KR101658432B1 - a sealing method for display panel and a etching method for display panel - Google Patents

Abstract

The present invention relates to an etching method for etching a display panel in the form of a thin film to manufacture a curved display device and a sealing method for etching. The etching method according to an embodiment of the present invention includes the steps of: first coating an acid-resistant sealant on a portion of the display panel to which a tab electrically connecting a drive circuit board to the display panel is attached; A second step of applying a sealant to the upper portion of the sealant applied at the step of performing the sealing; performing a sealing by a sealing method of a display panel including a second step of applying a sealant to the upper portion of the sealant applied at the step of performing the sealing; Performing masking with a masking member so as to form a protruding portion which protrudes to some extent on the display panel on which the both surfaces are etched in total in the primary etching step; In order to reduce the thickness of the remaining portion except for the masked portion, This includes the steps to be followed. Therefore, even a large display panel can be etched at a uniform thickness to produce a large curved display device, and damage to the display panel from the etchant can be minimized.

Description

A sealing method of a display panel for etching a display panel and a method of etching the display panel using the same,

The present invention relates to an etching method for etching a display panel in the form of a thin film to manufacture a curved display device and a sealing method for etching.

In general, a display panel is a panel for displaying an image. In recent years, a curved display device has been disclosed in order to increase the immersion feeling of the image as the technology develops.

The curved display device provides a feeling of immersion because it gives the impression that the viewer is located in the space by bending the viewing side of the image. In the conventional curved display device, the thickness of the flat display panel is made thin, do.

Meanwhile, in order to manufacture a curved display device, the thickness of the display panel may be designed to be thin when initially manufactured. Alternatively, the curved display device may be fabricated so that the thickness of the display panel is thinned. .

As described above, an example of the etching method for reducing the thickness of the display panel is disclosed in Korean Patent Registration No. 10-1468455 (published on Dec. 12, 2014).

In a conventional etching method, a driving circuit unit including a printed circuit board (PCB) is mounted on a display panel unit (not shown) to form a curved display panel by etching a flat surface of a first substrate and a second substrate having liquid crystal layers sandwiched therebetween. Forming a protective layer on the liquid crystal layer in a state of being coupled to the liquid crystal layer; A masking step of masking the non-etching areas of the first and second substrate upper and lower sides and the driving circuit part; A substrate fixing step of fixing the display panel to a substrate holder vertically while supporting a masking part of the driving circuit part; And an etching step of etching the etching regions of the first and second substrate planar portions, whereby the thickness of the display panel can be reduced.

However, in the conventional etching method, since the display panel is etched at one time by the etching liquid, there is a problem that it is difficult to etch the large display panel because the thickness of the etched surface is unevenly etched.

In addition, if the etching liquid flows into the protective cap for protecting the driving circuit portion, the connecting portion is corroded by the etching liquid, thereby damaging the display panel.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and it is an object of the present invention to provide a large display panel which can etch so as to have a uniform thickness, Thereby minimizing damage to the display panel.

According to another aspect of the present invention, there is provided a method of sealing a display panel for etching a display panel, the method comprising the steps of: A step of applying a sealant having an acid resistance to a portion of the display panel to which an electrically connecting tab is attached, and a step of secondarily applying a sealant to the upper portion of the sealant applied in the step of coating the sealant first .

The sealant applied in the second coating step of the sealant may have a viscosity different from that of the sealant applied in the first coating step of the sealant.

The sealant may be applied to both edges of the tab-attached portion of the display panel.

And attaching a support sheet to the display panel for supporting the sealant at the edge of the display panel prior to the first application of the sealant.

In the step of attaching the support sheet to the display panel, the support sheet is wound around the drive circuit board at one edge of the display panel to protect the drive circuit board from the etchant in a form attached to the other edge of the display panel .

The supporting sheet is attached to both sides of the edge of the display panel so that the driving circuit substrate is protected from the etching liquid in such a manner that both sides of the driving circuit substrate are covered with each other, can do.

The support sheet may be enclosed and sealed by a sealing tape having acid resistance, and the sealing tape may be attached in the form of a tile in which the upper and lower ends of the support sheet are partially overlapped on the outer surface of the support sheet to prevent penetration of the etching solution.

And removing the seal member previously installed on the display panel prior to the first application of the sealant.

And removing the polarizing film attached to the display panel prior to the first application of the sealant.

