An easily removable liquid crystal display protective screen

Abstract

The present invention relates to an easily detachable liquid crystal display protection screen, and belongs to the technical field of display protection devices. The easily detachable liquid crystal display protection screen of the present invention comprises a double-sided adhesive frame with a hard film layer in the middle, a protection panel and a clip, the clip comprises a rear baffle and a front baffle, the lower part of the rear baffle is an extended insertion part, and a U-shaped notch is formed between the front baffle and the rear baffle; the extended insertion part is inserted into the gap, the lower edge of the protection panel is set in the U-shaped notch, and the lower edge of the protection panel is clamped by the front baffle and the rear baffle; the front surface of the double-sided adhesive frame is bonded to the protection panel, and the rear surface of the double-sided adhesive frame is directly bonded to the screen of the liquid crystal display. The liquid crystal display protection screen of the present invention directly fixes the transparent protection screen to the liquid crystal screen of the liquid crystal display through the clip and the double-sided adhesive. When disassembly is required, the protection screen can be conveniently removed by a glue removal knife or a glue pulling device without damaging the screen of the liquid crystal display protection screen.

Description

Technical Field

[0001] The present invention relates to the technical field of display protection devices, and more particularly to an easily detachable liquid crystal display protection screen. Background Art

[0002] Liquid crystal display (LCD) screens are very fragile and can easily break under strong external impacts. This is especially true in public places like internet cafes, where LCD screens are subject to significant damage. To address this issue, transparent panels are being installed on LCD screens to protect them.

[0003] Chinese invention patent CN201435183Y discloses a display protection screen, in which a transparent panel is mounted on the display frame using positioning members (nuts), assembly members (nuts) and adhesive members. Since it requires holes to be punched at the four corners of the transparent panel and fixed to the display, and the current LCD display frame is not suitable for screw fixation, the application scope of this patented technology is significantly limited.

[0004] Chinese invention patent CN201203726Y discloses a display protection screen, which includes a transparent panel 10, a light shielding frame 20 and an adhesive layer 30. Figure 2 The assembly process is shown. One side of the adhesive layer 30 is adhered to the shading frame 20, and the shading frame is placed on the outer edge of the transparent panel 10. The other side of the adhesive layer 30 is adhered to the four sides of the display screen. The display protective screen is easy to install, impact-resistant and breathable. Since the product came out, it has won the trust of many consumers.

[0005] However, with the rapid development of display technology, narrow-border LCD monitors are becoming the mainstream product in the market. Due to the narrow outer borders of mainstream LCD monitors, protective screens cannot be attached to the outer frame of the monitor, but need to be attached to the LCD screen of the monitor. However, LCD screens are very fragile. Once the protective screen is attached to the LCD screen, it is easy to damage the LCD screen when removing it. However, when the monitor is repaired, the protective screen needs to be removed. Or when the protective screen is damaged and needs to be replaced with a new one, the old protective screen also needs to be removed. However, since the protective screen is attached to the LCD screen with double-sided tape, the traditional method is to use a utility knife to cut the double-sided tape and remove the protective screen, but this method can easily damage the LCD screen. Summary of the Invention

[0006] In order to solve the above technical problems existing in the prior art, the purpose of the present invention is to provide an easily detachable liquid crystal display protective screen.

[0007] The easily detachable LCD protection screen of the present invention is used for screen protection of an LCD, and the lower end frame of the LCD has a gap, and is characterized in that: the display protection screen includes a double-sided adhesive frame with a hard film layer in the middle, a protective panel and a clip, and the clip includes a rear baffle and a front baffle located on both sides of the rear baffle, and an extended insertion portion is provided below the rear baffle, and a U-shaped notch is formed between the front baffle and the rear baffle; the extended insertion portion is inserted into the gap, and the lower edge of the protective panel is arranged in the U-shaped notch, and the lower edge of the protective panel is clamped by the front baffle and the rear baffle; the front surface of the double-sided adhesive frame is bonded to the protective panel, and the rear surface of the double-sided adhesive frame is directly bonded to the screen of the LCD.

[0008] Wherein, the double-sided adhesive frame with a hard film layer is a composite film layer having an outer double-sided adhesive layer, a hard film layer and an inner double-sided adhesive layer.

[0009] Wherein, the hard coat layer is a metal sheet, a ceramic sheet, a polyolefin sheet or a polyester sheet.

[0010] Among them, the bonding force between the outer double-sided adhesive layer and the hard coat layer is greater than the bonding force between the outer double-sided adhesive layer and the protective panel; the bonding force between the inner double-sided adhesive layer and the hard coat layer is greater than the bonding force between the inner double-sided adhesive layer and the LCD protective screen.

[0011] The clip is integrally formed from sheet metal, and the thickness of the sheet metal is less than 5 mm, preferably less than 3 mm, and more preferably less than 1 mm.

