CN112927614A

CN112927614A - Electronic device and display device

Info

Publication number: CN112927614A
Application number: CN202110120602.0A
Authority: CN
Inventors: 杨浩; 刘风
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: 2021-06-08
Anticipated expiration: 2041-01-28
Also published as: WO2022161333A1; CN112927614B

Abstract

The embodiment of the application discloses a display device, including NFC module and backlight unit, the NFC module includes NFC coil and NFC ferrite, backlight unit is including the diffusion layer and the first insulation layer of superpose in proper order, the NFC coil sets up on the diffusion layer and is located within the first insulation layer, the NFC ferrite sets up the one side at the diffusion layer dorsad NFC coil, this kind of structure can realize in the NFC module embedding backlight unit, and then avoid the occupation of NFC module to display device superpose space, and reduce display device thickness, do benefit to display device to frivolousization development, 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 for electronic equipment. The function modules can enable the functions of the electronic equipment to be more and more, 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 electronic device to be thinner 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 application discloses a display device, including NFC module and backlight unit, wherein: the NFC module comprises an NFC coil and an NFC ferrite; the backlight module comprises a diffusion layer and a first insulating layer which are sequentially overlapped, the NFC coil is arranged on the diffusion layer and located in the first insulating layer, and the NFC ferrite is arranged on one side, back to the NFC coil, of the diffusion layer.

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

The invention has the following beneficial effects:

this application optimizes through the structure to display device, makes the NFC coil setting on the diffusion layer and lie in within the first insulation layer, and then realizes in the NFC module embedding display device 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 frivolous, finally be favorable to electronic equipment to design towards thinner direction.

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;

FIG. 4 is a block diagram of a light source module layer according to an embodiment of the disclosure.

Description of reference numerals:

100-NFC module,

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

120-NFC ferrite, 121-convex ring,

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

210-a reflective layer,

220-light source component layer, 221-light guide layer, 222-light source, 223-reflector,

230-diffusion layer, 231-end outer edge, 232-first electrode sheet, 233-second electrode sheet,

240-a first insulating layer, 250-a first protective layer, 260-a light-enhancing layer,

300-a first flexible circuit board, 400-a bridging trace and 500-glue.

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 some of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

As shown in fig. 3, the display device disclosed in the present application includes an NFC module 100 and a backlight module 200. Wherein: the NFC module 100 includes an NFC coil 110 and an NFC ferrite 120. The backlight assembly 200 includes a diffusion layer 230 and a first insulating layer 240 stacked in sequence. The NFC coil 110 is disposed on the diffusion layer 230, the NFC coil 110 is located within the first insulating layer 240, and the NFC ferrite 120 is disposed on a side of the diffusion layer 230 facing away from the NFC coil 110.

The display device disclosed in the embodiment of the application comprises a display screen, wherein the display screen is superposed on the backlight module 200, and the display screen plays a display function under the backlight effect provided by the backlight module 200.

In the present application, the diffusion layer 230 diffuses the backlight emitted from the backlight module 200, so that the backlight is uniformly diffused and then emitted, thereby achieving a better light emitting effect. The first insulating layer 240 provides insulation protection for the NFC module 100 to prevent short circuit.

The NFC module 100 functions as an NFC function, and in a specific work project, the NFC ferrite 120 bunches magnetic flux to effectively increase an induction distance by increasing a magnetic field intensity, and the NFC coil 110 is used for generating an NFC signal. This application is through setting up NFC coil 110 on diffusion layer 230 and embedding within first insulating layer 240, make NFC coil 110 need not to occupy the superpose space alone, and then avoid occupation of NFC module 100 to backlight unit 200 superpose space, can effectively reduce this application display device thickness, through experimental data statistics, adopt the design of this application NFC module 100 and backlight unit 200 adaptation, display device's thickness attenuate about 300 mu m, do benefit to display device to frivolousization development, and then be favorable to electronic equipment to design towards thinner direction.

In a specific process implementation, the NFC coil 110 may be first attached to the diffusion layer 230 by an evaporation method, and then the first insulating layer 240 is stacked on the diffusion layer 230 by a vapor deposition method, so that the NFC coil 110 is located in the first insulating layer 240, 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 diffusion layer 230 by magnetron sputtering, and the nano silver may be disposed on the diffusion layer 230 by a liquid coating method.

