Structure capable of reducing electromagnetic interference of display module

Abstract

A structure capable of reducing electromagnetic interference of a display module comprises a glass cover plate, a display screen, a display FPC, a touch FPC and a COF package. The left side of the bottom of the front face of the display FPC is provided with an FPC copper exposing area. Composite conductive cloth is arranged on the FPC copper exposing area, and a COF package is arranged at the bottom of the composite conductive cloth. According to the structure capable of reducing the electromagnetic interference of the display module, the composite conductive cloth is attached to the COF package of the display screen, and the FPC copper exposing area arranged on the display FPC is also covered by the conductive cloth, so that the interference of a driving chip on the display module and the display FPC on signals such as an antenna on a wearable product when the driving chip and the display FPC work can be shielded; therefore, the electromagnetic interference in the display module can be reduced, and the competitiveness of the display module is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of display modules, in particular to a structure capable of reducing electromagnetic interference of display modules. Background Art

[0002] With the advancement of technology and the improvement of living standards, smart wearable devices such as bracelets or watches are becoming more and more common, and the functions integrated in the products are becoming more and more comprehensive. More and more wearable devices such as watches and bracelets have built-in NFC antennas for mobile payments, identity authentication, or data exchange and collection with smart media. However, when the boost circuit of the display's driver chip works in the high frequency band, the electromagnetic waves generated will interfere with the normal operation of the NFC antenna and affect the stability of NFC communication. Utility Model Content

[0003] The purpose of the utility model is to overcome the shortcomings of the prior art and provide a structure that can reduce the electromagnetic interference of a display module.

[0004] The purpose of this utility model is achieved through the following technical solutions:

[0005] A structure capable of reducing electromagnetic interference of a display module comprises: a glass cover plate, a display screen, a display FPC, a touch FPC and a COF package; the display screen is arranged at the center of the back of the glass cover plate, an NFC antenna is arranged on the display screen, the display FPC is arranged at the back of the display screen, the touch FPC is arranged at the center of the top of the display screen, an FPC copper-exposed area is arranged on the left side of the bottom of the front side of the display FPC; a composite conductive cloth is arranged on the FPC copper-exposed area, and a COF package is arranged at the bottom of the composite conductive cloth.

[0006] In one of the embodiments, the composite conductive cloth includes a conductive double-sided adhesive tape and a protective film, the COF package is arranged at the bottom of the protective film, and the conductive double-sided adhesive tape is interconnected with the FPC copper exposed area.

[0007] In one of the embodiments, the shape and size of the front side of the display screen match the shape and size of the front side of the glass cover plate, and one end of the display screen is bound to the COF package.

[0008] In one of the embodiments, the COF package is located on the left side of the bottom of the display FPC, and the COF package is electrically connected to the display FPC through ACF binding.

[0009] In one embodiment, the size of the front side of the composite conductive cloth is larger than the COF package, and the composite conductive cloth wraps the entire COF package and the FPC copper exposed area.

[0010] In one embodiment, the protective film is insulating paper, and the thickness of the protective film is 0.03 mm.

[0011] In one embodiment, the thickness of the conductive double-sided tape is 0.04 mm.

[0012] In one embodiment, the shape of the bottom of the front side of the composite conductive cloth is a "pin" shape, and the top of the front side of the composite conductive cloth is designed in a stepped manner with the left side higher than the right side.

[0013] In one embodiment, a ZIF connector is provided on the right side of the bottom of the front side of the touch FPC, and the ZIF connector is interconnected with the display FPC.

[0014] In one embodiment, an NFC antenna is provided on the display screen. The NFC antenna surrounds the edge of the display screen and is interconnected with the display FPC.

