KR102238807B1 - Touch window - Google Patents

Abstract

The touch window according to the embodiment includes a substrate; A first sensing electrode and a second sensing electrode disposed on the substrate and extending in different directions; And a connection electrode connecting at least one of the first detection electrode and the second detection electrode, wherein the connection electrode includes a first connection electrode and a second connection electrode, and the first connection electrode and the second detection electrode The second connection electrode includes different materials.

Description

Touch window {TOUCH WINDOW}

The present description relates to a touch window.

Recently, in various electronic products, a touch panel for inputting an image displayed on a display device by contacting an input device such as a finger or a stylus has been applied.

The touch panel may be typically divided into a resistive type touch panel and a capacitive type touch panel. When a pressure is applied to an input device, a resistive touch panel detects a change in resistance according to a connection between electrodes, and a position is detected. The capacitive touch panel detects a change in capacitance between electrodes when a finger touches it and detects a position. In view of the convenience and sensing power of the manufacturing method, the capacitive method has recently attracted attention in small models.

In such a touch panel, in order to reduce the thickness and improve the optical characteristics, a touch panel using a bridge electrode is in the spotlight. However, as the size of the touch panel increases, the pattern length of the connection electrode becomes longer, and the resistance value increases accordingly, so that the sensing ability decreases.

In an embodiment, it is intended to provide a touch panel that can improve reliability and characteristics.

The touch window according to the embodiment includes a substrate; A first sensing electrode and a second sensing electrode disposed on the substrate and extending in different directions; And a connection electrode connecting at least one of the first detection electrode and the second detection electrode, wherein the connection electrode includes a first connection electrode and a second connection electrode, and the first connection electrode and the second detection electrode The second connection electrode includes different materials.

In the touch window according to the embodiment, connection electrodes connecting the sensing electrodes may be disposed in two or more layers including different materials. That is, by additionally disposing a material having high conductivity, it is possible to reduce the resistance of the connection portion of the sensing electrode, that is, the connection electrode.

Accordingly, the touch window according to the embodiment may improve electrical characteristics and thus may have improved efficiency.

In addition, since the connection electrodes are arranged in two or more layers, even if a short circuit occurs in one connection electrode, the sensing electrode can be connected through the other connection electrode, thereby preventing a defect due to a short circuit of the connection electrode.

Accordingly, the touch window according to the embodiment can reduce defects of the touch window and thus have improved reliability.

1 is a perspective view of a touch window according to an exemplary embodiment.
2 is a plan view of a touch window according to an exemplary embodiment.
3 is an enlarged plan view of A of FIG. 2.
4 is a cross-sectional view illustrating a cross-section taken along line B-B' of FIG. 3.
5 and 6 are exploded perspective views of a touch window according to another embodiment.
7 is a diagram illustrating a plan view of FIG. 5.
8 to 11 are diagrams illustrating examples of a touch device apparatus to which a touch window according to embodiments is applied.

In the description of the embodiments, each layer (film), region, pattern, or structure is "on" or "under" of the substrate, each layer (film), region, pad, or patterns. The description that "is formed in" includes all that are formed directly or through another layer. The standards for the top/top or bottom/bottom of each layer will be described based on the drawings.

In the drawings, the thickness or size of each layer (film), region, pattern, or structure may be modified for clarity and convenience of description, and thus the actual size is not entirely reflected.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 to 4, a touch window according to an embodiment may include a substrate 100, a sensing electrode 200, a wiring electrode 300, and a printed circuit board 700.

The substrate 100 may support the sensing electrode 200, the wiring electrode 300, and the printed circuit board 700.

The substrate 100 may include glass or plastic. For example, the substrate 100 may include chemically strengthened glass such as soda lime glass or aluminosilicate glass, or may include plastic such as polyethylene terephthalate (PET).

An effective area AA and a non-effective area UA may be defined on the substrate 100.

A display may be displayed in the effective area AA, and the display may not be displayed in the ineffective area UA disposed around the effective area AA.

