KR100830560B1 - Manufacturing method of window for display device, window for display device and wireless terminal unit comprising the same - Google Patents

Abstract

A method for manufacturing a safety window for a display device is provided to facilitate removing air bubbles in sticking a plastic board to window using UV-adhesive and to allow mass production in a short time. A method for manufacturing a safety window for a display device includes the steps of: applying UV-adhesive to window; placing a plastic board on the UV-adhesive applied window; removing gas by pressing the plastic board gradually from starting end to finishing end during being passed through a roll press; curing the UV-adhesive by emitting UV. The manufactured safety window for a display device comprises: window(30); UV-adhesive applied on the window(20): a plastic board(10) attached to the window by UV-adhesive; and a decoration layer(11).

Description

Manufacturing method of window for display device, display device window and portable wireless terminal having same {Manufacturing Method of Window For Display Device, Window For Display Device and Wireless Terminal Unit Comprising The Same}

The present invention relates to a window manufacturing method of a display device, a display device window, and a portable wireless terminal having the same.

Display devices such as liquid crystals and OLEDs exist in portable wireless terminals and the like, and windows are employed to protect them. Conventional windows are mainly made of acrylic resins, synthetic resin substrates such as polycarbonate (PC) or polyethylene terephthalate (PET), and the thickness of the windows according to the trend of miniaturization and slimming of portable devices. It is also getting slimmer.

However, in the case of slimming the synthetic resin substrate, there is a problem in that the strength of the synthetic resin substrate is insufficient to sufficiently protect the display device from external impact. In addition, the surface hardness is also low, there is a problem that is not free to scratch.

In order to solve this problem, it has been attempted to employ glass such as tempered glass as a window instead of a synthetic resin substrate. However, when the glass is used as a window, when the glass is subjected to an impact greater than the limit shock, the glass is scattered and causes a fatal damage to the display device.

In order to solve this problem, it has been attempted to apply the anti-scatter coating to prevent the scattering or to attach the anti-scattering film to the front or the back with a double-sided tape or a general adhesive, adhesive, or the like.

However, the above window also has the following problems.

First of all, according to the recent trend, the window is also required to be decorated in various ways. However, the direct decoration on glass is considerably more difficult than the decoration on a general synthetic resin substrate, and there are various limitations.

Second, when a general adhesive such as double-sided tape or instant adhesive is used as a method of adhering the anti-scattering film and glass, air bubbles generated in the bonding process are not removed, resulting in light refraction, diffraction, etc., resulting in image instability and air There is a problem that the quality of the window is significantly reduced because the bubble is exposed.

In order to solve the above problem,

The present inventors have studied the bonding of a decorated synthetic resin substrate and glass with a UV-adhesive. However, even when the synthetic resin substrate and the glass is bonded with a UV-adhesive, there is a problem in that air bubbles are not sufficiently removed and there is no practical use.

In order to solve this problem, after trying hard to remove the air by decompression using a decompression device and tried to remove the air bubble by pressing and bonding method, a satisfactory result was obtained.

However, there is a concern that additional air bubbles may be generated during curing by UV irradiation, and thus, the pressure-sensitive adhesive process is not mass-producible and thus uncompetitive in terms of unit cost of the window.

That is, in order to perform the pressure-sensitive adhesive process, the process of putting the glass, the resin substrate, and the UV adhesive into a closed space (for example, a vacuum chamber) in a vacuum or semi-vacuum state and removing the window after adhesion is not simple in an automated process. The manufacturing process takes too long, and the space in the vacuum chamber is limited, so that a large amount of windows can not be manufactured at a time, and the manufacturing cost increases.

The present invention is to solve the above problems,

It is easy to apply the decoration to the window, and in the process of UV-gluing the resin substrate and glass through a specific method, the air bubble is simply removed and mass production is possible in a short time. The purpose.

The present invention for achieving the above object,

Applying a UV-adhesive to the glass; Placing a synthetic resin substrate on the glass to which the UV-adhesive is applied; Passing through the roll-press gradually compressing the synthetic resin substrate from the beginning to the end to remove the gas; And irradiating UV to cure the UV-adhesive.

