CN115657882A - Display panel and display device - Google Patents

Abstract

The embodiment of the invention discloses a display panel and a display device, comprising a substrate; the touch electrode unit is positioned on one side of the substrate and arranged in a matrix manner along a first direction and a second direction, the touch electrode unit comprises a first touch electrode and a second touch electrode which are insulated from each other, and the first direction and the second direction are crossed; the first touch electrode comprises a first electrode trunk and at least one first annular electrode, the first electrode trunk extends along a first direction, and the first annular electrode is electrically connected with the first electrode trunk; the second touch electrode comprises a second electrode trunk and at least one second annular electrode, the second electrode trunk extends along a second direction, and the second annular electrode is electrically connected with the second electrode trunk; the first and second ring electrodes are alternately arranged along a third direction, which intersects both the first and second directions. The invention provides a design of a quasi-annular touch control electrode unit, which effectively improves the touch control sensitivity of a display device.

Description

Display panel and display device

Technical Field

The present invention relates to the field of display technologies, and in particular, to a display panel and a display device.

Background

In recent years, with the rapid development of digital information and wireless mobile communication technologies, in order to achieve the purposes of portability and light weight, the input mode of many electronic products, such as mobile phones, etc., has been changed from the traditional input mode using a keyboard or a mouse, etc., to the input mode using a touch screen as an input device. Because the user can directly operate and give instructions through the objects displayed on the screen, the touch screen provides a humanized operation interface between the user and the electronic product.

In order to integrate a touch function on a display panel, a touch electrode needs to be added to the display panel. However, the inventor of the present application finds that, in the existing display panel, the relative area of two adjacent touch electrodes is small, so that the influence of the touch of the user on the capacitance formed by the two adjacent touch electrodes is small, and further, the touch sensitivity is not high.

Disclosure of Invention

In view of the above, the present invention provides a display panel and a display device, which can improve the touch sensitivity of the display panel and the display device.

In one aspect, the present invention provides a display panel comprising:

a substrate;

the touch electrode units are positioned on one side of the substrate and arranged in a matrix manner along a first direction and a second direction, each touch electrode unit comprises a first touch electrode and a second touch electrode which are insulated from each other, and the first direction and the second direction are crossed;

the first touch electrode comprises a first electrode trunk and at least one first annular electrode, the first electrode trunk extends along a first direction, and the first annular electrode is electrically connected with the first electrode trunk;

the second touch electrode comprises a second electrode trunk and at least one second annular electrode, the second electrode trunk extends along a second direction, and the second annular electrode is electrically connected with the second electrode trunk;

the first and second ring electrodes are alternately arranged along a third direction, which intersects both the first and second directions.

In another aspect, the present invention provides a display device, including:

the display panel of the first aspect.

Compared with the prior art, the display panel and the display device provided by the invention have the following beneficial effects that: by arranging a plurality of touch electrode units which are arranged in a matrix along a first direction and a second direction, the first touch electrode comprises a first electrode trunk and at least one first annular electrode which are electrically connected, the second touch electrode comprises a second electrode trunk and at least one second annular electrode which are electrically connected, and the first annular electrode and the second annular electrode are alternately arranged along a third direction. Therefore, the invention provides a design of a quasi-annular touch control electrode unit, and compared with the prior art, the first touch control electrode and the second touch control electrode in the invention have larger relative areas, so that the influence of the touch of a user on the capacitance formed by the first touch control electrode and the second touch control electrode is increased, and the touch control sensitivity of the display device can be effectively improved when the display panel is applied to the display device.

Drawings

Fig. 1 is a schematic diagram of a display panel according to an embodiment of the present invention;

FIG. 2 is an enlarged schematic view of the touch electrode unit in FIG. 1;

FIG. 3 is a schematic edge view of a supplemental electrode provided in accordance with an embodiment of the present invention;

FIG. 4 is another enlarged schematic view of the touch electrode unit in FIG. 1;

FIG. 5 is a schematic diagram of another enlarged touch electrode unit shown in FIG. 1;

FIG. 6 is a schematic diagram of another enlarged touch electrode unit shown in FIG. 1;

FIG. 7 is an enlarged view of a portion of region Q2 of FIG. 2;

FIG. 8 is another enlarged partial view of region Q2 of FIG. 2;

FIG. 9 is a schematic diagram of another enlarged touch electrode unit shown in FIG. 1;

FIG. 10 is an enlarged view of a portion of the area Q1 of FIG. 1;

FIG. 11 is a schematic diagram of another display panel provided in an embodiment of the invention;

FIG. 12 is an enlarged partial view of region Q3 of FIG. 11;

FIG. 13 is another enlarged partial view of region Q3 of FIG. 11;

FIG. 14 is a further enlarged fragmentary view of region Q3 of FIG. 11;

fig. 15 is a schematic diagram of a display device according to an embodiment of the invention.

