KR100893498B1 - Touch panel - Google Patents

Abstract

A touch panel is provided to omit a dust-scattering prevention film by forming the touch panel with only a window and a touch pad for preventing the dust-scattering, thereby increasing the light transmission of the touch panel and reducing the thickness. A window part(210) protects a liquid crystal display module in which an image is formed. A dust-scattering prevention touch pad part(220) of a capacitance type is combined with the window part. When the window part is touched, the touch pad part inputs an electric signal to the liquid crystal display module and prevents the broken glass pieces from being scattered. The touch pad part includes an ITO(Indium Tin Oxide) film(221) and an electrode(222). The electrode is printed on the edge of a lower surface of the ITO film. The ITO film has the same area as that of the window part.

Description

Touch panel {Touch panel}

The present invention relates to a touch panel, and more particularly, to a touch panel capable of omitting a scattering prevention film of a touch panel used in a conventional liquid crystal display device.

Along with the development of computers using digital technology, auxiliary devices are being developed accordingly, and personal computers, portable transmission devices, and other personal information processing devices include various input devices such as a keyboard, a mouse, and a digitizer. Input device) processes text and graphics.

As the information society progresses, the use of PCs is gradually increasing. As a result, it is difficult to operate an efficient product only with a keyboard and a mouse that act as an input device as an interface. In addition, there is a strong demand for the development of a device that can be easily input by anyone, in particular, information input by hand while being carried by the customer.

In addition, attention is now shifting to more sophisticated technologies such as high reliability, the provision of new features, durability, and manufacturing techniques for design and processing involving materials or materials, beyond meeting the general needs of these input devices. In response to this purpose, a touch panel has been developed as an input device that is simple and has low misoperation and enables input of information such as character input without any other input device.

The touch panel is applied to the display surface of flat panel display devices such as electronic organizers, liquid crystal display devices (LCDs), plasma display panels (PDPs), electroluminescenses (EL), and image display devices such as cathode ray tubes (CRTs). It is installed and used to allow the user to select the desired information while viewing the image display device. It is largely a resistive type touch panel, a capacitive type touch panel, and an electromagnetic field type (EM). , Electro-Magnetic Type touch panel, Saw Type and Infrared Type touch panel.

The touch panel considers not only signal amplification problem, resolution difference, difficulty of design and processing technology, but also the optical, electrical, mechanical, environmental, input, durability and economical characteristics of each touch panel. Selected for individual electronic products, particularly resistive type touch panels and capacitive type touch panels are widely used in electronic notebooks, PDAs, portable PCs and mobile phones.

Among these, the capacitive type touch panel includes a pen or a finger by installing a film on which a transparent electrode is formed on a liquid crystal panel and applying a voltage to each corner or corner of the film to generate a uniform electric field on the transparent electrode. When a point is touched through an input means such as a voltage drop, a voltage drop is generated to find a position coordinate.

1 is a side view of a capacitive type touch panel according to the prior art.

Referring to FIG. 1, a capacitive type touch panel 800 according to the related art is a window disposed on one surface of a liquid crystal display device to protect a liquid crystal display module (LCM, not shown) in which an image is formed. 810 and the shatterproof film 820 coupled to one side of the window 810 to prevent the debris from splashing to the user when the window 810 is damaged, and on one side of the shatterproof film 820 It includes a touch pad unit 830 is coupled.

Here, the window 810 is generally made of a transparent material, such as glass or acrylic, and is attached to the anti-scattering film 820 by OCA (840, Optical Clear Adheive).

In addition, on one side of the anti-scattering film 820, a printed layer 850 is printed on which information such as a company's logo is written, and the anti-scattering film 820 is a touch pad part by an OCA (840, Optical Clear Adheive). 830 is attached.

However, the conventional touch panel 800 has a problem in that the light transmittance is decreased by the scattering prevention film 820 and the thickness of the touch panel 800 itself increases.

