KR101699305B1 - Tempered Glass for Mobile Devices - Google Patents

Tempered Glass for Mobile Devices Download PDF

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Publication number
KR101699305B1
KR101699305B1 KR1020160003016A KR20160003016A KR101699305B1 KR 101699305 B1 KR101699305 B1 KR 101699305B1 KR 1020160003016 A KR1020160003016 A KR 1020160003016A KR 20160003016 A KR20160003016 A KR 20160003016A KR 101699305 B1 KR101699305 B1 KR 101699305B1
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South Korea
Prior art keywords
layer
glass
tempered glass
glass layer
adhesive
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KR1020160003016A
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Korean (ko)
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구본기
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주식회사 도우인시스
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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
    • 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

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
  • Laminated Bodies (AREA)
  • Surface Treatment Of Glass (AREA)

Abstract

According to the present invention, tempered glass used for a window glass which is installed on a top portion of a touch screen panel (TSP) of a portable terminal for protecting the TSP and a display device disposed under the window glass includes: a lower tempered glass layer making contact with an optically-clear adhesive (OCA) film of the TSP and having a thickness of 400 m or less; an ultra-thin upper tempered glass layer installed at an uppermost portion of the tempered glass and having a thickness of 100 m or less for increasing impact strength of the tempered glass by absorbing an impact applied to the lower tempered glass layer; and an adhesive layer provided between the upper tempered glass layer and the lower tempered glass layer for adhering the upper tempered glass layer and the lower tempered glass layer. The tempered glass further includes a film layer provided between the upper tempered glass layer and the lower tempered glass layer and having heat resistance, transparency, and a thickness of 200 m or less for reducing brittleness of the glass layers, which represents weakness to the impact, and enhancing the impact strength. According to the present invention, strengthened multi-layer tempered glass used for the portable terminal has the impact strength which is more than 2 to 3 times stronger than that of existing glass while maintaining a conventional thickness of 0.55 to 0.7 mm or less, so that impact resistant strength for preventing damage even when the portable terminal is dropped is remarkably increased.

Description

[0001] The present invention relates to a tempered glass for mobile devices,

More particularly, the present invention relates to a tempered glass for use in a window glass which is installed on a touch screen panel and protects a lower portion of the tempered glass, Layer glass reinforced glass which is used in a portable terminal which is formed by forming a tempered glass of 400 mu m in the lower part and bonding two tempered glass with an adhesive.

2. Description of the Related Art [0002] In general, a window glass is attached to a front side of a touch screen in a device having a touch screen, for example, a smart phone, a tablet, a notebook,

Generally, a window glass for display protection is adhered to an upper surface of a display to prevent external shock and scratches and damage to the touch panel provided on the upper surface of the display.

The above-described window glass for display protection is usually formed by forming an adhesive layer on one surface of a tempered glass.

That is, the structure of a touch screen panel of a portable terminal having a touch screen is composed of a window glass for protecting the lower electrode and the display device at the uppermost portion as shown in FIG. 1, and a single-layer or multi- A transparent electrode PET film, and a TSP (Touch Screen Panel) comprising an OCA film as an adhesive film for bonding the window glass to the transparent electrode PET film or for bonding the transparent electrode PET film and the transparent electrode PET film.

A display device is installed under the touch screen panel, and the display device uses a liquid crystal display (LCD) device or an organic light emitting (AMOLED) display device.

Since the portable terminal is portable, the window glass is likely to be broken due to a drop or other shock, so that the window glass and the TSP and the display device on the lower side are bonded to each other. Therefore, only the window glass is broken, It is difficult to replace the window glass alone and it takes a long time even if the window glass can be replaced.

Therefore, the window glass is required to have higher strength than the current strength in a state in which the thickness is not increased without decreasing the current transmittance.

Since the thickness of the currently used window glass is 0.55 to 0.7 mm, a higher strength than that of the current strength is required even when the thickness is maintained or becomes thinner.

Up to now, ultra-thin tempered glass having a thickness of 100 μm or less has not been able to be commercially manufactured due to the problem of breaking in the reinforcing process and cutting process, but now it is possible to increase the strength by the double-layered glass It was possible.

