CN110794988B

CN110794988B - Display module assembly and electronic equipment

Info

Publication number: CN110794988B
Application number: CN201911006633.2A
Authority: CN
Inventors: 吴稳
Original assignee: Vivo Mobile Communication Co Ltd
Current assignee: Vivo Mobile Communication Co Ltd
Priority date: 2019-10-22
Filing date: 2019-10-22
Publication date: 2021-12-03
Anticipated expiration: 2039-10-22
Also published as: CN110794988A; WO2021078054A1

Abstract

The invention discloses a display module and an electronic device, wherein the display module comprises: the touch panel comprises a cover plate, a polaroid, a first substrate and a second substrate which are sequentially stacked, wherein the second substrate comprises a first surface facing the first substrate and a second surface opposite to the first surface, the first surface and the second surface are both provided with FPCs, the second surface is provided with touch circuits, and the FPCs are connected with the touch circuits; at least one side surface of the second substrate is provided with at least one gap communicated with the first surface and the second surface, and the FPC on the first surface is electrically connected with the FPC on the second surface through the conductive connecting part arranged in the gap. According to the embodiment of the invention, the FPC and the touch circuit are arranged on the second substrate, the FPC on the first surface is electrically connected with the FPC on the second surface through the conductive connecting part arranged in the gap, and FOG binding does not occupy the lower edge of the second substrate, so that the lower black edge of the display module can be reduced, and the screen occupation ratio of the display module is improved.

Description

Display module assembly and electronic equipment

Technical Field

The invention relates to the technical field of communication, in particular to a display module and electronic equipment.

Background

With the rapid development of electronic products in recent years, mobile phones become a bright star and become the most interesting electronic products for the public without replacement. The development process of a few mainstream mobile phones is expected, and the larger the screen, the more exquisite the appearance and the thinner and lighter the mobile phone are. However, in recent years, the development of various mobile phone structures becomes a key point for the development of mobile phones, and mobile phone structure parts such as high strength, ultra-thin type, curved type, bending type and the like are beginning to become a focus of the market.

The mobile phone display screen is a window of a consumer sensing mobile phone, and for the mobile phone, the design of the display window is very important. The long-term use of 2D display screens and 2.5D curved glass display screens has not brought more surprise to the consumer, and 3D curved screens have given the consumer a strong visual impact, but are still not sufficiently qualitative changes.

The full screen is a screen design with the screen accounting for nearly 100%, most of the current mobile phones adopt the full screen narrow-frame design, the narrow-frame screen can provide an extremely visual effect for users, and meanwhile, a larger displayable area is realized on the same size of the mobile phone. Under the popularization of a full-face screen, the current display screen can already have narrow frames (the black edges are very small) On the left, right and upper three sides, although the scheme of fixing an Integrated Circuit (IC) Chip On Glass (Chip On Glass, COG) is changed into the scheme of fixing an IC Chip On a Flexible Printed Circuit (FPC) to further shorten the distance of a binding edge to reduce the lower black edge, the current extremely-critical point is that the FOG binding edge of the COF is attached to the Glass (FPC On Glass, FOG) and the FOG binding edge of a Touch Flexible Circuit board (Touch FPC, T-FPC) cannot have the same ultra-narrow frame as other edges. The flexible Active Matrix Organic Light Emitting Diode (AMOLED) display screen can bend the display area to an extremely lower black edge by fixing the IC Chip On the flexible Panel (COP), but the rigid AMOLED display screen (using glass as the substrate) cannot bend to an extremely lower black edge, and thus cannot further improve the screen duty ratio.

Disclosure of Invention

The invention provides a display module and electronic equipment, and aims to solve the problem that the lower black edge of the display module is large, so that the screen occupation ratio is low.

In order to solve the technical problem, the invention is realized as follows:

in a first aspect, an embodiment of the present invention provides a display module, including: a cover plate, a polarizer, a first substrate and a second substrate stacked in sequence,

the second substrate comprises a first surface facing the first substrate and a second surface opposite to the first surface, the first surface and the second surface are both provided with flexible circuit boards, the second surface is provided with touch control lines, and the flexible circuit boards are connected with the touch control lines;

at least one side surface of the second substrate is provided with at least one gap communicated with the first surface and the second surface, and the flexible circuit board on the first surface is electrically connected with the flexible circuit board on the second surface through the conductive connecting part arranged in the gap.

