WO2021078054A1

WO2021078054A1 - Display module and electronic device

Info

Publication number: WO2021078054A1
Application number: PCT/CN2020/121141
Authority: WO
Inventors: 吴稳
Original assignee: 维沃移动通信有限公司
Priority date: 2019-10-22
Filing date: 2020-10-15
Publication date: 2021-04-29
Also published as: CN110794988A; CN110794988B

Abstract

A display module and an electronic device. The display module comprises: a cover plate (1), a polarizer (2), a first substrate (3) and a second substrate (4) stacked in sequence, wherein the second substrate (4) comprises a first surface facing the first substrate (3) and a second surface opposite the first surface; the first surface and the second surface are both provided with FPCs; a touch control circuit is arranged on the second surface, and the FPC is connected to the touch control circuit; at least one side face of the second substrate (4) is provided with at least one gap for making the first surface be in communication with the second surface; and the FPC on the first surface is electrically connected to the FPC on the second surface by means of a conductive connection portion (5) arranged in the gap.

Description

Display module and electronic equipment

Cross-references to related applications

This application claims the priority of Chinese Patent Application No. 201911006633.2 filed in China on October 22, 2019, the entire content of which is incorporated herein by reference.

Technical field

The present disclosure relates to the field of communication technology, and in particular to a display module and electronic equipment.

Background technique

With the rapid development of electronic products in recent years, mobile phones have become a shining star and irreplaceably have become the most concerned electronic products of the public. Looking forward to the development history of several major mainstream mobile phones, all of them are the bigger and bigger screen, the more refined the appearance, and the thinner and lighter mobile phones. However, in recent years, the bottleneck of mobile phone structural materials has greatly restricted the development of mobile phones to the extreme direction of ultra-thin and ultra-light. Therefore, the development of various mobile phone structural parts has become the key to the development of mobile phones. Mobile phone structural parts such as, bending, etc. began to become the focus of the market.

The mobile phone display is the window for consumers to sense the mobile phone. For mobile phones, the design of the display window is particularly important. The long-term use of 2D display screens and 2.5D curved glass display screens can no longer bring more surprises to consumers. 3D curved screens have already given consumers a strong visual impact, but they are still not enough to produce qualitative changes.

Full screen refers to a screen design with a screen-to-body ratio of close to 100%. At present, most mobile phones use a full-screen narrow bezel design. Narrow bezel screens can provide users with the ultimate visual effect while achieving a larger display on the same mobile phone size. area. With the popularity of full screens, the current display screens can have narrow borders on the left, right, and upper sides (the black borders are small), although the integrated circuit (IC) chip can be fixed on the glass (Chip The On Glass (COG) solution is changed to a solution that fixes the IC chip on the Flexible Printed Circuit (FPC) (Chip On FPC, COF), further shortening the distance of the binding edge to reduce the lower black edge, but the COF The FPC on the glass (FPC On Glass, FOG) binding side and the FOG binding side of the touch flexible circuit board (Touch FPC, T-FPC) still cannot achieve the same ultra-narrow frame as other sides. It is the ultimate key point at present. The flexible active matrix organic light emitting diode (Active Matrix Organic Light Emitting Diode, AMOLED) display can be fixed to the flexible panel (Chip On Panel, COP) by fixing the IC chip on the flexible panel, and the display area can be bent to the extreme bottom black edge , But the rigid AMOLED display (using glass as the base material) cannot be bent to achieve the extreme black edges, and thus cannot further increase the screen-to-body ratio.

Summary of the invention

The present disclosure provides a display module and an electronic device to solve the problem of a relatively low screen occupancy caused by a large lower black border of the display module.

In order to solve the above technical problems, the present disclosure is implemented as follows:

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

The second substrate includes 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 a flexible circuit board, the A touch circuit is arranged on the second surface, and the flexible circuit board is connected to the touch circuit;

At least one gap connecting the first surface and the second surface is provided on at least one side surface of the second substrate, and the flexible circuit board on the first surface passes through a conductive connection portion provided in the gap, It is electrically connected with the flexible circuit board on the second surface.

In the second aspect, the embodiments of the present disclosure also provide an electronic device including the display module as described above.

