WO2020221036A1

WO2020221036A1 - Display panel and display device

Info

Publication number: WO2020221036A1
Application number: PCT/CN2020/085516
Authority: WO
Inventors: 吴博; 毛维华; 盛建清; 查鹏
Original assignee: 华为技术有限公司
Priority date: 2019-04-29
Filing date: 2020-04-20
Publication date: 2020-11-05
Also published as: CN110275633A

Abstract

A display panel (1) and a display device. The display panel (1) has a first edge (101) and a second edge (102) which are provided opposite each other. The display panel (1) comprises: a touch flexible circuit board (4), a display flexible circuit board (5), a first rigid substrate (6) and a second rigid substrate (7) which are provided along a light emitting side away from the display panel (1). The second rigid substrate (7) is provided with a touch signal line (701); the touch flexible circuit board (4) has a first bending portion (401) bent from the first edge (101) to the rear side of the display panel (1); the first bending portion (401) is bound to the second rigid substrate (7); and the touch signal line (701) is in signal connection with the touch flexible circuit board (4). The first rigid substrate (6) is provided with a display circuit; a second bending portion (501) is bound to the first rigid substrate (6); and the display circuit is in signal connection with the display flexible circuit board (5). The display panel (1) effectively reduces the width of a bezel occupied by stacking a first bending portion (401) and a second bending portion (501) along a bending direction thereof, thereby facilitating the implementation of a narrow bezel design of a display device using the display panel (1).

Description

Display panel and display device

This application claims the priority of the Chinese patent application filed with the State Intellectual Property Office of China with application number 201910357499.4 on April 29, 2019, and the priority of the Chinese patent application with the title of “a display panel and display device”. The entire content is incorporated into this application by reference.

Technical field

This application relates to the technical field of display panels, and in particular to a display panel and a display device.

Background technique

At present, the screen-to-body ratio (the ratio of the display area of the display screen to the entire screen) of a full-screen mobile phone is increasingly required. In order to increase the screen-to-body ratio, the non-display area on the display panel is compressed to be smaller and smaller. For example, by setting gaps in the display area of the mobile phone, some devices on the mobile phone, such as cameras, receivers, ambient light sensors, infrared light sensors, or bio-optical sensors, can be placed in the gaps in the display area of the display screen. Alternatively, the narrow frame design of the display panel can be realized by bending a plurality of functional layers in the display area of the display panel to the side of the display panel opposite to the light emitting surface of the display panel.

However, when the multiple functional layers of the current display panel are bent, they are usually bent from the same frame. This will cause the bent portions of the multiple functional layers to stack on the same frame side of the display panel, thereby restricting the side of the display panel. Narrow frame design.

Summary of the invention

The present application provides a display panel and a display device to realize the narrow frame design of the display device.

In the first aspect, the present application provides a display panel, which can be applied to a mobile terminal. The display panel has a first side and a second side which are arranged oppositely, and the display panel includes: a touch flexible circuit board, a display flexible circuit board, a first rigid substrate, and a second rigid substrate, which are sequentially arranged in a direction away from the light emitting side of the display panel. A rigid substrate, and another laminated structure is also provided between the display flexible circuit board and the first rigid substrate. Wherein, the touch flexible circuit board has a first bending portion bent from the first side to the back side of the display panel, and at the same time, the display flexible circuit board has a second bending portion bent from the second side to the back side of the display panel. Folding part, the first bending part is bound to the surface of the second rigid substrate away from the first rigid substrate; the surface of the second rigid substrate away from the first rigid substrate is provided with a plurality of touch signal lines arranged in a crisscross pattern The multiple touch signal lines are signally connected to the touch flexible circuit board through the first bending portion. In the display panel of the present application, by bending the touch flexible circuit board and the display flexible circuit board from the opposite sides of the display panel to the back side of the display panel, unlike in the prior art, the touch flexible circuit board and Compared with bending the display flexible circuit board from the same side of the display panel, it can effectively reduce the width of the frame occupied by the stacking of the first bending part and the second bending part along the bending direction, thereby facilitating display The narrow frame design of the device.