In addition, the front or back surface of the synthetic resin substrate provides a method for manufacturing a window of the display device, characterized in that the decoration by at least one method of the deposition method and the printing method.

In addition, the step of applying the UV-adhesive to the glass provides a method for manufacturing a window of the display device, characterized in that the dispersion coating is applied to a part of the region of the bonding surface of the glass bonded to the synthetic resin substrate with a dispersing applicator.

In addition, the present invention provides a method of manufacturing a window of a display device, characterized in that the UV-adhesive is less dispersed and distributed from the start region to the end region of the synthetic resin substrate.

In addition, the synthetic resin substrate is formed by cutting all or part of the edges of the surface and the side that is bonded to the glass is cut off, there is a gas removal promoting unit for promoting the removal of the gas during the adhesion method of the display device to provide.

In addition, the gas removal promoting unit provides a window manufacturing method of the display device, characterized in that the corner is formed by cutting a straight line or curve.

In addition, the gas removal promoting unit is provided on the end of the synthetic resin substrate, or is provided on the end and both ends of the window manufacturing method of the display device.

In addition, the gas removal promoting unit provides a method for manufacturing a window of the display device, characterized in that the cutting is formed within the following numerical range.

Length (A) cut from the adhesive surface with glass of synthetic resin substrate = 0.05 ~ 0.85mm

Length cut from side of plastic substrate (B) = 0.05 ~ 0.4mm

In addition, the glass is moved by the moving means to provide a window manufacturing method of the display device, characterized in that each step is performed by an automated process.

In addition, the present invention provides a method for manufacturing a window of a display device, wherein a plurality of windows are manufactured at the same time by mounting a plurality of glasses on an assembly jig moved by a moving means.

In addition, the glass is a size that can be placed within the range of 3 to 100 window-shaped synthetic resin substrate, and provides a window manufacturing method of the display device, characterized in that cut separately after the curing process of the UV-adhesive. .

Further, the present invention provides a method for manufacturing a window of a display device, wherein the time required for manufacturing one window is within 30 seconds.

In addition, a window of a display device manufactured by the manufacturing method is provided.

The present invention also provides a portable wireless terminal having a window of the display device.

According to the present invention, it is easy to decorate the window, and the air bubble is simply removed in the process of UV-gluing the resin substrate and the glass through a specific method, so that mass production can be performed in a short time. to provide.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

Window manufacturing method of the display device according to the present invention,

Applying a UV-adhesive to the glass 30, placing the synthetic resin substrate 10 on the glass to which the UV-adhesive 20 is applied, and passing the roll-press 50 to the synthetic resin substrate 10 To gradually remove the gas by pressing from the end to the end, and characterized in that it comprises a step of irradiating UV to cure the UV-adhesive.

In the method of manufacturing a window of the display device according to the present invention, when the adhesive is bonded with a synthetic resin substrate and a UV-adhesive, it is compressed. For a long time, the adhesion process has been studied and several attempts have been made, but air bubbles have not been satisfactorily removed.

In the meantime, in the process of pressing, instead of pressing at the same time, instead of pressing gradually, it was found that the gas is effectively released and removed in the pressing direction and side as the pressing is performed.

In addition, even in the method of applying the UV-adhesive, if the dispersion coating is applied to a part of the adhesive region with the dispersing applicator, the air bubbles are more effectively removed and the problem of the UV-adhesive coming out during the pressing process can be eliminated.

In particular, reducing the application amount of the UV-adhesive along the pressing progress direction reduces the problem of more effectively removing the air bubble and counting the UV-adhesive.

In addition, by cutting all or a portion of the edge and the side of the side that is bonded to the glass on the synthetic resin substrate to form a gas removal promoting part after pressing and bonding to remove the air bubbles more satisfactorily through the gas removal promotion part. Found. Thereby, even if it did not adhere | attach by the method of pressure reduction crimping, air bubble was removed and the mass productivity increased very much.