In a second aspect, an embodiment of the present invention further provides an electronic device, including the display module described above.

In the embodiment of the invention, the first surface and the second surface of the second substrate are both provided with the flexible circuit boards, the second surface is provided with the touch lines, the flexible circuit boards are connected with the touch lines, at least one side surface of the second substrate is provided with at least one gap communicated with the first surface and the second surface, the flexible circuit board on the first surface is electrically connected with the flexible circuit board on the second surface through the conductive connecting part arranged in the gap, and the FOG binding does not occupy the lower edge of the second substrate, so that the lower black edge of the display module can be reduced, and the screen occupation ratio of the display module is improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive labor.

FIG. 1 is a schematic structural diagram of a display module according to an embodiment of the invention;

FIG. 2 is a second schematic view of a display module according to an embodiment of the invention;

FIG. 3 illustrates a schematic view of a conductive connection in a gap according to an embodiment of the present invention;

reference numerals:

the touch display panel comprises a cover plate 1, a polarizer 2, a first substrate 3, a second substrate 4, a touch flexible circuit board 41, a main flexible circuit board 42, a connector 421, an integrated circuit chip 43, a conductive connecting part 5, an optical adhesive 6 and an anisotropic conductive adhesive film 7.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. 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 invention.

At present, the COF and the panel glass are generally bound on the lower end surface of the lower glass, and the T-FPC and the panel glass are bound on the lower end surface of the upper glass, so that the lower black edge of a display module is larger, and the screen occupation ratio is lower. Therefore, the embodiment of the invention provides a display module and electronic equipment, wherein the FOG of a COF structure and the FOG of a T-FPC in the prior art are designed to change the binding positions, the touch wiring of an upper glass substrate is arranged on the outer surface of a lower glass substrate, the T-FPC is bound at the bottom of the outer surface of the lower glass substrate, meanwhile, the wiring of a Low Temperature Polysilicon (LTPS) layer FOG binding area of the lower glass substrate is wound on the outer surface of the lower glass substrate, and a COF is bound on the outer surface of the lower glass substrate, so that the FOG binding does not occupy the lower edge of surface glass, the black edge under the display module is further reduced, the lower edge is as narrow as other edges, a full-screen with narrow frames at four sides is realized, and the screen occupation ratio is improved.

Specifically, as shown in fig. 1 to 3, an embodiment of the present invention provides a display module, including: apron 1, polaroid 2, first base plate 3 and the second base plate 4 that piles up in proper order, wherein:

the second substrate 4 comprises a first surface facing the first substrate 3 and a second surface opposite to the first surface, the first surface and the second surface are both provided with flexible circuit boards, the second surface is provided with touch control lines, and the flexible circuit boards are connected with the touch control lines;

at least one side surface of the second substrate 4 is provided with at least one gap communicating the first surface and the second surface, and the flexible circuit board on the first surface is electrically connected with the flexible circuit board on the second surface through a conductive connecting part 5 arranged in the gap.

Alternatively, as shown in fig. 2, the polarizer 2 and the cover plate 1 may be connected by an Optical Clear Adhesive (OCA) 6.

Optionally, the Main-flexible printed circuit (Main-FPC, M-FPC)42 on the second surface and the second substrate 4 may be connected by an Anisotropic Conductive Film (ACF) 7.

The touch control circuit is arranged in a mode of etching the touch control circuit by glass. The touch control circuit may include a plurality of conductive lines crossing each other, a plurality of polygonal meshes with irregular shapes formed by the plurality of conductive lines crossing each other, and a plurality of nodes respectively located at the intersections of the plurality of conductive lines, each node being a hollow ring structure. The form of the touch line is not limited.

In the above embodiment of the present invention, the first surface and the second surface of the second substrate 4 are both provided with a flexible circuit board, the second surface is provided with a touch conductive connection portion, the flexible circuit board is connected to the touch circuit, at least one side surface of the second substrate 4 is provided with at least one gap communicating the first surface and the second surface, the flexible circuit board on the first surface is electrically connected to the flexible circuit board on the second surface through the conductive connection portion 5 arranged in the gap, FOG binding does not need to occupy the lower edge of the second substrate 4, a lower black edge of the display module can be reduced, and a screen occupation ratio of the display module is improved.

