CN111367437B

CN111367437B - Display panel, detection and maintenance method thereof and display device

Info

Publication number: CN111367437B
Application number: CN202010358945.6A
Authority: CN
Inventors: 于泉鹏
Original assignee: Shanghai Tianma Microelectronics Co Ltd
Current assignee: Shanghai Tianma Microelectronics Co Ltd
Priority date: 2020-04-29
Filing date: 2020-04-29
Publication date: 2023-07-04
Anticipated expiration: 2040-04-29
Also published as: CN111367437A

Abstract

The invention discloses a display panel, a detection and maintenance method thereof and a display device, and relates to the technical field of display. The display panel comprises a display area, wherein the display area comprises a plurality of sub-pixel areas which are arranged in an array manner, any sub-pixel area comprises a light-emitting element and conductive pad groups corresponding to the light-emitting element, and each conductive pad group comprises a main conductive pad unit and a standby conductive pad unit; the display panel further comprises an array layer, at least part of the light emitting elements are electrically connected with the array layer through the main conductive pad unit; at least part of the standby conductive pad units are multiplexed into a part of the touch electrode; the part of the standby conductive pad unit which is not used for electrically connecting the light-emitting element is multiplexed to serve as a part of the touch electrode, so that the touch function of the display panel can be realized, the number of film layers of the display panel and the complexity of the display panel are not increased, the manufacturing efficiency of the display panel is improved, and the normal display and touch functions of the display panel are ensured.

Description

Display panel, detection and maintenance method thereof and display device

Technical Field

The invention relates to the technical field of display, in particular to a display panel, a detection and maintenance method thereof and a display device.

Background

In the prior art, in order to meet the touch mode of Micro LEDs In a display device, for example, a resistive touch screen is selectively arranged on one side of a film layer provided with LEDs facing a light-emitting surface of the display device, or a double-layer metal touch layer is arranged In an insulating layer on one side of the film layer provided with LEDs facing the light-emitting surface of the display device, so as to form a touch structure of In-cell mutual capacitance, wherein the insulating layer is used for insulating the adjacent LEDs; that is, when the touch function of the display panel is realized in the prior art, even if the touch film layer is integrated into the display panel, the number of the film layers corresponding to the display panel is relatively large and complex, for example, when double-layer metal is used as the touch layer, at least two organic insulation filling layers are needed; therefore, it is needed to provide a display panel capable of integrating touch functions without increasing the number of layers of the panel and simplifying the complexity of the layers.

Disclosure of Invention

In view of the above, the present invention provides a display panel and a display device for improving the problems of excessive number of film layers and excessive rubbing complexity of the display panel integrated with the touch function.

In a first aspect, the present application provides a display panel, where the display panel includes a display area, where the display area includes a plurality of sub-pixel areas arranged in an array, any one of the sub-pixel areas includes a light emitting element and a conductive pad group corresponding to the light emitting element, and each of the conductive pad groups includes a main conductive pad unit and a standby conductive pad unit;

The display panel further comprises an array layer, at least part of the light emitting elements are electrically connected with the array layer through the main conductive pad unit; at least part of the standby conductive pad units are multiplexed into a part of the touch electrode.

In a second aspect, the present application provides a method for detecting and maintaining a display panel, for the display panel, where the main conductive pad unit includes a first pad and a second pad, and the standby conductive pad unit includes a third pad and a fourth pad;

the method comprises the following steps:

the light emitting elements are electrically connected with the main conductive pad unit, the second pad is connected to a first voltage signal end, the fourth pad is disconnected from the first voltage signal end, and the light emitting conditions of the light emitting elements in the display panel are detected through a detection machine;

if at least one light emitting element does not emit light, connecting the fourth pad of the sub-pixel area corresponding to the light emitting element which does not emit light to the first voltage signal terminal, disconnecting the second pad from the first voltage signal terminal, and electrically connecting the light emitting element with the standby conductive pad unit; the standby conductive pad units in the sub-pixel area corresponding to the light-emitting element with normal light emission are multiplexed into a part of the touch electrode; and one part of the touch electrode is a touch electrode sub-part, and at least one part of the touch electrode sub-parts are electrically connected with each other to form the touch electrode.

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

Compared with the prior art, the display panel, the detection and maintenance method thereof and the display device provided by the invention have the advantages that at least the following beneficial effects are realized:

the application is realized by arranging a plurality of main conductive pad units and standby conductive pad units on one side surface of the display panel array layer, wherein the main conductive pad units and the standby conductive pad units are used for electrically connecting the light-emitting elements, part of the standby conductive pad units can be used as an intermediate part for electrically connecting the array layer and the light-emitting element, and part of the standby conductive pad units can also be multiplexed into a part of the touch electrode; the part of the standby conductive pad unit which is not used for electrically connecting the light-emitting element is multiplexed to serve as a part of the touch electrode, so that the touch function of the display panel can be realized, the number of film layers of the display panel and the complexity of the display panel are not increased, the manufacturing efficiency of the display panel is improved, and the normal display and touch functions of the display panel are ensured.

Of course, it is not necessary for any one product embodying the invention to achieve all of the technical effects described above at the same time.

Other features of the present invention and its advantages will become apparent from the following detailed description of exemplary embodiments of the invention, which proceeds with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.

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

FIG. 2 is a cross-sectional view of one AA' of FIG. 1 of the present application;

FIG. 3 is another schematic view of region B of FIG. 2 of the present application;

FIG. 4 is another schematic diagram of a display panel according to an embodiment of the disclosure;

FIG. 5 is a schematic diagram of a display panel according to an embodiment of the present disclosure;

FIG. 6 is a schematic diagram of a gate driving circuit according to an embodiment of the present disclosure;

FIG. 7 is another schematic diagram of a gate driving circuit according to an embodiment of the present disclosure;

FIG. 8 is a schematic diagram illustrating an arrangement of a conductive pad group according to an embodiment of the present disclosure;

FIG. 9 is a schematic diagram of a conductive pad set in a touch sensing area according to an embodiment of the present disclosure;

FIG. 10 is a schematic diagram of a conductive pad set in a touch sensing area according to an embodiment of the present disclosure;

FIG. 11 is a flowchart of a method for detecting and maintaining a display panel according to an embodiment of the present disclosure;

fig. 12 is a schematic diagram of a display device according to an embodiment of the present application.

Detailed Description

Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless it is specifically stated otherwise.

The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses.

Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate.

In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of exemplary embodiments may have different values.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.

In the prior art, when the touch function of the display panel is realized, even though the touch film layer is integrated into the display panel, the number of the film layers corresponding to the display panel is relatively large and complex, for example, when double-layer metal is used as the touch layer, at least two organic insulation filling layers are needed; therefore, it is needed to provide a display panel capable of integrating touch functions without increasing the number of layers of the panel and simplifying the complexity of the layers.

In view of the above, the present invention provides a display panel and a display device for improving the problems of excessive number of layers and complexity of layers of the display panel integrated with the touch function.

Fig. 1 is a schematic view of a display panel provided in an embodiment of the present application, fig. 2 is a cross-sectional view AA' of fig. 1 of the present application, fig. 3 is another schematic view of a region B of fig. 2 of the present application, and referring to fig. 1 to 3, the present application provides a display panel 100, where the display panel 100 includes a display area 1, the display area 1 includes a plurality of sub-pixel areas 3 arranged in an array, any sub-pixel area 3 includes a light emitting element 9 and conductive pad groups corresponding to the light emitting element 9, and each conductive pad group includes a main conductive pad unit 4 and a standby conductive pad unit 5;

the display panel 100 further includes an array layer 6, at least a portion of the light emitting elements 9 being electrically connected to the array layer 6 through the main conductive pad unit 4; at least part of the spare conductive pad unit 5 is multiplexed as a part of the touch electrode.

