An ultra-narrow frame touch display module light leakage prevention device

Abstract

The utility model belongs to touch -control display module technical field especially a kind of super narrow frame touch -control display module light leakage prevention device, including backlight module, the upper portion of backlight module is provided with shading mela, the upper portion of backlight module is provided with cover, the rear side fixed mounting of cover is provided with backlight iron frame, the upper portion of cover is provided with two photosensitive holes, shading mela is pasted on the upper side of backlight module, and recess is set in the position corresponding cover photosensitive hole of backlight iron frame, the light leakage of backlight side edge can be accurately blocked, avoid the interference of light leakage light source to cover photosensitive hole test, significantly improve the accuracy and reliability of photosensitive hole test data;Prevent light leakage to help improve the overall display effect of display module, reduce the display picture edge halo, luminance uneven problem caused by light leakage, improve product quality, enhance the competitiveness of product in market.

Description

Technical Field

[0001] This utility model relates to the field of touch display module technology, and in particular to a light leakage prevention device for an ultra-narrow bezel touch display module. Background Technology

[0002] With consumers' pursuit of thinner, lighter, and higher screen-to-body ratio display devices, ultra-narrow bezel touch display modules are widely used. In existing technologies, the top of the backlight module typically lacks light-shielding Mylar, and the photosensitive holes in the cover plate are close to the backlight edge. During reliability testing, light leakage is prone to occur at the backlight edge. These light-leaking sources interfere with the actual photosensitivity testing of the cover plate's photosensitive holes, leading to inaccurate photosensitivity data.

[0003] A light leakage prevention device for an ultra-narrow bezel touch display module is proposed. The backlight module lacks a light-shielding Mylar coating on its top, and the corresponding photosensitive hole on the cover plate is very close to the edge of the backlight. During reliability testing, light leakage is easily caused by the backlight edge, which directly affects the actual photosensitive test effect of the corresponding photosensitive hole on the cover plate, thus impacting product testing. Therefore, we propose a light leakage prevention device for an ultra-narrow bezel touch display module. Utility Model Content

[0004] The purpose of this invention is to provide a light leakage prevention device for an ultra-narrow bezel touch display module, which solves the existing problems.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A light leakage prevention device for an ultra-narrow bezel touch display module includes a backlight module, a light-shielding Mylar is provided above the backlight module, a cover plate is provided above the backlight module, a backlight iron frame is fixedly installed on the rear side of the cover plate, and two photosensitive holes are opened on the top of the cover plate. The light-shielding Mylar includes a high light-shielding and reflective layer and a wear-resistant protective layer.

[0007] As a further improvement to the above solution, a double-sided adhesive layer is provided on the front side of the backlight iron frame, and the light-blocking Mylar is attached to the double-sided adhesive layer.

[0008] As a further improvement to the above solution, the cover plate and the backlight iron frame are made of steel, and the photosensitive hole is connected to the display module.

[0009] As a further improvement to the above solution, a groove is provided on one side of the backlight iron frame, and the light-shielding Mylar fits into the groove.

[0010] As a further improvement to the above solution, the high light-shielding and reflective layer includes an outer aluminum foil layer and an inner polyethylene terephthalate layer, wherein the inner polyethylene terephthalate layer is fixedly connected to one side of the outer aluminum foil layer.

[0011] As a further improvement to the above solution, the wear-resistant protective layer includes a polyurethane coating and a polycarbonate layer, wherein the polyurethane coating is fixedly connected to one side of the polyethylene terephthalate inner layer, and the polycarbonate layer is fixedly connected to one side of the polyurethane coating.

[0012] As a further improvement to the above scheme, the outer layer of the aluminum foil is made of aluminum foil, and the inner layer of the polyethylene terephthalate is made of polyethylene terephthalate.

[0013] As a further improvement to the above solution, the polyurethane coating is made of polyurethane, and the polycarbonate layer is made of polycarbonate.

