CN112783372B

CN112783372B - Electronic device and display device

Info

Publication number: CN112783372B
Application number: CN202110121001.1A
Authority: CN
Inventors: 段进才; 赵宇晓
Original assignee: Vivo Mobile Communication Co Ltd
Current assignee: Vivo Mobile Communication Co Ltd
Priority date: 2021-01-28
Filing date: 2021-01-28
Publication date: 2023-04-18
Anticipated expiration: 2041-01-28
Also published as: WO2022161306A1; CN112783372A

Abstract

The embodiment of the application discloses a display device, including NFC module and display screen, the NFC module includes NFC coil and NFC ferrite, the display screen is including the circuit base plate layer that superposes in proper order, screen packaging layer and first insulation layer, the NFC coil sets up on the screen packaging layer, and be located within the first insulation layer, the NFC ferrite sets up the one side at the circuit base plate NFC coil dorsad, this kind of structure can realize in the NFC module embedding display screen, and then avoid occupying of NFC module to display device superpose space, and reduce display device thickness, do benefit to display device and develop to frivolousization, this application still discloses an electronic equipment.

Description

Electronic device and display device

Technical Field

The present disclosure relates to electronic devices, and particularly to an electronic device and a display device.

Background

With the increase of user requirements, more and more functional modules are configured on the electronic equipment. The functional modules can enable the electronic equipment to have more and more functions, and further can meet more use requirements of users.

In the related art, the electronic device is provided with a Near Field Communication (NFC) module. The NFC module enables the electronic equipment to have a near field communication function. In this case, the electronic device can be used for payment, motion monitoring, entrance guard opening and the like, and obviously, the application scene of the electronic device can be further widened.

In the related art, the electronic device is provided with the display module, and the NFC module is attached to the back surface of the display module (i.e., the surface opposite to the display surface of the display module), so that the NFC module and the display module can be mounted in an overlapping manner. However, the thickness of the electronic device is increased due to the assembly structure, and the demand for the thinner electronic device cannot be met.

Disclosure of Invention

The invention provides a display device, which aims to solve the problem of thickness increase caused by the fact that an NFC module occupies the overlapping space of the display device.

In one aspect, the present application discloses a display device, comprising an NFC module and a display screen, wherein: the NFC module comprises an NFC coil and an NFC ferrite; the display screen comprises a circuit substrate layer, a screen packaging layer and a first insulating layer which are sequentially overlapped, the NFC coil is arranged on the screen packaging layer and located in the first insulating layer, and the NFC ferrite is arranged on one side, back to the NFC coil, of the circuit substrate layer.

In another aspect, the present application discloses an electronic device including the display apparatus.

The invention has the following beneficial effects:

this application is optimized through the structure to display device, makes within the NFC coil sets up the first insulation layer, and then realizes in the NFC module embedding display screen to avoid the occupation of NFC module to display device superpose space, and reduce display device thickness, do benefit to display device and develop to frivolousization.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:

fig. 1 is a layout diagram of an NFC module in a display device according to an embodiment of the disclosure;

FIG. 2 is an enlarged view at I of FIG. 1 in accordance with an embodiment of the present invention;

FIG. 3 is a cross-sectional view taken along line M-M of FIG. 1 in accordance with an embodiment of the present invention.

Description of the reference numerals:

100-NFC module,

110-NFC coil, 111-first coil end, 112-second coil end,

120-NFC ferrite,

200-a display screen,

210-wiring substrate layer,

220-screen packaging layer, 221-end outer edge, 222-first electrode sheet, 223-second electrode sheet,

230-first insulating layer, 240-first protective layer, 200 a-display region, 200 b-non-display region,

300-a first flexible circuit board, 400-a bridging trace, 500-a colloid, and 600-an elastic buffer layer.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be described in detail and completely with reference to the following specific embodiments of the present application and the accompanying drawings. It should be apparent that the described embodiments are only a few embodiments of the present application, and not all 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.

As shown in fig. 3, the display device disclosed in the present application includes an NFC module 100 and a display screen 200, where: the NFC module 100 includes an NFC coil 110 and an NFC ferrite 120. The display screen 200 includes a wiring substrate layer 210, a screen encapsulation layer 220, and a first insulating layer 230, which are sequentially stacked. The NFC coil 110 is disposed on the screen packaging layer 220 and located within the first insulating layer 230, and the NFC ferrite 120 is disposed on a side of the circuit substrate layer 210 facing away from the NFC coil 110.