Detailed Description

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the invention. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

It should be understood that the preferred embodiments described below are only for illustrating and explaining the present invention and are not to be used for limiting the present invention. And the embodiments and features of the embodiments in the present application may be combined with each other without conflict. Also, the shapes and sizes of the various elements in the drawings are not to scale, but are merely illustrative of the present invention.

In order to better understand the technical solutions of the present invention, the following detailed descriptions of the technical solutions of the present invention are provided with the accompanying drawings and specific embodiments, and it should be understood that the specific features in the embodiments and examples of the present invention are detailed descriptions of the technical solutions of the present invention, and are not limitations of the technical solutions of the present invention, and the technical features in the embodiments and examples of the present invention may be combined with each other without conflict.

According to the display panel and the display device provided by the invention, the plurality of touch electrode units are arranged in a matrix manner along the first direction and the second direction, the first touch electrode comprises a first electrode trunk and at least one first annular electrode which are electrically connected, the second touch electrode comprises a second electrode trunk and at least one second annular electrode which are electrically connected, and the first annular electrode and the second annular electrode are alternately arranged along the third direction. The invention provides a design of a ring-like touch electrode unit, and compared with the prior art, the first touch electrode and the second touch electrode in the invention have larger relative areas, so that the influence of the touch of a user on the capacitance formed by the first touch electrode and the second touch electrode is increased, and the touch sensitivity of the display device can be effectively improved when the display panel is applied to the display device.

Referring to fig. 1 and fig. 2, fig. 1 is a schematic view of a display panel according to an embodiment of the present invention; fig. 2 is an enlarged schematic view of the touch electrode unit in fig. 1. The display panel includes: a substrate (not shown in the figure); the touch electrode unit TS is positioned on one side of the substrate and is arranged in a matrix manner along a first direction X and a second direction Y, the touch electrode unit TS comprises a first touch electrode 10 and a second touch electrode 20 which are insulated from each other, and the first direction X is crossed with the second direction Y; the first touch electrode 10 includes a first electrode stem 101 and at least one first annular electrode 102, the first electrode stem 101 extends along a first direction, and the first annular electrode 102 is electrically connected to the first electrode stem 101; the second touch electrode 20 includes a second electrode trunk 201 and at least one second ring-shaped electrode 202, the second electrode trunk 201 extends along the second direction Y, and the second ring-shaped electrode 202 is electrically connected to the second electrode trunk 201; the first and second ring electrodes 102 and 202 are alternately arranged along a third direction Z, which intersects both the first direction X and the second direction Y.

It should be noted that, the embodiment of the present invention is described by taking an example in which the touch electrode units TS are in four rows and five columns, and in an actual product, the number of the touch electrode units TS included in the display panel may be designed according to actual requirements. In addition, the first touch electrode 10 and the second touch electrode 20 are filled with different patterns, which are only for better illustrating the position relationship between the two, and are not used as a limitation on the materials of the two sub-touch electrodes.

It is understood that the plurality of first touch electrodes 10 may form a first touch electrode bar G1 along the first direction X, the plurality of second touch electrodes 20 may form a second touch electrode bar G2 along the second direction Y, and the display panel may include the plurality of first touch electrode bars G1 and the plurality of second touch electrode bars G2. The first touch electrode strip G1 and the second touch electrode strip G2 are electrically connected with the touch chip through the touch trace. When the display panel is used for touch operation, the first touch electrode 10 may be used as a touch driving electrode, and the second touch electrode 20 may be used as a touch sensing electrode, or the second touch electrode 20 may be used as a touch driving electrode, and the first touch electrode 10 is used as a touch sensing electrode, which is not limited in the embodiment of the present invention. However, for convenience of understanding and explanation, the embodiment of the invention is explained by taking the first touch electrode 10 as the touch driving electrode and the second touch electrode 20 as the touch sensing electrode as an example.

In addition, the first direction X may be a row direction, such as parallel to the extending direction of the scan lines in the display panel, and the second direction Y may be a column direction, such as parallel to the extending direction of the data lines in the display panel. Of course, the first direction X may also be a column direction, such as parallel to the extending direction of the data lines in the display panel, and the second direction X may also be a row direction, such as parallel to the extending direction of the scan lines in the display panel. And the third direction Z intersects both the first direction X and the second direction Y, that is, the third direction Z may be any direction other than the first direction X and the second direction Y.