1 is a diagram illustrating a procedure of a method of manufacturing a window of a display device according to an exemplary embodiment of the present invention.

2A and 2B are a cross-sectional view and a plan view showing an example of a window of a display device manufactured by the above manufacturing method. As shown, the decoration layer 11 is formed and formed of a synthetic resin substrate 10, UV-adhesive 20, glass 30, etc., which are not limited but not decorated in the image display area 1. It is good.

Hereinafter, a method of manufacturing a window of a display device according to an embodiment of the present invention will be described in detail.

First, the UV-adhesive 20 is applied to the glass 30.

The glass may be employed without limitation, the glass known in the art, but is not limited, but it is preferable to use a tempered glass, since the tempered glass can be easily purchased on the market, detailed description thereof will be omitted. Although the thickness is not limited, it is recommended to use 0.2 to 1.2 mm glass.

The UV-adhesive may be used without limitation UV-adhesives in the art, and acrylic or epoxy UV-adhesive may be used.

The method of applying the UV-adhesive to the glass is not limited and various application methods known in the art may be used. More preferably, it is good to disperse | distribute an adhesive agent to a part of the area | region joined with the said synthetic resin substrate among the bonding surfaces of glass with a dispersing applicator. The dispersion spreader is controlled by a control device to control the discharge position and the discharge amount of the adhesive. The discharge port of the dispersion applicator may be one, but it may be made of a plurality to save the dispersion coating time.

3 and 4 are diagrams showing an example of dispersion coating. Dispersion is carried out with the dispersing applicator but is not applied to the entire area, but is preferably applied to a partial area as shown in FIG. 3. More preferably, as shown in Figure 4 it is preferable that the coating amount of the adhesive decreases in the direction in which the pressing proceeds. That is, it is preferable to increase the discharge amount of the adhesive at the start end portion of the synthetic resin substrate to which the pressing is performed, and to reduce the discharge amount stepwise or gradually toward the end. This more effectively eliminates the problem of air bubble removal and UV-adhesive counting. Although not limited, it is preferable to adjust the discharge amount so that the thickness after UV-adhesion is in the range of 0.005 to 0.1 mm.

Next, the synthetic resin substrate 10 is placed on the glass to which the UV-adhesive is applied. It is not required to squeeze and match the adhesive area of the glass with the resin substrate. Although not shown, the starting end of the synthetic resin substrate may be in contact with the glass and the ends may be spaced apart from each other by a predetermined interval.

The synthetic resin substrate 10 is preferably decorated, it is preferable that the decoration layer 11 is formed on a portion of at least one of the upper and lower surfaces of the synthetic resin substrate. Although not limited, the image display area 1 of the window may not be decorated, and may be decorated transparently or semi-transparently so that the decoration is visible when the display device is turned off and the image is visible when it is turned on.

The decoration method is not limited, and may deposit metal or / and oxide, and may deposit and decorate a predetermined area of the resin substrate through conductive deposition, non-conductive deposition, and the like. It is also possible to colorize and decorate by printing. It can also decorate in parallel with vapor deposition and printing. Deposition and printing methods are already well known, and the devices used therein are also commercially available and readily available on the market, so a detailed description thereof may be readily performed by those skilled in the art.

The material of the synthetic resin substrate 10 is not limited, and examples thereof include PC (polycarbonate), PET (polyethylene terephthalate), acrylic resin, and the like, and PC is preferred because of its physical properties, light transmittance, and ease of decoration. .

The thickness of the synthetic resin substrate 10 is not limited, but slim to 0.05 ~ 0.5mm.

Next, the synthetic resin substrate 10 is gradually compressed from the end to the end by passing through the roll-press 50 to remove the gas.

