Patent Publication Number: US-2022221632-A1

Title: Screen protector

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     The present application is a Divisional application of U.S. application Ser. No. 16/438,450 filed on Jun. 11, 2019, which claims priority to Taiwanese Patent Application No. 108103376 filed on Jan. 29, 2019, the entire contents of which are hereby incorporated by reference. 
    
    
     BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention relates to a protector, and in particular, to an adsorption screen protector. 
     2. Description of the Related Art 
     With the advancement of technology and the development of the Internet, mobile devices (such as smart phones, tablet computers, laptops, etc.) have become an indispensable item in people&#39;s lives. Since the mobile devices are very convenient to carry, they can be used in public occasions such as offices, public places or public transportation. 
     In general, the screens of the mobile devices currently available in the market do not have a peep-prevention function. Therefore, when the mobile device is used in public, the people around can easily peek at the display content on the screen, and the privacy of the user cannot be protected. Based on the foregoing problems, most of the current coping practices are to additionally attach a peep-prevention sheet to the screen of the mobile device to avoid easy peeping by others. However, the peep-prevention sheet is secured in a pasting mode, and the user needs to tear it off when it is not needed, and it is easy to leave residual glue after the tearing, which causes trouble and re-installation inconvenience. Even if the mobile device is used in a personal space, and there is no need to consider privacy protection temporarily, it is still not easy to remove the secured peep-protection sheet. If the peep-protection sheet is still secured on the screen in a safe environment, the brightness of the screen will be darkened and the sharpness of the picture will be reduced, and the original clear and high-contrast visual perception of the screen is reduced in long-term use, and thus, it is still needed to improve the peep-protection sheet. 
     To solve the foregoing problems, a product which is composed of a magnetic functional component and the peep-protection sheet has been developed in recent years. As shown in  FIG. 15A , such peep-protection sheet is to add a functional component B on the side of either surface of a protection sheet body A, and dispose the attaching bodies  3  at corresponding positions around the screen of the electronic device  2 , so that the user can secure the peep-protection sheet to the surface of the screen or take it down according to actual needs during use. 
     However, due to the trend of thinning of the hardware design of the electronic device, when the screen (located on the upper cover) of the electronic device such as a notebook computer is closed, the space formed by the inner surface of the screen and the inner surface of the keyboard is very limited. If a decorative or functional protruding structure is disposed on the outer surface of the peep-protection sheet, the upper cover of the notebook computer cannot be smoothly closed, and the sleep program executed by relevant components of the notebook computer which are originally triggered by closing the upper cover would be hindered. Furthermore, since the peep-protection sheet is effective in preventing peep by changing the visible light transmittance of different viewing angles, when the peep-protection sheet is secured to the screen surface, the functional component B protruding from the protection sheet body A may cause the protection sheet body A to incline toward the other side where no functional component is installed, and thus the protection sheet body A cannot be disposed in parallel to the screen surface, as shown in  FIG. 17B , and the user&#39;s visibility when viewing the screen would be affected. 
     Because the key materials, key technologies and mass production technologies for producing the viewing angle limitation effect of the peep-protection sheet have been mastered by a few material companies in the past 20 years, the development of the attachment technology of the peep-protection sheet to the screen of the electronic device is only limited to attaching a protruding structure at the outer surface of the peep-protective sheet. Therefore, it is imperative that all walks of life can develop a novel screen protector that can achieve the effect of easy and quick disassembly and assembly, and can also achieve the overall thinning effect of the screen protector. 
     SUMMARY OF THE INVENTION 
     In view of the foregoing problems, the inventors have diligently studied and searched for various possible solutions for solving the foregoing problems of the conventional technology, and have developed a novel technology of integrating sheet a functional component (for example, a ferromagnetic attaching element) and/or a decorative component (such as a pigment/paint layer or a pattern film) and the grating sheet inside the peep-prevention sheet in the same layer, so as to achieve the overall thinning effect of the screen protector, thereby solving the technical problem of how to not inclined or bend the functional components and two flat components of different materials of the grating sheet at the junction when they are integrated into the same layer. Furthermore, the upper cover can be smoothly closed when the screen protector is used to adsorb the screen of the notebook computer, so that the notebook computer can smoothly trigger the sleep program. Moreover, the solution of the present invention that the screen protector can achieve the effect of easy and quick disassembly and assembly, without adding an external protruding structure can achieve the effect of providing the functional components and the decorative components on the screen protector. 
     In other words, the present invention provides a manufacturing method of a screen protector, wherein the screen protector is a laminated structure having a flat outer surface without an interval and at least comprising a first outer cover film, a functional layer composed of a grating sheet and an attaching member, and a second outer cover film and is configured to be disposed on an attaching body on an electronic device in an attaching mode to correspondingly cover a display screen of the electronic device, and the manufacturing method comprises the following steps: a sheet punching step: sheets constituting the first outer cover film, the second outer cover film, the grating sheet, and the attaching member are cut into specific sizes, respectively; a functional layer forming step: the grating sheet and the attaching member are disposed and attached to a front surface of the second outer cover film to form the functional layer, and the attaching member is disposed adjacent to the grating sheet side-by-side; a half-finished product forming step: a rear surface of the first outer cover film is bonded to the grating sheet and the attaching member to form a half-finished product; and a heating and pressing defoaming step: vacuum-pressing is performed on the half-finished product under appropriate conditions, to remove bubbles inside the half-finished product, and the surface of the half-finished product is flattened to obtain the screen protector. 
     In an embodiment of the present invention, prior to the functional layer forming step, the method further comprises an adhesive layer applying step: a viscous adhesive material is respectively applied to the rear surface of the first outer cover film and the front surface of the second outer cover film respectively, to forma first adhesive layer and a second adhesive layer. 
     In an embodiment of the present invention, in the functional layer forming step, the grating sheet and the attaching member are attached to the front surface of the second outer cover film through the second adhesive layer; and in the half-finished product forming step, the grating sheet and the attaching member are attached to the rear surface of the first outer cover film through the first adhesive layer. 
     In an embodiment of the present invention, the grating sheet has a visual range within a specific angle. The grating sheet comprises an outer layer and a grating layer, and the grating layer comprises a plurality of grating walls. 
     In an embodiment of the present invention, there is one or a plurality of attaching members. 
     In addition, the present invention may further provide a screen protector, wherein the screen protector is a laminated structure having a flat outer surface without an interval and at least comprising a first outer cover film, a functional layer composed of a grating sheet and a first attaching member, and a second outer cover film and is configured to be disposed on an attaching body on an electronic device in an attaching mode to correspondingly cover a display screen of the electronic device, wherein the grating sheet is configured to define a viewing zone to limit penetrable light to an allowable viewing angle range; the first attaching member is configured to define an adsorption zone and is disposed vertically adjacent to the grating sheet side-by-side, and the attaching member is located above the grating sheet; and the grating sheet and the first attaching member are coated with the first outer cover film and the second outer cover film, so that the grating sheet and the first attaching member are located between the first outer cover film and the second outer cover film. The first attaching member, the first outer cover film and the second outer cover film each have an opening corresponding to each other, and the opening is configured to correspond to a functional component on the electronic device and avoid covering the functional component, wherein the openings of the first attaching member, the first outer cover film, and the second outer cover film are through holes defined by a closed inner edge, or notches that are open on one side and defined by the inner edges of three sides. The first attaching member is separated by a gap into two half-attaching members that are disposed in left and right sides and aligned with each other, and the first outer cover film and the second outer cover film each have an opening corresponding to the gap; the gap and the opening are configured to correspond to a functional component on the electronic device and avoid covering the functional component, wherein the openings of the first outer cover film and the second outer cover film are notches that are open on one side and defined by the inner edges of three sides. The screen protector further comprises a second attaching member, the second attaching member and the first attaching member are respectively disposed opposite at the side of the grating sheet, and are disposed vertically adjacent to the grating sheet side-by-side, and the second attaching member is located below the grating sheet, so that the first attaching member, the grating sheet and the second attaching member are sequentially arranged from top to bottom, and are disposed together between the first outer cover film and the second outer cover film. The first attaching member is ring-shaped and has a main opening for embedding the grating sheet, so that an outer periphery of the grating sheet is adjacent to an inner periphery of the main opening. The screen protector further comprises a third attaching member, and a corner of a bottom edge of the grating sheet has a retracted truncated side, and the third attaching member has an inner side aligned with and adjacent to the truncated side of the grating sheet, so that the third attaching member is disposed at the corner of the bottom edge of the grating sheet. The screen protector further comprises a third attaching member disposed at a corner of a bottom edge of the grating sheet, and the third attaching member is rectangular, right-triangular or L-shaped. The screen protector further comprises a decorative layer disposed on a front surface and/or a rear surface of the first attaching member, or on front surfaces and/or rear surfaces of the first outer cover film and the second outer cover film, and corresponding to the first attaching member. The first attaching member extends along a long side and/or a short side of the grating sheet. The screen protector further comprises a transparent first adhesive layer and a second adhesive layer configured to attach the grating sheet and the first attaching member between the first outer cover film and the second outer cover film, respectively. The screen protector, wherein the grating sheet comprises an outer layer and a grating layer, and the grating layer comprises a plurality of grating walls. The screen protector further comprises a tab, wherein the tab comprises two lugs which extend from the first outer cover film and the second outer cover film, respectively. The attaching body is correspondingly adsorbed with the attaching member, and is affixed to the electronic device by default, or is freely attached to the outer surface of the electronic device. 
