Display module with NFC antenna open circuit poor prevention structure

Abstract

The utility model relates to a display module with an NFC antenna open circuit poor prevention structure, which comprises a display screen, a display driving chip and a display screen FPC, the first end of the display driving chip is bound with the display screen, the second end of the display driving chip is bound with the display screen FPC, the display screen FPC is provided with a metal bonding pad used for setting NFC, and the metal bonding pad is provided with a metal bonding pad used for setting NFC. The display screen FPC is electrically connected with the NFC through the metal bonding pad; a PI reinforcing plate is arranged on the back face, used for arranging the metal bonding pad area, of the display screen FPC. According to the utility model, the PI reinforcing plate is additionally arranged on the back surface of the FPC matched with the NFC bonding pad, so that the NFC bonding pad is prevented from cracking in the bending process of the FPC, and the stability of the connection structure of the NFC antenna and the bonding pad is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of displays, in particular to a display module with a structure for preventing open - circuit defects of an NFC antenna. Background Art

[0002] Currently, many wearable devices such as watches and bracelets are equipped with built - in NFC antennas for paying fees, electronic tickets, or data exchange and collection with smart media. The conventional assembly scheme for a display module with an NFC antenna is to weld the NFC on the display screen FPC, and set the NFC antenna through pads. There is an electroplated copper layer on the back of the area of the display screen FPC for setting the NFC pads. When assembling the display module, the FPC is bent and stacked on the back of the display screen. During the bending process, due to inaccurate control of the bending radius, it is easy to cause the height of the two to be inconsistent after stacking, that is, there is no good alignment, and it is necessary to unfold and readjust the bending radius. Each time it is unfolded, it is necessary to lift the stacked display screen FPC by holding the copper layer. Due to reasons such as material and thickness, the electroplated copper layer is prone to breakage, resulting in damage and cracking of the NFC pads on its back, causing functional defects such as antenna open - circuit. Content of the Utility Model

[0003] Aiming at the deficiencies of the prior art, the utility model provides a display module with a structure for preventing open - circuit defects of an NFC antenna, aiming to improve the stability of the connection structure between the NFC antenna and the pads.

[0004] The technical scheme adopted by the utility model is as follows:

[0005] A display module with a structure for preventing open - circuit defects of an NFC antenna includes a display screen, a display driving chip, and a display screen FPC. The first end of the display driving chip is bonded to the display screen, the second end of the display driving chip is bonded to the display screen FPC, and the display screen FPC is provided with metal pads for setting the NFC. The display screen FPC is electrically connected to the NFC through the metal pads; there is a PI reinforcing plate on the back of the area of the display screen FPC for setting the metal pads.

[0006] The further technical scheme is:

[0007] The PI reinforcing plate is a double - sided adhesive PI reinforcing plate with a length of 2.5 mm, a width of 2.71 mm, and a thickness of 0.1 mm.

[0008] After the PI reinforcing plate is attached to the display screen FPC, it is die - cut together with the display screen FPC.

[0009] The metal pads include two, and the two metal pads are arranged side by side at intervals.

[0010] The display screen FPC is of a T - shaped structure.

[0011] The metal pad is disposed at a corner of the upper segment of the T-shaped structure.

[0012] A BTB connector is provided at the end of the lower segment of the T-shaped structure.

[0013] The first end of the display driving chip is connected to the lower end of the display screen, and the second end of the display driving chip is connected to the display screen FPC through a conductive adhesive.

[0014] The display driving chip is packaged by a COF process.

[0015] The display screen is an AMOLED or TFT display screen.

[0016] The beneficial effects of the present utility model are as follows:

[0017] By adding a PI reinforcement plate to the back of the FPC that matches the NFC pad, the structural strength of the FPC is increased, cracking of the NFC pad during the bending process of the FPC is avoided, the stability of the NFC antenna and pad connection structure is improved, and functional defects such as NFC antenna open circuit are effectively prevented.

[0018] Other features and advantages of the present utility model will be described in the subsequent description, and some of them will be obvious from the description or understood by implementing the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the front flat structure of the embodiment of the present utility model.

[0020] Figure 2 It is a schematic diagram of the back flat structure of the embodiment of the present utility model.

[0021] In the figure: 1, display screen; 2, BTB connector; 3, display driving chip; 4, display screen FPC; 5, PI reinforcement plate; 6, steel sheet reinforcement plate; 7, metal pad; 8, protective foam; 31, first end; 32, second end. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] The following describes the specific embodiments of the present utility model with reference to the accompanying drawings.

[0023] See Figure 1 and Figure 2, A display module with a structure to prevent NFC antenna open - circuit defects in this embodiment includes a display screen 1, a display driver chip 3, and a display screen FPC (flexible printed circuit board) 4. The first end 31 of the display driver chip 3 is bonded to the display screen 1, and the second end 32 of the display driver chip 3 is bonded to the display screen FPC 4. A metal pad 7 for setting an NFC (Near - Field Communication) antenna is provided on the display screen FPC 4, and the display screen FPC 4 is electrically connected to the NFC antenna through the metal pad 7; a PI (Polymide) reinforcement plate 5 is provided on the back of the area of the display screen FPC 4 for setting the metal pad 7.

