An anti-leakage structure for preventing melamine leakage light at an IR hole

Abstract

This utility model relates to the field of electronic display module technology, and specifically discloses an anti-leakage structure for Mylar light leakage at the IR hole. It includes a CG or TP, an LCD liquid crystal display, a POL polarizer, a BL backlight, and a frame, assembled sequentially. It also includes a backlight FPC electrically connected to the BL backlight and frame. A Mylar is provided between the BL backlight and frame and the IR hole. A release film is provided with the Mylar, which is recessed 0.2mm inward relative to the side of the Mylar facing the IR hole, causing the side of the Mylar facing the IR hole to protrude 0.2mm. A seam is provided along the bend of the Mylar corresponding to the BL backlight and frame, and the seam is cut along the bending trajectory of the BL backlight and frame. This device effectively solves the light leakage problem at the IR hole of the display module, reducing the light leakage ratio from 3.5% in the traditional design to 0.5%. It also improves the product yield of the automated lamination process and helps to narrow and reduce the overall bezel size, enhancing product novelty and helping to capture new markets.

Description

Technical Field

[0001] This utility model relates to the field of electronic display module technology, and in particular to a light leakage prevention structure for Mylar light leakage at IR apertures. Background Technology

[0002] With the emergence of major mobile phone screen manufacturers, the current mobile phone market offers a diversified range of screen options. The materials used in the screen and the manufacturer's cost control largely determine its quality. Touchscreen displays have greatly facilitated people's lives, and consumers' demands for mobile phones are no longer limited to communication. The emergence of a wide variety of entertainment apps and various cool 3D mobile games has led to continuous increases in the requirements for mobile phone display screens, alongside upgrades to mobile phone CPUs.

[0003] Existing module backlights are prone to light leakage. Traditional Mylar designs use a release film flush with the Mylar and no special treatment is done at the bending point of the BL backlight. This results in the Mylar and CG or TP being 0 distances during machine setup, insufficient bonding tightness during automated bonding, and Mylar easily rebounding and lifting. The light leakage rate is as high as 3.5%. At the same time, this traditional design also restricts the further narrowing and miniaturization of the overall frame, making it difficult to meet the extreme requirements of product structural design and unable to effectively improve product novelty to adapt to new market competition. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a light leakage prevention structure for Mylar light leakage at IR holes. It solves the problem that in existing display modules, light leakage is easy between the backlight and the IR holes on the CG or TP. Traditional Mylar uses a release film flush with the Mylar, and there is no special treatment at the bending point of the BL backlight. This results in the Mylar and CG or TP being 0 distance apart during adjustment, insufficient automatic bonding tightness, and Mylar being prone to rebound. The light leakage rate reaches 3.5%. It also restricts the narrowing of the overall bezel, making it difficult to meet the extreme requirements of product structure design and improve the novelty to adapt to new markets.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A light leakage prevention structure for Mylar light leakage at IR apertures includes a CG or TP, an LCD liquid crystal display, a POL polarizer, a BL backlight, and a frame, assembled sequentially. It also includes a backlight FPC electrically connected to the BL backlight and frame, a display FPC electrically connected to the LCD liquid crystal display, and an IR aperture on the CG or TP corresponding to the position of the BL backlight and frame. Mylar is provided between the BL backlight and frame and the IR aperture. A release film is provided on the Mylar. The release film is recessed 0.2mm inward relative to the side of the Mylar facing the IR aperture, causing the Mylar to protrude 0.2mm inward relative to the IR aperture. A seam is provided across the Mylar at the bend of the BL backlight and frame. The seam is cut along the bending trajectory of the BL backlight and frame to prevent the Mylar from rebounding after bending. The 0.2mm inward recess of the Mylar release film and the protruding Mylar improve adhesion. The seam at the bend prevents rebound. Together, these factors reduce the light leakage rate from 3.5% to 0.5%, and also help to narrow the overall bezel.