5 is a schematic diagram of a pressing and degassing process using the roll-press 50. As shown, the glass 30 is positioned on the moving means 60 and is pressed into a roll-press after the above procedure. Since the roll-press 50 is gradually compressed from the beginning to the end of the resin substrate, the remaining gas is discharged and removed to the side or the end of the resin substrate, thereby eliminating the problem of air bubbles. The roll-press may be rolled with its own driving force, or may be rolled naturally as the vehicle moves in contact with the resin substrate. In the drawings, the roll is formed only in the upper portion, but is not limited thereto, and a roll is formed in the lower portion. When the roll press is used, pressing and gas removal may be performed while moving the moving means, and the next step may be performed. Thus, the process time may be shortened to a degree comparable to that of the conventional method. When pressing the roll-press, the pressure may vary depending on whether the glass is ordinary glass or tempered glass, and it is recommended that the pressure be obtained so as not to damage the glass or the resin substrate through repeated experiments. Since those skilled in the art will be able to sufficiently, a detailed description thereof will be omitted.

Next, UV is irradiated to cure the UV-adhesive to manufacture a display window. There is no restriction | limiting in the UV irradiation method, A conventional method can be used. There is a photoinitiator in the UV-adhesive, so the reaction proceeds and cures very quickly. UV irradiation time is not limited, but a very thin film is a few seconds ~ minutes is appropriate.

6 is another embodiment of the present invention, the glass 30 may be used that is significantly larger than the window shape. That is, it is preferable to use a size in which the window-shaped synthetic resin substrate 10 can be placed within the range of 3 to 100. After the synthetic resin substrate is placed on the glass by the number of windows, and after all the above-described steps, the curing of the UV-adhesive agent is completed, the individual pieces may be cut to produce windows in large quantities.

On the other hand, although not shown, as another embodiment, by mounting a plurality of glass of the window shape to the assembly jig moving by the moving means to perform the respective steps, so that a large number of windows to be manufactured at the same time to make the window in large quantities It can also manufacture. The number of glass that can be seated on the assembly jig is not limited but 2 to 20 are preferred.

FIG. 7 is a cross-sectional view of a window of a display device manufactured using the synthetic resin substrate 10 having the degassing accelerator 12 formed as an example of the synthetic resin substrate used in the present invention. As shown, all or a part of the edge where the side and the side to be bonded to the glass meet is cut to form a gas removal promoting part for promoting the gas removal during bonding. The gas removal promoting unit 12 may be formed by cutting the edges in a straight line, may be formed by cutting in a curved line, and is not limited.

The degassing promotion part 12 is formed on the synthetic resin substrate, and is formed by cutting all or part of an edge where the side and side that are bonded to the glass meet. The degassing accelerator may be cut in a straight line, may be cut in a curved line, but is not limited.

In addition, the gas removal promoting unit 12 is preferably formed on all of the outer circumference when the synthetic resin substrate 10 is viewed in plan view. However, the present invention is not limited thereto, and may be formed within a range of 1 to 4 directions in the east, west, north and south directions of the outer circumference. That is, it is preferable that it is formed in the outer periphery of the end of the synthetic resin substrate located in the advancing direction of the crimping direction in the bonding process, and on the other hand, it may be formed on both sides of the advancing direction. In order to simplify the process, it is not necessary to form the degassing accelerator in the direction opposite to the traveling direction, that is, the outer circumference of the start end.

8 is an enlarged partial view of the gas removal promoting unit 12. It may be straight or curved as shown. The size of the gas removal promotion unit 12 may be expressed as A (the length cut from the adhesive surface of the synthetic resin substrate with the glass, which is equal to or less) as shown, and B (the length cut from the side of the synthetic resin substrate, the same or less). Although it is not limited, A may be selected in the range of 0.05 ~ 0.85mm, B is 0.05 ~ 0.4mm. The thinner the thickness of the synthetic resin substrate, the smaller the value of B may be.

In the method of manufacturing a display device window according to the present invention, each of the steps may be controlled and programmed by the control device to perform the steps while moving by the moving means to automate the process.

As a result of the mass production test using the above-described methods by the process automation, the manufacturing time per display window can be produced on average within 30 seconds, especially within 5 seconds.

