WO2022161333A1

WO2022161333A1 - Electronic equipment and display device

Info

Publication number: WO2022161333A1
Application number: PCT/CN2022/073628
Authority: WO
Inventors: 杨浩; 刘风
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: CN112927614B; CN112927614A

Abstract

A display device and electronic equipment comprising the display device. The display device comprises an NFC module (100) and a backlight module (200). The NFC module (100) comprises an NFC coil (110) and an NFC ferrite sheet (120). The backlight module (200) comprises a diffusion layer (230) and a first insulating layer (240) stacked in sequence. The NFC coil (110) is provided on the diffusion layer (230) and arranged within the first insulating layer (240). The NFC ferrite sheet (120) is provided on the side of the diffusion layer (230) facing away from the NFC coil (110).

Description

Electronic equipment and display devices

cross reference

The present invention claims the priority of a Chinese patent application with an application number of 202110120602.0 and an invention title of "Electronic Equipment and Display Device" filed with the China Patent Office on January 28, 2021, the entire contents of which are incorporated herein by reference. .

technical field

The present application relates to the field of electronic equipment, and in particular, to electronic equipment and display devices.

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, an electronic device is configured with a Near Field Communication (Near Field Communication, NFC) 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 present invention proposes a display device to solve the problem of increased thickness caused by the NFC module occupying the stacking space of the display device.

In one aspect, the present application discloses a display device including an NFC module and a backlight module, wherein: the NFC module includes an NFC coil and an NFC ferrite; the backlight module includes a diffusion layer and a first an insulating layer, the NFC coil is disposed on the diffusion layer and within the first insulating layer, and the NFC ferrite is disposed on the side of the diffusion layer facing away from the NFC coil.

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

The beneficial effects of the present invention are as follows:

In the present application, by optimizing the structure of the display device, the NFC coil is arranged on the diffusion layer and located in the first insulating layer, so as to realize the embedding of the NFC module in the display device, thereby avoiding the occupation of the stacking space of the display device by the NFC module. And reducing the thickness of the display device is conducive to the development of the display device to be lighter and thinner, and ultimately is conducive to the design of the electronic device in a thinner direction.

Description of drawings

The drawings described herein are used to provide further understanding of the present application and constitute a part of the present application. The schematic embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation of the present application. In the attached image:

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 at I of Fig. 1 disclosed in an embodiment of the present invention;

3 is a cross-sectional view taken along the M-M direction of FIG. 1 disclosed in an embodiment of the present invention;

FIG. 4 is a structural diagram of a light source component layer disclosed in an embodiment of the present invention.

Description of reference numbers:

100-NFC module,

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

120-NFC ferrite, 121-convex ring,

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

210 - 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-first insulating layer, 250-first protective layer, 260-brightening layer,

300-first flexible circuit board, 400-bridge wiring, 500-gel.

Detailed ways

In order to make the objectives, technical solutions and advantages of the present application clearer, the technical solutions of the present application will be clearly and completely described below with reference to the specific embodiments of the present application and the corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, but 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.

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 the NFC coil 110 and the NFC ferrite 120 . The backlight module 200 includes a diffusion layer 230 and a first insulating layer 240 that are stacked in sequence. The NFC coil 110 is disposed on the diffusion layer 230 , the NFC coil 110 is located in the first insulating layer 240 , and the NFC ferrite 120 is disposed on the side of the diffusion layer 230 facing away from the NFC coil 110 .

The display device disclosed in the embodiment of the present application includes a display screen, and the display screen is stacked on the backlight module 200 , and performs a display function under the backlight provided by the backlight module 200 .

In the present application, the diffusion layer 230 performs diffusion treatment on the backlight emitted by the backlight module 200 to make it diffuse evenly and then emits it, so as to achieve a better light-emitting effect. The first insulating layer 240 provides insulating protection for the NFC module 100 to prevent short circuit.

