TWI571676B - Optical film on the panel of the bonding device - Google Patents

Description

Optical film to panel bonding device

The present invention relates to a bonding apparatus, and more particularly to an optical film-to-panel bonding apparatus capable of bonding an optical film to a panel surface.

The polarizing plate is an important component in the liquid crystal display, and can convert the unpolarized light emitted by the light source of the liquid crystal display into linearly polarized light having a certain direction, so that the liquid crystal crystal packet can be effectively utilized to control the switching of the light. Referring to Fig. 1, a known polarizing plate 90 includes an optical film 901 having a light polarizing effect, and a release film 902 bonded to a surface of one side of the optical film 901. The polarizing plate 90 can be placed in a roll after the manufacturing is completed, and the optical film 901 can be attached to the surface of a liquid crystal panel 903 by an RTP (roll to panel) process. The RTP process is performed in conjunction with a bonding device 9 including a first roller 91 for winding the polarizing plate 90, a cutter 92 for cutting the polarizing plate 90, and a plurality of a panel transport module 93 for transporting the wheel 931 of the liquid crystal panel 903, two upper and lower opposing stitching wheels 94, a second roller 95 for winding the release film 902, and a triangular stripping member 96, and the stripping member 96 has an stripping end 961 at an acute angle.

When the bonding device 9 is used, the first roller 91 continuously winds the polarizing plate 90, and the cutter 92 cuts the polarizing plate 90, and cuts the optical film 901 without cutting the release film 902, and The size of the cut optical film 901 is made to conform to the size of the liquid crystal panel 903. Next, the release film 902 is forced to be bent by the peeling end 961 at an acute angle, so that the cut optical film 901 can be peeled off from the release film 902, which is a kind of cutting the entire roll of polarizing plate 90. The half-break type is used to cut the rolled material into pieces. After the dicing, the optical film 901 and the liquid crystal panel 903 are transported together between the bonding wheels 94. After the optical film 901 and the liquid crystal panel 903 are rolled by the bonding wheels 94, the optical film The 901 is attached and fixed to the liquid crystal panel 903.

However, it has been found in practice that since the bonding device 9 peels the optical film 901 by merely forcing the release film 902 to be bent by the peeling end 961, no component that can help the optical film 901 peel the release film 902 is provided. Therefore, there is a problem that the optical film 901 is not easily peeled off, thereby affecting the smoothness of the bonding process. Moreover, the flatness of the optical film 901 attached to the liquid crystal panel 903 affects the polarizing effect and the quality of the display screen. If the bonding is uneven, the quality of the display is lowered and the yield is lowered, but just from the release film. The edge of the 902 peeled optical film 901 is highly susceptible to warping deformation due to stress, and further affects the flatness when it is bonded to the liquid crystal panel 903. Therefore, how to improve the smoothness of the bonding process and improve the fit and flatness is an important issue.

Accordingly, it is an object of the present invention to provide an optical film-to-panel bonding apparatus capable of improving the smoothness of the bonding process and the flatness of the bonding.

Therefore, the optical film-to-panel bonding device of the present invention is suitable for bonding the optical film of an optical plate to the panel, the optical plate further comprising a release film on the surface of the optical film, the optical film pair The panel fitting device includes a supply module for transporting the optical plate along a predetermined path, a cutter, an electrostatic module, and a bonding module. The tool is located on the predetermined path and is used to cut the optical film of the optical plate into a predetermined size. The electrostatic module includes a conveyor belt on one side of the cutter for conveying the cut optical film, and an electrostatic generator on one side of the conveyor belt for providing static electricity to the conveyor belt. The bonding module is located on one side of the electrostatic module, and is used for attaching the optical film sent by the electrostatic module to the panel.