It should be noted that the first touch electrode 10 and the second touch electrode 20 may be disposed on the same layer or different layers. When the first touch electrodes 10 and the second touch electrodes 20 are arranged in different layers, a bridge connection portion is not required to be arranged in the same first touch electrode 10 or between two adjacent first touch electrodes 10, and the first touch electrodes can be directly electrically connected through the first electrode trunk 101. Similarly, in the same second touch electrode 20 or between two adjacent second touch electrodes 20, a bridge-crossing connection portion is not required to be arranged for connection, and the second electrode trunk 201 can be directly electrically connected. Therefore, the manufacturing process of the display panel can be simplified, the process efficiency is improved, and the cost is reduced. When the first touch electrode 10 and the second touch electrode 20 are disposed on the same layer, the same layer may be patterned, so as to reduce the thickness of the display panel and achieve the lightness of the display panel. However, it is necessary to provide a bridging connection portion to achieve electrical connection between the same first touch electrode 10 or two adjacent first touch electrodes 10, or to achieve electrical connection between the same second touch electrode 20 or two adjacent second touch electrodes 20. The present invention is described by taking only the case where the same first touch electrode 10 needs to be electrically connected to each other by a bridge connection portion.

It is understood that the orthographic projection of the first ring-shaped electrode 102 and the second ring-shaped electrode 202 on the plane of the substrate in the present invention may be a circular ring shape, a ring-like shape, a closed ring shape, or a ring shape having at least one opening.

Referring to fig. 2, the first touch electrode 10 and the second touch electrode 20 are disposed on the same layer for illustration. Therefore, in the same touch electrode unit TS, the first touch electrode 10 includes the first electrode trunk 101 and at least one first annular electrode 102, and the second touch electrode 20 includes the second electrode trunk 201 and at least one first annular electrode 202, and since the first touch electrode 10 and the second touch electrode 20 are disposed on the same layer, the first electrode trunk 101 and the first annular electrode 102 of the first touch electrode 10 and the second electrode trunk 201 and the second annular electrode 202 of the second touch electrode 20 are mutually separated. That is, the first electrode trunk 101 includes a first electrode trunk section 101a and a first electrode trunk section 101b located at two sides of the second electrode trunk 201, and the first electrode trunk section 101a and the first electrode trunk section 101b both extend along the first direction X; the first ring electrode 102 includes a first ring electrode segment 102a and a first ring electrode segment 102b located at two sides of the second electrode trunk 201. The second electrode trunk 201 includes a second electrode trunk segment 201a and a second electrode trunk segment 201b located at two sides of the first electrode trunk 101, and both the second electrode trunk segment 201a and the second electrode trunk segment 201b extend along the second direction Y; the second ring-shaped electrode 202 includes a second ring-shaped electrode sub-segment 202a and a second ring-shaped electrode sub-segment 202b located at two sides of the first electrode trunk 101.

Referring to fig. 2, since the first touch electrode 10 needs to be provided with a bridge connection portion for electrical connection, and the second touch electrode 20 can be electrically connected through the connection portion 203 provided on the same layer, the shape of the connection portion 203 may be set according to the shape of the first annular electrode 102 adjacent to the connection portion 203. Accordingly, the shape of the connection portion 203 may be set to be circular or elliptical, so that the relative area of the first touch electrode 10 and the second touch electrode 20 is increased to some extent, and the sensitivity of the display device is improved. In addition, in fig. 2, only the first touch electrode 10 includes two first ring electrodes 102, and the second touch electrode 20 includes one second ring electrode 202, which is taken as an example for description, and is not limited to the number of the first ring electrodes and the second ring electrodes, and the number of the first ring electrodes and the second ring electrodes included in the display panel may be designed according to actual requirements.

Specifically, with continued reference to fig. 2, an embodiment of the invention provides a quasi-annular touch electrode unit design, in which a plurality of touch electrode units TS are arranged in a matrix along a first direction X and a second direction Y, the first touch electrode 10 includes a first electrode stem 101 and at least one first annular electrode 102 that are electrically connected, the second touch electrode 20 includes a second electrode stem 201 and at least one second annular electrode 202 that are electrically connected, and the first annular electrode 102 and the second annular electrode 202 are alternately arranged along a third direction Z. The first annular electrode 102 and the second annular electrode 202 which are alternately arranged and are annular increase the relative area of the first touch electrode 10 and the second touch electrode 20, so that the influence of the touch of a user on the capacitance formed by the first touch electrode 10 and the second touch electrode 20 is increased, and the sensitivity of the display device can be effectively improved when the display panel is applied to the display device.