In the embodiment of the present disclosure, a flexible circuit board is provided on both the first surface and the second surface of the second substrate, the second surface is provided with a touch circuit, and the flexible circuit board is connected to the The touch circuit is connected, and at least one gap connecting the first surface and the second surface is provided on at least one side surface of the second substrate, and the flexible circuit board on the first surface is arranged on the The conductive connection part in the gap is electrically connected to the flexible circuit board on the second surface, and FOG binding does not need to occupy the lower edge of the second substrate, which can reduce the lower black edge of the display module and improve the display module Screen-to-body ratio.

Description of the drawings

In order to explain the technical solutions of the embodiments of the present disclosure more clearly, the following will briefly introduce the drawings that need to be used in the description of the embodiments of the present disclosure. Obviously, the drawings in the following description are only some embodiments of the present disclosure. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative labor.

FIG. 1 shows one of the structural schematic diagrams of the display module of the embodiment of the present disclosure;

FIG. 2 shows the second structural diagram of the display module of the embodiment of the present disclosure;

FIG. 3 shows a schematic diagram of a conductive connection part in the gap of an embodiment of the present disclosure;

Reference signs:

1-cover plate, 2-polarizer, 3-first substrate, 4-second substrate, 41-touch flexible circuit board, 42-main flexible circuit board, 421-connector, 43-integrated circuit chip, 5- Conductive connection part, 6-optical adhesive, 7-anisotropic conductive adhesive film.

Detailed ways

The technical solutions in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, rather than all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present disclosure.

At present, COF and panel glass are generally bound on the lower end surface of the lower glass, and T-FPC and panel glass are bound on the lower end surface of the upper glass, resulting in a larger black border under the display module and a lower screen occupancy. Therefore, the embodiments of the present disclosure provide a display module and an electronic device. The FOG of the COF structure and the FOG of the T-FPC in the related art are designed to change the binding position, and the touch trace of the upper glass substrate is made down On the outer surface of the glass substrate, bind the T-FPC to the bottom of the outer surface of the lower glass substrate, and at the same time wind the traces of the FOG bonding area of the Low Temperature Poly-Silicon (LTPS) layer of the lower glass substrate to the bottom On the outer surface of the glass substrate, COF is bound to the outer surface of the lower glass substrate, so that FOG binding does not occupy the lower edge of the surface glass, and the black border under the display module is further reduced to be as narrow as the other sides, realizing four sides Narrow frame full screen, increase the screen-to-body ratio.

Specifically, as shown in FIGS. 1 to 3, an embodiment of the present disclosure provides a display module, including: a cover plate 1, a polarizer 2, a first substrate 3, and a second substrate 4 stacked in sequence, wherein:

The second substrate 4 includes a first surface facing the first substrate 3 and a second surface opposite to the first surface, and both the first surface and the second surface are provided with a flexible circuit board, A touch circuit is arranged on the second surface, and the flexible circuit board is connected to the touch circuit;

At least one gap connecting the first surface and the second surface is provided on at least one side surface of the second substrate 4, and the flexible circuit board on the first surface passes through a conductive connection portion provided in the gap. 5. Electrically connect with the flexible circuit board on the second surface.

Optionally, as shown in FIG. 2, the polarizer 2 and the cover plate 1 may be connected by optically clear adhesive (OCA) 6.

Optionally, the main flexible circuit board (Main-FPC, M-FPC) 42 on the second surface and the second substrate 4 may be connected by an anisotropic conductive film (ACF) 7.

Wherein, the setting method of the touch circuit is a method of glass etching the touch circuit. The touch circuit may include a plurality of conductive lines that cross each other, a plurality of irregularly shaped polygonal grids formed by a plurality of conductive lines intersecting each other, and a plurality of nodes respectively located at the intersections of the plurality of conductive lines, Each node is a hollow ring structure. The form of the touch circuit is not limited.

In the above-mentioned embodiments of the present disclosure, by providing a 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 connection portion, and the flexible circuit The board is connected to the touch circuit, and at least one gap connecting the first surface and the second surface is provided on at least one side surface of the second substrate 4. The flexible circuit board is electrically connected to the flexible circuit board on the second surface through the conductive connection portion 5 provided in the gap, and FOG binding does not need to occupy the lower edge of the second substrate 4, which can reduce the display module The lower black border of the display module increases the screen-to-body ratio of the display module.