The utility model has the advantages that the static electricity of the conveyor belt is provided by the electrostatic generator, and the adsorption force of the conveyor belt on the optical film is increased by the static electricity to help the optical film peel off from the release film, so that the bonding process is smooth. get on. Moreover, because the electrostatic attraction enables the optical film to be flatly conveyed on the conveyor belt, the optical film can be flattened after entering the bonding module, so that the optical film can be flattened and attached to the panel, thereby improving the process. Rate and product quality.

Referring to FIG. 2, an embodiment of the optical film-to-panel bonding apparatus of the present invention is suitable for attaching the optical film 11 of an optical plate 1 to the panel 10. The optical plate 1 further includes a film located on the optical film. 11 surface release film 12. In this embodiment, the optical plate 1 is a polarizing plate and can be arranged in a roll, wherein the optical film 11 has a light polarization effect and includes a two-spaced TAC film layer and a PVA film between the TAC film layers. The layer, a surface protective layer on the surface of one of the TAC film layers, and an adhesive layer on the surface of the other TAC film layer, the release film 12 is on the surface of the adhesive layer. The panel 10 is, for example, a liquid crystal display panel. The present invention is not limited to the above examples, and other functions of the optical film may be carried out by using the apparatus of the present invention if it is required to be attached to a sheet. The optical film-to-panel bonding device of the embodiment comprises a feeding module 2, a cutter 3, an electrostatic module 4, a bonding module 5, and a panel conveying module 6.

The feeding module 2 includes a first roller 21, a second roller 22, and a steering roller 23 spaced apart and located on a predetermined path. The first roller 21 is used for winding the optical plate 1 and is used for winding the optical plate 1 to transport the optical plate 1 in an unwinding direction 70. The second roller 22 is located on the side of the first roller 21 and is used for winding the release film 12. The steering roller 23 is for guiding the release film 12 to be conveyed toward the second roller 22 in a winding direction 71. That is to say, the feeding module 2 mainly drives the optical plate 1 to sequentially move along a predetermined path of the winding direction 70 and the winding direction 71.

The cutter 3 is located on the side of the first roller 21 on the predetermined path transmitted by the optical plate 1. The cutter 3 faces the optical film 11 of the optical plate 1, and can be driven to move to cut the optical film 11. In practice, the number of cutters 3 may also be two or more, and are spaced apart from each other in the winding direction 70.

The electrostatic module 4 includes a conveyor belt 41 on one side of the cutter 3 adjacent to the steering roller 23, and an electrostatic generator 42 and an electrostatic remover 43 on opposite sides of the conveyor belt 41. The conveyor belt 41 extends in the unwinding direction 70 and is used to convey the cut optical film 11 in the unwinding direction 70. The material of the conveyor belt 41 may be rubber, metal, or a mixture of rubber and metal. The rubber and the metal are mixed, for example, a rubber material and a metal wire is embedded therein to increase the electrostatic strength. The conveyor belt 41 includes a first side 411 facing the first roller 21 and a second side 412 opposite the first side 411 and facing the bonding module 5. The static electricity generator 42 of the present embodiment is adjacent to the first side 411 and is used to provide static electricity to the conveyor belt 41. Specifically, the static electricity generator 42 is a voltage capable of outputting a high voltage to cause the conveyor belt 41 to generate high-voltage static electricity. Supply. The static remover 43 is adjacent to the second side 412 of the conveyor belt 41 and is used to remove static electricity on the conveyor belt 41. The static remover 43 is, for example, a blower capable of blowing ion wind to the conveyor belt 41, or a grounding member capable of grounding the conveyor belt 41. The ion wind has ions that can be used to neutralize electrostatic charges to remove static electricity. It should be particularly noted here that the static electricity is gradually disappeared. Therefore, the static electricity remover 43 may not be provided in actual use.

The bonding module 5 is located on the side of the electrostatic module 4 and is used to adhere the optical film 11 conveyed by the electrostatic module 4 to the panel 10 . The bonding module 5 of the present embodiment includes two matching rollers 51 that are vertically spaced apart, a plurality of runners 52 located downstream of the bonding rollers 51, and a static remover 53. The conforming rollers 51 are adjacent to the second side 412 of the conveyor belt 41 and are located downstream of the panel transport module 6.

