KR101146602B1 - The structure of the cover window for touch screen panels and the manufacturing methods of the same - Google Patents

The structure of the cover window for touch screen panels and the manufacturing methods of the same Download PDF

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Publication number
KR101146602B1
KR101146602B1 KR1020110084753A KR20110084753A KR101146602B1 KR 101146602 B1 KR101146602 B1 KR 101146602B1 KR 1020110084753 A KR1020110084753 A KR 1020110084753A KR 20110084753 A KR20110084753 A KR 20110084753A KR 101146602 B1 KR101146602 B1 KR 101146602B1
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KR
South Korea
Prior art keywords
resin sheet
transparent plastic
acrylic resin
touch screen
cover window
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KR1020110084753A
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Korean (ko)
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이희성
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이희성
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0412—Digitisers structurally integrated in a display
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04103—Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices

Abstract

PURPOSE: A cover window structure of a touch screen panel and a manufacturing method thereof are provided to include advantage of a reinforcement glass and advantage of acrylic material by welding an acrylic resin sheet and a transparent plastic resin. CONSTITUTION: An acrylic resin sheet(110) and a transparent plastic panel(120) are welded by thermo-compression bonding. A printing layer(130) is formed in a rear side of the acrylic resin sheet. The transparent plastic resin is welded on the acryl resin sheet. The transparent plastic resin is a transparent polycarbonate polymer. A UV(Ultra violet) resin coating layer(140) is formed in the front side of the acrylic resin sheet.

Description

Structure of the cover window for touch screen panels and the manufacturing methods of the same}

The present invention relates to a cover window structure of a touch screen panel and a method of manufacturing the same. More specifically, the cover window of a touch screen panel used in a smartphone, a tablet PC, a navigation device, a game machine, etc. By manufacturing the injection molding of the resin at the same time to improve the disadvantages of the cover window structure of the conventional tempered glass or acrylic plate material and to reduce the manufacturing cost and to improve the productivity of the cover window structure of the touch screen panel and its manufacturing method It is about.

In general, the touch screen panel is installed on the screen of an electronic device such as a smartphone, a tablet PC, a navigation device, a game machine, and when a user presses an Indium Thin Oxide (ITO) film on the touch panel while viewing the screen, information corresponding to the coordinates is inputted. It is a working device.

Such a touch screen panel is usually made by laminating an ITO film substrate and a glass substrate or laminating a plurality of film substrates and a synthetic resin substrate (usually PC or acrylic).

In more detail, the structure of the conventional touch screen panel, as shown in Figure 1, the cover window is located at the top layer, the transparent transparent adhesive sheet (OCA) and the transparent conductive film treatment (ITO treatment) PET at the bottom The layers are alternately formed in two layers and placed on the LCD module.

At this time, the cover window located in the uppermost layer is mainly composed of tempered glass or acrylic plate, the first tempered glass used as a cover window can be manufactured at a low cost by a method called soda lime (sodalime). This method is to strengthen the glass by immersing the glass in potassium nitrate (KNO3) solution for 8 hours at 410 ℃ due to the problem of the environmental wastewater during the manufacturing process has not been used in recent years.

In recent years, tempered glass, which is called Godzilla glass, is formed by heating a molded plate glass to 500 to 600 ° C. close to the softening temperature and quenching it with compressed cooling air, compressing and deforming the surface portion of the glass and tensioning the inside. However, when the glass is broken by the impact, the glass of Godzilla is expensive because of the risk of scattering of fragments and cutting and chamfering of each corner when making tempered glass into parts. There is a problem that the diffusion is not smooth.

In addition, when the acrylic plate is used as the cover window material, the acrylic plate has a high light transmittance (about 97%), so it is possible to manufacture a low-cost cover window, but it is easily broken by the impact on the surface, and low heat. There is a problem that the product is deformed or damaged at the time of use of the application product at the deformation temperature or the condition of high temperature in the vehicle in summer and outdoor use in winter.

In recent years, tempered glass or acrylic sheet, which is used as a cover window material, generally forms a printing layer of various colors on the rear of a transparent window, and a step is formed between the printing layer and the transparent window, and the printing layer is formed in bright white. In the case of forming, the number of times of printing is increased to maintain the shielding.

Because of this step, the plane adhesion with the components disposed on the lower portion of the cover window is inferior, thereby filling the step. In this case, a method used to fill the step is to use a light-transparent adhesive sheet (OCA) or step There is a method of applying a UV resin to the part and then leveling or using PET coated with a light-transparent adhesive.