The function of the NFC module 100 is to play the NFC function. In a specific work project, the NFC ferrite 120 gathers magnetic flux to effectively increase the sensing distance by increasing the magnetic field strength, while the NFC coil 110 is used to generate an NFC signal. In the present application, the NFC coil 110 is disposed on the diffusion layer 230 and embedded in the first insulating layer 240, so that the NFC coil 110 does not need to occupy the stacking space separately, thereby avoiding the NFC module 100 occupying the stacking space of the backlight module 200. The thickness of the display device of the present application can be effectively reduced. According to the statistics of the test data, the thickness of the display device is reduced by about 300 μm by adopting the design method of the adaptation of the NFC module 100 and the backlight module 200 of the present application. It is conducive to the design of electronic equipment towards thinner direction.

In the implementation of the specific process, the NFC coil 110 may be deposited on the diffusion layer 230 by vapor deposition first, and then the first insulating layer 240 may be stacked on the diffusion layer 230 by vapor deposition, and the NFC coil 110 It is in the first insulating layer 240 to realize the assembly of the display device of the present application. The specific materials of the NFC coil 110 can be transparent ITO, nano-silver, TiAlTi, etc. As an alternative process method, ITO and TiAlTi can be arranged on the diffusion layer 230 by magnetron sputtering, and the nano-silver can be coated with liquid. method is provided on the diffusion layer 230 .

Further, the NFC coil 110 can be set as a transparent wire to further improve the screen ratio. At the same time, the NFC coil 110 can flexibly adjust the proportion of transparent metal components by using an evaporation process to adapt to different working scenarios.

In a more specific embodiment, as shown in FIG. 1 and FIG. 3 , the NFC coil 110 extends along the edge of the backlight module 200 and is arranged in multiple circles. 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 part of the NFC coil 110 is located in the display area 200a, and another part of the NFC coil 110 is located in the non-display area 200b. Such a layout method 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 method is also beneficial to avoid the problem of screen flashing during card reading.

In some embodiments, as shown in FIGS. 1 and 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 Including a first flexible circuit board 300, the first end of the first flexible circuit board 300 is connected to the edge of the backlight module 200, and is electrically connected to the second coil end 112, and the first coil end 111 is connected to the first coil end 111 through the bridge wiring 400. The flexible circuit board 300 is electrically connected.

The design of the first flexible circuit board 300 can transmit the NFC signal generated by the NFC module 100 to the external chip to complete the signal transmission. The first flexible circuit board 300 is disposed on the edge of the backlight module 200, and the layout of connecting the first coil end 111 and the second coil end 112 with the bridge wiring 400 can ensure that the first flexible circuit board 300 can effectively transmit NFC At the same time, the signal is far away from the center of the backlight module 200 to avoid interfering with the work 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 stacked in sequence. The first part of the bridging trace 400 is disposed in the first insulating layer 240 , and the second part of the bridging trace 400 is disposed in the first protective layer 250 .

Here, the first protective layer 250 can be selected in different materials according to different working scenarios, for example, an organic photoresist layer that prevents water and oxygen corrosion is used to prevent water and oxygen corrosion, or the first protective layer 250 is selected from the first insulating layer. 240 of the same material to provide insulation protection.

The way that the bridging trace 400 is partially located in the first insulating layer 240 can realize the connection between the first coil end 111 and other parts of the NFC coil 110 at the same time, so that the first insulating layer 240 can prevent the bridging trace 400 from being connected to the NFC coil. 110; the first part of the bridging trace 400 is disposed in the first insulating layer 240, and the second part of the bridging trace 400 is disposed in the first protective layer 250, so that the bridging trace 400 can be embedded in the first protective layer 250. Between the insulating layer 240 and the first protective layer 250 , the bridging traces 400 can prevent the stacking space of the backlight module 200 from occupying, thereby further reducing the thickness of the display device.

More specifically, as shown in FIG. 3 , the backlight module 200 further includes a light source component layer 220 . The light source component 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 this application, the light source assembly layer 220 is used to emit light, and is the 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 FIG. 4 , for the specific structure of the light source component layer 220 , the light source component layer 220 may be configured to include a light guide 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 stacked on the diffusion layer 230 through the light guide layer 221 , the light emitted by the light source 222 will enter the light guide layer 221 , and will be emitted backward through the light guide layer 221 . The first part of the light emitted by the NFC ferrite 120 . Since the overall area of the light guide layer 221 is larger than that of the light source 222, the light source component layer 220 will eventually emit light in the form of a surface light source, so that the light will be emitted more uniformly through the light guide layer 221, and the luminous effect will be better.