Referring to fig. 1 and fig. 2, specifically, the present application provides a display panel 100, where the display panel 100 includes a display area 1, the display area 1 includes a plurality of sub-pixel areas 3 arranged in an array, each of the sub-pixel areas 3 is provided with a light emitting element 9 and a conductive pad group corresponding to the light emitting element 9, the light emitting element 9 is disposed on a side of the conductive pad group facing a light emitting surface of the display panel 100, and one of the conductive pad groups at least corresponds to one of the light emitting elements 9. Any one of the conductive pad groups includes one main conductive pad unit 4 and one spare conductive pad unit 5.

Fig. 3 shows another schematic view of the region B in fig. 2, on the substrate 7, a driving transistor is provided, which includes an active layer AL provided on a side of the substrate 7, a gate electrode G provided on a side of the active layer AL remote from the substrate 7, and a source S and a drain D provided on a side of the gate electrode G remote from the substrate 7, wherein the source S and the drain D are in contact with the active layer AL through vias, a main conductive pad unit 4 (first pad 41 and second pad 42) and a spare conductive pad unit 5 are provided on a side of the driving transistor remote from the substrate 7, and the drain D of the driving transistor is electrically connected to one pad of each group of conductive pad units through vias. The driving transistor is disposed in the array layer 6, and the drain D of the driving transistor is electrically connected to one pad of each group of conductive pad units through a via hole, that is, in order to electrically connect the pad and the driving transistor through the via hole, so that the array layer 6 is electrically connected to the light emitting element 9 through the conductive pad group, and a driving signal is transmitted to the light emitting element 9 through the array layer 6. It should be noted that one driving transistor corresponds to one main conductive pad unit 4 or one standby conductive pad unit 5, and only one pad of each conductive pad unit is electrically connected to the driving transistor.

Optionally, a space is provided between the main conductive pad unit 4 and the spare conductive pad unit 5, so that the main conductive pad unit 4 and the spare conductive pad unit 5 are disposed to be insulated from each other. The main conductive pad unit 4 and the standby conductive pad unit 5 may be conductive paste or other suitable conductive materials, such as at least one of indium (In), bismuth (Bi), tin (Sn), silver (Ag), gold (Au), copper (Cu), gallium (Ga) and antimony (Sb), but not limited thereto.

Alternatively, the light emitting element 9 is a light emitting diode element formed on a conductive pad group, and includes a light emitting body 94 and first and

second electrodes

92 and 93 electrically connected to the light emitting body 94; the first pole 92 and the second pole 93 are for electrical connection with the main conductive pad unit 4 or for electrical connection with the spare conductive pad unit 5.

The display panel 100 includes a substrate 7, and an array layer 6 disposed on one side of the substrate 7, at least a portion of the light emitting elements 9 are electrically connected to the array layer 6 through the main conductive pad unit 4, and when the light emitting elements 9 electrically connected to the main conductive pad unit 4 cannot emit light after being energized, a light emitting element 9 is rearranged on the spare conductive pad unit 5 corresponding to the light emitting element 91 (9) that cannot emit light. In the prior art, only one conductive pad unit is arranged at the position corresponding to the sub-pixel area where a light emitting element is located, when the light emitting element is installed and is detected to be unable to emit light normally, the corresponding light emitting element needs to be replaced for detection again, and if a plurality of light emitting elements are used for replacement and are unable to emit light normally after detection, the display panel is abandoned, which is not beneficial to ensuring the production yield of the display panel and increasing the manufacturing cost of the display panel. According to the method, the standby conductive pad unit 5 is arranged at each position where the light emitting element 9 is required to be arranged besides the main conductive pad unit 4, when the light emitting element 9 is arranged on the main conductive pad unit 4 and cannot emit light normally, the use of the main conductive pad unit 4 and the light emitting element 91 arranged on the main conductive pad unit can be abandoned, a new light emitting element 9 is arranged on the standby conductive pad unit 5 instead, the testing process of the original light emitting element 91 and the main conductive pad unit 4 with problems is omitted, the waste of materials in the manufacturing process of the display panel 100 can be avoided, the cost of the display panel 100 is reduced, and the manufacturing yield of the display panel 100 is improved.

When the light emitting element 9 is disposed above the main conductive pad unit 4 and can emit light normally, the corresponding standby conductive pad unit 5 can be reused as a part of the touch electrode, that is, the scheme provided by the application is that the unused standby conductive pad unit 5 is directly reused to form the touch electrode, and the film structure of the display panel 100 is not required to be additionally increased for setting the touch electrode, so that the manufacturing process of the whole display panel 100 is simplified, the design requirement of the display panel 100 for thinning is also facilitated, and the consumable material required for manufacturing the display panel 100 is reduced, that is, the production efficiency of the display panel 100 is improved and the production cost of the display panel 100 is reduced.

In addition, since the conductive pad groups are arranged in the display area 1 of the display panel 100 in an array manner, the pads included in each conductive pad unit 4/5 in the display area 1 are also uniformly arranged, and the pads in a part of the standby conductive pad units 5 uniformly arranged in the display area 1 are multiplexed into a part of the touch electrodes, so that the touch electrodes formed by the uniformly arranged pads (a part of the touch electrodes) can provide a uniform touch detection function for the display panel 100, which is beneficial to improving the touch sensing effect of the display panel 100. Next, referring to fig. 2 and 3, the layer-level position of the standby conductive pad unit 5 is located on one side of the array layer 6 facing the light emitting surface (i.e. the touch surface) of the display panel 100, in other words, the layer where the pad is located on the outer side of the driving circuit (driving transistor) in the array layer 6, and since a planarization layer or passivation layer is further included between the driving transistor and the pad, crosstalk between the voltage signal generated by the driving transistor and the voltage signal transmitted to the light emitting element 9 by the pad is avoided, so that the touch effect and the display effect are guaranteed.

With continued reference to fig. 1 and 2, optionally, at least a portion of the light emitting elements 9 are electrically connected to the array layer 6 by the spare conductive pad unit 5.

Specifically, when the light emitting element 9 electrically connected to the main conductive pad unit 4 cannot normally emit light after being turned on, the corresponding main conductive pad unit 4 and light emitting element 91 can be directly abandoned, and a new light emitting element 9 is arranged on the spare conductive pad unit 5 corresponding to the light emitting element 91 incapable of normally emitting light; in this way, the testing process of the original light emitting element 91 and the main conductive pad unit 4, which have problems, is omitted, the waste of materials in the manufacturing process of the display panel 100 can be avoided, the cost of the display panel 100 is reduced, and the manufacturing yield of the display panel 100 is improved.

The light emitting element 9 disposed at one side of the spare conductive pad unit 5 is electrically connected with the array layer 6 through the spare conductive pad unit 5, and an electrical signal is transmitted to the light emitting element 9 through the spare conductive pad unit 5 through the array layer 6 to control the on and off of the light emitting element 9.

It should be noted that, since the light emitting element 91 that cannot normally emit light and the main conductive pad unit 4 corresponding thereto do not adversely affect the normal operation of the display panel 100, the present application does not perform the removal process on the light emitting element 91 that cannot normally emit light after being electrified, so that the manufacturing process of the display panel 100 can be simplified, and the production efficiency of the display panel 100 can be improved.