In the present application, the line substrate layer 210 is a layer where the wires of the display screen 200 are located, and is a main portion of a display screen, and a specific material of the line substrate layer 210 may be an LTPS layer (low temperature polysilicon layer), which has the advantages of ultra-thin thickness, light weight, and low power consumption, and meets the light and thin requirements of the display device of the present application. The screen packaging layer 220 may be a hard-screen packaging glass layer or a flexible-screen thin-film packaging layer, so as to package and protect the circuit substrate layer 210, thereby preventing wires and various deposited film layers on the circuit substrate layer 210 from being corroded by water and oxygen, and the two are core components of the display screen 200 capable of realizing a display function.

The NFC module 100 functions as an NFC function, and specifically, the NFC ferrite 120 focuses magnetic flux to effectively increase an induction distance by increasing magnetic field strength, and the NFC coil 110 is used for generating an NFC signal. This application makes NFC coil 110 need not to occupy the superpose space alone through within with NFC coil 110 embedding first insulating layer 230, and then avoids occupation of NFC module 100 to display screen 200 superpose space, can effectively reduce this application display device thickness, through experimental data statistics, adopts the design of this application NFC module 100 and display screen 200 adaptation, and display device's thickness attenuate is about 150 mu m, does benefit to display device and develops to frivolousization.

In the specific implementation process, the screen packaging layer 220 may be stacked on the circuit substrate layer 210 in a vapor deposition manner, then the NFC coil 110 may be attached and disposed on the screen packaging layer 220 in an evaporation manner, and then the first insulating layer 230 is stacked on the screen packaging layer 220 in a vapor deposition manner, so that the NFC coil 110 is located in the first insulating layer 230, thereby implementing the assembly of the display device of the present application. The specific material of the NFC coil 110 may be transparent ITO, nano silver, tiAlTi, or the like, and as an alternative process, the ITO and TiAlTi may be disposed on the screen encapsulation layer 220 by adopting a magnetron sputtering method, and the nano silver may be disposed on the screen encapsulation layer 220 by adopting a liquid coating method.

In a more specific embodiment, as shown in fig. 1 and fig. 3, the NFC coil 110 extends along an edge of the display screen 200 and is disposed in multiple turns, the display screen 200 includes a display area 200a and a non-display area 200b, the non-display area 200b is disposed around the display area 200a, a portion of the NFC coil 110 is located in the display area 200a, and another portion of the NFC coil 110 is located in the non-display area 200b, such a layout manner can effectively prevent the NFC coil 110 from entering the center of the display area 200a to reduce the screen occupation ratio, and a regular routing manner is also beneficial to avoiding the problem of card reading and screen flashing.

More specifically, NFC coil 110 is transparent and walks the line to further improve the screen and account for the ratio, NFC coil 110 adopts the coating by vaporization technology can adjust transparent metal composition proportion in a flexible way simultaneously, with the different work scenes of adaptation.

In some embodiments, as shown in fig. 1 and 2, the NFC coil 110 includes a first coil end 111 adjacent to a center of the display screen 200 and a second coil end 112 adjacent to an edge of the display screen 200. The display device further includes a first flexible circuit board 300.

The first end of the first flexible circuit board 300 is connected to the edge of the display screen 200, meanwhile, the first flexible circuit board 300 is electrically connected to the second coil end 112, and the first coil end 111 is electrically connected to the first flexible circuit board 300 through the bridging trace 400.

The first flexible circuit board 300 may be designed to transmit the NFC signal generated by the NFC module 100 to an external chip to complete signal transmission. Wherein the first flexible circuit board 300 is disposed at the edge of the display screen 200, and the bridging wire 400 is matched to communicate with the layout of the first coil end 111 and the second coil end 112, so as to ensure that the first flexible circuit board 300 is away from the center of the display screen 200 while effectively transmitting the NFC signal, thereby avoiding interference with the operation of the display screen 200.

Further, as shown in fig. 3, the display panel 200 further includes a first protection layer 240, where the first protection layer 240 is stacked on the first insulation layer 230, specifically, on a side of the first insulation layer 230 opposite to the screen encapsulation layer 220. The first portion of the bridge trace 400 is disposed in the first insulating layer 230, and the second portion of the bridge trace 400 is disposed in the first protective layer 240.