In some optional embodiments, with continued reference to fig. 2, the touch electrode unit TS is in a symmetrical structure along a symmetry axis L1 parallel to the first direction X; and/or the touch electrode unit TS is in a symmetrical structure along a symmetry axis L2 parallel to the second direction Y. That is, the touch electrode unit TS may be in a symmetrical structure along the symmetry axis L1; or, the touch electrode unit TS may be in a symmetrical structure along the symmetry axis L2; or, the touch electrode unit TS is symmetric along the symmetry axis L1 and symmetric along the symmetry axis L2.

In this embodiment, the touch electrode units TS are arranged to be of a symmetrical structure, so that mutual capacitance values between the touch driving electrodes and the touch sensing electrodes can be effectively improved, mutual capacitance electric fields in the whole display panel are distributed more uniformly, and the improvement of resolution and accuracy of touch position detection is facilitated.

In some alternative embodiments, with continued reference to fig. 1 and 2, the second touch electrode 20 includes a supplemental electrode 204, and the first ring-shaped electrode 102 and the second ring-shaped electrode 202 are located in the supplemental electrode 204 along a direction perpendicular to a plane of the substrate (not shown in the figure).

It is understood that the display panel may be a flexible display panel or a rigid display panel. Accordingly, the substrate may be a flexible substrate such as at least one material selected from polyimide, polyethylene naphthalate, polycarbonate, polyurethane, polydimethylene siloxane, rubber, and polyethylene terephthalate; but may also be a rigid substrate such as glass. The direction perpendicular to the plane of the substrate may be a thickness direction of the display panel or a direction perpendicular to a light exit surface of the display panel.

In order to increase the mutual capacitance between the touch driving electrodes and the touch sensing electrodes, the supplemental electrodes 204 may be disposed on the side of the outermost first ring-shaped electrode 102 included in the first touch electrode 20, which is far away from the touch electrode unit TS, and the inner edges of the supplemental electrodes 204 may be disposed in an arc shape or an arc-like shape, so as to match the shape of the adjacent first ring-shaped electrode 102. Also, the supplemental electrode 204 may have an edge extending in the second direction Y, and the edge may be linear or substantially linear. Referring to fig. 3, fig. 3 is an edge schematic view of the supplemental electrode provided by the embodiment of the invention, where the straight line La, the straight line Lb, and the straight line Lc can be considered as extending along the second direction Y. The edge may be an edge of the touch electrode unit TS parallel to the second direction, and is located on two sides of the touch electrode unit TS along the first direction X. That is, the outer edges of the supplemental electrodes 204 may be arranged in a line shape.

The first touch electrode 10 and the second touch electrode 20 are still disposed on the same layer for illustration. Therefore, in the same touch electrode unit TS, the complementary electrode 204 of the second touch electrode 20 is divided by the first electrode trunk 101 of the first touch electrode 10 into two parts, which are respectively located at two sides of the first electrode trunk 101, and both the two parts are electrically connected to the second electrode trunk 201.

In the embodiment of the present invention, by providing the supplemental electrode 204, the effective space of the display panel can be fully utilized, the mutual capacitance value between the first touch electrode 10 and the second touch electrode 20 is increased, and the touch sensitivity of the display device is improved.

In some optional embodiments, referring to fig. 4, fig. 5 and fig. 6, fig. 4 is another enlarged schematic view of the touch electrode unit in fig. 1, fig. 5 is another enlarged schematic view of the touch electrode unit in fig. 1, and fig. 6 is another enlarged schematic view of the touch electrode unit in fig. 1. The first annular electrode 102 adjacent to the supplemental electrode 204 is a first outer annular electrode 103, and the first outer annular electrode 103 further includes at least one corner electrode 103a; the corner electrode 103a extends in a fourth direction W1 (or a fourth direction W2) and is located on a side of the first outer ring electrode 103 away from the second ring electrode 202, and the fourth direction W1 (or the fourth direction W2) intersects both the first direction X and the second direction Y.

It should be noted that, since the supplemental electrode 204 of one touch electrode unit TS is divided into four sub-portions by the first ring electrode 102 (i.e. the first outer ring electrode 103) adjacent to the supplemental electrode 204, and the four sub-portions are respectively located at four corners of the touch electrode unit TS, the first outer ring electrode 103 may include at least one corner electrode 103a corresponding to the sub-portion of the supplemental electrode 204 adjacent thereto. The corner electrode 103a extending in the fourth direction may be understood as the corner electrode 103a extending in the fourth direction W1 or in the fourth direction W2, the fourth direction W1 intersecting both the first direction X and the second direction Y, and the fourth direction W2 intersecting both the first direction X and the second direction Y. And the fourth direction may be the same as the third direction, i.e., along the fourth direction, the first and second ring electrodes 102 and 202 are still alternately arranged. The corner electrode 103a extending in the fourth direction may also be understood as the first outer ring electrode 103 having convex portions extending to the four corners of the touch electrode unit TS. It is to be understood that the fourth direction is introduced in the present invention only for convenience of explanation of the diagonal electrodes.