     Moreover, the present invention can also provide a screen protector, wherein the screen protector is a laminated structure having a flat outer surface without an interval and at least comprising a first outer cover film, a functional layer composed of a grating sheet, a first attaching member and two third attaching members, and a second outer cover film and is configured to be disposed on an attaching body on an electronic device in an attaching mode to correspondingly cover a display screen of the electronic device, wherein the grating sheet is configured to define a viewing zone to limit penetrable light to an allowable viewing angle range; the first attaching member is configured to define an adsorption zone and is disposed vertically adjacent to the grating sheet side-by-side, and the attaching member is located above the grating sheet; the two third attaching members are disposed at two corners of the bottom edges of the grating sheet; and the grating sheet, the first attaching member and the two third attaching members are coated with the first outer cover film and the second outer cover film, so that the grating sheet, the first attaching member and the two third attaching members are located between the first outer cover film and the second outer cover film. The first attaching member, the first outer cover film and the second outer cover film each have an opening corresponding to each other, and the opening is configured to correspond to a functional component on the electronic device and avoid covering the functional component, wherein the openings of the first attaching member, the first outer cover film, and the second outer cover film are through holes defined by a closed inner edge, or notches that are open on one side and defined by the inner edges of three sides. The first attaching member is separated by a gap into two half-attaching members that are disposed in left and right sides and aligned with each other, and the first outer cover film and the second outer cover film each have an opening corresponding to the gap; the gap and the opening are configured to correspond to a functional component on the electronic device and avoid covering the functional component, wherein the openings of the first outer cover film and the second outer cover film are notches that are open on one side and defined by the inner edges of three sides. A corner of a bottom edge of the grating sheet has a retracted truncated side, and the third attaching member has an inner side aligned with and adjacent to the truncated side of the grating sheet, so that the third attaching member is disposed at the corner of the bottom edge of the grating sheet. The screen protector further comprises a third attaching member, and a corner of a bottom edge of the grating sheet has a pair of retracted truncated sides, and the third attaching member has a pair of inner sides aligned with and adjacent to the pair of truncated sides of the grating sheet, so that the third attaching member is disposed at the corner of the bottom edge of the grating sheet. The third attaching member is rectangular, right-triangular or L-shaped. The screen protector further comprises a decorative layer disposed on a front surface and/or a rear surface of the first attaching member and/or the third attaching member, or on front surfaces and/or rear surfaces of the first outer cover film and the second outer cover film, and corresponding to the first attaching member and/or the third attaching member. The first attaching member extends along a long side and a short side of the grating sheet. The attaching body is correspondingly adsorbed with the attaching member, and is affixed to the electronic device by default, or is freely attached to the outer surface of the electronic device. 
     Furthermore, the present invention also provides a screen protector, wherein the screen protector is a laminated structure having a flat outer surface without an interval and at least comprising a first outer cover film, a functional layer composed of a grating sheet and a first attaching member, and a second outer cover film and is configured to be disposed on an attaching body on an electronic device in an attaching mode to correspondingly cover a display screen of the electronic device, wherein the grating sheet is configured to define a viewing zone to limit penetrable light to an allowable viewing angle range; the first attaching member is configured to define an adsorption zone and is disposed vertically adjacent to the grating sheet side-by-side, and the attaching member is located above the grating sheet; and the grating sheet and the first attaching member are coated with two transparent outer cover film so that the grating sheet and the first attaching member are located between the first outer cover film and the second outer cover film, wherein the first attaching member is separated by a gap into two half-attaching members that are disposed in left and right sides and aligned with each other, and the first outer cover film and the second outer cover film each have an opening corresponding to the gap; the gap and the openings are configured to correspond to a functional component on the electronic device and avoid covering the functional component, wherein the openings of the first outer cover film and the second outer cover film are notches that are open on one side and defined by the inner edges of three sides, wherein the screen protector is adsorbed to the attaching body on the electronic device through the attaching member, so that the grating sheet correspondingly covers the display screen of the electronic device. The screen protector further comprises a second attaching member, the second attaching member and the first attaching member are respectively disposed opposite at the side of the grating sheet, and are disposed vertically adjacent to the grating sheet side-by-side, and the second attaching member is located below the grating sheet, so that the first attaching member, the grating sheet and the second attaching member are sequentially arranged from top to bottom, and are disposed together between the first outer cover film and the second outer cover film. The two half-attaching members of the first attaching member are annularly connected along the outer periphery of the grating sheet to form a ring shape, and a main opening is formed for embedding the grating sheet, so that the outer periphery of the grating sheet is adjacent to an inner periphery of the main opening. The gap is disposed along a long side and/or a short side of the grating sheet. The screen protector further comprises a third attaching member disposed at a corner of a bottom edge of the grating sheet, and the third attaching member is rectangular, right-triangular or L-shaped. The screen protector further comprises a decorative layer disposed on front surfaces and/or rear surfaces of the two half-attaching members, or on front surfaces and/or rear surfaces of the first outer cover film and the second outer cover film, and corresponding to the two half-attaching members. The two half-attaching members extend along a long side and/or a short side of the grating sheet. The attaching body is correspondingly adsorbed with the attaching member, and is affixed to the electronic device by default, or is freely attached to the outer surface of the electronic device. 
     Thereby, the screen protector of the present invention reverses the design direction of the externally added components that have not been solved for decades, and the attaching member is disposed adjacent to the grating sheet side-by-side, and is coated with, at the front and back, the two outer cover films. The functional components and decorative components are successfully integrated into the same layer as the grating sheet, and the screen protector is further thinned while maintaining its original fast adsorption removal function and decorative requirements. Moreover, the screen protector of the present invention can provide sufficient structural strength through two outer cover films and the attachment of the first adhesive layer and the second adhesive layer, so that two independent planar components, i.e., the grating sheet and the attaching member are not inclined or bent at the junction. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is an exploded perspective view showing an embodiment of a screen protector  1  according to the present invention. 
         FIG. 2A  is a perspective view showing an embodiment of the screen protector  1  according to the present invention. 
         FIG. 2B  is a partial enlarged view showing a region  2 H in  FIG. 2A . 
         FIG. 2C  is a partial enlarged view showing a region  2 I in  FIG. 2A . 
         FIG. 3A  is an exploded perspective view showing the screen protector  1  and an electronic device in  FIG. 1 . 
         FIG. 3B  is an exploded perspective view showing the screen protector  1  and the electronic device in  FIG. 1 . 
         FIG. 3C  is an exploded perspective view showing the screen protector  1  and the electronic device in  FIG. 1 . 
         FIG. 4A  is a sectional view showing an embodiment of a grating sheet in  FIG. 1 . 
         FIG. 4B  is a sectional view showing another embodiment of the grating sheet in  FIG. 1 . 
         FIG. 5  is an exploded perspective view showing another embodiment of the screen protector  1  according to the present invention. 
         FIG. 6  is an exploded perspective view showing another embodiment of the screen protector  1  according to the present invention. 
         FIG. 7A  is an exploded perspective view showing another embodiment of the screen protector  1  according to the present invention. 
         FIG. 7B  is a cross-sectional view of the screen protector  1  of  FIG. 7A . 
         FIG. 8  is an exploded perspective view showing another embodiment of the screen protector  1  according to the present invention. 
         FIG. 9  is an exploded perspective view showing another embodiment of the screen protector  1  according to the present invention. 
         FIG. 10A  is a perspective view showing another embodiment of the screen protector  1  according to the present invention. 
         FIG. 10B  is a partial enlarged view showing a region  10 H in  FIG. 10A . 
         FIG. 10C  is a perspective view showing application of a solution of an opening  34 ′/ 24 ′/ 44 ′ in  FIG. 10A / 10 B to the embodiment of the screen protector  1  of  FIG. 6  according to the present invention. 
         FIG. 10D  is a perspective view showing application of the solution of an opening  34 ′/ 24 ′/ 44 ′ in  FIG. 10A / 10 B to the embodiment of the screen protector  1  of  FIG. 9  according to the present application. 
         FIG. 10E  is a perspective view showing application of the solution of an opening  34 ′/ 24 ′/ 44 ′ in  FIG. 10A / 10 B to the embodiment of the screen protector  1  of  FIG. 7A  according to the present application. 
         FIG. 11A  is a perspective view showing another embodiment of the screen protector  1  according to the present invention. 
         FIG. 11B  is a partial enlarged view showing a region  11 H in  FIG. 11A . 
         FIG. 11C  is a perspective view showing application of a solution of an opening  34 ″/ 44 ″ and a gap  24 ″ in  FIG. 11A / 11 B to the embodiment of the screen protector  1  of  FIG. 6  according to the present invention. 
         FIG. 11D  is a perspective view showing application of a solution of the opening  34 ′/ 44 ′ and the gap  24 ′ in  FIG. 11A / 11 B to the embodiment of the screen protector  1  of  FIG. 9  according to the present invention. 
         FIG. 11E  is a perspective view showing application of a solution of the opening  34 ′/ 24 ′/ 44 ′ in  FIG. 10A / 10 B to the embodiment of the screen protector  1  of  FIG. 8  according to the present invention. 
         FIG. 12A  is a perspective view showing another embodiment of the screen protector  1  according to the present invention. 
         FIG. 12B  is a perspective view showing another embodiment of the screen protector  1  according to the present invention. 
         FIG. 13A  is a perspective view showing another embodiment of the screen protector  1  according to the present invention. 
         FIG. 13B  is a perspective view showing another embodiment of the screen protector  1  according to the present invention. 
         FIG. 14A  is a perspective view showing another embodiment of the screen protector  1  according to the present invention. 
         FIG. 14B  is a partial enlarged view showing a region  14 H in  FIG. 14A . 
         FIG. 14C  is a partially enlarged perspective view showing another embodiment of the screen protector  1  according to the present invention. 
         FIG. 15A  is a partially enlarged perspective view showing another embodiment of the screen protector  1  according to the present invention. 
         FIG. 15B  is a partially enlarged perspective view showing another embodiment of the screen protector  1  according to the present invention. 
         FIG. 15C  is a partially enlarged perspective view showing another embodiment of the screen protector  1  according to the present invention. 
         FIG. 16A  is a perspective view showing another embodiment of the screen protector  1  according to the present invention. 
         FIG. 16B  is a front view showing implementation of the solution of  FIG. 16A  in the embodiment of  FIG. 11C  according to another embodiment of the screen protector  1  of the present invention. 
         FIG. 16C  is a front view showing implementation of the solution of  FIG. 16A  in the embodiment of  FIG. 10C  according to another embodiment of the screen protector  1  of the present invention. 
         FIG. 16D  is a front view showing implementation of the solution of  FIG. 16A  in the embodiment of  FIG. 6  according to another embodiment of the screen protector  1  of the present invention. 
