of the second touch electrode 20 is located at a gap between two adjacent first electrode branches 12 in one of the first touch electrodes 10, and another portion of the second touch electrode 20 is located at a gap between two adjacent first electrode branches 12 in the other first touch electrode 10. The first direction X and the second direction are two intersecting directions.
For example, taking the first touch electrode 101 and the first touch electrode 102 arranged along the first direction X as an adjacent example, the second touch electrode 20 is disposed at the gap between the first touch electrode 101 and the first touch electrode 102, and a portion of the second touch electrode 20 is located between the two first electrode branches 12 of the first touch electrode 101, and another portion of the second touch electrode 20 is located between the two first electrode branches 12 of the first touch electrode 102, so that the second touch electrode 20 forms a mutual capacitance with the first touch electrode 101 and the first touch electrode 102 at the same time, that is, the second touch electrode 20 forms a mutual capacitance with the four first electrode branches 12 and the two first electrode connections 11, which enables a mutual capacitance formed by the first touch electrode 10 and the second touch electrode 20 to have a larger capacitance. Meanwhile, as the capacitance of the mutual capacitance formed by the first touch electrode 10 and the second touch electrode 20 is larger, the capacitance variation of the mutual capacitance caused by touch can be detected to be larger, so that the difference between the actual touch position and the capacitance variation of the mutual capacitance at other untouched positions is more obvious, when a touch object such as a finger touches the touch surface of the touch display panel 100, the touch position can be accurately detected, and further the touch sensitivity of the touch display panel 100 is improved.
Optionally, fig. 5 is a schematic cross-sectional structure of a touch display panel along a section B-B in fig. 3, and referring to fig. 2, fig. 3 and fig. 5, the touch display panel 100 further includes a plurality of first touch traces 30 and a plurality of second touch traces 40; the plurality of first touch wires 30 are electrically connected with the plurality of first touch electrodes 10 in a one-to-one correspondence manner; the plurality of second touch wires 40 are electrically connected with the plurality of second touch electrodes 20 in a one-to-one correspondence manner; the first touch trace 30 and the second touch trace 40 are disposed on the same layer and are insulated from each other.
For example, when the first touch electrode 10 is a touch driving electrode and the second touch electrode 20 is a touch sensing electrode, the first touch electrode 10 is electrically connected to the driving circuit 50 through the first touch trace 30, so that the touch scanning signal provided by the driving circuit 50 can be transmitted to the first touch electrode 10 through the first touch trace 30 to realize scanning of the first touch electrode 10; meanwhile, the second touch electrode 20 is electrically connected with the driving circuit 50 through the second touch trace 40, and the second touch electrode 20 transmits a touch detection signal sensed by the second touch electrode to the driving circuit 50 through the second touch trace 40, so that the driving circuit 50 can determine the touch position of the touch object based on the touch detection signal. It is understood that, for the case that the first touch electrode 10 is a touch sensing electrode and the second touch electrode 20 is a touch driving electrode, the above procedure is similar, and the description thereof is omitted.
In this way, the first touch trace 30 and the second touch trace 40 are used for transmitting a touch scanning signal and feeding back a touch detection signal so as to realize detection of the touch position of a touch object; meanwhile, the first touch trace 30 and the second touch trace 40 are disposed on the same film layer, which is beneficial to simplifying the film structure of the touch display panel 100, thereby being beneficial to simplifying the manufacturing process of the touch display panel 100 and being beneficial to lightening and thinning the touch display panel 100.
It should be noted that, fig. 5 is only an exemplary film structure diagram of the embodiment of the present invention, and fig. 5 only illustrates, by way of example, that when the first touch trace 30 and the second touch trace 40 are arranged in the same layer, the touch trace layer P30 where the first touch trace 30 and the second touch trace 40 are located is located at a side of the touch electrode layer P20 away from the substrate P10; in the embodiment of the present invention, the touch trace layer P30 where the first touch trace 30 and the second touch trace 40 are located may be further located on a side of the touch electrode layer P20 close to the substrate P10, or may be in other arrangement manners, which is not particularly limited in the embodiment of the present invention.
Alternatively, fig. 6 is a schematic cross-sectional structure of another touch display panel along the section B-B in fig. 3, and referring to fig. 2, 3 and 6, the first touch trace 30 and the second touch trace 40 are disposed on the same layer as the first touch electrode 10 and the second touch electrode 20.