More specifically, the light source component layer 220 may further include a reflector 223 . The reflector 223 covers the light source 222 and is disposed opposite to the light guide layer 221 . The reflector 223 is provided with a reflector on the side facing the light guide layer 221 . The light emitted by the light source 222 will enter the light guide layer 221 through the reflection port after being reflected by the reflection cover 223 .

In this way, in addition to the light directly incident on the light guide layer 221, the light emitted by the light source 222 will also enter the light guide layer 221 through the reflection port after being reflected by the reflector 223, so that the incident light can be injected into the light guide layer 221. The light of the layer 221 is increased, thereby enhancing the brightness of the light emitted by the light guide layer 221, and at the same time, the utilization rate of light 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 by the light source 222 will enter the light guide layer 221 and emit a second part of the light toward the reflection layer 210 through the light guide layer 221 . After the second part of the light is reflected by the reflective layer 210, it will be emitted in the direction of the first part of the light. In this way, through the setting of the reflective layer 210, the second part of the light can be reflected to the light exit direction of the backlight module 200, that is, the first part of the light and the second part of the light are combined and emitted in the same direction, and the brightness of the light emitted by the backlight module 200 can be enhanced. , thereby improving the utilization of light.

In some embodiments, as shown in FIGS. 2 and 3 , the diffusion layer 230 includes end outer edges 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. The first projection and the second projection are coplanar and located on one side of the second projection. A first electrode sheet 232 and a 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 , and the first end of the first flexible circuit board 300 is used for connecting with the first electrode sheet 232 and the second electrode sheet. The sheet 233 is electrically connected, the first coil end 111 is electrically connected to the first electrode sheet 232 through the bridge wiring 400 , and the second coil end 112 is electrically connected to the second electrode sheet 233 . The second end of the first flexible circuit board 300 is used for electrical connection with the 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 outer edge 231 of the end portion, which facilitates the connection between the NFC coil 110 and the first flexible circuit board 300 . And the second electrode sheet 233 is used as an intermediate transmission medium, which is more conducive to the transmission of the signal generated by the NFC coil 110 to the first flexible circuit board 300 .

In terms of specific material selection, both the first electrode sheet 232 and the second electrode sheet 233 can be made of ITO, nano-silver, TiAlTi, etc. In terms of specific technological means, they can also be deposited on the diffusion layer 230 by vapor deposition. s surface.

Furthermore, the backlight module 200 further includes a light-enhancing layer 260 , and the light-enhancing layer 260 is stacked on the side of the first protective layer 250 facing away from the first insulating layer 240 . The light-enhancing layer 260 has the function of concentrating light. After the light emitted by the light source component layer 220 is evenly diffused by the diffusing layer 230 , the brightness is increased by the light-enhancing layer 260 to further enhance the luminous effect of the light source component layer 220 .

Further, as shown in FIG. 3 , the first end of the first flexible circuit board 300 is overlapped and fixed on the first electrode sheet 232 and the second electrode sheet 233 , and the end faces of the first electrode sheet 232 and the second electrode sheet 233 A glue 500 is arranged between the first flexible circuit board 300 to ensure a more stable connection, and at the same time, the glue 500 can prevent the first end of the first flexible circuit board 300 from being bent at a large angle, thereby protecting the first The role of the flexible circuit board 300 . Among them, the colloid 500 can choose vertical glue as the adhesive.

Further, the NFC coil 110 , the first electrode sheet 232 and the second electrode sheet 233 are arranged in the same layer. For example, they are all disposed on the surface of the diffusion layer 230 and inside the first insulating layer 240 to improve 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, and the first end surface is provided with a convex ring 121 . The projection of the NFC coil 110 on the first end face is located in the projection of the convex ring 121 on the first end face. The surface of the NFC ferrite 120 surrounded by the convex ring 121 can be used as a receiving surface for sending signals to the NFC coil 110, and adding the convex ring 121 on the surface of the NFC ferrite 120 can further focus the magnetic flux, improve the strength of the NFC signal and stability.

In the display device disclosed in the embodiment of the present application, the backlight module 200 may further include a support frame, the support frame is usually an iron frame, and the support frame can support other structures of the backlight module 200 . In a further technical solution, the support frame is the NFC ferrite 120. In this case, the support frame and the NFC ferrite 120 are multiplexed, so that the support frame of the backlight module 200 can play a dual-purpose effect. The problem of increased thickness caused by stacking more structures of the backlight module 200 is avoided, which further facilitates the design of the display device in a thinner direction.