In addition, the conventional touch panel 800 has a problem in that the process cost and the material cost are increased because a separate process is required to attach the scattering prevention film 820. In addition, a liquid crystal display module (not shown, LCM) Bar 810 for protecting the bar is made of glass or acrylic material, the shape of the liquid crystal display device can not be variously changed, there is a problem that the safety of the liquid crystal display device is inferior.

An object of the present invention is to provide a touch panel which can omit the scattering prevention film of the touch panel used in the conventional liquid crystal display device.

The object is, according to the present invention, a window portion for protecting a liquid crystal display module (LCM) is formed; And a scattering prevention combined touch coupled to the window portion between the liquid crystal display module and the window portion to input an electrical signal to the liquid crystal display module when the window portion is touched and to prevent scattering of glass fragments when the window portion breaks. It is achieved by a touch panel comprising a pad portion.

The scattering prevention combined touch pad part may be a capacitive scattering preventing touch pad part.

The scattering prevention combined touch pad unit, ITO (Indium-Tin Oxide) coated ITO film; And it may include an electrode printed on the bottom edge of the ITO film.

The ITO film may have an area substantially the same as that of the window portion.

The window portion and the ITO film may be attached to each other by an optical clear adhesive (OCA).

The window unit may further include a printed layer on which a letter or logo is printed.

The scattering prevention combined touch pad unit, ITO coating layer is coated on the lower surface of the window; And it may include an electrode printed on the bottom edge of the ITO coating layer.

The window unit may further include a printed layer on which a letter or logo is printed.

The touch panel may further include a window protection film provided on an upper surface of the window part to protect the window part.

The window protective film may further include a printed layer on which a letter or logo is printed.

The window protective film may be made of a PET (Poly Ethylen Terephthalate) film.

The window portion and the window protection film may be attached to each other by an optical clear adhesive (OCA).

The window portion may be made of tempered glass.

According to the present invention, by providing a touch panel composed of only the window portion and the anti-scattering touch pad portion, it is possible to omit the scattering prevention film of the touch panel used in the conventional liquid crystal display device, and thus the light transmittance of the touch panel This increases and the effect of reducing the thickness of the touch panel is provided.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, in describing the present invention, descriptions of already known functions or configurations will be omitted to clarify the gist of the present invention.

2 is a perspective view of a touch panel according to a first embodiment of the present invention, and FIG. 3 is a side view of the touch panel of FIG. 2.

2 and 3, the touch panel 20 according to the first embodiment of the present invention is coupled to a window portion 210 disposed on one surface of the liquid crystal display and a bottom surface of the window portion 210. It includes a scattering prevention combined use touch pad unit 220.

The window unit 210 is disposed on one surface of the liquid crystal display to protect an LCD display module (not shown, LCM, Liquid Crystal Display Module) in which an image is formed. Is produced by. Here, tempered glass refers to a glass in which molded glass is heated to 500 to 600 ° C. close to a softening temperature, quenched by compressed cooling air to compressively deform the glass surface portion, and then tensilely strained inside to strengthen the glass.

The window portion 210 is made of tempered glass, unlike the liquid crystal display module protection window of the prior art made of acrylic or ordinary glass, it has excellent characteristics in impact resistance, heat resistance and safety. In addition, unlike the prior art in which only glass cutting is permitted, since the shape of the tempered glass may be variously changed by an etching process, holes or holes may be formed in the window portion 210. ) The edges can be formed in a curved shape, which enables various designs of the product.

Referring to FIG. 3, the window 210 further includes a print layer 211 printed on the bottom surface, where the print layer 211 is a portion provided to describe a company logo or a model name of a product. to be. The printing layer of the touch panel according to the prior art is generally printed on the lower surface of the anti-scattering film, but in the case of the first embodiment of the present invention, since the anti-scattering film is omitted, the printed layer 211 of the window portion 210 Printed directly on the bottom.

