WO2022161344A1

WO2022161344A1 - Electronic device and display module

Info

Publication number: WO2022161344A1
Application number: PCT/CN2022/073716
Authority: WO
Inventors: 段进才; 杨浩
Original assignee: 维沃移动通信有限公司
Priority date: 2021-01-28
Filing date: 2022-01-25
Publication date: 2022-08-04
Also published as: CN112817482A; CN112817482B

Abstract

Disclosed are an electronic device and a display module. The display module comprises an NFC module and a display screen, wherein the NFC module comprises an NFC coil and an NFC ferrite, and the display screen comprises a cover plate, a polarizing layer and an insulating layer. The insulating layer and the cover plate are sequentially stacked on the polarizing layer. The NFC coil is disposed on the surface of the polarizing layer facing the cover plate, and the NFC coil is located inside the insulating layer. The NFC ferrite is disposed on the side of the polarizing layer away from the cover plate.

Description

Electronic equipment and display modules

cross reference

The present invention claims the priority of a Chinese patent application with an application number of 202110118240.1 and an invention title of "Electronic Equipment and Display Module" submitted to the China Patent Office on January 28, 2021, the entire contents of which are incorporated herein by reference middle.

technical field

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

Background technique

With the improvement of user demands, there are more and more functional modules configured by electronic devices. These functional modules can make the electronic device have more and more functions, and then can meet more usage demands of users.

In the related art, the electronic device is configured with an NFC (Near Field Communication, short-range wireless communication) module. The NFC module enables the electronic device to have a short-range wireless communication function. In this case, electronic devices can be used for payment, motion monitoring, access control, etc. Obviously, this can further expand the application scenarios of electronic devices.

In the related art, the electronic device is equipped with a display module, and the NFC module is attached to the back of the display module (ie, the surface opposite to the display surface of the display module), thereby realizing the stacked installation of the NFC module and the display module. However, such an assembly structure will lead to a larger thickness of the electronic device, and thus cannot meet the requirement of developing the electronic device in a thinner direction.

SUMMARY OF THE INVENTION

The purpose of the embodiment of the present application is to provide an electronic device and a display module, which can solve the problem that the thickness of the current display module is relatively thick.

In order to solve the above technical problems, this application is implemented as follows:

In a first aspect, the present invention discloses a display module, including an NFC module and a display screen;

Wherein, the NFC module includes an NFC coil and an NFC ferrite;

The display screen includes a cover plate, a polarizing layer and an insulating layer, the insulating layer and the cover plate are sequentially stacked on the polarizing layer, and the NFC coil is arranged on the side of the polarizing layer facing the cover plate and the NFC coil is located in the insulating layer, and the NFC ferrite is arranged on the side of the polarizing layer facing away from the cover plate.

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

Compared with the prior art, the display module disclosed in the embodiment of the present application integrates an NFC module. Specifically, an insulating layer is stacked on the side of the polarizing layer facing the display direction of the display screen, and the NFC coil is deposited on the polarizing layer facing the display screen. The surface on one side of the display direction is located in the insulating layer. The NFC coil set up in this way effectively utilizes the space in the insulating layer and does not increase the thickness of the display module. At the same time, the NFC coil deposited on the surface of the polarizing layer will not The structure of the polarizing layer has an influence, so that the display stability of the display module is good.

Description of drawings

1 is a schematic diagram of a display module disclosed in an embodiment of the present application;

FIG. 2 is a schematic cross-sectional view of A-A of FIG. 1 in the display module disclosed in the embodiment of the present application.

Description of reference numbers:

100-NFC module, 110-NFC coil, 111-First coil end, 112-Second coil end, 120-NFC ferrite,

200-display screen, 210-cover plate, 211-transparent adhesive, 220-polarizing layer, 220a-end outer edge, 220b-first electrode sheet, 220c-second electrode sheet, 230-insulating layer, 240- Substrate layer, 250-protective layer, 260-touch layer, 270-encapsulation layer,

200a - display area, 200b - non-display area,

300 - Flexible Electrical Connector,

400 - Bridge traces,

500 - buffer layer,

600-Connect glue.