In addition, the position of the input device (eg, a finger, etc.) may be sensed in at least one of the effective area AA and the non-effective area UA. When an input device such as a finger comes into contact with such a touch panel, a difference in capacitance occurs at a portion where the input device is in contact, and a portion where the difference occurs may be detected as a contact position.

A printing layer 400 may be disposed in the ineffective area UA. The printed layer 400 makes it possible to prevent externally recognized wiring electrodes or the like disposed on the ineffective area UA. The printing layer 400 may be formed by applying ink such as black or white.

The sensing electrode 200 may be disposed on the substrate 100. In detail, the sensing electrode 200 may be disposed on the effective area AA of the substrate 100.

The sensing electrode 200 may include a conductive material. For example, the sensing electrode 200 may include a transparent conductive material so that electricity can flow without interfering with the transmission of light. For example, the sensing electrode 200 is indium tin oxide. , Metal oxides such as indium zinc oxide, copper oxide, tin oxide, zinc oxide, and titanium oxide.

However, embodiments are not limited thereto, and the sensing electrode 200 may include a nanowire, a photosensitive nanowire film, a carbon nanotube (CNT), graphene, or a conductive polymer.

Alternatively, the sensing electrode 300 may include various metals. For example, the sensing electrode 300 may contain at least one metal of chromium (Cr), nickel (Ni), copper (Cu), aluminum (Al), silver (Ag), molybdenum (Mo), and alloys thereof. The sensing electrode 200 may include a first sensing electrode 210 and a second sensing electrode 220.

The first sensing electrode 210 may be disposed on the effective area AA of the substrate 100 while extending in a first direction. In detail, the first sensing electrode 210 may be disposed on one surface of the substrate 100.

In addition, the second sensing electrode 220 may be disposed on the effective area AA of the substrate 100 while extending in a second direction. In detail, the second sensing electrode 220 may be disposed on one surface of the substrate 100 while extending in the second direction, which is a direction different from the first direction. That is, the first sensing electrode 210 and the second sensing electrode 220 may extend and be disposed in different directions on the same surface of the substrate 100.

The first sensing electrode 210 and the second sensing electrode 220 may be insulated from each other and disposed on the substrate 100.

In addition, at least one of the first sensing electrode 210 and the second sensing electrode 220 may be connected by a connection electrode 230.

For example, referring to FIGS. 2 to 4, the first sensing electrodes 210 are connected to each other, extending in a first direction, and disposed, and the second sensing electrodes 220 are connected to the connection electrode 230. Are connected to each other, and may be disposed to extend in a second direction different from the first direction.

Referring to FIG. 4, a first sensing electrode 210 and a second sensing electrode 220 are disposed on one surface of an effective area of the substrate 100, and the first sensing electrode 210 and the second sensing electrode are An insulating layer 250 may be disposed on the electrode 220.

Holes may be formed in the insulating layer 250. In detail, a hole H may be formed in the insulating layer 250, and the second sensing electrode 220 may be exposed through the hole H.

The connection electrode 230 may be disposed on the insulating layer 250. The connection electrode 230 may electrically connect second sensing electrodes 220 spaced apart from each other through the hole H.

The connection electrode 230 may include a first connection electrode 231 and a second connection electrode 232. In detail, the connection electrode 230 may include a first connection electrode 231 disposed on the insulating layer 250 and a second connection electrode 232 disposed on the first connection electrode 231. have.

The first connection electrode 231 and the second connection electrode 232 may include different materials. In addition, the first connection electrode 231 and the second connection electrode 232 may include a conductive material.

The first connection electrode 231 may include the same material as the sensing electrode 200. In detail, the first connection electrode 231 may include the same material as the second sensing electrode 200.

For example, the first connection electrode 231 may include a transparent conductive material. For example, the first connection electrode 231 is indium tin oxide, indium zinc oxide, copper oxide, tin oxide, and zinc oxide. , It may include a metal oxide such as titanium oxide (titanium oxide).

In addition, the second connection electrode 232 may include a material different from that of the first connection electrode 231. In detail, the second connection electrode 232 may include a material different from at least one of the first connection electrode 231 and the sensing electrode 200.