Specifically, according to the invention, the first annular electrode 102 adjacent to the supplemental electrode 204 is configured to include the corner electrode 103a, and the corner electrode 103a extends along the fourth direction and is located on the side of the first outer annular electrode 103 away from the second annular electrode 202, so that the mutual capacitance signal amount at four corners of the touch electrode unit TS can be increased, the mutual capacitance value between the first touch electrode 10 and the second touch electrode 10 is further effectively improved, the distribution of the mutual capacitance electric field lines is more uniform, and the resolution and the accuracy of detecting the touch position are further improved.

In some alternative embodiments, referring to fig. 4, 5 and 6, an acute angle sandwiched between the fourth direction W1 (or the fourth direction W2) and the first direction X is equal to an acute angle sandwiched between the fourth direction W1 (or the fourth direction W2) and the second direction Y.

Specifically, an acute angle included between the fourth direction W1 and the first direction X is equal to an acute angle included between the fourth direction W1 and the second direction Y, that is, an acute angle included between the fourth direction W1 and the first direction X is equal to 45 °, and an acute angle included between the fourth direction W1 and the second direction Y is equal to 45 °. An acute angle included between the fourth direction W2 and the first direction X is equal to an acute angle included between the fourth direction W2 and the second direction Y, that is, an acute angle included between the fourth direction W2 and the first direction X is equal to 45 °, and an acute angle included between the fourth direction W2 and the second direction Y is equal to 45 °. In other words, if the touch electrode unit TS is square, the extending direction of the corner electrodes 103 is parallel to the diagonal line of the touch electrode unit TS. So set up, can be so that mutual capacity electric field line distributes more evenly, be favorable to improving the resolution ratio and the precision of detecting the touch position more.

In some alternative embodiments, referring to fig. 5 and 6, the display panel further includes a first dummy electrode 40, and the corner electrode 103a at least partially surrounds the first dummy electrode 40.

It is understood that the display panel generally includes a substrate and a thin film transistor array layer located on one side of the substrate, an organic light emitting device layer located on one side of the thin film transistor array layer away from the substrate, and a Thin Film Encapsulation (TFE) layer located on one side of the organic light emitting device layer away from the substrate, and the touch electrode unit is located on one side of the thin film encapsulation layer away from the substrate. The thin film transistor array layer comprises an active layer, a grid electrode insulating layer, a first metal layer, an interlayer insulating layer and a second metal layer; the organic light-emitting device layer comprises an anode layer, a light-emitting layer and a cathode layer; the display panel further comprises a planarization layer between the second metal layer and the anode layer, a Pixel Definition Layer (PDL) on a side of the anode layer remote from the substrate.

Since the cathode transmits a low power supply voltage signal (PVEE) and is closer to the touch electrode unit, there is a larger crosstalk between the two. Therefore, the first dummy electrode 40 is added in the pattern of the touch electrode unit TS according to the pattern shape, and the first dummy electrode 40 floats (floating) and is not electrically connected to the first touch electrode 10 and the second touch electrode 20, so that the area ratio of the first touch electrode 10 to the second touch electrode 20 in the touch electrode unit TS is reduced, and the purpose of reducing crosstalk is achieved. In other words, the first dummy electrode 40 can shield and disperse the interference signals or other noise signals thereunder, thereby effectively controlling the capacitance and improving the touch sensitivity.

It is understood that each first dummy electrode 40 may extend along a specific angle within the touch electrode unit TS. For example, the extending direction of the first dummy electrode 40 may be 45 degrees to an acute angle included between the data line and the scan line in the display panel. Therefore, the interference of signals below the thin film packaging layer on touch signals can be reduced as much as possible, and the touch stability and sensitivity are enhanced.

It is understood that the shape of the first dummy electrode 40 in the embodiment of the present invention may be a circular arc, a circle, a rectangle, or a hexagon. In an embodiment, the first dummy electrode 40 may further include a plurality of sub-dummy electrodes (not shown), and each sub-dummy electrode is spaced apart from another sub-dummy electrode. Specifically, according to the requirement of the interference signal, the sub dummy electrodes may be subdivided from the inside of each dummy electrode 40 to subdivide the first dummy electrode 40, which is, for example, a rectangle, into independent sub dummy electrodes, or the sub dummy electrodes may be subdivided from the inside of each first dummy electrode 40 to reduce the signal interference between the signals below the touch film encapsulation layer and the touch signals.

