KR101577278B1 - Apparatus for attaching film of bended display panel and method the same - Google Patents

Abstract

The present invention relates to an apparatus and a method for attaching a film to a bending display panel, the apparatus comprising: a head unit for fixing a bending display panel; A film installation unit spaced apart in alignment with the head unit and fixing the adhesive sheet to which the film is attached; And a pressure unit for applying a pressing force to the adhesive sheet to adhere the film to the bending display panel. When the curved display panel is viewed from the side, the pressing unit is installed so as to be horizontally, vertically, And a method of attaching a film to a folding display panel.

Description

TECHNICAL FIELD [0001] The present invention relates to an apparatus and a method for attaching a film to a bending display panel,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus and a method for attaching a film to a bending display panel, and more particularly, to a film attaching apparatus for a bending display panel for a display which can automatically attach a film to a display panel used in a display window of a mobile phone, ≪ / RTI >

Recently, as a transmission medium for image information, a great deal of attention has been focused on the miniaturization and high-quality of the display device, and it is noted that various display devices have been developed and popularized.

Particularly, as various portable electronic devices such as a mobile phone, a PDA, a notebook computer, a tablet PC, and the like are developed, there is a growing need for a display device for a lightweight and small-sized display.

Examples of such a display device include a liquid crystal display (LCD), a plasma display panel (PDP), a light emitting diode (LED), a field emission display (FED), and a vacuum fluorescent display (VFD).

In particular, a film is attached to the panel of such a display device to determine the optical characteristics of each display.

Specifically, the film refers to a polarizing film that is used in a display by combining a polarizing film having a polarizing function property of passing light in a certain direction of light while reflecting the remaining light in a multilayer.

The polarizing film separates the incident light into two polarizing components orthogonal to each other and passes only one of them to absorb or disperse the other components. The polarizing film used in the LCD or the like is composed of a polymeric polarizing medium polarizing incident light, a support TAC (Triacetyl- cellulose is used on both sides of the polarizing medium and the adhesive layer is used to adhere the polarizing film to the protective film.

An anti-glare (AG) or anti-reflection (AR) coating layer and a protective film are provided on the upper surface of the polarizing film.

The light emitted from the backlight of the aforementioned LCD module has the same probability of vibration direction in all directions. The polarizing film transmits only the light vibrating in the same direction as the polarization axis from the light, and the light vibrating in the other direction absorbs or reflects the light using a suitable medium to produce light oscillating in a specific direction.

Since the polarization axes of the polarizing films are attached to both sides of the liquid crystal cell such that the polarizing axes thereof are orthogonal or parallel to each other, the strength of the transmitted light is adjusted according to the degree of rotation of the polarization axis during passing through the liquid crystal cell, And gray representation between white and white. As such, the polarizing film is one of the essential components of the TN Mode LCD.

Therefore, the operation of attaching the above-described polarizing film to both sides of the panel of the display device is a very precise and important work.

A representative example of such a film adhering apparatus for a display panel is disclosed in Korean Patent Laid-Open Publication No. 2009-0066184 (hereinafter referred to as "prior art"), and a schematic configuration of the film- Explain.

As shown in FIG. 1, a film attaching apparatus according to the related art is a device for attaching a film-like member to at least one side of a plate-like member, in which numerous innermost recesses are formed in the surface, (10) for conveying the film-like member (F) held on the adsorbing member (11) along a predetermined path, the adsorbing member (11) holding the adsorbing member (11) And a pressing means 6 for pressing the film-like member F and the plate-like member P held and held by the adsorption member 11, wherein the pressing means 6 is a plate- P so that the conveying means 10 and the attracting member 11 are partly pushed and the attachment surface of the film-like member F is pressed against the plate member P and the pressing means 6 is rotated At the same time, as the plate member P moves, the film member F is attached to the plate member P All.

However, according to this conventional technique, when the plate member P has a shape that is not flat but partially bent, it is difficult to apply a uniform pressing force to the film, so that a local peeling phenomenon may occur after attachment.

