Display module

Abstract

The utility model discloses a display module, which relates to the field of display modules, and comprises a backlight rubber frame, a display screen and a PCB (Printed Circuit Board), the display screen is arranged on two surfaces of the backlight rubber frame, the display screen is connected with a main screen FPC (Flexible Printed Circuit), the main screen FPC is provided with a backlight FPC, the backlight FPC and the main screen FPC are bent and then electrically connected with the PCB to form a welding area, the PCB is provided with an element area and a connector, and the element area is connected with the connector. The surface of the PCB is provided with a first sealant, and the first sealant covers a component area, a connector and a welding area on the PCB; according to the utility model, the PCB is sealed by the first sealant, so that the component area, the connector and the welding area on the PCB are sealed by the sealant, degumming can be avoided, the components, the connector and the bonding pad are effectively protected, the first sealant can play a buffering role in collision, the anti-collision performance is improved, and the service life of the PCB is prolonged. Therefore, the high protection requirements of water resistance, collision resistance and pad oxidation resistance of the display module are met, the electrical connection stability of the display module is improved, and the service life of the display module is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of display modules, and particularly relates to a display module. Background Art

[0002] A display module (LCD Module), namely a liquid crystal display module, refers to a component assembled by a liquid crystal display device, connectors, peripheral circuits such as control and drive, a PCB circuit board, a backlight, a structural member, etc. Display modules are widely used in various electronic devices, such as mobile phones, tablet computers, televisions, computer monitors, in-vehicle display screens, etc. With the continuous development of technology, the performance and functions of display modules are also constantly improving and innovating.

[0003] Generally, the components and pads of a display module are reserved outside the module. For some high - requirement projects, such as waterproof performance, it is difficult to meet the usage requirements. Patent Application No. 201810054791.4 discloses a circuit board assembly, a display screen and an electronic device. The circuit board assembly includes a circuit board and a plurality of components arranged on the circuit board. A waterproof sealant is arranged around the plurality of components. The waterproof sealant has an opening, and a waterproof plate is arranged at the opening of the waterproof sealant. In this solution, by setting the waterproof sealant and the waterproof plate on the circuit board assembly, it can be ensured that liquid will not penetrate into the vertical direction of the plurality of components. There is a waterproof sealant in the horizontal direction. The waterproof sealant combined with the waterproof plate can ensure the waterproof effect of the components, and can well limit the overall height, and is not easy to affect the thin - and - light requirements of electronic devices. Through this technical solution, the waterproof effect of electronic devices can be improved to meet the waterproof requirements of users. However, this structure is prone to de - bonding, resulting in poor sealing between the waterproof sealant and the waterproof plate, and does not protect the internal components. When encountering collisions, the components are easily damaged, and the anti - collision performance is poor. The pad position is also prone to oxidation, reducing the electrical connection performance. Therefore, the utility model discloses a display module to solve the above problems. Summary of the Utility Model

[0004] Based on this, in view of the above - mentioned technical problems, it is necessary to provide a display module. By sealing the PCB board with a first sealant, the component area, connector and welding area on the PCB board are sealed with glue, which can avoid de - bonding, effectively protect the components, connectors and pads. When encountering impacts, the first sealant can play a buffering role, improving the anti - collision performance, thereby realizing the high - protection requirements of waterproof, anti - collision and anti - pad - oxidation of the display module, and improving the electrical connection stability and service life of the display module.

[0005] In order to solve the above - mentioned technical problems, the utility model adopts the following technical solutions:

[0006] A display module, which includes a backlight rubber holder, a display screen, and a PCB board. The display screen is disposed on one surface of the backlight rubber holder, and the PCB board is disposed on the other surface of the backlight rubber holder. A main screen FPC is connected to the display screen, and a backlight FPC is provided on the main screen FPC. After being bent, the backlight FPC and the main screen FPC are electrically connected to the PCB board to form a welding area. Components and connectors are provided on the PCB board, and a first sealant is provided on the surface of the PCB board. The first sealant covers the component area, the connector, and the welding area on the PCB board.

[0007] As a preferred embodiment of the display module provided by the present utility model, a first groove structure is provided on one surface of the backlight rubber holder. The display screen is installed in the first groove structure. A lead groove is provided on one side of the first groove structure. The backlight FPC and the main screen FPC are led out from the lead groove, bent, and then connected to the PCB board.

[0008] As a preferred embodiment of the display module provided by the present utility model, after the backlight FPC and the main screen FPC are led out from the lead groove, the lead groove is filled with a second sealant.

[0009] As a preferred embodiment of the display module provided by the present utility model, a plurality of material scooping grooves are provided on the outer side of the surface of the backlight rubber holder located in the first groove structure.