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

The main flexible circuit board 42 is arranged on the first surface and the second surface, and the main flexible circuit board 42 on the first surface is connected to the second surface through the conductive connection part 5 arranged in the gap. On the main flexible circuit board 42 is connected.

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

A touch flexible circuit board 41 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 .

Wherein, 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 connection portion 5 provided in the gap, and the touch flexible circuit board 41 Connected to the touch circuit, the touch flexible circuit board 41 is electrically connected to the main flexible circuit board 42 on the second surface to form a path.

The edges and corners on the groove wall of the gap may be rounded. Wherein, the gap and the method for setting the conductive connecting portion 5 in the gap may be:

Dig out the side of the second substrate 4 by digging through holes or gaps on the second substrate 4 (ie the lower glass substrate). Each hole or groove represents a pin trace. The diameter of the hole (the width of the bound pin) can be According to the size and width of the second substrate 4, it can be generally 30um, and the distance between the holes can be 10um. The through hole or gap can be realized by laser digging. While digging the hole, the edges on both sides of the second substrate 4 are also laser-engraved into rounded corners so that the metal trace arc transitions to the side and back. The wiring plays a protective role; after the second substrate 4 has a through hole, the conductive connection part (such as a conductive circuit) is coated. Generally, the conductive circuit material can be molybdenum Mo, aluminum Al, titanium Ti, etc., and can be a single-layer metal material , Or multi-layer metal materials, such as molybdenum aluminum molybdenum MoAlMo, the conductive circuit layer is plated into the first surface, second surface and side through holes of the second substrate 4 by vacuum sputtering and other coating methods, and then exposed and etched The film is removed to obtain a conductive circuit pattern. The thickness of the trace metal layer can be 1 nm to 999 nm, and optionally can be 350 nm.

Among them, the second substrate 4 completes the arrangement of the flexible circuit board, the touch circuit and the conductive circuit in the gap, and the second substrate 4 (lower glass substrate) is bonded to the first substrate 3 (upper glass substrate) along the first The first substrate 3 and the second substrate 4 are cut at the hollow position of the second substrate 4 to obtain the first substrate 3 and the second substrate 4 after cutting, so that the first substrate 3 and the second substrate 4 are flush with each other. 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 connection portion 5 provided in the gap, which reduces the area of the lower black border and increases the screen-to-body ratio .

Optionally, an integrated circuit chip 43 is further provided 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.

Wherein, the touch flexible circuit board 41 and the integrated circuit chip 43 are both bound on the second surface of the second substrate 4, and the lengths of the first substrate 3 and the second substrate 4 are the same (that is, the upper glass substrate and the The lower glass substrate is flush), which not only reduces the bending radius of the touch flexible circuit board 41 in the related technology, but also reduces the area of the black border under the display module, and also increases the reliability of the module (that is, the reduction of the flexible circuit board The tensile stress of the upper glass substrate and the lower glass substrate).

Optionally, the main flexible circuit board 42 is further provided with a connector 421 that is connected to a power source, and the main flexible circuit board 42 and the touch flexible circuit board 41 are connected to the power source 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 and the like.

In the above-mentioned embodiments of the present disclosure, by providing a 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 connection portion, and the flexible circuit The board is connected to the touch conductive connection part, and at least one gap connecting the first surface and the second surface is provided on at least one side surface of the second substrate 4. The flexible circuit board is electrically connected to the flexible circuit board on the second surface through the conductive connection portion 5 provided in the gap, and FOG binding does not need to occupy the lower edge of the second substrate 4, which can reduce The lower black border of the small display module increases the area of the display area, reduces the distance from the edge of the second substrate 4 to the edge of the cover plate 1, and increases the screen-to-body ratio of the display module.

An embodiment of the present disclosure also provides an electronic device including the display module as described in any of the above embodiments.