The panel transport module 6 is configured to transport the panel 10 in a bonding direction 72, and includes a plurality of driving rollers 61 spaced along the bonding direction 72, and a panel positioning seat 62 for adjusting the position of the panel 10. . By the rotation of the driving rollers 61, the panel 10 placed above it can be moved in the bonding direction 72. It should be noted that the bonding direction 72 of the embodiment is different from the winding direction 71, and is different from the winding direction 70, and the bonding direction 72 is opposite to the winding direction 71, and the bonding direction is opposite. 72 is to the left, the winding direction 71 is to the right, and the winding direction 70 is toward the upper left, but the implementation is not limited thereto. The edge of the panel positioning seat 62 can be abutted against one side edge of the panel 10, so that the edge of the panel 10 is aligned with the panel positioning seat 62 to prevent the panel 10 from being skewed due to the conveying process.

In the case of the present invention, first, the first roller 21 winds up the optical plate 1 to transport the optical plate 1 in the winding direction 70. The cutter 3 is cut at an appropriate position of the optical film 11 to cut the optical film 11 into a predetermined size conforming to the size of the panel 10. It should be noted that, in actual implementation, the optical film 11 can be cut out of a plurality of smaller optical films 11 , and the panel transport module 6 can continuously transport a plurality of the panels 10 along the bonding direction 72 . Each of the cut optical films 11 is attached to each of the panels 10, respectively. Further, only the optical film 11 is cut at the time of cutting, and the release film 12 is not cut. Since the cutting is a known technique and is not an improvement of the present invention, it will not be described.

Then, the cut optical film 11 is transferred to the conveyor belt 41 of the electrostatic module 4, and the release film 12 is guided by the steering roller 23 to be moved in the retracting direction 71, and subjected to The second roller 22 is wound up. Since the electrostatic generator 42 can provide static electricity to the conveyor belt 41, the conveyor belt 41 can generate an adsorption force to the optical film 11 through static electricity, thereby facilitating the peeling of the optical film 11 from the release film 12, and at the same time, The generated electrostatic attraction can also cause the optical film 11 to be flatly conveyed on the conveyor belt 41 to prevent the optical film 11 from being warped. Then, the optical film 11 is continuously transported in the unwinding direction 70, and the ion wind blown by the static remover 43 is used to remove static electricity, so that the optical film 11 can enter the bonding roller 51 of the bonding module 5. And being driven by the wheels 52 to be conveyed toward the bonding direction 72. At this time, the panel transport module 6 also transports the panel 10 into the bonding rollers 51. The optical film 11 corresponds to the position of the panel 10, and the optical film 11 and the panel 10 are along the same. When the direction 72 is conveyed and passed between the bonding rollers 51, the bonding rollers 51 can be rolled and bonded to each other, and the operation of attaching the optical film 11 to the panel 10 is completed. Finally, the static electricity remover 53 is used to remove the static electricity of the bonded optical film 11 and the panel 10 to prevent the components from being damaged by residual static electricity.

It is worth mentioning that the voltage applied by the electrostatic generator 42 is preferably -20 kV to -80 kV, wherein the negative sign refers to a negative voltage, which enables the conveyor belt 41 to form a negatively charged static electricity, and the voltage The higher the value, the greater the applied voltage. When the value of the applied voltage is less than 20 kV, since the voltage value is too small, the electrostatic adsorption force generated is smaller than the peeling force required for the release film 12, which is disadvantageous for peeling off the optical film 11 and the release film 12. When the value of the applied voltage is more than 80 kV, since the voltage value is too large, a spark is easily generated to cause the optical plate 1 to deteriorate or even be damaged.

