CN114356151A - Display panel and display device - Google Patents

Abstract

The application relates to a display panel and a display device. The display panel includes: a substrate base plate; the touch layer is arranged on one side of the substrate and comprises touch electrodes and touch wires which are connected, and the touch electrodes are reused as common electrodes; the pixel circuit is arranged on one side, far away from the substrate base plate, of the touch layer and comprises a plurality of thin film transistors. The application provides a display panel can improve the rete problem of peeling off because the material mechanical properties difference leads to between organic rete and the conductive film layer.

Description

Display panel and display device

Technical Field

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

Background

With the development of display technologies, touch control is widely applied as a convenient and efficient human-computer interaction mode, and the market share occupied by touch display panels is gradually increased. However, in the existing touch liquid crystal display panel, the touch electrode and the common electrode for sensing touch input are generally disposed adjacent to the film layer made of insulating material, and at this time, due to the difference in mechanical properties between the electrode and the insulating layer, when the touch liquid crystal display panel is subjected to stress, the electrode and the insulating layer are easily peeled off and broken, which causes the problems of reduced display quality, touch failure, and the like.

Therefore, a new display panel and a corresponding display device capable of improving the peeling problem of the touch electrode are needed.

Disclosure of Invention

The application provides a display panel and a display device, and aims to solve the problems of film stripping and wiring short circuit in a touch display device.

In a first aspect, the present application provides a display panel comprising: a substrate base plate; the touch layer is arranged on one side of the substrate and comprises touch electrodes and touch wires which are connected, and the touch electrodes are reused as common electrodes; and the pixel circuit is arranged on one side of the touch layer, which is far away from the substrate base plate, and comprises a plurality of thin film transistors.

Compared with the prior art, the technical scheme provided by the embodiment of the application has at least the following advantages:

according to the display panel provided by the embodiment of the application, the touch layer is arranged between the substrate base plate and the pixel circuit, the touch electrode in the touch layer is close to the substrate base plate and can be supported by the substrate base plate, and the phenomenon that when the display panel is subjected to external stress or internal stress caused by temperature change, film stripping is caused between the touch electrode and an adjacent film due to the fact that mechanical parameters are not matched is avoided.

In a second aspect, the present application provides a display device, including the display panel.

Drawings

Features, advantages and technical effects of exemplary embodiments of the present application will be described below with reference to the accompanying drawings.

Fig. 1 is a schematic structural diagram of a display panel provided in an embodiment of the present application;

FIG. 2 is a cross-sectional view of the display panel A-A' of FIG. 1;

FIG. 3 is another cross-sectional view of the display panel A-A' of FIG. 1;

FIG. 4 is another cross-sectional view of the display panel A-A' of FIG. 1;

FIG. 5 is another cross-sectional view of the display panel A-A' of FIG. 1;

FIG. 6 is another cross-sectional view of the display panel A-A' of FIG. 1;

FIG. 7 is another cross-sectional view of the display panel A-A' of FIG. 1;

FIG. 8 is another cross-sectional view of the display panel A-A' of FIG. 1;

FIG. 9 is another cross-sectional view of the display panel A-A' of FIG. 1;

fig. 10 is a schematic structural diagram of a display device according to an embodiment of the present application.

In the drawings, like parts are provided with like reference numerals. The figures are not drawn to scale.

Detailed Description

Features and exemplary embodiments of various aspects of the present application will be described in detail below, and in order to make objects, technical solutions and advantages of the present application more apparent, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application. It will be apparent to one skilled in the art that the present application may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present application by illustrating examples thereof.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

It will be understood that when a layer, region or layer is referred to as being "on" or "over" another layer, region or layer in describing the structure of the component, it can be directly on the other layer, region or layer or intervening layers or regions may also be present. Also, if the component is turned over, one layer or region may be "under" or "beneath" another layer or region.

