CN113009728B

CN113009728B - Display panel and display device

Info

Publication number: CN113009728B
Application number: CN202110306950.7A
Authority: CN
Inventors: 吴昊
Original assignee: Xiamen Tianma Microelectronics Co Ltd
Current assignee: Xiamen Tianma Microelectronics Co Ltd
Priority date: 2021-03-23
Filing date: 2021-03-23
Publication date: 2022-10-11
Anticipated expiration: 2041-03-23
Also published as: CN113009728A

Abstract

The invention discloses a display panel and a display device, wherein the display panel comprises a display area and a non-display area; the non-display area comprises a step area, and the step area comprises a second sub non-display area and a first sub non-display area positioned between the second sub non-display area and the display area; the display panel comprises an array substrate, a first electrode, a passivation layer, a second electrode and a binding pad, wherein the substrate, the first electrode, the passivation layer and the second electrode are sequentially arranged; the first electrode and the second electrode are both positioned in the display area and extend to the first sub non-display area, and the second electrode at least partially extends to the second sub non-display area; the step region includes at least one first via hole penetrating the passivation layer; the first electrode and the second electrode are electrically connected through the first through hole; the bonding pad is located in the second sub non-display area and electrically connected with the second electrode. The electric signals sent by the driving chip/flexible circuit board are transmitted to the first electrode in the step area through the second electrode, and the problems that the transmission of common voltage signals in the display panel is uneven and the edge images are ghost images are avoided.

Description

Display panel and display device

Technical Field

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

Background

The liquid crystal display panel has been widely used in electronic products such as televisions, notebook computers, mobile phones, personal digital assistants, and the like, so that the electronic products have display and/or touch functions, and meanwhile, because the liquid crystal display panel has the advantages of light and thin appearance and low power consumption, the experience of users is improved, and the liquid crystal display panel increasingly becomes a mainstream display panel.

The common electrode signal in the display panel is set to be conducted to the central common electrode through the drive chip and a peripheral connecting line (common voltage signal line) surrounding the display area, and the common electrode and the pixel electrode control the liquid crystal to rotate together so as to realize different picture display of the display panel. However, with the development of the current display panel technology, the size of the display panel is increased, and the market demand for setting the narrow lower frame of the driving chip area is met, in the prior art, when the common voltage signal of the lower frame of the display panel is removed to narrow the lower frame, the problems that the transmission of the common voltage signal of the display panel is uneven, the image ghost occurs at the edge of the display panel, and the like can be caused.

Disclosure of Invention

In view of the above, the present invention provides a display panel and a display device, so as to solve the problems of non-uniform transmission of common voltage signals and occurrence of edge image sticking in the display panel.

In a first aspect, the present application provides a display panel provided with a display area and a non-display area at least partially surrounding the display area; the non-display area comprises a step area, the step area comprises a first sub non-display area and a second sub non-display area, and the first sub non-display area is positioned between the second sub non-display area and the display area;

the display panel comprises an array substrate; the array substrate comprises a substrate, a first electrode, a passivation layer, a second electrode and a binding pad, wherein the first electrode, the passivation layer and the second electrode are positioned on one side of the substrate; wherein the second electrode is positioned on one side of the first electrode away from the substrate, and the passivation layer is positioned between the first electrode and the second electrode;

the first electrode is positioned in the display area and at least partially extends to the first sub non-display area;

the second electrode is positioned in the display area and at least partially extends to the first sub non-display area and the second sub non-display area;

the step region includes at least one first via hole penetrating the passivation layer; the first electrode and the second electrode are electrically connected through the first via;

the binding pad is located in the second sub non-display area and electrically connected with the second electrode.

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

Compared with the prior art, the display panel and the display device provided by the invention at least realize the following beneficial effects:

this application is through extending to first sub non-display area with the first electrode that the display area set up, realize first electrode and second electrode at the electricity of first sub non-display area through the passivation layer trompil, and then realize the conveying of the signal of telecommunication that driver chip flexible circuit board sent to first electrode through the second electrode, thereby under the prerequisite that keeps the narrow frame of display panel, it is inhomogeneous to avoid public voltage signal transmission among the display panel, the problem of edge picture ghost appears, improve display panel's picture display effect.