1. Korean Registered Patent Publication No. 10-1557307 (registered on September 25, 2015) Display cover glass 2. Korean Patent Publication No. 10-2013-0101763 (Disclosure date: September 16, 2013) Method for manufacturing window glass for mobile terminals 3. Korean Registered Patent No. 10-1537145 (Registered Date: July 09, 2015) Multi-layer glass panel 4. A method for manufacturing a capacitive touch screen panel of multilayer thin film type, the method comprising the steps of: 5. A process for producing a glass for a touch screen panel provided with a thermal transfer adhesive layer (Korean Patent Laid-Open Publication No. 10-2015-0131550 (published on Nov. 25, 2015)

In order to solve the above-mentioned problems, the present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a double-layer tempered glass or ultra thin tempered glass combined with an ultra thin tempered glass and a thin tempered glass, Layered tempered glass having an increased impact strength of 2 to 3 times or more than that of conventional double-layer tempered glass.

The reinforced glass of the present invention is used in a window glass which is installed on a TSP (Touch Screen Panel) of a portable terminal and protects the TSP and a display device of a lower portion. The TSP's Optically-Clear Adhesive (OCA) A lower reinforcing glass layer contacting the film and having a thickness of 400 m or less; An ultra-thin upper reinforcing glass layer having a thickness of 100 μm or less, which is provided at an uppermost portion of the upper reinforcing glass layer to increase the impact strength of the reinforcing glass by alleviating an impact applied to the lower reinforcing glass layer; And an adhesive layer formed between the upper reinforcing glass layer and the lower reinforcing glass layer and bonding the upper reinforcing glass layer and the lower reinforcing glass layer.

The tempered glass further includes a film layer of 200 탆 or less having heat resistance and transparency between the upper tempered glass layer and the lower tempered glass layer in order to alleviate the weak brittleness to the impact of the glass layer and to improve the impact strength It is possible.

A first adhesive layer formed between the lower reinforcing glass layer and the film layer to bond the lower reinforcing glass layer and the film layer when the film layer is formed; And a second adhesive layer formed between the film layer and the upper reinforcing glass layer and bonding the film layer and the upper reinforcing glass layer.

The adhesive layer is a transparent acryl-based one-component solventless type, and uses a UV curing adhesive (UV curable adhesive) that hardens within a few seconds when irradiated with ultraviolet rays of 200 to 400 nm.

The film layer is heat-resistant and transparent PET (Polyethylene Terephthalate) or polyurethane.

The present invention can solve the problems to be solved by the above-described multi-layer reinforced glass reinforced with strength used in the portable terminal.

According to the reinforced multi-layer tempered glass used in the portable terminal of the present invention, the impact strength is more than 2 to 3 times stronger than the existing thickness while maintaining the thickness of 0.55 to 0.7 mm or less, so that even when the portable terminal is dropped, There is an effect that the impact strength is remarkably increased.

1 is an exploded perspective view of a touch screen panel used in a portable terminal;
2 is a schematic diagram of a curved window glass used in a portable terminal
FIG. 3 is a cross-sectional view of a multi-layer reinforced glass according to a first embodiment of the present invention,
Fig. 4 is a view showing a second embodiment of the reinforced reinforced glass used in the portable terminal of the present invention

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

It should be noted that the following terms are defined in consideration of the functions of the present invention and may vary depending on the intention or custom of the user or the operator, Quot; reinforced glass ", which is incorporated herein by reference in its entirety.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, a preferred embodiment of a "multi-layer reinforced glass with enhanced strength used in a portable terminal" according to the present invention will be described in detail.

The following examples are merely illustrative of the present invention and are not intended to limit the scope of the present invention.

FIG. 1 is an exploded perspective view of a touch screen panel used in a portable terminal, FIG. 2 is a schematic view of a curved window glass used in a portable terminal, FIG. 3 is a perspective view of a curved window glass used in a portable terminal, And FIG. 4 is a second embodiment of the reinforced reinforced glass used in the portable terminal of the present invention.

As shown in FIG. 1, the structure of a TSP (Touch Screen Panel) of a portable terminal includes a window glass for protecting the lower electrode and the liquid crystal at the uppermost portion, a single layer having a sensor region and an electrode region for touching, An OCA (Optically-Clear Adhesive) film which is an adhesive film for adhesion between the transparent window PET film and the transparent electrode PET film, or between the window glass and the transparent electrode PET film, .

As shown in FIG. 3, the first embodiment of the reinforced multi-layer tempered glass A used in the portable terminal of the present invention is installed on the TSP (Touch Screen Panel) of the portable terminal, A lower tempered glass layer 1 used for a window glass for protecting a display device and having a thickness of 400 μm or less and contacting an OCA (Optically-Clear Adhesive) film of the TSP; An upper toughened glass layer 2 of 100 μm or less in thickness which is provided at the uppermost portion of the upper toughened glass layer 1 to increase the impact strength of the tempered glass by alleviating the impact applied to the lower toughened glass layer 1; And an adhesive layer 3 formed between the upper tempered glass layer 2 and the lower tempered glass layer 1 to adhere the upper tempered glass layer 2 to the lower tempered glass layer 1 .

