TWI399296B - Optical film set and manufacturing method thereof - Google Patents

Description

Optical film set and manufacturing method thereof

The present invention relates to an optical film set, and more particularly to an optical film set for a flat display device and a method of manufacturing the same.

In order to improve the visual quality of the flat display device, a common optical film has a polarizing film, a diffusion film, a brightness enhancement film, etc. by stacking a plurality of optical elements in a planar display device. Therefore, the surface smoothness and integrity of the optical film itself directly affect the display effect of the flat display device, and how to ensure that the optical film is not scratched, rubbed, or assembled before being assembled on the flat display device. In the conventional technique, the optical film that has not been installed in the flat display device is protected by the method shown in Figs. 1A and 1B.

Referring to FIG. 1A and FIG. 1B simultaneously, FIG. 1A is a schematic top view of a conventional optical film set; and FIG. 1B is a schematic structural view of the optical film set. The optical film set 1 comprises at least one optical film 11 and at least one protective film 12, wherein the protective film 12 covers a surface of the optical film 11 and is uniform between the protective film 12 and the optical film 11. A layer of adhesive 13 is applied to enable the optical film 11 and the protective film 12 to be closely adhered to prevent the optical film from being adhered or scraped by dust during assembly in a flat display device (not shown) or during transportation. The loss causes poor light transmittance, and at the same time, the optical film 11 is prevented from absorbing moisture and affecting reliability.

However, it is worth noting that when the optical film 11 is assembled to the flat display device, since the optical film 11 and its corresponding protective film 12 are adhered to each other by the completely applied adhesive 13, In addition to the strong adhesion, the contact area of the optical film 11 and the protective film 12 is also relatively large, so that in the process of tearing off the protective film 12, a large amount of charged particles are often left in the release of static electricity. On the surface of the optical film 11, the surface characteristics of the optical film 11 are changed to lower the display effect of the flat display device, and moreover, the charged particles remaining on the surface of the optical film 11 are assembled on the optical film 11 in a plane. After the display device, the thin circuit inside the flat display device is further affected, which causes electrical problems in the flat display device.

Although the above-mentioned conventional techniques can be used to reduce the static electricity accumulation in the optical by using an antistatic adhesive such as an adhesive of various interface type, polymer type or conductive type, or a method of blowing an ion wind. The problem of the surface of the diaphragm, however, the above-mentioned means also have antistatic properties that are not durable, are susceptible to moisture, incompatible with the solvent, the proportion of the additive is not good, the viscosity is poor, and the optical transmittance of the optical film group is changed. Poor and antistatic agent pollution... and other derivative issues.

Therefore, how to improve the problem of static accumulation between the optical film and the protective film in the optical film group without affecting the surface characteristics of the optical film (for example, light transmittance), and avoiding scratching and rubbing of the optical film. It has become one of the important topics to prevent pollution and to absorb the moisture absorption of the optical film and affect the reliability.

In view of the above problems, an object of the present invention is to provide an optical film set and a method of manufacturing the same, which can prevent the optical film from being scratched, scratched, rubbed, contaminated, and reduced in optical efficiency by reducing the amount of the adhesive used. Accumulation of static electricity on the surface of the diaphragm to enhance the effect of the optical film.

To achieve the above object, an optical film set according to the present invention comprises an optical film, a protective film and an adhesive layer. The protective film is disposed on a surface of the optical film; the adhesive layer is disposed between the protective film and the surface of the optical film, and the area of the adhesive layer is smaller than the area of the surface of the optical film, and the area of the adhesive layer is greater than zero.

Another optical film set according to the present invention comprises an optical film, a protective film and an adhesive layer. The protective film is disposed on a surface of the optical film; and the adhesive layer is discontinuously disposed between the protective film and the surface of the optical film, and the adhesive layer is formed by mutually parallel twill.

Still another optical film set according to the present invention comprises an optical film, a protective film and an adhesive layer. The protective film is disposed on a surface of the optical film; and the adhesive layer has a plurality of patterns, and the pattern is dispersedly disposed between the protective film and the surface of the optical film.