Of course, it is not necessary for any product in which the present invention is practiced to achieve all of the above-described technical effects simultaneously.

Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, 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 prior art display panel provided in the present application;

fig. 2 is a schematic view of a display panel according to an embodiment of the present disclosure;

fig. 3 is another schematic view of a display panel according to an embodiment of the present disclosure;

FIG. 4 is an AA' cross-sectional view of FIG. 3 according to an embodiment of the present application;

FIG. 5 is a cross-sectional view of a BB' of FIG. 3 according to an embodiment of the present disclosure;

fig. 6 is another schematic view of a display panel according to an embodiment of the present disclosure;

FIG. 7 is an AA' cross-sectional view of FIG. 6 according to an embodiment of the present application;

fig. 8 is another schematic view of a display panel according to an embodiment of the present disclosure;

FIG. 9 is a schematic diagram of the first electrode of FIG. 8 according to an embodiment of the present disclosure;

fig. 10 is a schematic view of a display device according to an embodiment of the present disclosure.

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, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.

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

Techniques, methods, and apparatus known to those 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 particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

Fig. 1 is a schematic view of a display panel in the prior art provided by the present application, please refer to fig. 1; with the development of current display panel technology, the size of the display panel 10 is increased, and the market demand that the setting area of the driver chip/flexible circuit board (IC/FPC) corresponds to the narrower lower frame is met, in the prior art, when the common voltage signal routing (shown in the area 02 in fig. 1) in the frame area of the display panel 10 is removed to narrow the lower frame, the problems of uneven transmission of the common voltage signal, image sticking at the edge of the display panel 10, and the like, of the display panel 10 may occur.

With continuing reference to fig. 1, it should be noted that the display panel provided in the present application is improved based on the prior art that, in order to meet the setting requirement of the narrow lower bezel, the common voltage signal routing in the lower bezel region for transmitting the electrical signal to the common electrode in the display region is removed, which causes the problems in the prior art that the transmission of the common voltage signal is not uniform, and the image sticking occurs at the edge of the display panel 10; that is, in the display panel provided in the present application, except that the lower frame is not provided, the common voltage signal lines in the remaining regions can be normally used to transmit electrical signals to the common electrode 01 in the display region. Here, the common voltage signal line 03 of the related art display panel 10 except for the lower frame region is shown in fig. 1.

Fig. 2 is a schematic view of a display panel according to an embodiment of the present disclosure, fig. 3 is another schematic view of the display panel according to the embodiment of the present disclosure, fig. 4 is an AA 'cross-sectional view of fig. 3 according to the embodiment of the present disclosure, fig. 5 is a BB' cross-sectional view of fig. 3 according to the embodiment of the present disclosure, wherein fig. 3 is a partial film structure of the display panel, which is not labeled with the partition condition shown in fig. 2 for clarity, please refer to fig. 3-5 in conjunction with fig. 2; the present application provides a display panel 100 provided with a display area 11 and a non-display area 12 at least partially surrounding the display area 11; the non-display area 12 includes a stepped area 13, the stepped area 13 includes a first sub non-display area 121 and a second sub non-display area 122, and the first sub non-display area 121 is located between the second sub non-display area 122 and the display area 11;

the display panel 100 includes an array substrate; the array substrate comprises a substrate 31, a first electrode 41, a passivation layer 32 and a second electrode 42 which are positioned on one side of the substrate 31, and a binding pad 123; wherein, the second electrode 42 is located on the side of the first electrode 41 away from the substrate 31, and the passivation layer 32 is located between the first electrode 41 and the second electrode 42;

the first electrode 41 is located in the display region 11 and at least partially extends to the first sub non-display region 121;

the second electrode 42 is located in the display region 11 and at least partially extends to the first sub non-display region 121 and a portion of the second sub non-display region 122;

the stepped region 13 includes at least one first via hole 321 penetrating the passivation layer 32; the first electrode 41 and the second electrode 42 are electrically connected through the first via hole 321;

the bonding pad 123 is located at the second sub non-display region 122, and the bonding pad 123 is electrically connected to the second electrode 42.