The adhesive layer 3 is a transparent acrylic type monoliquid solvent-free type. Ultraviolet Ray Adhesive (Light Cure Adhesive), which cures in a few seconds when irradiated with ultraviolet rays of 200 to 400 nm, is used.

The lower reinforcing glass layer (1) is formed by etching a 550 탆 or 700 탆 thick raw material glass in an etching apparatus to form a 400 탆 thick glass, and then cutting, chamfering, polishing and chemical strengthening .

The upper toughened glass layer (2) is made of ultra-thin glass to a thickness of 100 μm or less by etching a 550 μm or 700 μm thick raw material glass in an etching apparatus, and then chemical strengthening after cutting, chamfering, polishing and heat treatment It is a rough tempered glass.

The tempered glass may be etched by spraying an etchant using a top spray nozzle spraying method, a side spray nozzle spraying method, or a top and side spray nozzle spraying method.

In the upper tempered glass layer 2, what is called ultra thin is generally referred to as an ultra-thin type having a thickness of 100 μm or less, that is, a thickness of 0.1 mm or less, and a typical thickness of the hair is about 50 to 100 μm.

As shown in FIG. 2, the reinforced reinforced glass (A) used in the portable terminal of the present invention is used in a window glass of a smart phone, and the finished reinforced glass is divided into the lower reinforcing glass layer (1) Is used for the glass layer (2).

As shown in FIG. 4, the second embodiment of the reinforced multi-layer tempered glass A used in the portable terminal of the present invention is installed on the TSP (Touch Screen Panel) of the portable terminal, A lower reinforcing glass layer 1 which is used for a window glass for protecting a display device and has a thickness of 400 μm or less and contacts an OCA (Optically-Clear Adhesive) film of the TSP; An upper toughened glass layer 2 of 100 μm or less in thickness which is provided at the uppermost portion of the upper toughened glass layer 1 to increase the impact strength of the tempered glass by alleviating the impact applied to the lower toughened glass layer 1; An adhesive layer (3) formed between the upper tempered glass layer (2) and the lower tempered glass layer (1) and adhering the upper tempered glass layer (2) and the lower tempered glass layer (1); In order to alleviate weak brittleness to the impact of the glass layer and to improve the impact strength, a film layer 4 having a heat resistance and transparency of 200 탆 or less between the upper tempered glass layer 2 and the lower tempered glass layer 1 ).

The lower reinforcing glass layer (1) is formed by etching a 550 탆 or 700 탆 thick raw material glass in an etching apparatus to form a 400 탆 thick glass, and then cutting, chamfering, polishing and chemical strengthening .

The upper toughened glass layer (2) is made of ultra-thin glass to a thickness of 100 μm or less by etching a 550 μm or 700 μm thick raw material glass in an etching apparatus, and then chemical strengthening after cutting, chamfering, polishing and heat treatment It is a rough tempered glass.

The tempered glass may be etched by spraying an etchant using a top spray nozzle spraying method, a side spray nozzle spraying method, or a top and side spray nozzle spraying method.

The adhesive layer 3 comprises a first adhesive layer 31 formed between the lower reinforcing glass layer 1 and the film layer to bond the lower reinforcing glass layer 1 to the film layer 4; And a second adhesive layer 32 formed between the film layer 4 and the upper toughened glass layer 2 to adhere the film layer 4 and the upper toughened glass layer 2. [

The adhesive layer 3 is a transparent acrylic type monoliquid solvent-free type. Ultraviolet Ray Adhesive (Light Cure Adhesive), which cures in a few seconds when irradiated with ultraviolet rays of 200 to 400 nm, is used.

The film layer 4 is preferably made of heat-resistant transparent polyethylene terephthalate (PET) or polyurethane.

The results of the ball drop test (impact drop test) for comparing the impact strength of the multi-layered tempered glass (A) of the present invention with that of a conventional single-layer tempered glass are shown in Tables 1 to 4 .

In the ball drop test, when a 130 g metal ball is dropped from a height of 15 cm by a surface impact durability test, the test is performed until cracks and breakage occur by increasing the height by 5 cm in the case where cracks and breakages do not occur. ~ In Table 4, it was performed up to 100 cm height.

Table 1 shows the results of a ball drop test for 10 samples of conventional 0.55mm (550um) thick tempered glass for use in window glass, two unbroken samples up to a height of 100cm, and the remaining samples were 90 to 30cm It was all broken in height.

