CN101768413B - Adhesive tape and display device using same - Google Patents

Abstract

The invention relates to an adhesive tape and a display device using the adhesive tape. The adhesive tape includes a first sub-adhesive tape with a first base material layer, a first adhesive layer and a second adhesive layer on both sides thereof; a second sub-adhesive tape with The second base material layer is provided with a third adhesive layer and a fourth adhesive layer on both sides, wherein the third adhesive layer is connected to the second adhesive layer; and a fiber layer has an implanted part and an attached part, wherein the The implanted part is embedded in the second adhesive layer, and the attachment part is attached to the surface of the second adhesive layer along the first direction, or the implanted part is embedded in the inner part of the three adhesive layers, and the attachment part Applied on the surface of the third adhesive layer along the first direction, so that the resistance produced when the first sub-adhesive is torn relative to the second sub-adhesive along the first direction is smaller than that of the first sub-adhesive when the first sub-adhesive is different from the first direction Relative to the resistance produced when the second sub-adhesive tape is torn.

Description

Adhesive tape and display device using same

technical field

The invention relates to an adhesive tape and a display device using the same, in particular to a light-shielding tape and a display device using the light-shielding tape.

Background technique

During the assembly process of the liquid crystal display device, a double-sided light-shielding adhesive tape is required to fix the display liquid crystal panel into the casing. As shown in FIG. 1A , FIG. 1 is an assembly method of a conventional liquid crystal display device 10 , wherein an adhesive tape 12 is located between the casing 13 and the liquid crystal panel 11 to fix the liquid crystal panel 11 to the casing 13 . This tape usually has a strong adhesive to ensure the effectiveness of the fixation.

However, after the liquid crystal display devices are assembled, some liquid crystal display devices will be returned to the factory for rework due to various defects. During heavy work, the liquid crystal panel needs to be separated from the casing. For some small-sized liquid crystal panels, because the glass thickness is relatively thin, it is easy to produce fragments when removing the layer of tape. As shown in Figure 1B, the liquid crystal panel 11 The edge portion of the liquid crystal display is broken due to the adhesive force of the adhesive tape 12, so that the entire display is scrapped, increasing the bad cost of the liquid crystal display device.

Contents of the invention

In view of this, the present invention will provide a kind of adhesive tape that can be easily disassembled during heavy work and a display device using the adhesive tape. The adhesive tape has two layers of sub-adhesives that can be torn each other, and a layer of Directional fibers such that the two-ply tape has less resistance to tearing in one direction and greater resistance to tearing in the other direction.

The adhesive tape provided according to the object of the present invention comprises: a first sub-adhesive tape having a first base material layer with a first adhesive layer and a second adhesive layer on both sides; a second sub-adhesive tape having a second base material layer, A third adhesive layer and a fourth adhesive layer are provided on both sides thereof, wherein the third adhesive layer is connected to the second adhesive layer; and a fiber layer has an implanted part and an attachment part, wherein the implanted part is embedded in the Inside the second adhesive layer, the attachment part is attached to the surface of the second adhesive layer along the first direction, or the implanted part is embedded in the inner part of the three adhesive layers, and the attachment part is attached along the first direction On the surface of the third adhesive layer, the resistance produced when the first sub-adhesive is torn in the first direction relative to the second sub-adhesive is smaller than the difference between the first sub-adhesive and the first sub-adhesive relative to the second sub-adhesive Resistance to tearing.

According to the adhesive tape provided according to the purpose of the present invention, wherein: the fiber layer is formed on the side of the second adhesive layer adjacent to the third adhesive layer or the third adhesive layer is adjacent to the second adhesive layer by using a frictional alignment method. layer side.

According to the adhesive tape provided according to the object of the present invention, the thickness of the first sub-adhesive tape is smaller than that of the second sub-adhesive tape.

According to the adhesive tape provided according to the object of the present invention, wherein: the first base material layer is a light-shielding layer, and the side adjacent to the first adhesive layer is provided with a black polymer material.

According to the adhesive tape provided according to the object of the present invention, wherein: the second substrate layer is a reflective layer, and its side adjacent to the fourth adhesive layer is provided with a high-reflectivity material, and the reflectivity of the high-reflectivity material is 90%. -95%.

The adhesive tape provided according to the object of the present invention, wherein: also includes a first release layer, located on the outside of the first adhesive layer; and a second release layer, located on the outside of the fourth adhesive layer, wherein the first release layer Layer and the second release layer are peeled off before the adhesive tape is used.