A method of etching a display panel using a sealing method of a display panel according to an embodiment of the present invention is a method of firstly applying an acid resistant sealant to a portion of the display panel to which a tab electrically connecting a drive circuit board to the display panel is attached Performing a second sealing of the sealant on the upper portion of the sealant applied in the first coating of the sealant; performing a sealing by the sealing method of the display panel, Masking is performed with a masking member so as to form protrusions protruding to some extent on the display panel on which both thicknesses of the both sides are etched in the first etching step, in order to reduce the overall thickness of both surfaces of the display panel And masking the masked display panel Except for minute and a step of etching the second to reduce the thickness of the remaining portion.

The sealant applied in the second coating step of the sealant may have a viscosity different from that of the sealant applied in the first coating step of the sealant.

The sealant may be applied to both edges of the tab-attached portion of the display panel.

And attaching a support sheet to the display panel for supporting the sealant at the edge of the display panel prior to the first application of the sealant.

In the step of attaching the support sheet to the display panel, the support sheet is wound around the drive circuit board at one edge of the display panel to protect the drive circuit board from the etchant in a form attached to the other edge of the display panel .

In the step of attaching the supporting sheet to the display panel, the driving circuit board may be attached to both sides of the edge of the display panel, and the driving circuit board may be protected from the etching liquid by being coupled with each other while covering both sides of the driving circuit board.

The support sheet may be enclosed and sealed by a sealing tape having acid resistance, and the sealing tape may be attached in the form of a tile in which the upper and lower ends of the support sheet are partially overlapped on the outer surface of the support sheet to prevent penetration of the etching solution.

And removing the seal member previously installed on the display panel prior to the first application of the sealant.

And removing the polarizing film attached to the display panel prior to the first application of the sealant.

An acid-resistant protection for protecting the drive circuit substrate from the etchant between performing the sealing and the first etching step, or between performing the first etching step and performing the masking with the masking member, And attaching the driver circuit board with the sheet by wrapping the driver circuit board with the sheet.

Wherein the protective sheet is wrapped around the driving circuit substrate at one edge of the display panel and is attached to the other edge of the display panel, Can be protected.

In the step of attaching the protective sheet to the display panel, the protective sheet is attached to both sides of the edge of the display panel so that the driving circuit substrate is protected from the etching liquid in such a manner that both surfaces of the driving circuit substrate are covered with each other. can do.

The protective sheet may be enclosed and sealed by a sealing tape having an acid resistance, and the sealing tape may be attached in the form of a tile in which the upper and lower ends are partially stacked on the outer surface of the protective sheet to prevent penetration of the etching liquid.

The sealing tape may be a masking tape for performing masking in the step of performing the masking.

A step of sealing the side surface of the display panel with an acid resistant sealant between the step of performing sealing and the step of primary etching or between the step of primary etching and the step of secondary etching, .

A step of wrapping the drive circuit board with the protective sheet between the step of performing the sealing and the step of performing the first etching or the step of sealing the side surface of the display panel with the sealant having acid resistance is performed , The step of removing the protective sheet or the sealant may include removing the protective sheet or the sealant after the first etching step.

The masking may be attached to both side edges of the display panel such that the protrusions are formed at edges of the display panel to which the tabs are attached, respectively.

According to the present invention, the sealant is applied to the display panel a plurality of times to prevent the display panel from being damaged by the etching solution when the etching liquid flows into the display panel.

Also, the large-sized curved display device can be easily manufactured by etching the large-size display panel to a uniform thickness by performing the second order etching after the first-time etching.

Further, by protecting the driving circuit substrate with the protective sheet or the supporting sheet, it is possible to solve the problem of detaching the driving circuit substrate at the time of etching.

In addition, by adhering the adhesive tape in the form of a tile, it is possible to originally prevent the etching solution from flowing into the driving circuit substrate.

1 is a side sectional view showing a display panel before etching by an etching method using a sealing method of a display panel according to an embodiment of the present invention.
2 is a flowchart schematically illustrating a sealing method of a display panel according to an embodiment of the present invention.
3 is a schematic view illustrating a sealing method of a display panel according to an embodiment of the present invention.
FIG. 4 is an enlarged view of a portion of a display panel sealed by a sealing method of a display panel according to an embodiment of the present invention, to which a driving circuit substrate is attached, and is a side sectional view showing a state in which a driving circuit substrate is surrounded by a supporting sheet .
5 is a flowchart schematically illustrating a method of etching a display panel using a sealing method of a display panel according to an embodiment of the present invention.
FIG. 6 is a side cross-sectional view illustrating a display panel sealed by a sealing process in a method of etching a display panel using a sealing method of a display panel according to an embodiment of the present invention.
FIG. 7 is a side cross-sectional view illustrating a display panel with a protective sheet attached at a step of attaching a protective sheet among methods of etching a display panel using a sealing method of a display panel according to an embodiment of the present invention.
8 is a front view showing a display panel on which a sealant is applied in a step of applying a sealant around a side surface of a display panel using a sealing method of a display panel according to an embodiment of the present invention.
9 is a side cross-sectional view illustrating a display panel etched in a first etching step of a method of etching a display panel using a sealing method of a display panel according to an embodiment of the present invention.
10 is a side cross-sectional view illustrating a display panel etched in a second etching step of a method of etching a display panel using a sealing method of a display panel according to an embodiment of the present invention.
11 is a side cross-sectional view illustrating a display panel etched by a method of etching a display panel using a sealing method of a display panel according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