It should be understood that although the terms first and second may be used to describe the forms of the display panel in the embodiments of the present application, the forms should not be limited to these terms, and these terms are only used to distinguish the forms from each other. For example, the first form may also be referred to as the second form, and similarly, the second form may also be referred to as the first form, without departing from the scope of the embodiments of the present application.

Features and exemplary embodiments of various aspects of the present application will be described in detail below. Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

In a conventional touch liquid crystal display panel, a touch electrode, a passivation layer and a planarization layer are usually disposed adjacent to each other, and at the same time, ITO (Indium tin oxide) is often used as a material of the touch electrode in the conventional touch liquid crystal display panel, and the passivation layer is usually an organic/inorganic insulating layer, for example: the material of the planarization layer may include Polyimide (PI), acrylic resin, etc., and the mechanical parameters of the three are different, and the thicknesses are different, so that the deformation degrees of different film structures are different when the planarization layer is stressed. When the display panel is affected by temperature changes during the manufacturing process, for example, after a high temperature annealing process or when the display panel is subjected to external bending stress, the stresses generated in the electrode layer, the passivation layer and the planarization layer are mismatched, which easily causes peeling between the film layers, thereby affecting the reliability of the circuits therein.

Referring to fig. 1 to 3, fig. 1 is a schematic structural diagram of a display panel according to an embodiment of the present disclosure, fig. 2 is a cross-sectional view of a display panel a-a 'shown in fig. 1, and fig. 3 is another cross-sectional view of the display panel a-a' shown in fig. 1. The embodiment of the present application provides a display panel 100, which includes a substrate 10, a touch layer 20 and a pixel circuit 30, wherein the touch layer 20 is disposed between the substrate 10 and the pixel circuit 30, the touch layer 20 includes a touch electrode 21 and a touch trace 22 connected to each other, the touch electrode 21 is reused as a common electrode, and the pixel circuit 30 includes a plurality of thin film transistors 31.

The embodiment of the present application provides a display panel 100, in which a plurality of pixels are disposed, and the display of the pixels is controlled by circuit traces such as data signal lines, so as to form a corresponding image. Meanwhile, the display panel 100 has a touch function, and is capable of sensing touch input and making corresponding display feedback according to the processing of the chip on the touch input signal. On this basis, the following description of the present application takes the display panel 100 as a self-capacitance touch liquid crystal display panel as an example for illustration, but the present application is not limited thereto.

In the display panel 100 provided in the embodiment of the present application, the touch layer 20 is directly disposed on the substrate 10 and located between the substrate 10 and the pixel circuit 30, so that the touch electrode 21 in the touch layer 20 is disposed close to the substrate 10. Each touch electrode 21 is electrically connected to at least one touch trace 22, each touch electrode 21 is connected to the touch driving circuit and the touch chip through the touch trace 22, adjacent touch electrodes 21 are insulated from each other, and the touch electrodes 21 may be transparent conductive electrodes. For example, referring to fig. 2, the touch electrode 21 in the display panel 100 shown in fig. 2 is directly disposed on one side surface of the substrate 10, and correspondingly, the touch trace 22 electrically connected to the touch electrode 21 may be disposed above the touch electrode 21 and electrically connected to the touch electrode 21 through a via hole in the insulating layer. The combination degree between the ITO material commonly used for the touch electrode 21 and the glass material commonly used for the substrate base plate 10 is good, the touch electrode 21 is not easy to peel off from the substrate base plate 10, meanwhile, the substrate base plate 10 is high in rigidity and not easy to deform relatively, reliable support can be provided for the touch electrode, and deformation of the touch electrode 21 is avoided.

Further, referring to fig. 3, the touch electrode 21 may also be disposed on an insulating layer 80 disposed adjacent to the substrate 10, the insulating layer 80 may be made of silicon oxide or the like, and correspondingly, the touch trace 22 may be covered by the insulating layer 80 and electrically connected to the touch electrode 21 through a via hole in the insulating layer 80. At this time, although the touch electrode 21 is not in direct contact with the substrate 10, there is only one other film layer between the two, and the substrate 10 can still provide a certain degree of support for the touch electrode 21, so as to reduce the deformation degree of the touch electrode 21. The touch electrode 21 is covered by the gate insulating layer 312, and is not in direct contact with the passivation layer, the planarization layer 60, and other film layers, so that gaps and peeling between the touch electrode 21 and the adjacent film layers can be further avoided.