Specifically, the present application provides a display panel 100, the display panel 100 includes a display area 11 and a non-display area 12, and the present application provides an alternative embodiment in which the non-display area 12 is at least partially disposed around the display area 11. The display panel 100 includes a step area 13, the step area 13 is specifically located in the non-display area 12, and the step area 13 in the non-display area 12 specifically includes a first sub non-display area 121 and a second sub non-display area 122, where the first sub non-display area 121 is located between the second sub non-display area 122 and the display area 11.

The display panel 100 includes an array substrate, the array substrate includes a substrate 31, a first electrode 41, a passivation layer 32, and a second electrode 42, wherein the first electrode 41, the passivation layer 32, and the second electrode 42 are sequentially stacked on the substrate 31 toward the light exit surface side of the display panel 100, specifically, the second electrode 42 is disposed on the side of the first electrode 41 away from the substrate 31, and the passivation layer 32 is disposed between the first electrode 41 and the second electrode 42, wherein an orthographic projection of the first electrode 41 on the substrate 31 and an orthographic projection of the second electrode 42 on the substrate 31 at least partially overlap.

Specifically, the first electrode 41 and the second electrode 42 are both located in the display region 11 and both extend at least partially into the non-display region 12; specifically, the first electrode 41 may extend only to the first sub non-display region 121, and the second electrode 42 extends not only to the first sub non-display region 121 but also at least partially to the second sub non-display region 122. An alternative embodiment is provided herein in which the orthographic projection of the first electrode 41 on the substrate 31 is internal to the orthographic projection of the second electrode 42 on the substrate 31.

The stepped region 13 further includes a plurality of first through holes 321, each of the first through holes 321 being formed through the passivation layer 32 between the first electrode 41 and the second electrode 42 such that the first electrode 41 and the second electrode 42 can be electrically connected through the first through hole 321. The step area 13 of the display panel 100 further includes a bonding pad 123, the bonding pad 123 is used for bonding a driving chip or a flexible circuit board, the bonding pad 123 is located in the second sub non-display area 122, and the bonding pad 123 is electrically connected to the second electrode 42 through a trace 124, so as to conduct an electrical signal of the driving chip or the flexible circuit board to the first electrode 41 through the second electrode 42, so as to implement signal supply of the driving chip or the flexible circuit board to the first electrode 41. As shown in fig. 3 and 4, the bonding pad 123 of the driving chip or the flexible circuit board is electrically connected to the second electrode 42 through the trace 124, and further transmits the electrical signal to the first electrode 41 through the first through hole 321, so that the electrical signal can also be transmitted to the first electrode 41 through the lower frame position (step area).

It should be noted that, in the present application, the first electrode 41 is extended to the step region 13, so that the first electrode 41 can be electrically connected to the second electrode 42 in the step region 13, and the signal supply of the driving chip or the flexible circuit board to the first electrode 41 can be realized without affecting the circuit structure inside the display panel 100 and the effective working area of the display region 11 of the display panel 100; when the first electrode 41 extends to the step area 13, each position of the first electrode 41 located in the step area 13 can receive the electrical signal transmitted by the second electrode 42, and the electrical signal is transmitted to the first electrode 41 inside the display area 11 through the first electrode 41 located in the step area 13, so that the electrical signal can be transmitted to the first electrode 41 through the lower frame position (step area), which is beneficial to improving the uniformity of the electrical signal received by the first electrode 41 in the display area 11, and the work of the first electrode 41 is more stable. The electric signal of the first electrode 41 at the corresponding position in the display area 11 is uniform and stable, when the first electrode 41 and the second electrode 42 in the display area 11 generate an electric field to drive the liquid crystal molecules in the display panel to deflect, the movement of the liquid crystal molecules is more stable, the situation that the deflection of the liquid crystal molecules in a certain area (for example, near a step area) cannot reach a preset state is avoided, the ghost problem occurring in the display process of the display panel 100 is avoided, and the display effect of the display panel 100 is improved.

According to the display panel 100, on the premise that the space of the lower frame area of the display panel 100 is not increased, stable transmission of the electric signals received by the first electrode 41 in the display panel 100 is achieved, and the problem of residual images of the display panel 100 in a display state is avoided.