         FIG. 16E  is a front view showing implementation of the solution of  FIG. 16A  in the embodiment of  FIG. 11D  according to another embodiment of the screen protector  1  of the present invention. 
         FIG. 16F  is a front view showing implementation of the solution of  FIG. 16A  in the embodiment of  FIG. 10D  according to another embodiment of the screen protector  1  of the present invention. 
         FIG. 16G  is a front view showing implementation of the solution of  FIG. 16A  in the embodiment of  FIG. 9  according to another embodiment of the screen protector  1  of the present invention. 
         FIG. 17A  is a schematic sectional view showing a conventional screen protector. 
         FIG. 17B  is a partial enlarged view showing a region  17 H in  FIG. 17A . 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     The technical means by which the present invention is intended to achieve the intended inventive purpose is further illustrated below with the drawings and the preferred embodiments of the present invention. The accompanying drawings are provided for reference and description to the detailed description and technical content of the present invention only and are not intended to limit the present invention. In the following description of the present invention, the orientation or positional relationships indicated by the terms “up”, “down”, “left”, “right”, “top”, “bottom”, “inside”, and “outside”, etc., are based on the orientation or positional relationships shown in the drawings, and are merely intended to facilitate simplifying the description of the present invention, instead of indicating that the devices or components in the description must have a specific orientation and are constructed and operated in a specific orientation, and thus cannot be understood as the limitations of the present invention. 
     The screen protector disclosed in the embodiments of the present invention is based on the following design considerations. First, due to the trend of thinning of the hardware design of the electronic device, when the screen (located on the upper cover) of the electronic device such as a notebook computer is closed, the space formed by the inner surface of the screen and the inner surface of the keyboard is very limited. If a decorative or functional protruding structure is disposed on the outer surface of the peep-protection sheet, the upper cover of the notebook computer cannot be smoothly closed, and the sleep program executed by relevant hardware and software of the notebook computer which are originally triggered by closing the upper cover would be hindered. Therefore, the screen protector of the embodiments of the present invention tends not to have a protruding structure attached to the outer surface thereof to further reduce the thickness of the screen protector. However, this will encounter major technical problems. 
     Because the key materials, key technologies and mass production technologies for producing the viewing angle limitation effect of the peep-protection sheet have been mastered by a few material companies in the past 20 years, the development of the attachment technology of the peep-protection sheet to the screen of the electronic device is only limited to attaching a protruding structure at the outer surface of the peep-protective sheet. Therefore, the screen protector of the present invention must overcome the technical development limitations that are sustainable for a long term, that is, the functional components (such as ferromagnetic attaching members) and/or decorative components (such as artificial leather or a colored paint layer) can only be designed outside the peep-protection sheet. In order to solve such a problem, the present invention integrates the functional components (such as ferromagnetic attaching members) and/or decorative members (such as a pigment/paint layer or a pattern film) with a grating sheet inside the peep-protection sheet in the same layer, so as to achieve the overall thinning effect of the screen protector. Furthermore, the upper cover can be smoothly closed when the screen protector is used to adsorb the screen of the notebook computer, so that the notebook computer can smoothly trigger the sleep program. Moreover, the solution that the screen protector can achieve the effect of easy and quick disassembly and assembly, without adding an external protruding structure can achieve the effect of providing the functional components and the decorative components on the screen protector. Then, another technical problem that needs to be overcome when the functional components and the grating sheet are integrated on the same layer is how to make two independent planar components of different materials not be inclined or bent at the junction. 
     The following embodiment drawings of the present invention will be described with reference to the coordinate system of  FIG. 1 . The arrow L direction represents the left side, the arrow R direction represents the right side, the arrow U direction represents the upper side or the top side, and the arrow B direction represents the lower side or the bottom side, the arrow F direction represents the front side or the front surface, and the arrow R direction represents the back side or the rear surface. 
       FIG. 1  is an exploded perspective view showing an embodiment of a screen protector  1  according to the present invention. In this embodiment, the screen protector  1  is substantially rectangular and comprises a grating sheet  10  and a first attaching member  20  disposed between a transparent first outer cover film  30  and a second outer cover film  40 . 
     A manufacturing method of a screen protector of the present invention is described in detail below. The manufacturing method comprises the following steps: 
     A sheet punching step S 1 : sheets constituting the first outer cover film, the second outer cover film, the grating sheet, and the first attaching member are cut into specific sizes, respectively. 
     A functional layer forming step S 2 : the grating sheet and the attaching member are disposed and attached to a front surface of the second outer cover film to form the functional layer, and the attaching member is disposed adjacent to the grating sheet side-by-side. 
     A semi-finished product forming step S 3 : a lower surface of the first outer cover film is bonded to the grating sheet and the attaching member to form a semi-finished product. 
     A heating and pressing defoaming step S 4 : vacuum-pressing is performed on the semi-finished product under appropriate conditions, to remove bubbles inside the semi-finished product, and the surface of the semi-finished product is flattened to obtain the screen protector. 
     In the sheet punching step S 1 , the sheets constituting the first outer cover film  30 , the second outer cover film  40 , the grating sheet  10 , and the first attaching member  20  are respectively cut into specific shapes by a punching machine, the height of a tool face of a cutting die used in the punching machine is 23.6 mm, and the inclination of tool points on both sides is 15°. In addition, during punching of the grating sheet  10 , the punch angle must be adjusted according to the screen resolution of corresponding electronic device. For example, if the screen resolution is 1366×768, the punch angle is 11 degrees, and if the screen resolution is 1920×1080, the punch angle is 15 degrees. In addition, the shape and size of the screen protector  1  correspondingly match those of a screen of the electronic device. In this embodiment, the grating sheet  10 , the first outer cover film  30  and the second outer cover film  40  are substantially rectangular sheets respectively, and the first attaching member  20  is an elongated sheet, wherein the first outer cover film  30  and the second outer cover film  40  are of the same size, and shapes and sizes of the combined and spliced grating sheet  10  and the first attaching member  20  are the same as those of the first outer cover film  30  and the second outer cover film  40 . In different embodiments, the total thickness actually achieved by the screen protector  1  is preferably only about 0.4-0.50 mm plus or minus 5-10%, which is difficult to visually recognize the structure thereof. For convenience of description, the geometrical proportions of the screen protector  1  structure in the respective embodiment drawings are adjusted. Compared with the traditional peep-protection sheet, the functional component and the decorative component are disposed on the outer surface of 0.95-1.4 mm plus or minus 10-15%, and the screen protector  1  of the present invention substantially reduces the thickness by 58%-65%, and it conforms to the space application trend of thinning and narrow bezel structure on modern electronic devices. 
     Then, reference is made to  FIGS. 1, 2A / 2 B/ 2 C, and  3 A together.  FIG. 2A  is a perspective view of an embodiment of a screen protector  1  of the present invention;  FIG. 2B  is a partial enlarged view of a region  2 H in  FIG. 2A ;  FIG. 2C  is a partial enlarged view of the region  2 I of  FIG. 2A ; and  FIG. 3A  is an exploded perspective view of the screen protector  1  and an electronic device  2  of  FIG. 1 . 
     In this embodiment, the grating sheet  10  and the first attaching member  20  are disposed vertically adjacent to each other side-by-side, and the first attaching member  20  is disposed above the grating sheet  10 . In an embodiment, a bottom edge  22  of the first attaching member  20  is aligned with and adjacent to a top edge  11  of the grating sheet  10 , and both may be adhesively fixed or merely adjacent to each other. In an example, two side edges  23 A/ 23 B of the first attaching member  20  can be vertically aligned with two side edges  13 A/ 13 B of the grating sheet  10 , respectively. In a preferred embodiment, the attaching member  20  has the same or approximate thickness as the grating sheet  10 , and the attaching member  20  can also have a smaller thickness than the grating sheet  10 . 
     In the functional layer forming step S 2 , the two side edges  13 A/ 13 B and a bottom edge  12  of the grating sheet  10  are respectively aligned with and attached to two side edges  43 A/ 43 B and a bottom edge  42  of the second outer cover film  40 , and the two side edges  23 A/ 23 B and a top edge  21  of the first attaching member  20  are respectively aligned with and attached to top sections of the top side edges  43 A/ 43 B and a top edge  41  of the second outer cover film  40 , so that the grating sheet  10  and the first attaching member  20  form a functional layer in the same plane. Then, in the semi-finished molding step S 3 , two side edges  33 A/ 33 B and a bottom edge  32  of the first outer cover film  30  are respectively aligned with and attached to the side edges  13 A/ 13 B and the bottom edge  12  of the grating sheet  10 , and the top sections of the top side edges  33 A/ 33 B and the top edge  31  of the first outer cover film  30  are respectively aligned with and attached to the two side edges  23 A/ 23 B and the top edge  21  of the first attaching member  20 , thereby forming a semi-finished product of the screen protector  1 . 
     Then, in the heating and pressing defoaming step S 4 , an appropriate pressure P and temperature T are applied to the semi-finished product for a vacuum-pressing duration X, to remove bubbles inside the semi-finished product, and the surface of the semi-finished product is flattened to obtain the screen protector  1 . The pressure P, the temperature T, and the time X depend on the thickness and material of the sheet. For example, the pressure P is generally in the range of 0.5 to 30 Kg/cm 2 , preferably in the range of 0.5 to 25 Kg/cm 2 , more preferably in the range of 2.5 to 20 Kg/cm 2 , and most preferably in the range of 2.5 to 15 Kg/cm 2 . In addition, the temperature T is generally in the range of 30 to 90° C., preferably in the range of 35 to 80° C., more preferably in the range of 35° C. to 75° C., and most preferably in the range of 35° C. to 70° C. Moreover, the time X is generally in the range of 10 to 100 min, preferably in the range of 10 to 90 min, more preferably in the range of 20 to 90 min, and most preferably in the range of 25 to 80 min. 
     Through the steps, the top region of the first outer cover film  30 , the first attaching member  20 , and the top region of the second outer cover film  40  form adsorption zones  1 A which are sequentially stacked and have corresponding areas, and the main region of the first outer cover film  30 , the grating sheet  10 , and the main portion of the second outer cover film  40  also form viewing zones  1 B which are sequentially stacked and have corresponding areas, below the adsorption zones  1 A. 