[0007] Preferably, the inner shrinkage dimension of the release film is 0.18mm to 0.22mm, and the overhang dimension of the Mylar is consistent with the inner shrinkage dimension of the release film. This can cover the deviation of mass production processing, avoid insufficient Mylar overhang or bonding gap due to dimensional accuracy issues, ensure stable light leakage prevention effect during mass production, and improve the yield of automated bonding.

[0008] Preferably, the seam is a continuous straight line or an intermittent cut seam, and the length of the seam is not less than the length of the BL backlight and the bent section of the frame. The continuous / intermittent cut seam adapts to various display module scenarios mentioned in the documentation, enhancing versatility; the seam length is not less than the bent section of the BL backlight, which can fully cover the bent area, avoid rebound and curling at uncut areas, eliminate light leakage from gaps, and enhance the sealing effect.

[0009] Preferably, the distance between the Mylar and the CG or TP is 0.08mm to 0.12mm, which provides assembly space to prevent squeezing and deformation, while maintaining tight fit and ensuring that it is in a low light leakage range, thus adapting to automated processes and improving the pass rate.

[0010] Preferably, the Mylar is coated with an adhesive layer for bonding on the side facing the IR hole. The adhesive layer covers the area of ​​the Mylar that is overhanging. The adhesive layer covers the area of ​​the Mylar that is overhanging, which enhances the bonding strength between the Mylar and the CG / TP according to the document requirements, solves the problem of insufficient adhesion in traditional bonding, eliminates the gap in the overhanging area, reduces the risk of light leakage, improves the structural stability during automated bonding, and reduces defective products.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] By optimizing the structure of Mylar (reducing the Mylar release film inward by 0.2mm so that Mylar protrudes by 0.2mm, and cutting the seam at the BL bend), the light leakage problem at the IR hole of the display module was effectively solved, reducing the light leakage ratio from 3.5% in the traditional design to 0.5%. At the same time, the product yield of the automated lamination process was improved, and it can also help to make the overall bezel narrower and smaller, enhance the product's novelty, and help to capture new markets. Attached Figure Description

[0013] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings.

[0014] Figure 1 This is a schematic diagram of the assembly structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the Mylar component structure of this utility model;

[0016] Figure 3 This is a schematic diagram of the production process of the Mylar of this utility model.

[0017] Illustrations: 1. CG or TP; 2. LCD screen; 3. POL polarizer; 4. BL backlight and frame; 5. Backlight FPC; 6. Display FPC; 7. IR aperture; 8. Mylar. Detailed Implementation

[0018] This application provides a light leakage prevention structure for Mylar light leakage at IR holes, effectively solving the problem of light leakage between the backlight and the IR holes on the CG or TP in existing display modules. Traditional Mylar light leakage is caused by the use of a release film flush with the Mylar and the lack of special treatment at the bending point of the BL backlight, resulting in zero distance between the Mylar and the CG or TP during setup, insufficient automatic bonding tightness, and easy rebound of the Mylar, with a light leakage rate of up to 3.5%. This also restricts the narrowing of the overall bezel, making it difficult to meet the extreme requirements of product structure design and improve novelty to adapt to new markets. This device effectively solves the light leakage problem at the IR holes of the display module, reducing the light leakage rate from 3.5% in the traditional design to 0.5%. At the same time, it improves the product yield of the automated bonding process and can help to make the overall bezel narrower and smaller, enhancing product novelty and helping to capture new markets.