It should be further noted that, the display panel 100 of the present application further includes an insulating layer 8, and the main conductive pad unit 4 and the standby conductive pad unit 5 are disposed in the insulating layer 8, so as to ensure mutual insulation between the main conductive pad unit 4 and the standby conductive pad unit 5, and also ensure mutual insulation between the pads forming the main conductive pad unit 4 or the standby conductive pad unit 5.

With continued reference to fig. 1, optionally, the display panel 100 further includes a non-display area 2, the non-display area 2 surrounds the display area 1, and the non-display area 2 is provided with a touch chip 11; the display panel 100 further includes a plurality of first leads 10, and the touch chip 11 is electrically connected to the spare conductive pad unit 5 through the first leads 10.

Specifically, the display panel 100 further includes a non-display area 2 surrounding the display area 1, and the non-display area 2 is provided with a touch chip 11; the display panel 100 further includes a plurality of first leads 10, and the touch chip 11 is electrically connected to the standby conductive pad unit 5 through the first leads 10; the backup conductive pad unit 5 is used as a part of the touch electrode, and the touch chip 11 transmits an electrical signal to the backup conductive pad unit 5 through the first lead 10, that is, transmits an electrical signal to the touch electrode through the first lead 10, thereby realizing the touch function of the display panel 100.

Fig. 4 is another schematic diagram of the display panel provided in the embodiment of the present application, referring to fig. 1 to 4, optionally, when the light emitting element 9 in any one of the sub-pixel regions 3 is electrically connected to the main conductive pad unit 4, the corresponding standby conductive pad unit 5 is multiplexed to be a portion of the touch electrode, a portion of the touch electrode is the touch electrode sub-portion 121, and at least a portion of the touch electrode sub-portions 121 are electrically connected to each other to form the touch electrode 12.

With continued reference to fig. 1-4, it should be noted that in fig. 4 provided by the present application, any main conductive pad unit 4 includes two conductive pads, and any standby conductive pad unit 5 also includes two conductive pads, and when the standby conductive pad unit 5 that is not electrically connected to the light emitting element 9 is multiplexed as a part of the touch electrode, only one pad in the standby conductive pad unit 5 is utilized as a part of the touch electrode. Specifically, in any one of the sub-pixel regions 3 in the present application, only one group of main conductive pad units 4 and standby conductive pad units 5 may be disposed, when the light emitting element 9 in one sub-pixel region 3 is disposed on a side of the main conductive pad unit 4 far away from the array layer 6, and the light emitting element 9 can emit light normally after being electrically connected to the main conductive pad unit 4, the corresponding standby conductive pad unit 5 is not used and is in an idle state. The present application uses one pad in the standby conductive pad unit 5 in the idle state as a part of the touch electrode (touch electrode sub-portion 121), where a part of the touch electrode 12 may be referred to as a touch electrode sub-portion 121, and at least part of the touch electrode sub-portions 121 adjacently disposed in the display panel 100 are electrically connected to each other to form the touch electrode 12, as shown in fig. 4.

In addition, the present application uses one pad, i.e., the fourth pad 54, of the spare conductive pad unit 5 that is not electrically connected to the light emitting element 9 as the touch electrode sub-portion 121, and further forms a touch electrode by electrically connecting at least some of the fourth pads 54 that are adjacently disposed to each other. Optionally, the fourth pad 54 multiplexed as a part of the touch electrode is a pad not connected to the driving transistor in the spare conductive pad unit 5.

The display panel 100 further includes a plurality of second leads 112, and the plurality of touch electrode sub-portions 121 disposed adjacently are electrically connected by the second leads 112 to form one touch electrode 12. The scheme provided by the application directly multiplexes the unused standby conductive pad units 5 and electrically connects through the second lead 112 to form the touch electrode 12, and the film layer structure of the display panel 100 is not required to be additionally added for the arrangement of the touch electrode 12, which is beneficial to simplifying the manufacturing process of the whole display panel 100, is beneficial to the thin design requirement of the display panel 100, and simultaneously reduces the consumable materials required for manufacturing the display panel 100, namely, is beneficial to improving the production efficiency of the display panel 100 and can effectively reduce the production cost of the display panel 100.

It should be noted that, the number of the touch electrode sub-portions 121 (pads of the spare conductive pad unit 5) included in one touch electrode 12 is not limited, and the shape of one touch electrode 12 is not limited, and the number of the touch electrode sub-portions 121 or the shape of the touch electrode 12 included in one touch electrode 12 may be adjusted by a user according to the user's own needs as long as the touch effect of the touch electrode 12 is not affected.

It should be further noted that, for example, as shown in fig. 1 and fig. 4, the display area 1 of the display panel 100 includes a plurality of sub-pixel areas 3 arranged in an array, and does not represent the actual size of the sub-pixel areas 3; in addition, the schematic formation manner of the touch electrode 12 provided in the present application is not representative of the number of the touch electrode sub-portions 121 included in one touch electrode 12 in actual production, and one touch electrode 12 includes 3 touch electrode sub-portions 121, or one touch electrode 12 includes 9 touch electrode sub-portions 121, or one touch electrode 12 includes 8 touch electrode sub-portions 121, etc. in fig. 4.

Fig. 5 is a schematic diagram of a display panel according to an embodiment of the present application, referring to fig. 1, 4 and 5, optionally, the display panel 100 further includes a plurality of touch sensing areas 13 disposed adjacently, and any one of the touch sensing areas 13 includes a touch electrode 12;

The display area 1 comprises a first display area 14 and a second display area 15, and the first display area 14 is positioned at one side of the second display area 15 far away from the touch chip 11 along the direction that the touch chip 11 points to the display area 1; the number of the first leads 10 electrically connected to any one of the touch electrodes 12 in the first display area 14 is greater than the number of the first leads 10 electrically connected to any one of the touch electrodes 12 in the second display area 15; wherein, the different first leads 10 are electrically connected with the different touch electrode sub-portions 121 respectively.

With continued reference to fig. 1, fig. 4, and fig. 5, specifically, the display panel 100 further includes a plurality of touch sensing areas 13 disposed adjacently, and any one of the touch sensing areas 13 includes a touch electrode 12; optionally, the number of the sub-pixel regions 3 included in each touch sensing area 13 is equal, so that when each touch sensing area 13 forms the touch electrodes 12, the areas of the sub-pixel regions 3 corresponding to the touch electrodes 12 are the same, which is beneficial to reducing the impedance difference between the touch electrodes 12, so that the touch electrodes 12 are distributed in the display area 1 as uniformly as possible, and the touch effect of the display panel 100 is beneficial to being improved. The display area 1 of the display panel 100 may include a first display area 14 and a second display area 15, wherein the first display area 14 is located at a side of the second display area 15 away from the touch chip 11 in a direction in which the touch chip 11 points to the display area 1, that is, the second display area 15 is closer to the touch chip 11 than the first display area 14.