     Therefore, as shown in  FIG. 3A , the first attaching member  20  is disposed in the adsorption zone  1 A of the screen protector  1 , so that the screen protector  1  can be correspondingly adsorbed to an attaching body  3  outside a screen  4  of an electronic device  2  through the first attaching member  20 . In this embodiment, the electronic device  2  is a notebook computer, and the attaching body  3  is disposed inside the electronic device  2  and located above the display screen  4  for aligning the attaching member  20  of the screen protector  1 . In  FIG. 3A , the attaching member  20  of the screen protector  1  and the attaching body  3  of the electronic device  2  can be respectively made of magnetic materials of different magnetic poles (for example, one of a group consisting of ferrite, aluminum-nickel-cobalt alloy, or rare-earth magnets or any combination thereof); or, one of the first attaching member  20  and the attaching body  3  is a magnet, and the other is a ferromagnetic member (for example, a single metal member or a multi-metal alloy member such as iron, nickel or cobalt that can be magnetically attracted, which can be used as a part of a casing or a structural member), so that the first attaching member  20  and the attaching body  3  can attract each other. In some embodiments, the first attaching member  20  can be realized by a thinned elongated metal sheet/metal strip, a magnetic/ferromagnetic sheet, or a coating containing a metal or magnetic/ferromagnetic material. Therefore, the first attaching member  20  can be adsorbed to the attaching body  3  by using the magnetic attraction principle when the screen protector  1  approaches the attaching body  3  of the electronic device  2  with the first attaching member  20 , so that the adsorption zone  1 A of the screen protector  1  is fixed on the electronic device  2 , and the viewing zone  1 B of the screen protector  1  covers the display screen  4  of the electronic device  2  to achieve the effect of avoiding peeping by others. In addition, if the user has the need for disassembly, the attaching member  20  of the screen protector  1  can be removed from the attaching body  3  of the electronic device  2 , and the detachment is easy and quick. 
       FIGS. 3B and 3C  are respectively exploded perspective views of the screen protector  1  and the electronic device  2  of  FIG. 1 . Different from  FIG. 3A , in  FIGS. 3B and 3C , no attaching member  3  is disposed outside the display screen  4  of the electronic device  2 , and the screen protector  1  further includes a separate attaching body  3 T or two attaching bodies  3 T′, the attaching body  3 T/ 3 T′ has ferromagnetic properties and has an adhesive surface for adhering to the outside of the display screen  4  on the electronic device  2 . In  FIGS. 3B and 3C , the attaching member  20  and the attaching bodies  3 T/ 3 T′ of the screen protector  1  can be respectively made of magnetic materials of different magnetic poles (for example, one of a group consisting of ferrite, aluminum-nickel-cobalt alloy, or rare-earth magnets or any combination thereof); or one of the first attaching member  20  and the attaching bodies  3 T/ 3 T′ is a magnet, and the other is a ferromagnetic member (for example, a single metal member or a multi-metal alloy member such as iron, nickel or cobalt that can be magnetically attracted), so that the attaching member  20  and the attaching bodies  3 T/ 3 T′ are attract each other. In some embodiments, the ferromagnetic properties of the attaching member  20  and the attaching bodies  3 T/ 3 T′ can be realized by a thinned elongated metal sheet/metal strip, a magnetic/ferromagnetic sheet, or a coating containing a metal or magnetic/ferromagnetic material. In some embodiments, the thickness of the attaching member  20  can be, for example, 0.1-0.5 mm plus or minus 5-20%, preferably 0.2-0.35 mm plus or minus 5-20%, and more preferably 0.30-0.35 mm plus or minus 5-20%. In different embodiments, the thickness of the attaching member can be, for example, between 0.4 mm and 0.7 mm, or in the range of 0.4, 0.5, 0.6 or 0.7 mm plus or minus 5-20%. 
     In addition, the attaching member  20  of the screen protector  1  in  FIG. 3A  is formed with an opening  24  corresponding to a visual sensor  5  of the electronic device  2  (for example, a camera including a CCD or CMOS component), the first outer cover film  30  and the second outer cover film  40  are also respectively formed with openings  34 / 44  corresponding to the opening  24  of the first attaching member. Thus, a hollow channel formed by the opening  34 , the opening  24  and the opening  44  which are sequentially communicated can prevent the visual sensor  5  from being covered by the screen protector  1  to lose its function, after the screen protector  1  is mounted on the electronic device  2 . The foregoing opening  34 , opening  24  and opening  44  are respectively through holes defined by a closed inner edge. Certainly, the opening  24  of the first attaching member  20  and the openings  34 / 44  of the first outer covering  30  and the second outer covering  40  can be formed in different shapes or in different positions, and other holes can be added as needed, so as to correspond to the visual sensor  5  or other functional components (such as a light source, a headphone jack or a function button) of the electronic device  2 . In  FIG. 3B , the attaching body  3 T has a shape and size corresponding to the attaching member  20  (extending along the long side of the grating sheet  10  in a strip shape), and the attaching body  3 T has an opening  3 T 0  corresponding to the opening  24  of the attaching member  20  and the openings  34 / 44  of the first outer cover film  30  and the second outer cover film  40  corresponding to the visual sensor  5  of the electronic device  2  to avoid covering it. In  FIG. 3C , the two attaching bodies  3 T′ whose width and length are less than half of the attaching member  20  are first attached to the outside of the display screen  4  of the electronic device  2 , and the left and right sides of the visual sensor  5 , to avoid covering the visual sensor  5 , and can be adsorbed corresponding to the attaching member  20 . In other words, the attaching body of the embodiments of the present invention is adsorbed corresponding to the attaching member, and is affixed to the electronic device by default, or is freely attached to the outer surface of the electronic device. 
     Referring to  FIGS. 4A and 4B ,  FIG. 4A  is a sectional view of an embodiment of the grating sheet  10  of  FIG. 1 , and  FIG. 4B  is a sectional view of another embodiment of the grating sheet  10  of  FIG. 1 . 
     As shown in  FIG. 4A , the grating sheet  10  includes two outer layers  101 ,  103  and a grating layer  102 , but the grating sheet  10  can also have only one outer layer  103 , as shown in  FIG. 4B , this embodiment is not limited thereto. The outer layers  101 ,  103  are resin layers made of high light transmissive materials. For example, the outer layers  101 ,  103  are made of Polyimide (PI), Polyethylene Terephthalate (PET), and Polycarbonate (PC), Poly-Methyl Methacrylate (PMMA), and Triacetyl Cellulose (TAC). The grating layer  102  is fixed between the two outer layers  101 ,  103 . For example, in  FIG. 4A , the outer layers  101 ,  103  are respectively adhered to two opposite surfaces of the grating layer  102 ; or as shown in  FIG. 4B , the grating layer  102  is fixed on the outer layer  103 . 
     In  FIGS. 4A and 4B , the grating layer  102  of the grating sheet  10  includes a plurality of opaque grating walls  1021 , which are arranged according to the Micro-louver principle. The light can be limited to a specific angle α by setting the grating walls  1021  in parallel and equidistantly (i.e., an upright louver structure). The grating walls  1021  can be directly printed on the outer layer  103  in a three-dimensional printing manner ( FIG. 4B ), or the outer layer  101  is attached after the grating walls  1021  are formed, so that the grating layers  102  (the grating walls  1021 ) are located between the two outer layers  101 ,  103 . In another embodiment, the grating layer  102  may be formed by slitting repeatedly stacked transparent and opaque materials. In other embodiments, the grating layer  102  is adhered to the outer layers  101 ,  103  through an adhesive layer, respectively. The grating sheet  10  has the same or approximate thickness as the attaching member  20 . In some embodiments, the overall thickness of the grating sheet  10  is in the range of 0.25, 0.30 to 0.35 mm plus or minus 5-20%. In different embodiments, the thickness of the attaching member can be, for example, between 0.25 mm and 0.7 mm, or in the range of 0.4, 0.5, 0.6 or 0.7 mm plus or minus 5-20%. Thus, the grating sheet  10  can only provide a visible range of a certain angle α, as shown by arrow V in the figure, which is the angle of facing the grating layer  102  (i.e., a zero angle), since the light is not blocked, the visibility is not affected. If the angle α deviation is larger, the brightness is lower, so that the effect of preventing peep and information confidentiality can be fully achieved. The change in the viewing angle of the grating sheet  10  can achieve the effect of preventing peep, which is closely related to the visible light transmittance of the grating sheet  10  at various viewing angles. For example, in a set of embodiments, the visible light of 550 nm wavelength is used to experiment with the viewing zone  1 B of the screen protector  1 . At the viewing angle θ, several sets of light transmittance data such as 52.13%, 54.16%, 56.66%, 59.86%, 61.55% and 64.22% can be obtained. At the viewing angle of 15°, the light transmittance data can still reach the level of 33.10%, 37.28% or 46.8%. However, once the left/right viewing angle of 30° is reached, the light transmittance data is sharply reduced below 10%, for example, 2.55%, 5.10% or 8.63%. In these embodiments, the allowable viewing angle range of the viewing zone  1 B of the screen protector  1  is only about 30 degrees to the left and right, for a total allowable viewing angle range of about 60 degrees. In other words, the grating sheet  10  and the grating layer  102  thereof are configured to limit the light passing through the viewing zone  1 B to an allowable viewing angle range. 
     The first outer cover film  30  and the second outer cover film  40  of an embodiment of the present invention can be, for example, made of PI, PET, PC, PMMA and TAC, and the materials constituting the first outer cover film  30  and the second outer cover film  40  may be the same or different. For the thicknesses of the first outer cover film  30  and the second outer cover film  40 , in some embodiments, the thicknesses of the first outer cover film  30  and the second outer cover film  40  can be, for example, in the range of 0.05, 0.075, 0.10, or 0.125 mm plus or minus 5-20%, which may include or may not include the thicknesses of the first outer cover film  30  and the second outer cover film  40  themselves and one or more coatings. The grating sheet  10  itself does not have sufficient structural strength to maintain the screen protector  1  in a flat plane when the grating sheet  10  itself, in particular only having a single outer layer  103 , provides a support surface for the grating layer  102 . Therefore, with the front and back attachment of the first outer cover film  30  and the second outer cover film  40 , the grating sheet  10  and the attaching member  20  can be maintained in the flat plane, that is, the screen protector  1  can be maintained as a whole in the flat plane, thereby conforming to the functional requirement of being flat on the display screen  4  of the electronic device  2  without warping. More importantly, the front and back attachment of the first outer cover film  30  and the second outer cover film  40  requires sufficient structural strength so that two independent planar components, i.e., the grating sheet  10  and the attaching member  20  are not inclined or bent at the junction. In addition, in order to meet the requirements of no fingerprint left after use, low glare, low reflected light, and scratch resistance, etc., the inner surfaces and/or the outer surfaces of the first outer cover film  30  and the second outer cover film  40  may have one or more coatings, the coating can be selected from one of a group consisting of an anti-fingerprint coating (of an ultra-low frictional coefficient), an anti-glare coating, an anti-reflection coating, an anti-blue light coating, and a hard coating, or any combination thereof. In some experimental examples, the anti-reflection coating can increase the transmittance of the screen protector  1  by 8-12%, thereby improving the low transmittance of the conventional screen protector  1 . 
     In addition, please refer to  FIG. 5 .  FIG. 5  is an exploded perspective view of another embodiment of the screen protector  1  of the present invention. In this embodiment, the present invention provides another manufacturing method of a screen protector as follows: 
     A sheet punching step M 1 : sheets constituting the first outer cover film, the second outer cover film, the grating sheet, and the first attaching member are cut into specific sizes, respectively. 
     An adhesive layer applying step M 2 : a viscous adhesive material is applied to a rear surface of the first outer cover film and a front surface of the second outer cover film, to form a first adhesive layer and a second adhesive layer. 
     A functional layer forming step M 3 : the grating sheet and the attaching member are disposed and attached to the front surface of the second outer cover film to form the functional layer, and the attaching member is disposed adjacent to the grating sheet side-by-side. 
     A semi-finished product forming step M 4 : the rear surface of the first outer cover film is bonded to the grating sheet and the attaching member to form a semi-finished product. 
     A heating and pressing defoaming step M 5 : vacuum-pressing is performed on the semi-finished product under appropriate conditions, to remove bubbles inside the semi-finished product, and the surface of the semi-finished product is flattened to obtain the screen protector. 
