CN114823830A

CN114823830A - Display module

Info

Publication number: CN114823830A
Application number: CN202210398472.1A
Authority: CN
Inventors: 李强; 刘汉辰; 鲜于文旭; 江应传; 张春鹏
Original assignee: Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
Current assignee: Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
Priority date: 2022-04-15
Filing date: 2022-04-15
Publication date: 2022-07-29

Abstract

The application provides a display module assembly, including a display panel, display panel has the display area, the district buckles, be located the wiring district between display area and the district of buckling, display panel is including the first substrate that stacks gradually the setting, the conducting layer, second substrate and drive circuit layer, wherein, first substrate is formed with the breach in the district of buckling, the second substrate is provided with the via hole in the wiring district, the drive circuit layer is including extending to the signal line in wiring district from the display area, the conducting layer is including extending to the connecting wire in wiring district from the district of buckling, the one end of connecting wire is exposed by the breach, the other end of connecting wire passes through via hole and signal line electric connection. This application is through setting up the connecting wire with signal line electric connection between two substrates to set up the breach that exposes the connecting wire on the first substrate in bending zone, make external circuit can be through connecting wire with signal transmission to display area, when guaranteeing display effect, has narrowed display panel's lower frame width, has improved the screen and has accounted for the ratio.

Description

Display module

Technical Field

The application relates to the technical field of display, in particular to a display module.

Background

An Organic Light Emitting Diode (OLED) display device has been classified as a next generation display technology with great development prospect because of its advantages of being thin, light, wide viewing angle, active light emission, continuously adjustable light emission color, low cost, fast response speed, low energy consumption, low driving voltage, wide working temperature range, simple production process, high light emitting efficiency, flexible display, etc.

The existing OLED display panel comprises a display area and an upper frame area, a lower frame area, a left frame area and a right frame area, wherein the lower frame area generally comprises a wire walking area and a terminal bending area (pad bending area), the wire walking area is provided with a fan-shaped wire (fanout wire), a VDD wire and a VSS wire, the width of an occupied frame is large, the bending radius of the pad bending area has a bending limit, the bending limit cannot be continuously reduced, the width of the lower frame area is large, the OLED display panel is difficult to realize a narrow frame, and the problem is urgently solved.

Disclosure of Invention

The application provides a display module assembly can reduce display panel's lower frame width, realizes narrow frame.

In order to achieve the purpose, the display module adopts the following technical scheme.

The application provides a display module, which comprises a display panel, wherein the display panel is provided with a display area, a bending area and a wiring area positioned between the display area and the bending area, the display panel comprises a first substrate, a conductive layer, a second substrate and a driving circuit layer which are sequentially stacked,

the first substrate is provided with a notch in the bending area, the second substrate is provided with a via hole in the wiring area, the driving circuit layer comprises a signal wire extending from the display area to the wiring area, the conducting layer comprises a connecting wire extending from the bending area to the wiring area, one end of the connecting wire is exposed out of the notch, and the other end of the connecting wire is electrically connected with the signal wire through the via hole.

Optionally, the display module further includes an external driving circuit, the external driving circuit includes a flexible circuit board, and the flexible circuit board is disposed on a side of the second substrate away from the driving circuit layer and electrically connected to the connection line exposed by the notch.

Optionally, the signal line includes a data signal line extending in a first direction, wherein an extending direction of the connection line is the same as an extending direction of the data signal line.

Optionally, an extension length of the flexible circuit board located in the notch in a second direction is the same as an extension length of the display area in the second direction, wherein the second direction is perpendicular to the first direction.

Optionally, one end of the flexible circuit board is electrically connected to the connection line exposed by the notch, the other end of the flexible circuit board is bent and fixed on the surface of the first substrate away from the second substrate, and the notch penetrates through the first substrate in the second direction.

Optionally, an anisotropic conductive adhesive is disposed in the notch, and the flexible circuit board is electrically connected to the connecting line exposed from the notch through the anisotropic conductive adhesive.

Optionally, the first substrate and the second substrate are made of the same material.

Optionally, the first substrate and the second substrate are both made of polyimide.

Optionally, the display panel further includes a light emitting functional layer disposed on the driving circuit layer and a packaging layer disposed on the light emitting functional layer, and the packaging layer extends from the display area to the wiring area.

Optionally, an edge of the notch is flush with a boundary of the encapsulation layer.