In some alternative embodiments, referring to fig. 7 and 8, fig. 7 is an enlarged view of a portion of region Q2 of fig. 2; fig. 8 is another partially enlarged view of the region Q2 in fig. 2. The first touch electrode 10 and the second touch electrode 20 are comb-shaped or wavy at the intersection.

In this embodiment, the first touch electrode 10 and the second touch electrode 20 are comb-shaped or wavy at the intersection, and the plurality of comb-shaped structures or wavy structures at the intersection of the first touch electrode 10 and the second touch electrode 20 are embedded with each other, so as to increase the length of the slit between the first touch electrode 10 and the second touch electrode 20 to a certain extent, and further increase the mutual capacitance generated between the first touch electrode 10 and the second touch electrode 20 corresponding to each touch point. The larger the mutual capacitance is, the larger the capacitance variation of the mutual capacitance caused by touch is under the touch of the same degree, so that the change of the mutual capacitance caused by touch can have obvious difference, the touch position can be accurately judged, and the detection sensitivity of the touch position is improved.

In some optional embodiments, referring to fig. 1-2, fig. 4-6, and fig. 9, fig. 9 is a further enlarged schematic view of the touch electrode unit in fig. 1. The display panel further includes a bridge-spanning connection portion 30, the first touch electrode 10 and the second touch electrode 20 are in the same layer, and the same first annular electrode 102 includes at least two first sub-annular electrodes 102a located at two sides of the second electrode main portion 201, and two adjacent first sub-annular electrodes 102a are electrically connected through the bridge-spanning connection portion 30.

It should be noted that, when the first touch electrode 10 and the second touch electrode 20 are disposed on the same layer, the present invention is described by taking only the case where the bridging connection portion 30 needs to be disposed in the same first touch electrode 10 to achieve electrical connection.

The bridging portion 30 may be made of a light-transmitting material such as indium tin oxide. Since the bridge-spanning connection portion 30 is a transparent bridge-spanning connection, the light emitted from the sub-pixels is not blocked by the bridge-spanning connection portion 30. The bridge-crossing portion 30 may also be a metal bridge, and when electrostatic discharge occurs due to accumulation of electrostatic charges, since the bridge-crossing portion 30 is made of metal, the risk that the bridge-crossing portion 30 is broken down by electrostatic current can be reduced, so that the connection reliability of the inside of the first touch electrode 10 is improved, that is, the connection reliability of the first touch electrode strip G1 is also improved, and further, the touch accuracy is improved.

Fig. 1-2 and fig. 4-6 illustrate two bridging connection portions 30 disposed in the same first touch electrode 10, and fig. 9 illustrates four bridging connection portions 30 disposed in the same first touch electrode 10. It will be appreciated that the number of bridging links 30 and their width may be designed according to practical requirements.

In some optional embodiments, the first touch electrode 10 and the second touch electrode 20 are both transparent electrodes or metal mesh electrodes.

The first touch electrode 10 and the second touch electrode 20 may be transparent electrodes, such as at least one of indium tin oxide, indium zinc oxide, cadmium tin oxide, and indium gallium zinc oxide. Since the transparent electrode can allow more light to pass through, the first touch electrode 10 and the second touch electrode 20 are both transparent electrodes, which can reduce light loss of the display panel and avoid affecting the display effect of the display panel.

The first touch electrode 10 and the second touch electrode 20 may be both metal mesh electrodes. Because the metal material is opaque, the first touch electrode 10 and the second touch electrode 20 can be set to be a grid structure, and the orthographic projections of the first touch electrode 10 and the second touch electrode 20 on the plane of the substrate are located in the orthographic projection of the non-opening area of the pixel on the plane of the substrate, that is, each mesh in the first touch electrode 10 and the second touch electrode 20 corresponds to the opening area of the sub-pixel. By adopting the arrangement mode, the first touch electrode 10 and the second touch electrode 20 can be prevented from shielding light emitted by the pixels, and the first touch electrode 10 and the second touch electrode 20 can be prevented from being visible by human eyes, so that normal display is prevented from being influenced. In addition, the surface resistance value of the metal material is lower, and on the premise of achieving the same touch precision, the surface resistance value of the electrode can be reduced to a certain extent, namely, the load is reduced, and further the power consumption generated in the touch process is reduced. In addition, the metal material has good ductility and toughness, and can be applied to a flexible display panel to realize bending or folding of the display panel.

In some alternative embodiments, referring to FIG. 10, FIG. 10 is an enlarged view of a portion of region Q1 of FIG. 1. Along the first direction X, a second dummy electrode 50 is disposed between two adjacent touch electrode units TS.