Further, the NFC coil 110 may be disposed as a transparent trace to further improve the screen occupation ratio. Meanwhile, the NFC coil 110 can flexibly adjust the proportion of the transparent metal components by adopting an evaporation process so as to adapt to different working scenes.

In a more specific embodiment, as shown in fig. 1 and 3, the NFC coil 110 extends along an edge of the backlight module 200 and is disposed in a plurality of turns, the backlight module 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 200 b. Such a layout mode can effectively prevent the NFC coil 110 from entering the center of the display area 200a to reduce the screen occupation ratio, and the regular routing mode is also beneficial to avoiding the problem of card reading and screen flashing.

In some embodiments, as shown in fig. 1 and fig. 2, the NFC coil 110 includes a first coil end 111 adjacent to the center of the backlight module 200 and a second coil end 112 adjacent to the edge of the backlight module 200, the display device further includes a first flexible circuit board 300, a first end of the first flexible circuit board 300 is connected to the edge of the backlight module 200 and 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 bridge 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. The first flexible circuit board 300 is disposed at the edge of the backlight module 200, and is coupled to the bridging trace 400 and communicates with the first coil end 111 and the second coil end 112, so that the first flexible circuit board 300 can be ensured to be away from the center of the backlight module 200 while effectively transmitting the NFC signal, thereby avoiding interference with the operation of the backlight module 200.

In some embodiments, as shown in fig. 3, the backlight module 200 further includes a first protective layer 250, and the diffusion layer 230, the first insulating layer 240 and the first protective layer 250 are sequentially stacked. A first portion of the bridge trace 400 is disposed in the first insulating layer 240, and a second portion of the bridge trace 400 is disposed in the first protective layer 250.

Here, the first protection layer 250 may be made of different materials according to different specific working scenarios, for example, an organic photoresist layer for preventing water and oxygen corrosion is used to prevent water and oxygen corrosion, or the first protection layer 250 is made of the same material as the first insulation layer 240 to provide insulation protection.

The bridging trace 400 is partially located in the first insulating layer 240, so that the first coil end 111 can be connected while the first insulating layer 240 keeps a gap with other parts of the NFC coil 110, and the first insulating layer 240 can prevent a short circuit between the bridging trace 400 and the NFC coil 110; the first portion of the bridging trace 400 is disposed in the first insulating layer 240, and the second portion of the bridging trace 400 is disposed in the first protective layer 250, so that the bridging trace 400 is embedded between the first insulating layer 240 and the first protective layer 250, thereby preventing the bridging trace 400 from occupying the stacking space of the backlight module 200, and further thinning the display device.

More specifically, as shown in fig. 3, the backlight module 200 further includes a light source module layer 220. The light source module layer 220 is stacked on the side of the diffusion layer 230 facing away from the first insulating layer 240, and is located between the NFC ferrite 120 and the diffusion layer 230.

In the present application, the light source module layer 220 is used for emitting light, and is a core component of the backlight module 200, and the backlight module 200 achieves the purpose of emitting light through the light source module layer 220.

As shown in fig. 3 and 4, for a specific structure of the light source module layer 220, the light source module layer 220 may be configured to include a light guide layer 221 and a light source 222. The light source 222 is disposed on one side of the light guide layer 221, the light source module layer 220 is stacked on the diffusion layer 230 through the light guide layer 221, and light emitted from the light source 222 is incident into the light guide layer 221 and emitted through the light guide layer 221 to face away from the NFC ferrite 120. Because the whole area of leaded light layer 221 is greater than light source 222, light source subassembly layer 220 will give out light with the form of area light source like this finally, will make more even the sending of light through leaded light layer 221, and luminous effect is better.

More specifically, the light source module layer 220 may further include a reflective cover 223. The reflector 223 covers the light source 222 and is disposed opposite to the light guide layer 221, and a reflective opening is disposed on a side of the reflector 223 facing the light guide layer 221. The light emitted from the light source 222 is reflected by the reflector 223 and then enters the light guide layer 221 through the reflection port.

In this way, the light emitted from the light source 222 not only directly enters the light guide layer 221, but also partially enters the light guide layer 221 through the reflection port after being reflected by the reflection cover 223, so that the light entering the light guide layer 221 can be increased, the brightness of the light emitted from the light guide layer 221 can be enhanced, and the utilization rate of the light can be improved.

