CN116207871A

CN116207871A - Wireless charging module integrated on cover plate glass, electronic equipment and processing method

Info

Publication number: CN116207871A
Application number: CN202310303510.5A
Authority: CN
Inventors: 徐世慧
Original assignee: Iray Technology Co Ltd
Current assignee: Iray Technology Co Ltd
Priority date: 2023-03-27
Filing date: 2023-03-27
Publication date: 2023-06-02

Abstract

The application relates to wireless charging technical field discloses a wireless module of charging of integration on cover glass, include: a wireless coil located within the cover glass display area; coil leads which are positioned in the silk-screen printing area of the display area surrounded by the cover glass and connected with the wireless coils; and the conductive adhesive is positioned on the coil lead. The wireless coil and the coil lead wire are integrated on the cover plate glass, so that the wireless charging function can be realized, any device with metal material can be placed on the other side of the whole machine, the metal material can be used for the shell on the whole other side, the defect that one side of the traditional wireless charging equipment is a screen and the other side of the traditional wireless charging equipment is a nonmetal is overcome, the thickness of the traditional wireless charging module is basically negligible, the thickness of a product is reduced, and the competitiveness is improved.

Description

Wireless charging module integrated on cover plate glass, electronic equipment and processing method

Technical Field

The invention relates to the technical field of wireless charging, in particular to a wireless charging module integrated on cover glass, electronic equipment and a processing method.

Background

At present, the wireless charging technology is widely applied to various fields such as mobile phones, tablet personal computers, electric toothbrushes, handrings, electronic watches and the like, and the wireless charging technology is characterized in that energy is conducted to a charging terminal device through near-field induction by the wireless charging device, and the terminal device converts the received energy into electric energy to be stored in a battery of the device.

The nature of wireless charging technology is energy transfer and conversion, which determines that it cannot penetrate metal materials. As shown in fig. 1 and 2, when at least one lens a containing a metal material is provided on a front surface (lens side surface) of a certain device and a screen (e.g., touch screen) b containing a metal material is provided on a rear surface (screen side surface), wireless charging technology cannot be applied.

Therefore, how to solve the problem that the device with the metal material on the surface of the screen cannot realize the wireless charging function is a technical problem to be solved by those skilled in the art.

Disclosure of Invention

Accordingly, the present invention is directed to a wireless charging module, an electronic device and a processing method integrated on a cover glass, which can integrate the whole wireless charging module on the cover glass to realize a wireless charging function, and the wireless charging is not affected when both the lens side surface and the screen side surface of the whole device contain metal devices. The specific scheme is as follows:

a wireless charging module integrated on cover glass, comprising:

a wireless coil located within the cover glass display area;

coil leads which are positioned in the silk-screen area of the cover glass surrounding the display area and connected with the wireless coils;

and the conductive adhesive is positioned on the coil lead.

Preferably, in the wireless charging module integrated on a cover glass provided in the embodiment of the present invention, the wireless charging module further includes:

and silver paste on the conductive adhesive.

Preferably, in the wireless charging module integrated on a cover glass provided by the embodiment of the present invention, the wireless coil is a loop coil;

the annular coil is made of indium tin oxide.

Preferably, in the wireless charging module integrated on cover glass provided by the embodiment of the present invention, a region in the silk-screen region except for a position where the coil lead is located has silk-screen ink;

the color of the silk-screen printing ink is the same as that of the conductive adhesive.

The embodiment of the invention also provides electronic equipment, which comprises a main board, cover glass, the wireless charging module integrated on the cover glass, a flexible circuit board and a screen, wherein the flexible circuit board is respectively and electrically connected with the main board and the wireless charging module; the screen is a screen integrated with touch functions.

Preferably, in the electronic device provided by the embodiment of the present invention, the wireless coil of the wireless charging module is located at a side of the cover glass close to the screen.

Preferably, in the electronic device provided by the embodiment of the present invention, the exposed copper of the flexible circuit board is bonded with silver paste of the wireless charging module.