Detailed ways

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

The terms "first", "second" and the like in the description and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It is to be understood that the data so used are interchangeable under appropriate circumstances so that the embodiments of the present application can be practiced in sequences other than those illustrated or described herein, and distinguish between "first", "second", etc. The objects are usually of one type, and the number of objects is not limited. For example, the first object may be one or more than one. In addition, "and/or" in the description and claims indicates at least one of the connected objects, and the character "/" generally indicates that the associated objects are in an "or" relationship.

The technical solutions disclosed in the embodiments of the present application will be described in detail below with reference to the accompanying drawings.

Referring to FIGS. 1 to 2 , an embodiment of the present application discloses a display module, which includes an NFC module 100 and a display screen 200 , and the display module can be applied to an electronic device.

The NFC module 100 can provide NFC functions for the electronic device, and the NFC module 100 can enable the electronic device to have near field communication functions such as payment, simulated access control, contact passing, browsing, and linking. The display screen 200 is used to display images.

The display screen 200 includes a cover plate 210, a polarizing layer 220 and an insulating layer 230. The insulating layer 230 and the cover plate 210 are sequentially stacked on the polarizing layer 220. Specifically, the cover plate 210, the insulating layer 230 and the polarizing layer 220 are formed along the The thickness directions are stacked one after the other.

The NFC module 100 includes the NFC coil 110 and the NFC ferrite 120, wherein the NFC coil 110 is disposed on the side of the polarizing layer 220 facing the cover plate 210, and the NFC coil 110 is disposed on the surface of the polarizing layer 220, because the polarizing layer 220 is disposed The side with the NFC coil 110 is stacked with the insulating layer 230. The NFC coil 110 is located in the insulating layer 230. The insulating layer 230 can protect the NFC coil 110 and the polarizing layer 220 to prevent the NFC coil 110 from being short-circuited. 110 is stacked on the surface of the polarizing layer 220, and the structure of the polarizing layer 220 will not be changed for this purpose. For example, it is not necessary to open a groove for accommodating the NFC coil 110 on the polarizing layer 220, thereby ensuring the structure of the polarizing layer 220. Integrity and stability, while reducing the processing difficulty of the polarizing layer 220 .

The NFC ferrite 120 is disposed on the side of the polarizing layer 220 that faces away from the insulating layer 230 . Generally, the NFC ferrite 120 is made of a material with high magnetic permeability, and the NFC ferrite 120 can play the role of focusing magnetic flux , by increasing the magnetic field strength in the display module, the sensing distance of the NFC coil 110 is effectively increased, so that the display module has better NFC sensing performance. In an optional solution, the NFC ferrite 120 may be disposed on the back of the display screen 200 .

In the display module disclosed in the embodiment of the present application, the NFC coil 110 is disposed on the polarizing layer 220, and the NFC coil 110 is located in the insulating layer 230. The NFC coil 110 effectively utilizes the inner space of the insulating layer 230 and does not The additional thickness of the display module is beneficial to the thinning of the display module, and further, the thinning of the electronic device using the display module is beneficial. At the same time, there is no need to open a groove for accommodating the NFC coil 110 on the polarizing layer 220 to reduce the thickness of the display module, which ensures the structural stability and integrity of the polarizing layer 220, and also reduces the difficulty of processing the polarizing layer 220. . The NFC ferrite 120 is disposed on the side of the polarizing layer 220 facing away from the insulating layer 230 , and there is a certain distance between the NFC ferrite 120 and the NFC coil 110 to ensure a sufficient near field communication distance therebetween.

Optionally, when arranging the NFC coil 110, the NFC coil 110 may be deposited on the surface of the polarizing layer 220 facing the display direction of the display screen 200 first, and then the insulating layer 230 may be deposited on the polarizing layer 220. The insulating layer 230 wraps the NFC coil 110 inside, which further reduces the technological difficulty of the display module.