However, when filling the step by the above method, not only the manufacturing process is complicated, but also there is a problem that the light transmittance expressed through the cover window is reduced.

Meanwhile, Korean Patent Laid-Open Publication No. 10-2010-0109645 discloses a method of adhering a window glass and a panel, and the main technical configuration thereof is shown in FIG. 2. A printing layer forming step of forming a printing layer by repeatedly printing a color several times to block light on a part of the glass; A curing agent applying step of applying a curing agent capable of transmitting light to the rest or the entirety of the window glass in which the printing layer is not formed in the printing layer forming step; A curing agent curing step of solidifying the curing agent applied in the curing agent applying step; And a bonding step of adhering the panel to perform the designated function on the window glass, wherein the curing agent applied in the curing agent applying step is applied to at least the thickness of the printed layer printed in the printing step.

However, as described above, since the window glass is used as the cover window of the touch screen, not only the problem of the above-mentioned tempered glass is maintained but also the process of applying a curing agent to the step formed by the window glass and the printing layer. Because of the complexity of the manufacturing process, there is a problem that the light transmittance is reduced.

That is, in the curing agent application step as described above may cause problems such as bubbles generated during the curing agent application process, the yield may be reduced, there is a problem such as the light transmittance of the transparent window is lowered by the overlapping parts will be.

The present invention has been made to solve the problems as described above, the object of the present invention by bonding the acrylic resin sheet and the transparent plastic resin integrally by injection molding or thermocompression bonding tempered glass having a strong surface hardness and excellent light transmittance And all of the advantages of inexpensive and lightweight acrylic materials, while reducing the disadvantages of tempered glass, which are expensive, heavy, and productive, and those that are inferior in heat and impact resistance. The present invention provides a cover window structure of a touch screen panel and a method of manufacturing the same.

In addition, the present invention is to place the printed layer between the acrylic resin sheet and the transparent plastic resin layer which is integrally bonded by injection molding or thermocompression, so that the transparent plastic resin layer has smoothness without additional parts and processes. Another object of the present invention is to provide a cover window structure of a touch screen panel and a method of manufacturing the same, which can manufacture a product without decreasing light transmittance by a simple process.

According to an aspect of the present invention,

In the cover window structure of the touch screen panel, the acrylic resin sheet and the transparent plastic resin are bonded and formed by injection molding.

In the cover window structure of the touch screen panel, the acrylic resin sheet and the transparent plastic resin panel are bonded and formed by thermocompression bonding.

At this time, the transparent plastic resin is characterized in that the transparent polycarbonate resin.

In addition, a printing layer is formed on the rear edge of the acrylic resin sheet, and the transparent plastic resin is formed by bonding the acrylic resin sheet to maintain the smoothness of the rear portion.

And, the front surface of the acrylic resin sheet is characterized in that the homogeneous UV resin coating layer is formed.

On the other hand, the cover window manufacturing method of the touch screen panel according to the present invention,

In the method of manufacturing a cover window of a touch screen panel, a bonding step of integrally bonding a transparent plastic resin to the rear surface of the acrylic resin sheet processed in the form of a touch screen panel, ITO treatment on the rear surface of the transparent plastic resin electrode or It comprises a ITO treatment step constituting the circuit and forming a UV coating layer for coating a homogeneous UV resin on the front surface of the acrylic resin sheet.

In this case, the printing layer is formed on the rear edge of the acrylic resin sheet before the bonding step, so that the printing layer is formed between the acrylic resin sheet and the transparent plastic resin.

In the bonding step, the transparent plastic resin is integrally bonded to the rear surface of the acrylic resin sheet by injection molding.

In the bonding step, the transparent plastic resin is integrally bonded to the rear surface of the acrylic resin sheet by a thermocompression bonding method.

According to the present invention, by bonding the acrylic resin sheet and the transparent plastic resin integrally by injection molding or thermocompression bonding, both the advantages of tempered glass with high surface hardness and excellent light transmittance, and low cost of manufacturing and light acrylic material In addition, it has an excellent effect of eliminating both the disadvantages of tempered glass, which requires a lot of production costs, is heavy, and has low productivity, and that of acrylic materials, which are inferior in heat resistance and impact resistance.