The embodiment of the invention also provides a processing method of the wireless charging module integrated on the cover plate glass, which comprises the following steps:

simultaneously forming patterns of a wireless coil and a coil lead on the cover glass; the wireless coil is positioned in the cover plate glass display area; the coil lead is positioned in a silk-screen area of the cover glass surrounding the display area;

performing silk screen printing on the silk screen printing area, and avoiding the position of the coil lead wire during silk screen printing;

and forming conductive adhesive on the coil lead.

Preferably, in the above processing method provided by the embodiment of the present invention, forming a pattern of a wireless coil and a coil lead on the cover glass at the same time includes:

forming a layer of indium tin oxide film on the cover glass;

and patterning the indium tin oxide film to form patterns of the wireless coil and the coil lead simultaneously.

Preferably, in the above processing method provided by the embodiment of the present invention, after forming the conductive adhesive on the coil lead, the processing method further includes:

and coating silver paste on the conductive adhesive.

According to the technical scheme, the wireless charging module integrated on the cover plate glass provided by the invention comprises the following components: a wireless coil located within the cover glass display area; coil leads which are positioned in the silk-screen printing area of the display area surrounded by the cover glass and connected with the wireless coils; and the conductive adhesive is positioned on the coil lead.

According to the wireless charging module integrated on the cover plate glass, as the wireless coil of the wireless charging module is positioned in the display area of the cover plate glass, the coil lead is positioned in the screen printing area of the cover plate glass, and the conductive adhesive on the coil lead can be connected with other circuit boards to form a complete function, so that the whole wireless charging module can be integrated on the cover plate glass to realize the wireless charging function, and any device with metal materials can be arranged on the side surface of the lens and the side surface of the screen of the whole wireless charging module, the defect that one side of the traditional wireless charging device is a screen and the other side of the traditional wireless charging device is a nonmetal is overcome, and compared with the traditional wireless charging module, the thickness of the traditional wireless charging module is basically negligible, the thickness of a product is reduced, and the competitiveness is improved.

In addition, the invention also provides corresponding electronic equipment and a processing method for the wireless charging module integrated on the cover glass, so that the wireless charging module has higher practicability, and the electronic equipment and the processing method have corresponding advantages.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the related art, the drawings that are required to be used in the embodiments or the related technical descriptions will be briefly described, and it is apparent that the drawings in the following description are only embodiments of the present invention, and other drawings may be obtained according to the provided drawings without inventive effort for those skilled in the art.

FIG. 1 is a schematic diagram of a conventional apparatus having a lens with a metal-containing material on one side;

FIG. 2 is a schematic diagram of a conventional device having a touch screen with a metal-containing material on the other side;

FIG. 3 is a front view of a cover glass according to an embodiment of the present invention;

FIG. 4 is a side view of a cover glass provided by an embodiment of the present invention;

fig. 5 is a front view of a cover glass with a wireless coil and coil leads according to an embodiment of the present invention;

FIG. 6 is a front view of a cover glass having two hollow window regions provided in an embodiment of the present invention;

FIG. 7 is a side view of a cover glass having two hollow window regions provided in an embodiment of the present invention;

fig. 8 is an exploded view of an electronic device according to an embodiment of the present invention;

fig. 9 is a schematic structural diagram of a flexible circuit board according to an embodiment of the present invention;

FIG. 10 is a side view of a flexible circuit board and cover glass provided by an embodiment of the present invention;

FIG. 11 is a front view of a flexible circuit board and cover glass provided by an embodiment of the present invention;

fig. 12 is a conduction diagram of a flexible circuit board and a motherboard according to an embodiment of the present invention;

fig. 13 is a flowchart of a processing method of a wireless charging module according to an embodiment of the present invention;

wherein, 1, cover glass; 2. a flexible circuit board; 3. a main board; 4. a screen; 11. a display area; 12. a silk screen region; 13. a wireless coil; 131. a coil lead; 132. a transparent hollow window; 21. exposing copper; 31. a connector.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

The invention provides a wireless charging module integrated on cover glass, as shown in fig. 3 to 5, comprising:

a wireless coil 13 located within the display area 11 of the cover glass 1;

coil leads 131 which are located in the screen region 12 of the cover glass 1 surrounding the display region 11 and connected to the wireless coil 13;

and conductive paste on the coil leads 131.