0.55 mmT  Tempered Glass Ball Drop Test Sample No Dropping height (cm) Glass state One 100 Unbreakable 2 100 Unbreakable 3 90 fracture 4 85 fracture 5 75 fracture 6 60 fracture 7 55 fracture 8 40 fracture 9 35 fracture 10 30 fracture

Table 2 shows the results of a ball drop test for 10 samples of tempered glass of 0.3 mm (300 μm) thickness used for window glass. One sample was not broken to a height of 100 cm, It was all broken at a height of 30 cm.

0.3mmT  Tempered Glass Ball Drop Test Sample No Dropping height (cm) Glass state One 100 Unbreakable 2 90 Unbreakable 3 80 fracture 4 70 fracture 5 70 fracture 6 60 fracture 7 45 fracture 8 40 fracture 9 30 fracture 10 30 fracture

Table 3 and Table 4 show that the multilayer reinforced glass of the present invention is used as the lower reinforced glass layer 1 and the reinforced glass layer of 0.3 mm (300 μm) is used as the lower reinforced glass layer 1, The film layer 4 was attached with an adhesive using a PET film. As a result of ball drop test on 10 samples, 0.3 mm (300 탆) reinforced glass and 0.075 mm (75 탆) reinforced glass All cracks and cracks did not occur to a height of 100 cm.

Table 3 shows a sample made of a 0.3 mm T reinforced glass / adhesive / 75 탆 T reinforced glass, which is made of only the adhesive between the lower reinforcing glass layer 1 and the upper reinforcing glass layer 2 without using a PET film, Table 4 shows the results of using a PET film between the lower toughened glass layer 1 and the upper toughened glass layer 2 and using a 0.3 mm T reinforced glass / first adhesive / first adhesive / PET film / second adhesive / 75 占 퐉 T reinforced glass.

0.3mmT  Reinforced glass / first adhesive / 75㎛T tempered glass  Ball Drop Test Test Example Sample No Dropping height (cm) 0.3mmT glass condition 75 탆 T glass state One 100 Unbreakable Unbreakable 2 100 Unbreakable Unbreakable 3 100 Unbreakable Unbreakable 4 100 Unbreakable Unbreakable 5 100 Unbreakable Unbreakable 6 100 Unbreakable Unbreakable 7 100 Unbreakable Unbreakable 8 100 Unbreakable Unbreakable 9 100 Unbreakable Unbreakable 10 100 Unbreakable Unbreakable

0.3mmT  Reinforced glass / first adhesive / PET film / Second adhesive / 75μm T-Strength Glass Ball  Drop Test Example Sample No Dropping height (cm) 0.3mmT glass condition 75 탆 T glass state One 100 Unbreakable Unbreakable 2 100 Unbreakable Unbreakable 3 100 Unbreakable Unbreakable 4 100 Unbreakable Unbreakable 5 100 Unbreakable Unbreakable 6 100 Unbreakable Unbreakable 7 100 Unbreakable Unbreakable 8 100 Unbreakable Unbreakable 9 100 Unbreakable Unbreakable 10 100 Unbreakable Unbreakable

According to the reinforced multi-layer tempered glass used in the portable terminal of the present invention, the impact strength is remarkably stronger than that of the conventional one while maintaining the thickness of 0.55 to 0.7 mm or less, and the impact resistance strength, which may not be damaged even when the portable terminal is dropped, There is an effect of rising.

A: Tempered glass
1: Lower Tempered Glass Layer 2: Upper Tempered Glass Layer
3: adhesive layer 31: first adhesive layer
32: second adhesive layer 4: film layer

Claims (4)