Further, according to the present invention, the printed layer is positioned between the acrylic resin sheet and the transparent plastic resin layer, which are integrally bonded by injection molding or thermocompression, so that the transparent plastic resin layer has smoothness without any additional parts and processes. The simpler process further has the effect of producing the product without lowering the light transmittance.

1 is a cross-sectional view schematically showing the structure of a conventionally used touch screen panel.
Figure 2 is a view showing a window glass module manufactured by a conventional method of bonding the window glass and the panel.
Figure 3 (a), (b), (c) is a plan view and a side cross-sectional view showing a cover window structure of the touch screen panel according to the present invention.
4 is a flowchart illustrating a method of manufacturing a cover window of a touch screen panel according to the present invention.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the cover window structure and the manufacturing method of the touch screen panel according to the present invention.

(A), (b), (c) is a plan view and a side cross-sectional view showing a cover window structure of the touch screen panel according to the present invention, Figure 4 is a method of manufacturing a cover window of the touch screen panel according to the present invention It is a flow chart shown.

The present invention by manufacturing the cover window 100 of the touch screen panel used for smartphones, tablet PCs, navigation, game machines, etc. by simultaneously injection molding the acrylic resin sheet 110 and the transparent polycarbonate-based resin, conventional glass or acrylic The present invention relates to a cover window structure of a touch screen panel and a method of manufacturing the same, which can improve the disadvantages of the cover window 100 structure and reduce the manufacturing cost and improve productivity. The cover window 100 of the touch screen panel includes an acrylic resin sheet 110 and a transparent plastic resin layer 120, as shown in FIGS. 3A and 3B.

In more detail, the acrylic (PMMA, polymethylmethacrylate) resin sheet 110 serves as a transparent window 160 of the touch screen panel, and the polymer is composed of acrylic, silicon / acryl, and SBR (Styrene Butadiene Rubber). ), PBD (Polybutadiene) can have a high adhesive strength with the transparent plastic resin layer 120, and can also ensure excellent visibility of about 97% light transmittance characteristics.

Next, the transparent plastic resin layer 120 is integrally formed by injection molding or thermocompression bonding on the rear surface of the acrylic resin sheet 110, and is used to improve heat resistance and durability of the cover window 100.

That is, the conventional cover window (100) made of tempered glass or acrylic plate is a part disposed in the lower part of the cover window 100 by scattering pieces of the product when the product is damaged due to inadvertent fall or impact from the outside when handling the product. In the present invention, the acrylic resin sheet 110 and the transparent plastic resin layer 120 are integrally bonded to each other by injection molding or thermocompression. It is configured not to be scattered by mutual bonding force even when damaged by impact.

In addition, since the transparent plastic resin layer 120 is a high transparency having a light transmittance of about 97% as in the acrylic resin sheet 110, there is no fear of harming the visibility of the cover window 100, and excellent heat resistance and impact resistance Therefore, it is possible to improve the characteristics that are easily broken by the impact of the weak point of the acrylic resin sheet 110 and the degradation temperature.

In this case, a polycarbonate-based resin is mainly used as the transparent plastic resin layer 120. The resin of the polycarbonate-based resin has excellent optical characteristics (visibility), heat resistance and impact resistance, injection molding and heat This is because not only the molding is easy but also the high adhesive force with the acrylic resin sheet 110.

Meanwhile, a printing layer 130 may be formed at a rear edge portion of the acrylic resin sheet 110 to prevent light transmitted from the backlight unit from being transmitted. The printing layer 130 may be formed of an acrylic resin sheet 110. Since the transparent plastic resin layer 120 is formed between the transparent plastic resin layer 120 and the transparent plastic resin layer 120 without additional additives such as OCA (Optical Clear Adhesive).

That is, in order to fill the step formed by the printing layer 130 formed on the rear edge of the tempered glass or acrylic plate, it is necessary to include an operation process such as forming an OCA layer or applying a curing agent to cover windows 100. Compared to the light transmittance of the a) or the yield is reduced due to the generation of bubbles in the work process, in the present invention, after forming the printing layer 130 on the rear edge of the acrylic resin sheet 110, Forming the OCA layer by forming the transparent plastic resin layer 120 by injection molding or thermocompression to the outside so that the printing layer 130 is formed between the acrylic resin sheet 110 and the transparent plastic resin layer 120. It is possible to smoothly manufacture the rear part of the transparent plastic resin layer 120 without any additional process such as.