For example, the second connection electrode 232 may include a metal. For example, the second connection electrode 232 includes at least one of chromium (Cr), nickel (Ni), copper (Cu), aluminum (Al), silver (Ag), molybdenum (Mo), and alloys thereof. It may contain a metal.

The second connection electrode 232 may have a mesh shape. For example, the second connection electrode 232 may include a first mesh line and a second mesh line crossing each other, and may have a mesh shape as a whole.

The first connection electrode 231 and the second connection electrode 232 may be disposed in the same or different widths. In detail, the width of the first connection electrode 231 and the width of the second connection electrode 232 may be the same, or the first connection electrode 231 may be greater than the width of the second connection electrode 232. have.

For example, the width of the first connection electrode 231 may be about 100 μm to about 500 μm. In addition, the second connection electrode 232 may be about 500 μm or less.

In addition, the thicknesses of the first connection electrode 231 and the second connection electrode 232 may be different from each other. Specifically, the thickness of the first connection electrode 231 is May be smaller than the thickness.

For example, the thickness of the first connection electrode 231 may be about 1 μm or less. In addition, the thickness of the second connection electrode 232 may be about 10 μm or less.

In the touch window according to the embodiment, connection electrodes connecting the sensing electrodes may be disposed in two or more layers including different materials. That is, by additionally disposing a material having high conductivity, it is possible to reduce the resistance of the connection portion of the sensing electrode, that is, the connection electrode.

Accordingly, the touch window according to the embodiment may improve electrical characteristics and thus may have improved efficiency.

In addition, since the connection electrodes are arranged in two or more layers, even if a short circuit occurs in one connection electrode, the sensing electrode can be connected through the other connection electrode, thereby preventing a defect due to a short circuit of the connection electrode.

Accordingly, the touch window according to the embodiment can reduce defects of the touch window and thus have improved reliability.

In FIG. 1, the sensing electrode 200 and the wiring electrode 300 are disposed on the substrate 100, but embodiments are not limited thereto, and a cover substrate may be further disposed on the substrate 100. .

Alternatively, the substrate 100 itself may be a cover substrate, and a sensing electrode 200 and a wiring electrode 300 may be disposed on the cover substrate.

The wiring electrode 300 may be disposed on the non-effective area UA of the substrate 100. In detail, the wiring electrode 300 may be disposed on the printed layer 400. The wiring electrode 300 is connected to the sensing electrode 200 and may be disposed on the printed layer 400.

The wiring electrode 300 may include a first wiring electrode 310 and a second wiring electrode 320. In detail, the wiring electrode 300 may include a first wiring electrode 310 connected to the first sensing electrode 210 and a second wiring electrode 220 connected to the second sensing electrode 320. have.

One end of the first wiring electrode 310 and the second wiring electrode 320 may be connected to the sensing electrode 200, and the other end may be connected to the printed circuit board 700.

The wiring electrode 300 may include a conductive material. In detail, the wiring electrode 300 may include the same material as the sensing electrode 200.

The wiring electrode 300 may be connected to the sensing electrode 200 on the printed layer 400. In detail, the sensing electrode 200 and the wiring electrode 300 may directly or indirectly contact each other.

The wiring electrode 300 receives a touch signal sensed from the sensing electrode 200, and the touch signal is a printed circuit board 700 electrically connected to the wiring electrode 300 through the wiring electrode 300. ) May be transferred to the driving chip 710 mounted on it.

The printed circuit board 700 may be disposed on the ineffective area UA. The printed circuit board 700 may be a flexible printed circuit board (FPCB). The printed circuit board 700 may be connected to the wiring electrode 300 disposed on the ineffective area UA. In detail, the printed circuit board 600 may be connected to the wiring electrode 300 on the ineffective area UA. The electrode 300 may be electrically connected to the anisotropic conductive film (ACF).

A driving chip 710 may be mounted on the printed circuit board 700. In detail, the driving chip 710 may receive a touch signal sensed from the sensing electrode 200 from the wiring electrode 300 and perform an operation according to the touch signal.