The first protection layer 240 may be made of different materials according to different specific working scenarios, for example, when the touch control mode of the display panel 200 is an in-cell type, the touch control traces of the display panel 200 are integrated between the circuit substrate layer 210 and the screen encapsulation layer 220, at this time, the first protection layer 240 may be set as an organic photoresist layer to prevent water-oxygen corrosion, and the first protection layer 240 in a specific process embodiment may be stacked on the first insulation layer 230 by a spin coating method. When the touch mode of the display screen 200 is an oncell hard screen embedded touch mode, the touch traces of the display screen 200 are located above the first insulating layer 230, and at this time, the first protection layer 240 may be made of the same material as the first insulating layer 230 to provide insulation protection and prevent short circuit.

The bridging wire 400 is partially located in the first insulating layer 230, so that the first coil end 111 can be connected while the first insulating layer 230 keeps a gap with other parts of the NFC coil 110, and the first insulating layer 230 can prevent a short circuit between the bridging wire 400 and the NFC coil 110; the first portion of the bridging trace 400 is disposed in the first insulating layer 230, and the second portion of the bridging trace 400 is disposed in the first protective layer 240, so as to be embedded between the first insulating layer 230 and the first protective layer 240, thereby preventing the bridging trace 400 from occupying the overlapping space of the display screen 200, and further thinning the display device.

Furthermore, the NFC coil 110 may be a spiral line disposed at the edge of the display screen 200, and is integrally attached to the screen packaging layer 220 in a square or rectangular shape, and is formed by surrounding the display area 200a to the non-display area 200b one by one, so that the first coil end 111 and the second coil end 112 are both disposed on the screen packaging layer 220, that is, are located on the same thickness of the display screen 200 in the stacking direction, so as to reduce the thickness of the NFC coil 110 in the stacking direction of the display screen 200 as much as possible, and the reduction effect of the display device is better by matching with the connection mode of the bridging wire 400.

Meanwhile, as a specific process means, the bridging wire 400 may be disposed on the display screen 200 in a magnetron sputtering manner, which is also beneficial to reducing the occupation of the bridging wire 400 on the stacking space.

More specifically, as shown in fig. 1-3, the screen encapsulation layer 220 includes end outer edges 221. The first insulating layer 230 forms a first projection on the screen packaging layer 220, and the end portion outer edge 221 forms a second projection on the screen packaging layer 220, wherein the first projection and the second projection are coplanar and located on one side of the second projection.

A first electrode sheet 222 and a second electrode sheet 223 are fixed on the surface of the outer edge 221 of the end portion facing the display direction of the display screen 200, a first end of the first flexible circuit board 300 is electrically connected with the first electrode sheet 222 and the second electrode sheet 223, the first coil end 111 is electrically connected with the first electrode sheet 222 through a bridging wire 400, and the second coil end 112 is electrically connected with the second electrode sheet 223. The second end of the first flexible circuit board 300 is used for electrical connection with a main board of the electronic device.

In this way, the first electrode sheet 222 and the second electrode sheet 223 can be fully exposed through the arrangement of the end outer edge 221, so that the connection between the NFC coil 110 and the first flexible circuit board 300 is facilitated, and the signal generated by the NFC coil 110 is more favorably transmitted to the first flexible circuit board 300 by using the first electrode sheet 222 and the second electrode sheet 223 as intermediate transmission media.

The first electrode sheet 222 and the second electrode sheet 223 may be made of ITO, nano silver, tiAlTi, or the like, and may be disposed on the surface of the screen packaging layer 220 by vapor deposition.

Furthermore, as shown in fig. 3, the first end of the first flexible circuit board 300 is fixed to the first electrode plate 222 and the second electrode plate 223 in an overlapping manner, and a colloid 500 is disposed between the end surfaces of the first electrode plate 222 and the second electrode plate 223 and the first flexible circuit board 300 to ensure that the connection is more stable, and meanwhile, the colloid 500 can prevent the first end of the first flexible circuit board 300 from being bent at a larger angle, so as to protect the first flexible circuit board 300. The glue 500 may be a standing glue as an adhesive.

Furthermore, the NFC coil 110, the first electrode sheet 222 and the second electrode sheet 223 are disposed on the same layer, for example, on the surface of the screen packaging layer 220 and are located in the first insulating layer 230, so as to improve the space utilization ratio and further avoid occupying the stacking space of the display screen 200.