According to another object of the present invention, a display device is provided, comprising: a display panel having a display area and a non-display area located at the periphery of the display area; a casing having a fixing area for placing the display panel; and at least one adhesive tape as described above , connecting the display panel and the bottom frame, wherein the plurality of adhesive tapes are located on the non-display area of the display panel, the first adhesive layer of which is bonded to the display panel, and the fourth adhesive layer is bonded to the fixed area of the housing.

Therefore, the adhesive tape provided by the present invention and the display device using the adhesive tape can not only ensure the adhesion strength of the assembly, but also avoid worrying that the adhesive tape will be too sticky to damage the panel during disassembly.

The present invention will be described in detail below with reference to the accompanying drawings.

Description of drawings

FIG. 1A is a schematic structural diagram of a conventional display device;

FIG. 1B is a schematic diagram of fragments generated when the existing display device is disassembled;

Shown in Fig. 2 is the structural diagram of adhesive tape of the present invention;

Figure 3A is a top view schematic view of the fiber layer of the adhesive tape of the present invention;

Fig. 3 B shows the fiber layer sectional view of adhesive tape of the present invention;

4A-4B are tearing effect diagrams of the adhesive tape of the present invention;

5A-5B are schematic diagrams of the display device of the present invention.

Detailed ways

Please refer to Fig. 2, which is a structural diagram of the adhesive tape of the present invention. As shown in the figure, the adhesive tape 100 is composed of two layers of sub-adhesive tapes, wherein the first sub-adhesive tape 110 has a first adhesive layer 103, a second adhesive layer 104 and a first substrate layer 101, the first adhesive layer 103 and The second adhesive layer 104 is respectively arranged on both sides of the first base material layer 101; The fourth adhesive layer 106 is respectively disposed on two sides of the second substrate layer 102 , wherein the third adhesive layer 105 is connected to the second adhesive layer 104 . On the outside of the first adhesive layer 103 and the fourth adhesive layer 106 are respectively provided with a first release layer 107 and a second release layer 108, the first release layer 107 and the second release layer 108 can be The adhesive tape 100 is peeled off before use.

Between the first sub-adhesive tape 110 and the second sub-adhesive tape 120, there is also a layer of fiber layer 200, specifically, the fiber layer 200 is arranged on the side of the second adhesive layer 104 adjacent to the third adhesive layer 105, or It is arranged on the side of the third adhesive layer 105 adjacent to the second adhesive layer 104 .

Please refer to FIG. 3A and FIG. 3B together. FIG. 3A is a schematic diagram of the fiber layer of the adhesive tape of the present invention, and FIG. 3B is a cross-sectional view of the fiber layer of the adhesive tape of the present invention. As shown, the fibrous layer 200 is disposed on the third adhesive layer 105 , which has a layer of hairy fibrous substance 201 with an implanted portion 202 and an attached portion 203 . The layer of fibrous material 201 utilizes a rubbing alignment method (using a brush or a rotating roller to rub in a predetermined direction), so that the attachment parts 203 are arranged in an orderly manner along the first direction (the direction of the arrow in the figure). In this way, the implanted portion 202 is embedded in the third adhesive layer 105 , and the attachment portion 203 is attached to the surface of the third adhesive layer 105 along the first direction. In this way, when the side with the fiber layer 200 acts on other viscous substances, it is torn along the first direction, and the attachment portion 203 is not easily pulled up. Since the fibrous layer 200 itself is non-adhesive, it is arranged on the third adhesive layer 105 to reduce the adhesiveness on the surface of the third adhesive layer 105, and when it is torn against the first direction or along other directions, the attachment portion 203 will be It is pulled up to generate an additional pulling resistance, thus making the sticking effect of the third adhesive layer 105 more obvious. It should be understood that when the fiber layer 200 is not limited to be disposed on the third adhesive layer 105 , but is disposed on the second adhesive layer 104 , it has the same effect.

Please refer to Figures 4A-4B, Figure 4A is an effect diagram when the first sub-adhesive tape and the second sub-adhesive tape are torn along the first direction, and Figure 4B is a tearing of the first sub-adhesive tape and the second sub-adhesive tape against the first direction The rendering of the two sub-tapes. As shown in the figure, when the first sub-adhesive tape 110 is torn off along the first direction (as shown by the arrow in the figure), the fiber layer 200 is basically unchanged, and its attachment portion 203 is still attached to the second sub-adhesive tape 120. surface, but when the first sub-adhesive tape 110 is torn off against the first direction, due to the adhesive force of the first sub-adhesive tape 110 itself, the attachment part 203 is pulled, so that the first sub-adhesive tape 110 and the second sub-adhesive tape 110 A pulling resistance is generated between the adhesive tapes 120 , so that the first sub-adhesive tape 110 is not easily torn off.