[0010] As a preferred embodiment of the display module provided by the present utility model, the bottom surface of the first groove includes a visible area and a non-visible area, and a light-shielding layer is provided in the non-visible area.

[0011] As a preferred embodiment of the display module provided by the present utility model, the light-shielding layer is a light-shielding glue layer.

[0012] As a preferred embodiment of the display module provided by the present utility model, a second groove structure is provided on the other surface of the backlight rubber holder. The PCB board is disposed in the second groove structure, and the lead groove communicates with the first groove structure and the second groove structure.

[0013] As a preferred embodiment of the display module provided by the present utility model, the second sealant fills the second groove structure, and the surface of the first sealant away from the PCB board is flush with the other surface of the backlight rubber holder.

[0014] As a preferred embodiment of the display module provided by the present utility model, a double-sided adhesive is attached to the bottom surface of the second groove structure, and the PCB board is bonded and fixed to the bottom surface of the second groove structure through the double-sided adhesive.

[0015] As a preferred embodiment of the display module provided by the present utility model, the planar dimension of the PCB board is smaller than that of the second groove structure, and there is a gap between the periphery of the PCB board and the inner wall of the second groove structure.

[0016] Compared with the prior art, the present utility model has the following beneficial effects: For the display module provided by the present utility model, the PCB board is sealed by the first sealant, so as to seal the component area, connector and welding area on the PCB board, which can avoid glue detachment, achieve effective protection for components, connectors and pads. When encountering an impact, the first sealant can play a buffering role, improve the anti-collision performance, thereby realizing the high protection requirements of waterproof, anti-collision and anti-pad oxidation for the display module, and improving the electrical connection stability and service life of the display module. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the solutions in the present utility model, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following described drawings are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0018] Figure 1 Front view schematic diagram of the backlight glue holder in the display module provided by the present utility model;

[0019] Figure 2 Back view schematic diagram of the backlight glue holder in the display module provided by the present utility model;

[0020] Figure 3 For Figure 1 A - A cross-sectional view schematic diagram of the backlight glue holder in

[0021] Figure 4 Front view schematic diagram of the backlight glue holder after installing the display screen in the display module provided by the present utility model;

[0022] Figure 5 Back view schematic diagram of the backlight glue holder after installing the PCB board in the display module provided by the present utility model;

[0023] Figure 6 For Figure 4 Structural schematic diagram of the B - B cross-section without filling sealant in

[0024] Figure 7 Structural schematic diagram of the display module provided by the present utility model after filling sealant.

[0025] The markings in the figures are explained as follows:

[0026] 1. Backlight adhesive holder; 2. Display screen; 3. PCB board; 4. Main screen FPC; 5. Backlight FPC; 6. Component area; 7. Connector; 8. First sealant; 9. First groove structure; 91. Visible area; 92. Non-visible area; 93. Light-shielding adhesive layer; 10. Lead groove; 11. Second sealant; 12. Material scooping groove; 13. Second groove structure; 14. Double-sided adhesion. Detailed implementation manners

[0027] In order to enable those skilled in the art of this technology to better understand the solution of the present utility model, the following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0028] As described in the background art, usually the components and pads of the display module are reserved outside the module. For some projects with high requirements, such as waterproofness, it is difficult to meet the usage requirements. The existing structure is prone to delamination, resulting in poor sealing between the waterproof sealant and the waterproof board, and there is no protection for the internal components. When encountering collisions, the components are easily damaged, and the anti-collision performance is poor. The pad position is also prone to oxidation, reducing the electrical connection performance.

[0029] To solve this technical problem, the present utility model provides a display module, which is applied in the field of display modules.

[0030] Specifically, please refer to Figures 1-7 , the display module specifically includes a backlight adhesive holder 1, a display screen 2, and a PCB board 3. The display screen 2 is disposed on one surface of the backlight adhesive holder 1, and the PCB board 3 is disposed on the other surface of the backlight adhesive holder 1. A main screen FPC 4 is connected to the display screen 2, and a backlight FPC 5 is provided on the main screen FPC 4. After the backlight FPC 5 and the main screen FPC 4 are bent, they are electrically connected to the PCB board 3 to form a welding area. A component area 6 and a connector 7 are provided on the PCB board 3, and a first sealant 8 is provided on the surface of the PCB board 3. The first sealant 8 covers the component area, the connector 7, and the welding area on the PCB board 3.

[0031] The display module provided by the present utility model seals the PCB board 3 with the first sealant 8, thereby sealing the component area, connector 7, and welding area on the PCB board 3, which can avoid glue detachment and achieve effective protection for components, connector 7, and pads. When encountering impact, the first sealant 8 can play a buffering role and improve the anti-collision performance, thereby realizing the high protection requirements of waterproof, anti-collision, and anti-pad oxidation for the display module, and improving the electrical connection stability and service life of the display module.