The method of etching a display panel according to the present invention may include an etching method in which the thickness of the display panel 100 is reduced so that the curved display panel 100 can be easily manufactured by manufacturing the prefabricated display panel 100 .

1, a display panel 100 includes a first substrate 110 and a second substrate 120, a liquid crystal layer (not shown) disposed between the first substrate 110 and the second substrate 120, 130 may be an LCD panel including a first substrate 110 and a second substrate 120. In the case where one of the first substrate 110 and the second substrate 120 is a color filter substrate and the other is a thin film transistor substrate, And may be the polymer liquid crystal layer 130.

A seal member 140 sealing the liquid crystal layer 130 may be provided around the liquid crystal layer 130.

The display panel 100 may include a driving circuit substrate 150 for driving the display panel 100. The driving circuit substrate 150 may include various semiconductor and electric devices mounted thereon, May include a tab 155 electrically connecting the driving circuit substrate 150 to the display panel 100. [

A sealing method S10 of a display panel for etching a display panel according to an embodiment of the present invention may first include removing a polarizing film attached to the display panel 100. [

The step of removing the polarizing film (not shown) may include a step of attaching the display panel 100 to the display panel 100 so that the etchant can be directly contacted to the display panel 100 and etched so as to reduce the thickness of both sides of the display panel 100 The polarizing film can be removed.

At this time, the polarizing film removed from the display panel 100 may be stored for later reuse, and the step of removing the polarizing film is performed first in the sealing method S10 of the display panel for etching the display panel But may be performed after the sealing method S10 has been completed, or may be performed in any order during the process.

2 and 3, a sealing method S10 of a display panel for etching a display panel according to an embodiment of the present invention is a processing step before etching the display panel 100, (S11) of removing the seal member (140) previously attached to the panel (100).

The step S11 of removing the seal member 140 is a step of removing the seal member 140 previously attached to protect the liquid crystal layer 130 when the display panel 100 is manufactured, It is possible to remove only the seal member 140 at the portion where the tab 155 electrically connecting the drive circuit board 150 to the display panel 100 is attached.

Since the seal member 140 previously attached to the display panel 100 does not have acid resistance, the etchant can penetrate into the display panel 100 due to corrosion at the time of etching. Therefore, sealants 141 and 142 ). ≪ / RTI >

A sealing method S10 of a display panel for etching a display panel according to an embodiment of the present invention may include attaching a support sheet 160 (S13).

The support sheet 160 can support the sealants 141 and 142 when the following sealants 141 and 142 are applied to the display panel 100.

For example, the tabs 155 may be formed on one of the first substrate 110 and the second substrate 120 of the display panel 100 to have a longer length, and may be formed on the upper surface of the longer- There is no problem when the sealants 141 and 142 are applied to the protruded upper surface.

However, when the sealants 141 and 142 are applied to the back surface, the sealants 141 and 142 can not support the shapes of the sealants 141 and 142 until the sealants 141 and 142 are hardened. It is possible to attach the support sheet 160 protruding longer than the long protruding substrate and to support the sealants 141 and 142 in such a manner that the sealants 141 and 142 are applied to the surface of the protruding support sheet 160.

On the other hand, the support sheet 160 may be formed of an acid-resistant film having an acid resistance and an adhesive strength, and may be attached along the edge to a portion of the display panel 100 to which the tab 155 is attached.

4 (b), the supporting sheet 160 may be attached to the upper surface of the tab 155, for example, by passing the driving circuit board 150, The sealant 141 and 142 are coated on the upper surface of the coated sealants 141 and 142 and the drive circuit board 150 is wrapped in a manner that both ends of the sealant 141 and 142 are bonded to the upper surface of the coated sealants 141 and 142, The driving circuit substrate 150 can be protected from the driving circuit substrate 150. [

4A, the support sheet 160 may be formed to have a length covering the drive circuit board 150 from the tab 155, so that the two sheets of support sheet 160 are separated from the tab 155, The driving circuit substrate 150 may be wrapped around the driving circuit substrate 150 in such a manner that the driving circuit substrate 150 is protected from the etching liquid.