[0024] The PI reinforcement plate is a reinforcement plate made of the high - temperature - resistant and flexible organic polymer material polyimide.

[0025] In this embodiment, by setting a PI reinforcement plate on the back of the area of the metal pad 7 on the display screen FPC 4, the thickness and strength of the metal pad area of the display screen FPC are increased. It avoids the cracking of the NFC pad during multiple bending processes of the FPC, and improves the connection stability between the pad and the NFC.

[0026] Specifically, the PI reinforcement plate 5 is an adhesive reinforcement plate with a length of 2.5 mm, a width of 2.71 mm, and a thickness of 0.1 mm.

[0027] Specifically, after the PI reinforcement plate 5 is attached to the display screen FPC 4, it is die - cut together with the display screen FPC 4.

[0028] Specifically, there are two metal pads 7, and the two metal pads 7 are arranged side by side at intervals.

[0029] Specifically, the display screen FPC 4 is of a T - shaped structure, and the metal pad 7 is arranged at a corner of the upper section of the T - shaped structure. A BTB connector 2 is provided at the end of the lower section of the T - shaped structure for connecting to the system main board. As a specific implementation, a steel sheet reinforcement plate 6 is provided on the back of the area of the display screen FPC 4 corresponding to the BTB connector 2.

[0030] Specifically, the first end 31 of the display driver chip 3 is connected to the lower end of the display screen 1, and the second end 32 of the display driver chip 3 is connected to the display screen FPC 4 through conductive adhesive.

[0031] Specifically, the display driver chip 3 is packaged using the COF process.

[0032] Specifically, the display screen is an AMOLED (Active - Matrix Organic Light - Emitting Diode panel) or TFT (Thin - Film Transistor) display screen.

[0033] During the assembly process of this embodiment, along Figure 2In the first end 31, the display FPC 4 is folded upward so that the NFC antenna provided on the metal pad 7 is stacked at the upper left corner of the protective foam on the back of the display 1. At this time, the PI reinforcing plate is located on the surface of the stacked structure. If the bending radius is not adjusted properly and the stacking is not in place, hold the PI reinforcing plate and lift the display FPC 4 from the display 1, and then readjust the bending radius for bending. Since the PI reinforcing plate is relatively thick and has good strength, during the lifting process, the display FPC 4 can be prevented from being pulled, thereby avoiding cracking of the pad folding, and further improving the connection stability between the pad and the NFC.

[0034] Those of ordinary skill in the art can understand that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A display module with a structure for preventing NFC antenna open circuit failure, characterized in that: It includes a display screen, a display driver chip, and a display screen FPC. The first end of the display driver chip is bound to the display screen, and the second end of the display driver chip is bound to the display screen FPC. The display screen FPC is provided with a metal pad for setting an NFC antenna, and the display screen FPC is electrically connected to the NFC antenna through the metal pad; a PI reinforcement plate is provided on the back side of the display screen FPC for setting the metal pad area.

2. The display module with a structure for preventing NFC antenna open circuit failure according to claim 1, characterized in that: The PI reinforcing plate is a PI reinforcing plate with glue and has a length of 2.5 mm, a width of 2.71 mm, and a thickness of 0.1 mm.

3. The display module with a structure for preventing NFC antenna open circuit failure according to claim 2, characterized in that: The PI reinforcing plate is attached to the display screen FPC and then punched and formed together with the display screen FPC.

4. The display module with a structure for preventing NFC antenna open circuit failure according to claim 1, characterized in that: The metal pads include two, and the two metal pads are arranged in parallel with an interval.

5. The display module with a structure for preventing NFC antenna open circuit failure according to claim 1, characterized in that: The display screen FPC is a T-shaped structure.

6. The display module with a structure for preventing NFC antenna open circuit failure according to claim 5, characterized in that: The metal pad is arranged at a corner of the upper section of the T-shaped structure.

7. The display module with a structure for preventing NFC antenna open circuit failure according to claim 5, characterized in that: A BTB connector is provided at the end of the lower section of the T-shaped structure.

8. The display module with a structure for preventing NFC antenna open circuit failure according to claim 1, characterized in that: The first end of the display driver chip is connected to the lower end of the display screen, and the second end of the display driver chip is connected to the display screen FPC through a conductive adhesive.

9. The display module with a structure for preventing NFC antenna open circuit failure according to claim 1, characterized in that: The display driver chip is packaged using the COF process.

10. The display module with a structure for preventing NFC antenna open circuit failure according to claim 1, characterized in that: The display screen is an AMOLED or TFT display screen.

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