     In this embodiment, the screen protector  1  further comprises a transparent first adhesive layer  301  and a second adhesive layer  401  respectively configured to attach the grating sheet  10  and the first attaching member  20  between the first outer cover film  30  and the second outer cover film  40 , so that the screen protector  1  as a whole has a certain structural strength and can be maintained in the flat plane. More importantly, the first outer cover film  30  and the second outer cover film  40  as well as the front and back attachment of the first adhesive layer  301  and the second adhesive layer  401  can further provide sufficient structural strength, so that two independent planar components, i.e., the grating sheet  10  and the first attaching member  20  are not inclined or bent at the junction. To achieve this objective, in some embodiments, the overall thickness of the first outer cover film  30  and the second outer cover film  40  as well as the first adhesive layer  301  and the second adhesive layer  401  at least has to reach ⅛ of the thickness of the grating sheet  10  and the first attaching member  20 . In different embodiments, the overall thickness of the first outer cover film  30  and the second outer cover film  40  as well as the first adhesive layer  301  and the second adhesive layer  401  can be 1/7, ⅙, ⅕, ¼, ⅓, ½ or 1/1 of the thickness of the grating sheet  10  and the first attaching member  20 , the key is that the thinner the overall thickness is, the higher the structural strength of the first outer cover film  30  and the second outer cover film  40  as well as the first adhesive layer  301  and the second adhesive layer  401  is required. Moreover, the first adhesive layer  301  and the second adhesive layer  401  use an optical cured adhesive of higher hardness after curing, which also helps to reduce the individual and overall thicknesses of the first outer cover film  30  and the second outer cover film  40  as well as the first adhesive layer  301  and the second adhesive layer  401 . The outer peripheries of the first adhesive layer  301  and the second adhesive layer  401  correspond to the outer peripheries of the first adhesive layer  301  and the second adhesive layer  401 . The first adhesive layer  301  is located between the outer cover film  30  and the grating sheet  10 /attaching member  20  for adhering the grating sheet  10  and the first attaching member  20  to the outer cover film  30 . The second adhesive layer  401  is located between the grating sheet  10  and the first attaching member  20  and the outer cover film  40  for adhering the grating sheet  10  and the first attaching member  20  to the outer cover film  40 . In some embodiments, the first adhesive layer  301  and the second adhesive layer  401  are realized by an Optical Clear Adhesive (OCA), for example, an optical acrylic adhesive sandwiched between two release films, and can be cut and formed using a punching machine. During processing, a release film is peeled off, and the other release film is peeled off after the first side is attached, to attach the second side. In an embodiment, the thicknesses of the first adhesive layer  301  and the second adhesive layer  401  are in the range of about 0.025, 0.035, 0.05, or 0.075 mm plus or minus 5-20%. In  FIG. 5 , the first adhesive layer  301  and the second adhesive layer  401  are respectively formed with openings  301 H and  401 H, and the sizes, shapes and positions thereof correspond to the openings  34 / 44  of the first outer cover film  30  and the second outer cover film  40  and the opening  24  of the attaching member  20 . Similar to the opening  34 , the opening  24 , and the opening  44 , the openings  301 H and  401 H are also through holes defined by a closed inner edge, respectively. In addition, upon completion of the vacuum-pressing, the overall structural strength of the screen protector can be further enhanced by UV light irradiation. 
     The configuration position/size/shape of the attaching body and the visual sensor (or other functional components) at the periphery of the display screen of the electronic device may be different. Therefore, the structure of the screen protector  1  needs to be slightly adjusted so that the screen protector  1  can correspond to the attaching body adsorbed at the periphery of the display screen, the viewing zone  1 B can correspond to the display screen, and the opening  34 , the opening  24  and the opening  44  of the adsorption zone  1 A can correspond to the visual sensor (or other functional components), and further description is made according to the following embodiments and related drawings. 
       FIG. 6  is an exploded perspective view of another embodiment of the screen protector  1  of the present invention. In  FIG. 6 , the screen protector  1  includes a first attaching member  20 , a grating sheet  10 ′ and a second attaching member  20 ′ sequentially arranged from top to bottom and disposed between the first outer cover film  30  and the second outer cover film  40 . Specifically, the grating sheet  10 ′ is disposed between the first attaching member  20  and the second attaching member  20 ′, and is then coated together between the transparent first adhesive layer  301  and the second adhesive layer  401 . The first outer cover film  30  and the second outer cover film  40  are then attached to the outside of the first adhesive layer  301  and the second adhesive layer  401 . The second attaching member  20 ′ is located below the grating sheet  10 ′. The arrangement is such that the screen protector  1  can also correspond to the attaching body (not shown) disposed inside the electronic device in an attaching mode and located below the display screen. The outer peripheries of the first adhesive layer  301  and the second adhesive layer  401  correspond to the outer periphery of the first adhesive layer  301 /the second adhesive layer  401 . The structures and the relative relationship of the first adhesive layer  301  and the second adhesive layer  401  are as described above, for convenience of explanation, in the following description of the structural relationships of other components, the first adhesive layer  301  and the second adhesive layer  401  are omitted. As shown in  FIG. 6 , the first attaching member  20 , the grating sheet  10 ′ and the second attaching member  20 ′ are disposed vertically adjacent to each other side-by-side; that is, the bottom edge  22  of the first attaching member  20  is aligned with and adjacent to the top edge  11 ′ of the grating sheet  10 ′, and both may be adhesively fixed or merely adjacent to each other; and the top edge  21 ′ of the second attaching member  20 ′ is aligned with and adjacent to the bottom edge  12 ′ of the grating sheet  10 ′, and both may be adhesively fixed or merely adjacent to each other. In  FIG. 6 , the top sections of the two side edges  33 A/ 33 B of the first outer cover film  30 , the two side edges  23 A/ 23 B of the first attaching member  20 , and the top sections of the two side edges  43 A/ 43 B of the second outer cover film  40  are sequentially aligned horizontally, respectively. The main sections of the two side edges  33 A/ 33 B of the first outer cover film  30 , the two side edges  13 A′/ 13 B′ of the grating sheet  10 ′ and the main sections of the two side edges  43 A/ 43 B of the second outer cover film are sequentially aligned horizontally, respectively. Moreover, the lower sections of the two side edges  33 A/ 33 B of the first outer cover film  30 , the two side edges  23 A′/ 23 B′ of the second attaching member  20 ′ and the lower sections of the two side edges  43 A/ 43 B of the second outer cover film  40  are sequentially aligned horizontally, respectively. Similarly, the top edge  31  of the first outer cover film  30 , the top edge  21  of the first attaching member  20 , and the top edge  41  of the second outer cover film  40  are sequentially aligned horizontally, respectively. Similarly, the bottom edge  32  of the first outer cover film  30 , the bottom edge  22 ′ of the second attaching member  20 ′ and the bottom edge  42  of the second outer cover film  40  are sequentially aligned horizontally, respectively. The technical solution of  FIG. 3B  is adjusted and can be applied to the embodiment of  FIG. 6 , that is, for the case where no attaching body is disposed outside the display screen of the electronic device. The screen protector  1  in  FIG. 6  can further include a separate attaching body  3 T in  FIG. 3B  attached to the top side of the display screen of the electronic device and corresponding to the shape and size of the first attaching member  20  in  FIG. 6 , and can further include another attaching body attached to the bottom side of the display screen of the electronic device and corresponding to the shape and size of the second attaching member  20 ′ in  FIG. 6 , so that the attaching bodies can be adsorbed to each other. Similarly, the technical solution of  FIG. 3C  is adjusted and can be applied to the embodiment of  FIG. 6 , that is, for the case where no attaching body is disposed outside the display screen of the electronic device. The screen protector  1  in  FIG. 6  can further include a separate attaching body  3 T′ in  FIG. 3C  correspondingly attached to the first attaching member  20  in  FIG. 6 , and can further include another attaching body corresponding to the shape and size of the second attaching member  20 ′ in  FIG. 6 , so that the attaching bodies can be adsorbed to each other. 
       FIGS. 7A and 7B  are perspective exploded views of another embodiment of the screen protector  1  of the present invention. The elements of  FIGS. 7A and 7B  identical to that of  FIG. 5  are denoted by the same numerical, and the descriptions of them are thus omitted. The difference in  FIGS. 7A and 7B  is that a receiving groove  14  is formed on the grating sheet  10 ″. The receiving groove  14  is located near a top edge  11 ″ of the grating sheet  10 ″. The first attaching member  20  is received in and fitted to the receiving groove  14  in such a manner that a surface of the first attaching member  20  is aligned with a surface of the grating sheet  10 ″. The grating sheet  10 ″ along with the first attaching member  20  are covered by the first adhesive layer  301  and the second adhesive layer  401  on opposite sides. The first outer cover film  30  and the second outer cover film  40  are adhered on the first adhesive layer  301  and the second adhesive layer  401  respectively. In this embodiment, the receiving groove  14  is located near the top edge  11 ″ of the grating sheet  10 ″ and extends along the top edge  11 ″. Two ends of the receiving groove  14  are closed to two side edges  13 A″/ 13 B″ of the grating sheet  10 ″. When the screen protector  1  is placed on an electronic device, the first attaching member  20  corresponds to an optical sensor such as a front lens. Therefore, an opening  24  is formed on the first attaching member  20  for external light to pass therethrough and be received by the optical sensor. 
       FIG. 8  is a perspective exploded view of another embodiment of the screen protector  1  of the present invention. The elements of  FIG. 8  identical to that of  FIGS. 7A and 7B  are denoted by the same numerical, and the descriptions of them are thus omitted. The difference in  FIG. 8  is that a first receiving groove  15  and a second receiving groove  16  is formed on the grating sheet  10 ′″. The first attaching member comprises two half attaching members  20 ′, which are received in and fitted to the first receiving groove  15  and the second receiving groove  16  in such a manner that surfaces of the half attaching members are aligned with a surface of the grating sheet  10 ′″. The grating sheet  10 ′″ along with the first attaching member  20 ′ are covered by the first adhesive layer  301  and the second adhesive layer  401  on opposite sides. The first outer cover film  30  and the second outer cover film  40  are adhered on the first adhesive layer  301  and the second adhesive layer  401  respectively. In this embodiment, an opening  14 ′ is formed on the grating sheet  10 ′″ near the top edge  11 ″ and corresponds to an optical sensor, such as a front lens, for external light to pass therethrough and be received by the optical sensor. The opening  14 ′ is located between the first receiving groove  15  and the second receiving groove  16 , which extend along a top edge  11 ″ of the grating sheet  10 ′″. 
       FIG. 9  is an exploded perspective view of another embodiment of the screen protector  1  of the present invention. The difference in  FIG. 9  is that the first attaching member  20  is a substantially rectangular ring-shaped sheet having a main opening  25  for embedding the grating sheet  10 ″″ so that the outer periphery of the grating sheet  10 ″ includes a top edge  11 ″″, a bottom edge  12 ″″, and two side edges  13 A″″/ 13 B″″ which are aligned with and adjacent to the inner periphery of the main opening  25  of the first attaching member  20  includes four inner edges  251 / 252 / 253 / 254 . In this way, if the periphery of the display screen of the electronic device is provided with the attaching bodies, the screen protector  1  in  FIG. 9  can be correspondingly adsorbed by the rectangular ring-shaped first attaching member  20  thereof, and the rectangular ring-shaped first attaching member  20  matches the grating sheet  10  of corresponding size and shape, and can be implemented in the screen protector  1  of  FIGS. 1, 2A and 3A  instead of corresponding members, which is implemented in common with different technical solutions in the respective figures. The technical solution of  FIG. 3B  is adjusted and can be applied to the embodiment of  FIG. 9 , that is, for the case where no attaching body is disposed outside the display screen of the electronic device. The screen protector  1  in  FIG. 9  can further include a separate attaching body  3 T in  FIG. 3B  that is a rectangular ring-shaped sheet attached outside the display screen of the electronic device and corresponding to the shape and size of the attaching member  20  in  FIG. 9  to be adsorbed to each other. Similarly, the technical solution of  FIG. 3C  is adjusted and can be applied to the embodiment of  FIG. 9 , that is, for the case where no attaching body is disposed outside the display screen of the electronic device. The screen protector  1  in  FIG. 9  can further include one or more separate attaching bodies  3 T′ in  FIG. 3C  attached outside each side of the display screen of the electronic device and correspondingly adsorbed to the attaching member  20  in  FIG. 9 . 