Here, the support sheet 160 may be bonded to the support sheet 160 through a driving circuit board 150 with the adhesive layer interposed therebetween, The open peripheries can be sealed in the form of attaching a sealing tape 190 having an acid resistance.

At this time, both surfaces of the display panel 100 are etched in such a manner that the etching solution is flowed from the upper part to the lower part by being coupled to the etching device so that the part of the driving circuit substrate 150 is positioned at the upper part when the display panel 100 is etched.

4, when the support sheet 160 is attached to the sealing tape 190, the support sheet 160 is protected and the etchant is supplied between the support sheet 160 and the sealing tape 190 The upper and lower ends may be partially overlapped with each other so that the upper and lower ends are laminated such that the tiles are stacked so that the upper and lower ends can easily flow from the upper portion to the lower portion without being infiltrated.

For example, the sealing tape 190 may be attached to the upper portion of the sealing tape 190, which is attached first, in a lengthwise direction from the lower end of the supporting sheet 160 so that the lower end of the next sealing tape 190 is partially overlapped The support sheet 160 can be covered with the sealing tape 190 at both ends and upper ends of the sealing tape 190 to be completely sealed.

At this time, the sealing tape 190 is attached to the supporting sheet 160 in a spiral form from the lower end to the upper end of the supporting sheet 160 in the lateral direction, It is possible.

The sealing tape 190 for finishing the support sheet 160 may be formed from a portion to perform masking so as to perform the function of the masking member 180 performing the masking to form the protrusion 111 during etching, Or may be attached to the upper end of the support sheet 160.

As shown in FIGS. 2 and 3, a sealing method S10 of a display panel for etching a display panel according to an embodiment of the present invention may include a step S15 of applying a sealant first.

The step S15 of applying the sealant to the sealant 141 may be a step of applying the sealant 141 to seal the gap between the tab 155 and the first substrate 110 and the second substrate 120 have.

On the other hand, the sealant 141 coated on the first surface of the first substrate 110, the second substrate 120, and the tabs 155 is sealed on the upper surface of the support sheet 160, And may be applied to the support sheet 160 for application between the tabs 155 in the opposite direction and the first substrate 110 or the second substrate 120.

That is, in the step S15 of applying the sealant to the sealant 141, the sealant 141 removes the seal member 140, which has been removed in the step S11 of removing the seal member previously attached to the display panel 100, The sealant 141 can be applied so as to be airtight.

At this time, the sealant 141 is coated on one side of the display panel 100 where the tabs 155 are attached and cured, and then the display panel 100 is turned upside down to coat the other side of the tabs 155, Or the like.

On the other hand, the sealant 141 applied firstly may have a viscosity such that bubbles mixed in the sealant 141 can easily escape when the sealant 141 is applied.

Here, the sealant 141 may be a material having high tolerance to hydrofluoric acid and high adhesion to glass, and may be natural or resin that is cured by heating or UV.

A sealing method S10 of a display panel for etching a display panel according to an embodiment of the present invention may include a step S17 of applying a sealant secondarily.

In the step S17 of applying the sealant secondarily, the sealant 142 may be applied so as to overlap the upper portion of the sealant 141 applied in the step S15 of applying the sealant first.

On the other hand, the sealant 142 applied in the step S17 of applying the sealant to the sealant may be a sealant of the same material as the sealant 141 applied in the step S15 of applying the sealant to the sealant, The sealant 141 may have a different viscosity.

For example, if the sealant 141 to be coated first has a viscosity of 500 cPs, the sealant 142 to be applied secondarily may have a viscosity higher than the viscosity of the sealant 141 to be coated first with a viscosity of 1000 cPs.

In the embodiment, the sealant 141 having the viscosity higher than the viscosity of the sealant 142 to which the viscosity of the sealant 141 to be applied secondarily is first applied is applied so that the bubbles contained in the sealant 141, And the sealant 142 having a high viscosity is coated on the sealant 142 in a second order so that the sealant 141 is sealed first.

Here, in the embodiment, the viscosity of the sealant 141 applied secondarily is higher than the viscosity of the sealant 142 coated first. However, the sealant 141 coated with the viscosity of the sealant 141 applied first And may have a viscosity higher than the viscosity (142).