In this way, the first touch trace 30, the second touch trace 40, the first touch electrode 10 and the second touch electrode 20 are all disposed in the touch electrode layer P20, so that the structure for realizing touch is located in the same film layer, and the film layer structure of the touch display panel 100 can be further simplified, thereby being beneficial to simplifying the manufacturing process of the touch display panel 100 and being beneficial to lightening and thinning the touch display panel 100.
Optionally, with continued reference to fig. 6, the width w1 of the first electrode branch 12 in the second direction Y and the width w2 of the second touch electrode 20 in the second direction Y are both greater than the line widths w3 and w4 of the first touch trace 30 and the second touch trace 40.
In this way, by making the first electrode branch portion 12 and the second touch electrode 20 have a larger width in the second direction Y, it is possible to ensure that the first electrode branch portion 12 and the second touch electrode 20 constitute a mutual capacitance having a larger capacitance; and, by making the first touch trace 30 and the second touch trace 40 have smaller widths in the second direction Y, on the premise of satisfying the signal transmission function, the occupied area of the first touch trace 30 and the second touch trace 40 can be reduced, so as to relatively increase the area of the area for setting the first touch electrode 10 and the second touch electrode 20, thereby further improving the touch sensitivity of the touch display panel.
Optionally, in the first touch electrode, a gap between two adjacent first electrode branching parts is a first gap; each first touch electrode is provided with m first gaps; at least part of the second touch electrodes are arranged at each first gap; the area of each first touch electrode and the area of the second touch electrode at the first gap of the first touch electrode are S1; wherein S1 is less than or equal to the size of m fingers; m is a positive integer.
Taking the touch electrode structure shown in fig. 2 and 3 as an example, the first touch electrode 10 includes two first electrode branches 12, and a region between the two first electrode branches 12 is divided into two first gaps by a first electrode connection portion 11; at this time, the first touch electrode 10 and the two second touch electrodes 20 respectively form mutual capacitances, and at this time, the total area of the first touch electrode 10 and the second touch electrode 20 located at the first gap of the first touch electrode 10 is S1 less than or equal to the size of 2 fingers. If the first touch electrode 10 is a touch driving electrode and the second touch electrode 20 is a touch sensing electrode, when a finger touches the touch display panel, providing a touch scanning signal to the first touch electrode 101 and respectively receiving a touch detection signal fed back by the second touch electrode 20 at one side of the first electrode connection part 11 near and far from the first touch electrode 102 in the first touch electrode 101, and if the touch detection signal fed back by the second touch electrode 20 at one side of the first electrode connection part 11 near to the first touch electrode 102 in the first touch electrode 101 is based on the touch detection signal fed back by the second touch electrode 20 at one side of the first electrode connection part 11 near to the first touch electrode 102 in the first touch electrode 101, determining that the capacitance variation of mutual capacitance formed by the second touch electrode 20 at one side of the first electrode connection part 11 near to the first touch electrode 102 in the first touch electrode 101 exceeds the preset capacitance variation, determining that the touch position of the finger overlaps the second touch electrode 20 at one side of the first electrode connection part 11 near to the first touch electrode 102 in the first touch electrode 101; in the same manner, it can be determined whether the touch position of the finger has overlap with the other second touch electrodes 20, thereby determining the touch position of the finger. Meanwhile, since the total area of the first touch electrode 10 and the second touch electrode 20 located at the first gap of the first touch electrode 10 is S1 less than or equal to 2 fingers, when the fingers touch the touch surface of the touch display panel 100, the touch position of the fingers overlaps at least one second touch electrode 20, so that the touch position of the fingers can be accurately determined by the touch detection signals fed back by each first touch electrode 20, and the touch sensitivity of the touch display panel is improved.
It should be understood that fig. 2 and 3 are only exemplary drawings of the embodiment of the present invention, and fig. 2 and 3 show a case where each first touch electrode 10 includes two first electrode branches 12, and in the embodiment of the present invention, the number of first electrode branches in the first touch electrode may be two or more.
Fig. 7 is an enlarged schematic view of another touch electrode according to an embodiment of the present invention, and as shown in fig. 7, the first touch electrode 10 includes three first electrode branches 12, where the three first electrode branches 12 are all connected together by a first electrode connection portion 11; at this time, two second touch electrodes 201 and 202 are disposed at the gaps of two adjacent first touch electrodes 101 and 102 aligned along the first direction X. Wherein, a portion of the second touch electrode 201 is located between the first electrode branching portion 121 and the first electrode branching portion 122 in the first touch electrode 101, and another portion of the second touch electrode 201 is located between the first electrode branching portion 121 and the first electrode branching portion 122 in the first touch electrode 102; a portion of the second touch electrode 202 is located between the first electrode branch 122 and the first electrode branch 123 in the first touch electrode 101, and another portion of the second touch electrode 202 is located between the first electrode branch 122 and the first electrode branch 123 in the first touch electrode 102. In this way, when the number of the first electrode branches 12 in the first touch electrode 10 increases, the number of the second touch electrodes 20 disposed between two adjacent first touch electrodes 10 aligned along the first direction X increases, so that the capacitance of the mutual capacitance formed by the first touch electrode 10 and each second touch electrode 20 can be further increased.