It should be noted that, in the display panel 100 provided in the above application, the first electrode 41 may be taken as a common electrode as an example, specifically, by extending the first electrode 41 (common electrode) to the first sub non-display area 121 of the lower frame area of the panel, so that the second electrode 42 extending to the first sub non-display area 121 and the second sub non-display area 122 in the lower frame area can receive the common voltage signal transmitted from the driving chip/flexible circuit board in the second sub non-display area 122, and transmit the common voltage signal to the first electrode 41 in the first sub non-display area 121 through the first through hole 321, at this time, the first electrode 41 can transmit the common voltage signal from the lower frame area to the first electrode 41 in the display area, and the disadvantage in the prior art that the common voltage signal can only be transmitted from other positions except the lower frame area to the first electrode in the display area is solved. The present application improves the stability of the first electrode 41 (common electrode) in the display panel 100 receiving the common voltage signal, while maintaining the narrow bezel design of the display panel 100. It should be noted that the first electrode 41 is taken as the common electrode only in an alternative embodiment provided in the present application, but the present application is not limited thereto, and other alternatives will be described in the following.

With reference to fig. 2 to fig. 5, optionally, the display panel 100 further includes a conductive layer 50, and the conductive layer 50 is located on the array substrate facing the light-emitting surface side of the display panel 100;

in the step region 13, the conductive layer 50 is located on the side of the second electrode 42 away from the substrate 31, and the conductive layer 50 is electrically connected to the second electrode 42.

Specifically, the display panel 100 further includes a conductive layer 50, and the conductive layer 50 can be used for transmission of an electrical signal. The conductive layer 50 in the display panel 100 of the present application is disposed on the light-emitting surface side of the array substrate facing the display panel 100; specifically, the conductive layer 50 disposed in the display panel 100 of the present application is at least partially located in the step region 13, and the present application provides an alternative embodiment that the conductive layer 50 is located on the side of the second electrode 42 away from the substrate 31, and is closely located on the side of the second electrode 42 away from the substrate 31, that is, the conductive layer 50 and the second electrode 42 are in direct contact, so as to directly realize the electrical connection between the conductive layer 50 and the second electrode 42.

The conductive layer 50 is in direct contact with the second electrode 42, so that the conductive layer 50 and the second electrode 42 in the step region 13 are on the contact surface thereof, and an electrical signal existing at each position of the contact surface area of the second electrode 42 can be transmitted to the conductive layer 50; because the conductive layer 50 can be used for transmitting the electrical signal, the conductive layer 50 having an electrical connection relationship is disposed right above the second electrode 42, the conductive layer 50 can be used to assist the second electrode 42 in transmitting the electrical signal to the first electrode 41, that is, the conductive layer 50 and the second electrode 42 are used for transmitting the electrical signal to the first electrode 41, so that the transmission of the electrical signal is more uniform, rapid and stable, thereby improving the uniformity of the electrical signal transmission in the display area 11 of the display panel 100, and ensuring the good display effect of the display panel 100.

It should be noted that, in the present application, other film layers not used for conducting may also be optionally included between the second electrode 42 and the conductive layer 50, at this time, the conductive layer 50 and the second electrode 42 need to be arranged in the step area 13 to realize electrical connection through the via hole between the conductive layer 50 and the second electrode 42, and the more uniform the position arrangement for realizing the electrical connection between the two is, the more uniform and stable the electrical signal finally transmitted to the first electrode 41 by the driving chip/flexible circuit board is.

With continued reference to fig. 2-5, optionally, in the step region 13, an orthogonal projection of the conductive layer 50 on the substrate 31 covers an orthogonal projection of the second electrode 42 on the substrate 31.

Specifically, the present application provides a setting mode of the conductive layer 50 and the second electrode 42 in the step area 13, specifically, the orthographic projection of the conductive layer 50 on the substrate 31 covers the orthographic projection of the second electrode 42 on the substrate 31, so that the entire upper surface of the second electrode 42 in the step area 13 is electrically connected to the conductive layer 50, and thus, the electric signal transmitted to the second electrode 42 by the driving chip/flexible circuit board can be further transmitted to the first electrode 41 by the aid of the conductive layer 50, so that the transmission of the electric signal is more uniform and stable, the uniformity of the transmission of the electric signal inside the display area 11 of the display panel 100 is improved, and the good display effect of the display panel 100 is ensured.