[0032] In order to enable those skilled in the art to better understand the solution of the present utility model, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings.

[0033] It should be noted that, without conflict, the embodiments in the present utility model and the features and technical solutions in the embodiments can be combined with each other.

[0034] It should be noted that similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0035] Please refer to Figures 1-7 , a display module is provided, which includes a backlight rubber frame 1, a display screen 2, and a PCB board 3. The display screen 2 is a liquid crystal display screen 2. The display screen 2 is disposed on one surface of the backlight rubber frame 1, and the PCB board 3 is disposed on the other surface of the backlight rubber frame 1. A main screen FPC 4 is connected to the display screen 2, and a backlight FPC 5 is provided on the main screen FPC 4. After the backlight FPC 5 and the main screen FPC 4 are bent, they are electrically connected to the PCB board 3 to form a welding area. Specifically, after the backlight FPC 5 and the main screen FPC 4 are bent, they are welded to the pads on the PCB board 3. Components area 6 and connector 7 are provided on the PCB board 3. Multiple components are provided in the components area 6. A first sealant 8 is provided on the surface of the PCB board 3. The first sealant 8 covers the component area, connector 7, and welding area on the PCB board 3 to achieve the purpose of sealing. At the same time, a backlight module (not shown in the figure) is further provided in the backlight rubber frame 1, and the backlight module is used to provide backlight for the display screen 2.

[0036] The display screen 2 includes a lower polarizer, a lower layer of glass, an upper layer of glass, and an upper polarizer stacked in sequence. One end of the lower layer of glass extends outward and a driving IC is provided. The main screen FPC 4 is bonded to the lower layer of glass. This part is a conventional existing structure and will not be specifically described here. The leading end of the main screen FPC 4 is connected to the backlight FPC 5, and the backlight FPC 5 is connected to the PCB board 3 for driving and controlling the backlight source.

[0037] Further optimize the display module provided in Embodiment 1. Specifically, as Figure 3 、 4As shown in Figures 6 and 7, a first groove structure 9 is provided on one surface of the backlight glue holder 1, and the display screen 2 is installed in the first groove structure 9. The periphery of the first groove structure 9 is a bent frame wall structure, and a lead wire groove 10 is provided on one side of the first groove structure 9. The lead wire groove 10 is provided on one side of the bottom of the first groove. The backlight FPC 5 and the main screen FPC 4 are led out from the lead wire groove 10 and bent and then connected to the PCB board 3. After the backlight FPC 5 and the main screen FPC 4 are led out from the lead wire groove 10, the lead wire groove 10 is filled with a second sealant 11 for fixing the backlight FPC 5 and the main screen FPC 4, and at the same time, the lead wire groove 10 can be sealed.

[0038] As Figure 1 , 3 shown, at the same time, a plurality of material extraction grooves 12 are provided on the outer side of the surface of the backlight glue holder 1 where the first groove structure 9 is located. The material extraction grooves 12 are arranged around the first groove structure 9. The shape of the material extraction grooves 12 is rectangular. The setting of the material extraction grooves 12 can prevent the backlight glue holder 1 from shrinking, reduce the deformation amount of the backlight glue holder 1, and avoid squeezing the internal film material.

[0039] As Figure 1 shown, the bottom surface of the first groove includes a visible area 91 and a non-visible area 92. A light-shielding layer is provided in the non-visible area 92. The light-shielding layer is a light-shielding glue layer 93. The light-shielding glue layer 93 can bond and fix the display screen 2, and at the same time play a light-shielding effect. The light-shielding layer is also provided in the non-display area of the display screen 2. The visible area 91 is provided in the display area of the display screen 2.

[0040] For further optimization of the display module provided in Embodiment 2, specifically, as Figure 2 , 3 , 5, and 6 shown, a second groove structure 13 is provided on the other surface of the backlight glue holder 1. The PCB board 3 is arranged in the second groove structure 13. The lead wire groove 10 communicates with the first groove structure 9 and the second groove structure 13. The first sealant 8 fills the second groove structure 13, and the surface of the first sealant 8 away from the PCB board 3 is flush with the other surface of the backlight glue holder 1, so that the first sealant 8 can fully seal the PCB board 3. And a double-sided adhesive 14 is pasted on the bottom surface of the second groove structure 13. There are three double-sided adhesives 14. The PCB board 3 is bonded and fixed to the bottom surface of the second groove structure 13 through the double-sided adhesive 14. The setting of the double-sided adhesive 14 makes there be a gap between the PCB board 3 and the bottom of the second groove structure 13. The planar size of the PCB board 3 is smaller than the planar size of the second groove structure 13, and there are gaps between the periphery of the PCB board 3 and the inner wall of the second groove structure 13, so that the first sealant 8 can flow into the space between the PCB board 3 and the second groove structure 13, further improving the sealing performance. The setting of the second groove structure 13 can also avoid the problem of de-bonding between the first sealant 8 and the PCB board 3 and improve the stability of the seal.

