TWI577535B - System for laminating optical film and method for manufacturing display unit using the same - Google Patents

Description

System for pressing optical film and method for manufacturing display unit therewith

The present invention relates to a system for pressing an optical film and a method for manufacturing the same using the same, and more particularly to a system for attaching an optical film, which is capable of attaching an optical film to two surfaces of a panel constituting the display device. The production efficiency in the process and the efficiency in space utilization, and the method of manufacturing the display unit using the system.

The present invention claims priority to Korean Patent Application No. 10-2014-0002582, filed on Jan. 8, 2014, the disclosure of which is incorporated herein by reference.

The present invention also claims priority to Korean Patent Application No. 10-2014-0034705, filed on Jan. 25, 2014, the disclosure of which is incorporated herein by reference.

For use as a display device, a display unit is manufactured by a manufacturing system, which is implemented by attaching an optical film, such as a polarizing film, to both surfaces of the panel, and according to the related art, FIG. 1 is a conceptual example portion. A system for manufacturing a display unit, and FIG. 2 is an example of a process for manufacturing a display unit by a manufacturing system.

Referring to FIG. 1 and FIG. 2, by providing an optical film 2 and a release sheet 1 attached to a surface thereof to a panel 3, the optical film 2 is cut to correspond to the size of the panel 3. And pressing the optical film 2 to one surface of the panel while removing the release sheet 1 attached to the optical film 2, and thereafter, pressing the optical film 2 to the panel 3 in the same process The other surface is a display unit.

However, according to the process of manufacturing the display unit in the related art, it is necessary to reverse the process of the panel 3, and therefore, the production efficiency is lowered.

Further, referring to FIG. 3, the optical film 2 attached to the panel 3 corresponds to an example of a polarizing film. When a polarizing film is attached to both surfaces of the panel 3, the attached optical film must be made The absorption axes are perpendicular to each other, and in order to do so, the process of the panel 3 is also required to be rotated.

In order to carry out this additional process, it is necessary to increase the device for reversing/rotating the panel, and increasing the device leads to a growth of the production line, so the space utilization rate is lowered.

The present disclosure is designed to solve the above problems, and therefore, an object of the present invention is to improve the process efficiency of attaching an optical film on both surfaces of a panel.

However, the object of the invention disclosed in the present invention is not limited to the above, and it is obvious to those skilled in the art from the other object of the invention disclosed below.

In order to achieve the above object, according to an exemplary aspect of the present disclosure, a system for pressing an optical film includes: a panel transfer unit for transmitting a panel; and a first press unit for transmitting along a direction parallel to the panel a first direction, on the first surface of the panel, press-fit a full-cut optical film to a predetermined length; a second press-fit unit to be along the same or opposite one of the first directions a second direction, on the second surface of the panel, press-fit a full-cut optical film to a predetermined length, wherein the second pressing unit rotates the optical film in a horizontal direction along the second direction Provided in a fully cut state and pressed against the optical film.

The panel transfer unit can include a conveyor belt to support and transport the panel.

The panel transfer unit can include a transfer roller to support and transport the panel.

The panel transfer unit can have a width corresponding to the width of the panel.

The first pressing unit may include: a first feeding roller to provide an optical film; a first cutting blade to completely cut the provided optical film to a predetermined length; a first pressing drum The optical film is embossed and pressed on the first surface of the panel; and a first film holding portion is disposed over the optical film to oppose the first pressing drum to hold the sticker Attached to one of the optical films, the release sheet is separated.

The first press unit may include: a first film cartridge to provide a full cut of the optical film to replace the first feed roller and the first cutter, wherein the first film cartridge is pre-filled Cut the plural optical film.

The first press drum may have a first adsorption hole formed on one circumference.

A first absorbent pad can be attached to the circumference of the first press drum.

The second pressing unit may include: a second feeding roller to provide an optical film; a second cutting blade to completely cut the provided optical film to a predetermined length; a rotating device for Rotating in a horizontal direction to the optical film of the predetermined length; a second pressing drum for adsorbing and pressing the optical film rotated in the horizontal direction on the second surface of the panel; The two holding film portion is disposed across the optical film and opposite to the second pressing drum to hold the release sheet attached to the optical film to separate the release sheet.