Alternatively, the number of the first leads 10 electrically connected to any one of the touch electrodes 12 in the first display area 14 is greater than the number of the first leads 10 electrically connected to any one of the touch electrodes 12 in the second display area 15. For example, as shown in fig. 5, one touch electrode 12 in the first display area 14 may be electrically connected to the touch chip 11 through 6 or 7 first leads 10, and one touch electrode 12 in the second display area 15 may be electrically connected to the touch chip 11 through 4 first leads 10; and each of the first leads 10 electrically connected to the touch electrode 12 may be electrically connected to one touch electrode sub-portion 121, respectively. It should be noted that the number of the first leads 10 used when one touch electrode 12 is electrically connected to the touch chip 11 is not limited in the present application, and the number of the first leads 10 led out by the touch electrode 12 in the first display area 14 may be adjusted to be larger than the number of the first leads 10 led out by the touch electrode 12 in the second display area 15. The purpose of this arrangement is as follows.

Because the lengths of the first leads 10 corresponding to the touch electrodes 12 far away from the end of the touch chip 11 and the touch electrodes 12 close to the end of the touch chip 11 are different, the load of the first leads 10 is different, and in order to balance the load conditions of the touch electrodes 12 in each area of the display panel 100, the number of the first leads 10 for electrically connecting the touch electrodes 12 with the touch chip 11 is more in the first display area 14 on one side far away from the touch chip 11, which is favorable for balancing the load of each touch electrode 12 through the first leads 10 with more numbers. In addition, the first lead 10 in the present application is directly electrically connected to each touch electrode sub-portion 121, which is favorable for avoiding the speed of receiving the signal transmitted by the touch chip 11 by each touch electrode sub-portion 121 with different positions.

In addition, in the display panel 100 with the sub-pixel regions 3 uniformly arranged, the shape and size of each touch sensing region 13 may be selected to be the same, for example, a rectangular region with a size of 4mm x 4mm is provided for each touch sensing region 13, but not limited thereto. It should be noted that, assuming that the area of each sub-pixel region 3 included in one display panel 100 is 100 μm by 100 μm, the size of each touch sensing area 13 may be set to be, for example, 5mm (±2mm) ×5mm (±2mm), and the number of the touch electrode sub-portions 121 included in the area of 5mm (±2mm) ×5mm (±2mm) may be, for example, 4-6, but not limited thereto.

Referring to fig. 4, the touch electrode 12 is optionally a self-capacitive touch electrode.

Specifically, the touch electrode 12 formed by electrically connecting the plurality of touch electrode sub-portions 121 adjacently arranged through the second lead 112 is a self-capacitance touch electrode, and the self-capacitance is formed by the touch electrode 12 and a human body (finger), so that the position of a touch point can be accurately reported when a user touches the display screen, and the self-capacitance touch electrode has the advantages of less scanning times and low power consumption, and is beneficial to reducing the power consumption of the touch function of the display panel 100.

Fig. 6 is a schematic diagram of a gate driving circuit provided in an embodiment of the present application, and fig. 7 is another schematic diagram of a gate driving circuit provided in an embodiment of the present application, referring to fig. 1 to fig. 7, alternatively, a display panel 100 includes a pixel driving circuit 170 corresponding to a light emitting element 9, and the pixel driving circuit 170 includes a driving current output terminal 16;

The main conductive pad unit 4 includes a first pad 41 and a second pad 42 provided to be insulated from each other, and the spare conductive pad unit 5 includes a third pad 53 and a fourth pad 54 provided to be insulated from each other, the first pad 41 and the third pad 53 being electrically connected to the driving current output terminal 16; when the light emitting element 9 is electrically connected to the main conductive pad unit 4, the second pad 42 is connected to the first voltage signal terminal 17, the fourth pad 54 is disconnected from the first voltage signal terminal 17, and the fourth pad 54 is electrically connected to the first lead 10; when the light emitting element 9 is electrically connected to the spare conductive pad unit 5, the fourth pad 54 is connected to the first voltage signal terminal 17 and disconnected from the first lead 10.

Referring to fig. 1 to fig. 7, in particular, the display panel 100 provided in the present application further includes a pixel driving circuit 170 correspondingly electrically connected to the conductive pad set, and a gate circuit 160 disposed between the pixel driving circuit 170 and the touch chip 11, optionally, the pixel driving circuit 170 and the gate circuit 160 may be both disposed on the array layer 6, and the gate circuit 160 is configured to provide an electrical signal to the light emitting element 9 via the conductive pad set so as to control the on and off of the light emitting element 9.

In the conductive pad group provided in the present application, any one of the main conductive pad units 4 includes a first pad 41 and a second pad 42 which are disposed to be insulated from each other, and any one of the spare conductive pad units 5 includes a third pad 53 and a fourth pad 54 which are disposed to be insulated from each other. The pixel driving circuit 170 includes a driving current output terminal 16, the first pad 41 and the third pad 53 included in the gate circuit 160 are electrically connected to the driving current output terminal 16, and the driving current output terminal 16 can be electrically connected to the sub-pixel through a pixel driving circuit 170; referring to fig. 7, the pixel driving circuit 170 provided in the present application may be a 7T1C circuit commonly used in the art as shown in the drawings, but this is only an embodiment of the pixel driving circuit 170 provided in the present application, and the present application does not limit the pixel driving circuit to be the 7T1C circuit shown in fig. 7, and other types of pixel driving circuits are also selected under the premise of ensuring the display and touch functions of the display panel 100.

In the initialization stage of the pixel driving circuit 170 in fig. 7, the transistor T5 is turned on and the transistor T7 is turned off; the voltage of the first initialization signal terminal Vref is transmitted to the first node N1 by the transistor T5 to initialize the driving transistor T2. In the data writing stage, the transistor T5 and the transistor T7 are turned off, the transistor T3 and the transistor T6 are turned on, and the data signal terminal Vdata transmits a data signal to the second node N2; the signal of the second node N2 is transmitted to the third node N3 through the driving transistor T2, and the signal of the third node N3 is transmitted to the first node N1 through the transistor T3, so that the potential of the first node N1 is increased; in the light emitting stage, the transistors T3 and T6 are turned off, the transistors T1 and T4 are turned on, and the driving current generated by the driving transistor T2 is transmitted to the light emitting element 9, so that the light emitting element 9 emits light.

When the light emitting element 9 is electrically connected to the main conductive pad unit 4, the second pad 42 is electrically connected to the first voltage signal terminal 17, and the fourth pad 54 is disconnected from the first voltage signal terminal 17; specifically, a first electrically controllable terminal group 19 (a first terminal 191 and a second terminal 192) is included between the first voltage signal terminal 17 and the fourth pad 54, and when the light emitting element 9 is electrically connected to the main conductive pad unit 4, the first terminal 191 and the second terminal 192 are insulated by disconnecting the electrical signal transmission path between the fourth pad 54 and the first voltage signal terminal 17, that is, by not conducting the electrical signal transmission capability between the first terminal 191 and the second terminal 192; at this time, the first voltage signal terminal 17 may transmit an electrical signal for controlling whether the light emitting element 9 emits light to the light emitting element 9 electrically connected to the main conductive pad unit 4, but may not transmit an electrical signal to the spare conductive pad unit 5 through the first terminal 191 and the second terminal 192. That is, by controlling the first voltage signal terminal 17 to transmit an electrical signal for turning on the light emitting element 9 electrically connected to the main conductive pad unit 4 to the second pad 42, whether the light emitting element 9 electrically connected to the main conductive pad unit 4 can emit light normally or not is detected, and if the detected light emitting element 9 can emit light normally, the spare conductive pad unit 5 corresponding to the detected light emitting element can be in an idle state, so that the fourth pad 54 in the spare conductive pad unit 5 is multiplexed as a part of the touch electrode (the touch electrode sub-portion 121); at this time, the fourth pad 54 (the touch electrode sub-portion 121) is disconnected from the first voltage signal terminal 17, and the fourth pad 54 (the touch electrode sub-portion 121) can be electrically connected to the first lead 10 through the second electrically controllable terminal set 20 (the third terminal 201 and the fourth terminal 202), the first lead 10 is electrically connected to the touch chip 11, and then the first lead 10 can transmit an electrical signal to the fourth pad 54 in the standby conductive pad unit 5 through the second electrically controllable terminal set 20, and a plurality of adjacently disposed fourth pads 54 (the touch electrode sub-portion 121) in an idle state are electrically connected through the second lead 112, and further electrically connected to the touch chip 11 through the first lead 10 to form a touch electrode 12 for realizing the touch function of the display panel 100.