Korean Patent Publication No. 2009-0066184 (June 23, 2009)

SUMMARY OF THE INVENTION The present invention has been conceived to solve the problems as described above, and it is an object of the present invention to provide a bending display device capable of applying a uniform pressing force to a film, And an apparatus and a method for attaching a film to a panel.

According to an aspect of the present invention, there is provided an apparatus for attaching a film to a display panel,

A head unit fixing the bending display panel;

A film installation unit spaced apart in alignment with the head unit and fixing the adhesive sheet to which the film is attached;

And a pressing unit for applying a pressing force to the adhesive sheet to attach the film to the bending display panel,

When the curved surface display panel is viewed from the side, the pressing unit is installed to be able to move horizontally, vertically, and rotationally.

And the head unit is configured to be rotatable when viewed from the side of the folding display panel.

And the pressure unit includes a pressure roller that moves up and down and moves at a position corresponding to the adhesive sheet.

The film installation unit includes:

A fixing plunger for fixing both ends of the adhesive sheet to both sides of the corresponding frame,

And a cylinder device that applies a pressing force to the adhesive sheet itself so as to maintain the tension.

And the hinge unit is movable in the horizontal direction.

According to another aspect of the present invention, there is provided a method of attaching a film to a folding display panel,

Maintaining the head unit and the film installation unit in place;

The pressing unit located at a lower portion of the film installation unit is raised so as to apply a pressing force to the position of the adhesive sheet corresponding to the first entry region where the film is first contacted to the folding display panel;

The pressing unit may slide in the lateral direction along the folding display panel in a state in which the film is closely attached to the folding display panel or if the pressing unit reaches the curved portion of the folding display panel, So that the pressing force from the pressing unit is received almost perpendicularly to the curved surface of the folding display panel, thereby preventing a decrease in the load for bonding on the curved surface.

Releasing the pressing force and returning to the initial position when the pressing unit descends from the adhesive sheet when the pressing unit reaches the position of the adhesive sheet corresponding to the final separation area where the film last touches the bending display panel;

And moving the head unit to which the bending display panel with the attached film is fixed to the next process.

And adjusting the rotation angle of the head unit before the step of applying the pressing force.

According to the present invention having the above-described constitution, in a state in which the head unit and the film installation unit are aligned in a proper position, the rotation urging member of the pressurizing unit is inclined and presses in the direction nearly perpendicular to the bent surface, It can be attached to the bent surface of the bending display panel with a uniform pressing force, so that there is an advantage that the local peeling phenomenon can be prevented.

According to the present invention, since the head unit itself can be rotated, the acting direction of the pressing force can be directed almost perpendicularly to the curved surface without rotating the pressing unit, so that the pressing force can be uniformly applied to the display panel There is an advantage that the quality is greatly improved.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic view showing a conventional film attaching apparatus for a display panel.
2 is a perspective view showing an example of a folding display panel.
3 is a side view showing a film adhering apparatus of a display panel according to an embodiment of the present invention.
4 is a perspective view showing the structure of the film installation unit in Fig.
5 is a side view showing a film adhering apparatus of a display panel according to another embodiment of the present invention.
6 is a configuration diagram illustrating an operation of a film adhering apparatus of a display panel according to another embodiment of the present invention.
7 is a view illustrating a state in which a film is attached to a display panel according to another embodiment of the present invention.
FIG. 8 is a detailed view showing a state where a film is attached to a display panel according to another embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to FIGS. 2 to 8. FIG.

As shown in Fig. 2, in the following description, it is known that the folding display panel P refers to a panel having a folded surface B formed on at least a part of an edge portion of a flat horizontal surface H. The curved surface B may be a circular arc surface, a general curved surface, or a bent surface.

The folding display panel P is loaded with its position aligned on the head unit 100 and then transported to the attaching position for attaching the film F via the transporting device.

The adhesive sheet S to which the film F is attached is automatically picked up on the film installation unit 200 and loaded.

4, the film fixing unit 200 is provided below the head unit 100 with a space therebetween, and the adhesive sheet S is extended between the frames 210 spaced apart from each other In a frame assembly.