[0015] Compared with the prior art, the present utility model has at least the following advantages:

[0016] The structure of the present utility model that can reduce the electromagnetic interference of the display module. By attaching a composite conductive cloth to the COF package of the display screen, and the FPC copper exposure area opened on the display FPC is also covered by the conductive cloth, so as to shield the interference of the driving chip and the display FPC on the display module to signals such as the antenna on the wearable product. Therefore, the electromagnetic interference in the display module can be reduced, and the competitiveness of its products can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for the embodiments. It should be understood that the following drawings only show some embodiments of the present utility model, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0018] Figure 1 It is a front overall schematic diagram of the structure of the present utility model that can reduce the electromagnetic interference of the display module;

[0019] Figure 2 It is a front schematic diagram of the composite conductive cloth of the structure of the present utility model that can reduce the electromagnetic interference of the display module;

[0020] Figure 3 It is a side stacking schematic diagram of the composite conductive cloth of the structure of the present utility model that can reduce the electromagnetic interference of the display module.

[0021] In the figure: 1. Glass cover; 11. Display screen; 12. Display FPC; 13. NFC antenna; 14. Touch FPC; 15. ZIF connector; 16. FPC exposed copper area; 17. Composite conductive fabric; 171. Conductive double-sided tape; 172. Protective film; 18. COF packaging. DETAILED DESCRIPTION

[0022] In order to facilitate the understanding of the present invention, the present invention will be described more comprehensively with reference to the relevant drawings. The drawings provide preferred embodiments of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thoroughly and comprehensively understood.

[0023] In the description of the present application, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0024] Unless otherwise clearly stipulated and limited, terms such as "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0026] like Figure 1-3As shown, a structure capable of reducing electromagnetic interference of a display module comprises: a glass cover plate 1, a display screen 11, a display FPC 12, a touch FPC 14 and a COF package 18; the display screen 11 is arranged at the center of the back of the glass cover plate 1, the display FPC 12 is arranged at the back of the display screen (11), the touch FPC 14 is arranged at the center of the top of the display screen 11, and an FPC copper-exposed area 16 is arranged at the left side of the bottom of the front of the display FPC 12; a composite conductive cloth 17 is arranged on the FPC copper-exposed area 16, and a COF package 18 is arranged at the bottom of the composite conductive cloth 17. It should be noted that the block body on the left side of the front of the display FPC 12 is located in the display screen 11, and the block body on the right side extends to the outside of the display screen 11, and the display FPC 12 is a flexible circuit board, and the block body on the right side can be bent onto the block body on the left side, thereby reducing the area occupied by it.

[0027] like Figure 1-3 As shown, in one embodiment, the composite conductive cloth 17 includes a conductive double-sided adhesive tape 171 and a protective film 172, the COF package 18 is arranged at the bottom of the protective film 172, and the conductive double-sided adhesive tape 171 is connected to the FPC copper exposed area 16. It should be noted that the composite conductive cloth 17 is connected to the FPC copper exposed area 16PAD, which is equivalent to the grounding treatment of the conductive cloth, effectively shielding the interference of the driver chip on the display module to the antenna and other signals on the display module when the display module is working.

[0028] like Figure 1-3 As shown, in one embodiment, the shape and size of the front of the display screen 11 match the shape and size of the front of the glass cover 1, and one end of the display screen 11 is bound to the COF package 18. It should be noted that the display screen 11 and the display FPC 12 are electrically connected to each other.

[0029] like Figure 1-3 As shown, in one embodiment, the COF package 18 is located on the left side of the bottom of the display FPC 12, and the COF package 18 and the display FPC 12 are electrically connected through ACF binding. It should be noted that the FPC copper exposed area 16 is located on the left side of the top of the COF package 18.

[0030] like Figure 1-3 As shown, in one embodiment, the front side of the composite conductive fabric 17 is larger than the COF package 18, and the composite conductive fabric 17 wraps the entire COF package 18 and the FPC copper exposed area 16. It should be noted that this design can shield the electromagnetic interference generated by the COF chip in the COF package 18.

[0031] like Figure 1-3 As shown, in one embodiment, the protective film 172 is insulating paper, and the thickness of the protective film 172 is 0.03 mm. The thickness of the conductive double-sided adhesive 171 is 0.04 mm.