It should be noted that, when the first lead 10 transmits an electrical signal to the backup conductive pad unit 5 through the second electrically controllable terminal set 20, the electrical signal may be transmitted between the third terminal 201 and the fourth terminal 202, and the third terminal 201 and the fourth terminal 202 may be electrically connected by a Laser chemical vapor deposition (Laser CVD) method because the third terminal 201 and the fourth terminal 202 are originally in an insulating state. In this way, the spare conductive pad unit 5 (the fourth pad 54) in the idle state is multiplexed as the touch electrode sub-portion 121 in the present application, so as to realize the touch function of the display panel 100 by multiplexing the original components in the display panel 100, without additionally increasing the film structure of the display panel 100 for the arrangement of the touch electrodes 12, which is beneficial to simplifying the manufacturing process of the whole display panel 100, and also beneficial to the design requirement of the display panel 100 for thinning, and meanwhile, reduces the consumable material required for manufacturing the display panel 100, i.e. is beneficial to improving the production efficiency of the display panel 100 and effectively reducing the production cost of the display panel 100.

If the detected light emitting element 9 electrically connected to the first voltage signal terminal 17 through the main conductive pad unit 4 cannot normally emit light, it can be determined that the light emitting element 91 is in a problem or that the main conductive pad unit 4 and the light emitting element 91 cannot normally be conducted; at this time, the first voltage signal terminal 17 transmits the electrical signal to the fourth pad 54 through the first electrically controllable terminal group 19 by electrically connecting the first terminal 191 and the second terminal 192 by a Laser chemical vapor deposition (Laser CVD); further, the third terminal 201 and the fourth terminal 202 are electrically disconnected by a Laser cutting (Laser Cut) process, and the light emitting element 9 is disposed on the side of the spare conductive pad unit 5 away from the array layer 6, so that the first voltage signal terminal 17 can transmit and control the on and off of the light emitting element 9 electrically connected to the spare conductive pad unit 5, and the transmission of the electrical signal between the first lead 10 and the spare conductive pad unit 5 is disconnected. In this case, when the light emitting element 9 electrically connected to the main conductive pad unit 4 cannot emit light normally, the corresponding standby conductive pad unit 5 is used to set the light emitting element 9, so as to avoid the state that the sub-pixel area 3 cannot emit light normally in the display area 1, and ensure the normal light emission of the display panel 100.

With continued reference to fig. 1-6, optionally, the fourth pad 54 in any one of the touch electrodes 12 is electrically connected to the touch chip 11 through the first lead 10.

Specifically, when the standby conductive pad unit 5 in the idle state, that is, the standby conductive pad unit 5 without electrically connecting the light emitting element 9 is multiplexed to be the touch electrode sub-portion 121, the fourth pad 54 is electrically connected to the touch chip 11 through the first lead 10, the touch chip 11 transmits an electrical signal to the fourth pad 54 through the first lead 10, and the plurality of adjacently disposed fourth pads 54 may be electrically connected through the second lead 112, and further electrically connected to the plurality of fourth pads 54 through the first lead 10 to form a complete touch electrode 12, so that the touch chip 11 transmits an electrical signal to the fourth pad 54 through the first lead 10, that is, transmits an electrical signal to the touch electrode 12 through the first lead 10, thereby realizing the touch function of the display panel 100. In this way, when the light emitting element 9 electrically connected with the main conductive pad unit 4 cannot emit light normally in the present application, the standby conductive pad unit 5 (the fourth pad 54) in the idle state is reused as the touch electrode sub-portion 121, so as to realize the touch function of the display panel 100 by multiplexing the original components in the display panel 100, without additionally increasing the film structure of the display panel 100 for the arrangement of the touch electrode 12, which is beneficial to simplifying the manufacturing process of the whole display panel 100, also beneficial to the thin design requirement of the display panel 100, and also reduces the consumable material required for manufacturing the display panel 100, namely, is beneficial to improving the production efficiency of the display panel 100 and effectively reducing the production cost of the display panel 100.

Referring to fig. 2, 4 and 6, optionally, the light emitting element 9 is a light emitting diode, and the light emitting element 9 is disposed on a side of the conductive pad set away from the array layer 6; the light emitting element 9 includes a first electrode 92 and a second electrode 93, the first electrode 92 is electrically connected to the first pad 41, and the second electrode 93 is electrically connected to the second pad 42; alternatively, the first pole 92 is electrically connected to the third pad 53, and the second pole 93 is electrically connected to the fourth pad 54.

Specifically, the light emitting elements 9 in the present application are disposed on a side of the conductive pad group away from the substrate 7, and the light emitting elements 9 are electrically connected with the array layer 6 through the conductive pads, and the circuit structure disposed on the array layer 6 can be used to transmit voltage signals to the light emitting elements 9 to control the on and off of the light emitting elements 9. Specifically, the light emitting element 9 disposed on one side of the main conductive pad unit 4 or the light emitting element 9 disposed on one side of the standby conductive pad unit 5 in the present application may be a light emitting diode, specifically may be a flexible micro light emitting diode, that is, the light emitting element 9 may be disposed in the flexible display panel 100 for use, and further, the display panel 100 provided in the present application may also be a flexible display panel, so as to implement use thereof in a flexible display device.

The light emitting element 9 may comprise a light emitting body 94, i.e. an LED body, and may also comprise a first pole 92 and a second pole 93 electrically connected to the LED body; alternatively, the light emitting body 94 includes a P-type semiconductor layer, an N-type semiconductor layer, and a light emitting layer (not shown in the drawing) between the P-type semiconductor layer and the N-type semiconductor layer. The P-type semiconductor layer is electrically connected to the first electrode 92, the N-type semiconductor layer is electrically connected to the second electrode 93, and a voltage signal is supplied to the P-type semiconductor layer and the N-type semiconductor layer of the light emitting body 94 through the first electrode 92 and the second electrode 93, so that the P-type semiconductor layer and the N-type semiconductor layer are driven by the voltage signal to cause the light emitting layer to emit light, thereby realizing the light emission of the light emitting element 9.

When the light emitting element 9 is electrically connected to the main conductive pad unit 4, a first pole 92 of the light emitting element 9 may be disposed to be electrically connected to the first pad 41, and a second pole 93 may be disposed to be electrically connected to the second pad 42, wherein the first pole 92 is a long-pin positive pole and the second pole 93 is a short-pin negative pole. Or when the light emitting element 9 electrically connected to the main conductive pad unit 4 cannot normally emit light, the application resets the light emitting element 9 by using the standby conductive pad unit 5 to ensure that the light emitting element 9 can normally emit light in each sub-pixel region 3, and at this time, the first electrode 92 of the light emitting element 9 may be electrically connected to the third pad 53, and the second electrode 93 may be electrically connected to the fourth pad 54, where the first electrode 92 is a long-pin positive electrode and the second electrode 93 is a short-pin negative electrode.