At this time, a fixing plunger 220 for fixing both ends of the adhesive sheet S is provided on both sides of the corresponding frame 210, and a pressing force is applied to maintain the constant tension without stretching the adhesive sheet S itself A cylinder device 230 is provided.

The image information of the film installation unit 200 photographed through the vision camera is input to a control unit (not shown), and the position of the head unit 100 is corrected by the inputted position value, The film installation unit 200 is held in the correct position.

3, in the apparatus for attaching a film of the folding display panel P according to the embodiment of the present invention, the head unit 100 is mounted on one surface, that is, on the lower surface by a vacuum, P).

At this time, a plurality of vacuum holes (not shown) are formed in the jig 150 formed at the lower portion of the head unit 100 to fix the bending display panel P by a vacuum pressure of a vacuum device .

 Here, the head unit 100 is maintained in a stopped or rotated state during the process of attaching the film F to the folding display panel P, and the process of attaching the film F is completed, The movement process is started upon returning to the home position.

The film installation unit 200 is provided at a lower portion of the head unit 100 and is formed as a frame assembly in which the adhesive sheet S is extended and supported between the frames 210 spaced apart from each other.

Here, the adhesive sheet (S) has a double bond structure in which a base layer and an adhesive layer are combined to form a base layer. The base layer is a SUS or Teflon material having a constant elongation, Of the adhesive layer is applied.

The adhesive layer of the adhesive sheet (S) is an object to which the film (F) is adhered, and is generally made of an elastic material containing an adhesive having a predetermined adhesive strength, but other elastic materials corresponding to silicon or the like May be applied.

The condition for the adhesive force of the adhesive sheet S to the film F is relatively low compared with the adhesion force of the film F attached to the foldable display panel P, Do.

In other words, when the adhesion force of the film F to be adhered to the adhesive sheet S is greater than the adhesion force of the film F to the bending display panel P, Which is not adhered to the wafer W, may occur.

3, the pressing unit 300, which provides power for attaching the film F to the folding display panel P, includes a linear moving member 350, a linear moving member 350, And a rotation urging member 370 provided hingably to the urging device 360 to apply a pressing force to the adhesive sheet S. [

The linearly moving member 350 is composed of a horizontal moving member 351 and a lifting and moving member 352 that moves up and down with respect to the horizontal moving member 351.

The horizontal moving member 351 is movable along the guide rail 520 and is movable by a conveying screw (not shown) and a motor (not shown). However, the horizontal moving member 351 is not limited thereto, 351 may be slidable in the horizontal direction, other means may be adopted.

The lifting and moving member 352 can be lifted and lowered by rotating the feed screw 382 through the normal and reverse driving of the servo motor 381 under the control of a control unit (not shown), or can be lifted and lowered by other pressure cylinders.

As described above, the pressing unit 300 includes a pressing device 360 mounted on the lifting and moving member 352, and a pressing device 360 mounted on the pressing device 360 so as to be hinged to the adhesive sheet S And a rotational urging member 370 for imparting rotational urging force.

Since the pressing device 360 requires a pressing force when the film F is pressed against the bending display panel P, it is preferable to use a pressure cylinder provided with a static pressure regulator (not shown).

The rotary pressing member 370 is hinged by the hinge driving device 378 with respect to the pressing device 360 to apply a uniform pressing force to the adhesive sheet S. [

The rotation pressing member 370 may be attached to the bending display panel P in a state where the rotation pressing member 370 is disposed perpendicularly to the adhesive sheet S, It is possible.

3, when the film F is attached to the bending display panel P with the rotation pressing member 370 being inclined in the moving direction of the horizontally moving member 351, The film F can be pressed with a uniform pressing force as in the horizontal plane H because the pressing is performed in the direction substantially perpendicular to the folding face B of the panel P.

That is, when the rotary pressing member 370 is inclined along the horizontal moving direction of the horizontal shifting member 351, the horizontal surface H of the bending display panel P is moved while being pressed, It is possible to apply a pressing force (for example, a pressing force substantially perpendicular to the curved surface B) in the direction opposite to the curved surface B, (F) can be adhered to the substrate (F), thereby preventing a local peeling phenomenon of the film (F), thereby greatly improving the quality of the film-attached bending display panel (P).