[0032] like Figure 1-3 As shown, in one embodiment, the shape of the bottom of the front side of the composite conductive cloth 17 is in the shape of a Chinese character "pin", and the top of the front side of the composite conductive cloth 17 is designed in a stepped manner with the left side higher than the right side. It should be noted that this design enables the composite conductive cloth 17 to wrap the COF package 18 and the exposed copper area 16 of the FPC while not affecting the normal operation of other electronic components.

[0033] As Figure 1-3 shown, in one embodiment, a ZIF connector 15 is provided on the right side of the bottom of the front side of the touch FPC 14, and the ZIF connector 15 is interconnected with the display FPC 12. It should be noted that this design enables the display screen 11 to have a touch function.

[0034] As Figure 1-3 shown, in one embodiment, an NFC antenna 13 is provided on the display screen 11. The NFC antenna 13 surrounds the edge of the display screen 11 and is interconnected with the display FPC 12. It should be noted that this design enables the display module to have functions such as mobile payment, identity authentication, or data exchange and collection with intelligent media.

[0035] The above-described embodiments only represent several implementation manners of the present utility model. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the utility model patent. It should be pointed out that for those of ordinary skill in the art, without departing from the concept of the present utility model, several modifications and improvements can still be made, and these all belong to the protection scope of the present utility model. Therefore, the protection scope of the utility model patent shall be subject to the appended claims.

Claims

1. A structure capable of reducing electromagnetic interference of a display module, characterized in that: Including: A glass cover plate (1), a display screen (11), a display FPC (12), a touch FPC (14), and a COF package (18); The display screen (11) is arranged at the center of the back of the glass cover plate (1), the display FPC (12) is arranged at the back of the display screen (11), the touch FPC (14) is arranged at the center of the top of the display screen (11), and a FPC copper exposed area (16) is arranged on the left side of the bottom of the front of the display FPC (12); A composite conductive cloth (17) is arranged on the FPC copper exposed area (16), and a COF package (18) is arranged at the bottom of the composite conductive cloth (17).

2. The structure capable of reducing electromagnetic interference of a display module according to claim 1, characterized in that: The composite conductive cloth (17) includes a conductive double-sided adhesive (171) and a protective film (172), the COF package (18) is arranged at the bottom of the protective film (172), and the conductive double-sided adhesive (171) is connected to the FPC copper exposed area (16).

3. The structure capable of reducing electromagnetic interference of a display module according to claim 1, characterized in that: The shape and size of the front of the display screen (11) match the shape and size of the front of the glass cover plate (1), and one end of the display screen (11) is bound to the COF package (18).

4. The structure capable of reducing electromagnetic interference of a display module according to claim 1, characterized in that: The COF package (18) is located on the left side of the bottom of the display FPC (12), and the COF package (18) and the display FPC (12) are electrically connected by ACF bonding.

5. The structure capable of reducing electromagnetic interference of a display module according to claim 1, characterized in that: The size of the front of the composite conductive cloth (17) is larger than that of the COF package (18), and the composite conductive cloth (17) wraps the entire COF package (18) and the FPC copper exposed area (16).

6. The structure capable of reducing electromagnetic interference of a display module according to claim 2, characterized in that: The protective film (172) is an insulating paper, and the thickness of the protective film (172) is 0.03 mm.

7. The structure capable of reducing electromagnetic interference of a display module according to claim 2, characterized in that: The thickness of the conductive double-sided adhesive (171) is 0.04 mm.

8. The structure capable of reducing electromagnetic interference of a display module according to claim 1, characterized in that: The shape of the bottom of the front of the composite conductive cloth (17) is in the shape of a "pin" character, and the top of the front of the composite conductive cloth (17) is designed in a stepped manner with the left side higher than the right side.

9. The structure capable of reducing electromagnetic interference of a display module according to claim 1, characterized in that: A ZIF connector (15) is arranged on the right side of the bottom of the front of the touch FPC (14), and the ZIF connector (15) is connected to the display FPC (12).

10. The structure capable of reducing electromagnetic interference of a display module according to claim 1, characterized in that: An NFC antenna (13) is arranged on the display screen (11), the NFC antenna (13) surrounds the edge of the display screen (11), and is connected to the display FPC (12).

Images