KR20090016925A - Spin-window cover structure - Google Patents

Abstract

In the manufacture of the window of the mobile phone, in the manufacture of the window containing the spin, the production of the injection-formed spin is formed on the surface through the injection, the adhesion of the acrylic film on the opposite side where the spin is formed, the spin is In the manufacture of spin-shaped cell phone windows, including the process of depositing metal or oxide on the surface, the process of decorating the periphery of the display through printing, and the cutting to the appropriate size to be mounted on the cell phone through processing. It is about.

Description

Spin-Window Cover Structure

1A is a plan view showing a display and a window plate of a mobile phone.

1B is a cross-sectional view illustrating a display and a window plate of a mobile phone.

2A is a plan view of the window plate of the spin structure.

2B is a cross-sectional view of the window plate of the spin structure.

3 is a cross-sectional view showing a conventional process of forming a spin on the plastic film of the window plate material using the UV curable resin.

4 shows a plan view of a stamp on which a pattern is formed to be mounted on a mold, and a cross-sectional view of a mold structure capable of producing a polycarbonate plate on which a pattern is formed by injection.

5 is a cross-sectional view showing a process of forming a pattern on a transparent polycarbonate plate through injection and a plan view of the spin structure made thereby.

6 is a cross-sectional view illustrating a process of bonding a polycarbonate plate having a pattern formed thereon with an acrylic film having a surface hard coating.

FIG. 7A is a cross-sectional view illustrating the deposition or sputtering of a metal or metal oxide on a patterned surface of the window plate.

FIG. 7 (b) is a cross-sectional view illustrating the printing surface of the structure of FIG. 7 (a) formed on a portion to be decorated instead of the portion where the display is visible by a method such as silk printing.

<Description of the code | symbol about the principal part of drawing>

12: window plate 22: spin

41: stamp 42: injection mold

58: patterned polycarbonate plate 62: UV curing adhesive

63: acrylic film 65: window plate

72: vapor deposition or sputtering 74: decoration part printing

The present invention relates to the manufacture of a window plate for use in a mobile phone.

The window plate is a transparent plate that protects the display of the phone, and the display exterior is decorated.

1 shows a window plate.

In the plan view shown in FIG. 1A, the window plate 12 is shown on the exterior of the display 13 of the mobile phone 11.

Usually, the window plate uses an acrylic film that has been hard coated, a laminated film of an acrylic film and a polycarbonate film, and a glass material.

In the case of lamination of acrylic film and polycarbonate film, the hard coated acrylic film is directed toward the exterior.

1 (b) shows a cross-sectional view of the mobile phone.

As can be seen from this structure, the mobile phone case 11 is equipped with a display 13, a window plate 12 is fixed to the exterior of the display, and the display is connected to the lower electronic circuit board 14. .

In such window plates, the visible part of the display is usually transparent, but the exterior part of the display is decorated.

Alternatively, in the case of a transparent and optical decoration such as spin, the spin decoration may be formed as a whole.

When processing the spin shape like the keypad of a Motorola laser phone, light is reflected and rotates according to the viewing angle.

2 shows a window plate of such a spin structure.

According to the plan view shown in (a) of FIG. 2, the transparent window plate 21 has a concentric spin 22 formed of a transparent material.

These spins are usually triangular in cross section and are formed in spiral or concentric circles.

FIG. 2B shows a cross-sectional view of the spin structure formed in a triangular form.

In the lower portion of the transparent window plate film 21, a protruding shape, which is usually a triangular structure 22, is produced.

This projecting material is made of transparent UV resin or the like, and the size thereof is about 10 to 30 micrometers.

Conventionally, in order to form such a spin structure on a window plate, UV curable resin was used.

UV curable resin is an ultraviolet curable resin that is curable when irradiated with ultraviolet rays while being liquid at room temperature.

3 is a cross-sectional view illustrating a process of forming a spin on a plastic film which is a window plate material using a UV curable resin.

As a plastic film, a transparent acrylic film is usually used or a film obtained by laminating an acrylic film and a polycarbonate film (PC film) is used.