The application provides a display module, which comprises a first substrate with a notch in a bending area, wherein the notch is used for exposing a connecting wire in electrical connection with a signal wire, so that an external driving circuit can be electrically connected with the signal wire through the connecting wire, normal display of a display panel is guaranteed, the problem of large width of a lower frame caused by fanout wiring can be avoided, and an ultra-narrow frame is realized; meanwhile, the notch is arranged in the bending area and is positioned on one side, away from the driving circuit layer, of the second substrate, so that the film layer structure of the bending area can be simplified, the bending performance of the bending area is improved, and the bending radius is reduced.

Drawings

Fig. 1 is a schematic view of a first structure of a display module according to an embodiment of the present disclosure;

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

fig. 3 is a schematic view of a first structure of a display module according to a second embodiment of the present disclosure;

fig. 4 is a second structural schematic diagram of a display module according to a second embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application. Furthermore, it should be understood that the detailed description and specific examples, while indicating exemplary embodiments of the invention, are given by way of illustration and explanation only, and are not intended to limit the scope of the invention. In the present application, unless indicated to the contrary, the use of the directional terms "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, and more particularly to the orientation of the figures of the drawings; while "inner" and "outer" are with respect to the outline of the device.

The following disclosure provides many different embodiments or examples for implementing different features of the application. In order to simplify the disclosure of the present application, specific example components and arrangements are described below. Of course, they are merely examples and are not intended to limit the present application. Moreover, the present application may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, examples of various specific processes and materials are provided herein, but one of ordinary skill in the art may recognize applications of other processes and/or use of other materials. The following are detailed below, and it should be noted that the order of description of the following examples is not intended to limit the preferred order of the examples.

Example one

Fig. 1 is a first structural schematic diagram of a display module according to an embodiment of the present disclosure. Referring to fig. 1, the present application provides a display module, which includes a display panel 10, the display panel 10 has a display area a, a bending area c, a wiring area b between the display area a and the bending area c, the display panel 10 includes a first substrate 101, a conductive layer 102, a second substrate 103, and a driving circuit layer 104 sequentially stacked, wherein, the first substrate 101 is formed with a gap 01 in the bending region c, the second substrate 103 is provided with a via hole 02 in the routing region b, the driving circuit layer 104 includes signal lines 03 extending from the display area a to the wiring area b, the conductive layer 102 includes a connection line 04 extending from the bending region c to the routing region b, one end of the connecting wire 04 is exposed out of the notch 01, and the other end of the connecting wire 04 is electrically connected with the signal wire 03 through the via hole 02.

This application is through setting up connecting wire 04 with signal line 03 electric connection between two substrates to set up on the second substrate 103 of district c of buckling and expose connecting wire 04's breach 01, make external circuit pass through connecting wire 04 transmits the signal of telecommunication smoothly extremely display panel 10's display area a, when guaranteeing display effect, has optimized walk the circuit layout in line district can avoid walking the great problem of lower frame width that leads to because of setting up fanout and walk the line among the prior art, and can avoid setting up and directly extend to the great problem of the rete thickness of the district 03 of buckling that district c of buckling leads to from display area a in the signal line 03 of second substrate 103 one side, the great problem of radius of buckling, further narrow display panel 10's lower frame width, improved the screen and accounted for the ratio.

In this embodiment, the display panel 10 is, for example, a flexible OLED display panel, but the application does not limit the type of the display panel 10, and in other embodiments of the application, the display panel 10 may also be a flexible LCD display panel, a flexible Mini-LED display panel, or a flexible Micro-LED display panel.

In this embodiment, the display panel 10 has a display area a, a bending area c, and a routing area b located between the display area a and the bending area c. The display area a is provided with a light emergent side and a backlight side, and the light emergent side of the display area a is provided with a pixel unit for executing a display function; one end of the bending region c is connected with the display region a through the wiring region b, and the other end of the bending region c can be bent and fixed to the backlight side of the display region a, so that the frame width of the display panel 10 is narrowed; the wiring area b is used for arranging various wirings capable of transmitting electric signals, so that external electric signals can be smoothly transmitted to the display area a from the bending area c, and the pixel units of the display area a are driven to execute a display function.

In this embodiment, the display panel 10 includes four frame regions, i.e., an upper frame region, a lower frame region, a left frame region, and a right frame region, wherein the bending region c and the routing region b are both located in the lower frame region, for example.