Particularly, a circular pressing rod 371 is provided at the upper end of the rotary pressing member 370, and the pressing rod 371 is moved from the folding plane B The film F can be firmly attached to the bending display panel P by simultaneously pressing the adhesive sheet S in the vertical and horizontal directions.

As a result, the rotary pressing member 370 of the pressing unit 300 is rotated in a state in which the head unit 100 and the film installation unit 200 are aligned with each other, and then the horizontal moving member 351 is horizontally moved The back surface of the adhesive sheet S fixed to the film installation unit 200 is pressed to maintain the close contact state of the film F with respect to the folded display panel P fixed to the head unit 100, And then moves in the horizontal direction (lateral direction) so that the film F can be attached along the folding display panel P. [

Since the adhesive sheet S can be deformed into a curved shape while maintaining a constant tension by the pressing force of the pressing rod 371, the film F can be bent only by the pressing of the pressing rod 371, And is continuously attached to the display panel P while maintaining a linear contact form.

As shown in Figs. 5 and 6, it is also possible that the rotary pressing member 370 is hinged simultaneously with the horizontal movement of the horizontal shifting member 351. Fig.

That is, as the horizontal moving member 351 horizontally moves, the direction of the pressing force applied to the film F by the rotary pressing member 370 is continuously hinged so as to face the surface shape of the folding display panel P Can be moved.

The head unit 100 can be hinged when viewed from the side of the folding display panel P and the nip portion 250 can be formed so that the film installation unit 200 can be bent have.

6, when the film F is attached to the horizontal surface H of the folding display panel P, the head unit 100 is moved in the horizontal direction so that the folding display panel P is kept horizontal The head unit 100 rotates so that the back of the pressurizing unit 300 in the horizontal movement direction is set to be rotated from the moment when it is fixed and enters the folded surface B, It is possible to prevent the film F and the film installation unit 200 from interfering with each other.

It is preferable that the bending angle of the film installation unit 200 is larger than the hinge movement angle of the head unit 100 so as to prevent mutual interference when the head unit 100 is rotated.

7, when the film F is attached to the horizontal surface H of the bending display panel P, the shearing force Fs and the vertical force Fv in the direction parallel to the horizontal plane H act simultaneously When the folded surface B is pressed, a force in a direction substantially perpendicular to the folded surface B can be actuated momentarily.

In this case, a pressing member (not shown) fixed to the pressing device 360 may be used instead of the rotary pressing member 370.

That is, by simply rotating the head unit 100 in a state where the pressing member is fixed, a uniform pressing force can be applied.

 8, when the head unit 100 is movable in the horizontal direction, the film F is also folded on the folded display panel P having the curved surface B at both side ends of the horizontal surface H, Can be easily attached.

A frame for guiding or supporting the head unit 100 when it is horizontally or rotationally moved is not shown in the figure.

Hereinafter, the operation of the present invention will be described in detail based on a configuration in which the head unit 100 is rotatable.

First, the position of the head unit 100 for fixing the folding display panel P is determined through image information about the film installation unit 200 in a state where the film F is attached to the adhesive sheet S and loaded The head unit 100 and the film installation unit 200 are held in the correct position.

Next, the rotation urging member 370 of the pressing unit 300 is rotated by a predetermined angle. The rotational angle of the rotary pressing member 370 is properly set so that the pressing force is directed in the direction opposite to the curved surface B in accordance with the radius of curvature or the size of the curved surface B constituting the folding display panel P. [ .

The lifting and moving member 352 located at the lower portion of the film installation unit 200 is lifted so that the pressing stick 371 located at the upper end of the rotary pressing member 370 lifts the adhesive sheet S, A pressing force is applied to the position of the horizontal plane H so as to start to be attached to the bending display panel P.