The second press unit may include: a second film cartridge to provide a full cut of the optical film to replace the second feed roller and the second cutter, wherein the second film cartridge is pre-filled Cut the plural optical film.

The rotating device can be rotated by 90 degrees.

The second press drum may have a second adsorption hole formed on one circumference.

a second adsorption pad can be attached to the second pressing drum On the periphery.

Moreover, the above object can also be achieved according to a method for manufacturing a display unit according to an exemplary embodiment of the present invention, and the method for manufacturing the display unit comprises: (a) providing a panel for manufacturing a display unit; (b) Pressing a full cut to a predetermined length of the optical film on the first surface of the panel in a first direction parallel to one of the directions of transmission of the panel; and (c) Or opposite to the second direction of the first direction, on a second surface of the panel, press-fit a full-cut optical film to a predetermined length, wherein the second direction is in a full-cut state The optical film provided is rotated and pressed in a horizontal direction.

This step (c) can be carried out simultaneously or subsequently with the step (b).

The step (c) may comprise: (c1) using a second feed roller to provide an optical film along the second direction; (c2) fully cutting the optical film provided; (c3) at a level Rotating the optical film in a full direction; and (c4) adsorbing and pressing the optical film rotated in the horizontal direction on the second surface of the panel using a second press drum.

The step (c3) may include rotating the optical film at 90 degrees in the horizontal direction.

The step (c) may include: using a second film to provide the optical film along the second direction, wherein the second film is provided with a plurality of pre-cut multiple optical films; rotating in a horizontal direction Providing the optical film; and using a second press drum to adsorb and press on the second surface of the panel The optical film rotated in the horizontal direction.

According to the disclosure of the present invention, it is not necessary to rotate and/or reverse the process of a panel, which improves the production efficiency. Further, in the case where an optical film is provided in a roll type, when a large number of defects appear on the optical film roll, only The parts are fed in a fully cut and chip-type, thus improving productivity.

1‧‧‧ release film

2‧‧‧Optical film

3‧‧‧ panel

10‧‧‧Panel transfer unit

20‧‧‧First press unit

30‧‧‧Second press unit

D‧‧‧ display unit

P‧‧‧ panel

F‧‧‧Optical film

F1‧‧‧ optical film

F2‧‧‧ optical film

L1‧‧‧ unit length

L2‧‧‧ unit length

W1‧‧‧Width

W2‧‧‧Width

M1‧‧‧ absorption axis

M2‧‧‧ absorption axis

S‧‧‧ release film

21‧‧‧First feed roller

22‧‧‧First press drum

23‧‧‧First film holding department

24‧‧‧First Knife

25‧‧‧First film

H‧‧‧Adsorption holes

G‧‧‧ adsorption tank

22a‧‧‧Adsorption pad

30‧‧‧Second press unit

31‧‧‧Second feed roller

32‧‧‧Second press drum

33‧‧‧Second film holding department

34‧‧‧second knife

35‧‧‧Second membrane

36‧‧‧Rotating device

The drawings illustrate the preferred embodiments of the present invention and the foregoing, and provide a further understanding of the technical spirit of the present invention. Therefore, the present invention is not to be construed as limited by the drawings.

Fig. 1 is a conceptual diagram illustrating a system of a laminated optical film according to the related art.

2 is a flow chart illustrating a system for using the laminated optical film shown in FIG. 1 according to a process in the related art.

3 and 4 are schematic views showing a direction in which an absorption axis of a pair of polarizing films is formed, and each polarizing film is attached to both faces of the panel shown in FIG.

Figure 5 is a conceptual diagram illustrating a system for pressing an optical film in accordance with an exemplary embodiment of the present invention.

Fig. 6 is a schematic view showing an optical film pressing direction of the first press unit and the second press unit shown in Fig. 5.