In order to form a complete structure of the display screen 200 , a substrate layer 240 is stacked on the side of the polarizing layer 220 that faces away from the insulating layer 230 , and the cover plate 210 , the insulating layer 230 , the polarizing layer 220 and the substrate layer 240 are in the thickness direction of the four of them. Stacked in sequence, the cover plate 210 can protect the display module, the polarizing layer 220 can play the role of polarizing light, and the cover plate 210 and the insulating layer 230 can be connected by a light-transmitting adhesive 211 . The substrate layer 240 is the basic component of the display screen 200 , and the substrate layer 240 can carry various components for mounting the display screen 200 . The layer 240 can be a glass substrate, so it can transmit light. The substrate layer 240 typically includes a superimposed upper and lower glass layer. Optionally, the light-transmitting connecting adhesive 211 may be an OCA (Optically Clear Adhesive, optical adhesive) adhesive layer.

Optionally, the above-mentioned NFC coil 110 may also be disposed on one side of the cover plate 210, the side of the polarizing layer 220 facing away from the cover plate 210, or the opposite sides of the substrate layer 240 in the thickness direction thereof. When the coil 110 is disposed on the cover plate 210 , it can be disposed on the side of the cover plate 210 that faces away from the display direction of the display screen 200 . On the other hand, the insulating layer 230 also plays the role of protecting the NFC coil 110 . When the NFC coil 110 is disposed on the substrate layer 240, it can be disposed on the side of the substrate layer 240 facing away from the display direction of the display screen 200, or on the side of the substrate layer 240 facing the display direction of the display screen 200. Correspondingly, According to the specific position of the NFC coil 110 , the insulating layer 230 is selectively disposed on the side of the substrate layer 240 facing away from the display direction of the display screen 200 or facing the display direction of the display screen 200 , and the insulating layer 230 should also cover the NFC coil 110 .

When the NFC coil 110 is disposed on the substrate layer 240 or the cover plate 210 , the NFC coil 110 can also be disposed by means of deposition. Correspondingly, the insulating layer 230 is also deposited on the surface of the cover plate 210 or the substrate layer 240 by means of deposition. .

It should be noted that a backlight assembly is usually provided on the side of the substrate layer 240 facing away from the display direction of the display screen 200 .

Optionally, the display screen 200 includes a display area 200a and a non-display area 200b, wherein the non-display area 200b is arranged around the display area 200a, the display area 200a can display image information, and the non-display area 200b serves as the boundary of the display screen 200, It plays the role of protecting the display area 200a. Correspondingly, the display area 200a has a corresponding projection position on the polarizing layer 220, which is a display projection, and the non-display area 200b also has a corresponding projection position on the polarizing layer 220, and the projection position is a non-display projection, which is a non-display projection. The projection will also be set around the display projection.

In order to make the induction performance of the NFC module 100 stronger, the NFC coil 110 can be arranged in multiple circles, and in order to reduce the influence of the NFC coil 110 on the display effect of the display screen 200 , the multi-circle NFC coil 110 should extend at the edge of the display screen 200 Specifically, a part of the NFC coil 110 is located in the non-display area 200b of the display screen 200, corresponding to the non-display projection area on the polarizing layer 220, and another part of the NFC coil 110 is located in the display area 200a of the display screen 200, and is the display area 200a The position close to the non-display area 200b corresponds to the position on the polarizing layer 220 where the display projection is close to the non-display projection, so that the NFC coil 110 can be arranged in multiple circles while reducing the influence of the NFC coil 110 on the display effect of the display screen 200. At the same time, the screen flicker problem of the display screen 200 caused by the NFC coil 110 being too close to the center of the display screen 200 can also be alleviated

It should be noted that, in order not to increase the thickness of the display module on the premise of ensuring good inductive performance of the NFC coil 110, each circle of the NFC coil 110 arranged in multiple turns should be arranged on the same layer to avoid stacking of the NFC coil 110. .