[0012] The projections of the front baffle and the rear baffle in the clip in the horizontal direction do not overlap.

[0013] Wherein, the liquid crystal display is a curved liquid crystal display, and the protective panel is a curved protective panel.

[0014] Wherein, at least the upper frame, the left frame and the right frame of the double-sided adhesive frame have adhesive.

[0015] Wherein, glue pulling devices are provided on the left and right frames of the double-sided adhesive frame.

[0016] Among them, the glue pulling device includes a main body bonded to the inner double-sided adhesive layer, two side holding feet are provided on both sides of the upper end of the main body, and a middle holding foot is provided in the middle of the lower end of the main body, the two side holding feet and the middle holding foot wrap and bond the outer double-sided adhesive layer; the middle holding foot is provided with an opening.

[0017] Wherein, the glue pulling device is integrally formed from sheet metal.

[0018] Compared with the prior art, the easily detachable LCD protective screen of the present invention has the following beneficial effects:

[0019] The easily detachable LCD protective screen of the present invention directly fixes the transparent protective screen to the LCD screen of the LCD through clips and double-sided tape, which is dust-proof and anti-fouling and has high bonding strength. When disassembly is required, the protective screen can be conveniently removed by a special glue removal knife or glue pulling device without damaging the LCD screen. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A three-dimensional view of a liquid crystal display protection screen according to an embodiment of the present invention.

[0021] Figure 2 The figure is a cross-sectional view of a liquid crystal display protection screen according to an embodiment of the present invention.

[0022] Figure 3 for Figure 1 The assembly diagram of the LCD protective screen is shown.

[0023] Figure 4 The figure is a schematic diagram of the clip structure in a liquid crystal display protection screen of the present invention.

[0024] Figure 5 A three-dimensional view of a glue removal knife used for the LCD protection screen of the present invention.

[0025] Figure 6 Application view of using adhesive remover knife to remove LCD protective screen.

[0026] Figure 7 This is a top view of the bent adhesive pulling device in the LCD protective screen (with double-sided adhesive frame).

[0027] Figure 8 This is a top view of a bent adhesive pulling device (without the double-sided adhesive frame).

[0028] Figure 9 This is a top view of another adhesive pulling device after bending (without double-sided adhesive frame).

[0029] Figure 10 Schematic diagram of the position of the glue pulling device on the double-sided adhesive frame.

[0030] Figure 11 A three-dimensional view of a liquid crystal display protection screen according to an embodiment of the present invention.

[0031] Figure 12 for Figure 11 The assembly diagram of the LCD protective screen is shown. DETAILED DESCRIPTION

[0032] The easily detachable liquid crystal display protective screen of the present invention will be further described below in conjunction with specific embodiments to help those skilled in the art have a more complete, accurate and in-depth understanding of the technical solution of the present invention.

[0033] Example 1

[0034] like Figure 1-4 As shown, the easily removable LCD protection screen of this embodiment is used to protect the screen of the LCD 10. The frame 12 at the lower end of the LCD 10 has a gap 11 extending along the length of the display. The display protection screen includes a double-sided adhesive frame 30 with a hard coat layer 31 in the middle, a protective panel 20 and a clip 50. The double-sided adhesive frame has an outer double-sided adhesive layer 32, a hard coat layer 31 and an inner double-sided adhesive layer 33. The hard coat layer 31 can be selected from metal sheets, ceramic sheets or polyolefins, polyester sheets, etc. The function of adding the hard coat layer is to relieve the stress caused by the glue removal knife when working, and protect the LCD screen from stress damage during the glue removal operation. The hard film layer 31 can be made of metal sheets such as steel sheets, aluminum foil, copper foil, etc., or ceramic sheets such as aluminum oxide, silicon oxide, etc., or various synthetic resin sheets such as PET, PE, PVC, PP, PO, ABS, EVA, acrylic resin and other sheets. In this embodiment, the material is not specifically limited, as long as it can provide a method to slow down or eliminate the stress on the screen surface of the liquid crystal display during the debonding operation. In addition, in the double-sided adhesive frame of this embodiment, the bonding force between the outer double-sided adhesive layer and the hard film layer should generally be greater than the bonding force between the outer double-sided adhesive layer and the protective panel; the bonding force between the inner double-sided adhesive layer and the hard film layer is generally greater than the bonding force between the inner double-sided adhesive layer and the liquid crystal display protective screen, so that the double-sided adhesive frame 30 can exist as a whole when disassembled. The protective panel 20 can usually be a glass panel (such as a tempered glass panel) or a resin panel, etc. In addition, by plating a functional coating on the surface of the glass panel or the resin panel, additional protection functions such as anti-radiation and anti-blue light can be provided. As Figure 4As shown, in this embodiment, the clip 50 includes a rear baffle 52 and front baffles 51 located on either side of the rear baffle. Below the rear baffle 52 is an extended insertion portion 53, and a U-shaped notch 55 is formed between the front baffle 51 and the rear baffle 52. The extended insertion portion 53 is inserted into the gap 11, while the lower edge of the protective panel 20 is positioned within the U-shaped notch 55. The front baffle 51 and rear baffle 52 secure the lower edge of the protective panel 20. The front surface of the double-sided adhesive frame 30 is bonded to the protective panel 20, while the rear surface of the double-sided adhesive frame 30 is directly bonded to the screen of the LCD display 10. The clip can be integrally formed from sheet metal, and the thickness of the sheet metal is less than 5 mm, preferably less than 3 mm, and more preferably less than 1 mm. The horizontal projections of the front baffle 51 and rear baffle 52 in the clip do not overlap. The width of the U-shaped notch 55 should match the thickness of the protective panel. The width of the notch is slightly greater than the thickness of the transparent panel of the protective screen, but the difference between the two should not exceed 2 mm. The actual depth of the U-shaped notch 55 may not exceed 10 mm. After assembly, the U-shaped notch 55 can provide support for the transparent panel, thereby reducing the downward shear force exerted by the transparent panel on the upper plastic frame due to the gravity effect, thereby improving the overall durability of the display protective screen. However, the main feature of the LCD protective screen of this embodiment is that when the protective screen needs to be replaced or the display needs to be repaired, the protective screen can be easily removed without damaging the fragile LCD screen.