[0041] The working principle of the display module provided by the present utility model: First groove structures 9 and second groove structures 13 are formed on the upper and lower surfaces of the backlight glue holder 1. A light-shielding glue layer 93 is applied to the bottom non-viewing area 92 of the first groove structure 9. The display screen 2 is placed into the first groove structure 9, and the main screen FPC 4 and the backlight FPC 5 on the display screen 2 are introduced into the second groove structure 13 from the lead groove 10 on one side of the first groove structure 9. The PCB board 3 is adhesively fixed to the bottom of the second groove structure 13 through the double-sided adhesive 14. Then, the main screen FPC 4 and the backlight FPC 5 are soldered and fixed to the pads on the PCB board 3. The second sealant 11 is poured into the lead groove 10 to seal the lead groove 10. After the second sealant 11 solidifies, the first sealant 8 is filled into the second groove structure 13 to seal the PCB board 3, thereby sealing the component area, the connector 7, and the soldering area on the PCB board 3, which can avoid glue detachment and achieve effective protection for the components, the connector 7, and the pads. When encountering an impact, the first sealant 8 can play a buffering role and improve the anti-collision performance, thereby realizing the high protection requirements of the display module for waterproofing, anti-collision, and preventing pad oxidation, and improving the electrical connection stability and service life of the display module.

[0042] In the present utility model, unless otherwise clearly specified and defined, terms such as "installation", "connection", "connection", "fixation", etc. shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection, an electrical connection, or communication with each other; it can be directly connected, or indirectly connected through an intermediate medium, and can be the internal communication of two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0043] Obviously, the embodiments described above are only a part of the embodiments of the present utility model, rather than all of the embodiments. The preferred embodiments of the present utility model are shown in the drawings, but do not limit the patent scope of the present utility model. The present utility model can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosed content of the present utility model more thorough and comprehensive. Although the present utility model 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 specific embodiments, or perform equivalent replacements for some of the technical features. Any equivalent structures made directly or indirectly using the content of the specification and drawings of the present utility model in other related technical fields are similarly within the scope of the patent protection of the present utility model.

Claims

1. A display module, which comprises a backlight rubber holder, a display screen and a PCB board, and is characterized in that, The display screen is disposed on one surface of the backlight glue holder, the PCB board is disposed on the other surface of the backlight glue holder, a main screen FPC is connected to the display screen, a backlight FPC is provided on the main screen FPC, and after the backlight FPC and the main screen FPC are bent, they are electrically connected to the PCB board to form a welding area. Components area and connectors are provided on the PCB board, and a first sealant is provided on the surface of the PCB board, and the first sealant covers the component area, the connector and the welding area on the PCB board.

2. The display module according to claim 1, characterized in that, A first groove structure is provided on one surface of the backlight glue holder, the display screen is installed in the first groove structure, a lead groove is provided on one side of the first groove structure, and the backlight FPC and the main screen FPC are led out from the lead groove and bent and then connected to the PCB board.

3. The display module according to claim 2, wherein After the backlight FPC and the main screen FPC are led out from the lead groove, the lead groove is filled with a second sealant.

4. A display module according to claim 2, wherein A plurality of material scooping grooves are provided on the outer side of the surface of the backlight glue holder located in the first groove structure.

5. The display module according to claim 2, wherein The bottom surface of the first groove includes a visible area and a non-visible area, and a light-shielding layer is provided in the non-visible area.

6. The display module according to claim 5, wherein The light-shielding layer is a light-shielding glue layer.

7. The display module according to claim 3, wherein A second groove structure is provided on the other surface of the backlight glue holder, the PCB board is disposed in the second groove structure, and the lead groove communicates the first groove structure and the second groove structure.

8. A display module according to claim 7, wherein The second sealant fills the second groove structure and one surface of the first sealant away from the PCB board is flush with the other surface of the backlight glue holder.

9. The display module according to claim 7, wherein A double-sided adhesive is attached to the bottom surface of the second groove structure, and the PCB board is adhesively fixed to the bottom surface of the second groove structure through the double-sided adhesive.

10. A display module according to claim 9, characterized in that, The planar dimension of the PCB board is smaller than the planar dimension of the second groove structure, and a gap is left between the periphery of the PCB board and the inner wall of the second groove structure.

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