It can be understood that, along the first direction X, the boundary of two adjacent touch electrode units TS may be linear, zigzag, or wavy. In the present invention, only the boundary is described as a wave shape.

In the embodiment of the present invention, the second dummy electrode 50 is disposed between the adjacent touch electrode units TS in the first direction X, so that the electrode patterns between the upper and lower touch electrode units TS can be isolated, and the short circuit between the second touch electrodes 20 can be prevented, thereby improving the touch effect.

It can be understood that dummy electrodes may also be disposed between the connection portion 203 and the first annular electrode 102, between the first annular electrode 102 and the second annular electrode 202, and between the first annular electrode 102 and the supplemental electrode 204 in the touch electrode unit TS, so as to weaken mutual interference between the first touch electrode 10 and the second touch electrode 20, reduce coupling capacitance between the first touch electrode 10 and the second touch electrode 20, reduce charging time of the first touch electrode 10 and the second touch electrode 20, and improve a report rate of the display panel.

Of course, in some alternative embodiments, the second dummy electrode 50 may be floating, or may be electrically connected to a fixed potential, and the invention is not limited in this respect.

In some alternative embodiments, referring to fig. 11-13, fig. 11 is a schematic view of another display panel provided by the embodiment of the present invention, fig. 12 is a partially enlarged view of a region Q3 in fig. 11, and fig. 13 is another partially enlarged view of the region Q3 in fig. 11. The display panel further comprises at least one light-transmitting region TL, which is located in the at least one first ring-shaped electrode 102 along a direction perpendicular to the plane of the substrate; and/or the light-transmissive region TL is located within the at least one second ring electrode 202.

It is understood that the display panel includes a display area AA and a non-display area BA, and the non-display area BA surrounds the display area AA. The display panel further includes at least one light-transmitting area TL, and the display area AA at least partially surrounds the light-transmitting area TL. The transparent region TL may be disposed corresponding to an optical collecting element (not shown), which may be a camera, a fingerprint sensor, or the like that operates by an optical signal. Taking the optical pickup element as a camera as an example, since the shape of the corresponding region of the camera is generally set to be circular, the light transmission region TL is exemplarily shown as a circular region in fig. 11, but the invention is not limited thereto, and the light transmission region TL may also be a polygon, an ellipse, or the like. The number of the transparent regions TL is not specifically limited in the present invention.

Note that the light-transmitting region TL may be provided with pixels so that the light-transmitting region TL can be used for display. The light-transmitting region TL may not be provided with pixels, so that the light-transmitting region TL does not display. The display panel may be provided with through holes in the light transmissive region TL, for example, by punching the display panel with a mechanical punch or by laser, and the display region AA of the display panel may be provided with openings for mounting optical pickup elements. Of course, the display panel may also be provided with a blind hole in the light-transmitting region TL, i.e. without an opening, but the region still corresponds to the optical collecting element.

In the embodiment of the present invention, the first touch electrode 10 and the second touch electrode 20 at the corresponding positions of the light-transmitting area TL are removed, so that more external light can enter the camera (taking an optical collecting element as an example for a camera) located at the backlight side of the display panel through the light-transmitting area TL, and the camera is ensured to receive sufficient light, so as to satisfy the camera shooting function of the camera. It can be understood that, in the same touch electrode unit TS, due to the arrangement of the transparent region TL, the second touch electrode 20 is divided into two portions located at two sides of the first touch electrode 10 along the second direction Y, and therefore, at least one connection structure 31 needs to be arranged to ensure the connection reliability of the second touch electrode 20. The present invention is illustrated only by providing two connecting structures 31.

In general, the side length of the touch electrode unit TS is between 3.8mm and 4.2mm, which is smaller than the size of the camera. In the present invention, the transparent region TL is disposed in one touch electrode unit TS and further disposed in at least one first ring electrode 102; and/or the transparent region TL is located in the at least one second annular electrode 202, the first annular electrode 102 and/or the second annular electrode 202 can be fully utilized to set the transparent region TL, so that the shape of the transparent region TL is matched with that of the annular electrode, and the touch effect or the display effect of the display panel is not affected.

In some alternative embodiments, referring to fig. 11 and 14, fig. 14 is a further enlarged view of a portion of region Q3 of fig. 11. The display panel further comprises at least one light-transmissive region TL in a direction perpendicular to the plane of the substrate, the light-transmissive region TL being located within the supplemental electrode 204.

