JP2002067075A - Method of manufacturing transparent panel for display window - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for manufacturing a transparent panel for a display window which can appropriately form an anti-reflection layer even if the transparent panel is curved, while reducing the manufacturing cost of the transparent panel having the anti-reflection layer. Get. SOLUTION: A transparent sheet piece 5 having an antireflection layer 5c or the like is formed in a size corresponding to a transparent panel 1 mounted on a display window 3 of a mobile phone or the like. After the transparent sheet piece 5 is disposed on the inner wall of the molding spaces 13a and 13b of the dies 11 and 12, the transparent resin as the raw material C of the panel body 4 is injected into the molding spaces 13a and 13b. Then, the panel main body 4 is molded, and the panel main body 4 and the transparent sheet piece 5 are integrated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transparent panel mounted on a display window of a liquid crystal display device or a plasma display device used for a cellular phone or the like, and more particularly to a display screen in which external light or the like is reflected on a panel surface. The present invention relates to a method for manufacturing a transparent panel for a display window having an antireflection layer for preventing the display panel from becoming difficult to see.

[0002]

2. Description of the Related Art In a conventional transparent panel, an anti-reflection material is formed by forming a panel body with a transparent resin such as an acrylic resin and then depositing or applying an anti-reflection material or the like on the surface of the panel body. A plurality of layers such as layers have been formed in layers.

In a large display device such as a cathode ray tube of a television, a transparent sheet in which a plurality of layers such as an anti-reflection layer are formed by vapor deposition or coating is formed in advance, and the transparent sheet is used as a display unit of the display device. (See JP-A-9-61602).

[0004]

When the antireflection layer and the like are laminated on the surface of the panel main body, the antireflection layer and the like are laminated on the surface of the panel main body by vapor deposition or coating after forming the panel main body. Therefore, there is a problem in that the production of the transparent panel is troublesome and the production cost is increased.

[0005] When the sheet is attached, air easily enters between the sheet and the display unit, wrinkles are easily formed, and the sheet is easily peeled. Moreover, if the display section is curved, there is a problem in that it is not easy to attach a sheet to the display section.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a method of manufacturing a transparent panel for a display window which can appropriately form an anti-reflection layer even if the transparent panel is curved, while reducing the manufacturing cost of the transparent panel having the anti-reflection layer. Is to get

[0007]

According to the method of manufacturing a transparent panel for a display window of the present invention, a transparent sheet piece 5 having an antireflection layer 5c is formed in a predetermined size corresponding to the transparent panel 1. After the transparent sheet piece 5 is disposed on the inner wall of the molding spaces 13a and 13b of the dies 11 and 12, the raw material C of the panel body 4 is injected into the molding spaces 13a and 13b to form the panel body 4. In addition, the panel body 4 and the transparent sheet piece 5 are integrated.

The transparent sheet pieces 5 are arranged on both inner walls of the molding spaces 13a and 13b of the dies 11 and 12, and the raw material C of the panel body 4 is injected between the transparent sheet pieces 5. can do.

More specifically, the transparent sheet piece 5 is
It can be formed by being cut from a transparent sheet substrate. Also, the transparent sheet piece 5 is
a, hard coat layer 5b, antireflection layer 5c, and water repellent layer 5d
Are sequentially laminated.

The support layer 5a of the transparent sheet piece 5 is on the panel body 4 side. Antireflection layer 5c of transparent sheet piece 5
Consists of multiple layers.

[0011]

According to the method for manufacturing a transparent panel for a display window of the present invention, the molding space 1 is provided in a state where the transparent sheet pieces 5 are arranged on the inner walls of the molding spaces 13a and 13b of the dies 11 and 12.
Since the raw material C is injected into 3a and 13b to form the panel main body 4 and integrate the panel main body 4 and the transparent sheet piece 5, the surface of the panel main body 4 is formed by vapor deposition or coating after the panel main body 4 is formed. As compared with the case where the antireflection layer 5c and the like are sequentially laminated and formed, the labor and time required for manufacturing the transparent panel 1 can be reduced, and the manufacturing cost of the transparent panel 1 can be reduced.