Table 1 shows that the electrostatic generator 42 inputs different voltage values, namely -10 kV, -20 kV, -30 kV, and four different conveying speeds of the conveyor belt 41, respectively, 10 meters/minute, 20 meters/ Minutes, 30 meters/minute, 40 meters/minute, and the electrostatic value generated by the conveyor belt 41 is measured at different positions from the conveyor belt 41 at 10 cm, 15 cm, 20 cm, 30 cm, and the like. When the applied voltage value is set to -10 kV, the value of the negatively charged electrostatic value of the conveyor belt 41 is generally not high, and when the applied voltage is -20 kV, -30 kV, the negatively charged electrostatic value of the conveyor belt 41 is large enough. Further, the optical film 11 can be made to have a sufficient adsorption force.

<Table 1> Conveyor belt electrostatic loading test         <TABLE border="1" borderColor="#000000" width="_0001"><TBODY><tr><td> voltage setpoint (kV) </td><td> conveyor speed (m/min) </td><td> Measurement distance (cm) </td><td> Conveyor belt electrostatic value (kV) </td></tr><tr><td> -10 </td><td> 10 </td><td> 10/15/20/30 </td><td> -0.7/-0.9/-0.8/-0.8 </td></tr><tr><td> -20 < /td><td> -2.6/-3.0/-3.0/-3.0 </td></tr><tr><td> -30 </td><td> -5.3/-6.0/-6.2/- 6.4 </td></tr><tr><td> -10 </td><td> 20 </td><td> 10/15/20/30 </td><td> -1.4/- 1.3/-1.5/-1.5 </td></tr><tr><td> -20 </td><td> -3.0/-3.3/-3.4/-3.5 </td></tr>< Tr><td> -30 </td><td> -5.3/-6.0/-6.3/-6.3 </td></tr><tr><td> -10 </td><td> 30 < /td><td> 10/15/20/30 </td><td> -1.7/-1.8/-1.9/-1.8 </td></tr><tr><td> -20 </td ><td> -3.3/-3.3/-3.5/-3.5 </td></tr><tr><td> -30 </td><td> -5.3/-5.7/-6.2/-6.2 < /td></tr><tr><td> -10 </td><td> 40 </td><td> 10/15/20/30 </td><td> -2.0/-2.0/ -2.2/-2.2 </td></tr><tr><td> -20 </td><td> -3.3/-3.5/-3.7/-3.8 </td></tr><tr> <td> -30 </td><td> -5.3/-5.7/-6.2/-6.2 </td></tr></TBODY></TABLE>

In summary, the static electricity generator 42 of the electrostatic module 4 provides static electricity to the conveyor belt 41, and the adsorption force of the conveyor belt 41 on the optical film 11 is increased by static electricity, and the steering roller 23 can be used to assist the electrostatic roller. The optical film 11 is peeled off from the release film 12, and the bonding process is smoothly performed. Moreover, since the optical film 11 can be flatly attached to the conveyor belt 41, the warp deformation caused by the peeling stress can be effectively solved, and the optical film 11 can be flattened after entering the bonding module 5. After the matching force of the bonding module 5 is matched, the overall bonding force can be improved, and the optical film 11 can be evenly flattened to the panel 10. Therefore, the invention can directly cut the coil material into the sheet material and directly paste the panel 10, thereby eliminating the quality defect problem or the yield loss which may be caused by the intermediate process, thereby improving the process yield and the product quality.

However, the above is only the embodiment of the present invention, and the scope of the invention is not limited thereto, and all the equivalent equivalent changes and modifications according to the scope of the patent application and the patent specification of the present invention are still The scope of the invention is covered.