Compared with fig. 12 and 13, in fig. 14, the first annular electrode 102 and the second annular electrode 202 in the middle of the touch electrode unit TS are removed, and in order to ensure the connection reliability of the first touch electrode 10, at least one connection structure 32 may be disposed between the light-transmitting region TL and the supplemental electrode 204, and the connection structure 32 may be disposed on the same layer as the connection structure 31, thereby simplifying the process and improving the production efficiency.

Specifically, to match the size of the optical collection element, the size of the light-transmissive region TL may be enlarged, as shown in fig. 14, so that the light-transmissive region TL is located within the supplemental electrode 204. That is, the light-transmitting region TL is disposed by using the inner edge of the supplemental electrode 204 as a ring shape, so that the shape of the light-transmitting region TL is matched therewith, and the touch effect or the display effect of the display panel is not affected.

It should be noted that, in the embodiments of the display panel provided by the present invention, the technical features can be freely combined without conflict, and the present invention is not exhaustive.

An embodiment of the present invention further provides a display device, as shown in fig. 15, fig. 15 is a schematic diagram of a display device provided in an embodiment of the present invention, and the display device includes the display panel. The specific structure of the display panel has been described in detail in the above embodiments, and is not described herein again. Of course, the display device shown in fig. 15 is only a schematic illustration, and the display device may be any electronic device with a display function, such as a mobile phone, a tablet computer, a notebook computer, an electronic book, or a television.

The display panel and the display device provided by the embodiment of the present invention are described in detail above, and the principle and the embodiment of the present invention are explained by applying specific examples herein, and the description of the above embodiments is only used to help understanding the method and the core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed, and in summary, the content of the present specification should not be construed as a limitation to the present invention.

Claims (13)

1. A display panel, comprising:

a substrate;

the touch electrode units are positioned on one side of the substrate and arranged in a matrix manner along a first direction and a second direction, each touch electrode unit comprises a first touch electrode and a second touch electrode which are insulated from each other, and the first direction and the second direction are crossed;

the first touch electrode comprises a first electrode trunk and at least one first annular electrode, the first electrode trunk extends along the first direction, and the first annular electrode is electrically connected with the first electrode trunk;

the second touch electrode comprises a second electrode trunk and at least one second annular electrode, the second electrode trunk extends along the second direction, and the second annular electrode is electrically connected with the second electrode trunk;

the first and second ring electrodes are alternately arranged along a third direction, which intersects both the first and second directions.

2. The display panel according to claim 1, wherein the touch electrode units are in a symmetrical structure along a symmetry axis parallel to the first direction; and/or the presence of a gas in the gas,

the touch electrode units are in a symmetrical structure along a symmetrical axis parallel to the second direction.

3. The display panel of claim 1, wherein the second touch electrode comprises a supplemental electrode;

the first annular electrode and the second annular electrode are positioned in the supplementary electrode along the direction vertical to the plane of the substrate.

4. The display panel of claim 3, wherein the first ring electrode adjacent to the supplemental electrode is a first outer ring electrode, the first outer ring electrode further comprising at least one corner electrode;

the corner electrode extends along a fourth direction and is positioned on one side, away from the second annular electrode, of the first outer annular electrode, and the fourth direction is crossed with the first direction and the second direction.

5. The display panel according to claim 4, wherein an acute angle included between the fourth direction and the first direction is equal to an acute angle included between the fourth direction and the second direction.

6. The display panel of claim 4, further comprising a first dummy electrode, the corner electrode at least partially surrounding the first dummy electrode.

7. The display panel according to claim 1, wherein the first touch electrode and the second touch electrode are comb-shaped or wavy at a boundary.

8. The display panel according to claim 1, further comprising a bridge-spanning connection portion, wherein the first touch electrode and the second touch electrode are on the same layer, and the same first ring electrode includes at least two first sub-ring electrodes located on two sides of the second electrode trunk, and two adjacent first sub-ring electrodes are electrically connected through the bridge-spanning connection portion.

9. The display panel according to claim 1, wherein the first touch electrode and the second touch electrode are both transparent electrodes or metal mesh electrodes.

10. The display panel according to claim 1, wherein a second dummy electrode is disposed between two adjacent touch electrode units along the first direction.

11. The display panel according to claim 1, wherein the display panel further comprises at least one light-transmissive region, the light-transmissive region being located within at least one of the first ring-shaped electrodes in a direction perpendicular to a plane of the substrate; and/or the presence of a gas in the gas,

the light-transmitting region is located in at least one of the second ring-shaped electrodes.

12. The display panel according to claim 3, wherein the display panel further comprises at least one light-transmissive region, the light-transmissive region being located in the supplemental electrode in a direction perpendicular to a plane of the substrate.

13. A display device characterized by comprising a display panel according to any one of claims 1 to 12.

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