In order to achieve the above object, a method of fabricating an optical film set according to the present invention comprises the steps of: providing an optical film; providing a protective film along a surface of the optical film; and forming an adhesive layer on the protective film and Between the surfaces of the optical film, the protective film is adhered to the optical film, and the area of the adhesive layer formed is smaller than the area of the surface, and the area of the adhesive layer is greater than zero.

Moreover, a method of fabricating an optical film set according to the present invention comprises the steps of: providing an optical film; providing a protective film along a surface of the optical film; and discontinuously forming an adhesive layer on the protective film and Between the surfaces of the optical film, the protective film is adhered to the optical film.

According to the present invention, an optical film set and a method of manufacturing the same according to the present invention, by reducing the contact area between the optical film and the protective film, the protective film is prevented from generating a large amount of static electricity and accumulating during the tearing process. On the surface of the optical film, the electronic component adjacent to the optical film does not suffer from electrical failure due to the influence of charged particles. Moreover, by reducing the amount of the adhesive, the adhesive remaining on the surface of the optical film is greatly reduced to maintain the light transmittance of the optical film. Compared with the prior art, the optical film set of the present invention and the manufacturing method thereof can effectively enhance the effect of the optical film without affecting the light transmittance of the optical film set, and can also reduce the optical film set. Cost of production.

DETAILED DESCRIPTION OF THE INVENTION Hereinafter, an optical film set and a method of manufacturing the same according to a preferred embodiment of the present invention will be described with reference to the accompanying drawings, wherein the same elements will be described with the same reference numerals.

2A and FIG. 2B, FIG. 2A is a schematic top view of an optical film set according to a preferred embodiment of the present invention; and FIG. 2B is a schematic structural view of the optical film set. The optical film set 2a includes an optical film 21, a protective film 22, and an adhesive layer 23a. The protective film 22 is disposed on a surface 211 of the optical film 21; the adhesive layer 23a is disposed between the protective film 22 and the surface 211 of the optical film 21, and the area of the adhesive layer 23a is smaller than the area of the surface 211 of the optical film 21. And the area of the adhesive layer is greater than zero.

The optical film 21 may be a common optical film such as a polarizing film, a diffusion film, a brightness enhancement film, etc.; the protective film 22 is a high molecular polymer selected from the group consisting of nylon, polystyrene, and polymethacrylate. A group consisting of polycarbonate, polyethylene, polypropylene, polyvinyl chloride, polyethylene terephthalate, and combinations thereof. It should be noted that the coverage area of the preferred adhesive layer 23a needs to be equal to or less than 50% of the area of the surface 211, and the method of forming the adhesive layer 23a is selected from the group consisting of roll coating, brush coating, and spraying ( Spray coating), dipping or a combination of the above.

The adhesive layer 23a in this embodiment is evenly distributed between the surface 211 of the optical film 21 and the protective film 22, so that the surface 211 of the optical film 21 is protected by the protective film 22 to prevent the optical film 21 from being scratched, rubbed or contaminated. The adhesive layer 23a is further coated on the edge of the optical film group 2a, as shown in FIG. 2A, so that the isolation effect of the optical film 21 from the outside can be further enhanced to prevent the optical film 21 from absorbing moisture in the environment. Moisture, to ensure the reliability of the optical film set 2a.

In addition, the optical film set 2a further includes a release film 24 corresponding to the protective film 22 and disposed on the other surface 212 of the optical film 21, as shown in FIG. 2B. Similarly, the release film 24 can be protected. The optical film 21 is protected from scratching, rubbing or contamination.