7 and 8 are schematic views showing an example of the implementation of the first nip unit shown in FIG. 5.

9 and 10 are schematic views showing an example of the implementation of the press drum shown in Figs. 7 and 8.

11 and 12 are schematic views showing an example of the implementation of the second nip unit shown in FIG. 5.

The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Before the description, the terms used in the specification and the scope of the claimed patent application should not be limited to the meaning of the daily or dictionary, but should be based on the meaning of the inventor's permission to explain the best interpretation, based on the corresponding invention. Interpretation of the meaning and concept of technology. Therefore, the present invention is to be construed as being limited to the preferred embodiments of the present invention, and is not intended to limit the scope of the invention. .

First, the overall construction of a system for embossing an optical film according to an exemplary embodiment of the present invention will be described with reference to FIG.

Figure 5 is a conceptual diagram of a system for embossing an optical film in accordance with an exemplary embodiment of the present invention.

Referring to FIG. 5, a system for pressing an optical film according to an exemplary embodiment of the present invention includes a panel transfer unit 10, a first press unit 20, and a second press unit 30.

The panel transfer unit 10 transfers a panel P attached to the optical film F in the system and has a width corresponding to the panel P.

As means for supporting and conveying the panel P, various means such as a conveyor belt or a feed roller can be used.

The first pressing unit 20 and the second pressing unit 30 are disposed on the conveying line of the panel to press the optical films F1 and F2 on the first surface and the opposite second surface of the panel P, respectively.

The specific functions and construction of the first press unit 20 and the second press unit 30 will be described later in detail with reference to Figures 6 through 12.

First, referring to Fig. 6, the pressing direction on the first surface of the panel P and the pressing direction on the second surface are described.

Fig. 6 is a schematic view showing an optical film pressing direction of the first press unit and the second press unit shown in Fig. 5.

Referring to Fig. 6, the optical film F1 pressed on the first surface of the panel P and the optical film F2 pressed on the second surface are pressed in mutually parallel directions.

That is, together with FIG. 5 and FIG. 6, the first pressing unit 20 and the second pressing unit 30 are on the first surface and the second surface of the panel P in a direction parallel to the transmission direction of the panel P, The optical films F1 and F2 are pressed together.

Moreover, the width W1 and the length L1 of the optical film F2 attached to the second surface of the panel P are respectively equivalent to the length L2 and the width W2 of the optical film F1 attached to the first surface of the panel.

That is, the second nip unit 30 provides an optical film F2 having a width W1 equal to the unit length L2 of the optical film F1 attached to the first surface of the panel P; it is cut to a unit length L1; The direction is rotated to 90 degrees; and attached to the second surface of the panel P. Wherein, rotating in the horizontal direction means rotating on the plane perpendicular to the plane of the panel P, and Both use the same meaning.

As described above, the optical film F2 attached to the second surface of the panel is rotated such that the absorption axes M1 and M2 of the optical films F1 and F2 form a right angle, in particular, when the optical films F1 and F2 correspond to a polarizing film. In the case of.

Next, the structure of the first press unit 20 will be described in detail with reference to FIGS. 7 and 8.

7 and 8 are schematic views showing an example of the implementation of the first nip unit shown in FIG. 5.

First, referring to FIG. 7, the first pressing unit 20 may include a first feeding roller 21, a first pressing drum 22, a first holding portion 23, and a first cutting blade 24.

The first feed roller 21 supplies the optical film F1 in a direction parallel to the moving direction of the panel P around the optical film F1 having the release sheet S attached to a surface.

The first press drum 22 adsorbs the supplied optical film F1 and presses the optical film F1 on the first surface of the panel P.

That is, referring to FIG. 7 and referring to FIG. 6, the first pressing drum 22 adsorbs the optical film F1 cut to a unit length L2, and presses the optical film F1 on the first surface of the panel P.

The first pressing drum 22 may have a nearly cylindrical shape, and when it moves between the panel P and the optical film F1, peeling/adsorbing the optical film F1 from the release sheet S, and pressing on the first surface of the panel P The optical film F1 is combined.