Alternatively, as shown in fig. 1 to 3, the flexible circuit board may include:

and a main flexible circuit board 42 disposed on the first surface and the second surface, the main flexible circuit board 42 on the first surface being connected to the main flexible circuit board 42 on the second surface through a conductive connection portion 5 disposed in the gap.

Optionally, as shown in fig. 1 to 3, the flexible circuit board may further include:

the touch flexible circuit board 41 is disposed on the second surface, the touch flexible circuit board 41 is connected to the touch circuit, and the touch flexible circuit board 41 is electrically connected to the main flexible circuit board 42.

The main flexible circuit board 42 on the first surface is connected to the main flexible circuit board 42 on the second surface through the conductive connecting portion 5 disposed in the gap, the touch flexible circuit board 41 is connected to the touch circuit, and the touch flexible circuit board 41 is electrically connected to the main flexible circuit board 42 on the second surface to form a passage.

The corners on the walls of the gap may be rounded. The gap and the method for arranging the conductive connection part 5 in the gap may be:

the side face of the second substrate 4 is dug out through digging holes or gaps on the second substrate 4 (namely, the lower glass substrate), each hole or groove represents one pin wiring, the diameter of the digging hole (the width of the bound pin) can be set according to the size and the width of the second substrate 4, generally can be 30um, and the distance between the holes can be 10 um. The realization mode of the through hole or the gap can use laser to dig the hole, and the edges at the two sides of the second substrate 4 are also carved into fillets by laser while digging the hole so that the circular arcs of the metal routing are transited to the side edges and the back surface, thereby protecting the routing; after the second substrate 4 is provided with the through hole, a conductive connection part (such as a conductive circuit) is coated, the conductive circuit can be made of molybdenum Mo, aluminum Al, titanium Ti and the like, and can be made of a single-layer metal material or a multi-layer metal material, such as molybdenum aluminum molybdenum MoAlMo, the conductive circuit layer is coated in the through hole on the first surface, the second surface and the side surface of the second substrate 4 by a coating method such as vacuum sputtering, and then the conductive circuit pattern is obtained by exposure, etching and stripping. The thickness of the routing metal layer can be 1nm to 999nm, and preferably can be 350 nm.

The second substrate 4 completes the arrangement of the flexible circuit board, the touch circuit and the conductive circuit in the gap, the second substrate 4 (lower glass substrate) and the first substrate 3 (upper glass substrate) are attached, the first substrate 3 and the second substrate 4 are cut along the hollowed position of the second substrate 4, the cut first substrate 3 and the cut second substrate 4 are obtained, the first substrate 3 and the second substrate 4 are enabled to be flush, the main flexible circuit board 42 on the first surface can be connected with the main flexible circuit board 42 on the second surface through the conductive connecting part 5 arranged in the gap, the area of a lower black edge is reduced, and the screen occupation ratio is improved.

Optionally, an integrated circuit chip 43 is further disposed on the second surface of the second substrate 4, and the integrated circuit chip 43 is fixed on the main flexible circuit board 42 on the second surface.

The touch flexible circuit board 41 and the integrated circuit chip 43 are both bound on the second surface of the second substrate 4, the first substrate 3 and the second substrate 4 are the same in length (namely, the first substrate is flush with the second substrate), so that the bending radius of the touch flexible circuit board 41 in the prior art is reduced, the area of a black edge under a display module is reduced, and the reliability of the module is improved (namely, the pulling stress of the flexible circuit board on the first substrate and the second substrate is reduced).

Optionally, a connector 421 connected to a power supply is further disposed on the main flexible circuit board 42, and the main flexible circuit board 42 and the touch flexible circuit board 41 are connected to the power supply through the connector 421, so that the power supply supplies power to the main flexible circuit board 42 and the touch flexible circuit board 41.