The display panel generally includes a display area and a non-display area. The non-display area is arranged around the display area and is located at the edge of the display panel. In order to reduce the area occupied by the non-display area of the display panel, a special-shaped area can usually be arranged in the display area of the display panel, and then devices such as cameras, receivers, and ambient light sensors are arranged in the special-shaped area. In this application, the special-shaped area may be arranged at the end of the display panel close to the first side. In this way, in order to avoid the above-mentioned devices, the first bending part needs to be arranged to avoid the special-shaped area.

When specifically setting the above-mentioned special-shaped area, the special-shaped area may be a notch provided on the first side of the display panel, that is, a physical groove is provided on the first side of the display panel, and at the same time, the first rigid substrate and the corresponding second rigid substrate The position is also provided with a physical groove; or, the special-shaped area is only a gap provided in the display area of the display panel near the first side, and the gap extends to the inside of the display area. At this time, the first rigid substrate and the second rigid substrate are not provided Notch; or, the special-shaped area is a hole structure arranged at the end of the display area close to the first side, and no hole structure is arranged on the first rigid substrate and the second rigid substrate at this time. When the shaped area is a hole structure arranged at the end of the display area close to the first side, the hole structure can be a round hole structure, an oval hole structure, or a square hole structure, and of course, it can also be a hole structure of other shapes. I will not list them one by one.

In a possible implementation manner, there may be multiple first bending portions, so that the multiple first bending portions may be signally connected to the corresponding touch signal lines. Since there is one first bending portion, the more the number of touch signal lines connected to it, the larger the area occupied by the non-display area of the display panel on the first side, so by setting the first bending portion to If there are more than one, the number of touch signal lines correspondingly connected to each first bending portion can be reduced, thereby helping to reduce the area of the non-display area of the display panel on the first side.

When multiple first bending portions are specifically provided, the multiple first bending portions may be divided into two groups, and the number of the first bending portions in each group may be the same or different, and the two groups of first bending portions They are respectively arranged on both sides of the first bending portion, so that the layout of the multiple first bending portions is reasonable.

As a possible implementation, when the display flexible circuit board is specifically set up, the second bent portion of the display flexible circuit board may be bent from the second side to the back side of the display panel, and then bound to the first rigid substrate. The surface on one side of the second rigid substrate.

As a possible implementation manner, the first rigid substrate and the second rigid substrate may be but not limited to be bonded by an adhesive. Since the touch flexible circuit board and the display flexible circuit board are respectively bent on the two opposite sides of the display panel, and the touch signal line is arranged close to the first side, the difference between the first rigid substrate and the second rigid substrate When the adhesive near the second side is sintered, the clearance space of the touch signal line at the second side of the display panel can be reduced, thereby helping to reduce the area of the non-display area on the second side. In addition, the display panel can be further provided with a polarizer on the side of the second rigid substrate away from the first rigid substrate, in order to avoid burns when sintering the adhesive between the first rigid substrate and the second rigid substrate. The film is usually provided with a certain avoidance interval between the polarizer and the first bending part.

In a second aspect, the present application provides a display device including the display panel described in any one of the above.

In the above technical solution, by bending the touch flexible circuit board and the display flexible circuit board from the two opposite sides of the display panel to the back side of the display panel, it is the same as the touch flexible circuit board and the display flexible circuit in the prior art. Compared with the bending of the panel from the same side of the display panel, the width of the frame occupied by the stacking of the first bending part and the second bending part along the bending direction can be effectively reduced, thereby facilitating the realization of a narrow display device. Border design.