For example, when the optical film 21 in the optical film group 2a is an upper polarizer in a flat display device, as shown in FIG. 2C, the flat display device 3 includes a lower polarizing unit 32a and a lower glass substrate (such as a film). The transistor substrate 34, the liquid crystal layer 36, an upper glass substrate (such as a color filter substrate) 38, and an optical film 21 (i.e., the upper polarizing unit 32b). The lower glass substrate 34 and the upper glass substrate 38 are sequentially disposed above the lower polarizing unit 32a, and the optical film 21 (ie, the upper polarizing unit 32b) is disposed on the other surface of the upper glass substrate 38. Of course, the optical film group 2a described above can also be applied to the lower polarizing unit 32a in the flat display device 3, or in the above-described flat display device 3. The lower polarizing unit 32a and the upper polarizing unit 32b can be applied to the present invention. The exposed optical film set 2a.

It is to be noted that the area of the adhesive layer 23a is smaller than 50% of the area of the surface 211, and when the upper polarizing unit 32b (optical film 21) is assembled on the surface of the liquid crystal element, the upper polarizing unit 32b (optical film 21) is The contact area of the corresponding protective film is greatly reduced, and the contact area with the upper polarizing unit 32b (optical film 21) is reduced during the process of tearing off the protective film 22, so that the relatively generated charged particles are also greatly reduced. Only a slight electrostatic effect occurs, so that the liquid crystal element close to the upper polarizing unit 32b (optical diaphragm 21) is only affected by a small amount of static electricity, and does not have a serious negative influence on the electrical performance of the flat display device. At the same time, the upper polarizing unit 32b (optical film 21) is protected by the protective film 22 before being assembled in the flat display device, so that the upper polarizing unit 32b (optical film 21) can maintain good surface characteristics.

Please refer to FIG. 3. FIG. 3 is a top plan view of another optical film set according to a preferred embodiment of the present invention. The optical film set 2b comprises an optical film, a protective film 22 and an adhesive layer 23b. The protective film 22 is disposed on one surface of the optical film; and the adhesive layer 23b is discontinuously disposed between the protective film 22 and the surface of the optical film, and as shown in FIG. 3, the adhesive layer 23b is made of mutually parallel twill Composition. The connection relationship between the optical film and the protective film 22 has been described in detail in the above embodiments, and thus will not be described herein.

It is to be noted that the adhesive layer 23b shown in FIG. 3 is different from the above-mentioned adhesive layer 23a (as shown in FIG. 2A) in that the adhesive layer 23b is disposed in a discontinuous manner between the protective film 22 and the surface of the optical film. And the area of the adhesive layer 23b is less than or equal to 50% of the surface area. Thus, the amount of the adhesive layer 23b can be greatly simplified, and the direction in which the adhesive layer 23b is applied is uniform, and the user can follow a direction in the direction of the application of the adhesive layer 23b or against the adhesive layer 23b. The coating direction may be) to peel off the protective film 22 from the surface of the optical film.

Please refer to FIG. 4. FIG. 4 is a top plan view of another optical film set according to a preferred embodiment of the present invention. The optical film set 2c includes an optical film, a protective film 22, and an adhesive layer 23c. The protective film 22 is disposed on a surface of the optical film; and the adhesive layer 23c has a plurality of patterns P, and the pattern P is dispersedly disposed between the protective film 22 and the surface of the optical film, wherein the pattern P is a rod A combination of a pattern, a dot pattern, a water droplet pattern, or any regular or irregular pattern, and the present embodiment is exemplified by a rod pattern as an example, and is not intended to limit the scope of the invention. The connection relationship between the optical film and the protective film 22 has been described in detail in the above embodiments, and thus will not be described herein.

It should be noted that the adhesive layer 23c shown in FIG. 4 is different from the adhesive layer 23a (shown in FIG. 2A) and the adhesive layer 23b (shown in FIG. 3) in that the adhesive layer 23c has a plurality of patterns P, and The pattern P is dispersedly disposed between the protective film 22 and the surface of the optical film, and the area of the adhesive layer 23c is less than or equal to 50% of the surface area. In the embodiment, the pattern P is exemplified by a pattern having two directions, and the multi-directional pattern can be exemplified as an actual requirement, so that the direction of tearing off the protective film 22 can be more diversified.