Moreover, the first press drum 22 can have various adsorption structures to The optical film F1 is adsorbed on its periphery, and an example of the adsorption structure is illustrated in FIGS.

First, referring to Fig. 9, the first press drum 22 may have a plurality of adsorption holes H formed on the periphery thereof. The inner space of the first pressing drum 22 can be connected to a vacuum pump (not shown), and when the vacuum pumping operation, the optical film F1 is adsorbed on the circumference of the first pressing drum 22.

Next, referring to FIG. 10, the adsorption pad 22a having the plurality of adsorption grooves G can be attached to the periphery of the first pressure-bonding drum 22.

As described above, the first pressing drum 22 having the surface structure of the adsorbable optical film F1 adsorbs the optical film F1 separated from the release sheet S on the periphery in a direction perpendicular to the moving direction of the panel P, and rotates on a horizontal surface. The optical film F1 is pressed at approximately 90 degrees, and the optical film F1 is pressed against the panel P in a direction parallel to the moving direction of the panel P.

Here, the adhesion between the panel P and the optical film F1 is achieved by an adhesive layer formed on a surface of the optical film F1 on which a sheet S has been attached.

Referring back to FIG. 7, the first film holding portion 23 is disposed across the optical film F1 opposite to the first pressing drum 22 to hold the release sheet, so that the release sheet S attached to the optical film F1 can be obtained. Separation.

The first film holding portion 23 is not limited to a specific structure, as long as the first pressure bonding drum 22 adsorbs the optical film F1 and moves toward the panel P, the structure thereof can hold the release sheet S, so that the release sheet S Separating from the optical film F1, for example, an adsorption structure used in the first press drum 22 shown in Fig. 9 can be employed.

The first cutter 24 is disposed between the first feed roller 21 and the first film holding portion 23, and the optical film F1 is completely cut to a predetermined length. Wherein, the full cutting means cutting all the optical film and the release sheet S attached to one surface of the optical film F1, and the cutting length of the optical film F1 is determined based on the length of the panel P, which is relative For half-cutting, it means that only the optical film F1 is cut to leave a complete release sheet S.

When the full-cutting technique is used, the length of the optical film F1 can be limited to less than a predetermined degree, so that the flatness is relatively easy to maintain, so that the operation accuracy is improved, and thus the quality of the optical film F1 is improved.

Further, in the optical film F1 is press-fitted on the first surface of the panel P, for the full cutting process, the roll pattern of the first feed roller 21 can be used to continuously supply the optical film F1 as described above. In contrast to this, a chip type can be employed in which the optical film F1 which is pre-completely cut to the panel P size is transferred to the first press drum 22 using a separate transfer device.

That is, in addition to the components shown in FIG. 7, with reference to FIG. 8, the implementation of the first nip unit 20 may further include a first film cartridge 25 to be pre-loaded with a length L2 such as full cut to the length of the corresponding panel P. Complex optical film F1.

The first film cassette 25 corresponds to the element providing the full-cut optical film F1 instead of the first feeding roller 21 and the first cutting blade 24 in FIG.

When the first film cartridge 25 is used, even if many defects are present in the optical film material wound around the first feed roller 21, the defect-free portion can be preselected and fully cut, thereby providing a chip type optical film. , thus improving productivity.

Further, although not explicitly shown in the drawing, the transfer of the optical film F1 between the first film stack 25 and the first film holding portion 23 can be performed by an independent transfer device.

Then, the structure of the second nip unit 30 will be described in detail with reference to Figs.

11 and 12 are schematic views showing an example of the implementation of the second nip unit shown in FIG. 5.

First, the implementation of the second pressing unit 30 may include: a second feeding roller 31, a rotating device 36, a second pressing drum 32, a second holding portion 33, and a first Two cutters 34.

The second feeding roller 31, the second pressing drum 32, the second holding film portion 33, and the second cutting blade 34 respectively correspond to the first feeding roller 21 substantially as described above. The first pressing drum 22, the first holding film portion 23, and the first cutting blade 24 are the same elements, and the repeated description thereof is omitted here.