In some embodiments, as shown in fig. 3, the backlight module 200 may further include a reflective layer 210, the reflective layer 210 being stacked between the NFC ferrite 120 and the light source module layer 220. The light emitted from the light source 222 is incident into the light guide layer 221, and a second portion of the light is emitted toward the reflective layer 210 through the light guide layer 221. The second part of the light is reflected by the reflective layer 210 and then emitted toward the first part of the light. Thus, through the arrangement of the reflective layer 210, the second part of light can be reflected to the light emitting direction of the backlight module 200, i.e. the first part of light and the second part of light are converged and emitted in the same direction, and the brightness of the light emitted by the backlight module 200 is enhanced, thereby improving the utilization rate of the light.

In some embodiments, as shown in fig. 2 and 3, the diffusion layer 230 includes an end outer edge 231. The first insulating layer 240 forms a first projection on the diffusion layer 230, and the outer edge 231 of the end portion forms a second projection on the diffusion layer 230, wherein the first projection and the second projection are coplanar and located on one side of the second projection. The first electrode sheet 232 and the second electrode sheet 233 are fixed on the surface of the outer edge 231 of the end portion facing the display direction of the backlight module 200, the first end of the first flexible circuit board 300 is used for being electrically connected with the first electrode sheet 232 and the second electrode sheet 233, the first coil end 111 is electrically connected with the first electrode sheet 232 through the bridging wiring 400, and the second coil end 112 is electrically connected with the second electrode sheet 233. 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 232 and the second electrode sheet 233 can be fully exposed through the arrangement of the end outer edge 231, 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 232 and the second electrode sheet 233 as an intermediate transmission medium.

The first electrode sheet 232 and the second electrode sheet 233 may be made of ITO, nano silver, TiAlTi, or the like, or may be deposited on the surface of the diffusion layer 230.

Further, the backlight module 200 further includes a light-enhancing layer 260, wherein the light-enhancing layer 260 is stacked on a side of the first protective layer 250 facing away from the first insulating layer 240. The light-increasing layer 260 has a light-condensing effect, and light emitted by the light source module layer 220 is uniformly diffused by the diffusion layer 230, and then is increased in brightness by the light-increasing layer 260, so that the light-emitting effect of the light source module layer 220 is further enhanced.

Furthermore, as shown in fig. 3, the first end of the first flexible circuit board 300 is fixed to the first electrode plate 232 and the second electrode plate 233 in an overlapping manner, and a glue 500 is disposed between the end surfaces of the first electrode plate 232 and the second electrode plate 233 and the first flexible circuit board 300 to ensure that the connection is more stable, and meanwhile, the glue 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 vertical line glue as a bonding agent.

Further, the NFC coil 110, the first electrode sheet 232, and the second electrode sheet 233 are disposed on the same layer. For example, the light-shielding layers are disposed on the surface of the diffusion layer 230 and located in the first insulating layer 240, so as to improve the space utilization and further avoid occupying the stacking space of the backlight module 200.

In some embodiments, as shown in fig. 3, the surface of the NFC ferrite 120 facing the reflective layer 210 is a first end surface on which the protruding ring 121 is disposed. The projection of NFC coil 110 on the first end face is located in the projection of convex ring 121 on the first end face. The surface of the NFC ferrite 120 surrounded by the convex ring 121 can serve as a receiving surface for sending signals to the NFC coil 110, and the addition of the convex ring 121 on the surface of the NFC ferrite 120 can further focus magnetic flux, thereby improving the strength and stability of NFC signals.

In the display device disclosed in the embodiment of the present application, the backlight module 200 may further include a supporting frame, where the supporting frame is usually an iron frame, and the supporting frame can support other structures of the backlight module 200. In a further technical scheme, the support frame is the NFC ferrite 120, and under such a condition, the support frame is multiplexed with the NFC ferrite 120, so that the support frame of the backlight module 200 can exert an effect of dual purposes, the problem of thickness increase caused by stacking more structures on the backlight module 200 is avoided, and the display device is further facilitated to be designed towards a thinner direction.

It should be further noted that the specific process of sequentially stacking the reflective layer 210, the light source module layer 220, the diffusion layer 230, the first insulating layer 240, the first protective layer 250, and the light-enhancing layer 260 can be realized by vapor deposition.

The electronic device disclosed in the embodiment of the present application may be a mobile phone, a tablet computer, an electronic book reader, a wearable device (e.g., a smart watch, smart glasses), and the like, and the embodiment of the present application does not limit the specific kind of the electronic device.

