Backlight project root waterproof structure

Abstract

The utility model provides a waterproof structure of rear group backlight project root, it includes the blast -proof film, cover glass, solid glue, flexible circuit board and glass substrate connecting assembly, backlight unit that connect gradually, flexible circuit board and glass substrate connecting assembly and backlight unit are pasted, and the gap that exists because of the flexible circuit board bending is formed in the root of flexible circuit board and glass substrate connecting assembly of backlight unit, adopt a film -shaped component to wrap the gap and realize waterproof, one side of film -shaped component is connected with the edge of cover glass, the other side is connected with the edge of backlight unit, and it is 5mm in the length direction along the FPC single side outer expansion. The utility model discloses a film -shaped component to wrap the gap of backlight unit in the root of flexible circuit board and glass substrate connecting assembly, can effectively block the invasion of water vapor, improve the waterproof performance of electric capacity screen.

Description

Technical Field

[0001] This utility model mainly relates to the technical field of capacitive screen processing, specifically to the waterproof structure at the root of the rear backlight project. Background Technology

[0002] Capacitive touchscreens are high-precision electronic products. Their assembly methods are divided into two types: pre-attachment followed by assembly and pre-assembly followed by pre-attachment. They are mainly composed of explosion-proof film, cover glass, solid adhesive, FOG (foil-on-frame), and BLU (black-and-white) bonding. With the development of the market, touchscreens have gradually shifted from pre-assembly followed by assembly to pre-attachment followed by assembly. The biggest problem currently encountered by the pre-attachment followed by assembly method is that it cannot pass the waterproof test. The BLU has a reserved FPC bending position at the base of the FOG, which makes it easy for moisture to enter and affect product performance.

[0003] Existing protective measures mostly involve applying adhesive to both sides of the FOG root to prevent moisture from entering. This method requires manual application of adhesive during production, resulting in low production efficiency and poor operator standardization, often failing to achieve a complete seal. Utility Model Content

[0004] This utility model mainly provides a waterproof structure at the base of the rear backlight project to solve the technical problems mentioned in the background art.

[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows:

[0006] The waterproof structure at the base of the rear backlight project includes an explosion-proof film, a cover glass, solid glue, a flexible circuit board and glass substrate connection assembly, and a backlight unit connected in sequence. The flexible circuit board and glass substrate connection assembly and the backlight unit are bonded together, and there is a gap in the backlight unit at the base of the flexible circuit board and glass substrate connection assembly caused by the bending of the flexible circuit board.

[0007] A thin film-like component is used to wrap the gap to achieve waterproofing. One side of the thin film-like component is connected to the edge of the cover glass, and the other side is connected to the edge of the backlight unit. It extends outward by 5mm along one side of the FPC in the length direction.

[0008] Furthermore, the thin-film component is black.

[0009] Furthermore, the width of the portion connecting the thin-film component to the edge of the cover glass is 3mm, and the width of the portion connecting it to the edge of the backlight unit is 4mm.

[0010] Furthermore, when the thin film component wraps around the notch, the area covering the notch accounts for more than 80% of the total area of ​​the notch.

[0011] Furthermore, after the film-like component wraps around the notch, its surface flatness error does not exceed 0.2mm.

[0012] Furthermore, the thin-film component is connected to the cover glass and the backlight unit by adhesive bonding.

[0013] Furthermore, the adhesive used for the bonding connection is a waterproof adhesive.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] Firstly, by setting a thin-film component to wrap around the gap at the root of the connection assembly between the flexible circuit board and the glass substrate of the backlight unit, this utility model can effectively prevent water vapor from entering, improve the waterproof performance of the capacitive screen, and extend its service life.

[0016] Secondly, the specific size parameters and connection method of the thin-film component of this utility model ensure its good compatibility with the various components of the capacitive screen, and while achieving waterproof function, it will not have a negative impact on the original structure and performance of the capacitive screen.

[0017] Thirdly, this utility model uses waterproof adhesive for bonding, which further improves the sealing and reliability of the waterproof structure, ensuring effective waterproofing in various usage environments.

[0018] The present invention will be explained in detail below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0019] Figure 1 This is a cross-sectional view of the present invention;

[0020] Figure 2 This is a schematic diagram of the structure of this utility model.

