A structure for improving the reliability of display module

Abstract

A structure for improving the reliability of a display module, comprising: a backlight assembly, a display FPC, and a backlight FPC; the top of the backlight assembly is provided with a lower polarizer, a lower glass, an upper glass, and an upper polarizer; the bottom of the backlight assembly is provided with a double-sided conductive copper foil, the bottom of the double-sided conductive copper foil is provided with a single-layer graphite sheet, the bottom of the single-layer graphite sheet is provided with a PCM heat storage gasket, and the bottom of the PCM heat storage gasket is provided with a conductive double-sided adhesive; the right side of the backlight assembly is connected to the backlight FPC. The utility model has a structure for improving the reliability of a display module, by attaching a heat storage gasket to the outermost layer, and cooperating with a local PI window opening on the display FPC to expose copper, the heat on the backlight module can be exported to the metal casing of the whole machine through the exposed copper area on the FPC, and dissipated, further improving the heat dissipation efficiency and reliability of the product.

Description

Technical Field

[0001] The utility model relates to the technical field of display modules, and in particular to a structure for improving the reliability of display modules. Background Art

[0002] With the advancement of technology, smart wearable devices such as bracelets or watches for monitoring personal health data are becoming more and more common. Among them, outdoor sports watches are mainly used outdoors and are affected by strong external light. Usually, the brightness of the display needs to be adjusted to a higher level to see the information on the watch clearly. The brightness is about 800-1000nits. Therefore, when used for a long time, the backlight components on the module and the boost circuit on the watch motherboard will heat up seriously. In order to prevent the display module from working for a long time under high temperature and accelerate product aging, it is necessary to optimize the heat dissipation of the product to improve its reliability. Utility Model Content

[0003] The purpose of the utility model is to overcome the shortcomings of the prior art and provide a structure that improves the reliability of a display module.

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

[0005] A structure for improving the reliability of a display module comprises: a backlight assembly, a display FPC, and a backlight FPC; a lower polarizer, a lower glass, an upper glass, and an upper polarizer are arranged on the top of the backlight assembly; a double-sided conductive copper foil is arranged on the bottom of the backlight assembly, a single-layer graphite sheet is arranged on the bottom of the double-sided conductive copper foil, a PCM heat storage pad is arranged on the bottom of the single-layer graphite sheet, and a conductive double-sided adhesive is arranged on the bottom of the PCM heat storage pad; the right sides of the lower glass and the upper glass are connected to the display FPC; the right side of the backlight assembly is connected to the backlight FPC.

[0006] In one of the embodiments, the lower polarizer, the lower glass, the upper glass, and the upper polarizer are stacked in this order on top of the backlight assembly.

[0007] In one of the embodiments, a display IC is disposed on the display FPC near the connection between the lower glass and the upper glass.

[0008] In one of the embodiments, a FPC copper leakage area is arranged on a side of the display FPC close to the backlight assembly, and a ZIF connector is arranged on the bottom of the tail of the display FPC.

[0009] In one of the embodiments, the shape and size of the FPC copper leakage area are matched with the shape and size of the conductive double-sided adhesive, and the position of the conductive double-sided adhesive corresponds to the position of the FPC copper leakage area.

[0010] In one of the embodiments, the conductive double-sided adhesive is arranged on the back center of the PCM heat storage gasket close to the display FPC.

[0011] In one embodiment, the thickness of the conductive double-sided adhesive is 0.05 mm, the thickness of the single-layer graphite sheet is 0.05 mm, and the thickness of the double-sided conductive copper foil is also 0.05 mm.

[0012] In one of the embodiments, the shape and size of the side surface of the double-sided conductive copper foil are matched with the shape and size of the side surface of the backlight assembly.

[0013] In one embodiment, the shape and size of the side surface of the single-layer graphite sheet are matched with the shape and size of the side surface of the double-sided conductive copper foil.

[0014] In one of the embodiments, the backlight FPC and the backlight assembly are connected to each other via a metal PIN, and the lower glass, the upper glass and the display FPC are also connected to each other via a metal PIN.