In the wireless charging module integrated on the cover glass provided by the embodiment of the invention, because the wireless coil 13 of the wireless charging module is positioned in the display area 11 of the cover glass 1, the coil lead 131 is positioned in the screen printing area 12 of the cover glass 1, and the conductive adhesive on the coil lead 131 can be connected with other circuit boards to form a complete function, the whole wireless charging module can be integrated on the cover glass to realize the wireless charging function, and when the lens side surface and the screen side surface of the whole wireless charging module both contain devices made of metal materials, the wireless charging is not affected, the defect that one side of the traditional wireless charging equipment is a screen and the other side is a nonmetal is overcome, and compared with the traditional wireless charging module, the thickness of the traditional wireless charging module is basically negligible, the thickness of a product is reduced, and the competitiveness is improved.

It should be noted that the wireless charging module integrated on the cover glass provided by the embodiment of the invention can be applied to any equipment with a screen on one side and a metal material on the other side.

Preferably, the screen can select two modes, i.e. ONCELL (embedded) or incall (embedded), i.e. the touch function is integrated on the screen, so that the cover glass located at the outermost side has no touch function and only plays a role of protecting the screen.

In the present invention, as shown in fig. 3, the cover glass 1 is divided into two parts according to whether it is transparent, i.e., a display area 11 located at the center and transparent, and a silk-screen area 12 located at the outer ring and opaque. The display area 11 may correspond to a display area of a screen; the screen printed area 12 may be used to secure to the housing and act as a cloak.

In a specific implementation, in the wireless charging module integrated on the cover glass provided in the embodiment of the present invention, the wireless coil 13 may be designed as a loop coil; preferably, the material of the loop coil may be Indium Tin Oxide (ITO).

Specifically, before the opaque ink is screen printed in the screen printing region 12, the inner side of the cover glass 1 may be coated with an ITO thin film, that is, an indium tin oxide semiconductor transparent conductive film, having excellent conductivity and transparency, and then a desired pattern (for example, a loop coil) of the wireless coil 13 may be formed using a laser engraving or the like, and a desired film thickness and coil width may be prepared according to a desired power. When the wireless coil 13 is a loop coil, two coil lead 131 positions may be led out.

In a specific implementation, in the wireless charging module integrated on the cover glass provided in the embodiment of the present invention, the area except the position of the coil lead 131 in the silk-screen area 12 is provided with silk-screen ink. The screen ink ribbon is colored, preferably the screen ink and the conductive paste may be the same color.

Specifically, as shown in fig. 6, the positions of the two coil leads 131 are in opaque areas to be screen printed, and then screen printing is performed on the required whole screen printed area 12, so that the screen printing needs to avoid the positions of the two coil leads 131, and two transparent empty windows 132 are formed. As shown in fig. 7, conductive paste with the same color as that of silk screen is brushed on the positions of the two transparent hollow windows 132, so that the two transparent hollow windows 132 cannot be seen from the outside.

Further, in a specific implementation, in the wireless charging module integrated on a cover glass provided in the embodiment of the present invention, the wireless charging module may further include: silver paste on the conductive paste.

Specifically, the conductive adhesive is brushed with silver paste, and the conductive adhesive can be used for conducting a circuit. For example, the flexible circuit board is taken and melted by using a hot pressing process and the like, so that exposed copper on the flexible circuit board is bonded with the silver paste and conducted, namely, the flexible circuit board can be conducted with the whole wireless coil.

Based on the same inventive concept, the embodiment of the invention also provides an electronic device, and because the principle of solving the problem of the electronic device is similar to that of the wireless charging module integrated on the cover glass, the implementation of the electronic device can refer to the implementation of the wireless charging module integrated on the cover glass, and the repetition is omitted.

In specific implementation, as shown in fig. 8, the electronic device provided in the embodiment of the present invention specifically includes: the cover glass 1, the wireless charging module integrated on the cover glass 1, the main board 3, the flexible circuit board 2 respectively electrically connected with the main board 3 and the wireless charging module, and the screen 4 positioned between the main board 3 and the cover glass 1; the screen 4 is a screen integrated with a touch function.