In the embodiment of the present application, each touch electrode 21 and the corresponding touch trace 22 are connected by a via hole in the insulating layer therebetween, and it can be understood that the number of the via holes is not limited to one, and a plurality of via holes may be further disposed to increase the contact area in order to reduce the contact resistance between the touch electrode 21 and the touch trace 22.

The touch electrode 21 in the display panel 100 provided in the embodiment of the present application is also reused as a common electrode. That is, during displaying, the common voltage Vcom is applied to at least a portion of the touch electrodes 21 for releasing an electric field capable of driving liquid crystal molecules to deflect in combination with another electrode serving as a capacitor plate. It is understood that the display panel 100 may adopt a driving method of alternately driving at different time periods, that is, the display period and the touch sensing period are alternately performed. In the display phase, the touch chip controlling the touch function of the display panel 100 applies a common voltage Vcom to the touch electrode 21, and the touch electrode 21 is used as a common electrode and is used as one polar plate of a capacitor forming an electric field; in the touch stage, a touch driving signal may be applied to each touch electrode 21 through the touch trace 22, and the touched position is obtained by detecting the self-capacitance change transmitted from each touch electrode 21 to the touch chip, so as to implement touch detection.

It can be understood that the alternation of the touch stage and the display stage may be that one frame is used as a period, and the duration of one frame is divided into one display stage and one touch stage; or, the duration of one frame may be divided into a plurality of display phases and a plurality of touch phases, and the self-capacitance signal change of a part of the touch electrodes is detected in each touch phase; alternatively, the touch driving and the display driving may be alternately implemented in a row interval/column interval manner, which is not particularly limited in the present application.

Multiplexing the touch electrode 21 as a common electrode can make the film layer structure of the display panel 100 simple, thereby simplifying the manufacturing process, improving the production efficiency, simultaneously leaving out the space for originally setting the common electrode and the corresponding connecting wiring, and increasing the aperture opening ratio of the pixel.

Referring to fig. 4 and 5 together, fig. 4 is another cross-sectional view of the display panel a-a 'shown in fig. 1, and fig. 5 is another cross-sectional view of the display panel a-a' shown in fig. 1. In some alternative embodiments, the thin film transistor 31 includes an active layer 311, a gate insulating layer 312, a gate electrode 313, and source and drain layers sequentially stacked in a direction perpendicular to the plane of the substrate 10, where the source and drain layers include a source electrode 314 and a drain electrode 315 disposed at an interval. The display panel 100 further includes a data line 40 and a pixel electrode 50, the data line 40 being electrically connected to one of the source electrode 314 and the drain electrode 315, the pixel electrode 50 being electrically connected to the other of the source electrode 314 and the drain electrode 315.

The pixel circuit layer 30 is provided with a plurality of thin film transistors 31, the thin film transistors 31 serve as switching elements to drive pixels connected to the thin film transistors 31 to display, one of the source electrodes 314 and the drain electrodes 315 of the thin film transistors 31 is connected to the data lines 40, the other is connected to the pixel electrodes 50, and when the thin film transistors 31 are turned on, data signals in the data lines 40 can be transmitted to the pixel electrodes 50. The display panel 100 in the present application is not particularly limited as to which of the source electrode 314 and the drain electrode 315 of the thin film transistor 31 is connected to the data line 40 and which is connected to the pixel electrode 50, as long as the source electrode and the drain electrode are electrically connected to each other.