Similarly, when the number of the first electrode branches 12 in the touch electrode 10 increases, the number of the first gaps between two adjacent first electrode branches in the first touch electrode 10 also increases relatively, so that the relationship between the area S1 of the first touch electrode 10 and the area of the second touch electrode 20 located at the first gap of the first touch electrode 10 and the size of the finger can be multiplied, which can also meet the requirement of higher touch sensitivity.
It should be noted that, in the embodiment of the present invention, the number of the first electrode branches in the first touch electrode is not specifically limited. For convenience of description, the technical solution of the embodiment of the present invention is described by taking the example that the first touch electrode includes three first electrode branches.
Alternatively, with continued reference to fig. 7, the first touch electrode 10 has a first symmetrical structure symmetrical along the first symmetry axis Q1; the first symmetry axis Q1 is parallel to the second direction Y. In this way, the first touch electrodes 10 on both sides of the first axis of symmetry Q1 are identical in structure, so that the mutual capacitances formed by the first electrode branching portions 12 and the first electrode connecting portions 11 on both sides of the first axis of symmetry Q1 and the second touch electrodes 20 are kept uniform, thereby keeping the touch sensitivity uniform at each position in the first direction.
Of course, it is understood that the first touch electrode 10 is not only symmetrical along the first symmetry axis Q1 parallel to the second direction Y, but also symmetrical along the symmetry axis parallel to the first direction X, which is not particularly limited in the embodiment of the present invention.
Optionally, with continued reference to fig. 7, the second touch electrode 20 has a second symmetrical structure symmetrical along a second symmetry axis Q21 and a third symmetry axis Q22; wherein the second symmetry axis Q21 is parallel to the first direction X, and the third symmetry axis Q22 is parallel to the second direction Y.
In this way, the structures of the second touch electrodes 20 at two sides of the second symmetry axis Q21 are the same, so that mutual capacitances formed by the second touch electrodes 20 at two sides of the second symmetry axis Q21 and the first touch electrode 10 are kept consistent, and thus touch sensitivity at each position in the second direction is kept consistent; meanwhile, the second touch electrodes 20 on both sides of the third symmetry axis Q22 have the same structure, so that mutual capacitances formed by the second touch electrodes 20 on both sides of the third symmetry axis Q22 and the first touch electrode 10 are kept consistent, and thus touch sensitivity at each position in the first direction can be kept consistent.
Optionally, fig. 8 is an enlarged schematic structural view of another touch electrode according to an embodiment of the present invention, where, as shown in fig. 8, each first electrode branching portion 12 is connected to at least one first electrode branching portion 13 extending along the second direction Y; in the same first touch electrode 10, a gap is formed between the first electrode branching portions 13 connected to two adjacent first electrode branching portions 12, and the first electrode branching portions 13 connected to two adjacent first electrode branching portions are disposed opposite to each other along the second direction Y.
In this way, the second touch electrodes 20 located at the gap between the two adjacent first electrode branching portions 12 can form mutual capacitance with the first electrode branching portions 13 connected with the two adjacent first electrode branching portions at the same time, so that the mutual capacitance formed by each second touch electrode 20 and the first touch electrode 10 has larger capacitance, so that when the touch position of a touch object is detected, the capacitance variation is larger, and the touch display panel has higher touch detection sensitivity.
Optionally, fig. 9 is an enlarged schematic view of a touch electrode according to an embodiment of the present invention, and as shown in fig. 9, the second touch electrode 20 includes a second electrode trunk portion 21 and at least one second electrode bifurcation portion 22; the second electrode trunk 21 extends in the first direction X; the second electrode bifurcated portion 22 extends in the second direction Y; the second electrode trunk portion 21 is connected to each second electrode branch 22 portion; the second electrode trunk portion 21 is located between two adjacent first electrode branch portions 12; the second electrode bifurcated portion 22 is located between the first electrode connecting portion 11 and the first electrode bifurcated portion 13, and/or the second electrode bifurcated portion 22 is located between adjacent two first electrode bifurcated portions 13 connected to the same first electrode bifurcated portion 12. At this time, the second electrode bifurcated portions 22 may have overlapping with the oppositely disposed first electrode bifurcated portions 13, respectively, in the first direction X.