In some embodiments, as shown in fig. 1, the side of the circuit substrate layer 210 facing away from the NFC coil 110 is stacked with the elastic buffer layer 600, and the NFC ferrite 120 is stacked on the elastic buffer layer 600 and located on the side of the elastic buffer layer 600 facing away from the NFC coil 110. The design of elastic buffer layer 600 here can play the cushioning effect to avoid circuit base plate layer 210 to receive the damage of colliding with, the design of elastic buffer layer 600 simultaneously can also increase the magnetic induction distance between NFC coil 110 and the NFC ferrite 120, in order to strengthen transmission signal.

It should be further noted that the specific process of stacking the wiring substrate layer 210, the screen encapsulation layer 220, the first insulating layer 230 and the first protection layer 240 in sequence can be realized by vapor deposition.

Based on the display device disclosed by the embodiment of the application, the embodiment of the application discloses an electronic device, and the disclosed electronic device comprises the display device disclosed by the embodiment.

The electronic device disclosed in the embodiment of the application can be wearable devices such as a smart phone and a smart watch, and can also be other types of devices.

The above description is only an example of the present application and is not intended to limit the present application. Various modifications and changes may occur to those skilled in the art to which the present application pertains. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. A display device comprising an NFC module (100) and a display screen (200), wherein:

the NFC module (100) comprises an NFC coil (110) and an NFC ferrite (120);

the display screen (200) comprises a circuit substrate layer (210), a screen packaging layer (220) and a first insulating layer (230) which are sequentially stacked, wherein the circuit substrate layer (210) is a layer where wires of the display screen (200) are located, the circuit substrate layer (210) is a main body part of a display picture of the display screen (200), the screen packaging layer (220) is a packaging glass layer of a hard screen or a thin film packaging layer of a flexible screen, the NFC coil (110) is arranged on the screen packaging layer (220) and located in the first insulating layer (230), and the NFC ferrite (120) is arranged on one side, back to the NFC coil (110), of the circuit substrate layer (210);

the NFC coil (110) comprises a first coil end (111) adjacent to a center of the display screen (200) and a second coil end (112) adjacent to an edge of the display screen (200);

the screen packaging layer (220) comprises an end outer edge (221), the first insulating layer (230) forms a first projection on the screen packaging layer (220), the end outer edge (221) forms a second projection on the screen packaging layer (220), the first projection and the second projection are coplanar and are located on one side of the second projection, a first electrode plate (222) and a second electrode plate (223) are fixed on the surface of the end outer edge (221) facing the display direction of the display screen (200), and the NFC coil (110), the first electrode plate (222) and the second electrode plate (223) are arranged in the same layer;

the first coil end (111) is electrically connected with the first electrode sheet (222) through a bridging wire (400), the second coil end (112) is electrically connected with the second electrode sheet (223), the display screen (200) further comprises a first protective layer (240), the first protective layer (240) is superposed on the first insulating layer (230), a first part of the bridging wire (400) is arranged in the first insulating layer (230), a second part of the bridging wire (400) is arranged in the first protective layer (240),

the display device further comprises a first flexible circuit board (300), the first flexible circuit board (300) is arranged at the edge of the display screen (200), and the first end of the first flexible circuit board (300) is electrically connected with the first electrode plate (222) and the second electrode plate (223).

2. The display device according to claim 1, wherein the NFC coil (110) extends along an edge of the display screen (200) and is disposed in a plurality of turns, the display screen (200) includes a display region (200 a) and a non-display region (200 b), the non-display region (200 b) is disposed around the display region (200 a), a portion of the NFC coil (110) is located in the display region (200 a), and another portion of the NFC coil (110) is located in the non-display region (200 b).

3. The display device according to claim 1, wherein the NFC coil (110) is a transparent trace.

4. The display device according to claim 1, wherein a first end of the first flexible circuit board (300) is fixed to the first electrode sheet (222) and the second electrode sheet (223) in a lap joint manner, and a sealant (500) is provided between end faces of the first electrode sheet (222) and the second electrode sheet (223) and the first flexible circuit board (300).

5. The display device according to claim 1, wherein a side of the wiring substrate layer (210) facing away from the NFC coil (110) is stacked with an elastic buffer layer (600), and the NFC ferrite (120) is stacked on the elastic buffer layer (600) and located on a side of the elastic buffer layer (600) facing away from the NFC coil (110).

6. An electronic apparatus characterized by comprising the display device according to any one of claims 1 to 5.