In the above embodiment of the present invention, the first surface and the second surface of the second substrate 4 are both provided with a flexible circuit board, the second surface is provided with a touch conductive connecting portion, the flexible circuit board is connected to the touch conductive connecting portion, at least one side surface of the second substrate 4 is provided with at least one gap communicating the first surface and the second surface, the flexible circuit board on the first surface is electrically connected to the flexible circuit board on the second surface through the conductive connecting portion 5 arranged in the gap, FOG binding does not occupy the lower edge of the second substrate 4, the lower black edge of the display module can be reduced, the area of the display area is increased, the distance from the edge of the second substrate 4 to the edge of the cover plate 1 is reduced, and the screen occupation ratio of the display module is improved.

The embodiment of the invention also provides electronic equipment which comprises the display module in any embodiment.

The electronic device provided by the invention is described in detail through specific embodiments. For convenience of description, a mobile phone is taken as a specific example of the electronic device of the present invention for illustration, and it is understood by those skilled in the art that besides the mobile phone being taken as an electronic device, the present invention is also applicable to other electronic devices having a display module, such as a tablet computer, an electronic book reader, an MP3 (motion Picture Experts Group Audio Layer III) player, an MP4 (motion Picture Experts Group Audio Layer IV) player, a laptop computer, a car computer, a desktop computer, a set-top box, an intelligent television, a wearable device, and the like, which are within the protection scope of the embodiments of the present invention.

In the above-described embodiment of the present invention, by providing the flexible circuit board on both the first surface and the second surface of the second substrate 4, the second surface is provided with a touch conductive connecting part, the flexible circuit board is connected with the touch conductive connecting part, and, at least one gap communicating the first surface and the second surface is provided on at least one side of the second substrate 4, the flexible circuit board on the first surface passes through the conductive connection portion 5 provided in the gap, electrically connected to the flexible circuit board on the second surface, the FOG binding need not occupy the lower edge of the second substrate 4, can reduce the lower black edge of display module assembly, increase the area of display area, reduce the distance (H in fig. 1) of 4 edges of second base plate to apron 1 edge, improve the screen of display module assembly and account for the ratio.

The embodiments in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

While preferred embodiments of the present invention have been described, additional variations and modifications of these embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the embodiments of the invention.

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

While the preferred embodiments of the present invention have been described, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the following claims.

Claims

1. A display module, comprising: a cover plate (1), a polarizer (2), a first substrate (3) and a second substrate (4) stacked in sequence,

the second substrate (4) comprises a first surface facing the first substrate (3) and a second surface opposite to the first surface, the first surface and the second surface are both provided with flexible circuit boards, the second surface is provided with touch control lines, and the flexible circuit boards are connected with the touch control lines;

at least one side surface of the second substrate (4) is provided with at least one gap communicating the first surface and the second surface, and the flexible circuit board on the first surface is electrically connected with the flexible circuit board on the second surface through a conductive connecting part (5) arranged in the gap;

the flexible circuit board includes:

a main flexible circuit board (42) disposed on the first surface and the second surface, the main flexible circuit board (42) on the first surface being connected with the main flexible circuit board (42) on the second surface through a conductive connection portion (5) disposed in the gap.

2. The display module assembly of claim 1, wherein the flexible circuit board further comprises:

the touch flexible circuit board (41) is arranged on the second surface, the touch flexible circuit board (41) is connected with the touch circuit, and the touch flexible circuit board (41) is electrically connected with the main flexible circuit board (42).

3. A display module according to claim 1, wherein the second surface of the second substrate (4) is further provided with an integrated circuit chip (43), and the integrated circuit chip (43) is fixed on a main flexible circuit board (42) on the second surface.

4. The display module according to claim 1, wherein the main flexible circuit board (42) is further provided with a connector (421) connected to a power supply.

5. A display module according to claim 1, characterized in that the polarizer (2) and the cover plate (1) are connected by means of an optical glue (6).

6. The display module of claim 1, wherein the corners on the walls of the gap are rounded.

7. The display module according to claim 1, wherein the main flexible circuit board (42) of the second surface is connected to the second substrate (4) through an anisotropic conductive film (7).

8. An electronic device, comprising the display module according to any one of claims 1 to 7.

9. The electronic device of claim 8, wherein the electronic device comprises: at least one of a cell phone, a tablet, an e-book reader, an MP3 player, an MP4 player, a laptop, a car computer, a desktop computer, a set-top box, a smart tv, a wearable device.