The rotating device 36 is wound around the optical film F2 supplied from the second feeding roller 31 to provide the optical film F2 in a moving direction parallel to the panel P.

The rotating device 36 rotates the optical film F2 supplied from the second feed roller 31 by 90 degrees in the horizontal direction. That is, the absorption axes M1 and M2 of the optical films F1 and F2 attached to the first surface and the second surface of the panel P are approximately perpendicular to each other with the direction perpendicular to the extending direction of the panel P as a rotation axis.

Wherein, in order to rotate the optical film F2 placed on the rotating device 36, the rotating device 36 is not limited to a specific type as long as it is rotated in a direction perpendicular to the extending direction of the panel P, and may be implemented, for example, to support and rotate the rotating film 36. One way of rotating the panel of one of the optical films F2.

The optical film F2 completely cut by the second cutter 34 can be transferred to the rotating device 36 by an independent transfer device, and the transfer between the rotating device 36 and the film holding portion 33 can also be performed by an independent transfer device.

Further, in the press-fit optical film F2 on the second surface of the panel P, in order to perform the full-cutting process, the roll pattern of the second feed roller 31 can be used to continuously provide the optical film F2 as described above. Thus, a chip type can be employed in which the optical film F2, which is pre-cut to the panel P size, is transferred to the rotating device 36 and the second pressing drum 32 using a separate transfer device.

That is, in addition to the components shown in FIG. 11, with reference to FIG. 12, the second embossing unit 30 may further include a second film stack 35 for pre-loading a plurality of lengths L1, such as full-cut to the width of the corresponding panel P. Optical film F2.

The second film cassette 35 corresponds to the element providing the full-cut optical film F2 instead of the second feeding roller 31 and the second cutting blade 34 in FIG.

When the second film stack 35 is used, as in the case of the first press unit 20 described above, even if a large number of defects are present in the optical film material wound around the second feed roller 31, the defect-free portion can be used in advance. Selected and fully cut, thus providing a chip-type optical film, thereby improving productivity.

As described above, in the display unit D (see FIG. 5) manufactured by pressing the optical film on both sides of the panel, the construction of the press-fit optical film system according to an exemplary aspect of the present invention not only causes the pressure on the first surface The combined direction and the pressing direction on the second surface are parallel to each other, and also serve as the first surface The feeding direction of the laminated optical film F1 and the feeding direction of the optical film F2 which is pressed on the second surface are parallel to each other.

Therefore, according to the press optical film system of the present invention, space efficiency can be maximized by minimizing the width occupied by the device.

Further, according to the construction of the press-fit optical film system of the present invention, the optical film F2 is rotated 90 degrees on the horizontal surface before the pressure-bonding drum 32 adsorbs the optical film F2, so that the optical film absorption axis attached to both sides of the panel is of course The lines are perpendicular to each other.

The present invention has been described in detail. However, it will be apparent to those skilled in the art that <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; The specific embodiments are for illustrative purposes only.

10‧‧‧Panel transfer unit

20‧‧‧First press unit

30‧‧‧Second press unit

D‧‧‧ display unit

P‧‧‧ panel

F‧‧‧Optical film

F1‧‧‧ optical film

F2‧‧‧ optical film

Claims (18)