It should also be pointed out here that the specific process means for realizing the stacking of the reflective layer 210 , the light source component layer 220 , the diffusion layer 230 , the first insulating layer 240 , the first protective layer 250 and the light enhancement layer 260 in sequence can be achieved by vapor deposition. accomplish.

The electronic devices disclosed in the embodiments of the present application may be mobile phones, tablet computers, e-book readers, wearable devices (eg, smart watches, smart glasses), etc. The embodiments of the present application do not limit the specific types of electronic devices.

The above descriptions are merely examples of the present application, and are not intended to limit the present application. Various modifications and variations of this application are possible for those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this application shall be included within the scope of the claims of this application.

Claims

A display device, comprising 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) stacked in sequence,

The NFC coil (110) is provided on the diffusion layer (230) and is located within the first insulating layer (240), and the NFC ferrite (120) is provided on the diffusion layer (230) The side facing away from the NFC coil (110).
The display device according to claim 1, wherein the NFC coil (110) extends along the edge of the backlight module (200) and is arranged in multiple circles, and the backlight module (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 device according to claim 1, wherein the NFC coil (110) comprises a first coil end (111) adjacent to the center of the backlight module (200) and a first coil end (111) adjacent to the backlight module (200) The second coil end (112) at the edge, the display device further comprises a first flexible circuit board (300), the first end of the first flexible circuit board (300) is connected to the back light module (200) The edge 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 a bridge wire (400).
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 The first protective layers (250) are stacked in sequence,

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).
The display device according to claim 3, wherein the backlight module (200) further comprises a light source component layer (220), and the light source component layer (220) is stacked on the diffusion layer (230) and faces away from the light source component layer (220). one side of the first insulating layer (240) and located between the NFC ferrite (120) and the diffusion layer (230).
The display device according to claim 5, wherein the light source component layer (220) comprises a light guide layer (221) and a light source (222),

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

The light emitted by the light source (222) will enter the light guide layer (221), and the first part of the light emitted away from the NFC ferrite (120) will be emitted through the light guide layer (221).
The display device according to claim 6, wherein the light source component layer (220) further comprises a reflector (223),

The reflector (223) covers the light source (222) and is arranged opposite to the light guide layer (221), and the reflector (223) is provided with a side facing the light guide layer (221). reflector,

The light emitted by the light source (222), after being reflected by the reflection cover (223), will enter the light guide layer (221) through the reflection opening.
The display device according to claim 6, wherein the backlight module (200) further comprises a reflective layer (210), and the reflective layer (210) is stacked on the NFC ferrite (120) and the between the light source component layers (220),

The light emitted by the light source (222) will enter the light guide layer (221), and the second part of the light will be emitted toward the reflection layer (210) through the light guide layer (221),

After the second part of the light is reflected by the reflective layer (210), it will be emitted in the direction of the first part of the light.
The display device according to claim 5, wherein 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 outer edge (231) of the end portion forms a second projection on the diffusion layer (230), the first projection the projection is coplanar with the second projection and is located on one side of the second projection,

A first electrode sheet (232) and a 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 flexible circuit board (300) The first end of the coil is electrically connected to the first electrode sheet (232) and the second electrode sheet (233), and the first coil end (111) is connected to the first coil end (111) through the bridge wire (400) The electrode sheet (232) is electrically connected, and the second coil end (112) is electrically connected with the second electrode sheet (233).
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 the first protective layer (250) facing away from the on one side of the first insulating layer (240).
The display device according to claim 9, wherein the first end of the first flexible circuit board (300) is overlapped and fixed on the first electrode sheet (232) and the second electrode sheet (233) , a colloid (500) is arranged between the end faces of the first electrode sheet (232) and the second electrode sheet (233) and the first flexible circuit board (300).
The display device according to claim 9, wherein the NFC coil (110), the first electrode sheet (232) and the second electrode sheet (233) are arranged in the same layer.
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).
The display device according to claim 1, wherein the NFC coil (110) is a transparent wire.
An electronic device, comprising the display device according to any one of claims 1 to 14.