Please refer to FIG. 5A and FIG. 5B in conjunction with FIG. 2 . FIG. 5A is a schematic diagram of the display device of the present invention, and FIG. 5B is a schematic diagram of the display device of the present invention when it is disassembled. As shown in the figure, the display device 300 has a display panel 310 , a casing 320 and an adhesive tape 100 connecting the display panel 310 and the casing 320 . The display panel 310 has a display area 312 and a non-display area 311 around the display area 312 , and a first polarizing film 313 and a second polarizing film 314 are disposed in the display area 312 . The casing 320 has a fixing portion 321 for fixing the display panel 310 . The adhesive tape 100 is disposed in the non-display area 311 of the display panel 310 . In this embodiment, the first sub-adhesive tape 110 of the adhesive tape 100 is pasted on the display panel 310 through the first adhesive layer 103, and its first base material layer 101 is a light-shielding layer, adjacent to the first base material layer 101. One side of the first adhesive layer 103 is provided with a black polymer material, so it can play a light-shielding function. The second sub-adhesive tape 120 of the adhesive tape 100 is pasted on the housing 320 through the fourth adhesive layer 106, and its second base material layer 102 is a reflective layer. One side is provided with a high-reflectivity material, and the reflectivity of the high-reflectivity material is preferably between 90% and 95%, so that it can well reflect light from such as a backlight device.

When the display device 300 needs to be disassembled, it only needs to be torn along the direction of the fiber layer of the adhesive tape, because the resistance generated between the first sub-adhesive tape 110 and the second sub-adhesive tape 120 at this time is far less than what the panel can handle. The withstand strength is such that when the first sub-adhesive tape 110 and the second sub-adhesive tape 120 are detached, the display panel can be easily detached from the housing without causing damage to the panel. Moreover, the thickness of the first sub-adhesive tape 110 is between 0.01mm and 0.1mm, which is much smaller than the thickness of the second sub-adhesive tape 120. Even if the first sub-adhesive tape 110 is not removed during rework, it will not affect the thickness of the display device. Bring too much impact, greatly increase the yield of heavy industry.

From the above detailed description of the preferred embodiments, it is hoped that the features and spirit of the present invention can be described more clearly, and the scope of the claims of the present invention is not limited by the preferred embodiments disclosed above. On the contrary, the intention is to cover various modifications and equivalent arrangements within the scope of the appended claims of the present invention.

Claims (8)

1. An adhesive tape, characterized in that comprising: The first sub-adhesive tape has a first substrate layer, and a first adhesive layer and a second adhesive layer are provided on both sides thereof; The second sub-adhesive tape has a second substrate layer with a third adhesive layer and a fourth adhesive layer on both sides, wherein the third adhesive layer is connected to the second adhesive layer; and The fiber layer has an implanted portion and an attachment portion, wherein the implanted portion is embedded in the second adhesive layer, the attachment portion is attached to the surface of the second adhesive layer along the first direction, or the implanted portion embedded in the third adhesive layer, the attachment part is attached to the surface of the third adhesive layer along the first direction; The fiber layer is formed on a side of the second glue layer adjacent to the third glue layer or a side of the third glue layer adjacent to the second glue layer. 2. The adhesive tape according to claim 1, wherein the fiber layer is oriented by a frictional alignment method. 3. The adhesive tape of claim 1, wherein the thickness of the first sub-adhesive is smaller than that of the second sub-adhesive. 4. The adhesive tape according to claim 3, wherein the thickness of the first sub-adhesive tape is between 0.01 mm and 0.1 mm. 5 . The adhesive tape according to claim 1 , wherein the first base material layer is a light-shielding layer, and a black polymer material is provided on a side adjacent to the first adhesive layer. 6 . 6. The adhesive tape as claimed in claim 1, characterized in that: the second substrate layer is a reflective layer, and its side adjacent to the fourth adhesive layer is provided with a high reflectivity material, and the reflection of the high reflectivity material The rate is 90%-95%. 7. The adhesive tape as claimed in claim 1, characterized in that: it also comprises a first release layer, located on the outside of the first adhesive layer; and a second release layer, located on the outside of the fourth adhesive layer, wherein the The first release layer and the second release layer are peeled off before the adhesive tape is used. 8. A display device, characterized in that it comprises: a display panel having a display area and a non-display area located on the periphery of the display area; a housing with a fixed area for placing the display panel; And the adhesive tape according to any one of claims 1 to 7, connecting the display panel and the casing, wherein the adhesive tape is located in the non-display area of the display panel, the first adhesive layer bonds the display panel, the The fourth adhesive layer bonds the fixed area of the housing.

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