In the display phase of the display panel 100, the pixel electrode 50 is applied with the data signal Vdata, the touch electrode 21 is applied with the common voltage signal Vcom, and an electric field with a corresponding size is formed therebetween to drive the adjacent liquid crystal molecules to deflect an angle corresponding to the size of the electric field, so as to realize normal display of different images. The data line 40 may be simultaneously connected with a plurality of thin film transistors 31, and the plurality of thin film transistors 31 may be respectively connected to a plurality of different pixel electrodes 50 one by one, that is, the same data line 40 may provide data signals for a plurality of pixels in the same row or the same column, and each pixel electrode 50 may also cover one or more pixels, which is not particularly limited in this application.

Referring to fig. 6 and 7 together, fig. 6 is another cross-sectional view of the display panel a-a 'shown in fig. 1, and fig. 7 is another cross-sectional view of the display panel a-a' shown in fig. 1. In some alternative embodiments, the data line 40 is disposed on the same layer as the source electrode 314 and the drain electrode 315, and an orthogonal projection of the touch trace 22 on the substrate 10 covers an orthogonal projection of the data line 40 on the substrate 10.

In the display panel 100 provided in the embodiment of the present application, the touch trace 22 is disposed in the touch layer 20, the data line 40 is disposed in the source/drain layer of the thin film transistor 31, the two are staggered and not adjacently disposed in different layers, on one hand, the data line 40 is conveniently electrically connected to the source 314 or the drain 315, on the other hand, the existing display panel pursues a higher aperture ratio and a narrower frame, the wiring space of the circuit trace is further compressed, which results in a too short distance between the adjacent circuit traces, at this time, when the metal film layer where the required trace is disposed is prepared, the metal particles easily form a dark line crossing the two traces between the adjacent traces, which causes conduction between the touch trace 22 and the data line 40, a short-circuit path is generated, and further causes problems of signal confusion, touch failure, and the like.

Therefore, in the display panel 100 provided in the embodiment of the present application, a film layer structure required for the operation of the thin film transistor 31, such as the gate insulating layer 312 and the interlayer dielectric layer, is arranged between the data line 40 of the source/drain layer and the surface of the touch layer 20 on the side close to the pixel circuit 30, so that the vertical distance between the data line 40 and the touch trace 22 in the touch layer 20 is relatively long, and a short circuit between the two circuit traces can be effectively avoided, thereby improving the reliability of the circuit and increasing the aperture ratio.

The touch layer 20 in the display panel 100 provided in the embodiment of the present application is disposed below the pixel circuit 30, wherein the touch electrode 21 may be disposed at a position overlapping with an orthogonal projection of a position where the touch electrode is connected to the data line 40 and the source/drain electrodes 314/315, that is, the touch trace 22 may be disposed directly below the data line 40, and meanwhile, the touch electrode 21 and a via hole where the touch electrode 21 is connected to the touch trace 22 are disposed below the data line 40 and the source/drain electrodes 314/315 connected thereto, so that the data line 40 and the touch trace 22 are overlapped in a top view, thereby reducing an area occupied by the pixel circuit and further increasing an aperture ratio of the pixel.

It can be understood that, referring to fig. 4 and fig. 5 again, the touch electrodes 21 and the touch traces 22 in the display panel 100 provided in the embodiment of the present application may also be disposed at positions that do not overlap with the orthographic projection of the thin film transistors 31 and the orthographic projection of the data lines 40, and in a top view of the display panel 100, the touch traces 22 and the data lines 40 extend in parallel and adjacently, so that parasitic capacitance generated between the signal lines can be avoided, and loss in the signal transmission process can be reduced.

In some alternative embodiments, the pixel electrode 50 is disposed on a side of the thin film transistor 31 away from the substrate 10, and an orthogonal projection of the touch electrode 21 on the substrate 10 at least partially coincides with an orthogonal projection of the pixel electrode 50 on the substrate 10.

