CN112927614B

CN112927614B - Electronic device and display device

Info

Publication number: CN112927614B
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: 2023-06-16
Anticipated expiration: 2041-01-28
Also published as: CN112927614A; WO2022161333A1

Abstract

The embodiment of the application discloses display device, including NFC module and backlight unit, the NFC module includes NFC coil and NFC ferrite, backlight unit is including spreading layer and first insulating layer that superpose in proper order, NFC coil sets up on the spreading layer and is located first insulating layer, NFC ferrite sets up in the one side of spreading layer dorsad NFC coil, this kind of structure can realize in the NFC module imbeds backlight unit, and then avoid the NFC module to the occupation of display device superpose space, and reduce display device thickness, do benefit to display device to frivolous development, the application still discloses an electronic equipment.

Description

Electronic device and display device

Technical Field

The present disclosure relates to the field of electronic devices, and in particular, to an electronic device and a display device.

Background

With the increase of user demands, more and more functional modules are configured in electronic devices. 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, an electronic device is configured with a near field communication (Near Field Communication, NFC) module. The NFC module can enable the electronic equipment to have a short-range wireless communication function. In this case, the electronic device may be used for payment, movement monitoring, door opening, etc., which obviously further widens the application scenario of the electronic device.

In the related art, an electronic device is configured with a display module, and an NFC module is attached to a back surface of the display module (i.e., a surface opposite to a display surface of the display module), so as to realize stacked installation of the NFC module and the display module. However, such an assembly structure may result in a larger thickness of the electronic device, and thus may not meet the requirement of the electronic device for developing in a thinner direction.

Disclosure of Invention

The invention provides a display device to solve the problem of thickness increase caused by the fact that NFC modules occupy the stacking 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 stacked, the NFC coil is arranged on the diffusion layer and is positioned in the first insulating layer, and the NFC ferrite is arranged on one side, opposite to the NFC coil, of the diffusion layer.

In another aspect, the application discloses an electronic device comprising the display device.

The beneficial effects of the invention are as follows:

according to the NFC module embedded display device, the structure of the display device is optimized, the NFC coil is arranged on the diffusion layer and located in the first insulating layer, and the NFC module is embedded into the display device, so that the occupation of the NFC module to the stacking space of the display device is avoided, the thickness of the display device is reduced, the display device is facilitated to develop towards light and thin, and finally the electronic equipment is facilitated to design towards a 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 embodiments of the application and together with the description serve to explain the application and do not constitute an undue limitation to the application. In the drawings:

fig. 1 is a layout diagram of an NFC module in a display device disclosed in an embodiment of the present invention;

FIG. 2 is an enlarged view of the area I of FIG. 1, as disclosed in the embodiment of the present invention;

FIG. 3 is a cross-sectional view taken along the M-M direction 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 present invention.

Reference numerals illustrate:

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 region, 200 b-non-display region,

210-a reflective layer,

220-light source assembly layer, 221-light guide layer, 222-light source, 223-reflecting cover,

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

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

300-first flexible circuit board, 400-bridging wire, 500-colloid.

Detailed Description

For the purposes, technical solutions and advantages of the present application, the technical solutions of the present application will be clearly and completely described below with reference to specific embodiments of the present application and corresponding drawings. It will be apparent that the described embodiments are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.

The display device disclosed in the application is shown in fig. 3, and 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 module 200 includes a diffusion layer 230 and a first insulating layer 240 sequentially stacked. The NFC coil 110 is disposed on the diffusion layer 230, and 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 includes a display screen, wherein the display screen is stacked on the backlight module 200, and 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 insulating protection for the NFC module 100 from shorting.

The function of the NFC module 100 is to perform NFC function, in a specific work engineering, the NFC ferrite 120 bundles magnetic flux, and the induction distance is effectively increased by increasing the magnetic field strength, 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, makes NFC coil 110 need not to occupy the stack space alone, and then avoids NFC module 100 to backlight unit 200 stack space's occupation, can effectively reduce this application display device thickness, through experimental data statistics, adopts the design mode of this application NFC module 100 and backlight unit 200 adaptation, display device's thickness attenuate about 300 mu m, does benefit to display device to frivolous development, and then is favorable to electronic equipment to thinner direction design.

In a specific process implementation, the NFC coil 110 may be first applied on the diffusion layer 230 by vapor deposition, and then the first insulating layer 240 is stacked on the diffusion layer 230 by vapor deposition, and the NFC coil 110 is located in the first insulating layer 240, so as to realize the assembly of the display device of the present application. The specific materials of the NFC coil 110 may be transparent ITO, nano silver, tiaalti, etc., and as an alternative process means, the ITO and tiaalti may be disposed on the diffusion layer 230 by using a magnetron sputtering method, and the nano silver may be disposed on the diffusion layer 230 by using a liquid coating method.

Further, the NFC coil 110 may be configured as a transparent trace to further increase the screen duty cycle. 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 200b. The layout manner can effectively prevent the NFC coil 110 from entering the center of the display area 200a to reduce the screen ratio, and the regular wiring manner is also beneficial to avoiding the problem of card reading and screen flashing.