The second sealant 142 may be applied so as to have the same height as the height of the surface of the display panel 100 before etching and may be applied to the surface of the display panel 100 in the same manner as the sealant 141 coated first. And may be applied between the first substrate 110 and the second substrate 120 that are in contact with the tabs 155 on both sides.

If the sealant 142 applied secondarily is applied lower than the height of the surface of the display panel 100, there is a possibility that the etching liquid may flow into the space between the upper portion of the display panel 100 and the sealant 142, When the upper surface of the panel 100 is coated with the etchant, the etchant flowing down from the upper part to the lower part may not touch the display panel 100, resulting in the occurrence of a glazed part.

When the sealant 142 is applied to the second sealant 142, the first surface of the display panel 100 is coated with one side of the tab 155 and cured, and then the display panel 100 ) Is turned over and the other surface of the portion to which the tab 155 is attached is coated and cured.

As described above, the sealing method S10 of the display panel for etching the display panel according to the embodiment of the present invention is a method in which the sealant 141 and the sealant 142 are applied to the display panel 100 a plurality of times, It is possible to prevent the display panel 100 from being damaged by the etching liquid.

6 to 9, a method of etching a display panel using a sealing method S10 of a display panel according to an embodiment of the present invention will be described.

7, a method of etching a display panel using a sealing method S10 of a display panel according to an embodiment of the present invention may include attaching a protective sheet 170 (S20).

6, the step S20 of attaching the protective sheet 170 is performed in order to protect the driving circuit board 150 from the display panel 100, which has been sealed by the sealing method S10 described above, The display panel 100 may be attached to the protective sheet 170. [

Here, the step S20 of attaching the protective sheet 170 may include attaching the supporting sheet 160 of the sealing method S10 of the display panel 100 to the driving circuit board 150 In the present embodiment).

Conversely, step S20 of attaching the protective sheet 170 may be omitted if the support sheet 160 is configured to wrap the drive circuit board 150. [

The step S20 of attaching the protective sheet 170 is performed by applying the sealing method S10 described above on both sides of the display panel 100 so as to enclose the driving circuit substrate 150 to form the cured sealants 141 and 142 Lt; / RTI >

7A, the protective sheet 170 is formed to have a length enough to cover the drive circuit board 150 at the portions where the sealants 141 and 142 of the display panel 100 are applied, So that the driving circuit substrate 150 is covered on both sides of the display panel 100 and the driving circuit substrate 150 is protected from the etchant in a manner of joining the two.

7 (b), the protective sheet 170 may be provided on one side of the display panel 100 on the other side of the display panel 100 coated with the sealants 141 and 142, The driving circuit board 150 is wrapped around the driving circuit board 150 on one side of the display panel 100 and attached to the other side of the display panel 100 It is possible to combine the open portions to protect the driving circuit substrate 150 from the etchant.

Here, the protective sheet 170 may be configured to be coupled to each other including the adhesive layer, or may be completely sealed with the sealing tape 190 having an acid resistance to protect the driving circuit board 150.

In this case, when the protective sheet 170 is coupled to the sealing sheet 190 by the sealing tape 190, the protective sheet 170 is formed in a tile-like shape in the same manner as the method of joining the supporting sheet 160 with the sealing tape 190 (See FIG. 7) in such a manner as to close the open portion of the protective sheet 170 in the form of attaching and sealing the sealing tape 190.

The sealing tape 190 may also function as a masking member 180 as will be described below and may be used to mask the sealing tape 190 when the sealing tape 190 is configured to perform the function of the masking member 180. [ The protective sheet 170 may be completely sealed and adhered to the upper end of the protective sheet 170. [

8, a method of etching a display panel using a sealing method (S10) of a display panel according to an embodiment of the present invention includes a step of sealing a side surface of a display panel 100 with a sealant 143 S30).

In the step S30 of sealing the side surface of the display panel 100 with the sealant 143, the sealing member 140 previously attached to the display panel 100 is corroded by the etching liquid to damage the display panel 100 It may be a step for protecting the display panel 100 by applying a sealant 143 having an acid resistance around the side to which the seal member 140 of the display panel 100 is attached.

On the other hand, the sealant 143 may be a natural, heat, or UV curable resin, similar to the sealants 141 and 142 applied in the sealing method S10.

The edge of the display panel 100 to which the sealant 143 is applied is attached to the edge of the display panel 100 on which the driving circuit substrate 150 is attached by the sealing method S10 and the protective sheet 170, And may be the side surface of the display panel 100 except for this portion because it is airtight by the seat 160.