[0021] In the diagram: 1. Explosion-proof film; 2. Cover glass; 3. Solid adhesive; 4. Flexible circuit board and glass substrate connection assembly; 5. Backlight unit; 51. Notch; 6. Thin film component. Detailed Implementation

[0022] To facilitate understanding of this utility model, a more comprehensive description of the utility model will be given below with reference to the accompanying drawings, which show several embodiments of the utility model. However, the utility model can be implemented in different forms and is not limited to the embodiments described in the text. On the contrary, these embodiments are provided to make the disclosure of the utility model more thorough and comprehensive.

[0023] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0025] This application provides a waterproof structure at the base of the rear backlight unit, as shown in the schematic diagram below. Figure 1-2 As shown. The waterproof structure at the root of the rear backlight project includes, in sequence, an explosion-proof film 1, a cover glass 2, a solid adhesive 3, a flexible circuit board and glass substrate connection assembly 4, and a backlight unit 5. The flexible circuit board and glass substrate connection assembly 4 and the backlight unit 5 are bonded together, and the backlight unit 5 has a notch 51 at the root of the flexible circuit board and glass substrate connection assembly 4 due to the bending of the flexible circuit board.

[0026] A thin film component 6 is used to wrap the notch 51 to achieve waterproofing. One side of the thin film component 6 is connected to the edge of the cover glass 2, and the other side is connected to the edge of the backlight unit 5. It extends outward by 5mm along one side of the FPC in the length direction.

[0027] It should be noted that in this embodiment, the capacitive screen is composed of an explosion-proof film 1, a cover glass 2, solid adhesive 3, a flexible circuit board and glass substrate connection assembly 4, and a backlight unit 5 connected sequentially. At the root of the flexible circuit board and glass substrate connection assembly 4, the backlight unit 5 has a gap 51 created by the bending of the flexible circuit board. This gap is a potential channel for moisture to enter the capacitive screen. A thin film component 6 is used to wrap the gap 51, connecting one side to the edge of the cover glass 2 and the other side to the edge of the backlight unit 5, and extending 5mm outward along one side of the FPC in the length direction, thus forming a physical barrier to prevent moisture from entering through the gap 51. This structure, by wrapping the gap 51 with the thin film component 6 to form a physical barrier, effectively blocks the moisture intrusion channel, prevents moisture from entering the capacitive screen and corroding electronic components, and improves the stability and reliability of the capacitive screen. It is compatible with the existing capacitive screen structure, and the connection between the cover glass 2 and the backlight unit 5 ensures stability, preventing it from falling off due to external vibration or normal use. The 5mm outward extension along one side of the FPC can cover any possible gaps or weak areas, further enhancing the waterproof effect.

[0028] Optionally, such as Figure 1 and Figure 2 As shown, the thin film component 6 is black.

[0029] In this embodiment, the thin-film component 6 is black. In practical applications, black has good light-blocking properties. While the thin-film component 6 serves to waterproof the notch 51, the black material can prevent internal light leakage, avoiding light leakage that could affect the display effect, and also preventing external light from interfering with the internal optical structure.

[0030] Optionally, such as Figure 1 and Figure 2 As shown, the width of the portion connecting the thin film component 6 to the edge of the cover glass 2 is 3mm, and the width of the portion connecting it to the edge of the backlight unit 5 is 4mm.

[0031] In this embodiment, the width of the connection between the thin-film component 6 and the edge of the cover glass 2 is 3mm, and the width of the connection between the thin-film component 6 and the edge of the backlight unit 5 is 4mm. This precise width setting is based on considerations of structural stability and waterproofing. Appropriate connection widths ensure sufficient contact area between the thin-film component 6 and the cover glass 2 and the backlight unit 5, providing a stable connection force when using bonding methods such as adhesive, preventing the thin-film component 6 from detaching. Simultaneously, it effectively covers possible moisture intrusion paths, enhancing the waterproofing effect.

[0032] Optionally, such as Figure 1 and Figure 2 As shown, when the thin film component 6 wraps around the notch 51, the area covering the notch 51 accounts for more than 80% of the total area of ​​the notch 51.