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

[0015] (1) The present invention provides an anti-light leakage device for an ultra-narrow bezel touch display module. By attaching light-shielding Mylar to the upper side of the backlight module and setting a groove at the position of the photosensitive hole of the cover plate corresponding to the backlight iron frame, it can accurately block the light leakage from the edge of the backlight side, avoid interference of the light leakage source on the photosensitive hole test of the cover plate, and significantly improve the accuracy and reliability of the photosensitive hole test data. Preventing light leakage helps to improve the overall display effect of the display module, reduce problems such as halo at the edge of the display screen and uneven brightness caused by light leakage, improve product quality, and enhance the competitiveness of the product in the market.

[0016] (2) The present invention provides a light leakage prevention device for an ultra-narrow bezel touch display module. This design mainly improves the existing display module structure locally without making significant adjustments to the production process. The added light-shielding Mylar, groove and auxiliary fixing structure are easy to manufacture and install, which can effectively reduce production costs and improve production efficiency. This light leakage prevention design is applicable to a variety of ultra-narrow bezel touch display module products. Whether it is a mobile phone, tablet or vehicle central control, this design can solve the problem of light leakage affecting the photosensitive hole test, and has a wide range of application prospects. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a three-dimensional structural diagram of an anti-light leakage device for an ultra-narrow bezel touch display module proposed in this utility model;

[0019] Figure 2This is a partial three-dimensional structural diagram of an anti-light leakage device for an ultra-narrow bezel touch display module proposed in this utility model;

[0020] Figure 3 This is a partial three-dimensional structural diagram of the high light-shielding reflective layer and the wear-resistant protective layer proposed in this utility model;

[0021] Figure 4 This is a partial three-dimensional structural diagram of the outer layer of the aluminum foil proposed in this utility model.

[0022] In the diagram: 1. Backlight module; 2. Light-shielding Mylar; 3. Cover plate; 4. Backlight iron frame; 5. Photosensitive hole; 6. Double-sided adhesive layer; 7. High light-shielding and reflective layer; 8. Wear-resistant protective layer; 9. Aluminum foil outer layer; 10. Polyethylene terephthalate inner layer; 11. Polyurethane coating; 12. Polycarbonate layer. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0024] refer to Figure 1-4 A light leakage prevention device for an ultra-narrow bezel touch display module includes a backlight module 1, a light-shielding Mylar 2 disposed above the backlight module 1, a cover plate 3 disposed above the backlight module 1, a backlight iron frame 4 fixedly installed on the rear side of the cover plate 3, and two photosensitive holes 5 opened on the top of the cover plate 3. The light-shielding Mylar 2 includes a high light-shielding and reflective layer 7 and a wear-resistant protective layer 8. The photosensitive holes 5 are opened on the cover plate 3, and the photosensitive holes 5 are used to install photosensitive elements to realize the light-sensing function of the touch display module. The photosensitive holes 5 are located on the upper side of the backlight module 1. During the operation and testing of the display module, the photosensitive holes 5 need to accurately receive external light signals. In this embodiment, a double-sided adhesive layer 6 is disposed on the front side of the backlight iron frame 4, and the light-shielding Mylar 2 is attached to the double-sided adhesive layer 6. In this embodiment, the cover plate 3 and the backlight iron frame 4 are made of steel, and the photosensitive holes 5 are connected to the display module.

[0025] In this embodiment, a groove is provided on one side of the backlight iron frame 4, and the light-shielding Mylar 2 fits into the groove; the backlight iron frame 4 is located around the backlight module 1 and is used to fix and support the backlight module 1; a groove is made on the backlight iron frame 4 at the position corresponding to the cover plate 3 and the photosensitive hole 5; the depth and width of the groove are designed according to the thickness and width of the light-shielding Mylar 2 to provide a space for the light-shielding Mylar 2 to be applied; the groove is set so that the light-shielding Mylar 2 will not cover the photosensitive hole 5 after application, and can effectively block the light from the backlight side to prevent light leakage from affecting the test effect of the photosensitive hole 5; the edge of the groove is designed with a smooth transition to avoid damage to the light-shielding Mylar due to sharp corners, and to ensure the integrity and light-shielding performance of the light-shielding Mylar; in this embodiment, the high light-shielding reflective layer 7 includes an aluminum foil outer layer 9 and a polyethylene terephthalate inner layer 10, and the polyethylene terephthalate inner layer 10 is fixedly connected to one side of the aluminum foil outer layer 9.