As shown in FIG. 9, a method of etching a display panel using a sealing method S10 of a display panel according to an embodiment of the present invention may include a step S40 of etching the primary panel.

In this primary etching step S40, both surfaces of the display panel 100 are etched to etch the display panel 100 to a predetermined thickness T1 such that the thickness T1 becomes thinner than the initial thickness T0 have.

Here, as the size of the display panel 100 increases, the thickness T0 of the display panel 100 increases as a whole in order to increase rigidity.

If the display panel 100 having a relatively large thickness T0 is etched at once, the thickness may be unevenly etched. Accordingly, when the display panel 100 is etched several times as in the present invention, unevenness of the etching can be eliminated.

The first etching step S40 is performed in such a manner that the driving circuit substrate 150 of the display panel 100 is positioned at the upper position and is fixed on the etching apparatus. The etching can be performed in such a manner that the etching is performed.

Although it is described in the embodiment that the step of performing the masking to be performed immediately below the step S40 is performed after the step of performing the primary etching step S40, The sealant 143 applied in the step S30 of applying the sealant 143 to the periphery of the protective sheet 170 and the display panel 100 attached in the step S20 of attaching the sealant 143 is etched by the etchant It may further include a step of removing both of the protective sheet 170 and the sealant 143 in order to newly install the protective sheet 170 and the sealant 143 because there is a risk of corrosion or breakage.

If both of them are removed, step S20 of attaching the protective sheet 170 again and step S30 of applying the sealant 143 around the side surface are performed again before the masking step S50 A protective sheet 170 and a sealant 143 can be newly installed on the display panel.

10, a method of etching a display panel using a sealing method S10 of a display panel according to an embodiment of the present invention may include performing (S50) masking with a masking member 180 .

The step S50 of performing masking with the masking member 180 may be performed in the same manner as that of the display panel 100 in which the protrusion 111 is formed to form the protruding portion 111, Masking can be performed on the portion.

Here, when the display panel 100 is etched, the rigidity of the display panel 100 is weakened, so that the display panel 100 may be damaged when the display panel 100 is waved. In order to prevent this, it is possible to form the protruding portion 111 which is gentle when the display panel 100 is etched.

The masking member 180 may be formed of a sealing tape 190 having an acid resistance and the masking member 180 may be formed on the portion of the display panel 100 where the protrusion 111 is to be formed, It may be attached to both sides of the edge where the tab 155 is attached and the opposite direction.

The masking member 180 is attached to form the protrusion 111 at the edge of the display panel 100 where the tab 155 is attached and in the opposite direction to the edge of the display panel 100. However, And may be attached so as to form a protrusion 111 on the entire circumference except for both edges or one edge of the panel 100.

The step S50 of masking the masking member 180 may further include the step of removing the protective sheet 170 and removing the protective sheet 170 to reattach the new protective sheet 170 after the first etching step S40 The sealing tape 190 adhered to the protective sheet 170 to perform the masking function of the masking member 180 is removed from the portion to be masked to the protective sheet 170 170 may also be masked in a manner of attaching the sealing tape 190 (S50).

As shown in FIG. 10, a method of etching a display panel using a sealing method (S10) of a display panel according to an embodiment of the present invention may include a step S60 of secondary etching.

The second etching step S60 is performed such that the thickness T2 of the second display panel 100 is thinner than the thickness T1 of the first etching step S40 except for the portion where the masking is performed. The display panel 100 can be etched to a predetermined thickness T2.

In the second etching step S60, as in the first etching step S40, the driving circuit substrate 150 is brought into the etching apparatus so that the driving circuit substrate 150 is positioned at the upper position in the state where the display panel 100 is standing, 100). ≪ / RTI >

In addition, the display panel 100 having undergone the second-order etching step S60 has a curved surface shape in which the protective sheet 170 and the masking member 180 are removed and the display panel 100 is bent and fixed in a desired curved shape, A display device can be manufactured.

At this time, the polarizing film may be attached after the display panel 100 is bent, or may be attached after attaching the polarizing film.

After the second etching step, only the masking member 180 and the protective sheet 170 are removed, and the sealant 143 coated on the side surface of the display panel 100 is selectively removed or not removed .

The method of etching the display panel 100 using the sealing method S10 of the display panel according to the embodiment of the present invention will be summarized. First, the polarizing film attached to the display panel 100 is removed.

And. The seal member 140 previously installed on the tab 155 of the display panel 100 is removed S11 and the support sheet 140 is removed to apply the sealants 141 and 142 to the portion where the seal member 140 is removed (S13), and the sealants 141 and 142 are applied (S15 and S17) to prevent penetration of the etching solution into the portion where the seal member 140 is removed.