[0033] In this embodiment, when the thin-film component 6 covers the notch 51, the area covering the notch 51 should account for more than 80% of the total area of ​​the notch 51. Only with sufficient coverage can the thin-film component 6 more comprehensively prevent moisture from entering the capacitive screen through the notch 51. A larger coverage area can reduce the possibility of moisture bypassing the thin-film component 6 and entering, forming a more reliable waterproof barrier.

[0034] Optionally, such as Figure 1 and Figure 2 As shown, after the thin film component 6 wraps around the notch 51, its surface flatness error does not exceed 0.2mm.

[0035] In this embodiment, the surface flatness error of the film-like component 6 after wrapping the notch 51 is required to be no more than 0.2 mm. A flat surface helps ensure a tight fit between the film-like component 6 and the surrounding components, reducing gaps or air bubbles caused by surface unevenness. These gaps and air bubbles can become channels for moisture intrusion, affecting the waterproof effect. At the same time, a flat surface also helps improve the quality of the adhesive connection and enhances the stability of the structure.

[0036] Optionally, such as Figure 1 and Figure 2 As shown, the thin-film component 6 is connected to the cover glass 2 and the backlight unit 5 by adhesive bonding.

[0037] In this embodiment, the thin-film component 6 is bonded to the cover glass 2 and the backlight unit 5 using an adhesive bonding method. Adhesive bonding creates a tight bond between the two components, filling any tiny gaps and preventing moisture from entering through the connection point. Furthermore, the bonding process is relatively simple and easy to operate, thus improving production efficiency.

[0038] Optionally, such as Figure 1 and Figure 2 As shown, the adhesive used for bonding is waterproof adhesive.

[0039] In this embodiment, waterproof adhesive is used for bonding. The waterproof adhesive has excellent waterproof properties, forming a waterproof barrier at the bonding site to prevent moisture from entering the capacitive screen through the bonding gaps. Simultaneously, the waterproof adhesive also enhances the bonding strength, making the connection between the thin-film component 6 and the cover glass 2 and backlight unit 5 more reliable.

[0040] The present invention has been described above by way of example in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvement made by adopting the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution of the present invention to other occasions without modification, shall be within the protection scope of the present invention.

Claims

1. A waterproof structure at the base of the rear backlight unit, characterized in that, The assembly includes an explosion-proof film (1), a cover glass (2), a solid adhesive (3), a flexible circuit board and a glass substrate connection assembly (4), and a backlight unit (5) connected in sequence. The flexible circuit board and glass substrate connection assembly (4) and the backlight unit (5) are bonded together, and the backlight unit (5) has a notch (51) at the root of the flexible circuit board and glass substrate connection assembly (4) formed by the bending of the flexible circuit board. Waterproofing is achieved by wrapping the notch (51) with a thin film component (6). One side of the thin film component (6) is connected to the edge of the cover glass (2), and the other side is connected to the edge of the backlight unit (5). It extends outward by 5mm along one side of the FPC in the length direction.

2. The waterproof structure at the base of the rear backlight unit according to claim 1, characterized in that, The thin film component (6) is black.

3. The waterproof structure at the base of the rear backlight unit according to claim 1, characterized in that, The width of the portion connecting the thin film component (6) to the edge of the cover glass (2) is 3 mm, and the width of the portion connecting the thin film component (6) to the edge of the backlight unit (5) is 4 mm.

4. The waterproof structure at the base of the rear backlight unit according to claim 1, characterized in that, When the thin film component (6) wraps the notch (51), the area covering the notch (51) accounts for more than 80% of the total area of ​​the notch (51).

5. The waterproof structure at the base of the rear backlight unit according to claim 1, characterized in that, After the thin film component (6) wraps the notch (51), its surface flatness error does not exceed 0.2 mm.

6. The waterproof structure at the base of the rear backlight unit according to claim 1, characterized in that, The thin-film component (6) is connected to the cover glass (2) and the backlight unit (5) by adhesive bonding.

7. The waterproof structure at the base of the rear backlight unit according to claim 6, characterized in that, The adhesive used for bonding is waterproof adhesive.

Images