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

[0016] The utility model has a structure for improving the reliability of the display module, by attaching a copper foil to the back of the backlight component, attaching a graphite sheet on the copper foil, and attaching a heat storage pad on the outermost layer, which is used to absorb the heat generated by the backlight module and the watch mainboard boost circuit when working, and at the same time, a local PI window is opened on the display FPC to expose the copper, and after the display FPC is bent, the exposed copper area is connected to the backlight component through a conductive double-sided adhesive, and the heat on the backlight module can be exported through the exposed copper area on the FPC to the metal casing of the whole machine for dissipation, thereby further improving the heat dissipation efficiency and reliability of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 A schematic diagram of stacking the structure for improving the reliability of the display module of the utility model;

[0019] Figure 2 The back of the backlight assembly is an overall schematic diagram of the structure for improving the reliability of the display module according to the utility model.

[0020] In the figure: 1. Backlight assembly; 11. Lower polarizer; 12. Lower glass; 13. Upper glass; 14. Upper polarizer; 15. Double-sided conductive copper foil; 16. Single-layer graphite sheet; 17. PCM heat storage pad; 18. Conductive double-sided adhesive; 2. Display FPC; 21. FPC copper leakage area; 22. ZIF connector; 3. Backlight FPC. DETAILED DESCRIPTION

[0021] 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.

[0022] 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.

[0023] 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.

[0024] 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.

[0025] like Figure 1-2As shown, a structure for improving the reliability of a display module comprises: a backlight assembly 1, a display FPC 2 and a backlight FPC 3; a lower polarizer 11, a lower glass 12, an upper glass 13 and an upper polarizer 14 are arranged on the top of the backlight assembly 1; a double-sided conductive copper foil 15 is arranged on the bottom of the backlight assembly 1, a single-layer graphite sheet 16 is arranged on the bottom of the double-sided conductive copper foil 15, a PCM heat storage gasket 17 is arranged on the bottom of the single-layer graphite sheet 16, and a conductive double-sided adhesive 18 is arranged on the bottom of the PCM heat storage gasket 17; the right sides of the lower glass 12 and the upper glass 13 are connected to the display FPC 2; the right side of the backlight assembly 1 is connected to the backlight FPC 3. It should be noted that the display FPC2 and the backlight FPC3 are both flexible circuit boards, which need to be bent to the back of the backlight assembly 1 during finished product assembly, so that the FPC copper leakage area 21 and the conductive double-sided adhesive 18 are connected to each other, while other parts of the display FPC2 are bonded to the PCM heat storage pad 17 to form heat transfer and conduction, thereby improving the heat dissipation efficiency and reliability of the product.

[0026] like Figure 1-2 As shown, in one embodiment, the lower polarizer 11, the lower glass 12, the upper glass 13, and the upper polarizer 14 are stacked in this order on the top of the backlight assembly 1. It should be noted that the lower polarizer 11 and the backlight assembly 1 are bonded together by transparent optical adhesive.

[0027] like Figure 1-2 As shown in one embodiment, a display IC is arranged near the connection between the lower glass 12 and the upper glass 13 of the display FPC 2. It should be noted that the display IC is a display screen driving IC.

[0028] like Figure 1-2 As shown, in one embodiment, a FPC copper leakage area 21 is provided on the side of the display FPC2 close to the backlight assembly 1, and a ZIF connector 22 is provided on the bottom of the tail of the display FPC2. It should be noted that the ZIF connector 22 is provided with a PI reinforcing plate at the position corresponding to the back of the display FPC2.

[0029] like Figure 1-2 As shown, in one embodiment, the shape and size of the FPC copper leakage area 21 are matched with the shape and size of the conductive double-sided adhesive 18, and the position of the conductive double-sided adhesive 18 corresponds to the position of the FPC copper leakage area 21. It should be noted that the conductive double-sided adhesive 18 is arranged on the side of the back center of the PCM heat storage gasket 17 close to the display FPC2. When the display FPC2 is bent to the back of the backlight assembly 1, the FPC copper leakage area 21 and the conductive double-sided adhesive 18 can be connected together, and the PCM heat storage gasket 17 can also be attached to the display FPC2, so that the heat on the backlight assembly 1 can be conducted through the copper exposed area on the FPC to the metal casing of the whole machine for dissipation.