Although the window of the display device manufactured according to the present invention is not limited, the total thickness is preferably in the range of 0.4 to 2.0 mm. If it is less than the above range it is difficult to sufficiently protect the display device against external impact due to the weak strength, and if it is above the range it may not be desirable because it is relatively slim.

The present invention also provides a portable terminal device having a window of the display device manufactured by the manufacturing method. The portable terminal device is not limited as long as the display device is provided and a window is required. The window of the display device according to the present invention may be laminated on the outer surface of the display device of the portable terminal device, and may be combined with the window coupling part of the portable terminal device (which is well known and thus not described in detail) at predetermined intervals. . In particular, in the case of a portable terminal device, an external display screen (CLI) exposed to the outside is often present, and the window of the present invention may be preferably used as a window of the external display screen.

The above drawings and detailed descriptions are not limited to these examples, so that the present invention is not limited thereto. The scope of rights defined by the claims is not limited, even though there is a limiting and assertive expression.

1 is a diagram illustrating a procedure of a method of manufacturing a window of a display device according to an exemplary embodiment of the present invention.

2A and 2B are a cross-sectional view and a plan view showing an example of a window of a display device manufactured by the manufacturing method;

3 and 4 are plan views showing an example of a method of applying a UV-adhesive to a glass substrate;

Figure 5 is a schematic diagram showing the pressing, degassing using a roll-press,

6 is a view for explaining a method of manufacturing a window of a display device according to another exemplary embodiment of the present invention;

7 is a cross-sectional view of a window of a display device manufactured according to a method of manufacturing a window of a display device according to another embodiment of the present invention;

8 is an enlarged view of a gas removal promoting unit.

Explanation of the main symbols in the drawings

1: Image display area 10: Synthetic resin substrate

11: decoration layer 12: degassing accelerator

20: UV-adhesive 30: glass

50: roll-press 60: transportation means

Claims (14)

Applying a UV-adhesive to the glass; Placing a synthetic resin substrate on the glass to which the UV-adhesive is applied; Passing through the roll-press gradually compressing the synthetic resin substrate from the beginning to the end to remove the gas; And Irradiating UV to cure the UV-adhesive; window manufacturing method of a display device comprising a. The method of claim 1, wherein the front surface or the rear surface of the synthetic resin substrate is decorated by at least one of a deposition method and a printing method. The method of claim 1, wherein the applying of the UV-adhesive to the glass comprises dispersing and spreading a portion of the bonding surface of the glass with the synthetic resin substrate using a dispersing spreader. 4. The method of claim 3, wherein the UV-adhesive is less dispersed and distributed from the start region to the end region of the synthetic resin substrate. The display apparatus of claim 1, wherein the synthetic resin substrate is formed by cutting all or a part of an edge where the side and side of the glass adhering to the glass are cut to promote gas removal during adhesion. Windows manufacturing method. The method of claim 5, wherein the gas removal promoting part is formed by cutting a corner in a straight line or a curve. The method of claim 5, wherein the gas removal promoting part is formed at an end of the synthetic resin substrate, or is formed at an end and both ends. The method of claim 5, wherein the gas removal promoting part is cut and formed within the following numerical range. Length (A) cut from the adhesive surface with glass of synthetic resin substrate = 0.05 ~ 0.85mm Length cut from side of plastic substrate (B) = 0.05 ~ 0.4mm The method of claim 1, wherein the glass is moved by a moving means so that each step is performed by an automated process. 10. The method of claim 9, wherein a plurality of windows are simultaneously manufactured by seating a plurality of glasses on an assembly jig moved by a moving means and performing the respective steps. 10. The method of claim 9, wherein the glass is sized so that the window-shaped synthetic resin substrate can be placed within the range of 3 to 100, the window manufacturing of the display device, characterized in that cut separately after the curing process of the UV-adhesive is completed. Way. The method of claim 1, wherein the glass is tempered glass. A window of a display device manufactured by the manufacturing method of any one of claims 1 to 12. A portable wireless terminal having a window of the display device of claim 13.

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