Hereinafter, a touch window according to another exemplary embodiment will be described with reference to FIGS. 5 to 8.

Referring to FIG. 5, a touch window according to another embodiment includes a first substrate 110, a second substrate 120, a third substrate 130, a first sensing electrode 210, and a second sensing electrode 220. , A first wiring electrode 310 and a second wiring electrode 320 may be included.

The second substrate 120 may be disposed on the first substrate 110. A first sensing electrode 210 and a first wiring electrode 310 may be disposed on the second substrate 120.

The third substrate 130 may be disposed on the second substrate 130. A second sensing electrode 220 and a second wiring electrode 320 may be disposed on the third substrate 130.

The first substrate 110, the second substrate 120, and the third substrate 130 may be bonded through an adhesive layer. For example, the first substrate 110 and the second substrate 120 ) And the third substrate 130 may be adhered to each other through an optical clear adhesive (OCA).

Referring to FIG. 6, a touch window according to another embodiment includes a first substrate 110, a second intermediate layer 500, a second substrate 120, a first sensing electrode 210, and a second sensing electrode 220. , A first wiring electrode 310 and a second wiring electrode 320 may be included.

The intermediate layer 500 may be disposed on the first substrate 110. A first sensing electrode 210 and a first wiring electrode 310 may be disposed on the intermediate layer 500.

The intermediate layer 400 may include a dielectric material.

For example, the intermediate layer 400 is an insulator-based, alkali metal or alkaline earth metal halogen compound such as LiF, KCI, CaF2, MgF2, or fused silica, SiO2, SiNX, and the like; InP, InSb, etc. as a semiconductor series; As a transparent oxide used for semiconductors or dielectrics, In compounds mainly used for transparent electrodes such as ITO and IZO, or transparent oxides used for semiconductors or dielectrics of ZnOx, ZnS, ZnSem TiOx, WOx, ReOx, etc.; Alq3, NPB, TAPC, 2TNATAm CBP, Bphen, etc. as an organic semiconductor series; Silsesquioxane (silsesquioxane) Ehsms rm derivative (hydrogen-silsesquioxane (H-SiO3/2)n), methyl-silsesquioxane (CH3-SiO3/2)n), porous silica or Porous silica doped with fluorine or carbon atoms, porous ZnOx, fluorine-substituted polymer compounds (CYTOP), or mixtures thereof may be included. The intermediate layer 400 may have a visible light transmittance of 75% to 99%.

The second substrate 120 may be disposed on the intermediate layer 400. A second sensing electrode 220 and a second wiring electrode 320 may be disposed on the second substrate 120.

The first substrate 110, the second substrate 120, and the intermediate layer 400 may be adhered through an adhesive layer, for example, the first substrate 110, the second substrate 120, and The intermediate layers 400 may be adhered to each other through an optical clear adhesive (OCA). Referring to FIG. 7, the first sensing electrode 210 and the second sensing electrode 220 are sensed. It may include connection parts 230 connecting the electrode patterns to each other. As described above, the connecting portions are disposed in two or more layers, and each layer may include a different material.

Since the description of the connection part is the same as the connection electrode described above, the following description will be omitted.

The touch window according to the above-described embodiments may be applied to a touch device in combination with a driver.

For example, the touch window according to the embodiments may be applied to a touch device in combination with a driver including a display panel or the like.

The driving unit may include a light module and a liquid crystal panel.

The light module may include a light source that emits light toward the liquid crystal panel. For example, the light source may include a light emitting diode (LED) or an organic light emitting diode (OLED).

The liquid crystal panel may include a plurality of liquid crystal elements. These liquid crystal devices may have a certain pattern of directionality because the arrangement of internal molecules is changed according to an electrical signal applied from the outside.

The driver may refract the lights in different patterns while the light emitted from the light module passes through the liquid crystal panel 520.