In the display panel 100 provided in the embodiment of the present application, the touch electrode 21 is reused as a common electrode, and in the display stage, an electric field with controllable size is formed between the pixel electrode 50 and the touch electrode 21 for driving the liquid crystal molecules to deflect by a corresponding angle, so as to cooperate with the polarizer to complete the display of the picture. Therefore, the touch electrode 21 and the pixel electrode 50 need to have an area at least partially overlapped by orthographic projection to form a corresponding driving electric field. Each pixel electrode 50 and the touch electrode 21 may correspond to a plurality of pixels in one region, or correspond to one pixel individually, the size and shape of the orthographic projection overlapping region need to be designed according to the specific situation of the pixel, and the intensity of the electric field can deflect the liquid crystal molecules by the angle of the required size, which is not limited in this application.

In some optional embodiments, the display panel 100 further includes a planarization layer 60, the planarization layer 60 is disposed between the source and drain layers where the source electrode 314 and the drain electrode 315 are located and the pixel electrode 50, and the thickness of the planarization layer 60 is 0.3 micrometers to 1.0 micrometer.

In the display panel 100 provided in the embodiment of the present application, the touch layer 20 is disposed between the substrate 10 and the pixel circuit 30, the touch electrode 21 in the touch layer 20 is disposed close to the substrate 10, and a plurality of film layers including the planarization layer 60 exist between the touch electrode 21 and the pixel electrode 50 disposed above the pixel circuit 30, so that a larger distance also exists. In the process of using the display panel 100, especially in the display stage of the display panel 100, an induced capacitance is formed between the touch electrode 21 and the pixel electrode 50, and an electric field for driving the liquid crystal molecules to deflect is generated, so that a certain requirement exists on the capacitance value of the capacitance. In order to make the capacitance between the touch electrode 21 and the pixel electrode 50 within a desired range, the thickness of the planarization layer 60 needs to be reduced. Optionally, the thickness of the planarization layer 60 may be 0.3 to 1.0 μm, and the distance between the touch electrode 21 and the pixel electrode 50 can meet the above requirements on the capacitance value and the electric field magnitude formed between the two electrodes.

In some optional embodiments, the display panel 100 further includes a light shielding layer 70, the light shielding layer 70 is disposed on the same layer as the touch trace 22, the active layer 311 includes a channel region 3111, and an orthographic projection of the light shielding layer 70 on the substrate 10 covers an orthographic projection of the channel region 3111 on the substrate 10.

Referring to fig. 8, fig. 8 is another cross-sectional view of the display panel a-a' shown in fig. 1. In the display panel 100 provided in the embodiment of the present application, the touch trace 22 and the light shielding layer 70 are disposed on the same layer, so that the touch trace and the light shielding layer can be processed at one time by the same process, the processing process is simplified, and the production efficiency is improved. The touch traces 22 and the light shielding layer 70 can be made of metal materials, such as: silver, aluminium, copper, molybdenum and aluminum alloy etc. do not do specific restriction to this application, can select by oneself according to actual need.

In the display panel 100, the thin film transistor 31 is applied to a switching circuit to control the pixel unit to perform corresponding display, and after the active layer 311 of the thin film transistor 31 is illuminated, photo-generated carriers may be generated, which may increase the leakage current of the thin film transistor 31, thereby affecting the display quality of the display panel 100. By providing the light-shielding layer 70, light incident into the channel region 3111 can be blocked, and the active layer 311 of the thin film transistor 31 is prevented from being affected by external light, so that leakage current of the thin film transistor 31 due to photo-generated carriers generated by light irradiating the active layer is reduced.

Further, the touch traces 22 and the light shielding layer 70 are disposed on the same layer, and at this time, the touch traces 22 can be reused as the light shielding layer 70, that is, at least part of the touch traces 22 are disposed below the channel region 3111 to realize the same function as the light shielding layer 70, and the light shielding layer 70 is additionally disposed below the part of the channel region 3111 that is not shielded by the touch traces 22, so as to finally form a complete and comprehensive light shielding function.

In some optional embodiments, the thickness of the touch electrode 21 is greater than or equal to 100 nm.