[0019] Example

[0020] like Figure 1 , Figure 2 and Figure 3As shown, the technical solution in this application embodiment effectively solves the problem of light leakage between the backlight and the IR hole on the CG or TP in existing display modules. Traditional Mylar displays, due to their flush structure with the release film and lack of special treatment at the bending point of the BL backlight, result in zero distance between the Mylar and CG or TP during setup, insufficient automatic bonding tightness, and easy rebound of the Mylar, leading to a light leakage rate of up to 3.5%. This also restricts the narrowing of the overall bezel, making it difficult to meet the extreme requirements of product structure design and improve novelty to adapt to new markets. The overall approach is as follows: A light leakage prevention structure for Mylar at the IR hole, comprising, in sequence, a CG or TP1, an LCD liquid crystal display 2, a POL polarizer 3, and a BL... The backlight and frame 4 also include a backlight FPC5 electrically connected to the BL backlight and frame 4, a display FPC6 electrically connected to the LCD liquid crystal display 2, and an IR hole 7 opened on the CG or TP1 and corresponding to the position of the BL backlight and frame 4. A Mylar 8 is provided between the BL backlight and frame 4 and the IR hole 7. The Mylar 8 is equipped with a release film. The release film is recessed by 0.2mm relative to the side of the Mylar 8 facing the IR hole 7, so that the side of the Mylar 8 facing the IR hole 7 protrudes by 0.2mm. The Mylar 8 is provided with a seam at the bend of the BL backlight and frame 4. The seam is cut and set along the bending trajectory of the BL backlight and frame 4 to prevent the Mylar 8 from rebounding after bending.

[0021] The inward shrinkage dimension of the release film is 0.18mm to 0.22mm. The overhang dimension of Mylar 8 is consistent with the inward shrinkage dimension of the release film. The release film matching Mylar 8 is 0.2mm inward relative to the side of Mylar 8 facing the IR hole 7, so that the part of Mylar 8 facing the IR hole 7 naturally overhangs by 0.2mm. The overhanging area of ​​Mylar 8 is coated with an adhesive layer for bonding. When adjusting the machine, the distance between Mylar 8 and CG or TP1 is controlled at 0.1mm. The overhanging Mylar 8 can make more full contact with CG or TP1 through the adhesive layer, improve the bonding tightness between the two, eliminate bonding gaps, and thus block the light from the BL backlight and the adhesive frame 4 from leaking out of the gaps to the IR hole 7. At the same time, the 0.1mm distance provides reasonable assembly space, ensures the stability of the automated bonding process, and further reduces the risk of light leakage.

[0022] The seam is either a continuous straight line or an intermittent cut seam, and the length of the seam is not less than the length of the BL backlight and the 4-bend section of the frame.

[0023] The distance between Mylar 8 and CG or TP1 is 0.08mm to 0.12mm. The side of Mylar 8 facing the IR hole 7 is coated with an adhesive layer for bonding, covering the area where Mylar 8 protrudes. At the bend of Mylar 8 corresponding to the BL backlight and the frame 4, a seam is cut along the bending trajectory of the BL backlight and the frame 4. This seam weakens the elastic stress of Mylar 8 at the bend, allowing it to more closely conform to the bending curvature of the BL backlight and the frame 4 when bent, preventing Mylar 8 from rebounding and lifting due to elastic recovery, thus maintaining the alignment of Mylar 8 with the BL backlight and the frame 4 and the IR hole 7. The sealing of the gaps prevents light from leaking out of the IR hole 7 from the bend. The Myra 8's release film's inward and outward design blocks light leakage from the perspective of bonding stability. The Myra 8's straight seam cutting design at the bend of the BL backlight and the frame 4 blocks light leakage from the perspective of structural durability. The combined effect of the two can effectively reduce the light leakage ratio at the IR hole 7. At the same time, the optimized Myra 8 structure does not require additional module size, which can help to make the overall bezel narrower and smaller. Combined with the compact assembly of CG or TP1 and components such as the BL backlight and frame 4, it can improve the product's appearance and visual effect.

[0024] In response to the problems existing in the prior art, this utility model provides a light leakage prevention structure for Mylar light leakage at the IR hole. This device effectively solves the light leakage problem at the IR hole of the display module, reducing the light leakage ratio from 3.5% in the traditional design to 0.5%. At the same time, it improves the product yield of the automated bonding process and can help to make the overall bezel narrower and smaller, enhance the product novelty, and help to capture new markets.