Meanwhile, an electrode or a circuit may be configured by forming a transparent conductive film on the rear surface of the transparent plastic resin layer 120 smoothly formed as described above through indium thin oxide (ITO) treatment, and at this time, the transparent plastic resin layer 120 The flat planar structure of) enables to form a transparent conductive film without using an additional ITO PET film or the like.

Next, the front surface of the acrylic resin sheet 110 may be formed of a high hardness UV coating layer 140 by coating a homogeneous, that is, acrylic UV resin, the UV coating layer 140 is an acrylic resin sheet 110 ) Surface has the same feel as tempered glass and at the same time improves the surface hardness to prevent scratches.

Next, a cover window manufacturing method of the touch screen panel according to the present invention will be described in detail with reference to the accompanying drawings.

Cover window manufacturing method of the touch screen panel according to the present invention is largely as shown in Figure 4, the print layer forming step (S10), bonding step (S20), ITO processing step (S30) and UV coating layer forming step (S40) It is made to include.

In more detail, the printing layer forming step (S10) relates to the step of forming the printing layer 130 on the rear edge of the acrylic resin sheet 110 processed in the form of a touch screen panel, which is in the backlight unit It is to prevent the inside of the touch screen panel from being seen from the outside by preventing the light to be transmitted to the outside.

Next, the bonding step (S20) is processed in the form of a touch screen panel to form a transparent plastic resin layer 120 integrally bonded to the back of the acrylic resin sheet 110, the print layer 130 is formed on the rear edge portion. Regarding the steps, as described above, injection molding and thermocompression methods are used.

In more detail, the injection molding method first inserts the acrylic resin sheet 110 having the printing layer 130 into the injection mold and then injects the transparent plastic resin to improve the smoothness of the transparent plastic resin without any additional configuration and additional process. While maintaining, the printing layer 130 is positioned between the acrylic resin sheet 110 and the transparent plastic resin layer 120 to be integrally bonded, and the thermocompression method includes an acrylic resin sheet having the printing layer 130 formed thereon ( The transparent plastic resin panel is crimped together by high temperature and high pressure to the rear portion of the 110.

Next, the ITO treatment step (S30) is subjected to ITO treatment on the rear surface of the transparent plastic resin layer 120 in a state of being integrally bonded with the acrylic resin sheet 110, as shown in FIG. It relates to the step of forming the ITO treatment layer 150 constituting the circuit, the UV coating layer forming step (S40) is on the front surface of the acrylic resin sheet 110 in a state of being integrally bonded with the transparent plastic resin layer 120. By forming a UV coating layer 140 by coating a homogeneous, that is, an acrylic UV resin, the surface of the acrylic resin sheet 110 may have a tactile feel, such as tempered glass, and at the same time, surface hardness may be improved to prevent scratches. It is about the steps to make.

Therefore, according to the cover window structure and the manufacturing method of the touch screen panel according to the present invention as described above by bonding the acrylic resin sheet 110 and the transparent plastic resin integrally by injection molding or thermocompression bonding, the surface hardness is strong and light It contains both the advantages of tempered glass with excellent transmittance and the advantages of cheaper and lighter acrylic material, but the disadvantages of tempered glass, which are expensive, heavy and less productive, and less resistant to heat and impact. Not only can all be eliminated, but the printing layer 130 is positioned between the acrylic resin sheet 110 and the transparent plastic resin layer 120 which are integrally bonded by injection molding or thermocompression bonding so that additional parts And the transparent plastic resin layer 120 without the process to have a smoother by a simpler process Without decreasing the light transmittance to have a number of benefits, such as capable of producing the product.

Although the above embodiments have been described with respect to the most preferred examples of the present invention, it is not limited to the above embodiments, and it will be apparent to those skilled in the art that various modifications are possible without departing from the technical spirit of the present invention.

The present invention relates to a cover window structure of a touch screen panel and a method of manufacturing the same. More specifically, the cover window of a touch screen panel used in a smartphone, a tablet PC, a navigation device, a game machine, etc. By manufacturing the injection molding of the resin at the same time to improve the disadvantages of the cover window structure of the conventional tempered glass or acrylic plate material and to reduce the manufacturing cost and to improve the productivity of the cover window structure of the touch screen panel and its manufacturing method It is about.