In the display panel 100 provided in the embodiment of the present invention, the touch layer 20 where the touch electrode 21 is located is disposed on one side surface of the substrate 10, where the touch electrode 21 may be disposed adjacent to the substrate 10, or the touch electrode 21 may be disposed on the other side surface of the insulating layer 80 disposed adjacent to the substrate 10, so that the touch electrode 21 in the display panel 100 provided in the embodiment of the present invention is disposed close to the substrate 10 and is further distant from the pixel electrode 50 that needs to jointly form the driving electric field, and therefore, on the basis of the foregoing adjustment of the planarization layer 60, the thickness of the touch electrode 21 may be further increased appropriately, so as to maintain the required sensing sensitivity when the touch electrode 21 is used as a touch sensing, and have the required electrode sensing amount when the touch electrode is used as a common electrode. On this basis, the thickness of the touch electrode 21 may be greater than or equal to 100 nanometers, and at this time, the two sensing functions can be better realized on the premise of having the structure in the display panel 100 provided in the embodiment of the present application. And the thickness of the touch electrode 21 is properly increased, so that the bending degree of the touch electrode affected by stress can be further reduced, and the problem of film layer stripping is solved.

In some optional embodiments, the display panel 100 further includes a first insulating layer 81 and a second insulating layer 82, the first insulating layer 81 is disposed between the touch electrode 21 and the touch trace 22, the touch electrode 21 and the touch trace 22 are electrically connected through a via hole formed in the first insulating layer 21, and the second insulating layer 82 is disposed between the touch layer 20 and the pixel circuit 30.

It can be understood that, in the display panel, when the touch electrode and the touch trace are disposed on different layers, an insulating layer is usually disposed between the touch electrode and the touch trace. Referring to fig. 2 again, the display panel provided in the embodiment of the present application may be respectively provided with a first insulating layer 81 and a second insulating layer 82, wherein the first insulating layer 81 is used to insulate at least a portion of the touch electrodes 21 and the touch traces 22 disposed on different layers from each other, and at a position where electrical connection is required, the two layers are connected and disposed through a through hole in the first insulating layer 81, so as to ensure normal operation of the touch function and the display function. The second insulating layer 82 is used for insulating the touch layer 20 from the pixel circuit 30, so as to prevent the touch signal from interfering with the switching circuit where the thin film transistor 31 is located. The first insulating layer 81 may be a passivation layer, and the second insulating layer 82 may be made of silicon oxide or the like.

Further, please refer to fig. 3 again. In the embodiment of the present invention, the insulating layer 80 may be disposed between the touch electrode 21 and the touch trace 22, and the touch electrode 21 may be disposed on the same layer as the active layer 311 and covered by the gate insulating layer 312, that is, the touch electrode 21 is partially disposed in the layer where the pixel circuit 30 is located, the touch trace 22 is disposed adjacent to the substrate 10, and the touch trace 22 and the touch electrode 21 are electrically connected through the via hole disposed between the insulating layers 80, so as to implement a touch function. At this time, the orthographic projection of the touch trace 22 on the substrate 10 and the orthographic projection of the data line 40 on the substrate 10 do not overlap, so that the parasitic capacitance between the traces can be reduced, the load of the touch trace 22 and the data line 40 can be reduced, and the loss in the signal transmission process can be reduced. The touch layer 20 of the display panel 100 shown in fig. 2 is only provided with the insulating layer 80, and the touch electrode 21 and the active layer 311 are provided in the same layer, so that one process for manufacturing the insulating layer can be reduced, that is, the use of a mask can be reduced, thereby effectively simplifying the process of the display panel 100 and reducing the production cost.

It is understood that, in order to increase the aperture ratio, as shown in fig. 7, when the touch electrode 21 is located above the touch trace 22 in the display panel 100, the orthographic projection of the touch electrode 21 on the substrate 10 may also cover the orthographic projection of the connection portion of the data line 40 and the source electrode 314 or the drain electrode 315, similar to the foregoing embodiment, and the orthographic projection of the data line 40 overlaps the orthographic projection of the touch trace 22, and at this time, an additional insulating structure needs to be added above the touch electrode 21, so that the touch electrode 21 and the active layer 311 are arranged in staggered layers to avoid forming interference therebetween.