     Referring to  FIGS. 10A and 10B ,  FIG. 10A  is a perspective view of another embodiment of the screen protector  1  of the present invention, and  FIG. 10B  is a partial enlarged view of a region  10 H of  FIG. 10A . The difference between this embodiment and the embodiment of  FIGS. 2A / 2 B is that the opening  34 ′, the opening  24 ′ and the opening  44 ′ are respectively notches that are open on one side and defined by inner edges  341 / 342 / 343 , inner edges  241 / 242 / 243  and inner edge  441 / 442 / 443  of three sides. The opening  34 ′, the opening  24 ′ and the opening  44 ′ correspond to each other in sizes, shapes, and positions, and can be substantially trapezoidal or rectangular. The opening  34 ′, the opening  24 ′ and the opening  44 ′ in  FIGS. 10A and 10B  can be implemented in the screen protector  1  of  FIGS. 1, 2A / 2 B,  3 A, and  6 / 9  instead of corresponding members, which is implemented in common with different technical solutions in the respective figures. When applied to  FIGS. 6 / 9 , the openings  301 H and  401 H (not shown) of the first adhesive layer  301  and the second adhesive layer  401  correspond to the openings  34 ′/ 44 ′ of the first outer cover film  30  and the second outer cover film  40 , and the opening  24 ′ of the attaching member  20  in sizes, shapes and positions. Similar to the opening  34 ′, the opening  24 ′ and the opening  44 ′, in this example, the openings  301 H and  401 H are also rectangular or trapezoidal notches that are open at one side and defined by inner edges of three sides, as shown in  FIG. 10C  (applying the opening  34 ′/ 24 ′/ 44 ′ in  FIG. 10A / 10 B to the embodiment of  FIG. 6 ) and  FIG. 8D  (applying the solution of the opening  34 ′/ 24 ′/ 44 ′ in  FIGS. 10A / 10 B to the embodiment of  FIG. 9 ). The technical solution of  FIG. 3B  is adjusted and can be applied to the embodiments of  FIGS. 10A / 10 B, that is, for the case where no attaching body is disposed outside the display screen of the electronic device. The screen protector  1  in  FIGS. 10A / 10 B can further include a separate attaching body  3 T in  FIG. 3B  that is attached to the top side of the display screen of the electronic device and corresponding to the shape and size of the attaching member  20  in  FIGS. 10A / 10 B (strip-shaped and extending in the long side of the grating sheet  10 , and the opening  3 T 0  is changed into a notch in  FIGS. 10A / 10 B) to be adsorbed to each other. Similarly, the technical solution of  FIG. 3C  is adjusted and can be applied to the embodiment of  FIGS. 10A / 10 B, that is, for the case where no attaching body is disposed outside the display screen of the electronic device. The screen protector  1  in  FIGS. 10A / 10 B can further include one or more separate attaching bodies  3 T′ in  FIG. 3C  attached to the top side of the display screen of the electronic device and correspondingly adsorbed to the attaching member  20  in  FIGS. 10A / 10 B. The technical solution of  FIG. 7A  is adjusted for adapting the embodiment of  FIG. 10A . Referring to  FIG. 10E , a receiving groove  14 ′ is formed on the grating sheet  10 ″ near a top edge  11 ″. The receiving groove  14 ′ has two wide portions having a larger width and a neck portion having a smaller width. The neck portion is located between the wide portions and connects the wide portions. The first attaching member  20 ′ has a shape corresponding to the shape of the receiving groove  14 ′ such that a surface of the first attaching member  20 ′ is aligned with a surface of the grating sheet  10 ″ when the first attaching member  20 ′ is received in and fitted to the receiving groove  14 ′. 
     Referring to  FIGS. 11A and 11B ,  FIG. 11A  is a perspective view of another embodiment of the screen protector  1  of the present invention, and  FIG. 11B  is a partial enlarged view of a region  11 H of  FIG. 11A , and both  FIGS. 11A and 11B  omit the first adhesive layer  301  and the second adhesive layer  401 . The difference between this embodiment and the embodiments of  FIGS. 10A / 10 B is that the original integrated first attaching member  20  is separated by a gap  24 ″ into two half-attaching members  20 L/ 20 R, which are defined between the left half-attaching member  20 L and the right half-attaching member  20 R, so that the half-attaching members  20 L and  20 R are completely disconnected, disposed at the left and right sides and aligned with each other. The vertical depth of the gap  24 ″ is equal to the short side lengths of the half-attaching members  20 L and  20 R, and the long side lengths of the half-attaching members  20 L and  20 R are less than half the long side length of the grating sheet  10 . The first outer cover film  30  and the second outer cover film  40  respectively have openings  34 ″/ 44 ″ which respectively correspond to the gaps  24 ″ in sizes, shapes and positions and can be substantially trapezoidal or rectangular. The openings  34 ″/ 44 ″ are open on one side and are defined by inner edges  347 / 348 / 349  and inner edges  447 / 448 / 449  of three sides, respectively. The gap  24 ″ between the half-attaching member  20 L and the half-attaching member  20 R is defined by the side edge  247  of the half-attaching member  20 L, the side edge  249  of the half-attaching member  20 R, and the middle top edge  118  of the grating sheet  10 . The half-attaching member  20 L and the half-attaching member  20 R are respectively disposed vertically adjacent to the grating sheet side-by-side; that is, the bottom edge  22 L of the half-attaching member  20 L is vertically aligned with and adjacent to the left top edge  11 L of the grating sheet  10 , and both may be adhesively fixed or merely adjacent to each other; and the bottom edge  22 R of the half-attaching member  20 R is aligned with and adjacent to the right top edge  11 R of the grating sheet  10 , and both may be adhesively fixed or merely adjacent to each other. The left top edge  31 L of the first outer cover film  30 , the top edge  21 L of the half-attaching member  20 L, and the left top edge  41 L of the second outer cover film  40  are sequentially aligned horizontally, respectively. Similarly, the right top edge  31 R of the first outer cover film  30 , the top edge  21 R of the half-attaching member  20 R, and the right top edge  41 R of the second outer cover film  40  are sequentially aligned horizontally, respectively. The technical solution of  FIG. 8  is adjusted for adapting the embodiment of  FIG. 11A . Referring to  FIG. 11E , a first receiving groove  15 ′ and a second receiving groove  16 ′ is formed on the grating sheet  10 ″ near the top edge  11 ″. The opening  24 ′ is formed between the first receiving groove  15 ′ and the second receiving groove  16 ′. The shape of the half-attaching member  20 ′ corresponds to the shape of the first receiving groove  15 ′ and the second receiving groove  16 ′ and fitted to the first receiving groove  15 ′ and the second receiving groove  16 ′ respectively such that a surface of the first attaching member is aligned with a surface of the grating sheet  10 ″ when the half-attaching members  20 ′ are received in and fitted to the first receiving groove  15 ′ and the second receiving groove  16 ′ respectively. 
     The technical solutions of the half-attaching member  20 L and the half-attaching member  20 R that are completely disconnected and disposed at the left and right sides, the opening  34 ″ of the first outer cover film  30 /the gap  24 ″/the opening  44 ″ of the second outer cover film  40  in  FIGS. 11A and 11B  can be applied to the screen protector  1  of  FIGS. 1, 2A / 2 B,  3 A, and  5 / 6 / 7 A/ 8 / 9 . When the technical solutions in  FIGS. 11A and 11B  are applied to  FIGS. 1, 2A / 2 B,  3 A, and  5 / 6 / 7 A/ 8 / 9 , the openings  301 H and  401 H (not shown) of the first adhesive layer  301  and the second adhesive layer  401  correspond to the openings  34 ″/ 44 ″ of the first outer cover film  30  and the second outer cover film  40 , and the gap  24 ″ between the half-attaching member  20 L and the half-attaching member  20 R in sizes, shapes and positions. 
     When the technical solutions in  FIGS. 11A and 11B  are applied to  FIGS. 5 / 6 , the openings  301 H and  401 H in  FIGS. 5 / 6  are similar to the openings  34 ″, the openings  24 ″ and the openings  44 ″ in  FIGS. 11A and 11B , that is, the openings  301 H and  401 H in  FIGS. 5 / 6  are also rectangular or trapezoidal notches that are open at one side and defined by inner edges of three sides, respectively, as shown in  FIG. 11C . When the technical solutions in  FIGS. 11A and 11B  are applied to  FIG. 9 , two half-attaching members  20 L/ 20 R are annularly connected along the outer periphery of the grating sheet  10 ″ to form a ring shape, and are formed with a main opening  25  for embedding the grating sheet  10 ″, so that the outer periphery of the grating sheet  10 ″ is adjacent to the inner periphery of the main openings  20  of the two half-attaching members  20 L/ 20 R, as shown in  FIG. 11D . 
       FIG. 12A  is a perspective view showing another embodiment of the screen protector  1  according to the present invention. The main difference between  FIGS. 12A and 11A  is that one or more corners of the bottom edge  12  of the grating sheet  10  of the screen protector  1  in  FIG. 12A  are truncated and retracted into one or two truncated sides  14 / 14 ′ (which are linear and located at opposite sides of the two half-attaching members  20 L/ 20 R in  FIG. 12A ), and the screen protector  1  further includes one or more third attaching members  50 / 50 ′ respectively aligned with the grating sheet  10  and adjacently disposed outside the truncated sides  14 / 14 ′ of the grating sheet  10 . The third attaching member  50  has an inner side  51  (which is linear in  FIG. 12A ), and a bottom side  52  and a vertical side  53  which are respectively connected to two outer ends of the inner side  51  and are substantially perpendicular to each other (so that the third attaching member  50  is substantially triangular). The third attaching member  50 ′ has an inner side  51 ′ (which is linear in  FIG. 12A ), and a bottom side  52 ′ and a vertical side  53 ′ which are respectively connected to two outer ends of the inner side  51 ′ and are substantially perpendicular to each other (so that the third attaching member  50 ′ is substantially triangular). Moreover, the truncated side  14  of the grating sheet  10  is aligned with and adjacent to the inner side  51  of the third attaching members  50 , and both may be adhesively fixed or merely adjacent to each other; and the truncated side  14 ′ of the grating sheet  10  is aligned with and adjacent to the inner side  51 ′ of the third attaching member  50 ′, and both may be adhesively fixed or merely adjacent to each other. The third attaching members  50 / 50 ′ are respectively adhered to two bottom corners between the first outer cover film  30  and the second outer cover film  40  in  FIG. 12A . In  FIG. 12A , the lower sections of two side sides  33 A/ 33 B of the first outer cover film  30 , the vertical sides  53 / 53 ′ of the third attaching members  50 / 50 ′ and the lower sections of two side edges  43 A/ 43 B of the second outer cover film  40  are sequentially aligned horizontally, respectively. Similarly, two outer sections of the bottom edge  32  of the first outer cover film  30 , the bottom side  52 / 52 ′ of the third attaching member  50 / 51 ′ and two outer sections of the bottom edge  42  of the second outer cover film  40  are sequentially aligned horizontally, respectively. 
     Although the two half-attaching members  20 L/ 20 R, the grating sheet  10 , and the third attaching members  50 / 50 ′ are independent members, they are simultaneously adhered between the first outer cover film  30  and the second outer cover film  40  to maintain a certain structural strength, so that the screen protector  1  can maintain a flat surface and would not warp. The effect that the third attaching members  50 / 50 ′ prevent the screen protector  1  from warping is particularly prominent in the implementation of a large-sized screen protector  1  (for example, the diagonal is more than 20 inches). Certainly, if the display screen  4  of the electronic device  2  is provided with an attaching body  3  at the corner of the bottom side, the third attaching members  50 / 50 ′ are the attaching body  3  correspondingly adsorbed at the corner of the bottom side of the display screen  4  of the electronic device  2 . 