[0030] like Figure 1-2 As shown, in one embodiment, the thickness of the conductive double-sided adhesive 18 is 0.05 mm, the thickness of the single-layer graphite sheet 16 is 0.05 mm, and the thickness of the double-sided conductive copper foil 15 is also 0.05 mm.

[0031] like Figure 1-2 As shown, in one embodiment, the shape and size of the side of the double-sided conductive copper foil 15 are matched with the shape and size of the side of the backlight assembly 1. The shape and size of the side of the single-layer graphite sheet 16 are matched with the shape and size of the side of the double-sided conductive copper foil 15. It should be noted that the PCM heat storage gasket 17 is attached to the single-layer graphite sheet 16, and the PCM heat storage gasket 17 avoids the conductive double-sided adhesive 18 and only covers the top, center and bottom right positions of the single-layer graphite sheet 16.

[0032] like Figure 1-2 As shown, in one embodiment, the backlight FPC3 and the backlight assembly 1 are connected to each other through a metal PIN, and the lower glass 12 and the upper glass 13 are also connected to the display FPC2 through a metal PIN. It should be noted that the connection between the backlight FPC3 and the backlight assembly 1 is dotted with reinforcing glue, and the connection between the lower glass 12 and the upper glass 13 and the display FPC2 is also dotted with reinforcing glue.

[0033] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A structure for improving the reliability of a display module, characterized in that: include: Backlight assembly (1), display FPC (2), backlight FPC (3); The top of the backlight assembly (1) is provided with a lower polarizer (11), a lower glass (12), an upper glass (13), and an upper polarizer (14); A double-sided conductive copper foil (15) is arranged at the bottom of the backlight assembly (1), a single-layer graphite sheet (16) is arranged at the bottom of the double-sided conductive copper foil (15), a PCM heat storage pad (17) is arranged at the bottom of the single-layer graphite sheet (16), and a conductive double-sided adhesive (18) is arranged at the bottom of the PCM heat storage pad (17); The right sides of the lower glass (12) and the upper glass (13) are connected to the display FPC (2); The right side of the backlight assembly (1) is connected to the backlight FPC (3).

2. The structure for improving the reliability of a display module according to claim 1, characterized in that: The lower polarizer (11), the lower glass (12), the upper glass (13), and the upper polarizer (14) are stacked in this order on the top of the backlight assembly (1).

3. The structure for improving the reliability of a display module according to claim 1, characterized in that: The display FPC (2) is provided with a display IC near the connection between the lower glass (12) and the upper glass (13).

4. The structure for improving the reliability of a display module according to claim 1, characterized in that: A FPC copper leakage area (21) is arranged on a side of the display FPC (2) close to the backlight assembly (1), and a ZIF connector (22) is arranged on the bottom of the tail of the display FPC (2).

5. The structure for improving the reliability of a display module according to claim 4, characterized in that: The shape and size of the FPC copper leakage area (21) are compatible with the shape and size of the conductive double-sided adhesive (18), and the position of the conductive double-sided adhesive (18) corresponds to the position of the FPC copper leakage area (21).

6. The structure for improving the reliability of a display module according to claim 1, characterized in that: The conductive double-sided adhesive (18) is arranged at the center of the back of the PCM heat storage pad (17) and close to the display FPC (2).

7. The structure for improving the reliability of a display module according to claim 1, characterized in that: The thickness of the conductive double-sided adhesive (18) is 0.05 mm, the thickness of the single-layer graphite sheet (16) is 0.05 mm, and the thickness of the double-sided conductive copper foil (15) is also 0.05 mm.

8. The structure for improving the reliability of a display module according to claim 1, characterized in that: The shape and size of the side surface of the double-sided conductive copper foil (15) are compatible with the shape and size of the side surface of the backlight assembly (1).

9. The structure for improving the reliability of a display module according to claim 1, characterized in that: The shape and size of the side surface of the single-layer graphite sheet (16) are compatible with the shape and size of the side surface of the double-sided conductive copper foil (15).

10. The structure for improving the reliability of a display module according to claim 1, characterized in that: The backlight FPC (3) and the backlight assembly (1) are connected to each other via a metal PIN, and the lower glass (12) and the upper glass (13) and the display FPC (2) are also connected to each other via a metal PIN.

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