100: cover window 110: acrylic resin sheet
120: transparent plastic resin layer 130: printing layer
140: UV coating layer 150: ITO treatment layer
160: transparent window
S10: printing layer forming step S20: bonding step
S30: ITO treatment step S40: UV coating layer forming step

Claims (9)

In the cover window structure of the touch screen panel,
The acrylic resin sheet and the transparent plastic resin are bonded and formed by injection molding,
A print layer is formed on the rear edge of the acrylic resin sheet, and the transparent plastic resin is bonded to the acrylic resin sheet so that the smoothness of the rear portion is maintained.
In the cover window structure of the touch screen panel,
The acrylic resin sheet and the transparent plastic resin panel are formed by bonding by thermocompression,
A print layer is formed on the rear edge of the acrylic resin sheet, and the transparent plastic resin is bonded to the acrylic resin sheet so that the smoothness of the rear portion is maintained.
3. The method according to claim 1 or 2,
The transparent plastic resin is a cover window structure of a touch screen panel, characterized in that the transparent polycarbonate resin.
delete 3. The method according to claim 1 or 2,
The cover window structure of the touch screen panel, characterized in that the homogeneous UV resin coating layer is formed on the front portion of the acrylic resin sheet.
In the manufacturing method of the cover window of the touch screen panel,
A printing layer forming step of forming a printing layer on the rear edge of the acrylic resin sheet;
Bonding step of bonding the transparent plastic resin to the back of the acrylic resin sheet processed in the form of a touch screen panel integrally so that the printing layer is formed between the acrylic resin sheet and the transparent plastic resin,
An ITO treatment step of constructing an electrode or a circuit by performing ITO treatment on the rear surface of the transparent plastic resin;
It comprises a UV coating layer forming step of coating a homogeneous UV resin on the front surface of the acrylic resin sheet,
In the bonding step, the cover window manufacturing method of the touch screen panel, characterized in that the transparent plastic resin is integrally bonded to the back of the acrylic resin sheet by injection molding or thermocompression bonding.

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KR1020110084753A 2011-08-24 2011-08-24 The structure of the cover window for touch screen panels and the manufacturing methods of the same KR101146602B1 (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20140035620A (en) * 2012-09-14 2014-03-24 삼성전자주식회사 A protective device for portable terminal
KR101467444B1 (en) 2014-04-15 2014-12-02 룩씨스 주식회사 Method for manufacturing camera glass structure including UV pattern
KR101467445B1 (en) 2014-04-15 2014-12-02 룩씨스 주식회사 Method for manufacturing LCD window
KR101513970B1 (en) 2013-09-05 2015-04-23 범진아이엔디(주) Method for manufacturing a view cover for a lcd screen of an electronic device and a view cover manufactured thereby

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20090091760A (en) * 2006-12-28 2009-08-28 다이세이 플라스 가부시끼가이샤 Metal/resin composite and process for producing the same
KR20100031380A (en) * 2008-09-12 2010-03-22 (주) 태양기전 Touch panel for window and method thereof
KR20100065486A (en) * 2008-12-08 2010-06-17 주식회사 엔에이치케이플러스 Touch panel structure
KR20110080606A (en) * 2010-01-06 2011-07-13 에스에이치모바일 (주) Touch screen apparatus in a display apparatus and fabrication method thereof

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20090091760A (en) * 2006-12-28 2009-08-28 다이세이 플라스 가부시끼가이샤 Metal/resin composite and process for producing the same
KR20100031380A (en) * 2008-09-12 2010-03-22 (주) 태양기전 Touch panel for window and method thereof
KR20100065486A (en) * 2008-12-08 2010-06-17 주식회사 엔에이치케이플러스 Touch panel structure
KR20110080606A (en) * 2010-01-06 2011-07-13 에스에이치모바일 (주) Touch screen apparatus in a display apparatus and fabrication method thereof

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20140035620A (en) * 2012-09-14 2014-03-24 삼성전자주식회사 A protective device for portable terminal
KR101994889B1 (en) 2012-09-14 2019-07-01 삼성전자 주식회사 A protective device for portable terminal
KR101513970B1 (en) 2013-09-05 2015-04-23 범진아이엔디(주) Method for manufacturing a view cover for a lcd screen of an electronic device and a view cover manufactured thereby
KR101467444B1 (en) 2014-04-15 2014-12-02 룩씨스 주식회사 Method for manufacturing camera glass structure including UV pattern
KR101467445B1 (en) 2014-04-15 2014-12-02 룩씨스 주식회사 Method for manufacturing LCD window

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