The short-leg negative electrode of the light emitting element 9 is electrically connected with the conductive pad (the second pad 42/the fourth pad 54) close to the first voltage signal end 17, so that voltage signals can be normally transmitted through the light emitting diode, a circuit corresponding to the light emitting element 9 in the display panel 100 is guaranteed to be normally conducted, whether the light emitting element 9 electrically connected with the main conductive pad unit 4 is normal or not is accurately detected, the light emitting element 9 arranged on one side of the standby conductive pad unit 5 is also guaranteed to be capable of normally emitting light, normal light emitting of any sub-pixel area 3 in the display panel 100 is favorably controlled, the normal display state of the display panel 100 is guaranteed, and the yield of the display panel 100 is improved.

Referring to fig. 1, optionally, the display area 1 includes a plurality of pad rows arranged along a first direction, the main conductive pad unit 4 is located in an odd pad row, and the spare conductive pad unit 5 is located in an even pad row; alternatively, the main conductive pad cells 4 are located in even pad rows and the spare conductive pad cells 5 are located in odd pad rows.

Specifically, the display area 1 includes a conductive pad group disposed on a side of the array layer 6 facing the light-emitting surface of the display panel 100, the conductive pad group including a main conductive pad unit 4 and a standby conductive pad unit 5; the present application provides a manner of arranging a main conductive pad unit 4 in an odd-numbered pad row and a spare conductive pad unit 5 in an even-numbered pad row, wherein the conductive pad group arranged in a display area 1 can be arranged in an array along a row direction and a column direction, and the display area 1 comprises a plurality of pad rows arranged along a first direction and extending along a second direction; or the main conductive pad units 4 may be disposed in even pad rows, and the spare conductive pad units 5 may be disposed in odd pad rows (not shown), that is, the main conductive pad units 4 and the spare conductive pad units 5 in the display area 1 may be alternately arranged along the first direction, so that the main conductive pad units 4 and the spare conductive pad units 5 may be uniformly disposed in each sub-pixel area 3 in the display area 1, thereby ensuring the normal light-emitting of any sub-pixel area 3 in the application, and also realizing the multiplexing of the spare conductive pad units 5 in the idle state as the function of the touch electrode sub-portion 121 in the application.

Accordingly, the display area 1 of the display panel 100 of the present application may also include pad columns arranged along the second direction, and a conductive pad group arrangement is provided in such a manner that the main conductive pad units 4 are disposed in odd-numbered pad columns and the spare conductive pad units 5 are disposed in even-numbered pad columns (not shown); or the main conductive pad units 4 may be disposed in even pad columns, and the spare conductive pad units 5 may be disposed in odd pad columns (not shown), that is, the main conductive pad units 4 and the spare conductive pad units 5 in the display area 1 may be alternately arranged along the second direction, so that the main conductive pad units 4 and the spare conductive pad units 5 may be uniformly disposed in each sub-pixel area 3 in the display area 1, thereby ensuring the normal light-emitting of any sub-pixel area 3 in the application, and also realizing the multiplexing of the spare conductive pad units 5 in the idle state as the function of the touch electrode sub-portion 121 in the application.

Fig. 8 is a schematic layout view of a conductive pad group according to an embodiment of the present application, referring to fig. 1 and 8, alternatively, the display area 1 includes a plurality of pad rows arranged along a first direction and a plurality of pad columns arranged along a second direction, the main conductive pad units 4 and the standby conductive pad units 5 in any pad row are alternately arranged, and the main conductive pad units 4 and the standby conductive pad units 5 in any pad column are alternately arranged. In this embodiment, the conductive pad units with the same filling pattern represent the same main conductive pad unit 4 or the same spare conductive pad unit 5; as shown in fig. 8, each main conductive pad unit 4 provided in the present application includes two pads, and each spare conductive pad unit 5 also includes two conductive pads.

Specifically, the display area 1 of the display panel 100 includes a conductive pad group disposed on a side of the array layer 6 facing the light emitting surface of the display panel 100, and the conductive pad group includes a main conductive pad unit 4 and a standby conductive pad unit 5; the conductive pad groups disposed in the display area 1 in the present application may be arranged in an array along a row direction and a column direction, that is, the display area 1 includes a plurality of pad rows arranged along a first direction and a plurality of pad columns arranged along a second direction. The present application provides a further mode of arranging the conductive pad groups, that is, the main conductive pad units 4 and the standby conductive pad units 5 in any pad row are alternately arranged, and the main conductive pad units 4 and the standby conductive pad units 5 in any corresponding pad column are alternately arranged, so that it can be ensured that the main conductive pad units 4 and the standby conductive pad units 5 can be uniformly arranged in each sub-pixel region 3, and normal light-emitting of any sub-pixel region 3 in the present application can be ensured to be more uniform, and the multiplexing touch electrode sub-portion 121 of the present application is not affected to form the touch electrode 12.

It should be noted that, the specific arrangement of the main conductive pad unit 4 and the standby conductive pad unit 5 in the display area 1 of the display panel 100 is not limited to the above-mentioned exemplary manner, so long as each sub-pixel area 3 can be ensured to include a main conductive pad unit 4 and a standby conductive pad unit 5; that is, when the normal light emission of each sub-pixel region 3 of the display area 1 of the display panel 100 is not affected, and it can be ensured that enough standby conductive pad units 5 are multiplexed into the touch electrode sub-portion 121 to realize the touch function of the display panel 100, the specific arrangement modes of the main conductive pad unit 4 and the standby conductive pad units 5 in the display area 1 can be adjusted accordingly according to actual requirements.

Fig. 9 is a schematic diagram of a conductive pad set in a touch sensing area according to an embodiment of the present application, referring to fig. 1, 2 and 9, optionally, the front projection shapes and areas of the first pad 41 and the second pad 42 on the array layer 6 are the same, and the front projection shapes and areas of the third pad 53 and the fourth pad 54 on the array layer 6 are the same.

Specifically, the display area 1 of the display panel 100 includes a conductive pad set disposed on a side of the array layer 6 facing the light emitting surface of the display panel 100, where any one of the conductive pad sets includes a main conductive pad unit 4 and a standby conductive pad unit 5, where the main conductive pad unit 4 is composed of a first pad 41 and a second pad 42 that are disposed in an insulating manner, and the standby conductive pad unit 5 is composed of a third pad 53 and a fourth pad 54, where the front projection shapes and areas of the first pad 41 and the second pad 42 disposed on the array layer 6 may be the same, and the front projection shapes and areas of the third pad 53 and the fourth pad 54 on the array layer 6 may be the same, that is, at least the first pad 41 and the second pad 42 disposed in the display area 1 may be fabricated using the same template, and the third pad 53 and the fourth pad 54 disposed in the display area 1 may be fabricated using the same template, thereby simplifying the process steps of fabricating the conductive pad set in the display panel 100. In addition, the shapes and the areas of the first pad 41, the second pad 42, the third pad 53 and the fourth pad 54 in the main conductive pad unit 4 and the standby conductive pad unit 5 on the array layer 6 may be the same, as shown in fig. 1, that is, the manufacturing process of the display panel 100 may be simplified compared with the scheme that the shapes and the areas of the first pad 41 and the second pad 42 are the same and the shapes and the areas of the third pad 53 and the fourth pad 54 are the same. Even if the template for forming the conductive pad group is manufactured in advance, the present application provides at least some pads having the same shape and area, and can simplify the manufacturing process of the template, which is also advantageous for improving the manufacturing efficiency of the display panel 100.

