Protective structure of resistive touch screen

Abstract

According to the protection structure of the resistive touch screen, the magnetic field shielding layer with a conductive function is arranged on the resistive touch screen, and the magnetic field shielding layer is used for shielding external electromagnetic interference. Therefore, the service life of the touch screen is obviously prolonged, and the anti-electromagnetic interference capability of the whole product is also improved. In a severe environment, the resistance touch screen has high anti-scraping capability, and meanwhile, the resistance touch screen has high anti-electromagnetic interference capability.

Description

Technical Field

[0001] The utility model relates to the technical field of display devices, in particular to a protective structure of a resistive touch screen. Background Art

[0002] In harsh environments, resistive touch screens require high scratch resistance and high anti-electromagnetic interference capabilities. The surface of existing resistive touch screens is a nickel-gold-PET conductive layer, which is easily scratched or damaged during regular use, causing the touch screen to fail. It also does not have anti-electromagnetic interference capabilities. In a high electromagnetic interference environment, the interference magnetic field easily enters the device from the touch display area, resulting in low performance of the resistive touch screen. Utility Model Content

[0003] In view of this, the utility model provides a protective structure for a resistive touch screen, which solves the technical problem of low functionalities of existing products.

[0004] A protective structure for a resistive touch screen is provided on the resistive touch screen. A magnetic field shielding layer with a conductive function is arranged on the resistive touch screen. The magnetic field shielding layer is used to shield external electromagnetic interference.

[0005] Preferably, the magnetic field shielding layer includes an anti-scratch film arranged on the front side of the resistive touch screen, and the anti-scratch film is used for protecting the resistive touch screen.

[0006] Preferably, the anti-scratch film is made of a light-transmitting, transparent material, and the size of the anti-scratch film is adapted to the size of the resistive touch screen.

[0007] Preferably, the anti-scratch film is bonded to the front side of the resistive touch screen through a first OCA optical adhesive layer.

[0008] Beneficial Effects

[0009] A layer of PET anti-scratch film is added to the front of the screen, and OCA optical glue is filled between the front and the touch screen for bonding; a layer of PI / metal mixed shielding film is added to the back, and OCA optical glue is used to bond the back of the touch screen. A layer of copper foil is laminated around the front + side + back, 2.5mm wide, to meet the use in harsh environments, significantly improve the service life of the touch screen, and also improve the anti-electromagnetic interference ability of the entire product. It meets the needs of resistive touch screens in harsh environments, and has high anti-electromagnetic interference ability. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0011] Figure 1 It is a side view of a resistive touch screen;

[0012] Figure 2 It is a schematic diagram of the structure of the copper foil line, where:

[0013] 11. First line segment; 12. Transition line segment; 13. Second line segment; 2. Anti-scratch film; 3. First OCA optical adhesive layer; 4. Resistive touch screen; 5. Second OCA optical adhesive layer; 6. Shielding film. DETAILED DESCRIPTION

[0014] The embodiments of the present disclosure are described in detail below with reference to the accompanying drawings.

[0015] The following describes the embodiments of the present disclosure through specific examples, and those skilled in the art can easily understand other advantages and effects of the present disclosure from the contents disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present disclosure, rather than all of the embodiments. The present disclosure can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present disclosure. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present disclosure.

[0016] It should be noted that various aspects of the embodiments within the scope of the appended claims are described below. It should be apparent that the aspects described herein can be embodied in a wide variety of forms, and any specific structure and / or function described herein is merely illustrative. Based on the present disclosure, it should be understood by those skilled in the art that an aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number of aspects described herein can be used to implement the device and / or practice the method. In addition, other structures and / or functionalities other than one or more of the aspects described herein can be used to implement this device and / or practice this method.

[0017] It should also be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present disclosure. The drawings only show components related to the present disclosure rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0018] Additionally, in the following description, specific details are provided to facilitate a thorough understanding of the examples. However, one skilled in the art will appreciate that aspects may be practiced without these specific details.