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 backlight module 200 and a second coil end 112 adjacent to an edge of the backlight module 200, and the display device further includes a first flexible circuit board 300, where the 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 bridging trace 400.

The design of the first flexible circuit board 300 can 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 matched with the layout mode of the bridging wire 400 to simultaneously communicate the first coil end 111 and the second coil end 112, so that the first flexible circuit board 300 can be ensured to be far away from the center of the backlight module 200 while effectively transmitting NFC signals, so as to avoid 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. The first portion of the bridging wire 400 is disposed in the first insulating layer 240, and the second portion of the bridging wire 400 is disposed in the first protective layer 250.

The first protection layer 250 may be made of different materials according to specific working situations, for example, an organic photoresist layer for preventing water oxygen corrosion is used to prevent water 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 wire 400 is partially located in the first insulating layer 240, so that the first coil end 111 can be connected while keeping a space with other parts of the NFC coil 110, so that the first insulating layer 240 can prevent a short circuit between the bridging wire 400 and the NFC coil 110; the first portion of the bridging wire 400 is disposed in the first insulating layer 240, and the second portion of the bridging wire 400 is disposed in the first protective layer 250, so that the bridging wire 400 can be embedded between the first insulating layer 240 and the first protective layer 250, so as to prevent the bridging wire 400 from occupying the stacking space of the backlight module 200, and further reduce the thickness of the display device.

More specifically, as shown in fig. 3, the backlight module 200 further includes a light source assembly layer 220. The light source assembly 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.

In this application, the light source assembly 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 assembly 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 provided 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 assembly layer 220 is stacked on the diffusion layer 230 through the light guide layer 221, and the light emitted by the light source 222 is incident into the light guide layer 221 and emits a first portion of light emitted back to the NFC ferrite 120 through the light guide layer 221. Because the whole area of the light guide layer 221 is larger than that of the light source 222, the light source assembly layer 220 finally emits light in the form of a surface light source, so that light rays are emitted more uniformly through the light guide layer 221, and the light emitting effect is better.

More specifically, the light source module layer 220 may further include a reflecting cover 223. The reflecting cover 223 is covered by the light source 222 and is arranged opposite to the light guiding layer 221, and the reflecting cover 223 is provided with a reflecting opening towards the light guiding layer 221. The light emitted from the light source 222 is reflected by the reflecting cover 223 and then enters the light guiding layer 221 through the reflecting opening.

In this way, the light emitted from the light source 222, in addition to the light directly entering the light guiding layer 221, also has a part of the light reflected by the reflecting cover 223 and then enters the light guiding layer 221 through the reflecting opening, so that the light entering the light guiding layer 221 can be increased, the brightness of the light emitted from the light guiding layer 221 can be further enhanced, and the light utilization rate can be improved.

In some embodiments, as shown in fig. 3, the backlight module 200 may further include a reflective layer 210, and the reflective layer 210 is stacked between the NFC ferrite 120 and the light source assembly layer 220. The light emitted from the light source 222 is incident on the light guiding layer 221, and is emitted from the light guiding layer 221 toward the reflective layer 210. The second portion of the light is reflected by the reflective layer 210 and then emitted toward the first portion of the light. In this way, by the arrangement of the reflective layer 210, the second portion of light can be reflected to the light emitting direction of the backlight module 200, that is, the first portion of light and the second portion of light are converged and emitted in the same direction, and the brightness of the light emitted by the backlight module 200 is enhanced, so that the light utilization rate is improved.

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 end outer edge 231 forms a second projection on the diffusion layer 230, where the first projection is coplanar with the second projection and is located at one side of the second projection. The surface of the end outer edge 231 facing the display direction of the backlight module 200 is fixed with a first electrode plate 232 and a second electrode plate 233, the first end of the first flexible circuit board 300 is used for being 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 wire 400, and the second coil end 112 is electrically connected with the second electrode plate 233. The second end of the first flexible circuit board 300 is used for electrically connecting with a motherboard of the electronic device.

In this way, the first electrode piece 232 and the second electrode piece 233 can be fully exposed through the arrangement of the end outer edge 231, so that connection between the NFC coil 110 and the first flexible circuit board 300 is facilitated, and signals generated by the NFC coil 110 are more facilitated to be transmitted to the first flexible circuit board 300 through the first electrode piece 232 and the second electrode piece 233 as intermediate transmission media.

The first electrode piece 232 and the second electrode piece 233 can be made of ITO, nano silver, tiAlTi, etc. on a specific material, or can be coated on the surface of the diffusion layer 230 by vapor deposition.

Further, the backlight module 200 further includes a light enhancement layer 260, and the light enhancement layer 260 is stacked on a side of the first protection layer 250 facing away from the first insulating layer 240. The light enhancement layer 260 has a light gathering effect, and after the light emitted by the light source component layer 220 is uniformly diffused by the diffusion layer 230, the brightness of the light is increased by the light enhancement layer 260, so that the light emitting effect of the light source component layer 220 is further enhanced.