Fig. 10 is another schematic diagram of a conductive pad set in a touch sensing area according to an embodiment of the present application, and referring to fig. 1, 2, 9, and 10, optionally, an orthographic projection area of the first pad 41 and/or the second pad 42 on the array layer 6 is smaller than an orthographic projection area of the third pad 53 and/or the fourth pad 54 on the array layer 6.

Specifically, the present application may also define that the area of the third pad 53 is larger than the area of the first pad 41 on the basis that the shape areas of the first pad 41 and the second pad 42 are set to be the same and the shape areas of the third pad 53 and the fourth pad 54 are set to be the same. Since the first pad 41 and the second pad 42 only serve to dispose the light emitting element 9, and the third pad 53 and the fourth pad 54 are used to dispose the new light emitting element 9 when the light emitting element 9 disposed on the corresponding main conductive pad unit 4 cannot normally emit light, but since the probability that the light emitting element 9 disposed on the main conductive pad unit 4 is problematic is only within 10%, the probability that the spare conductive pad unit 5 is used to electrically connect with the new light emitting element 9 is also less than 10%, i.e., more than 90% of the fourth pad 54 in the display area 1 of the display panel 100 can be multiplexed as the touch electrode sub-portion 121 for forming the touch electrode 12 in the display panel 100. The areas of the third pad 53 and the fourth pad 54 are larger, so that normal light emission of the light-emitting element 9 electrically connected with the main conductive pad unit 4 is not affected, and the formation of the touch electrode 12 is facilitated.

In addition, the area of the fourth pad 54 may be larger than that of the first pad 41, the second pad 42 and the third pad 53, mainly because the fourth pad 54 is used for electrically connecting with the first lead 10 to form the touch electrode 12, and the area of the fourth pad 54 is larger, which not only does not affect the normal light emission of the light emitting element 9 electrically connected with the main conductive pad unit 4, but also is beneficial to facilitating the formation of the touch electrode 12.

It should be noted that, in the present application, the first pad 41, the second pad 42, the third pad 53 and the fourth pad 54 may be all the same or different, and are not limited to the case of being rectangular as shown in fig. 9 of the present application, and may be adjusted according to the requirements in actual manufacturing. The first pad 41, the second pad 42, the third pad 53, or the fourth pad 54 may be formed in a rectangular shape, a circular shape, a triangular shape, an irregular pattern, or the like.

Fig. 11 is a flowchart of a method for detecting and maintaining a display panel according to an embodiment of the present application, referring to fig. 4 to fig. 6 and fig. 11, the present application further provides a method for detecting and maintaining a display panel 100, which is used for the display panel 100, wherein the main conductive pad unit 4 includes a first pad 41 and a second pad 42, and the standby conductive pad unit 5 includes a third pad 53 and a fourth pad 54;

The method comprises the following steps:

step 101, electrically connecting the light emitting elements 9 with the main conductive pad unit 4, connecting the second pad 42 to the first voltage signal terminal 17, disconnecting the fourth pad 54 from the first voltage signal terminal 17, and detecting the light emitting condition of the light emitting elements 9 in the display panel 100 by a detection platform;

step 102, if at least one light emitting element 9 does not emit light, connecting the fourth pad 54 of the sub-pixel area 3 corresponding to the non-light emitting element 9 to the first voltage signal terminal 17, disconnecting the second pad 42 from the first voltage signal terminal 17, and electrically connecting the light emitting element 9 to the spare conductive pad unit 5; the standby conductive pad units 5 in the sub-pixel area 3 corresponding to the light-emitting elements 9 with normal light emission are multiplexed as a part of the touch electrode 12; a part of the touch electrode 12 is a touch electrode sub-portion 121, and at least a part of the touch electrode sub-portions 121 are electrically connected to each other to form the touch electrode 12.

Specifically, the present application also provides a detection and maintenance method for the display panel 100, which is used for the display panel 100 described above, wherein the main conductive pad unit 4 provided in the display panel 100 includes the first pad 41 and the second pad 42, and the spare conductive pad unit 5 includes the third pad 53 and the fourth pad 54. The detection and maintenance method of the display panel 100 includes step 101 and step 102.

Step 101 is used to arrange the light emitting elements 9 on the side of the display panel 100, which is far away from the array layer 6, of the main conductive pad unit 4, electrically connect the light emitting elements 9 with the main conductive pad unit 4, electrically connect the second pad 42 with the first voltage signal terminal 17, and disconnect the fourth pad 54 from the first voltage signal terminal 17; specifically, a first electrically controllable terminal group 19 (a first terminal 191 and a second terminal 192) is included between the first voltage signal terminal 17 and the fourth pad 54, and when the light emitting element 9 is electrically connected to the main conductive pad unit 4, the first terminal 191 and the second terminal 192 are insulated by disconnecting the electrical signal transmission path between the fourth pad 54 and the first voltage signal terminal 17, that is, by not conducting the electrical signal transmission capability between the first terminal 191 and the second terminal 192; at this time, the first voltage signal terminal 17 may transmit an electrical signal for controlling whether the light emitting element 9 emits light to the light emitting element 9 electrically connected to the main conductive pad unit 4, but may not transmit an electrical signal to the spare conductive pad unit 5 through the first terminal 191 and the second terminal 192. That is, it is possible to detect whether the light emitting element 9 electrically connected to the main conductive pad unit 4 can normally emit light by controlling the first voltage signal terminal 17 to transmit an electric signal to the second pad 42 to turn on the light emitting element 9 electrically connected to the main conductive pad unit 4 while detecting the light emitting condition of the light emitting element 9 in the display panel 100 by using the detection means.

In step 102, if at least one light emitting element 9 does not emit light, i.e. if the detected light emitting element 9 electrically connected to the first voltage signal terminal 17 through the main conductive pad unit 4 cannot emit light normally, it can be determined that the light emitting element 9 provided therein has a problem or the main conductive pad unit 4 and the light emitting element 9 cannot be normally turned on; at this time, the first voltage signal terminal 17 transmits the electrical signal to the fourth pad 54 through the first electrically controllable terminal group 19 by electrically connecting the first terminal 191 and the second terminal 192 by a Laser chemical vapor deposition (Laser CVD); further, the third terminal 201 and the fourth terminal 202 are electrically disconnected by a Laser cutting (Laser Cut) process, and the light emitting element 9 is disposed on the side of the spare conductive pad unit 5 away from the array layer 6, so that the first voltage signal terminal 17 can transmit and control the on and off of the light emitting element 9 electrically connected to the spare conductive pad unit 5, and the transmission of the electrical signal between the first lead 10 and the spare conductive pad unit 5 is disconnected. In this case, when the light emitting element 9 electrically connected to the main conductive pad unit 4 cannot emit light normally, the corresponding standby conductive pad unit 5 is used to set the light emitting element 9, so as to avoid the state that the sub-pixel area 3 cannot emit light normally in the display area 1, and ensure the normal light emission of the display panel 100.