In this embodiment, the display panel 10 includes a first substrate 101, a conductive layer 102, a second substrate 103, and a driving circuit layer 104, which are sequentially stacked. The first substrate 101 is provided with a notch 01 in the bending region c, the second substrate 103 is provided with a via hole 02 in the wiring region b, the driving circuit layer 104 includes a signal line 03 extending from the display region a to the wiring region b, the conductive layer 102 includes a connection line 04 extending from the bending region c to the wiring region b, one end of the connection line 04 is exposed by the notch 01, and the other end of the connection line 04 is electrically connected to the signal line 03 through the via hole 02. The display panel in the prior art also comprises a display area, a wiring area and a bending area, but signal lines in a driving circuit layer of the display panel directly extend from the display area to the bending area, the wiring area b is provided with fanout wiring, VDD wiring and VSS wiring, the film layer structure design of the display panel is complex, the extending length of the fanout wiring is long, and the width of a lower frame is large, the signal lines 03 for transmitting various electric signals are uniformly and electrically connected to various connecting lines 04 arranged on the same layer through via holes 02 formed in a second substrate 103, and the electric connection between an external driving circuit and various signal lines 03 is realized through a notch 01 formed in the bending area c, so that the wiring structure of the wiring area b can be optimized, the wiring design of the wiring is not required to be fanned out, and the frame width of the display panel 10 is reduced. In addition, the signal lines 03 of the display area a are led out to the outside of the display panel through the connection lines 04 positioned at the back side of the display panel, so that the bending radius of the bending area c can be further reduced. And, because the bending region c is provided with the notch 01, the film layer structure of the bending region c can be further simplified, and the bending performance of the bending region c is improved.

In this embodiment, the number of the notches 01 is one or more, the number of the via holes 02 is multiple, the number of the signal lines 03 is multiple, and the number of the connecting lines 04 is multiple.

In this embodiment, the display module further includes an external driving circuit, and the function of the external driving circuit includes transmitting an electrical signal to each type of signal line 03 of the display area a. The external driving circuit may be a chip on film including a flexible circuit board 20, or a composite structure of a printed circuit board and the flexible circuit board 20, wherein the flexible circuit board 20 is disposed on a side of the second substrate 103 away from the driving circuit layer 104, and is electrically connected to the connection line 04 exposed by the notch 01, that is, the flexible circuit board 20 is electrically connected to the connection line 04 in the notch 01 of the bending region c in a binding manner. The flexible circuit board 20 has a bending property, so that the bending property of the bending region c can be ensured; compared with the design form of arranging the flexible circuit board 20 on the display side in the prior art, the bending radius of the bending area c can be further reduced, so as to further reduce the frame width of the display panel 10.

In this embodiment, the display area a is provided with DATA signal lines (DATA lines) and SCAN signal lines (SCAN lines) arranged in a crisscross manner, the DATA signal lines 03 extend along a first direction X, and the SCAN signal lines 03 extend along a second direction, wherein the first direction X is perpendicular to the second direction.

In this embodiment, the signal lines 03 include data signal lines 03 extending along the first direction X, and the extending direction of the connection lines 04 is the same as the extending direction of the data signal lines 03, that is, the connection lines 04 also extend along the first direction X. Because all kinds the extending direction of connecting wire 04 is all the same to can make and be located all kinds of signal lines 03 homoenergetic of display area a can follow first direction X the connecting wire 04 is drawn forth, and then optimizes the line layout of walking line area b, avoids walking the fan-out design of line, reduces greatly walking line area b is in extending length on the first direction X.

Correspondingly, the flexible circuit board 20 includes a first portion located in the notch 01 and electrically connected to the connection line 04, and a second portion extending out of the notch 01, wherein an extension length of the first portion in the second direction is the same as an extension length of the display area a in the second direction, that is, an extension length of the flexible circuit board 20 located in the notch 01 in the second direction is the same as an extension length of the display area a in the second direction.

In this embodiment, one end of the flexible circuit board 20 is electrically connected to the connection line 04 exposed by the notch 01, and the other end of the flexible circuit board 20 is bent and fixed on the surface of the first substrate 101 away from the second substrate 103. Specifically, the bending center of the flexible circuit board 20 is located at the boundary between the flexible circuit board 20 and the AA line.