[0026] In this embodiment, the wear-resistant protective layer 8 includes a polyurethane coating 11 and a polycarbonate layer 12. The polyurethane coating 11 is fixedly connected to one side of the polyethylene terephthalate inner layer 10, and the polycarbonate layer 12 is fixedly connected to one side of the polyurethane coating 11. In this embodiment, the outer aluminum foil layer 9 is made of aluminum foil, and the inner polyethylene terephthalate layer 10 is made of polyethylene terephthalate. The outer aluminum foil layer 9 is made of aluminum foil, which has extremely high light reflectivity, enabling it to efficiently reflect the light emitted by the backlight module back into the module, reducing light leakage. At the same time, the aluminum foil is thin and lightweight, which does not increase the thickness of the display module, meeting the requirements of ultra-narrow bezels. Strict requirements are imposed on the aluminum foil; in addition, the aluminum foil has good moisture-proof and anti-oxidation properties, which can effectively protect the internal materials and extend the service life of the light-shielding Mylar; the inner layer 10 of polyethylene terephthalate is made of black PET polyethylene terephthalate film, which has excellent optical properties and strong absorption capacity for visible light and near-infrared light, which can further block light penetration; the PET film also has high mechanical strength and flexibility, and is not easy to break or deform. During the application process, it can be closely attached to the surface of the backlight module to ensure the light-shielding effect; in this embodiment, the polyurethane coating 11 is made of polyurethane, and the polycarbonate layer 12 is made of polycarbonate.

[0027] The implementation principle of the ultra-narrow bezel touch display module anti-light leakage device in this application embodiment is as follows: a light-shielding Mylar 2 is provided on the upper side of the backlight module 1. The light-shielding Mylar 2 is tightly attached to the upper side surface of the backlight module 1 to block the light leakage from the backlight module 1 to the upper side. The light-shielding Mylar 2 is made of a material with high light-shielding rate, which can effectively absorb or reflect light and reduce the occurrence of light leakage.

[0028] A photosensitive hole 5 is provided on the cover plate 3. The photosensitive hole 5 is used to install a photosensitive element to realize the photosensitive function of the touch display module. The photosensitive hole 5 is located on the upper side of the backlight module 1. During the operation and testing of the display module, the photosensitive hole 5 needs to accurately receive external light signals.

[0029] The backlight frame 4 is located around the backlight module 1 and is used to fix and support the backlight module 1. A groove is made on the backlight frame 4 at the position corresponding to the cover plate 3 and the photosensitive hole 5. The depth and width of the groove are designed according to the thickness and width of the light-shielding Mylar 2 to provide a space for the light-shielding Mylar 2 to be applied. The groove is designed so that the light-shielding Mylar 2 will not cover the photosensitive hole 5 after application, and can effectively block the light from the side of the backlight to prevent light leakage from affecting the test effect of the photosensitive hole 5. The edge of the groove is designed with a smooth transition to avoid damage to the light-shielding Mylar due to sharp edges and corners, and to ensure the integrity and light-shielding performance of the light-shielding Mylar.

[0030] A double-sided adhesive layer 6 is also provided between the backlight iron frame 4 and the light-shielding Mylar 2. The double-sided adhesive layer 6 is evenly coated on the upper side surface of the backlight module 1 to enhance the adhesion between the light-shielding Mylar 2 and the backlight module 1, ensuring that the light-shielding Mylar 2 will not shift or fall off during the use and testing of the display module. At the same time, an anti-slip texture is also provided on the inner surface of the groove of the backlight iron frame 4 to further increase the friction between the light-shielding Mylar and the backlight iron frame, so that the light-shielding Mylar is stably fixed in the groove.