The sealants 141 and 142 are formed by applying a sealant 141 to a portion where the tab 155 is attached to one side of the display panel 100 and curing the sealant 141 and then turning the display panel 100 upside down, The sealant 141 is first applied (S15) in such a manner that the sealant 141 is applied and cured to the portion to which the sealant 141 is attached.

 Then, the sealant 142 is applied (S17) to the sealant 142 primarily by the method S15 of applying the sealant 141 primarily to the sealant 142. At this time, the sealant 142 applied at the second time is coated with the sealant 142 The viscosity may be different from the viscosity of the polymer.

When the support sheet 160 is configured to wrap the drive circuit board 150, the sealant 141 or 142 is coated and then the support sheet 160 is attached so as to surround the drive circuit board 150, Thereby protecting the driving circuit substrate 150 (see FIG. 4).

When the support sheet 160 is not configured to surround the drive circuit board 150, the protective sheet 170 is attached to the display panel 100 to cover the drive circuit board 150 (S20) The sealing process S30 is performed on the side surface of the display panel 100 with the sealant 143 to prevent breakage of the seal member 140 installed on the side surface of the panel 100 (see FIGS. 7 and 8) .

Then, the display panel 100, on which the side surfaces of the driving circuit substrate 150 and the display panel 100 are sealed, is subjected to the first-order etching (S40) with the entire thickness being reduced by the etching solution as described above.

When the first etching is completed, masking is performed in order to form the protruding portion 111 protruding at the second etching (S50).

Here, before the masking is performed, the sealant 143 or the protective sheet 170 is removed according to the state of the sealed sealant 143 and the protective sheet 170 around the side of the display subjected to the first etching, (S20, S30).

The masking may be performed by attaching a masking member 180 to a portion where the protrusion 111 is to be formed (S50). After the display panel 100 is firstly etched, the protective sheet 170 is removed A sealing tape 190 that engages the protective sheet 170 may be attached to perform the function of the masking member 180 to finish the protective sheet 170 and perform masking at the same time.

Then, the mask 100 is subjected to a second-order etching (S60) so that the entire thickness of the mask 100 is reduced except for the portion where the masking is performed.

When the second etching is completed, the curved display device is manufactured in such a manner that the protective sheet 170 is removed, the polarizing film is attached, and the display panel 100 is bent and fixed to a curved surface in a desired shape.

Therefore, the method of etching the display panel 100 using the sealing method S10 of the display panel according to the embodiment of the present invention can improve the airtightness of the display panel 100 by applying the sealants 141 and 142 a plurality of times, Damage can be minimized.

In addition, the driving circuit substrate 150 is protected by the support sheet 160 or the protective sheet 170, thereby minimizing the inconvenience of attaching and detaching the driving circuit substrate 150 during etching.

In addition, etching can be performed a plurality of times to obtain a uniform etched surface, and the large display panel 100 can be etched with a uniform thickness, thereby making it possible to easily manufacture a large curved display device.

While the present invention has been particularly shown and described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, And all changes and modifications to the scope of the invention.

100: display panel 110: first substrate
111: protrusion 120: second substrate
130: liquid crystal layer 140: seal member
141, 142, 143: sealant 150:
155: tab 160: support sheet
170: protective sheet 180: masking member
190: Sealing Tape

Claims (26)