The above-mentioned specific embodiments describe in detail an electronic device provided by the present disclosure. For the convenience of description, the mobile phone is used as a specific example of the electronic device of the present disclosure. Those skilled in the art can understand that in addition to the mobile phone as an electronic device, it can also be applied to other electronic devices with display modules, such as tablet computers and electronic devices. Book readers, moving picture experts compress standard audio layer 3 (Moving Picture Experts Group Audio Layer III, MP3) players, moving picture experts compress standard audio layer 4 (Moving Picture Experts Group Audio Layer IV, MP4) players, laptops Type portable computers, vehicle-mounted computers, desktop computers, set-top boxes, smart TVs, wearable devices, etc., are all within the protection scope of the embodiments of the present disclosure.

In the above-mentioned embodiments of the present disclosure, by providing a 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 connection portion, and the flexible circuit The board is connected to the touch conductive connection part, and at least one gap connecting the first surface and the second surface is provided on at least one side surface of the second substrate 4. The flexible circuit board is electrically connected to the flexible circuit board on the second surface through the conductive connection portion 5 provided in the gap, and FOG binding does not need to occupy the lower edge of the second substrate 4, which can reduce The lower black border of the small display module increases the area of the display area, reduces the distance from the edge of the second substrate 4 to the edge of the cover plate 1 (ie, H in FIG. 1), and increases the screen-to-body ratio of the display module.

The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same or similar parts between the various embodiments can be referred to each other.

Although the optional embodiments of the embodiments of the present disclosure have been described, those skilled in the art can make additional changes and modifications to these embodiments once they learn the basic creative concept. Therefore, the appended claims are intended to be interpreted as including alternative embodiments and all changes and modifications falling within the scope of the embodiments of the present disclosure.

Finally, it should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply these entities. Or there is any such actual relationship or sequence between operations. Moreover, the terms "including", "including" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or terminal device including a series of elements not only includes those elements, but also includes those that are not explicitly listed Other elements listed, or also include elements inherent to this process, method, article, or terminal device. If there are no more restrictions, the element defined by the sentence "including a..." does not exclude the existence of other identical elements in the process, method, article or terminal device that includes the element.

The above are optional implementations of the present disclosure. It should be pointed out that for those of ordinary skill in the art, several improvements and modifications can be made without departing from the principles described in the present disclosure, and these improvements and modifications are also Within the protection scope of the present disclosure.

Claims

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

The second substrate (4) includes a first surface facing the first substrate (3) and a second surface opposite to the first surface, and both the first surface and the second surface are provided with A flexible circuit board, a touch circuit is arranged on the second surface, and the flexible circuit board is connected to the touch circuit;

At least one gap connecting the first surface and the second surface is provided on at least one side surface of the second substrate (4), and the flexible circuit board on the first surface passes through the conductive gap provided in the gap. The connecting portion (5) is electrically connected with the flexible circuit board on the second surface.
The display module of claim 1, wherein the flexible circuit board comprises:

The main flexible circuit board (42) arranged on the first surface and the second surface, the main flexible circuit board (42) on the first surface passes through the conductive connection portion (5) arranged in the gap It is connected with the main flexible circuit board (42) on the second surface.
3. The display module of claim 2, wherein the flexible circuit board further comprises:

A touch flexible circuit board (41) arranged on the second surface, the touch flexible circuit board (41) is connected to the touch circuit, and the touch flexible circuit board (41) is connected to the main The flexible circuit board (42) is electrically connected.
The display module according to claim 2, wherein an integrated circuit chip (43) is further provided on the second surface of the second substrate (4), and the integrated circuit chip (43) is fixed to the On the main flexible circuit board (42) on the second surface.
The display module according to claim 2, wherein the main flexible circuit board (42) is further provided with a connector (421) connected to a power source.
The display module according to claim 1, wherein the polarizer (2) and the cover plate (1) are connected by optical glue (6).
The display module of claim 1, wherein the corners on the groove wall of the gap are rounded.
The display module according to claim 2, wherein the main flexible circuit board (42) of the second surface and the second substrate (4) are connected by an anisotropic conductive adhesive film (7).
An electronic device comprising the display module according to any one of claims 1 to 8.
The electronic equipment according to claim 9, including: mobile phones, tablet computers, e-book readers, MP3 players, MP4 players, laptop portable computers, car computers, desktop computers, set-top boxes, smart TVs, wearables At least one item in the device.