According to the electronic equipment provided by the embodiment of the invention, the wireless charging function can be realized when the lens side surface and the screen side surface both contain devices made of metal, the defect that one surface of the traditional wireless charging equipment is a screen and the other surface of the traditional wireless charging equipment is a nonmetal is overcome, and compared with the traditional wireless charging module, the thickness of the traditional wireless charging equipment is basically negligible, the thickness of a product is reduced, and the competitiveness is improved.

It should be noted that, the touch function is integrated on the screen 4, so that the wireless charging module can be integrated on the cover glass 1, ITO is formed to have a required thickness and a required coil width according to the power requirement, and the display area and the silk screen area are consistent with the traditional equipment from the appearance, so that the display and touch functions are not affected; the energy is collected by the coil, is connected with the flexible circuit board 2 by conductive adhesive and silver paste, and is then conducted to the main board 3 to form a complete function.

In a specific implementation, in the electronic device provided by the embodiment of the present invention, the wireless coil of the wireless charging module may be located at a side of the cover glass close to the screen.

As shown in fig. 8, the ring coil formed of ITO is located inside the cover glass 1, i.e., near one side of the screen 4, so that the ITO cannot be damaged from the outside, and the coil is not blocked by the screen 4, and can receive electromagnetic waves, thereby realizing wireless power-on.

In a specific implementation, in the electronic device provided by the embodiment of the invention, the exposed copper of the flexible circuit board 2 is bonded with silver paste of the wireless charging module.

Specifically, as shown in fig. 9 to 11, the flexible circuit board 2 has two exposed copper 21 thereon. The exposed copper 21 of the flexible circuit board 2 is aligned with the hollow window area coated with silver paste on the cover glass 1, and the exposed copper and the hollow window area are fixed together by means of hot pressing and the like, and at the moment, the flexible circuit board 2 is conducted with the whole coil. As shown in fig. 12, the flexible circuit board 2 and the main board 3 may be connected by a connector 31 or other means such as soldering, and the entire circuit is conducted.

Based on the same inventive concept, the embodiment of the invention also provides a processing method of the wireless charging module integrated on the cover glass, and because the principle of solving the problem of the method is similar to that of the wireless charging module integrated on the cover glass, the implementation of the method can refer to the implementation of the wireless charging module integrated on the cover glass, and the repetition is omitted.

In specific implementation, the processing method of the wireless charging module integrated on the cover glass provided by the embodiment of the invention, as shown in fig. 13, includes:

s1301, simultaneously forming patterns of a wireless coil and a coil lead on cover glass; the wireless coil is positioned in the cover plate glass display area; the coil leads are located in a silk-screened area of the cover glass surrounding the display area.

In a specific implementation, step S1301 forms patterns of the wireless coil and the coil lead on the cover glass at the same time, and may specifically include: firstly, forming an ITO film on cover glass; then, patterning process is performed on the ITO film to simultaneously form patterns of the wireless coil and the coil lead.

Specifically, a layer of ITO film may be formed by first spreading ITO over the inner surface of the cover glass using a steel mesh or other printing process, and then removing the ITO except for the desired wireless coil and coil lead using a laser etching process or the like.

S1302, silk screen printing is carried out on the silk screen printing area, and the position of the coil lead wire is avoided during silk screen printing.

Specifically, the required silk-screen printing ink with color is used for silk-screen printing on the opaque silk-screen printing area of the outer ring, and the position of the coil lead wire is needed to be avoided during silk-screen printing, namely two transparent hollow windows are avoided, so that the hollow window area is still transparent.

S1303, forming conductive glue on the coil leads.

Specifically, the hollow window area can be fully coated with conductive adhesive with the same color as the silk-screen printing ink.

In the processing method provided by the embodiment of the invention, the whole wireless charging module can be integrated on the cover plate glass, so that the wireless charging function can be realized, wireless charging is not affected when the lens side surface and the screen side surface of the whole machine both contain devices made of metal materials, the defect that one surface of the traditional wireless charging equipment is a screen and the other surface is a nonmetal is overcome, the thickness of the whole wireless charging module is reduced, and the thickness is close to zero.

Further, in a specific implementation, in the above processing method provided by the embodiment of the present invention, after forming the conductive adhesive on the coil lead, the method may further include:

and 1304, coating silver paste on the conductive adhesive.