[0035] The crystal display protection screen of this embodiment can be Figure 5 Use the special glue removal knife shown in the figure to remove it. Figure 5 As shown, the glue removal knife 40 includes a knife body 42, a knife handle 41 is provided at the upper end of the knife body 42, and a blade 43 is provided at the lower end of the knife body 42. Positioning feet 44 are formed at both ends of the bottom of the knife handle 41, and a U-shaped notch 45 is formed between the positioning foot 44 and the knife body 42. A blocking foot 46 is further formed at the bottom end of the positioning foot 44 to prevent misoperation. The width of this U-shaped notch matches the thickness of the transparent panel of the protective screen. The difference between the width of the U-shaped opening and the thickness of the transparent panel of the protective screen is less than 2 mm. One end of the positioning foot is bent to form a blocking foot of about 2 mm long. The function of the blocking foot is to prevent incorrect operation. When using, the user may use the positioning foot as a knife edge. With this blocking foot, the user can easily distinguish which is the knife edge.

[0036] When it is necessary to disassemble, use the degumming knife of the present invention to cut off the double-sided tape between the hard film layer and the edge of the transparent panel along the edge of the transparent panel. During the degumming process, this U-shaped notch will catch the edge of the transparent panel of the protective screen, and play the role of positioning the blade, ensuring that the blade will only contact the double-sided tape and will not contact the LCD screen. The hard film layer is between the degumming knife and the LCD screen. It separates the degumming knife from the LCD screen and relieves the pressure caused by the blade. In addition, there is also a layer of double-sided tape between the hard film layer and the LCD screen, which can also relieve the pressure of the blade. Using the degumming knife and the double-sided tape with a hard film layer, the double-sided tape between the transparent panel of the protective screen and the LCD screen can be safely and quickly removed.

[0037] Example 2

[0038] Compared with the embodiment 1, the easily detachable LCD protective screen of this embodiment does not need to use a glue removal knife. Instead, a glue pulling device is provided on the double-sided adhesive frame 30. Figure 7-9 The glue pulling device shown includes a main body 61, and two side holding feet 62 are provided on both sides of the upper end of the main body 61, and a middle holding foot 63 is provided in the middle of the lower end of the main body 61. The two side holding feet 62 and the middle holding foot 63 wrap and bond the double-sided adhesive layer 30, and the middle holding foot 63 is also provided with an opening for stirring the glue pulling device. Figure 10 The position of the adhesive pulling device in the double-sided adhesive layer 30 is shown. The adhesive pulling device of this embodiment can also be made of a metal sheet. The position of the adhesive pulling device wrapped with the double-sided adhesive is sandwiched between the protective screen transparent panel and the computer LCD screen.

[0039] The method of removing the protective screen using the adhesive pull device is as follows:

[0040] When you need to remove the protective screen, first use a needle-like object to pick out the middle foot with an opening on the adhesive pulling device. Then pull the picked middle foot, and the adhesive pulling device will pull one end of the double-sided tape out from between the edge of the protective screen and the LCD screen of the display. Pull this end of the double-sided tape and continue to pull, and the double-sided tape will detach from the edge of the protective screen and also from the LCD screen. Because there is a thin film layer sandwiched between the double-sided tape. The thin film layer strengthens the strength and toughness of the double-sided tape. The double-sided tape will not break during the pulling process. The double-sided tape can be easily removed. After the double-sided tape is removed, the protective screen and the LCD screen of the display are separated, making it convenient to remove the protective screen.