The touch window may be disposed on the driving unit. In detail, the touch window may be accommodated in a cover case and disposed on the driving unit. The touch window may be bonded to the driving unit. In detail, the touch panel and the driving unit may be adhered to each other through an optical clear adhesive (OCA) or the like.

8 to 11 are diagrams illustrating an example of a touch device apparatus including the touch panel described above.

Referring to FIG. 8, the mobile terminal 1000 may include an effective area AA and an invalid area UA. The effective area AA may sense a touch signal by a touch such as a finger, and a command icon pattern part and a logo may be formed in the ineffective area.

Further, referring to FIG. 9, as an example of a display device, a portable notebook is shown. The portable notebook 2000 may include a touch panel 2200, a touch sheet 2100, and a circuit board 2300. A touch sheet 2100 is disposed on the upper surface of the touch panel 2200. The touch sheet 2100 may protect the touch area TA. In addition, the touch sheet 2100 may improve a user's touch feeling. In addition, a circuit board 2300 electrically connected to the touch panel 2200 is included on a lower surface of the touch panel 2200. The circuit board 2300 is a printed circuit board, and various components for configuring a portable notebook may be mounted.

In addition, referring to FIG. 10, such a touch panel may be applied to the vehicle navigation 3000. In addition, referring to FIG. 11, such a touch panel may be applied to a vehicle. That is, the touch window can be applied to various parts in the vehicle to which the touch window can be applied. Therefore, it is applied to not only a PND (Personal Navigation Display), but also an instrument panel (dashboard) to implement a CID (Center Information Display). However, the embodiment is not limited thereto, and of course, such a touch panel may be used in various electronic products.

Features, structures, effects, and the like described in the above-described embodiments are included in at least one embodiment of the present invention, and are not necessarily limited to only one embodiment. Further, the features, structures, effects, etc. illustrated in each embodiment may be combined or modified for other embodiments by a person having ordinary knowledge in the field to which the embodiments belong. Therefore, contents related to such combinations and modifications should be construed as being included in the scope of the present invention.

In addition, although the embodiments have been described above, these are only examples and do not limit the present invention, and those of ordinary skill in the field to which the present invention pertains are illustrated above without departing from the essential characteristics of this embodiment. It will be seen that various modifications and applications that are not available are possible. For example, each component specifically shown in the embodiments can be modified and implemented. And differences related to these modifications and applications should be construed as being included in the scope of the present invention defined in the appended claims.

Claims (12)

Board;
A first sensing electrode and a second sensing electrode disposed on the substrate and extending in different directions;
A connection electrode connecting at least one sensing electrode of the first sensing electrode and the second sensing electrode,
The connection electrode includes a first connection electrode and a second connection electrode,
The first connection electrode and the second connection electrode contain different materials,
The first connection electrode is indium tin oxide, indium zinc oxide, copper oxide, tin oxide, zinc oxide, or titanium oxide. ),
The second connection electrode includes at least one of chromium (Cr), nickel (Ni), copper (Cu), aluminum (Al), silver (Ag), molybdenum (Mo), and alloys thereof,
The second connection electrode is formed in a mesh shape by a first mesh line and a second mesh line crossing each other,
The thickness of the first connection electrode is smaller than the thickness of the second connection electrode,
The thickness of the first connection electrode is 1 μm or less,
The second connection electrode has a thickness of 10 μm or less. The method of claim 1,
Further comprising an insulating layer disposed on the first sensing electrode and the second sensing electrode,
The first connection electrode is disposed on the insulating layer,
The second connection electrode is a touch window disposed on the first connection electrode. The method of claim 1,
The width of the first connection electrode is different from the width of the second connection electrode. The method of claim 3,
The width of the first connection electrode is greater than or equal to the width of the second connection electrode. The method of claim 4,
The width of the first connection electrode is 100㎛ to 500㎛,
The width of the second connection electrode is 500㎛ or less touch window. The method of claim 1,
The first sensing electrode and the second sensing electrode are disposed on the same surface of the substrate. Driving unit; And
A touch device device comprising the touch window according to any one of claims 1 to 6 disposed on the driving unit. delete delete delete delete delete

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