Referring to FIG. 5, a method for manufacturing an optical film set according to a preferred embodiment of the present invention includes steps S1 to S3a, and simultaneously refers to the optical film group 2a shown in FIG. 2A and FIG. 2B. To further explain the method of manufacturing the optical film group 2a.

First, step S1 is to provide an optical film 21; step S2 is to provide a protective film 22 along a surface 211 of the optical film 21 so that the surface 211 of the optical film 21 is not scratched, rubbed or contaminated; In step S3a, an adhesive layer 23a is formed between the protective film 22 and the surface 211 of the optical film 21, so that the protective film 22 is adhered to the optical film 21, and the area of the adhesive layer 23a is smaller than the area of the surface 211.

Wherein, in step S3a, the area of the adhesive layer 23a is less than or equal to 50% of the area of the surface 211, and the method of forming the adhesive layer is selected from the group consisting of roll coating, brush coating, spray coating, dip coating or a combination of the above methods.

In addition, the manufacturing method of the optical film set 2a may further include a step S4 of providing a release film 24 along the other surface 212 of the optical film 21, which is disposed on the other surface 212 of the optical film 21. As shown in FIG. 2B, the optical film 21 is prevented from being scratched, rubbed or contaminated.

Please refer to FIG. 6. FIG. 6 shows a method for fabricating another optical film set according to a preferred embodiment of the present invention, which includes steps S1 to S3b; and also refers to the structure shown in FIG. 3 to further illustrate the optical film. A method of manufacturing the sheet group 2b. Steps S1 and S2 are described in detail in the above embodiments, and thus are not described herein.

It should be noted that step S3b is different from step S3a (shown in FIG. 5) in that step S3b is to form an adhesive layer 23b between the protective film 22 and the surface 211 of the optical film 21, so that the protective film 22 is formed. Adhered to the optical film 21, the adhesive layer 23a has at least two portions, and these portions are discontinuous.

Wherein, in step S3b, the area of the adhesive layer 23b is less than or equal to 50% of the area of the surface 211, and the method of forming the adhesive layer is selected from the group consisting of roll coating, brush coating, spray coating, dip coating or a combination of the above methods.

Of course, the manufacturing method of the optical film group 2b may further include a step S4 (not shown) along the other surface 212 of the optical film 21 to provide a release film 24, as shown in FIG. 2B. In order to avoid scratching, rubbing or contamination of the optical film 21.

In addition, the manufacturing method of the optical film group 2c shown in FIG. 4 is similar to the steps shown in FIG. 5 and FIG. 6, and will not be described again.

According to the present invention, an optical film set and a method of manufacturing the same according to the present invention, by reducing the contact area between the optical film and the protective film, the protective film is prevented from generating a large amount of static electricity and accumulating during the tearing process. On the surface of the optical film, the electronic component adjacent to the optical film does not suffer from electrical failure due to the influence of charged particles. Moreover, by reducing the amount of the adhesive, the adhesive remaining on the surface of the optical film is greatly reduced to maintain the light transmittance of the optical film. Compared with the prior art, the optical film set of the present invention and the manufacturing method thereof can effectively enhance the effect of the optical film without affecting the light transmittance of the optical film set, and can also reduce the optical film set. Cost of production.

The above is intended to be illustrative only and not limiting. Any equivalent modifications or alterations to the spirit and scope of the invention are intended to be included in the scope of the appended claims.

1, 2a, 2b, 2c. . . Optical film set

11, 21. . . Optical diaphragm

12, 22. . . Protective film

13. . . Adhesive

211, 212. . . surface

23a, 23b, 23c. . . Adhesive layer

twenty four. . . Release film

3. . . Flat display device

32a. . . Lower polarizing unit

32b. . . Upper polarizing unit

34. . . Lower glass substrate

36. . . Liquid crystal layer

38. . . Upper glass substrate

P. . . pattern

S1, S2, S3a, S3b, S4. . . Production process

1A is a schematic view showing a schematic view of a conventional optical film set;

1B is a schematic view showing the structure of a conventional optical film set;