1‧‧‧Optical board
10‧‧‧ panel
11‧‧‧Optical film
12‧‧‧ release film
2‧‧‧Feed module
21‧‧‧First wheel
22‧‧‧Second wheel
23‧‧‧Steering wheel
3‧‧‧Tools
4‧‧‧Electrostatic module
41‧‧‧Conveyor belt
411‧‧‧ first side
412‧‧‧ second side
42‧‧‧Electrostatic generator
43‧‧‧Electrostatic remover
5‧‧‧Fitting module
51‧‧‧Fitting roller
52‧‧‧Runner
53‧‧‧Electrostatic remover
6‧‧‧ Panel conveyor module
61‧‧‧Drive roller
62‧‧‧ Panel positioning seat
70‧‧‧Without direction
71‧‧‧Retraction direction
72‧‧‧Finishing direction

Other features and effects of the present invention will be apparent from the following description of the drawings, wherein: Figure 1 is a side elevational view of a known laminating apparatus for affixing an optical film The invention is directed to a liquid crystal panel; and FIG. 2 is a side elevational view showing an embodiment of the optical film-to-panel bonding apparatus of the present invention, and illustrates the implementation for attaching an optical film to a panel.

1‧‧‧Optical board

10‧‧‧ panel

11‧‧‧Optical film

12‧‧‧ release film

2‧‧‧Feed module

21‧‧‧First wheel

42‧‧‧Electrostatic generator

43‧‧‧Electrostatic remover

5‧‧‧Fitting module

51‧‧‧Fitting roller

52‧‧‧Runner

53‧‧‧Electrostatic remover

22‧‧‧Second wheel

23‧‧‧Steering wheel

3‧‧‧Tools

4‧‧‧Electrostatic module

41‧‧‧Conveyor belt

411‧‧‧ first side

412‧‧‧ second side

6‧‧‧ Panel conveyor module

61‧‧‧Drive roller

62‧‧‧ Panel positioning seat

70‧‧‧Without direction

71‧‧‧Retraction direction

72‧‧‧Finishing direction

Claims (10)

An optical film-to-panel bonding device is suitable for bonding the optical film of an optical plate to the panel, the optical plate further comprising a release film on the surface of the optical film, the optical film is attached to the panel The combining device comprises: a feeding module for conveying the optical plate along a predetermined path; a cutter located on the predetermined path for cutting the optical film of the optical plate into a predetermined size; and an electrostatic module comprising a conveyor belt on one side of the cutter for conveying the cut optical film, and an electrostatic generator on the side of the conveyor belt for providing static electricity to the conveyor belt; and a bonding module located at the static electricity The optical film transferred from the electrostatic module is attached to the panel on one side of the module. The optical film-to-panel bonding apparatus according to claim 1, wherein the electrostatic generator is for outputting a voltage, and the electrostatic generator applies a voltage of -20 kV to -80 kV. The optical film-to-panel bonding device according to claim 2, wherein the material of the conveyor belt is rubber, metal, or a mixture of rubber and metal. The optical film-to-panel bonding apparatus of claim 1, wherein the electrostatic module further comprises an electrostatic remover on a side of the conveyor belt for removing static electricity on the conveyor belt. The optical film-to-panel bonding apparatus according to claim 4, wherein the static remover is a blower capable of blowing ion wind to the conveyor belt, or a grounding member capable of grounding the conveyor belt. The optical film-to-panel bonding device of claim 1, wherein the feeding module comprises a first roller for winding the optical plate and for winding the optical plate, and a first The rollers are spaced apart and used to retract the second roller of the release film. The optical film-to-panel bonding apparatus of claim 6, wherein the feeding module further comprises a steering on the predetermined path for guiding the release film toward the second roller Roller. The optical film-to-panel bonding device according to claim 7, further comprising a panel conveying module for conveying the panel in a bonding direction, the panel conveying module comprising a plurality of spacings along the bonding direction Arranged drive rollers. The optical film-to-panel bonding apparatus according to claim 8, wherein the release film is conveyed from the steering roller toward the second roller in a retracting direction opposite to the bonding direction, and the optical film passes through the optical roller. The bonding module is transported along the bonding direction, and the bonding module adheres the optical film conveyed along the bonding direction to the panel. The optical film-to-panel bonding device according to any one of claims 1 to 9, wherein the bonding module comprises two spaced apart matching rollers, and the optical film and the panel can pass the stickers The rollers are rolled and pressed against each other by the bonding rollers.