The conductive layer 50 is arranged on the step area 13, the first electrode 41 is extended to the step area 13, and the conductive layer 50, the second electrode 42 and the first electrode 41 are electrically connected in the step area 13, so that the stable transmission of an electric signal in the driving chip/flexible circuit board to the first electrode 41 in the display area 11 is realized. The problems that in the prior art, the transmission of the common voltage signal is uneven on the display panel 100, the image ghost occurs on the edge of the display panel 100, and the like caused by removing the routing of the common voltage signal of the lower frame of the display panel 100 are solved, and the area of the lower frame of the display panel 100 cannot be increased.

It should be noted that, as shown in fig. 3 and fig. 5, in a side region of the bonding pad 123 close to the display region 11, the present application provides an alternative arrangement that the second electrode 42 only extends to the first sub non-display region 121, so as to reduce the amount of material required for manufacturing the second electrode 42 and reduce the manufacturing cost of the entire display panel 100. And meanwhile, a certain area is set for the driving chip/the flexible circuit board, so that the design of the narrow-frame display panel is facilitated.

It should be further noted that, in a region of one side of the bonding pad 123 close to the display area 11, the second electrode 42 may also be selectively extended into the second sub non-display area 122, so as to increase the number of the routing lines 124 electrically connected to the second electrode 42 by the bonding pad 123, and the routing lines 124 are uniformly electrically connected to the second electrode 42 at one side of the second electrode 42 close to the bonding pad 123, so as to improve the transmission uniformity of the electrical signal. The two types of arrangement manners of the second electrode 42 in the step area provided herein are only exemplary and are not used to limit the present application, and a user may adjust the arrangement of the second electrode 42 in the step area according to his own needs.

Fig. 6 is another schematic diagram of a display panel provided in the embodiment of the present application, and fig. 7 is an AA 'cross-sectional diagram of fig. 6 provided in the embodiment of the present application, it should be noted that, a cross-sectional diagram of BB' corresponding to fig. 6 is also shown in fig. 5, and in fig. 6, for clarity of a part of a film structure of the display panel, a partition condition that has been shown in fig. 2 is not marked, please refer to fig. 5-fig. 7 in combination with fig. 2, optionally, as shown in fig. 5 and fig. 7, the display panel 100 further includes a first metal layer 60, and the first metal layer 60 is located between the substrate 31 and the first electrode 41;

the stepped region 13 further includes a conductive pad 61, the conductive pad 61 being located at the first metal layer 60;

in the second sub non-display region 122, the conductive pad 61 is electrically connected to the second electrode 42 through the first via hole 321, and the bonding pad 123 is electrically connected to the second electrode 42 through the conductive pad 61.

Specifically, the display panel 100 further includes a first metal layer 60, specifically located between the substrate 31 and the first electrode 41. The step region 13 further includes a conductive pad 61 disposed on the first metal layer 60; optionally, the conductive pad 61 is located in the second sub non-display region 122 in the orthogonal projection of the substrate 31, and then the conductive pad 61 is specifically disposed in the second sub non-display region 122, and the conductive pad 61 may be used to fill a gap between the second electrode 42 extending into the second sub non-display region 122 and the substrate 31, so as to improve the compression resilience of the inner space of the step region 13 of the display panel 100; and can also be used to prevent leakage of electromagnetic waves generated by circuits in the display panel 100 and reduce the risk of the display panel 100 malfunctioning due to electromagnetic waves.

In the second sub non-display region 122, the conductive pad 61 can be electrically connected to the second electrode 42 through the first through hole 321 penetrating through the passivation layer 32, the electrical signal output by the driving chip/flexible circuit board is electrically connected to the conductive pad 61 through the bonding pad 123 via the trace 124, and then the electrical signal is transmitted to the second electrode 42 through the conductive pad 61 after passing through the first through hole 321, and then transmitted to the first electrode 41 in the display region 11.