Illustratively, when each first touch electrode 10 includes three first electrode branches 12 (121, 122, 123), four first electrode branches 13 (131 and 132) are connected to each first electrode branch 12, and four second electrode branches 22 (221 and 222) are connected to the second electrode trunk 21 of each second touch electrode 20, the second touch electrode 20 located between the first electrode branch 121 and the first electrode branch 122 of the same first touch electrode 10 is taken as an example. The second electrode branching portion 221 is located between the first electrode branching portion 131 and the first electrode connecting portion 11, which are connected to the first electrode branching portion 121, and between the first electrode branching portion 131 and the first electrode connecting portion, which are connected to the first electrode branching portion 122, and at this time, the second electrode branching portion 221 overlaps the first electrode branching portion 11, the first electrode branching portion 131, which are connected to the first electrode branching portion 121, and the first electrode branching portion 131, which is connected to the first electrode branching portion 122, respectively, in the first direction X, so that the second electrode branching portion 221 and the first electrode branching portion 11, the first electrode branching portion 131, which is connected to the first electrode branching portion 121, and the first electrode branching portion 131, which is connected to the first electrode branching portion 122, can each form a mutual capacitance; for the same reason, the first electrode branch portions 131 and 132, in which the second electrode branch portion 222 is connected to the first electrode branch portion 121, and the first electrode branch portions 131 and 132, in which the first electrode branch portion 122 is connected, can each form a mutual capacitance; meanwhile, in the second direction Y, the second electrode branch portions 222 and 222 each have an overlap with the first electrode branch portions 121 and 122, the first electrode branch portions 131 and 132, to which the second electrode trunk portion 21 is connected with the first electrode branch portion 121, and the first electrode branch portions 131 and 132, to which the first electrode branch portion 122 is connected, each have an overlap, so that the second electrode branch portion 221 and the first electrode branch portions 121 and 122 can form a mutual capacitance, the second electrode branch portion 222 and the first electrode branch portions 121 and 122 can also form a mutual capacitance, and the first electrode branch portions 131 and 132, to which the second electrode trunk portion 21 is connected with the first electrode branch portion 121, and the first electrode branch portions 131 and 132, to which the first electrode branch portion 122 is connected, can also form a mutual capacitance; in this way, the capacitance of the mutual capacitance formed by the first touch electrode 10 and each second touch electrode 20 is further increased, so that the touch sensitivity of the touch display panel can be further improved.
It should be noted that fig. 8 and 9 only show that each first electrode branching portion 12 of the first touch electrode 10 is connected to four first electrode branching portions 13, and the number of first electrode branching portions connected to each first electrode branching portion is not particularly limited in the embodiment of the present invention. Similarly, fig. 9 only illustrates that the second electrode trunk portion 21 of the second touch electrode 20 is connected to four second electrode branch portions 22, and the number of second electrode branch portions connected to each second electrode trunk portion is not particularly limited in the embodiment of the present invention.
It will be appreciated that, as shown in fig. 9, when the shape of the first electrode bifurcation 13 is rectangular, the shape of the second electrode bifurcation 22 may also be rectangular, so that the first electrode bifurcation 13 and the second electrode bifurcation 22 form a complementary structure, and thus the mutual capacitance formed by the first electrode bifurcation 13 and the second electrode bifurcation 22 overlapping in the first direction X can have a larger capacitance; alternatively, as shown in fig. 10, when the shape of the first electrode bifurcated portion 13 is a triangle, the shape of the second electrode bifurcated portion 22 may be a diamond shape, so that the second electrode bifurcated portion 22 can form a complementary structure with the two first electrode bifurcated portions 13 disposed opposite to each other, respectively. On the premise that the second electrode bifurcation part and the two first electrode bifurcation parts which are arranged oppositely form complementary structures, the shapes of the first electrode bifurcation part and the second electrode bifurcation part are not particularly limited in the embodiment of the invention.
Based on the same inventive concept, an embodiment of the present invention further provides a display device, and fig. 11 is a schematic structural diagram of the display device provided by the embodiment of the present invention, and as shown in fig. 11, the display device 200 may include the touch display panel 100 provided by the embodiment of the present invention. The display apparatus 200 may include, but is not limited to, a display of a cell phone, a notebook computer, a wearable device (e.g., a wristwatch, a bracelet, etc.), and other non-portable devices, etc.