A reinforced glass (A) for use in a window glass installed on a TSP (Touch Screen Panel) of a portable terminal to protect the TSP and a display device at a lower portion thereof,
The reinforcing glass (A) has a lower reinforcing glass layer (1) which is in contact with an OCA (Optically-Clear Adhesive) film of the TSP and has a thickness of 400 μm or less;
An upper reinforcing glass layer (2) having a thickness of 100 탆 or less, which is provided at the uppermost portion of the upper reinforcing glass layer (1) to increase the impact strength of the reinforcing glass by alleviating an impact applied to the lower reinforcing glass layer (1);
And an adhesive layer 3 formed between the upper tempered glass layer 2 and the lower tempered glass layer 1 to adhere the upper tempered glass layer 2 and the lower tempered glass layer 1 ,
The tempered glass (A) has a heat resistance and transparency between the upper tempered glass layer (2) and the lower tempered glass layer (1) in order to alleviate weak brittleness to the impact of the glass layer and to improve impact strength. A film layer 4 having a thickness of not more than 2 mu m,
The adhesive layer 3 is formed between the lower reinforcing glass layer 1 and the film layer 4 and has a first adhesive layer 31 for bonding the lower reinforcing glass layer 1 and the film layer 4, and;
And a second adhesive layer 32 formed between the film layer 4 and the upper toughened glass layer 2 and adhering the film layer 4 and the upper toughened glass layer 2,
The adhesive layer 3 is a transparent acrylic type single-liquid solvent-free type. Ultraviolet Ray Adhesive (Light Cure Adhesive) which is cured within a few seconds when irradiated with ultraviolet rays of 200 to 400 nm is used,
The film layer 4 is made of PET (polyethylene terephthalate) or polyurethane which is heat-resistant and transparent,
The lower reinforcing glass layer (1) is formed by etching a 550 탆 or 700 탆 thick raw material glass in an etching apparatus to form a 400 탆 thick glass, and then cutting, chamfering, polishing and chemical strengthening Is a rough tempered glass,
The upper toughened glass layer (2) is made of ultra-thin glass to a thickness of 100 μm or less by etching a 550 μm or 700 μm thick raw material glass in an etching apparatus, and then chemical strengthening is performed after cutting, chamfering, It is a rough tempered glass,
Wherein the tempered glass is etched by spraying an etchant using a top spray nozzle spraying method, a side spray nozzle spraying method, or a top and side spray nozzle spraying method. .
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KR1020160003016A 2016-01-11 2016-01-11 Tempered Glass for Mobile Devices KR101699305B1 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022085908A1 (en) * 2020-10-22 2022-04-28 코세스지티 주식회사 Ultrathin glass and protective glass, and manufacturing method thereof
US11871604B2 (en) 2020-07-16 2024-01-09 Samsung Display Co., Ltd. Cover window, method of manufacturing the same, and display device having the same

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Publication number Priority date Publication date Assignee Title
KR20120051325A (en) * 2010-11-12 2012-05-22 김승욱 Protect film for mobile phone
KR20120127984A (en) 2011-05-16 2012-11-26 에이스하임 주식회사 Capacitive touch screen panel using multi-layer thin film and manufacturing process thereof
KR20120129200A (en) * 2011-05-19 2012-11-28 (주)유니하이테크 Tempered glass for display screen protection
KR20130003829A (en) * 2011-07-01 2013-01-09 김영수 Filter for protecting touch screen panel
KR20130053158A (en) * 2011-11-15 2013-05-23 주식회사 오리온 Protection glass for display device and setting structure of display device comprising the same
KR20130101763A (en) 2012-03-06 2013-09-16 최관재 Window glass manufacturing methods for mobile devices
KR101537145B1 (en) 2012-10-26 2015-07-15 (주)엘지하우시스 Multi layered glass panel
KR101557307B1 (en) 2015-03-16 2015-10-05 주식회사 제이앤티씨 Display Cover glass
KR20150131550A (en) 2014-05-15 2015-11-25 (주)소프트이콘 Thermal Transfer Adhesive Layer Type Touch Screen Panel Glass Manufacturing Method

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20120051325A (en) * 2010-11-12 2012-05-22 김승욱 Protect film for mobile phone
KR20120127984A (en) 2011-05-16 2012-11-26 에이스하임 주식회사 Capacitive touch screen panel using multi-layer thin film and manufacturing process thereof
KR20120129200A (en) * 2011-05-19 2012-11-28 (주)유니하이테크 Tempered glass for display screen protection
KR20130003829A (en) * 2011-07-01 2013-01-09 김영수 Filter for protecting touch screen panel
KR20130053158A (en) * 2011-11-15 2013-05-23 주식회사 오리온 Protection glass for display device and setting structure of display device comprising the same
KR20130101763A (en) 2012-03-06 2013-09-16 최관재 Window glass manufacturing methods for mobile devices
KR101537145B1 (en) 2012-10-26 2015-07-15 (주)엘지하우시스 Multi layered glass panel
KR20150131550A (en) 2014-05-15 2015-11-25 (주)소프트이콘 Thermal Transfer Adhesive Layer Type Touch Screen Panel Glass Manufacturing Method
KR101557307B1 (en) 2015-03-16 2015-10-05 주식회사 제이앤티씨 Display Cover glass

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11871604B2 (en) 2020-07-16 2024-01-09 Samsung Display Co., Ltd. Cover window, method of manufacturing the same, and display device having the same
WO2022085908A1 (en) * 2020-10-22 2022-04-28 코세스지티 주식회사 Ultrathin glass and protective glass, and manufacturing method thereof

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