In this case, in most cases, a film having a hard coating of 4H or more is used for the acrylic film.

FIG. 3A shows a cross section of the film 31 that has been hard coated 32.

Since pattern formation such as spin is performed on the opposite side of the hard-coated film, the pattern formation surface is upper in this drawing.

The state which apply | coated the UV curable material 33 to the film is shown by FIG.3 (b).

The UV curable material in the liquid state before curing is applied by silk printing or dipping.

3 (c) shows a process 36 of pressing the stamp 34 with a specific pattern 35 formed on the film to which the UV curable material is applied.

The material of the stamp may be a nickel stamp or a film having a pattern formed thereon.

3 (d) shows a process of curing the UV curable material by irradiating ultraviolet rays 37 toward the transparent film while the stamp 34 and the film 31 are in close contact with each other.

The UV curable material of the liquid is cured in a few seconds to several tens of seconds when it is irradiated with ultraviolet rays to solidify.

In FIG. 3E, a process 38 of separating the film 31 and the stamp 34 is illustrated.

The UV curable material in the film is formed of a pattern 39 of the film to which the pattern of the stamp is transferred.

In actual use, as shown in (f) of FIG. 3, the surface of the film 31, which has become the hard coating 32, is upward, and the pattern surface 39 is on the opposite side.

The problem with the method of forming a pattern on such a conventional film is that a lot of defects occur during the transfer process when forming a pattern having a size of about 10 to 30 micrometers.

In particular, during the curing process, the UV curable material adheres to the stamp, resulting in foreign matter, and the pattern is not properly formed during the next transfer.

In patterns such as spins or holograms formed on the window plate, the pattern is finer, so that defects increase further when transferring.

Therefore, the present invention is devised to solve the above problems, and relates to a structure and a process capable of minimizing defects when forming a fine pattern.

The present invention relates to forming a fine pattern on a window plate in the manufacture of a window plate of a mobile phone, and to a process and a structure for increasing the surface hardness to 4H or more.

In the case of formation of a fine pattern by joining heterogeneous materials by UV curing, which is a conventional method, problems such as a defective rate and difficulty of pattern formation become problems.

In the present invention, the micropattern is formed directly on the shape of a plastic sheet rather than bonding as a heterogeneous material, and is a structure for adhering a separate film for surface protection.

In detail, an injection molding mold in which a fine pattern is formed in a mold is molded from a transparent polycarbonate material to manufacture a polycarbonate plate by injection molding, and a fine pattern of a mold is formed on the polycarbonate plate. The acrylic film is bonded to the opposite side where the fine pattern of the polycarbonate plate is formed, and the upper side of the window plate on the opposite side to the side to which the acrylic film is bonded is a hard coating structure.

The back surface of the fine pattern formed window plate is formed again through the deposition and printing to form a window decoration.

Looking at the manufacturing process and the structure as shown in the drawing as follows.

4 is a cross-sectional view of a mold structure in which a polycarbonate plate having a pattern formed thereon can be produced by injection, and a plan view of a stamp in which a pattern is formed and mounted on the mold is shown.

In FIG. 4, the structure 43 in which the stamp 41 in which the example spin structure was formed is mounted to the injection mold 42 is shown.

The material of the stamp is usually formed by nickel plating, and the method of forming the original plate by plating is most common.

The production of the original plate is generally performed by a method of transferring a pattern through nickel plating on a plate made of phosphor bronze or the like or by etching using a photoresist by a semiconductor process.

In Fig. 4, only the space in which the plastic injection is injected is shown in cross-section in the cross-sectional view of a mold structure in which a patterned stamp is mounted, and the actual mold structure is formed in a general injection mold structure.

5 illustrates a process of forming a pattern on the transparent polycarbonate plate through injection.

The injection mold 51 has a plastic injection portion 52 and a stamp 53 having a pattern formed on one side or both sides of the mold.

The temperature is raised to inject the liquid plastic 54 by applying a pressure 55.

The injected plastic becomes a plastic injection molding 56 having a molded shape in a state of being hardened to solid within the mold.