2A is a schematic view showing a top view of an optical film set according to a preferred embodiment of the present invention;

2B is a schematic view showing the structure of an optical film set according to a preferred embodiment of the present invention;

2C is a schematic view showing the structure of a flat display device according to a preferred embodiment of the present invention;

3 is a schematic view showing a top view of another optical film set according to a preferred embodiment of the present invention;

4 is a schematic view showing a top view of another optical film set according to a preferred embodiment of the present invention;

Figure 5 is a flow chart showing a method of manufacturing the optical film set shown in Figures 2A and 2B;

Figure 6 is a flow chart showing a method of manufacturing the optical film set shown in Figure 3.

2a. . . Optical film set

twenty two. . . Protective film

23a. . . Adhesive

Claims (39)

An optical film set comprising: an optical film; a protective film disposed on a surface of the optical film; and an adhesive layer disposed between the protective film and the surface of the optical film, the adhesive The area of the layer is less than the area of the surface of the optical film, and the area of the adhesive layer is greater than zero. The optical film set of claim 1, wherein the adhesive layer has an area less than or equal to 50% of the surface area. The optical film set according to claim 1, further comprising: a release film disposed on the other surface of the optical film. The optical film set according to claim 1, wherein the protective film is a high molecular polymer. The optical film set according to claim 4, wherein the high molecular polymer is selected from the group consisting of nylon, polystyrene, polymethacrylate, polycarbonate, polyethylene, polypropylene, polyvinyl chloride, and poly A group consisting of ethylene terephthalate and combinations thereof. The optical film set of claim 1, wherein the method of forming the adhesive layer is selected from the group consisting of roll coating, brush coating, spray coating, dip coating, or a combination of the above. The optical film set according to claim 1, wherein the optical film is a polarizing film, a diffusion film or a brightness enhancement film. An optical film set comprising: an optical film; a protective film disposed on a surface of the optical film; and an adhesive layer discontinuously disposed between the protective film and the surface of the optical film And the adhesive layer is composed of mutually parallel twill. The optical film set of claim 8, wherein the adhesive layer has an area less than or equal to 50% of the surface area. The optical film set of claim 8 further comprising: a release film disposed on the other surface of the optical film. The optical film set of claim 8, wherein the protective film is a high molecular polymer. The optical film set according to claim 11, wherein the high molecular polymer is selected from the group consisting of nylon, polystyrene, polymethacrylate, polycarbonate, polyethylene, polypropylene, polyvinyl chloride, and poly A group consisting of ethylene terephthalate and combinations thereof. The optical film set of claim 8, wherein the method of forming the adhesive layer is selected from the group consisting of roll coating, brush coating, spray coating, dip coating, or a combination of the above. The optical film set of claim 8, wherein the optical film is a polarizing film, a diffusion film or a brightness enhancement film. An optical film set comprising: an optical film; a protective film disposed on a surface of the optical film; and an adhesive layer having a plurality of patterns, wherein the patterns are dispersedly disposed on the protective film and the optical Between the surfaces of the diaphragm. The optical film set of claim 15 wherein the area of the adhesive layer is less than or equal to 50% of the surface area. The optical film set of claim 15 further comprising: a release film disposed on the other surface of the optical film. The optical film set according to claim 15, wherein the protective film is a high molecular polymer. The optical film set according to claim 18, wherein the high molecular polymer is selected from the group consisting of nylon, polystyrene, polymethacrylate, polycarbonate, polyethylene, polypropylene, polyvinyl chloride, and poly A group consisting of ethylene terephthalate and combinations thereof. The optical film set of claim 15, wherein the method of forming the adhesive layer is selected from the group consisting of roll coating, brush coating, spray coating, dip coating, or a combination of the above. The optical film set according to claim 15, wherein the optical film is a polarizing film, a diffusion film or a brightness enhancement film. A method of fabricating an optical film set, comprising the steps of: providing an optical film; providing a protective film along a surface of the optical film; and forming an adhesive layer on the protective film and the optical film Between the surfaces, the protective film is adhered to the optical film, and the area of the adhesive layer