Moreover, no air enters between the transparent sheet piece 5 and the panel body 4, no wrinkles are formed on the transparent sheet piece 5, and the transparent sheet piece 5 does not peel off. Therefore, the transparent panel 1 having the antireflection layer 5c
Can be manufactured properly. Even if the surface of the panel body 4 has a curved shape, the molding spaces 13a and 13b of the dies 11 and 12 are formed according to the shape, and the transparent sheet piece 5 is formed on the inner wall of the molding spaces 13a and 13b. The transparent sheet piece 5 can be easily integrated on the surface of the curved panel main body 4 by setting it in a curved shape.

[0013]

1 to 4 exemplify a transparent panel for a display window according to the present invention. As shown in FIG. 2, the transparent panel 1 is mounted on, for example, a display window 3 of a mobile phone 2 so that a display screen A (see FIG. 3) can be visually recognized through the transparent panel 1.

As shown in FIG. 4, the transparent panel 1 has a panel body 4 made of a transparent resin such as an acrylic resin, and a transparent body which is fixed and integrated on both the front and back surfaces (up and down in FIG. 4) of the panel body 4 respectively. And a sheet piece 5.
The panel body 4 has a thickness of, for example, 2 mm. Each transparent sheet piece 5 is formed by sequentially laminating a hard coat layer 5b, an antireflection layer 5c and a water repellent layer 5d on a support layer 5a as shown in FIG.

The support layer 5a is made of, for example, a polyethylene terephthalate (PET) film having a thickness of 188 μm. The hard coat layer 5b protects the support layer 5a that is easily damaged, and is formed by applying an organic polyfunctional acrylic resin or the like to the support layer 5a to a thickness of, for example, 15 μm. The antireflection layer 5c has a thickness of, for example, 0.2 μm. The antireflection layer 5c has, for example, a four-layer structure in order to prevent reflection of light of various wavelengths. Each layer of the antireflection layer 5c is formed by, for example, vacuum-depositing a transparent thin film such as a metal oxide. The antireflection layer 5c may have a five-layer structure to a seven-layer structure.
The water-repellent layer 5d prevents the transparent panel 1 from being stained.
It is formed by coating a fluoroalkylsilane or the like to a thickness of, for example, 0.003 μm by sputtering or the like.

Next, a method for manufacturing the transparent panel 1 will be described. Each transparent sheet piece 5 is cut out from a transparent sheet base material (not shown) by punching using a punching die or the like. This transparent sheet substrate has a length and a width enough to allow a considerable number of transparent sheet pieces 5 to be punched out, and the support layer 5a, the hard coat layer 5b, the antireflection layer 5c, and the water-repellent layer 5d are formed as described above. They are stacked in advance.

The punched transparent sheet piece 5 is set in a mold for forming the transparent panel 1 as shown in FIG. In other words, the mold is configured to simultaneously mold two transparent panels 1 (two upper and lower panels in FIG. 5), and a fixed mold 11 and a movable mold that moves toward and away from the fixed mold 11. And a mold 12. Molding spaces 13a and 13b are formed on the joint surface side of the two dies 11 and 12, respectively, and a resin flow path 14 is connected to the molding spaces 13a and 13b. A gate 15 provided in the fixed mold 11 is connected to the resin flow path 14, and a transparent resin such as an acrylic resin, which is a raw material C of the panel body 4, is injected from the gate 15.

Then, the transparent sheet pieces 5 are set on both inner walls of the molding spaces 13a and 13b, respectively (the state of FIG. 5). At this time, the transparent sheet pieces 5 are set such that the water-repellent layer 5d is on the back wall side. In this state, the movable mold 12
Is closed, and the transparent resin (raw material) C is injected from the gate 15 into the two molding spaces 13a and 13b via the resin flow path 14 (state in FIG. 6). As a result, the panel body 4 is formed into a predetermined shape, and the transparent sheet pieces 5 are fixed to the front and back surfaces of the panel body 4 to be integrated.