Optionally, since part of the NFC coil 110 enters the display area 200a of the display screen 200, in order to reduce the influence of this part of the NFC coil 110 on the display effect of the display area 200a, the NFC coil 110 can use transparent wiring, transparent wiring. The NFC coil 110 without any influence will not affect the display image of the display area 200a, thereby helping to increase the screen ratio of the display screen 200. Specifically, the material of the NFC coil 110 with transparent wiring can be indium tin oxide, TiAlTi or nano-silver, etc. When indium tin oxide and TiAlTi are used as the NFC coil 110, the NFC coil 110 is usually deposited by magnetron sputtering On the polarizing layer 220, when nano-silver is used as the NFC coil 110, the NFC coil 110 is usually deposited on the polarizing layer 220 by a solution coating method. The thickness of the display module is further reduced, and correspondingly, the thickness of the insulating layer 230 can also be further reduced, thereby further reducing the overall thickness of the display module.

The above-mentioned magnetron sputtering and solution coating methods are known technologies in the field of semiconductor technology, and will not be repeated in this application.

Optionally, the NFC coil 110 includes a first coil end 111 adjacent to the center of the display screen 200 and a second coil end 112 adjacent to the edge of the display screen 200, so there is a certain distance between the first coil end 111 and the second coil end 112. When the NFC coil 110 is arranged in multiple circles, the above-mentioned distance will be further increased. In order to enable the NFC coil 110 to communicate with the main board of the electronic device, the display module of the embodiment of the present application may further include a flexible electrical connector 300 , one end of the flexible electrical connector 300 is electrically connected to the NFC coil 110, and the other end is electrically connected to the main board of the electronic device. Specifically, the second coil end 112 of the NFC coil 110 can be directly electrically connected to one end of the flexible electrical connector 300 because it is adjacent to the edge of the display screen 200 , while the first coil end 111 of the NFC coil 110 is connected to the display screen 200 directly. The edges of the coils have a certain distance, so the first coil end 111 is electrically connected to one end of the flexible electrical connector 300 through the bridging trace 400 . The flexible electrical connector 300 may be a flexible circuit board.

When the NFC coil 110 is arranged in multiple turns, the bridging wire 400 will cross over part of the NFC coil 110. In order to avoid the short circuit caused by direct contact between the bridging wire 400 and part of the NFC coil 110, the surface of the bridging wire 400 can be covered with an insulating material . As the number of turns of the NFC coil 110 increases, the distance between the first coil end 111 and the edge of the display screen 200 will increase. Correspondingly, the length of the bridge wiring 400 should also increase. For the specific number of turns of the NFC coil 110 and The length of the bridge wiring 400 is not limited in this application.

Optionally, the above-mentioned display screen 200 further includes a protective layer 250 , and the protective layer 250 is stacked on the side of the insulating layer 230 facing away from the polarizing layer 220 . After the above-mentioned bridging trace 400 is drawn out from the second coil end 112 of the NFC coil 110 , the bridging trace 400 will pass through the insulating layer 230 . Since the protective layer 250 is stacked on the insulating layer 230 , the first part of the bridging trace 400 is In the insulating layer 230, the second part is in the protective layer 250, the protective layer 250 encapsulates the insulating layer 230 and the bridge wiring 400, and the protective layer 250 can serve the purpose of encapsulating the insulating layer 230 and the bridging wiring 400, Water vapor and oxygen are prevented from corroding the NFC coil 110 and the bridge wiring 400 , so as to achieve the purpose of protecting the NFC coil 110 and the bridge wiring 400 . Specifically, the protective layer 250 can be encapsulated glass of organic photoresist type.

It is worth noting that after the bridge wire 400 is drawn out from the first coil end 111 of the NFC coil 110, its first part located in the insulating layer 230 should not be in contact with the NFC coil 110. Specifically, the first part is connected to the NFC coil 110. There is an insulating layer 230 between the coils 110 , and the insulating layer 230 separates the NFC coil 110 from the first portion of the bridge wire 400 to prevent the bridge wire 400 and the NFC coil 110 from being contacted and short-circuited.