As such, the touch panel 20 according to the first embodiment of the present invention has the advantage of reducing the overall thickness of the product by the printing layer 211 directly printed on the lower surface of the window 210. Since the thickness of the printed layer 211 is generally very thin, it is omitted in FIG.

On the other hand, the anti-scattering touch pad unit 220 includes an ITO film 221 attached to the lower surface of the window 210, and an electrode 222 printed on the edge of the lower surface of the ITO film 221.

Here, the ITO film 221 refers to a film that conducts electricity and has a transparent property, and ITO refers to a material that is transparent and electrically conductive in short for Indium-Tin Oxide. In general, ITO is coated on a transparent substrate with a thin film by wet coating or dry coating to realize conductivity. In the past, ITO is coated on a glass plate and is widely used for LCD.

2 and 3, a specific type of ITO patterning layer (not shown) may be formed on the ITO film 221 as needed, and an electrode 222 may be formed at an edge of the bottom surface of the ITO film 221. Printed, where electrode 222 is fabricated using silver.

When using the finger or the touch pen to touch the window unit 210 coupled to the anti-scattering touch pad unit 220, more precisely, the anti-scattering touch pad unit 220, the ITO film 221 based on the touch portion. When the isoelectric potential of is destroyed to generate a current, the amount of charge charged as the current flows is sensed through a current sensor (not shown) connected to a silver electrode 222 printed on the edge of the ITO film 221. By detecting the conversion position through an analog-to-digital converter (not shown), an accurate touch position can be recognized.

The anti-scattering touch pad unit 220 is a capacitive type touch pad and thus can be implemented using only one sheet of ITO film 221.

In the touch panel 20 according to the first embodiment of the present invention, first, the damage of the touch panel 20 is prevented by the window 210 made of tempered glass, and then the window 210 is broken. Even in this case, since the fragments of the window portion 210 are prevented from scattering to the user by the ITO film 221 coupled to the window portion 210, the scattering prevention combined use touch pad portion 220 is provided on the window portion 210. It is slightly smaller or has the same area in comparison.

A liquid crystal display module (not shown, LCM, Liquid Crystal Display Module) is coupled to the bottom surface of the anti-scattering touch pad unit 220, and a back light is provided inside the liquid crystal display module (not shown, LCM, Liquid Crystal Display Module). Not shown, Beck Light is included to serve as a light source when the touch panel 20 is used.

2 and 3, the window unit 210 and the scattering prevention combined touch pad unit 220 are attached to each other by an optical clear adhesive (OCA) 60.

Here, the OCA (60, Optical Clear Adhesive) is a transparent adhesive provided to allow the two layers to be stably bonded without lowering the light transmittance of the window portion 210 and the scattering prevention touch pad portion 220. Say the floor.

In the touch panel 20 according to the first embodiment of the present invention, the scattering prevention combined touch pad part 220 and the window part 210 having an area slightly smaller or the same as that of the window part 210 may be OCA 60. By using the optical clear adhesive (Coupling), it is possible to omit the scattering prevention film of the prior art, thereby improving the light transmittance of the touch panel 20 and not only reduce the overall thickness of the touch panel 20 By omitting the process of attaching the anti-scattering film, the process cost and material cost can be reduced.

4 is a side view of a touch panel according to a second embodiment of the present invention.

Referring to FIG. 4, the touch panel 30 according to the second exemplary embodiment of the present invention may include a window portion 310 disposed on one surface of the liquid crystal display device and a scattering prevention combined with the lower surface of the window portion 310. The touch pad unit 320 is included.

The window part 310 is disposed on one surface of the liquid crystal display and is provided to protect the liquid crystal display module in which an image is formed. In this embodiment, the window part 310 is made of tempered glass having a flat plate shape.

Unlike the prior art, since the window 310 according to the present embodiment is made of tempered glass, it has excellent characteristics in impact resistance, heat resistance, and safety, and unlike the prior art in which only glass cutting is permitted, etching is performed. ) The shape of the tempered glass can be variously changed by the process.