Further, as shown in fig. 3, the first end of the first flexible circuit board 300 is lap-jointed and fixed on the first electrode plate 232 and the second electrode plate 233, and a colloid 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 colloid 500 can avoid the first end of the first flexible circuit board 300 from bending at a larger angle, thereby protecting the first flexible circuit board 300. Wherein, the colloid 500 can be selected from the group consisting of a vertical line glue as an adhesive.

Further, the NFC coil 110, the first electrode piece 232, and the second electrode piece 233 are arranged in the same layer. For example, the first insulating layers 240 are disposed on the surface of the diffusion layer 230, so as to improve the space utilization, and further avoid occupying the stacked 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, and a convex ring 121 is disposed on the first end surface. The projection of the NFC coil 110 on the first end surface is located in the projection of the torus 121 on the first end surface. The surface of the NFC ferrite 120 surrounded by the bulge loop 121 may be used as a receiving surface for sending signals to the NFC coil 110, and adding the bulge loop 121 to the surface of the NFC ferrite 120 may further bunch magnetic flux, so as to improve the intensity 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, which is usually an iron frame, and the supporting frame can support other structures of the backlight module 200. In a further technical scheme, the supporting frame is the NFC ferrite 120, under this condition, the supporting frame is multiplexing with the NFC ferrite 120 for the supporting frame of backlight unit 200 can exert a dual-purpose effect, avoids backlight unit 200 to pile up the thickness increase problem that more structures lead to, further is favorable to display device to design towards thinner direction.

It should be further noted that the specific process means for implementing the sequential stacking of 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 enhancement layer 260 may be implemented by vapor deposition.

The electronic device disclosed in the embodiments of the present application may be a mobile phone, a tablet computer, an electronic book reader, a wearable device (such as a smart watch, a smart glasses), etc., and the embodiments of the present application do not limit specific types of electronic devices.

The foregoing is merely exemplary of the present application and is not intended to limit the present application. Various modifications and changes may be made to the present application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc. which are within the spirit and principles of the present application are intended to be included within the scope of the claims of the present application.

Claims

1. The display device is characterized by 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), a first insulating layer (240) and a first protective layer (250) which are sequentially stacked,

the NFC coil (110) is arranged on the diffusion layer (230) and is positioned in the first insulating layer (240), and the NFC ferrite (120) is arranged on one side of the diffusion layer (230) opposite to the NFC coil (110);

the NFC coil (110) extends around the edge of the backlight module (200) and is arranged in a plurality of circles, the diffusion layer (230) comprises an end outer edge (231), a first electrode plate (232) and a second electrode plate (233) are fixed on the surface of the end outer edge (231) facing the display direction of the backlight module (200), the first electrode plate (232) and the second electrode plate (233) are arranged at intervals, and the NFC coil (110), the first electrode plate (232) and the second electrode plate (233) are arranged in the same layer;

the NFC coil (110) comprises 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 first coil end (111) is electrically connected with the first electrode piece (232) through a bridging wire (400), the second coil end (112) is adjacent to the second electrode piece (233), and the second coil end (112) is electrically connected with the second electrode piece (233);

the first part of the bridging wire (400) is arranged in the first insulating layer (240), and the second part of the bridging wire (400) is arranged in the first protective layer (250).

2. The display device according to claim 1, wherein the backlight module (200) comprises a display area (200 a) and a non-display area (200 b), the non-display area (200 b) is disposed around the display area (200 a), a portion of the NFC coil (110) is located in the display area (200 a), and another portion of the NFC coil (110) is located in the non-display area (200 b).

3. The display device according to claim 1, further comprising a first flexible circuit board (300), wherein a first end of the first flexible circuit board (300) is connected to an edge of the backlight module (200) and is electrically connected to the second coil end (112), and wherein the first coil end (111) is electrically connected to the first flexible circuit board (300) through a bridging trace (400).

4. A display device according to claim 3, wherein the backlight module (200) further comprises a light source assembly layer (220), and the light source assembly 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).

5. The display device according to claim 4, wherein the light source module layer (220) includes a light guide layer (221) and a light source (222),

the light source (222) is arranged at 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),

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

6. The display device according to claim 5, wherein the light source module layer (220) further comprises a reflective cover (223),

the reflecting cover (223) is covered on 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 opening,

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

7. The display device of claim 5, 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 assembly layer (220),

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

the second part of light rays are emitted towards the first part of light rays after being reflected by the reflecting layer (210).

8. The display device of claim 4, wherein 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 is coplanar with and on one side of the second projection,

a first end of the first flexible circuit board (300) is electrically connected with the first electrode pad (232) and the second electrode pad (233).

9. The display device according to claim 1, wherein the backlight module (200) further comprises a light enhancement layer (260), the light enhancement layer (260) being stacked on a side of the first protective layer (250) facing away from the first insulating layer (240).

10. A display device according to claim 3, wherein the first end of the first flexible circuit board (300) is lap-fixed on the first electrode sheet (232) and the second electrode sheet (233), and a colloid (500) is provided between the end surfaces of the first electrode sheet (232) and the second electrode sheet (233) and the first flexible circuit board (300).

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

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

13. An electronic device comprising the display device according to any one of claims 1 to 12.