The display device provided by the embodiment of the invention comprises the touch display panel provided by any embodiment of the invention, so that the display device provided by the embodiment of the invention comprises the corresponding functional module of the touch display panel, and the beneficial effects of the touch display panel provided by the embodiment of the invention can be achieved. Technical details not described in detail in the above embodiments may be referred to the above description of the touch display panel provided in the embodiments of the present invention.
Note that the above is only a preferred embodiment of the present invention and the technical principle applied. 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, while the invention has been described in connection with the above embodiments, the invention is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the invention, which is set forth in the following claims.
Claims (12)
1. A touch display panel, comprising: a plurality of first touch electrodes and a plurality of second touch electrodes; the first touch electrode and the second touch electrode are arranged in the same layer and are insulated;
the first touch electrode comprises a first electrode connecting part and at least two first electrode branch parts, and each first electrode branch part extends along a first direction and is arranged along a second direction; the first electrode connecting parts are connected with the first electrode branch parts; the first direction intersects the second direction;
the second touch electrode is positioned at a gap between two adjacent first touch electrodes arranged along the first direction, one part of the second touch electrode is positioned at a gap between two adjacent first electrode branch parts in one of the first touch electrodes, and the other part of the second touch electrode is positioned at a gap between two adjacent first electrode branch parts in the other one of the first touch electrodes;
the second touch electrode does not have a bridging portion.
2. The touch display panel of claim 1, wherein the first touch electrode has a first symmetrical structure that is symmetrical along a first symmetry axis; the first symmetry axis is parallel to the second direction.
3. The touch display panel of claim 1, wherein the second touch electrode has a second symmetrical structure symmetrical along a second symmetry axis and a third symmetry axis; the second symmetry axis is parallel to the first direction, and the third symmetry axis is parallel to the second direction.
4. The touch display panel according to claim 1, wherein in the first touch electrode, a gap between two adjacent first electrode branching portions is a first gap; each first touch electrode is provided with m first gaps; at least part of the second touch electrodes are arranged at each first gap;
the area of each first touch electrode and the area of the second touch electrode at the first gap of the first touch electrode are S1; wherein S1 is less than or equal to the size of m fingers; m is a positive integer.
5. The touch display panel according to claim 1, wherein at least one first electrode branch portion extending in the second direction is connected to each of the first electrode branch portions;
in the same first touch electrode, a gap is formed between the first electrode bifurcation parts connected with two adjacent first electrode bifurcation parts, and the first electrode bifurcation parts connected with two adjacent first electrode bifurcation parts are opposite to each other along the second direction.
6. The touch display panel of claim 5, wherein the second touch electrode comprises a second electrode stem and at least one second electrode bifurcation; the second electrode trunk extends in the first direction; the second electrode crotch extends in the second direction; the second electrode trunk part is connected with each second electrode bifurcation part;
the second electrode trunk part is positioned between two adjacent first electrode branch parts;
the second electrode branch portion is located between the first electrode connecting portion and the first electrode branch portion, and/or the second electrode branch portion is located between two adjacent first electrode branch portions connected with the same first electrode branch portion.
7. The touch display panel according to claim 6, wherein the second electrode branch portions respectively overlap with the first electrode branch portions disposed opposite thereto in the first direction.
8. The touch display panel according to claim 7, wherein the first electrode crotch and the second electrode crotch are each rectangular in shape;
alternatively, the first electrode crotch is triangular in shape, and the second electrode crotch is diamond in shape.
9. The touch display panel of claim 1, further comprising: a plurality of first touch traces and a plurality of second touch traces;
the plurality of first touch control wires are electrically connected with the plurality of first touch control electrodes in a one-to-one correspondence manner; the plurality of second touch control wires are electrically connected with the plurality of second touch control electrodes in a one-to-one correspondence manner;
the first touch control wiring and the second touch control wiring are arranged on the same layer and are mutually insulated.
10. The touch display panel of claim 9, wherein the first touch trace and the second touch trace are both co-layer with the first touch electrode and the second touch electrode.
11. The touch display panel of claim 10, wherein a width of the first electrode branch portion in the second direction and a width of the second touch electrode in the second direction are both greater than line widths of the first touch trace and the second touch trace.
12. A display device, comprising: the touch display panel of any one of claims 1-11.
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| CN202111582764.2A CN114253431B (en) | 2021-12-22 | 2021-12-22 | Touch display panel and display device |
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