When the mold is separated in this state (57), the polycarbonate plate 58 is manufactured when a plastic plate having a pattern formed on the surface according to the present invention, that is, a polycarbonate resin is used.

As shown in the planar structure 59 of this polycarbonate plate, a pattern of a stamp disc is formed.

The plastic material may be acrylic resin or other transparent resin in addition to polycarbonate, but in general, polycarbonate resin is most advantageous in terms of strength.

FIG. 6 illustrates a process of bonding a polycarbonate plate having a pattern formed thereon with an acrylic film having a surface hard coating.

After applying the UV curable adhesive 62 to the polycarbonate plate 61, the acrylic film 63 is pressed (64) to adhere, and then irradiated with UV ultraviolet rays to cure.

The hardened state is a window plate 65 to which the polycarbonate plate and the acrylic film are bonded.

In the window plate to protect the display unit of the mobile phone,

In the formation of the pattern structure processed to a window plate,

The metal plate such as aluminum, nickel, chromium, silver, gold, or titanium oxide (TiO2), aluminum oxide (Al2O3), or oxide is formed on the patterned surface of the window plate on which the pattern of spin or hologram or general image form is formed. A metal oxide such as silicon (SiO 2) is coated by vapor deposition or sputtering to make the pattern more visible.

7 shows the process involved in this.

As shown in FIG. 7A, a metal or metal oxide may be formed on the pattern surface of the window plate 71 in which the protective film manufactured according to the present invention and the transparent plastic plate manufactured by injection with the pattern formed are bonded to each other. The deposition (72) of the coating 73 of metal or metal oxide is formed by deposition or sputtering.

Typical coating layers have a thickness ranging from 100 angstroms to 5000 angstroms, and the color varies depending on the coating thickness.

In this way, the printed window plate may be formed on the portion to be decorated instead of the surface where the display is visible, such as silk printing, as shown in (b) of FIG. 7.

Through silk printing, various colors can be produced in the decoration department.

The non-printable part must be etched, so the metal or oxide is etched.

The window plate according to the present invention is a structure in which a fine pattern is formed through injection and a high hardness acrylic film is bonded, and the fine pattern is precise and the defect rate is small compared to the method of making a fine pattern using UV curable resin, so that the mass production is performed. It is easy and cost is reduced.

As described above, although described with reference to the preferred embodiment of the present invention, those skilled in the art various modifications and variations of the present invention without departing from the spirit and scope of the invention described in the claims below I can understand that you can.

Claims (8)

In the window plate to protect the display unit of the mobile phone, The structure of the window plate, The transparent plastic plate made by injection, A window plate comprising a double structure in which a separate plastic film is bonded to a transparent plastic plate. According to claim 1, In the window plate to protect the display unit of the mobile phone, In the formation of the pattern structure processed to a window plate, A plastic plate in which a pattern is formed in a mold during plastic injection, and a pattern is formed on the injection molded product; Bonding the plastic film to the opposite side on which the pattern is formed on the patterned plastic window plate; Forming a coating film through metal to oxide deposition on the surface on which the pattern is formed; It consists of color forming step by printing on decoration part on metal or oxide coating surface A plastic plate on which the pattern is formed, a protective film attached to the opposite side of the surface on which the pattern is formed, and a window plate, characterized in that the metal or oxide coating and the printing are formed on the pattern side. The method of claim 1, Window plate, characterized in that the material of the plastic plate is polycarbonate The method of claim 1, wherein the material of the film is a window plate, characterized in that the acrylic film hard-coated on the surface The window plate according to claim 1, wherein the adhesion of the film to the injection plastic is adhesion using a UV curable resin. The method of claim 2, Window plate, characterized in that the pattern of the plastic plate pattern is formed by injection molding in the form of a spin The method of claim 2, Window plate, characterized in that the pattern of the plastic plate pattern is formed by injection molding in the form of a hologram The method of claim 2, On the side where the pattern of the plastic plate of the patterned plastic plate and the window plate on which the acrylic film was bonded by injection molding was formed, Metal or oxide deposition, Printing on the deposited surface, In the process of etching metal or oxide by etching the unprinted surface, Window plate characterized in that the decoration

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