[0031] The outer aluminum foil layer 9 is made of aluminum foil, which has extremely high light reflectivity, enabling it to efficiently reflect the light emitted by the backlight module back into the module, reducing light leakage. Simultaneously, the aluminum foil is thin and lightweight, not adding to the thickness of the display module, meeting the strict space requirements of ultra-narrow bezels. Furthermore, the aluminum foil has excellent moisture-proof and oxidation-proof properties, effectively protecting the internal materials and extending the lifespan of the light-shielding membrane. The inner polyethylene terephthalate layer 10 is made of black PET polyethylene terephthalate film. This film has excellent optical properties, with strong absorption capacity for visible and near-infrared light, further blocking light penetration. The PET film also has high mechanical strength and flexibility, making it resistant to breakage and deformation. During application, it adheres tightly to the surface of the backlight module, ensuring a light-shielding effect.

[0032] The polyurethane coating 11 uses a polyurethane (PU) coating, which has excellent wear resistance and scratch resistance. It can effectively resist friction and scratches between the display module and other components during assembly and use, and protect the internal light-shielding structure from damage. At the same time, the polyurethane coating also has good chemical corrosion resistance and can resist the erosion of cleaning agents, moisture and other substances.

[0033] The polycarbonate layer 12 is made of polycarbonate (PC) film. Polycarbonate film has high hardness and toughness, which enhances the overall mechanical properties of the light-blocking Mylar, making it less prone to breakage under external impact. Furthermore, the polycarbonate film also has good dimensional stability, maintaining its shape and performance under different temperature environments, ensuring the long-term reliable functioning of the light-blocking Mylar.

[0034] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0035] The above provides a detailed description of the anti-light leakage device for an ultra-narrow bezel touch display module provided by this utility model. Specific embodiments have been used to illustrate the principle and implementation of this utility model. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core idea of ​​this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principle of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A light leakage prevention device for an ultra-narrow bezel touch display module, characterized in that, include: A backlight module (1) is provided with a light-shielding Mylar (2) on top of the backlight module (1). A cover plate (3) is provided on top of the backlight module (1). A backlight iron frame (4) is fixedly installed on the back side of the cover plate (3). Two photosensitive holes (5) are opened on the top of the cover plate (3). The light-shielding Mylar (2) includes a high light-shielding and reflective layer (7) and a wear-resistant protective layer (8).

2. The anti-light leakage device for an ultra-narrow bezel touch display module according to claim 1, characterized in that, The front side of the backlight iron frame (4) is provided with a double-sided adhesive layer (6), and the light-blocking Mylar (2) is attached to the double-sided adhesive layer (6).

3. The anti-light leakage device for an ultra-narrow bezel touch display module according to claim 1, characterized in that, The cover plate (3) and the backlight iron frame (4) are made of steel, and the photosensitive hole (5) is connected to the display module.

4. The anti-light leakage device for an ultra-narrow bezel touch display module according to claim 1, characterized in that, A groove is provided on one side of the backlight iron frame (4), and the light-blocking Mylar (2) fits into the groove.

5. The anti-light leakage device for an ultra-narrow bezel touch display module according to claim 1, characterized in that, The high light-shielding reflective layer (7) includes an aluminum foil outer layer (9) and a polyethylene terephthalate inner layer (10), wherein the polyethylene terephthalate inner layer (10) is fixedly connected to one side of the aluminum foil outer layer (9).

6. The anti-light leakage device for an ultra-narrow bezel touch display module according to claim 1, characterized in that, The wear-resistant protective layer (8) includes a polyurethane coating (11) and a polycarbonate layer (12). The polyurethane coating (11) is fixedly connected to one side of the polyethylene terephthalate inner layer (10), and the polycarbonate layer (12) is fixedly connected to one side of the polyurethane coating (11).

7. The anti-light leakage device for an ultra-narrow bezel touch display module according to claim 5, characterized in that, The outer layer (9) of the aluminum foil is made of aluminum foil, and the inner layer (10) of polyethylene terephthalate is made of polyethylene terephthalate.

8. The anti-light leakage device for an ultra-narrow bezel touch display module according to claim 6, characterized in that, The polyurethane coating (11) is made of polyurethane, and the polycarbonate layer (12) is made of polycarbonate.

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