     The technical solution that the grating sheet  10  having retracted truncated sides  14 / 14 ′ matches the third attaching members  50 / 50 ′ having vertical sides  53 / 53 ′, bottom sides  52 / 52 ′ and inner sides  51 / 51 ′ in  FIG. 12A  can be implemented in the screen protector  1  in  FIGS. 1, 2A / 2 B,  3 A and  5 / 10 A/ 11 A instead of the corresponding members, which is implemented in common with different technical solutions in the respective figures, as applied to the embodiment of  FIG. 10A , as shown in  FIG. 12B . 
       FIG. 13A  is a perspective view showing another embodiment of the screen protector  1  according to the present invention. The main difference between  FIGS. 13A and 12A  is that the third attaching members  50 / 50 ′ are substantially L-shaped sheets as a whole. Specifically, one or more corners of the bottom edge  12  of the grating sheet  10  of the screen protector  1  in  FIG. 13A  are notched to form one or more pairs of truncated sides  141 / 142  and/or  141  ‘/ 142 ’ which are approximately perpendicular to each other (inverted L-shaped in  FIG. 13A ), and the screen protector  1  further includes one or more third attaching members  50 / 50 ′ respectively aligned with the grating sheet  10  and adjacently disposed outside the pair of truncated sides  141 / 142  and/or  141 ′/ 142 ′ of the grating sheet  10 . The third attaching member  50  has a pair of inner sides  511 / 512  (which are inverted L-shaped in  FIG. 12A ), and the bottom side  52  and the vertical side  53  which are respectively connected to two outer ends of the pair of inner sides  511 / 512  and are substantially perpendicular to each other (so that the third attaching member  50  is substantially rectangular). The third attaching member  50 ′ has a pair of inner sides  511 ′/ 512 ′ (which are inverted L-shaped in  FIG. 12A ), and the bottom side  52 ′ and the vertical side  53 ′ which are respectively connected to two outer ends of the inner sides  511 ′/ 512 ′ and are substantially perpendicular to each other (so that the third attaching member  50 ′ is substantially rectangular). Moreover, the pair of truncated sides  141 / 142  of the grating sheet  10  are respectively aligned with and adjacent to the pair of inner sides  511 / 512  of the third attaching members  50 , and both may be adhesively fixed or merely adjacent to each other; and the truncated side  141 ′/ 142 ′ of the grating sheet  10  are respectively aligned with and adjacent to the pair of inner side  511 ′/ 512 ′ of the third attaching member  50 ′, and both may be adhesively fixed or merely adjacent to each other. 
     The technical solution that the grating sheet  10  having a pair of truncated sides  141 / 142  and  141 ′/ 142 ′ notched at the bottom side matches the third attaching members  50 / 50 ′ having the vertical sides  53 / 53 ′, the bottom sides  52 / 52 ′ and a pair of inner sides  511 / 512  and  511 ′/ 512 ′ in  FIG. 13A  can be implemented in the screen protector  1  in  FIGS. 1, 2A / 2 B,  3 A and  5 / 6 / 8 / 9 / 10 A/ 11 A/ 12 A instead of the corresponding members, which is implemented in common with different technical solutions in the respective figures, as  FIG. 13A  is applied to the embodiment of  FIG. 10A , as shown in  FIG. 13B . Although the third attaching members  50 / 50 ′ of  FIGS. 12A / 13 A are right-triangular or L-shaped, in different embodiments, the third attaching members  50 / 50 ′ can also be rectangles or other polygons having different aspect ratios. 
     Referring to  FIGS. 14A and 14B ,  FIG. 14A  is a perspective view of another embodiment of the screen protector  1  of the present invention, and  FIG. 14B  is a partial enlarged view of a region  14 H of  FIG. 14A . The difference between this embodiment and the embodiments of  FIGS. 10A / 10 B is that the screen protector  1  has a tab  60  which may be in the shape of a rectangle, a trapezoid or a polygon of other types. In  FIGS. 14A and 14B , the tab  60  can be formed by pressing and laminating lugs  35 / 45  which extend from the first outer cover film  30  and the second outer cover film  40  and is located outside the grating sheet  10 . Since the grating sheet  10  does not extend outward, a gap is formed when the lugs  35 / 45  of the first outer cover film  30  and the second outer cover film  40  are laminated to form the tab  60 , and a sealant  601  (for example, the OCA) can be filled.  FIG. 14C  is a partially enlarged perspective view showing another embodiment of the screen protector according to the present invention. In  FIG. 14C , the tab  60  is formed by pressing and laminating the lugs  35 / 45  which extend from the first outer cover film  30  and the second outer cover film  40 , and the lug  15  which extends from the grating sheet  10 . In addition, in different embodiments, the tab  60  can be disposed on either side of the outer side of the grating sheet  10  and can be disposed on either side of the outer side of the attaching member  20  or located at either side of the outer side of a junction of the grating sheet  10  and the attaching member  20 . 
     Referring to  FIGS. 15A / 15 B/ 15 C,  FIG. 15A  is a partially enlarged perspective view of another embodiment of the screen protector  1  of the present invention,  FIG. 15B  is a partially enlarged perspective view of another embodiment of the screen protector  1  of the present invention, and  FIG. 15C  is a partially enlarged perspective view of another embodiment of the screen protector  1  of the present invention.  FIG. 15A  is a stereoscopic structure showing that the screen protector  1  is formed by sequentially laminating the outer cover film  30 , the first adhesive layer  301 , the attaching member  20  and the grating sheet  10  vertically adjacent to each other, the second adhesive layer  401  and the outer cover film  40 , at the junction of the grating sheet  10  and the attaching member  20 , which is similar to the structure disclosed in  FIGS. 5 and 6 .  FIG. 15B  shows that the screen protector  1  further includes a decorative layer  71  located between the rear side of the first adhesive layer  301  and the front side of the attaching member  20 , and is similar in shape and position to the attaching member  20 . The decorative layer  71  can be realized by spraying a pigment or paint or printing a pattern on the front surface of the attaching member  20  or attaching a thin film having a printed pattern to the surface of the attaching member  20  prior to processing. The decorative layer  71  has an outer periphery  710  aligned with the top edges  31 / 41  and the side edges  33 A/ 33 B and  43 A/ 43 B of the first outer cover film  30  and the second outer cover film  40 , and the top edge  21  and the side edge  23 B of the first attaching member  20 . Moreover, the decorative layer  71  has a bottom edge  711  aligned with and adjacent to the front top edge  111  of the grating sheet  10 , and the bottom edge  22  of the attaching member  20  is still aligned with and adjacent to the main top edge  110  of the grating sheet  10 , that is, the bottom edge  711  of the decorative layer  71  and the bottom edge  22  of the attaching member  20  together are aligned with and adjacent to the top edge  11  of the grating sheet  10  (the front top edge  111  and the main top edge  110 ). In this way, the decorative component can also be implemented inside the screen protector  1 , that is, the decorative component is in the same layer as the grating sheet  10 , so that the screen protector  1  can be thinned. 
       FIG. 15C  is different from  FIG. 15B  in that the screen protector  1  further includes another decorative layer  72 , similar to the decorative layer  71 , located between the rear surface of the first attaching member  20  and the front surface of the second adhesive layer  401 . Although the visual elements such as materials, processing methods, patterns, and colors used for decoration may be different, both the decorative layer  71  and the decorative layer  72  are for decorative purposes. The decorative layer  72  has an outer periphery  720  aligned with the top edges  31 / 41  and the side edges  33 A/ 33 B and  43 A/ 43 B of the first outer cover film  30  and the second outer cover film  40 , and the top edge  21  and the side edge  23 B of the first attaching member  20 . Moreover, the decorative layer  72  has a bottom edge  721  aligned with and adjacent to the rear top edge  112  of the grating sheet  10 , and the bottom edge  22  of the first attaching member  20  is still aligned with and adjacent to the main top edge  110  of the grating sheet  10 , that is, the bottom edge  711  of the decorative layer  71 , the bottom edge  22  of the first attaching member  20  and the bottom edge  721  of the decorative layer  72  together are aligned with and adjacent to the top edge  11  of the grating sheet  10  (the front top edge  111 , the main top edge  110  and the rear top edge  112 ). In this way, both sides of the screen protector  1  can be used as front and back sides, which is beneficial to the user&#39;s free application. 
     The decorative layers  71  and/or  72  in  FIGS. 15B / 15 C is disposed on the front surface and/or the rear surface of the attaching member  20 , and this solution can be implemented in the screen protector  1  in  FIGS. 1, 2A / 2 B,  3 A,  5 / 6 / 7 / 8 / 9 ,  10 A/ 10 B,  11 A/ 11 B,  12 A/ 12 B/ 13 A/ 13 B, and  14 A/ 14 B/ 14 C instead of corresponding members, which is implemented in common with different technical solutions in the respective figures. For example, the decorative layers  71  and/or  72  can also be disposed on the front surface and/or the rear surface of the first attaching member, the second attaching member, and/or the third attaching member. In  FIGS. 15B and 15C , the decorative layers  71 / 72  are disposed on the front surface/rear surface of the first absorbing member  20 , and in other embodiments, the decorative layers  71 / 72  can also be respectively disposed on the front surface and/or the rear surface of the first outer cover film  30  and the second outer cover film  40 , and have the sizes, shapes and positions substantially corresponding to the attaching member  20 . 
       FIG. 16A  is a perspective view showing another embodiment of the screen protector  1  according to the present invention. The screen protector  1  in  FIG. 16A  differs from the foregoing figures in that the first attaching member  20  extends along the short side of the grating sheet  10 , and the openings  34 / 301 H/ 24 / 401 H/ 44  are located on the screen protector  1  or the first absorbing member  20  on the short side of the grating sheet  10 , and the electronic device  2  to which it is applied is a tablet computer, and the visual sensor  5  is located on the electronic device  2  and the short side of the display screen  4 . 
     The openings  34 / 301 H/ 24 / 401 H/ 44  in  FIG. 16A  are located on the screen protector  1  or the absorbing member  20  on the short side of the grating sheet  10 , and this solution can be implemented in the screen protector  1  in  FIGS. 1, 2A / 2 B,  3 A/ 3 B/ 3 C,  5 / 6 / 9 ,  10 A/ 10 B  11 A/ 11 B, and  12 A/ 13 / 14 / 15  instead of corresponding members, which is implemented in common with different technical solutions in the respective figures.  FIG. 16B  is a front view showing implementation of the solution of  FIG. 16A  in the embodiment of  FIG. 11C .  FIG. 16C  is a front view showing implementation of the solution of  FIG. 16A  in the embodiment of  FIG. 10C .  FIG. 16D  is a front view showing implementation of the solution of  FIG. 16A  to the embodiment of  FIG. 6 .  FIG. 16E  is a front view showing implementation of the solution of  FIG. 16A  to the embodiment of  FIG. 11D .  FIG. 16F  is a front view showing implementation of the solution of  FIG. 16A  to the embodiment of  FIG. 10D .  FIG. 16G  is a front view showing implementation of the solution of  FIG. 16A  to the embodiment of  FIG. 9 . 
     Next, the bending stiffness test of the screen protector is performed, and the test samples, test methods, and results are as follows: 
     Embodiment 1 
     Sample A is the screen protector of the present invention, and the structure thereof is shown in  FIG. 5 . Sample B is the screen protector having the structure shown in  FIG. 17A / 17 B. Sample C is a commercially available screen protector having no attaching member. Sample A, Sample B, and Sample C all have a dimension of 29.5 cm×20 cm and a thickness of 450 μm, and are formed with openings at an intermediate position near a long side. 
     First, a 100 gram weight is respectively fixed on one side of Sample A, Sample B and Sample C, and is a load-bearing end near the short side; then, the load-bearing ends of Sample A, Sample B, and Sample C extend from the table top by 11 cm, so that the load-bearing end is vacated, the force applied by the weight to the load-bearing end is bent downward, and the other ends of Sample A, Sample B and Sample C are fixed on the table top with a weight of 1000 gram. 
     Then, the vertical distance between the load-bearing ends of Sample A, Sample B and Sample C and the table top is measured with a vernier caliper and recorded in Table 1, and then the horizontal table top is set to 0 degree, and the included angle of the load-bearing end and the horizontal table top is calculated, i.e., the sag of each sample, and the values are shown in Table 1. 
     Next, the sags of Sample A, Sample B, and Sample C are calculated as the bending stiffness (%) by using 0 as 100% and 90 degrees as 0%, and are recorded in Table 1. 
     