Description of the drawings

FIG. 1 is a front view of a display panel provided by an embodiment of the application;

2 is a rear view of the display panel provided by the embodiment of FIG. 1;

FIG. 3 is a schematic structural diagram of another display panel provided by an embodiment of the application;

4 is a rear view of the display panel provided by the embodiment of FIG. 3;

5 is a schematic structural diagram of another display panel provided by an embodiment of the application;

FIG. 6 is a rear view of the display panel provided by the embodiment of FIG. 5;

FIG. 7 is a schematic structural diagram of another display panel provided by an embodiment of the application;

FIG. 8 is a rear view of the display panel provided in the embodiment of FIG. 7;

9 is a schematic structural diagram of another display panel provided by an embodiment of the application;

10 is a rear view of the display panel provided by the embodiment of FIG. 9;

FIG. 11 is a schematic structural diagram of another display panel provided by an embodiment of the application;

FIG. 12 is a rear view of the display panel provided in the embodiment of FIG. 11;

FIG. 13 is a schematic structural diagram of another display panel provided by an embodiment of the application;

14 is a schematic structural diagram of another display panel provided by an embodiment of the application;

15 is a schematic structural diagram of another display panel provided by an embodiment of the application;

FIG. 16 is a schematic structural diagram of another display panel provided by an embodiment of the application;

FIG. 17 is a schematic structural diagram of another display panel provided by an embodiment of the application;

18 is a schematic structural diagram of another display panel provided by an embodiment of the application;

FIG. 19 is a schematic structural diagram of another display panel provided by an embodiment of the application;

20 is a schematic structural diagram of the segmented bonding of the touch flexible circuit board of the display panel provided by an embodiment of the application;

21 is a schematic diagram of the layer structure of the first side of the display panel provided by an embodiment of the application;

FIG. 22 is a schematic diagram of the layer structure of the second side of the display panel provided by an embodiment of the application.

Detailed ways

In order to make the objectives, technical solutions, and advantages of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings.

In order to facilitate the understanding of the display panel 1 provided by the embodiment of the present application, firstly, the application scenario of the display panel 1 will be explained. The display panel 1 provided by the embodiment of the present application can be applied to a display device with a full-screen display. The display device may be a mobile phone, for example. Common mobile terminals such as tablet computers, etc., of course, can also be other known mobile terminals. Usually, we call the end of the display device equipped with the camera and other devices as the upper end of the display device, and the end opposite to the upper end is the lower end of the display device. Correspondingly, the upper end of the display device has an upper frame and the lower end has a lower frame. For ease of description, in this application, the first side of the display panel 1 corresponds to the upper end of the display device, and the second side corresponds to the lower end of the display device.

In order to realize the narrow frame design of the display device, in the embodiment of the present application, the display panel 1 of the display device is mainly improved. However, it should be understood that the display device provided in the embodiment of the present application is a complete display device. With the structure of the known display device, only the components involved in implementing the narrow frame of the display device will be described in detail here, and other components will not be repeated. The display panel 1 and the display device will be described in detail below with reference to the drawings.

1 to 22, wherein Figure 1, Figure 3, Figure 5, Figure 7, Figure 9, Figure 11, and Figure 13 to Figure 19 are front views of the display panel 1, Figure 2, Figure 4, Figure 6, Figure 8. Figures 10 and 20 are rear views of the display panel 1. The rear views of the display panels shown in Figures 13 and 18 can refer to Figure 10; the display panels shown in Figures 14, 15, and 17 correspond to Refer to FIG. 8 for the rear view of the display panel; refer to FIG. 12 for the corresponding rear view of the display panel shown in FIG. 16 and FIG. 19; and FIG. 21 and FIG. 22 are cross-sectional views of the display panel 1. First, referring to Figure 1, Figure 3, Figure 5, Figure 7, Figure 9, Figure 11, and Figure 13 to Figure 19, when the display panel 1 is specifically set up, the display panel 1 includes a display area 2 and a non-display area 3. As shown in Figure 1, Figure 3, Figure 5, Figure 7, Figure 9, Figure 11, and Figure 13 to Figure 19, in some embodiments, the non-display area 3 is arranged around the display area 2 and is located Display the edge of panel 1. Of course, the non-display area 3 does not necessarily have to be arranged around the display area 2, and can also be arranged on a certain side or two sides of the display area 2. The non-display area 3 can also be set in a bangs shape, a drop shape, or the like. The above-mentioned display area 2 and non-display area 3 refer to the area on the display surface of the display panel 1.