A sealing method of a display panel performed before etching a display panel,
A first step of applying a sealant having an acid resistance to a portion of the display panel to which a tab electrically connecting the display panel to the driving circuit substrate is attached,
Applying a second sealant to the top of the applied sealant in the first application of the sealant,
And removing the seal member previously installed on the display panel prior to the first application of the sealant. ≪ RTI ID = 0.0 > 15. < / RTI > The method according to claim 1,
Wherein the sealant applied at the second coating step of the sealant has a viscosity different from that of the sealant applied at the first coating step of the sealant. The method according to claim 1,
Wherein the sealant is applied to both edges of the tab-attached portion of the display panel. The method according to claim 1,
Prior to the first application of the sealant
And attaching a supporting sheet for supporting the sealant at the edge of the display panel to the display panel. 5. The method of claim 4,
In attaching the support sheet to the display panel
Wherein the supporting sheet protects the driving circuit substrate from the etching liquid in such a manner that the driving circuit substrate is wrapped around the one side edge of the display panel and attached to the other side edge of the display panel. Lt; / RTI > 5. The method of claim 4,
In attaching the support sheet to the display panel
Wherein the support sheet is attached to both sides of the edge of the display panel and protects the drive circuit board from the etching solution in such a manner that the support sheet covers the both sides of the drive circuit board, How to seal the panel. The method according to claim 5 or 6,
Wherein the support sheet is enclosed and sealed by a sealing tape having an acid resistance and the sealing tape is attached in the form of a tile in which upper and lower ends are partially stacked on the outer surface of the support sheet to prevent penetration of the etching solution. A method of sealing a display panel for etching a panel. delete The method according to claim 1,
Prior to the first application of the sealant
And removing the polarizing film attached to the display panel. A first step of applying a sealant having an acid resistance to a portion of the display panel to which a tab electrically connecting the display panel to the driving circuit substrate is attached, and a second step of applying a sealant on the upper portion of the sealant, A second sealing step of sealing the display panel,
A step of performing a first etching so that both surfaces of the display panel sealed in the step of sealing are reduced in thickness as a whole,
Performing masking with a masking member so as to form a protruding portion that protrudes to some extent on the display panel in which the thickness of both surfaces is etched in the primary etching step; and
Etching the masked display panel to reduce the thickness of the remaining portion except for the masked portion,
And removing the seal member previously installed on the display panel prior to the first application of the sealant. ≪ RTI ID = 0.0 > 8. < / RTI > 11. The method of claim 10,
Wherein the sealant applied at the second coating step of the sealant has a viscosity different from a viscosity of the sealant applied at the first coating step of the sealant. . 11. The method of claim 10,
Wherein the sealant is applied to both edges of the tab-attached portion of the display panel. 11. The method of claim 10,
Prior to the first application of the sealant
And attaching a supporting sheet for supporting the sealant at an edge of the display panel to the display panel. 14. The method of claim 13,
In attaching the support sheet to the display panel
Wherein the supporting sheet protects the driving circuit substrate from the etchant by wrapping the driving circuit substrate on one edge of the display panel and attaching to the other edge of the display panel. Method of etching the panel. 14. The method of claim 13,
In attaching the support sheet to the display panel
Wherein the driving circuit substrate is attached to both sides of the edge of the display panel so that the driving circuit substrate is protected from the etching liquid by being coupled with each other while covering both sides of the driving circuit substrate. A method of etching a display panel using the method. 16. The method according to claim 14 or 15,
Wherein the support sheet is enclosed and sealed by a sealing tape having an acid resistance and the sealing tape is attached in the form of a tile in which upper and lower ends are partially stacked on the outer surface of the support sheet to prevent penetration of the etching solution. Method of etching a display panel using a panel sealing method. delete 11. The method of claim 10,
Prior to the first application of the sealant
And removing the polarizing film attached to the display panel. A method of etching a display panel using the sealing method of a display panel. 11. The method of claim 10,
Between the step of performing the sealing and the step of primary etching, or the step of performing the primary etching and the step of performing masking with the masking member
And a step of wrapping and attaching the driving circuit substrate with a protective sheet having an acid resistance to protect the driving circuit substrate from the etching liquid. 20. The method of claim 19,
The step of wrapping and attaching the driving circuit substrate to the protective sheet
Wherein the protective sheet protects the driving circuit substrate from the etchant by adhering the driving circuit substrate on one edge of the display panel and attaching to the other edge of the display panel. Method of etching the panel. 20. The method of claim 19,
In attaching the protective sheet to the display panel
Wherein the protective sheet is attached to both sides of the edge of the display panel and protects the driving circuit substrate from the etching solution in a state that the driving circuit substrate is covered with both sides of the driving circuit substrate. Method of etching a display panel. 22. The method according to claim 20 or 21,
Characterized in that the protective sheet is wrapped and sealed by a sealing tape having an acid resistance and the sealing tape is attached in the form of a tile in which upper and lower ends are partially stacked on the outer surface of the protective sheet to prevent penetration of the etching liquid. Method of etching a display panel using a panel sealing method. 23. The method of claim 22,
Wherein the sealing tape is a masking tape for performing masking in the step of performing the masking. 11. The method of claim 10,
Between the performing of the sealing and the primary etching, or between the primary etching and the secondary etching,
And sealing the side surface of the display panel with a sealant having an acid resistance. 20. The method of claim 19,
After the primary etching step,
And removing the protective sheet. A method of etching a display panel using a sealing method of a display panel. 20. The method of claim 19,
The step of performing the masking
Wherein the protrusions are attached to edges of both ends of the display panel so that the protrusions are formed at edges of the display panel with the tabs opposite to the edges of the display panel with the tabs attached thereto.

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