Specifically, after the conductive paste is coated with silver paste, the flexible circuit board can be taken to melt the silver paste by using a hot pressing process and the like, so that the frontal exposure copper on the flexible circuit board is adhered to and conducted with the silver paste.

In this specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, so that the same or similar parts between the embodiments are referred to each other.

In summary, the wireless charging module integrated on the cover glass provided by the embodiment of the invention comprises: a wireless coil located within the cover glass display area; coil leads which are positioned in the silk-screen printing area of the display area surrounded by the cover glass and connected with the wireless coils; and the conductive adhesive is positioned on the coil lead. Because the wireless coil of wireless charging module is located cover glass's display area, the coil lead wire is located cover glass's silk screen printing region, the conducting resin on the coil lead wire can link to each other with other circuit board, form complete function, make whole wireless charging module integration like this on cover glass can realize wireless charging function, lens side surface and screen side surface at the complete machine all can set up any device that has the metal material, the drawback that traditional wireless charging equipment one side is the screen, the other side must be non-metal has been solved, and compare traditional wireless charging module, thickness is basically negligible, the thickness of product has been reduced, competitiveness has been promoted. In addition, the invention also provides corresponding electronic equipment and a processing method for the wireless charging module integrated on the cover glass, so that the wireless charging module has higher practicability, and the electronic equipment and the processing method have corresponding advantages.

Finally, it is further noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

The wireless charging module integrated on the cover glass provided by the invention is described in detail, and specific examples are applied to illustrate the principle and the implementation of the invention, and the description of the examples is only used for helping to understand the method and the core idea of the invention; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in accordance with the ideas of the present invention, the present description should not be construed as limiting the present invention in view of the above.

Claims

1. A wireless charging module integrated on cover glass, comprising:

a wireless coil (13) positioned in the display area (11) of the cover glass (1);

a coil lead (131) which is located in a screen printing area (12) of the cover glass (1) surrounding the display area (11) and is connected with the wireless coil (13);

and conductive adhesive on the coil lead (131).

2. The wireless charging module integrated on a cover glass of claim 1, further comprising:

and silver paste on the conductive adhesive.

3. The wireless charging module integrated on a cover glass according to claim 2, characterized in that the wireless coil (13) is a toroidal coil;

the annular coil is made of indium tin oxide.

4. A wireless charging module integrated on a cover glass according to claim 3, characterized in that the area inside the screen-printed area (12) except the location of the coil leads (131) has screen-printed ink;

5. An electronic device, characterized by comprising a main board (3), a cover glass (1), the wireless charging module integrated on the cover glass according to any one of claims 1 to 4, a flexible circuit board (2) electrically connected to the main board (3) and the wireless charging module, respectively, and a screen (4) located between the main board (3) and the cover glass (1); the screen (4) is a screen integrated with a touch function.

6. The electronic device according to claim 5, characterized in that the wireless coil (13) of the wireless charging module is located at the side of the cover glass (1) close to the screen (4).

7. The electronic device according to claim 6, characterized in that the exposed copper (21) of the flexible circuit board (2) is glued together with the silver paste of the wireless charging module.

8. A method of manufacturing a wireless charging module integrated on a cover glass as claimed in any one of claims 1 to 4, comprising:

simultaneously forming patterns of a wireless coil (13) and a coil lead (131) on the cover glass (1); the wireless coil (13) is positioned in the display area (11) of the cover glass (1); the coil leads (131) are located in a silk-screen region (12) of the cover glass (1) surrounding the display region (11);

performing silk screen printing on the silk screen printing area (12), and avoiding the position of the coil lead (131) during silk screen printing;

and forming conductive adhesive on the coil lead (131).

9. The processing method according to claim 8, wherein simultaneously forming the patterns of the wireless coil (13) and the coil lead (131) on the cover glass (1) includes:

forming a layer of indium tin oxide film on the cover glass (1);

patterning the indium tin oxide film to form patterns of a wireless coil (13) and a coil lead (131) simultaneously.

10. The processing method according to claim 9, characterized by further comprising, after forming a conductive paste on the coil lead (131):

and coating silver paste on the conductive adhesive.