21 and 22, in the display panel 1 of the present application, the layer structure of the display panel 1 may include: a touch flexible circuit board 4 and a display flexible circuit board 5 arranged in sequence along the direction away from the light emitting side of the display panel 1. , The first rigid substrate 6 and the second rigid substrate 7, specifically, the touch flexible circuit board 4 is provided with a signal channel for transmitting touch signals, the display flexible circuit board 5 is provided with a signal channel for transmitting display signals, the first The rigid substrate 6 may optionally be a TFT (thin film transistor) glass substrate, and the first rigid substrate 6 may be glass as a base, and a plurality of display circuits for realizing display functions are arranged on the glass base. The second rigid substrate 7 may optionally be a protective glass substrate, and the second rigid substrate 7 may be glass as a base, and a plurality of touch signal lines for realizing the touch function are provided on the glass base. It is worth noting that the arrangement of the touch flexible circuit board 4, the display flexible circuit board 5, the first rigid substrate 6 and the second rigid substrate 7 in sequence does not mean that these layer structures are in a sequential bonding relationship. It shows the relative positional relationship of these layer structures. For example, as shown in FIG. 21 and FIG. 22, another layered structure 11 may be provided between the display flexible circuit board 5 and the first rigid substrate 6. Wherein, when the touch flexible circuit board 5 is specifically set, the touch flexible circuit board 5 has a back side that is bent from the first side 101 to the display panel 1 (the back side of the display panel 1 refers to the light-emitting side away from the display panel 1 One side) of the first bending portion 401, showing that the flexible circuit board 5 has a second bending portion 501 bent from the second side 102 to the back side of the display panel 1, and the first bending portion 401 is bound to the second The surface of the rigid substrate 7 away from the first rigid substrate 6; the surface of the second rigid substrate 7 away from the first rigid substrate 6 is provided with a plurality of touch signal lines 701 which pass through the first rigid substrate 6; The bending portion 401 is connected to the signal channel signal used for transmitting the touch signal on the touch flexible circuit board 4. In the display panel 1 of the present application, by bending the touch flexible circuit board 4 and the display flexible circuit board 5 from two opposite sides of the display panel 1 to the back side of the display panel 1, the touch Compared with the technical solution in which the control flexible circuit board 4 and the display flexible circuit board 5 are bent from the same side of the display panel 1, the bending direction of the first bending portion 401 and the second bending portion 501 can be effectively reduced. The width of the frame occupied by the stack is beneficial to realize the narrow frame design of the display device.

In order to further reduce the area occupied by the non-display area 3 of the display panel 1, the display area 2 of the display panel 1 can usually be provided with a special-shaped area 8, and then devices such as cameras, receivers, and ambient light sensors are arranged in the special-shaped area 8. Referring to FIGS. 1, 3, 5, 7, 9, 11, and FIGS. 13 to 16, in the present application, the special-shaped area 8 may be disposed at the end of the display panel 1 close to the first side 101. In this way, in order to avoid the above-mentioned devices, the first bending portion 401 needs to be arranged to avoid the special-shaped area 8.

When the special-shaped area 8 is specifically provided, in the embodiments shown in FIGS. 1, 3, and 5, the special-shaped area 8 may be a physical groove 801 provided on the first side 101 of the display panel 1, and at the same time in the first rigid The corresponding positions of the substrate 6 and the second rigid substrate 7 are also provided with physical grooves, and the physical grooves 801 are provided on the display panel 1 along the first extension direction (in each embodiment of the present application, it is agreed that the display panel 1 has a vertical first An extension direction and a second extension direction, the direction from the first side 101 to the second side 102 is the middle position of the length of the second extension direction). Of course, the physical groove 801 can also be arranged at other positions of the display panel 1 along the first extension direction, and the first bending portion 401 only needs to be able to avoid the physical groove 801.