As described above, since the transparent resin C is injected between the transparent sheet pieces 5 to integrate the transparent sheet piece 5 and the panel body 4, air is generated between the transparent sheet piece 5 and the panel body 4. The transparent sheet piece 5 does not enter or wrinkle, and the transparent sheet piece 5 does not peel off.

As shown in FIG. 7, for example, even if one surface (the upper surface in FIG. 7) of the panel body 4 is curved, the molding spaces 13a and 13b of the dies 11 and 12 are formed in accordance with the shape. Then, the transparent sheet piece 5 is placed in the molding space 13.
The transparent sheet piece 5 can be easily integrated on the surface of the curved panel body 4 by setting it in a curved shape on the inner wall of the a.13b.

[Brief description of the drawings]

FIG. 1 is an enlarged sectional view of a transparent panel according to the present invention.

FIG. 2 is a front view of a mobile phone as an example of using a transparent panel.

FIG. 3 is a front view of a transparent panel.

FIG. 4 is a sectional view taken along line BB of FIG. 3;

FIG. 5 is a cross-sectional view illustrating a method for manufacturing a transparent panel.

FIG. 6 is a cross-sectional view illustrating a method for manufacturing a transparent panel.

FIG. 7 is a cross-sectional view showing another example of the transparent panel.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Transparent panel 4 Panel body 5 Transparent sheet piece 5a Support layer 5b Hard coat layer 5c Antireflection layer 5d Water repellent layer 11 Fixed mold 12 Movable mold 13a / 13b Molding space C Transparent resin (raw material)

Continued on the front page (51) Int.Cl. ⁷ Identification FI FI Theme Court II (Reference) // B29L 9:00 G02B 1/10 A (72) Inventor Takuaki Nara Oyamazaki-cho, Oyamazaki-cho, Otonun-gun, Kyoto 45-45 Address 101, Maxell Seiki Co., Ltd. (72) Inventor Masayoshi Onishi 45, Oyamazaki-cho, Oyamazaki-cho, Otonun-gun, Kyoto Prefecture, Japan 45 Address 101, Maxell Seiki Co., Ltd. No. 3-16, Toyo Metallizing Co., Ltd. (72) Inventor Takeo Abe 3-3-16, Nihonbashi Honishicho, Chuo-ku, Tokyo Toyo Metallizing Co., Ltd. (72) Inventor Atsushi Ozeki Nihonbashimoto, Chuo-ku, Tokyo 3-16 Ishimachi F-term (reference) in Toyo Metallizing Co., Ltd. JK12E JN01B JN01C JN01E JN 06A JN06D 4F206 AA21 AD08 AD35 AG03 AH81 JA07 JB12 5G435 AA00 AA01 AA08 HH02 HH03 HH05 KK07 KK10 LL07

Claims (6)

[Claims] 1. A transparent sheet piece 5 having an antireflection layer 5c.
Is formed in a predetermined size corresponding to the transparent panel 1, and the transparent sheet piece 5 is formed into a molding space 13 of the molds 11 and 12.
a, 13b, and then the molding space 13a
A method of manufacturing a transparent panel for a display window, comprising: injecting the raw material C of the panel main body 4 into 13b to form the panel main body 4 and integrating the panel main body 4 with the transparent sheet piece 5. 2. The transparent sheet piece 5 is disposed on each of the inner walls of the molding spaces 13a and 13b of the molds 11 and 12, and the raw material C of the panel body 4 is injected between the transparent sheet pieces 5. 2. The method for producing a transparent panel for a display window according to item 1. 3. The method for manufacturing a transparent panel for a display window according to claim 1, wherein the transparent sheet piece 5 is formed by cutting off a transparent sheet substrate. 4. The transparent panel for a display window according to claim 1, wherein the transparent sheet piece 5 comprises a support layer 5a, a hard coat layer 5b, an antireflection layer 5c, and a water-repellent layer 5d laminated in this order. Manufacturing method. 5. The method for manufacturing a transparent panel for a display window according to claim 4, wherein the support layer 5a is on the panel main body 4 side. 6. The method according to claim 5, wherein the anti-reflection layer 5c comprises a plurality of layers.