       
         
           
               
               
               
               
             
               
                   
                 TABLE 1 
               
               
                   
                   
               
               
                   
                 Sample A 
                 Sample B 
                 Sample C 
               
               
                   
                   
               
             
            
               
                   
               
            
           
           
               
               
               
               
               
            
               
                   
                 Vertical 
                 37.5 
                 58.01 
                 60.02 
               
               
                   
                 distance (mm) 
               
               
                   
                 Sag (degree) 
                 19 
                 31 
                 33 
               
               
                   
                 Bending 
                 79 
                 65.5 
                 63.4 
               
               
                   
                 stiffness (%) 
               
               
                   
                   
               
            
           
         
       
     
     It can be known from the results of Table 1 that the bending stiffness of Sample A is increased by 13.5% relative to Sample B, and is increased by about 15.6% relative to Sample C. Therefore, the screen protector of the present invention has a significantly better bending resistance than the screen protector of the prior art, and is not easily deformed by external force. 
     Embodiment 2 
     In this embodiment, the used sample and the test method are the same as those in Embodiment 1, except that during the test, the load-bearing ends of Sample A, Sample B, and Sample C extend from the table top by 14.9 cm, which is about the midline position of the long side of the sample and also the setting position of the opening. The vertical distance, the sag, and the bending stiffness (%) of the load-bearing end of each sample to the table top are shown in Table 2. 
     
       
         
           
               
               
               
               
             
               
                   
                 TABLE 2 
               
               
                   
                   
               
               
                   
                 Sample A 
                 Sample B 
                 Sample C 
               
               
                   
                   
               
             
            
               
                   
               
            
           
           
               
               
               
               
               
            
               
                   
                 Vertical 
                 67.5 
                 98.1 
                 114 
               
               
                   
                 distance (mm) 
               
               
                   
                 Sag (degree) 
                 24 
                 37 
                 41 
               
               
                   
                 Bending 
                 73 
                 58.9 
                 54.4 
               
               
                   
                 stiffness (%) 
               
               
                   
                   
               
            
           
         
       
     
     It can be known from the comparison of the results of Tables 1 and 2 that the bending stiffness of Sample A, Sample B, and Sample C is reduced compared with that of Sample A, Sample B, and Sample C in Embodiment 1, except that the extension length of the load-bearing end is longer, the midline position of the long side of the sample is also formed with an opening, which also causes the unevenness of the force to reduce the bending stiffness. Moreover, in this embodiment, the bending stiffness of Sample A is increased by 14.1% relative to Sample B, and is increased by 18.6% relative to Sample C, and the increase amplitudes thereof are superior to the results shown in Embodiment 1, it is indicated that even at the position where the opening is formed, the screen protector of the present invention still has a significantly better bending resistance than the screen protector of the prior art, and is not easily deformed by the external force. 
     In summary, the screen protector of the embodiments of the present invention reverses the design direction of the externally added components that have not been solved for decades, and the attaching member is disposed adjacent to the grating sheet side-by-side, and is coated with, at the front and back, the two outer cover films. The functional components and decorative components are successfully integrated into the same layer as the grating sheet, and the screen protector is further thinned while maintaining its original fast adsorption removal function and decorative requirements. Moreover, the screen protector of the embodiments of the present invention can provide sufficient structural strength through two outer cover films and the UV-curing attachment of the first adhesive layer and the second adhesive layer, so that two independent planar components, i.e., the grating sheet and the absorbing member are not inclined or bent at the junction. 
     The description of the disclosed embodiments is provided to enable a person skilled in the art to make or use the present invention. Various modifications to these embodiments are obvious to a person skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein, but is intended to conform to the broadest scope of the principles and novel features disclosed herein. 
     DESCRIPTION OF REFERENCE NUMERALS 
     
         
         
           
               1  Screen protector 
               1 A Adsorption zone 
               1 B Viewing zone 
               10   10 ″  10 ′″  10 ″″ Grating sheet 
               11   11 ″  11 ″  11 ″″ Top edge (of the grating sheet) 
               12   12 ″  12 ′″  12 ″″ Bottom edge (of the grating sheet) 
               13 A,  13 B Side edge (of the grating sheet) 
               14  receiving groove 
               14 ′ through hole 
               15  the first receiving groove 
               16  the second receiving groove 
               20  First attaching element 
               21  Top edge (of the first attaching element) 
               22  Bottom edge (of the first attaching element) 
               23 A,  23 B Side edge (of the first attaching element) 
               24 ,  24 ′,  24 ″ Opening (of the first attaching element) 
               30  First outer cover film 
               31  Top edge (of the first outer cover film) 
               32  Bottom edge (of the first outer cover film) 
               33 A,  33 B Side edge (of the first outer cover film) 
               34 ,  34 ′,  34 ″ Opening (of the first outer cover film) 
               40  Second outer cover film 
               41  Top edge (of the second outer cover film) 
               42  Bottom edge (of the second outer cover film) 
               43 A,  43 B Side edge (of the second outer cover film) 
               44 ,  44 ′,  44 ″ Opening (of the second outer cover film) 
             Electronic device 
               3 ,  3 T,  3 T′ Attaching body 
               4  Display screen 
               5  Visual sensor 
               101 ,  103  Outer layer (of the grating sheet) 
               102  Grating layer 
               1021  Grating wall 
               301  First adhesive layer 
               301 H Opening (of the first adhesive layer) 
               401  Second adhesive layer 
               401 H Opening (of the second adhesive layer) 
               10 ′ Grating sheet 
               11 ′ Top edge (of the grating sheet) 
               12 ′ Bottom edge (of the grating sheet) 
               13 A′,  13 B′ Side edge (of the grating sheet) 
               20 ′ Second attaching element 
               21 ′ Top edge (of the second attaching element) 
               22 ′ Bottom edge (of the second attaching element) 
               23 A′,  23 B′ Side edge (of the second attaching element) 
               25  Main opening (of the first attaching element) 
               251 ,  252 ,  253 ,  254  Inner periphery (of the main opening of the first attaching element) 
               341 ,  342 ,  343  Inner edge (of the opening  34 ′) 
               241 ,  242 ,  243  Inner edge (of the opening  24 ′) 
               441 ,  442 ,  443  Inner edge (of the opening  44 ′) 
               24 ″ Gap 
               20 L,  20 R Half-attaching element 
               247  Side edge (of the half-attaching element  20 L) 
               249  Side edge (of the half-attaching element  20 R) 
               347 ,  348 ,  349  Inner edge (of the opening  34 ″) 
               447 ,  448 ,  449  Inner edge (of the opening  44 ″) 
               118  Middle top edge (of the grating sheet  10 ) 
               11 L Left top edge (of the grating sheet  10 ) 
               11 R Right top edge (of the grating sheet  10 ) 
               22 L Bottom edge (of the half-attaching element  20 L) 
               22 R Bottom edge (of the half-attaching element  20 R) 
               21 L Top edge (of the half-attaching element  20 L) 
               21 R Top edge (of the half-attaching element  20 R) 
               31 L Left top edge (of the first outer cover film  30 ) 
               31 R Right top edge (of the first outer cover film  30 ) 
               41 L Left top edge (of the second outer cover film  40 ) 
               41 R Right top edge (of the second outer cover film  40 )  25  Main opening 
               14 ,  14 ′ Truncated side 
               50 ,  50 ′ Third attaching element 
               51  Inner side (of the third attaching element  50 ) 
               52  Bottom side (of the third attaching element  50 ) 
               53  Vertical side (of the third attaching element  50 ) 
               51 ′ Inner side (of the third attaching element  50 ′) 
               52 ′ Bottom side (of the third attaching element  50 ′) 
               53 ′ Vertical side (of the third attaching element  50 ′) 
               141 ,  142  A pair of truncated sides (of the grating sheet  10 ) 
               141 ′,  142 ′ A pair of truncated sides (of the grating sheet  10 ) 
               511 ,  512  A pair of inner sides (of the third attaching element  50 ) 
               511 ′,  512 ′ A pair of inner sides (of the third attaching element  50 ′) 
               60  Tab 
               35  Lug (formed by extending the first outer cover film  30 ) 
               45  Lug (formed by extending the second outer cover film  40 ) 
               601  Sealant 
               15  Lug (formed by extending the grating sheet  10 ) 
               71 ,  72  Decorative layer 
               711  Bottom edge (of the decorative layer) 
               111  Front top edge (of the grating sheet  10 ) 
               110  Main top edge (of the grating sheet  10 ) 
               112  Rear top edge (of the grating sheet  10 ) 
               720  Outer periphery (of the decorative layer  72 ) 
               721  Bottom edge (of the decorative layer  72 )