In addition to the above-mentioned setting method, the special-shaped area 8 can also be set with reference to the embodiments shown in FIG. 7, FIG. 9, FIG. 11 or FIG. 13 to FIG. 16. In the embodiments shown in FIG. 7, FIG. 9, and FIG. 11, the special-shaped area 8 is only provided in the display area 2 of the display panel 1 close to the notch 802 of the first side 101. At this time, in the first rigid substrate 6 and the second rigid substrate 6 The substrate 7 is not provided with a notch, and the notch 802 extends to the inside of the display area 2. In this embodiment, the special-shaped area 8 can be provided at various positions along the length of the display panel 1 along the first extension direction. The middle position of the length in the extension direction. In the embodiment shown in FIGS. 13 to 16, the special-shaped area 8 is a hole structure 803 provided at the end of the display area 2 close to the first side 101. At this time, the first rigid substrate 6 and the second rigid substrate 7 No hole structure is provided, the hole structure 803 can be a round hole structure, an oval hole structure or a square hole structure, of course, it can also be a hole structure of other shapes, which will not be listed here, and the hole structure 803 can be referred to The special-shaped area 8 is configured as a physical groove 801 or a notch 802 provided in the display area 2, which will not be repeated here. Of course, referring to FIGS. 17 to 19, the display panel 1 may not be provided with the special-shaped area 8.

When the first bending portion 401 is specifically provided, there may be one or more first bending portions 401. When there is one first bending portion 401, referring to FIGS. 1 and 3, the special-shaped area 8 is set on the display panel. 1 of the physical groove 801, the first bending portion 401 is located on the left or right side of the physical groove 801 (the left or right side of the physical groove 801 is the two sides of the physical groove 801 in the first extending

direction

7 and 9, the shaped area 8 is a notch 802 provided in the display area 2 of the display panel 1, and the first bending portion 401 is located on the left or right side of the notch 802; referring to FIGS. 13 to 15, the shaped area Area 8 is a hole structure 803 arranged at the end of the display area 2 close to the first side 101, and the first bending portion 401 is located on the left or right side of the hole structure 803; referring to FIGS. 17 and 18, when the display panel 1 When there is no special-shaped area 8, the first bending portion 401 can be set at will.

20, when there are multiple first bending portions 401 bent to the back side of the display panel 1, the multiple first bending portions 401 may be away from the second rigid substrate 7 of the display panel 1 away from the first rigidity. The surface binding of one side of the substrate 6 realizes the segmented binding of the touch flexible circuit board 4. Since there is only one first bending portion 401, the more touch signal lines 701 are connected, the area occupied by the display panel 1 in the non-display area 3 of the first side 101 after the touch data lines 701 are fanned out The larger; and by segmentally binding the touch flexible circuit board 6 and the second rigid substrate 7, the multiple first bending portions 401 can be connected to the corresponding number of touch signal lines 701 respectively, so that The number of touch signal lines 701 correspondingly connected to each first bending portion 401 is small, which is beneficial to reduce the area of the non-display area 3 of the display panel 1 on the first side 101, so that the display panel can be used The upper frame of the display device of 1 is effectively narrowed.

And when there are multiple first bending portions 401, the multiple first bending portions 401 can be divided into two groups, and the number of the first bending portions 401 in each group can be the same or different. In this way, refer to FIG. 20 In the embodiment, the two sets of first bending portions 401 are respectively arranged on both sides of the special-shaped area 8 along the first extension direction of the display panel 1, so that the arrangement layout of the multiple first bending portions 401 is reasonable.

21, when the display flexible circuit board 5 is specifically set up, the second bending portion 501 of the display flexible circuit board 5 is bent from the second side 102 to the back side of the display panel 1, and is bound to the first rigid substrate 6. The surface facing the second rigid substrate 7 side. The first rigid substrate 6 is provided with a plurality of display lines (the display lines include data lines, gate lines, etc.), and the display lines are signally connected to the signal channel for transmitting display signals on the display flexible circuit board 5 through the second bending portion 501. Since in the display panel 1, the second bending portion 501 of the display flexible circuit board 5 is bent from the position of the display panel 1 corresponding to the lower frame of the display device, the first bending portion 401 of the touch flexible circuit board 4 is bent from The display panel 1 is bent corresponding to the position of the upper frame of the display device. Compared with the prior art, this can effectively realize the narrow frame design of the lower frame of the display device.