The conductive pad 61 is used for realizing the transmission of the electric signals, namely, the service life of the display panel 100 can be ensured, and the stable transmission of the electric signals to the first electrode 41 in the display area 11 can be realized under the condition that the space of the non-display area 12 of the display panel 100 is not increased; furthermore, the resistance of second electrode 42 is bigger, this application is through addding electrically conductive liner 61 in stepped area 13, so that can earlier in the signal transmission process through electrically conductive liner 61 after and then carry to second electrode 42, it is favorable to reducing the whole impedance on the signal transmission route also to add electrically conductive liner 61, reduce the voltage drop of signal transmission process, avoid the great unstable problem of signal transmission that arouses of second electrode 42 resistance, and then promoted the homogeneity of the signal of telecommunication in the display panel 100 face, avoid the ghost problem that display panel 100 shows the in-process and appear, the display effect of display panel 100 has been improved.

It should be added that, when the conductive layer 50 is disposed on the side of the second electrode 42 away from the substrate 31, the present application also provides an alternative embodiment that the conductive layer 50 is also directly electrically connected to the conductive pad 61, so that, when the conductive pad 61 receives an electrical signal transmitted from the driving chip/flexible circuit board, the electrical signal is simultaneously transmitted to the conductive layer 50 and the second electrode 42, and because the conductive layer 50 has a smaller resistance than the second electrode 42, when the electrical signal is received by the conductive layer 50 and the second electrode 42 and transmitted to the first electrode 41, the overall impedance on the electrical signal transmission path is reduced, the voltage drop in the electrical signal transmission process is reduced, the uniformity of the electrical signal in the display panel 100 is improved, and the display panel 100 is prevented from having a ghost phenomenon.

With continued reference to fig. 5-7, optionally, along the first direction, the conductive pads 61 are located at two end sides of the bonding pad 123; the first direction is a direction perpendicular to the display area and pointing to the step area.

Specifically, the present application provides an alternative arrangement that the conductive pads 61 may be disposed only at both end sides of the bonding pads 123 in a first direction, which is a direction perpendicular to the display area 11 toward the step area 13. So set up, when bonding pad 123 electricity is connected on electrically conductive liner 61 and the driver chip/the flexible circuit board, the transmission of signal of telecommunication is realized to the line 124 of the accessible of using shorter length, is favorable to reducing the use of consumptive material, and can not increase the space area of display panel 100 step district 13.

It should be noted that the present application does not limit the number of the driving chips/flexible circuit boards in one display panel 100, for example, when n driving chips/flexible circuit boards are disposed in the step area 13, the conductive pads 61 may be disposed on both end sides of each driving chip/flexible circuit board, that is, the number of the conductive pads 61 is, for example, 2n, where n is an integer greater than or equal to 1. So set up for the signal of telecommunication that each driver chip/flexible circuit board sent all can transmit through the both ends side direction second electrode 42 of display panel 100 step district 13, the signal delay that exists when only using one end transmission signal, the uneven problem of signal, thereby be favorable to improving transmission stability, the homogeneity of the signal of telecommunication, promote display panel 100's final display effect.

Fig. 8 is another schematic view of the display panel provided in the embodiment of the present application, and fig. 9 is a schematic view of the first electrode provided in fig. 8 provided in the embodiment of the present application, please refer to fig. 3 to fig. 9, alternatively, in the first sub non-display area 121, the first electrode 41 includes a plurality of sub-electrode bars 411.

Specifically, when the first electrode 41 extends from the display area 11 to the step area 13, specifically to the first sub non-display area 121, as shown in fig. 3 and fig. 6, two alternative extending manners are provided, in which, as shown in fig. 3 and fig. 6, an edge of the first electrode 41 at a boundary between the display area 11 and the non-display area 12 is a first edge, and the first edge of the first electrode 41 extends towards the step area 13 as a whole along a direction (an extending direction of the first electrode 41) in which the display area 11 points to the step area 13, and at this time, a front projection of a portion of the first electrode 41 extending to the first sub non-display area 121 on the substrate 31 is a whole surface shape, for example, a complete large rectangular strip shape. By directly extending the first electrode 41 to the first sub non-display region in the form of the whole first edge on the side close to the step region 13, in the manufacturing process, the first electrodes 41 in the display region 11 and the first non-display region 12 can be simultaneously manufactured by the same manufacturing process, so that the overall manufacturing process of the first electrode 41 can be simplified, and the manufacturing efficiency of the whole display panel 100 can be improved.