A system for pressing an optical film, comprising: a panel transfer unit for transmitting a panel along a straight line; a first press unit for a first direction along a direction parallel to the panel transfer direction, one of the panels On the first surface, press-fit a first optical film to a predetermined length; a second pressing unit to be in the second direction along the same or opposite to the first direction, on the panel a second surface, a second optical film that is fully cut to a predetermined length, wherein the second nip unit is along the surface of the second optical film before the second optical film is pressed Rotating the second optical film with a vertical axis, which is provided in a fully cut state along the second direction, wherein an absorption axis of the second optical film provided in the fully-cut state along the second direction is parallel An absorption axis of the first optical film is fully cut. A system for compressing an optical film according to claim 1, wherein the panel transfer unit includes a conveyor belt to support and transport the panel. A system for compressing an optical film according to claim 1, wherein the panel transfer unit includes a transfer roller to support and transport the panel. The system for pressing an optical film according to claim 1, wherein The panel transfer unit has a width corresponding to the width of the panel. The system for pressing an optical film according to claim 1, wherein the first pressing unit comprises: a first feeding roller to provide the first optical film; and a first cutting blade to The first optical film provided by the first feeding roller is completely cut to a predetermined length; a first pressing drum is pressed and pressed on the first surface of the panel by the first cutting knife Fully cutting the first optical film; and a first film holding portion disposed over the first optical film opposite to the first pressing drum to hold the release film attached to the first optical film, The release sheet is allowed to separate. The system of embossing an optical film according to claim 5, wherein the first nip unit comprises: a first film lining to provide a full cut of the first optical film to replace the first film a roll and the first cutter, wherein the first film is loaded with a plurality of the first optical film which is pre-cut. The system for compressing an optical film according to claim 5, wherein the first pressure-bonding drum has a first adsorption hole formed at one of the peripheral edges. The system of embossing an optical film according to claim 5, wherein a first adsorption pad is attached to the circumference of the first pressure-bonding drum. The system for pressing an optical film according to claim 1, wherein the second pressing unit comprises: a second feeding roller to provide the second optical film; and a second cutting knife to The second optical film provided by the second feeding roller is completely cut to a predetermined length; a rotating device is fully cut to the predetermined length along the vertical axis on the surface of the second optical film a second optical film; a second pressing drum for adsorbing and pressing the second optical film rotated by the rotating device on the second surface of the panel; and a second film holding portion disposed over The second optical film is opposite to the second pressing drum to hold the release sheet attached to the second optical film to separate the release sheet. The system of embossing an optical film according to claim 9, wherein the second nip unit comprises: a second film raft to provide a full cut of the second optical film to replace the second film a material roll and the second cutter, wherein the second film is provided with a plurality of the second optical film which is pre-cut. A system for pressing an optical film according to claim 9, wherein the rotating device rotates at 90 degrees. The system for pressing an optical film according to claim 9, wherein The second press drum has a second adsorption hole formed at one of the peripheral edges. The system of embossing an optical film according to claim 9, wherein a second adsorption pad is attached to the circumference of the second pressure-bonding drum. A method of manufacturing a display unit, comprising: (a) providing a panel for manufacturing a display unit; (b) a first direction in a direction parallel to a direction of transmission of the panel, a portion of the panel a surface of a first optical film that is fully cut to a predetermined length; and (c) a second surface of the panel along a second direction that is the same or opposite to the first direction Upper pressing, to a second optical film of a predetermined length, wherein the second optical film system is provided in a fully cut state along the second direction before the second optical film is pressed Rotating along a vertical axis on the surface of the second optical film, wherein an absorption axis of the second optical film provided in the fully-cut state along the second direction is parallel to the full-cut first optical film An absorption axis. The method of manufacturing a display unit according to claim 14, wherein the step (c) is performed simultaneously or subsequently with the step (b). The method of manufacturing a display unit according to claim 14, wherein the step (c) comprises: (c1) using a second feed roller to provide the second optical film along the second direction; (c2) completely cutting the second optical film provided by the second feed roller; (c3) rotating the second optical film along the vertical axis on the surface of the second optical film; and (c4) adsorbing and using the second pressing drum on the second surface of the panel The second optical film that is rotated is pressed. The method of manufacturing a display unit according to claim 16, wherein the step (c3) comprises: rotating the second optical film by 90 degrees along the vertical axis on a surface of the second optical film. The method of manufacturing a display unit according to claim 14, wherein the step (c) comprises: using a second film to provide the second optical film along the second direction, wherein the The second film is provided with a plurality of pre-completed plurality of the second optical film; the second optical film is provided by the vertical axis on the surface of the second optical film; and a second pressing drum is used to adsorb and The rotated second optical film is pressed against the second surface of the panel.