is smaller than the area of the surface. The manufacturing method of claim 22, wherein the area of the adhesive layer is less than or equal to 50% of the surface area. The manufacturing method of claim 22, further comprising the step of providing a release film along the other surface of the optical film. The method of manufacturing according to claim 22, wherein the method of forming the adhesive layer is selected from the group consisting of roll coating, brush coating, spray coating, dip coating, or a combination of the above. A method of manufacturing an optical film set, comprising the steps of: providing an optical film; providing a protective film along a surface of the optical film; and discontinuously forming an adhesive layer on the protective film and the optical film Between the surfaces of the sheet, the protective film is adhered to the optical film. A method of fabricating an optical film set, comprising the steps of: providing an optical film; providing a protective film along a surface of the optical film; and forming an adhesive layer on the protective film and the optical film Between the surfaces, the protective film is adhered to the optical film, the adhesive layer has at least two portions, and the portions are discontinuous. The manufacturing method of claim 27, wherein the area of the adhesive layer is less than or equal to 50% of the surface area. The method of manufacture of claim 27, further comprising the step of providing a release film along the other surface of the optical film. The manufacturing method according to claim 27, wherein the method of forming the adhesive layer is selected from the group consisting of roll coating, brush coating, spray coating, dip coating, or a combination of the above methods. A flat display device comprising: a lower polarizing unit; a lower glass substrate disposed adjacent to the lower polarizing unit; an upper glass substrate disposed corresponding to the lower glass substrate; and a liquid crystal layer interposed Between the lower glass substrate and the upper glass substrate; and an upper polarizing unit disposed adjacent to the upper glass substrate: wherein at least one of the lower polarizing unit and the upper polarizing unit is an optical film And the optical film sheet comprises an optical film, a protective film and an adhesive layer, wherein the protective film is disposed on a surface of the optical film, and the adhesive layer is disposed on the protective film and the protective film Between the surfaces of the optical film, the area of the adhesive layer is smaller than the area of the surface of the optical film, and the area of the adhesive layer is greater than zero. The flat display device of claim 31, wherein the area of the adhesive layer is less than or equal to 50% of the surface area. The flat display device of claim 31, wherein the optical film set further comprises: a release film disposed on the other surface of the optical film. A flat display device comprising: a lower polarizing unit; a lower glass substrate disposed adjacent to the lower polarizing unit; an upper glass substrate disposed corresponding to the lower glass substrate; and a liquid crystal layer interposed Between the lower glass substrate and the upper glass substrate; and an upper polarizing unit disposed adjacent to the upper glass substrate: wherein at least one of the lower polarizing unit and the upper polarizing unit is an optical film The optical film assembly comprises an optical film, a protective film and an adhesive layer, and the protective film is disposed on a surface of the optical film, and the adhesive layer is discontinuously disposed on the protection layer. The film is interposed between the surface of the optical film and the adhesive layer is formed by mutually parallel twill. The flat display device of claim 34, wherein the area of the adhesive layer is less than or equal to 50% of the surface area. The flat display device of claim 34, wherein the optical film set further comprises: a release film disposed on the other surface of the optical film. A flat display device comprising: a lower polarizing unit; a lower glass substrate disposed adjacent to the lower polarizing unit; an upper glass substrate disposed corresponding to the lower glass substrate; and a liquid crystal layer interposed Between the lower glass substrate and the upper glass substrate; and an upper polarizing unit disposed adjacent to the upper glass substrate: wherein at least one of the lower polarizing unit and the upper polarizing unit is an optical film The optical film assembly comprises an optical film, a protective film and an adhesive layer, the protective film is disposed on a surface of the optical film, the adhesive layer has a plurality of patterns, and the plurality of patterns A pattern is disposed between the protective film and the surface of the optical film. The flat display device of claim 37, wherein the area of the adhesive layer is less than or equal to 50% of the surface area. The flat display device of claim 37, wherein the optical film set further comprises: a release film disposed on the other surface of the optical film.