In this embodiment, the first substrate 101 has a first region overlapping with the second substrate 103 and a second region missing from the second substrate 103, the first region corresponds to a partial region in the bending region c, the routing region b, and the display region a, and the second region corresponds to the notch 01. The extension length of the notch 01 in the first direction X is smaller than that of the bending area c in the first direction X; the extending length of the notch 01 in the second direction is equal to the extending length of the bending region c in the second direction and is greater than the extending length of the display region a in the second direction. That is, the area of the notch 01 is smaller than the area of the bending region c, sidewalls are formed on both sides of the notch 01 in the first direction X, and the notch 01 penetrates through the first substrate 101 in the second direction. In addition, since the notch 01 penetrates the first substrate 101 in the second direction, the bending difficulty of the bending region c of the display panel 10 can be further reduced, and the bending performance can be improved.

In this embodiment, the flexible circuit board 20 is electrically connected to the connection line 04 through an anisotropic conductive adhesive. Specifically, an anisotropic conductive adhesive is disposed in the notch 01, and the flexible circuit board 20 is electrically connected to the connection line 04 exposed from the notch 01 through the anisotropic conductive adhesive.

In this embodiment, the material of the first substrate 101 is the same as that of the second substrate 103, and both are materials with flexible and bendable properties. Since the first substrate 101 and the second substrate 103 are made of the same material, the material types can be reduced, and the manufacturing cost of the display panel 10 can be reduced. Preferably, the first substrate 101 and the second substrate 103 are made of Polyimide (PI), although the material of the first substrate 101 and the second substrate 103 is not limited in this application, and in other embodiments of the present application, the material of the first substrate 101 and the second substrate 103 may also be at least one of polyethylene terephthalate (PET), Acrylonitrile Butadiene Styrene (ABS), Polyethylene (PE), Polymethacrylate (PMMA), Polycarbonate (PC), and polypropylene (PP).

Fig. 2 is a schematic view of a second structure of a display module according to an embodiment of the present disclosure, and referring to fig. 2, the display panel 10 includes, for example, a first substrate 101, a conductive layer 102, a second substrate 103, a Buffer layer (Buffer)105, a driving circuit layer 104, and a planarization layer 107, which are sequentially stacked, where the driving circuit layer 104 includes a thin film transistor, a capacitor, various signal lines 03, and various insulating layers 106 including a gate insulating layer and an interlayer dielectric layer. The display panel 10 further includes a pixel defining layer 108, a pixel unit 109 and an encapsulation layer 113 disposed on the planarization layer 107, wherein the pixel defining layer 108 is formed with a plurality of pixel defining openings, the pixel unit 109 includes a first electrode 110, a second electrode 112 and a light emitting functional layer 111 disposed between the first electrode 110 and the second electrode 112, and the encapsulation layer 113 includes a first inorganic encapsulation layer 114, a second organic encapsulation layer 115 and a third inorganic encapsulation layer 116.

In this embodiment, the encapsulation layer 113 is used to seal the pixel unit 109, so as to prevent external water and oxygen from invading the display panel 10 and affecting the normal display of the display panel 10. The encapsulation layer 113 extends from the display area a to the routing area b, that is, the encapsulation layer 113 is located in the display area a and the routing area b, and an edge of the encapsulation layer 113 is a boundary between the routing area b and the bending area c. The notch 01 is located in the bending area c outside the packaging area, so that the process difficulty of forming the notch 01 can be reduced. Further, an edge of the gap 01 is a boundary between the routing region b and the bending region c, that is, an edge of the gap 01 is flush with a boundary of the encapsulation layer 113.

In this embodiment, the notch 01 may be formed by a laser drilling process, and since the notch 01 is located in the bending region c where the encapsulation layer 113 is not disposed, that is, located outside the encapsulation region, the precision requirement of the laser drilling process can be reduced.