Referring to fig. 9, fig. 9 is another cross-sectional view of the display panel a-a' shown in fig. 1. In some optional embodiments, the display panel further includes a liquid crystal layer 90, and the liquid crystal layer 90 is disposed on a side of the pixel circuit 30 facing away from the touch layer 20.

The display panel 100 provided in the embodiment of the present application may be a touch liquid crystal display panel, in which the liquid crystal layer 90 is disposed, and in a display stage of the panel, liquid crystal molecules therein may be driven to deflect and adjust light flux through cooperation of the pixel electrode 50 and the touch electrode 21, and in addition, components such as a polarizer and a color film substrate are added, so that normal display of an image may be achieved. The multiplexing of the touch electrodes 21 can also realize the touch control function simultaneously in a segmented alternate driving mode, and the touch electrodes are combined to form a complete liquid crystal touch display panel.

On the other hand, please refer to fig. 10, fig. 10 is a schematic structural diagram of a display device according to an embodiment of the present application. The present application further provides an embodiment of a display device 1000, which includes the display panel in any of the above embodiments, and the display device 1000 may be any product or component with a display function, such as a mobile phone, a tablet computer, a digital photo frame, and electronic paper.

The display device 1000 provided in the embodiment of the present application has all the advantages of the display panel 100 provided in the embodiment of the present application, and specific reference may be specifically made to the specific description of the display panel in the foregoing embodiments, which is not repeated herein.

It is to be understood that both the foregoing description and the following detailed description are exemplary and explanatory only and are not restrictive of the application, as various changes and modifications may be effected therein by those skilled in the art without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.

Claims (10)

1. A display panel, comprising:

a substrate base plate;

the touch layer is arranged on one side of the substrate and comprises touch electrodes and touch wires which are connected, and the touch electrodes are reused as common electrodes;

the pixel circuit is arranged on one side, far away from the substrate base plate, of the touch layer and comprises a plurality of thin film transistors.

2. The display panel according to claim 1, wherein the thin film transistor comprises an active layer, a gate insulating layer, a gate electrode, and a source drain layer, which are sequentially stacked in a direction perpendicular to a plane of the substrate base plate, wherein the source drain layer comprises a source electrode and a drain electrode which are arranged at intervals;

the display panel further includes a data line electrically connected to one of the source electrode and the drain electrode, and a pixel electrode electrically connected to the other of the source electrode and the drain electrode.

3. The display panel according to claim 2, wherein the data lines are disposed on the same layer as the source and the drain, and an orthogonal projection of the touch traces on the substrate covers an orthogonal projection of the data lines on the substrate.

4. The display panel according to claim 2, wherein the pixel electrode is disposed on a side of the thin film transistor away from the substrate, and an orthogonal projection of the touch electrode on the substrate at least partially coincides with an orthogonal projection of the pixel electrode on the substrate.

5. The display panel according to claim 4, further comprising a planarization layer disposed between the source and drain layers and the pixel electrode, wherein the planarization layer has a thickness of 0.3 to 1.0 μm.

6. The display panel of claim 2, wherein the display panel further comprises a light-shielding layer disposed on the same layer as the touch traces, the active layer comprises a channel region, and an orthographic projection of the light-shielding layer on the substrate covers an orthographic projection of the channel region on the substrate.

7. The display panel of claim 1, wherein the touch electrode has a thickness greater than or equal to 100 nm.

8. The display panel of claim 1, wherein the display panel further comprises a first insulating layer and a second insulating layer, the first insulating layer is disposed between the touch electrode and the touch trace, the touch electrode and the touch trace are electrically connected through a via hole formed in the first insulating layer, and the second insulating layer is disposed between the touch layer and the pixel circuit.

9. The display panel according to claim 1, further comprising a liquid crystal layer disposed on a side of the pixel circuit facing away from the touch layer.

10. A display device comprising the display panel according to any one of claims 1 to 9.

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