Optionally, one end of the polarizing layer 220 has an end outer edge 220a, the insulating layer 230 forms a first projection on the polarizing layer 220, and the end outer edge 220a forms a second projection on the polarizing layer 220, the first projection and the second projection are formed on the polarizing layer 220. The projections are coplanar on the same layer, and the first projection is located on the side of the second projection. Therefore, the above-mentioned outer edge 220a of the end portion is the part where one end edge of the polarizing layer 220 extends to the side away from the center of the polarizing layer 220. The insulating layer 230 is not stacked.

A first electrode sheet 220b and a second electrode sheet 220c are fixedly connected to the surface of the outer edge 220a of the end portion facing the display direction of the display screen 200, and the outer edge 220a of the end portion provides a mounting basis for the first electrode sheet 220b and the second electrode sheet 220c, and further For easy installation, the first electrode sheet 220b and the second electrode sheet 220c are electrical connectors, and the NFC coil 110 is connected to the flexible electrical connector 300 through the first electrode sheet 220b and the second electrode sheet 220c. The electrode sheet 220c is provided with a connecting glue 600, so that the first electrode sheet 220b and the second electrode sheet 220c are connected to the flexible electrical connector 300, and then communicated with the main board of the electronic device.

The connecting glue 600 is more conducive to fixing the flexible electrical connector 300, thereby making the connection with the first electrode sheet 220b and the second electrode sheet 220c more stable. Bending at a larger angle, so as to protect the flexible electrical connector 300 .

Specifically, the first coil end 111 of the NFC coil 110 is connected to the first electrode sheet 220b through the bridging wire 400. Therefore, the end of the bridging wire 400 away from the first coil end 111 extends to the outer edge 220a of the end, and the NFC coil The second coil end 112 of the 110 is connected to the second electrode sheet 220c, and the flexible electrical connector 300 is connected to the first electrode sheet 220b and the second electrode sheet 220c at the same time, so the first electrode sheet 220b and the second electrode sheet 220c should be arranged close to each other , so that the flexible electrical connector 300 can be connected to both at the same time. Correspondingly, the distance between the first coil end 111 and the second coil end 112 should not be too large. Specifically, the first coil end 111 and the second coil end 112 are vertically The pitch of the projections on the surface of the display screen 200 should be set smaller, so that the length of the bridge wiring 400 can be reduced, so that the performance stability of the display module disclosed in the embodiments of the present application is better.

Optionally, the above-mentioned NFC coil 110, the first electrode sheet 220b and the second electrode sheet 220c are arranged on the same layer. Specifically, the above three can be arranged on the side of the polarizing layer 220 facing the display direction of the display screen 200, so that it can be The redundant arrangement of the NFC coil 110 is reduced, and the thickness of the display module disclosed in the embodiments of the present application is not additionally increased.

Optionally, a buffer layer 500 is stacked on the side of the above-mentioned display screen body facing away from the NFC coil 110 , the buffer layer 500 is arranged on the side of the polarizing layer 220 facing away from the insulating layer 230 , and the NFC ferrite 120 is stacked on the buffer layer. On the layer 500, and located on the side of the buffer layer 500 facing away from the NFC coil 110, the purpose of setting the buffer layer 500 is to protect the display screen 200. material. Generally, in a complete display module, the buffer layer 500 is disposed on the side of the substrate layer 240 facing away from the NFC coil 110 , so that the NFC ferrite 120 fixed on the buffer layer 500 and the NFC coil 110 can maintain a certain spacing.

Optionally, the display module disclosed in the embodiments of the present application may further be provided with a touch layer 260 and an encapsulation layer 270. Specifically, the touch layer 260 is stacked on the side of the polarizing layer 220 facing away from the cover plate 210. 260 can provide a touch function for the display module, the encapsulation layer 270 is stacked on the side of the substrate layer 240 facing the cover plate 210 , and the function of the encapsulation layer 270 is to encapsulate the substrate layer 240 .