As shown in fig. 8 to 9, an edge of the first electrode 41 at a boundary between the display region 11 and the non-display region 12 is a first edge, and the first edge of the first electrode 41 at least partially extends toward the step region 13 along a direction (an extending direction of the first electrode 41) in which the display region 11 points to the step region 13, for example, the first edge of the first electrode 41 extends toward the step region 13 at the same interval, at this time, a forward projection of a portion of the first electrode 41 extending to the first sub-non-display region 121 on the substrate 31 is a plurality of small stripes, and specifically, the first electrode 41 may be a plurality of small stripes extending along a direction in which the display region 11 points to the step region 13; that is, the first electrode 41 includes a plurality of sub-electrode bars 411 in the first sub non-display area 121. The part extending from the first electrode 41 to the first sub non-display area 121 is set to be in a small strip shape, the whole edge of the first electrode 41 is not extended out to the first sub non-display area 121, which is beneficial to reducing consumable materials required for extending the first electrode 41, and materials required in the process of the display panel 100 are saved, meanwhile, the effect of stably transmitting signals to the first electrode 41 by the driving chip/flexible circuit board can be achieved, and the good display effect of the display panel 100 is ensured.

Alternatively, in the step area 13, the conductive layer 50 includes a plurality of sub-conductive portions 51 corresponding to the sub-electrode strips 411;

the orthographic projection of the sub-conductive part 51 on the substrate 31 covers the orthographic projection of the sub-electrode strip 411 on the substrate 31.

Specifically, when the first electrode 41 extends to the first sub non-display area 121 and the first electrode 41 is disposed to include a plurality of sub-electrode stripes 411, the present application may adjust the guiding layer accordingly, specifically, the conductive layer 50 is disposed to include a plurality of sub-conductive portions 51 corresponding to the sub-electrode stripes 411, wherein an orthographic projection of the sub-conductive portions 51 on the substrate 31 covers an orthographic projection of the sub-electrode stripes 411 on the substrate 31. With such an arrangement, the amount of consumable materials required for manufacturing the conductive layer 50 can be reduced, and the manufacturing cost of the display panel 100 can be reduced.

Since the conductive layer 50 in the stepped region 13 also covers the second electrode 42 in the orthographic projection of the substrate 31, the portion of the second electrode 42 extending to the stepped region 13 can also be made into a small strip shape corresponding to the sub-conductive portions 51, and each sub-conductive portion 51 is arranged to cover each corresponding small strip-shaped second electrode 42; therefore, the manufacturing cost of the display panel 100 is further reduced, and meanwhile, the stability of the driving chip/flexible circuit board for sending signals to the first electrode 41 can be improved, so that a good display effect of the display panel 100 is ensured.

Optionally, the first electrode 41 is a common electrode, and the second electrode 42 is a pixel electrode; alternatively, the first electrode 41 is a pixel electrode, and the second electrode 42 is a common electrode.

Specifically, the first electrode 41 and the second electrode 42 in the display panel 100 of the present application may be respectively set as a pixel electrode and a common electrode, for example, the first electrode 41 is a common electrode, and the second electrode 42 is a pixel electrode; alternatively, the first electrode 41 is a pixel electrode, and the second electrode 42 is a common electrode.

When the first electrode 41 is a common electrode and the second electrode 42 is a pixel electrode, the first electrode 41 is located on one side of the second electrode 42 close to the substrate 31, and when the electrical signal transmitted by the driving chip/flexible circuit board is a common voltage signal, the common voltage signal can be stably and uniformly transmitted to the first electrode 41 (common electrode) through the routing wire 124, the conductive pad 61 and the second electrode 42, so as to ensure that the first electrode 41 (common electrode) can receive the uniform and stable common voltage signal.

An alternative embodiment is provided in the present application, when the first electrode 41 is a pixel electrode and the second electrode 42 is a common electrode, the common voltage signal can be stably and uniformly transmitted to the second electrode 42 (common electrode) after passing through the routing line and the conductive pad 61, so as to ensure that the second electrode 42 (common electrode) can receive the uniform and stable common voltage signal.