If the detected light emitting element 9 can emit light normally, the corresponding spare conductive pad unit 5 is in an idle state and is multiplexed as a part of the touch electrode 12 (touch electrode sub-portion 121). At this time, the fourth pads 54 are in a disconnected state with the first voltage signal terminal 17, and the fourth pads 54 can be electrically connected with the first lead 10 through the second electrically controllable terminal set 20 (the third terminal 201 and the fourth terminal 202), and the first lead 10 is electrically connected with the touch chip 11, so that the first lead 10 can transmit an electrical signal to the standby conductive pad unit 5 through the second electrically controllable terminal set 20, and a plurality of adjacently disposed fourth pads 54 in an idle state are electrically connected through the second lead 112, and further electrically connected to the touch chip 11 through the first lead 10 to form a touch electrode 12 for realizing the touch function of the display panel 100. It should be noted that, when the first lead 10 transmits an electrical signal to the backup conductive pad unit 5 through the second electrically controllable terminal set 20, the electrical signal may be transmitted between the third terminal 201 and the fourth terminal 202, and the third terminal 201 and the fourth terminal 202 may be electrically connected by a Laser chemical vapor deposition (Laser CVD) method because the third terminal 201 and the fourth terminal 202 are originally in an insulating state. In this way, the spare conductive pad unit 5 (the fourth pad 54) in the idle state is multiplexed as the touch electrode sub-portion 121 in the present application, so as to realize the touch function of the display panel 100 by multiplexing the original components in the display panel 100, without additionally increasing the film structure of the display panel 100 for the arrangement of the touch electrodes 12, which is beneficial to simplifying the manufacturing process of the whole display panel 100, reducing the design requirement of the display panel 100, and reducing the consumable materials required for manufacturing the display panel 100, i.e. improving the production efficiency of the display panel 100 and reducing the production cost of the display panel 100.

Referring to fig. 1 and 2, the method for manufacturing the display panel 100 in the present application includes: providing a substrate 7, forming an array layer 6 on the substrate 7, drawing a position where a metal material needs to be evaporated on one side of the array layer 6 far from the substrate 7, evaporating the metal material on the corresponding position to form a main conductive pad unit 4 and a standby conductive pad unit 5, arranging a light emitting element 9 above each main conductive pad unit 4, detecting whether the light emission of the arranged light emitting element 9 is normal, and electrically connecting a new light emitting element 9 to the light emitting element 91 which cannot emit light by utilizing the standby conductive pad unit 5 corresponding to the light emitting element 9 so as to ensure that any sub-pixel area 3 of the display panel 100 can emit light normally, thereby ensuring the normal display effect of the display panel 100.

Fig. 12 is a schematic diagram of a display device provided in an embodiment of the present application, please refer to fig. 12 and fig. 1, and further provides a display device 200 based on the same inventive concept, wherein the display device 200 includes a display panel 100, and the display panel 100 is any one of the display panels 100 provided in the present application.

It should be noted that, in the embodiments of the display device 200 provided in the embodiments of the present application, reference may be made to the embodiments of the display panel 100 described above, and repeated description is omitted. The display device 200 provided in the present application may be: any products and components with display functions such as mobile phones, tablet computers, televisions, displays, notebook computers, vehicle-mounted display screens, navigator and the like.

According to the embodiment, the display panel, the detection and maintenance method thereof and the display device provided by the invention have the following beneficial effects:

While certain specific embodiments of the invention have been described in detail by way of example, it will be appreciated by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.

Claims

1. The display panel is characterized by comprising a display area, wherein the display area comprises a plurality of sub-pixel areas which are arranged in an array, any one of the sub-pixel areas comprises a light-emitting element and conductive pad groups corresponding to the light-emitting element, and each conductive pad group comprises a main conductive pad unit and a standby conductive pad unit;

the display panel further comprises an array layer, at least part of the light emitting elements are electrically connected with the array layer through the main conductive pad unit; at least part of the standby conductive pad units which are not electrically connected with the light-emitting element are multiplexed into a part of the touch electrode.

2. The display panel of claim 1, wherein at least a portion of the light emitting elements are electrically connected to the array layer through the spare conductive pad units.

3. The display panel according to claim 1, further comprising a non-display region surrounding the display region, the non-display region being provided with a touch chip; the display panel further comprises a plurality of first leads, and the touch chip is electrically connected with the standby conductive pad unit through the first leads.

4. A display panel according to claim 3, wherein when the light emitting element in any one of the sub-pixel regions is electrically connected to the main conductive pad unit, the corresponding spare conductive pad unit is multiplexed as a part of a touch electrode, the part of the touch electrode is a touch electrode sub-portion, and at least part of the touch electrode sub-portions are electrically connected to each other to form a touch electrode.

5. The display panel of claim 4, further comprising a plurality of adjacently disposed touch sensing areas, any one of the touch sensing areas comprising one of the touch electrodes;

the display area comprises a first display area and a second display area, and the first display area is positioned at one side of the second display area far away from the touch chip along the direction that the touch chip points to the display area; the number of the first leads electrically connected to any one of the touch electrodes in the first display area is greater than the number of the first leads electrically connected to any one of the touch electrodes in the second display area; and the first leads of different strips are respectively and electrically connected with the touch electrode sub-parts of different strips.

6. The display panel of claim 4, wherein the touch electrode is a self-capacitive touch electrode.

7. A display panel according to claim 4 or 5, wherein the display panel comprises a pixel driving circuit corresponding to the light emitting element, the pixel driving circuit comprising a driving current output terminal;

the main conductive pad unit comprises a first pad and a second pad which are arranged in an insulating way, the standby conductive pad unit comprises a third pad and a fourth pad which are arranged in an insulating way, and the first pad and the third pad are electrically connected with the driving current output end; when the light emitting element is electrically connected with the main conductive pad unit, the second pad is connected to a first voltage signal terminal, the fourth pad is disconnected from the first voltage signal terminal, and the fourth pad is electrically connected with the first lead; when the light emitting element is electrically connected with the spare conductive pad unit, the fourth pad is connected to the first voltage signal terminal and disconnected from the first lead.

8. The display panel of claim 7, wherein the fourth pad in any one of the touch electrodes is electrically connected to the touch chip through the first lead.

9. The display panel of claim 8, wherein the light emitting elements are light emitting diodes, the light emitting elements being disposed on a side of the conductive pad group away from the array layer; the light emitting element includes a first pole electrically connected to the first pad and a second pole electrically connected to the second pad; or, the first pole is electrically connected with the third pad, and the second pole is electrically connected with the fourth pad.

10. The display panel of claim 1, wherein the display area includes a plurality of pad rows arranged in a first direction, the main conductive pad cells being located in odd-numbered pad rows, and the spare conductive pad cells being located in even-numbered pad rows; alternatively, the main conductive pad cells are located in even pad rows and the spare conductive pad cells are located in odd pad rows.

11. The display panel of claim 1, wherein the display area includes a plurality of pad rows arranged in a first direction and a plurality of pad columns arranged in a second direction, the main conductive pad cells and the spare conductive pad cells in any one of the pad rows are alternately arranged, and the main conductive pad cells and the spare conductive pad cells in any one of the pad columns are alternately arranged.

12. The display panel of claim 7, wherein the first and second spacers have the same orthographic projection shape and area on the array layer, and the third and fourth spacers have the same orthographic projection shape and area on the array layer.

13. The display panel of claim 7, wherein an orthographic projection area of the first pad and/or the second pad on the array layer is smaller than an orthographic projection area of the third pad and/or the fourth pad on the array layer.

14. A method for inspecting and maintaining a display panel according to any one of claims 1 to 13, wherein the main conductive pad unit includes a first pad and a second pad, and the spare conductive pad unit includes a third pad and a fourth pad;

the method comprises the following steps:

15. A display device comprising a display panel according to any one of claims 1-13.