Based on the above-mentioned display module, an embodiment of the present application further discloses an electronic device including the above-mentioned display module.

The electronic device disclosed in the embodiments of the present application may be a smart phone, a tablet computer, an e-book reader, or a wearable device. Of course, the electronic device may also be other devices, which are not limited in this embodiment of the present application.

The embodiments of the present application have been described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific embodiments, which are merely illustrative rather than restrictive. Under the inspiration of this application, without departing from the scope of protection of the purpose of this application and the claims, many forms can be made, which all fall within the protection of this application.

Claims

A display module, comprising: an NFC module (100) and a display screen (200);

Wherein, the NFC module (100) includes an NFC coil (110) and an NFC ferrite (120);

The display screen (200) includes a cover plate (210), a polarizing layer (220) and an insulating layer (230), and the insulating layer (230) and the cover plate (210) are sequentially stacked on the polarizing layer (230). 220), the NFC coil (110) is disposed on the surface of the polarizing layer (220) facing the cover plate (210) side, and the NFC coil (110) is located in the insulating layer (230) and the NFC ferrite (120) is arranged on the side of the polarizing layer (220) facing away from the cover plate (210).
The display module according to claim 1, wherein the display module further comprises a substrate layer (240), and the substrate layer (240) is stacked on the polarizing layer (220) facing away from the insulating layer ( 230) side.
The display module according to claim 1, wherein the NFC coil (110) extends along the edge of the display screen (200) and is arranged in multiple circles, and the display screen (200) includes a display area (200a) ) and a non-display area (200b), the non-display area (200b) is arranged around the display area (200a), a part of the NFC coil (110) is located in the display area (200a), the NFC coil ( Another part of 110) is located in the non-display area (200b).
The display module according to claim 1, wherein the NFC coil (110) is a transparent wire.
The display module of claim 1, wherein the NFC coil (110) comprises a first coil end (111) adjacent to the center of the display screen (200) and an edge adjacent to the display screen (200) The second coil end (112) of the display module, the display module further includes a flexible electrical connector (300), one end of the flexible electrical connector (300) is connected to the edge of the display screen (200), and is connected with all the flexible electrical connectors (300). The second coil end (112) is electrically connected, and the first coil end (111) is electrically connected to the flexible electrical connector (300) through a bridge wire (400).
The display module according to claim 5, wherein the display screen (200) further comprises a protective layer (250), and the protective layer (250) is stacked on the insulating layer (230) and faces away from the polarized light One side of the layer (220), the first part of the bridging wire (400) is arranged in the insulating layer (230), and the second part of the bridging wire (400) is arranged in the protective layer (250) )Inside.
The display module according to claim 5, wherein the polarizing layer (220) comprises an end outer edge (220a), and the insulating layer (230) forms a first projection on the polarizing layer (220), The outer edge (220a) of the end portion forms a second projection on the polarizing layer (220), the first projection and the second projection are coplanar, and the first projection is located at the position of the second projection On one side, a first electrode sheet (220b) and a second electrode sheet (220c) are fixed on the surface of the outer edge (220a) of the end portion facing the display direction of the display screen (200), and the flexible electrical connector ( One end of 300) is electrically connected to the first electrode sheet (220b) and the second electrode sheet (220c), and the first coil end (111) is connected to the first coil end (111) through the bridge wire (400) The electrode sheet (220b) is electrically connected, and the second coil end (112) is electrically connected with the second electrode sheet (220c).
The display module according to claim 7, wherein the NFC coil (110), the first electrode sheet (220b) and the second electrode sheet (220c) are arranged in the same layer.
The display module according to claim 2, wherein a buffer layer (500) is stacked on a side of the polarizing layer (220) facing away from the NFC coil (110), and the NFC ferrite (120) Overlaid on the buffer layer (500) and located on the side of the buffer layer (500) facing away from the NFC coil (110).
An electronic device, comprising the display module according to any one of claims 1 to 9.