The horizontally moving member 351 is moved horizontally so that the film F is continuously attached to the bending display panel P. [

When the pressing rod 371 reaches the folded surface B, the head unit 100 is rotated while the horizontal moving member 351 is horizontally moved as it is while the head unit 100 is fixed, The unit 200 is tilted in the same direction so that the film F and the film installation unit 200 are prevented from interfering with each other while a uniform adhesive force is applied to the folded surface B. [

Thus, even if the pressing rod 371 of the rotary pressing member 370 presses the curved surface B, a uniform adhering force can be exerted on the curved surface B.

When the pressing unit 300 reaches the position of the adhesive sheet S coinciding with the final separation area touched last, the pressing force is released from the adhesive sheet S and returned to the initial position.

Then, the head unit 100 to which the folding display panel P having the film F attached is fixed is moved to the next step.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It should be understood that various modifications made by the person skilled in the art are also within the scope of protection of the present invention.

P, P ': Bending display panel F: Film
S: Adhesive sheet 100: Head unit
200: film installation unit 210: frame
220: stationary plunger 230: cylinder device
300: pressure unit 371: pressure rod
400: lift unit 410: pressure roller support
420: lifting screw 500: sliding means
510: Sliding support 520: Guide rail
530: rotating screw

Claims (10)

A head unit for fixing the bending display panel;
A film installation unit provided at a lower portion of the head unit and fixing the adhesive sheet to which the film is attached; And
And a pressing unit for applying a pressing force to the adhesive sheet to attach the film to the bending display panel,
Wherein the pressing unit includes a horizontal moving member, a vertical moving member moving up and down with respect to the horizontally moving member, a pressing device provided on the vertical moving member, and a pressing member provided hingeably on the pressing device, And a hinge driving device for moving the rotary pressing member by a hinge movement.
The method according to claim 1,
Wherein the head unit is movable in a hinge when viewed from the side of the folding display panel, and the film installation unit is formed with a bar so that the film can be bent.
A head unit for fixing the bending display panel;
A film installation unit provided at a lower portion of the head unit and fixing the adhesive sheet to which the film is attached; And
And a pressing unit for applying a pressing force to the adhesive sheet to attach the film to the bending display panel,
The pressing unit includes a horizontal moving member, a vertical moving member moving up and down with respect to the horizontal moving member, a pressing device provided on the moving member, and a pressing member provided on the pressing device to apply a pressing force to the adhesive sheet ≪ / RTI &
Wherein the head unit is movable in a hinge when viewed from the side of the folding display panel, and the film installation unit is formed with a bar so that the film can be bent.
The method according to claim 2 or 3,
Wherein the bending direction of the film installation unit is the same as the direction of movement of the hinge of the head unit.
5. The method of claim 4,
Wherein the bending angle of the film installation unit is larger than the hinge movement angle of the head unit.
3. The method according to claim 1 or 2,
Wherein the pressure device comprises a pressure cylinder, and a pressure regulator is connected to the pressure cylinder.
The method according to claim 2 or 3,
Wherein the hinge unit is movable in a horizontal direction.
Maintaining the head unit and the film installation unit in place;
The pressing unit located at a lower portion of the film installation unit is raised so as to apply a pressing force to the position of the adhesive sheet corresponding to the first entry region where the film is first contacted to the folding display panel;
When the pressing unit reaches the portion where the folded surface of the folding display panel is formed, the head unit and the film installation unit are moved in the lateral direction along the folding display panel in a state in which the pressing unit closely contacts the folding display panel. And a pressing force from the pressing unit acts on a bent surface of the folding display panel;
Releasing the pressing force and returning to the initial position when the pressing unit descends from the adhesive sheet when the film reaches the position of the adhesive sheet corresponding to the final separation area of the folded display panel to which the film last touches;
And moving the head unit to which the bending display panel having the film attached thereto is fixed, to the next step.
9. The method of claim 8,
Characterized in that the rotary pressing member constituting the pressing unit and pressing the adhesive sheet before the step of applying the pressing force to the position of the adhesive sheet is arranged to be inclined along the horizontal moving direction of the pressing unit A method of attaching a film.
10. The method of claim 9,
Wherein the rotary pressing member is hinged by the horizontal movement of the pressing unit.

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