Example two

Fig. 3 is a schematic view of a first structure of a display module according to a second embodiment of the present disclosure; fig. 4 is a second structural schematic diagram of a display module according to a second embodiment of the present application. With reference to fig. 3 and 4, a second embodiment of the present application provides a display module, which includes a first substrate 101, a conductive layer 102, a second substrate 103, a buffer layer 105, a driving circuit layer 104, and a planarization layer 107, and a pixel defining layer 108, a pixel unit 109 and an encapsulating layer 113 disposed on the planarization layer 107, wherein, the first substrate 101 is formed with a gap 01 in the bending region c, the second substrate 103 is provided with a via hole 02 in the routing region b, the driving circuit layer 104 includes signal lines 03 extending from the display area a to the wiring area b, the conductive layer 102 includes a connection line 04 extending from the bending region c to the routing region b, one end of the connecting wire 04 is exposed out of the notch 01, and the other end of the connecting wire 04 is electrically connected with the signal wire 03 through the via hole 02.

The structure of the display module provided in embodiment two of the present application is similar to the structure of the display module provided in embodiment one of the present application, and details of the same parts in this application are omitted, except that in this embodiment, the first substrate 101 has a first region overlapping with respect to the second substrate 103 and a second region missing with respect to the second substrate 103, the first region corresponds to the routing region b and the display region a, and the second region corresponds to the notch 01. The extension length of the notch 01 in the first direction X is equal to the extension length of the bending region c in the first direction X; the extending length of the notch 01 in the second direction is equal to the extending length of the bending region c in the second direction, and is equal to the extending length of the display region a in the second direction. That is, the area of the notch 01 is equal to the area of the bending region c, the notch 01 is formed with a sidewall only on one side close to the routing region b in the first direction X, and the notch 01 penetrates through the first substrate 101 in the second direction.

To sum up, this application provides a display module assembly, display module assembly includes a display panel, display panel has the display area, buckles the district, is located the display area and buckles the wiring district between the district, display panel is including first substrate, conducting layer, second substrate and the drive circuit layer that stacks gradually the setting, wherein, first substrate is in the district of buckling is formed with the breach, the second substrate is in the wiring district is provided with the via hole, the drive circuit layer includes certainly the display area extends to the signal line in wiring district, the conducting layer includes certainly the district of buckling extends to the connecting wire in wiring district, the one end quilt of connecting wire the breach exposes, the other end of connecting wire passes through the via hole with signal line electric connection. This application is through setting up the connecting wire with signal line electric connection between two substrates to set up the breach that exposes the connecting wire on the first substrate in bending zone, make external circuit can be through connecting wire with signal transmission to display area, when guaranteeing display effect, has narrowed display panel's lower frame width, has improved the screen and has accounted for the ratio.

The display module provided by the embodiment of the present application is described in detail above, and a specific example is applied to explain the principle and the implementation manner of the present application, and the description of the above embodiment is only used to help understanding the method and the core idea of the present application; meanwhile, for those skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.

Claims

1. A display module comprises a display panel, which is characterized in that the display panel is provided with a display area, a bending area and a wiring area between the display area and the bending area, the display panel comprises a first substrate, a conductive layer, a second substrate and a driving circuit layer which are sequentially stacked,

2. The display module according to claim 1, further comprising an external driving circuit, wherein the external driving circuit comprises a flexible circuit board disposed on a side of the second substrate facing away from the driving circuit layer and electrically connected to the connecting wires exposed by the notch.

3. The display module according to claim 2, wherein the signal lines comprise data signal lines extending along a first direction, and wherein the connecting lines extend in the same direction as the data signal lines.

4. The display module according to claim 3, wherein an extension length of the flexible circuit board in the second direction within the notch is the same as an extension length of the display area in the second direction, wherein the second direction is perpendicular to the first direction.

5. The display module according to claim 4, wherein one end of the flexible circuit board is electrically connected to the connection line exposed by the gap, the other end of the flexible circuit board is bent and fixed on a surface of the first substrate facing away from the second substrate, and the gap penetrates through the first substrate in the second direction.

6. The display module assembly according to claim 2, wherein an anisotropic conductive adhesive is disposed in the gap, and the flexible circuit board is electrically connected to the connection line exposed from the gap through the anisotropic conductive adhesive.

7. The display module of claim 1, wherein the first substrate and the second substrate are made of the same material.

8. The display module according to claim 7, wherein the first substrate and the second substrate are made of polyimide.

9. The display module of claim 1, wherein the display panel further comprises a light emitting functional layer disposed on the driving circuit layer and an encapsulation layer disposed on the light emitting functional layer, the encapsulation layer extending from the display area to the routing area.

10. The display module of claim 9, wherein an edge of the notch is flush with a boundary of the encapsulation layer.