The lower surface of the window 310 is provided with a printing layer 311, which is described the company's logo or product model name, the printing layer 311 is a window portion 310 in the state of omitting a scattering prevention film, unlike the prior art Since it is directly printed on the lower surface of the can reduce the thickness of the touch panel (30).

The anti-scattering touch pad part 320 includes an ITO coating layer 321 coated on the bottom surface of the window 310 on which the printing layer 311 is printed, and an electrode 322 printed on the bottom edge of the ITO coating layer 321. ).

In addition, an ITO patterning layer (not shown) having a specific pattern may be formed on the ITO coating layer 321 of the anti-scattering touch pad part 320, and the electrode 322 may be formed as described above. Likewise, it is manufactured using silver.

The method of coating the ITO coating layer 321 on the window portion 310 made of tempered glass follows a dry coating process such as vacuum deposition, sputtering, CVD, ion plating, or the like.

A liquid crystal display module (not shown, LCM, Liquid Crystal Display Module) in which an image is formed according to an external input by the touch panel 30 is attached to the bottom surface of the electrode 322 by OCA (Optical Clear Adhesive). In addition, a case (not shown) of a product is attached to an external appearance of a liquid crystal display module (LCM, Liquid Crystal Display Module).

In the touch panel 30 according to the second embodiment of the present invention, first, the breakage of the touch panel 30 is prevented by the window portion 310 made of tempered glass, and then the window portion 310 is broken. Even in this case, the debris of the window 310 is scattered to the user by a liquid crystal display module (not shown, LCM, Liquid Crystal Display Module) and a case (not shown) attached by OCA (Optical Clear Adhesive). Can be prevented.

In addition, since the touch panel 30 according to the second embodiment of the present invention can omit the step of attaching the anti-scattering film, the process cost and material cost are reduced, and the light transmittance of the liquid crystal display device is improved. This has the advantage of reducing the overall thickness of the touch panel 30.

5 is a side view of a touch panel according to a third embodiment of the present invention.

Referring to FIG. 5, the touch panel 40 according to the third embodiment of the present invention includes a window unit 410 disposed on one surface of the liquid crystal display and a scattering prevention combined with the bottom surface of the window unit 410. The touch pad part 420 and the window protection film 430 provided on the upper surface of the window part 410 are included.

The window unit 410 is disposed on one surface of the liquid crystal display and is provided to protect the liquid crystal display module in which an image is formed. The window unit 410 is made of tempered glass in a flat shape.

Unlike the prior art, the window 410 according to the third embodiment of the present invention is made of tempered glass, and thus has excellent characteristics in impact resistance, heat resistance, and safety, and unlike the prior art in which only glass cutting is permitted. Since the shape of the tempered glass can be variously changed by an etching process, various designs of the product are possible.

The anti-scattering touch pad part 420 includes an ITO coating layer 421 coated on the lower surface of the window 410, and an electrode 422 printed on an edge of the lower surface of the ITO coating layer 421.

In addition, an ITO patterning layer (not shown) having a specific pattern may be formed on the ITO coating layer 421 of the anti-scattering touch pad part 420, and the electrode 422 may be formed as described above. Like the first embodiment and the second embodiment, it is manufactured using silver.

The method of coating the ITO coating layer 421 on the window portion 410 made of tempered glass follows a dry coating process such as vacuum deposition, sputtering, CVD, and ion plating.

A liquid crystal display module (not shown, LCM, Liquid Crystal Display Module) in which an image is formed according to an external input by the touch panel 30 is attached to the lower surface of the electrode 422 by an optical clear adhesive (OCA). The case (not shown) of the product is attached to the exterior of the module (not shown, LCM, Liquid Crystal Display Module).

Window protection film 430 is configured to be coupled to the upper surface of the window 410 in order to prevent the window unit 410 from being damaged by an external impact, it is produced using a general PET (Poly Ethylen Terephthalate) film, It further includes a printed layer 431 printed on the lower surface.