[0041] Example 3

[0042] This embodiment relates to a protective screen for a curved liquid crystal display. Its design concept is basically the same as that of embodiment 1 and embodiment 2. However, the screen of the liquid crystal display is curved, such as Figure 11-12As shown, the corresponding protective panel 70 also has a curved structure. The upper, left, and right edges of the protective panel 70 may be printed with a black ink layer, while the lower edge may be transparent. The double-sided adhesive frame 80 may have an adhesive layer only on the two main surfaces of the upper, left, and right frames (of course, an adhesive layer may also be provided on both surfaces of the lower frame), and the lower edge of the protective panel 70 is fixed to the clips via two or more clips 50 (two in the figure).

[0043] like Figure 12 As shown, during assembly, first insert the extended insertion portion of the clip 50 into the gap in the frame 12 at the lower end of the LCD display 10. Then, place the lower edge of the protective panel into the U-shaped notch of the clip. The clip 50 is fixed in the gap, and the lower edge of the protective screen is fixed in the U-shaped notch of the clip. The clip allows the lower edge of the protective panel to be attached to the LCD screen. The adhesive strips on the left and right edges of the protective screen are then removed and bonded to the LCD screen. This secures all four edges of the protective screen, and the four edges of the transparent panel can be well attached to the LCD screen. Because the protective screen of this embodiment also utilizes a double-sided adhesive frame 80 with a hard coat layer and the clip 50 fixing structure, the protective screen of this curved LCD display can also be easily removed using the special adhesive removal knife described in the embodiment. Alternatively, as shown in Example 2, adhesive pulling devices can be provided on the left and right sides of the double-sided adhesive frame 80 to facilitate removal of the protective screen. For detailed disassembly procedures, please refer to the descriptions of Examples 1 and 2.

[0044] For ordinary technicians in this field, the specific embodiments are only illustrative descriptions of the present invention. It is obvious that the specific implementation of the present invention is not limited to the above-mentioned methods. As long as various non-substantial improvements are made using the technical solution of the present invention, they are all within the scope of protection of the present invention.

Claims

1. An easily detachable liquid crystal display protection screen, used for protecting the screen of a liquid crystal display, wherein the lower frame of the liquid crystal display has a gap, and is characterized in that: The display protection screen comprises a double-sided adhesive frame with a hard film layer in the middle, a protection panel and a clip, wherein the clip comprises a rear baffle and front baffles located on both sides of the rear baffle, an extended insertion portion is provided below the rear baffle, and a U-shaped notch is formed between the front baffle and the rear baffle; the extended insertion portion is inserted into the gap, and the lower edge of the protection panel is arranged in the U-shaped notch, and the lower edge of the protection panel is clamped by the front baffle and the rear baffle; and the front surface of the double-sided adhesive frame is bonded to the protection panel, The rear surface of the double-sided adhesive frame is directly bonded to the screen of the liquid crystal display; the hard film layer is a metal sheet, a ceramic sheet or a hard resin sheet; a glue pulling device is arranged on the left and right frames of the double-sided adhesive frame; the glue pulling device includes a main body bonded to the inner double-sided adhesive layer, two side holding feet are arranged on both sides of the upper end of the main body, and a middle holding foot is arranged in the middle of the lower end of the main body, the two side holding feet and the middle holding foot wrap and bond the outer double-sided adhesive layer, and the middle holding foot is provided with an opening.

2. The easily detachable liquid crystal display protection screen according to claim 1, characterized in that: The double-sided adhesive frame with a hard film layer is a composite film layer having an outer double-sided adhesive layer, a hard film layer and an inner double-sided adhesive layer.

3. The easily detachable liquid crystal display protection screen according to claim 1, characterized in that: The bonding force between the outer double-sided adhesive layer and the hard coat layer is greater than the bonding force between the outer double-sided adhesive layer and the protective panel; the bonding force between the inner double-sided adhesive layer and the hard coat layer is greater than the bonding force between the inner double-sided adhesive layer and the LCD protective screen.

4. The easily detachable liquid crystal display protection screen according to claim 1, characterized in that: The clip is integrally formed from sheet metal.

5. The easily detachable liquid crystal display protection screen according to claim 1, characterized in that: The projections of the front baffle and the rear baffle in the clip in the horizontal direction do not overlap.

6. The easily detachable liquid crystal display protection screen according to claim 1, characterized in that: The liquid crystal display is a curved liquid crystal display, and the protection panel is a curved protection panel.

7. The easily detachable liquid crystal display protection screen according to claim 6, characterized in that: At least the upper frame, the left frame and the right frame of the double-sided adhesive frame have adhesive.

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