[0025] Working principle:

[0026] The first step is to retract the release film of Mylar 8 by 0.2mm relative to the side of Mylar 8 facing the IR hole 7, so that the part of Mylar 8 facing the IR hole 7 naturally protrudes by 0.2mm. The protruding area of ​​Mylar 8 is coated with an adhesive layer for bonding. During machine adjustment, the distance between Mylar 8 and CG or TP1 is controlled at 0.1mm. The protruding Mylar 8 can make more full contact with CG or TP1 through the adhesive layer, improving the tightness of the bonding between the two, eliminating the bonding gap, thereby blocking the light from the BL backlight and the frame 4 from leaking into the IR hole 7 from the gap. At the same time, the 0.1mm distance provides reasonable assembly space, ensuring the stability of the automated bonding process and further reducing the risk of light leakage.

[0027] The second step involves cutting a seam along the bending trajectory of the BL backlight and frame 4 at the bend of the Mylar 8. This seam reduces the elastic stress of the Mylar 8 at the bend, allowing it to conform more closely to the curvature of the BL backlight and frame 4 when bent. This prevents the Mylar 8 from rebounding and warping due to elastic recovery, thus maintaining the sealing of the gap between the Mylar 8 and the BL backlight and frame 4 and the IR hole 7, preventing light from leaking out of the bend into the IR hole 7. The release film's inward and outward design blocks light leakage from the perspective of bonding stability; the Myra 8's seam-cut design at the bend of the BL backlight and frame 4 blocks light leakage from the perspective of structural durability. The combined effect of the two can effectively reduce the light leakage ratio at the IR hole 7. At the same time, the optimized Myra 8 structure does not require additional module size, which can help to make the overall bezel narrower and smaller. Combined with the compact assembly of components such as CG or TP1, BL backlight and frame 4, it improves the product's appearance and visual effect.

[0028] Finally, it should be noted that the above embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the implementation. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A light leakage prevention structure for Mylar light leakage at IR apertures, characterized in that, It includes a CG or TP (1), an LCD liquid crystal display (2), a POL polarizer (3), a BL backlight and a frame (4) assembled in sequence, and also includes a backlight FPC (5) electrically connected to the BL backlight and the frame (4), a display FPC (6) electrically connected to the LCD liquid crystal display (2), and an IR hole (7) opened on the CG or TP (1) and corresponding to the position of the BL backlight and the frame (4); Among them, a Mylar (8) is provided between the BL backlight and the frame (4) and the IR hole (7). The Mylar (8) is equipped with a release film. The release film is recessed by 0.2mm relative to the side of the Mylar (8) facing the IR hole (7), so that the side of the Mylar (8) facing the IR hole (7) protrudes by 0.2mm. The Mylar (8) has a seam at the bend of the BL backlight and the frame (4). The seam is cut along the bending trajectory of the BL backlight and the frame (4) to prevent the Mylar (8) from rebounding after bending.

2. The light leakage prevention structure for Mylar light leakage at the IR aperture as described in claim 1, characterized in that, The inner shrinkage dimension of the release film is 0.18mm to 0.22mm, and the overhang dimension of Mylar (8) is consistent with the inner shrinkage dimension of the release film.

3. The light leakage prevention structure for Mylar light leakage at the IR aperture as described in claim 1, characterized in that, The seam is a continuous straight line or an intermittent cut seam, and the length of the seam is not less than the length of the bent section of the BL backlight and the frame (4).

4. The light leakage prevention structure for Mylar light leakage at the IR aperture as described in claim 2, characterized in that, The distance between Myra (8) and CG or TP (1) is 0.08 mm to 0.12 mm.

5. The light leakage prevention structure for Mylar light leakage at the IR aperture as described in claim 4, characterized in that, The Mylar (8) is coated with an adhesive layer for bonding on the side facing the IR hole (7), the adhesive layer covering the area of ​​the Mylar (8) that is overhanging.

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