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. 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 backlight module (200), wherein:

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

the backlight module (200) comprises a diffusion layer (230) and a first insulating layer (240) which are sequentially stacked,

the NFC coil (110) is arranged on the diffusion layer (230) and located inside the first insulating layer (240), and the NFC ferrite (120) is arranged on the side, facing away from the NFC coil (110), of the diffusion layer (230).

2. The display device according to claim 1, wherein the NFC coil (110) extends along an edge of the backlight module (200) and is disposed in a plurality of turns, the backlight module (200) includes a display region (200a) and a non-display region (200b), the non-display region (200b) is disposed around the display region (200a), a portion of the NFC coil (110) is located in the display region (200a), 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) comprises a first coil end (111) adjacent to a center of the backlight module (200) and a second coil end (112) adjacent to an edge of the backlight module (200), the display device further comprises a first flexible circuit board (300), a first end of the first flexible circuit board (300) is connected to the edge of the backlight module (200) and 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 a bridge trace (400).

4. The display device according to claim 3, wherein the backlight module (200) further comprises a first protective layer (250), the diffusion layer (230), the first insulating layer (240), and the first protective layer (250) being sequentially stacked,

a first portion of the bridging trace (400) is disposed within the first insulating layer (240), and a second portion of the bridging trace (400) is disposed within the first protective layer (250).

5. The display device according to claim 3, wherein the backlight module (200) further comprises a light source module layer (220), wherein the light source module layer (220) is stacked on a side of the diffusion layer (230) facing away from the first insulating layer (240) and is located between the NFC ferrite (120) and the diffusion layer (230).

6. The display device according to claim 5, wherein the light source module layer (220) comprises a light guiding layer (221) and a light source (222),

the light source (222) is arranged on one side of the light guide layer (221), the light source component layer (220) is overlapped on the diffusion layer (230) through the light guide layer (221),

the light emitted by the light source (222) is incident into the light guide layer (221), and a first part of the light emitted back to the NFC ferrite (120) is emitted through the light guide layer (221).

7. The display device according to claim 6, wherein the light source module layer (220) further comprises a reflector (223),

the reflecting cover (223) covers the light source (222) and is arranged opposite to the light guide layer (221), one side of the reflecting cover (223) facing the light guide layer (221) is provided with a reflecting port,

the light emitted by the light source (222) is reflected by the reflecting cover (223) and then enters the light guide layer (221) through the reflecting opening.

8. The display device of claim 6, wherein the backlight module (200) further comprises a reflective layer (210), the reflective layer (210) being stacked between the NFC ferrite (120) and the light source module layer (220),

the light emitted by the light source (222) is incident into the light guide layer (221), and a second part of light is emitted towards the reflecting layer (210) through the light guide layer (221),

the second part of light rays are reflected by the reflecting layer (210) and then emitted towards the direction of the first part of light rays.

9. A display device as claimed in claim 5, characterized in that the diffusion layer (230) comprises an end outer edge (231),

the first insulating layer (240) forms a first projection on the diffusion layer (230), the end outer edge (231) forms a second projection on the diffusion layer (230), the first projection and the second projection are coplanar and located on one side of the second projection,

the end portion outer edge (231) faces the surface of the display direction of the backlight module (200) and is fixedly provided with a first electrode plate (232) and a second electrode plate (233), the first end of the first flexible circuit board (300) is electrically connected with the first electrode plate (232) and the second electrode plate (233), the first coil end (111) is electrically connected with the first electrode plate (232) through the bridging wiring (400), and the second coil end (112) is electrically connected with the second electrode plate (233).

10. The display device according to claim 4, wherein the backlight module (200) further comprises a light-enhancing layer (260), and the light-enhancing layer (260) is stacked on a side of the first protective layer (250) facing away from the first insulating layer (240).

11. The display device according to claim 9, wherein a first end of the first flexible circuit board (300) is fixed to the first electrode sheet (232) and the second electrode sheet (233) in a lap joint manner, and a sealant (500) is provided between end faces of the first electrode sheet (232) and the second electrode sheet (233) and the first flexible circuit board (300).

12. The display device according to claim 9, wherein the NFC coil (110), the first electrode sheet (232), and the second electrode sheet (233) are provided on the same layer.

13. The display device according to claim 1, wherein the backlight module (200) further comprises a support frame, and the support frame is the NFC ferrite (120).

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

15. An electronic apparatus characterized by comprising the display device according to any one of claims 1 to 14.