[0019] See also Figure 1 The protective structure of the resistive touch screen shown in the figure is provided with a magnetic field shielding layer with a conductive function on the resistive touch screen 4. The magnetic field shielding layer is used to shield external electromagnetic interference and improve the performance of the resistive touch screen 4. Specifically, it includes the following structures:

[0020] The magnetic field shielding layer includes an anti-scratch film 2 disposed on the front of the resistive touch screen 4. The anti-scratch film 2 is used to protect the resistive touch screen 4, such as to prevent contamination of the screen. The anti-scratch film 2 is made of a light-transmitting, transparent PET material, and the size of the anti-scratch film 2 is adapted to the size of the resistive touch screen 4, and the anti-scratch film 2 is bonded to the front of the resistive touch screen 4 through a first OCA optical adhesive layer 3;

[0021] A shielding film 6 is provided on the back of the resistive touch screen 4. The shielding film 6 is used to shield external electromagnetic interference. The shielding film 6 is preferably made of a transparent PI / metal mixed material, and the shielding film 6 is bonded to the back of the resistive touch screen 4 through a second OCA optical adhesive layer 5. The shielding film 6 contacts the mounting shell to discharge the interference signal.

[0022] It should be pointed out that the resistive touch screen 4 is generally made of glass, and the OCA optical adhesive layer is light-transmissive and has the same refractive index as glass, which can prevent the light on the display screen from being refracted and avoid screen distortion or unclear display.

[0023] As a specific implementation method provided in this case, the resistive touch screen 4 is generally installed in a frame first, and then the whole is installed in the display device and connected to the circuit board. In order to facilitate the installation in the frame, there is no need to distinguish the front or back of the resistive touch screen 4. Figure 1 The side view of the resistive touch screen 4, the magnetic field shielding layer also includes a copper foil line arranged in a "concave" shape, such as Figure 2 As shown, the copper foil line includes a first line segment 11, a transition line segment 12 and a second line segment 13, wherein:

[0024] The first line segment 11 is arranged along each edge of the anti-scratch film 2 and forms a closed line segment;

[0025] The second line segment 13 is arranged along each edge of the shielding film 6 and forms a closed line segment;

[0026] The first line segment 11 is connected to the second line segment 13 through the transition line segment 12 to adapt to the normal or reverse installation of the resistive touch screen 4 in the assembly frame. Specifically, a copper foil with a width of 2.5 mm is used. The first line segment 11 is a 2.5 mm copper foil running around the front of the resistive touch screen 4, and the second line segment 13 is a 2.5 mm copper foil running around the back of the resistive touch screen 4. The first line segment 11 and the second line segment 13 are connected through the second line segment 13 (2.5 mm copper foil). Both ends of the whole are conductive. Therefore, when installing on the frame, there is no need to distinguish between the front and back sides.

[0027] The above is only a specific implementation of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present disclosure should be included in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.

Claims

1. A protective structure for a resistive touch screen, It is characterized in that A magnetic field shielding layer with a conductive function is provided on the resistive touch screen, and the magnetic field shielding layer is used to shield external electromagnetic interference, wherein: The magnetic field shielding layer includes an anti-scratch film arranged on the front of the resistive touch screen, and the anti-scratch film is used to protect the resistive touch screen; The magnetic field shielding layer further comprises a shielding film disposed on the back of the resistive touch screen, wherein the shielding film is used to shield external electromagnetic interference; The magnetic field shielding layer also includes a copper foil line arranged in a "concave" shape structure, and the copper foil line includes a first line segment, a transition line segment and a second line segment, wherein the first line segment is arranged along each edge of the anti-scratch film to form a closed line segment; the second line segment is arranged along each edge of the shielding film to form a closed line segment; the first line segment is connected to the second line segment through the transition line segment to adapt to the positive or reverse installation of the resistive touch screen in the assembly frame.

2. The protective structure according to claim 1, It is characterized in that The anti-scratch film is made of a light-transmitting and transparent material, and the size of the anti-scratch film is adapted to the size of the resistive touch screen.

3. The protective structure according to claim 1, It is characterized in that The anti-scratch film is bonded to the front side of the resistive touch screen through a first OCA optical adhesive layer.

4. The protective structure according to claim 1, It is characterized in that The shielding film is made of a transparent PI / metal mixed material.

5. The protective structure according to claim 1, It is characterized in that The shielding film is bonded to the back of the resistive touch screen through a second OCA optical adhesive layer.

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