Referring to FIGS. 21 and 22, as a possible implementation manner, the first rigid substrate 6 and the second rigid substrate 7 may be but not limited to be bonded by an adhesive 9. Since the touch flexible circuit board 4 and the display flexible circuit board 5 are respectively bent on the two opposite sides of the display panel 1, and the touch signal line 701 is arranged close to the first side 101, in this way, the first rigid substrate 6 When the adhesive 9 close to the second side 102 between the second rigid substrate 7 and the second rigid substrate 7 is sintered, the space for the touch signal line 701 at the second side 102 of the display panel 1 can be reduced, which is more conducive to reducing The area of the non-display area 3 located on the second side 102 is such that the lower frame of the display device adopting the display panel 1 is narrowed. In addition, the display panel 1 may also be provided with a polarizer 10 on the side of the second rigid substrate 7 away from the first rigid substrate 6, in order to avoid bonding glue 9 between the first rigid substrate 6 and the second rigid substrate 7. When the polarizer 10 is burned during sintering, a certain interval may also be generally provided between the polarizer 10 and the first bending portion 401.

Based on the display panel of the embodiment of the present application described above, the present application also provides a display device. Taking the display device as a mobile phone as an example, the display device includes the display panel 1 described in any of the foregoing embodiments. The display device can be a common mobile terminal such as a mobile phone or a tablet computer, and when the above-mentioned display panel 1 is used, the touch flexible circuit board 4 and the display flexible circuit board 5 are bent from two opposite sides of the display panel 1. To the back side of the display panel 1, compared with the touch flexible circuit board 4 and the display flexible circuit board 5 in the prior art that are bent from the same side of the display panel 1, the first bending portion 401 and the The width of the frame occupied by the second bending portion 501 is stacked along the bending direction, thereby facilitating the realization of a narrow frame design of the display device.

The above are only specific implementations of this application, but the scope of protection of this application is not limited to this. Anyone familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in this application, and they should all cover Within the protection scope of this application. Therefore, the protection scope of this application shall be subject to the protection scope of the claims.

Claims

A display panel, the display panel having a first side and a second side which are arranged oppositely, wherein the display panel includes a touch flexible circuit board and a display flexible circuit board arranged in sequence along the light emitting side away from the display panel. The circuit board, the first rigid substrate and the second rigid substrate, wherein:

The touch flexible circuit board has a first bending portion bent from the first side to the back side of the display panel;

The display flexible circuit board has a second bending portion bent from the second side to the back side of the display panel;

The second rigid substrate is provided with a touch signal line on a side away from the first rigid substrate, the first bending portion is bound to the second rigid substrate, and the touch signal line is connected to the touch Control the signal connection of the flexible circuit board;

A display circuit is provided on the surface of the first rigid substrate on one side close to the second rigid substrate, the second bending portion is bound to the first rigid substrate, and the display circuit is connected to the display flexible circuit board Signal connection.
The display panel according to claim 1, wherein an end of the display panel close to the first side is provided with a special-shaped area, the special-shaped area is used for arranging electronic devices, and the first bending portion avoids Open the special-shaped area setting.
3. The display panel according to claim 2, wherein the special-shaped area is a physical groove provided on the first side of the display panel.
The display panel according to claim 2, wherein the special-shaped area is a gap provided on the display area of the display panel close to the first side, or the special-shaped area is provided on the display panel The display area is close to the hole structure at the end of the first side.
The display panel according to claim 4, wherein the hole structure is a circular hole structure, an oval hole structure or a square hole structure.
3. The display panel according to claim 2, wherein there are a plurality of the first bending portions, and the plurality of the first bending portions are respectively connected to the corresponding touch signal line signal.
7. The display panel of claim 6, wherein a plurality of the first bending portions are respectively disposed on two sides of the special-shaped area.
The display panel of claim 1, wherein the display panel further comprises a polarizer disposed on a side of the second rigid substrate away from the first rigid substrate, the polarizer and the first rigid substrate The bending parts are arranged at intervals.
8. The display panel according to any one of claims 1 to 8, wherein the first rigid substrate and the second rigid substrate are bonded by an adhesive.
A display device, characterized by comprising the display panel according to any one of claims 1-9.