It should be noted that, in the display panel 100 provided in the present application, the liquid crystal layer in the display area 11 may be disposed on a side of the first electrode 41 and the second electrode 42 away from the substrate 31, and the electric field generated by the first electrode 41 and the second electrode 42 controls the deflection of the liquid crystal molecules in the liquid crystal layer, so as to realize the display of the specific picture of the display panel 100.

Note that, of the first electrode 41 and the second electrode 42, an electrode on a side away from the substrate 31 and a side close to the liquid crystal layer is usually provided as a comb-shaped electrode, and an electrode on a side close to the substrate 31 may be a comb-shaped electrode, a full-surface electrode, or the like. The present invention provides only one alternative embodiment, and the shape setting of the electrode is not specifically limited in the present application, and the user can make corresponding adjustment according to the requirement.

Fig. 10 is a schematic diagram of a display device according to an embodiment of the present application, please refer to fig. 10 in combination with fig. 2 to 9, and based on the same inventive concept, the present application further provides a display device 200, where 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, for 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, and repeated descriptions are omitted. The display device 200 provided by the present application may be: any product and component with a display function, such as a mobile phone, a tablet computer, a television, a display, a notebook computer, a navigator and the like.

As can be seen from the above embodiments, the display panel and the display device provided by the present invention at least achieve the following advantages:

the application provides a display panel and display device, first electrode through setting up the display area extends to first sub non-display area, realize the electricity of first electrode and second electrode at first sub non-display area through the passivation layer trompil, and then realize the conveying of the signal of telecommunication that driver chip flexible circuit board sent to first electrode through the second electrode, thereby under the prerequisite that keeps the narrow frame of display panel, it is inhomogeneous to avoid public voltage signal transmission among the display panel, the problem of edge picture ghost appears, improve display panel's picture display effect.

Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that modifications can 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. A display panel characterized by being provided with a display area and a non-display area at least partially surrounding the display area; the non-display area comprises a step area, the step area comprises a first sub non-display area and a second sub non-display area, and the first sub non-display area is positioned between the second sub non-display area and the display area;

the display panel comprises an array substrate; the array substrate comprises a substrate, a first electrode, a passivation layer, a second electrode and a binding pad, wherein the first electrode, the passivation layer and the second electrode are positioned on one side of the substrate; wherein the second electrode is positioned on the side of the first electrode far away from the substrate, and the passivation layer is positioned between the first electrode and the second electrode;

the step region comprises at least one first through hole penetrating through the passivation layer; the first electrode and the second electrode are electrically connected through the first via;

the binding pad is positioned in the second sub non-display area and is electrically connected with the second electrode;

the display panel further comprises a conducting layer, and the conducting layer is positioned on the light emergent surface side of the array substrate facing the display panel;

in the step area, the conducting layer is positioned on one side, away from the substrate, of the second electrode, and the conducting layer is electrically connected with the second electrode.

2. The display panel according to claim 1, wherein an orthogonal projection of the conductive layer on the substrate overlaps an orthogonal projection of the second electrode on the substrate in the step region.

3. The display panel according to claim 1, further comprising a first metal layer between the substrate and the first electrode;

the step region further comprises a conductive pad located on the first metal layer;

in the second sub non-display region, the conductive pad is electrically connected with the second electrode through the first via hole, and the bonding pad is electrically connected with the second electrode through the conductive pad.

4. The display panel according to claim 3, wherein an orthogonal projection of the conductive pad on the substrate is located in the second sub non-display region.

5. The display panel according to claim 4, wherein the conductive pads are located on both end sides of the bonding pad in a first direction; wherein the first direction is a direction perpendicular to the display area and pointing to the step area.

6. The display panel according to claim 1, wherein the first electrode comprises a plurality of sub-electrode bars in the first sub-non-display region.

7. The display panel according to claim 6, wherein in the step area, the conductive layer includes a plurality of sub-conductive portions corresponding to the sub-electrode stripes;

the orthographic projection of the sub-conductive part on the substrate covers the orthographic projection of the sub-electrode strip on the substrate.

8. The display panel according to claim 1, wherein the first electrode is a common electrode and the second electrode is a pixel electrode; or, the first electrode is a pixel electrode, and the second electrode is a common electrode.

9. A display device characterized by comprising the display panel according to any one of claims 1 to 8.