The printing layer 431 includes information such as a company logo or a product name, and in this case, the printing layer 311 directly printed on the lower surface of the window 310 in the second embodiment of the present invention is omitted.

A liquid crystal display module (not shown, LCM, Liquid Crystal Display Module) in which an image is formed according to an external input by the touch panel 40 is attached to the lower surface of the electrode 422 by an optical clear adhesive (OCA). The case (not shown) of the product is attached to the exterior of the module (not shown, LCM, Liquid Crystal Display Module).

Since the touch panel 40 according to the third embodiment of the present invention can omit the step of attaching the anti-scattering film, the process cost and material cost are reduced, and the light transmittance of the liquid crystal display device is improved. It has an advantage of reducing the overall thickness of the touch panel 40.

In addition, the touch panel 40 according to the third embodiment of the present invention, by the window protection film 430 to be able to block the debris scattered when the window unit 410 is broken once again to enhance the safety of the user Has an advantage.

While specific embodiments of the invention have been described and illustrated above, it is to be understood that the invention is not limited to the described embodiments, and that various modifications and changes can be made without departing from the spirit and scope of the invention. It is self-evident to those who have. Therefore, such modifications or variations are not to be understood individually from the technical spirit or point of view of the present invention, the modified embodiments will belong to the claims of the present invention.

1 is a side view of a capacitive type touch panel according to the prior art.

2 is a perspective view of a touch panel according to a first embodiment of the present invention.

3 is a side view of the touch panel of FIG. 2.

4 is a side view of a touch panel according to a second embodiment of the present invention.

5 is a side view of a touch panel according to a third embodiment of the present invention.

* Description of the symbols for the main parts of the drawings *

20,30,40: Touch panel 60: OCA (Optical Clear Adhesive)

210, 310, 410: window portion 220, 320, 420: scattering touch pad unit

221: ITO film 321,421: ITO coating layer

222,322,422 electrode 211,311,431 printed layer

430 window protective film

Claims (13)

A window unit which protects the liquid crystal display module (LCM) on which an image is formed; And Coupled to the window portion between the liquid crystal display module and the window portion, an electric signal is input to the liquid crystal display module when the window portion is touched, and a capacitive scattering method prevents scattering of glass fragments when the window portion breaks. It includes a prevention combined touch pad, The scattering prevention combined touch pad unit, ITO film coated with Indium-Tin Oxide (ITO); And A touch panel comprising an electrode printed on the bottom edge of the ITO film. delete delete The method of claim 1, And the ITO film has an area substantially the same as that of the window portion. The method of claim 1, The window unit and the ITO film is a touch panel, characterized in that attached to each other by an optical clear adhesive (OCA). The method of claim 1, The window unit further comprises a print layer on which a letter or logo is printed on the bottom surface. A window unit which protects the liquid crystal display module (LCM) on which an image is formed; And Coupled to the window portion between the liquid crystal display module and the window portion, an electric signal is input to the liquid crystal display module when the window portion is touched, and a capacitive scattering method prevents scattering of glass fragments when the window portion breaks. It includes a prevention combined touch pad, The scattering prevention combined touch pad unit, An ITO coating layer coated on the lower surface of the window part; And A touch panel comprising an electrode printed on the bottom edge of the ITO coating layer. The method of claim 7, wherein The window unit further comprises a print layer on which a letter or logo is printed on the bottom surface. The method of claim 7, wherein And a window protection film provided on an upper surface of the window part to protect the window part. The method of claim 9, The window protective film is a touch panel, characterized in that it further comprises a print layer is printed on the lower surface. The method of claim 9, The window protective film is a touch panel, characterized in that made of PET (Poly Ethylen Terephthalate) film. The method of claim 9, The window unit and the window protective film is a touch panel, characterized in that attached to each other by an optical clear adhesive (OCA). The method according to claim 1 or 7, The window unit is characterized in that the touch panel is made of tempered glass.

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