KR20110092768A - Touch screen panel - Google Patents

Abstract

PURPOSE: A touch screen panel is provided to reduce the thickness and a manufacturing cost of a touch screen panel by omitting an upper polarizing plate. CONSTITUTION: A conductive line is formed in the top of a substrate. A wire grid polarizer(60) includes a first and a second lower electrodes. An upper electrode(90) is formed on the wire grid polarizer. The substrate includes an ITO(Indium Tin Oxide) transparent substrate. The conductive wire includes a transparent ITO conductive wire. The upper electrode includes an ITO transparent film.

Description

Touch screen panel {Touch Screen Panel}

The present invention relates to a touch screen panel.

In general, a touch screen refers to a device capable of contacting a person's hand or an object with a character or a specific location displayed on the screen by an image display device without using a keyboard to identify the location and performing specific processing by stored software. . Such touch screens include a capacitive type, a resistive film type, an infrared sensing type, and the like, and are widely used in display devices requiring characteristics of light and thin.

On the other hand, the touch screen is generally provided with a touch screen panel for detecting the position of the object. In the case of the touch screen panel formed on the back of the on cell color filter substrate, the ITO lower electrode, the outer lead bonding (OLB) metal pad, the ITO upper electrode, and the upper polarizer are sequentially formed on the rear of the substrate. It is common to form a so that the manufacturing process is somewhat complicated. Therefore, there is a disadvantage in that the manufacturing process is long and the manufacturing cost is also increased.

The technical problem to be solved by the present invention is to provide a touch screen panel with a simplified manufacturing process and reduced manufacturing cost.

Technical problems of the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned will be clearly understood by those skilled in the art from the following description.

One aspect of a touch screen panel of the present invention for achieving the above technical problem is a substrate, a plurality of conductive wires formed on the substrate, and the first lower electrode formed by binding at least two conductive wires of the plurality of conductive wires And a wire grid polarizer comprising an upper electrode formed on the wire grid polarizer.

Another aspect of the touch screen panel of the present invention for achieving the above technical problem, a color filter substrate made of ITO, a plurality of conductive wires formed of ITO extending in a first direction on the color filter substrate, a plurality of conductive A wire grid polarizer comprising a first lower electrode formed by binding at least two conductive wires of the wires and a second lower electrode formed by binding at least two conductive wires of the plurality of conductive wires, an OLB pad formed by being connected to the wire grid polarizer, A plurality of column spacers formed on the wire grid polarizer, and extending on the column spacer in a second direction perpendicular to the first direction, and comprises an upper electrode made of an ITO transparent film.

Specific details of other embodiments are included in the detailed description and the drawings.

1 is a schematic cross-sectional view of a touch screen panel according to an embodiment of the inventive concept.
2 is a perspective view illustrating a wire grid polarizer of a touch screen panel according to an exemplary embodiment of the present invention.
3 and 4 are views for explaining the relationship between the conductive wire and the upper electrode of the touch screen panel.

Advantages and features of the present invention and methods for achieving them will be apparent with reference to the embodiments described below in detail with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in various forms, and only the present embodiments are intended to complete the disclosure of the present invention, and the general knowledge in the art to which the present invention pertains. It is provided to fully convey the scope of the invention to those skilled in the art, and the present invention is defined only by the scope of the claims. The size and relative size of the components shown in the drawings may be exaggerated for clarity of explanation.

When elements or layers are referred to as "on" or "on" of another element or layer, intervening other elements or layers as well as intervening another layer or element in between. It includes everything. On the other hand, when a device is referred to as "directly on" or "directly on", it means that no device or layer is intervened in the middle.

Like reference numerals refer to like elements throughout the specification, and "and / or" includes each and every combination of one or more of the mentioned items.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. In the present specification, the singular form includes plural forms unless otherwise specified in the specification. As used herein, the terms "comprises" and / or "made of" means that a component, step, operation, and / or element may be embodied in one or more other components, steps, operations, and / And does not exclude the presence or addition thereof.

Embodiments described herein will be described with reference to plan and cross-sectional views, which are ideal schematic diagrams of the invention. Accordingly, shapes of the exemplary views may be modified by manufacturing techniques and / or tolerances. Accordingly, the embodiments of the present invention are not limited to the specific forms shown, but also include variations in forms generated by the manufacturing process. Thus, the regions illustrated in the figures have schematic attributes, and the shape of the regions illustrated in the figures is intended to illustrate a particular form of region of the device, and is not intended to limit the scope of the invention.

Unless otherwise defined, all terms (including technical and scientific terms) used in the present specification may be used in a sense that can be commonly understood by those skilled in the art. In addition, the terms defined in the commonly used dictionaries are not ideally or excessively interpreted unless they are specifically defined clearly.

Hereinafter, a touch screen panel according to an embodiment of the inventive concept will be described with reference to FIGS. 1 to 4.

1 is a schematic cross-sectional view of a touch screen panel according to an embodiment of the present invention, and FIG. 2 is a view illustrating a wire grid polarizer of a touch screen panel according to an embodiment of the present invention. Perspective view. 3 and 4 are diagrams for describing a relationship between a conductive wire and an upper electrode of a touch screen panel.

First, referring to FIG. 1, the touch screen panel includes a backlight unit 10, a lower polarizer 20, a TFT substrate 30, a liquid crystal layer 40, a color filter substrate 50, a wire grid polarizer 60, The adhesive member 70 may include an upper electrode 90, a column spacer 80, and an optically isotropic film 100.

The backlight unit 10 may serve to supply light, including a light source, for example, a lamp. The backlight unit 10 may be classified into a direct type and an edge type according to the lamp arrangement. For example, the backlight unit 10 may be a cold cathode fluorescent lamp (CCFL) or an external electrofluorescent lamp (EEFL). have.

The lower polarizer 20 may be formed on the backlight unit 10 as shown in FIG. 1. The lower polarizer 20 may change the light incident from the backlight unit 10 into linearly polarized light.

Meanwhile, a viewing angle compensation film (not shown) may be formed in the lower polarizing plate 20 of the touch screen panel according to an embodiment of the inventive concept to improve viewing angle characteristics.

The TFT substrate 30 may be formed on the lower polarizer 20. The TFT substrate 30 may be made of a non-conductive material, for example, a material such as glass or ceramic, and a thin film transistor (not shown) for controlling the liquid crystals 41 formed on the TFT substrate 30 may be formed. .

The color filter substrate 50 may be formed on the TFT substrate 30, and the liquid crystal layer 40 including the plurality of liquid crystals 41 may be formed between the TFT substrate 30 and the color filter substrate 50. have. Although not shown, a viewing angle compensation film (not shown) may be formed on the color filter substrate 50 of the touch screen panel according to an embodiment of the inventive concept to improve viewing angle characteristics.

In this case, the color filter substrate 50 of the touch screen panel according to an embodiment of the inventive concept may be, for example, a transparent substrate made of indium tin oxide (ITO) or indium zinc oxide (IZO). . Therefore, the color filter substrate 50 may have conductivity and may have a property of transmitting incident light.

On the color filter substrate 50, a wire grid polarizer 60 including a plurality of conductive wires 61 and a first lower electrode 62 formed by binding at least two conductive wires 61 of the plurality of conductive wires 61. ) May be formed.

This will be described in more detail with reference to FIG. 2.

Referring to FIG. 2, at least two or more of the plurality of conductive wires 61 and the plurality of conductive wires 61 are formed on the color filter substrate 50 and extend in a first direction (for example, the X direction). For example, as illustrated in FIG. 2, three conductive wires 61 are bundled to form a first lower electrode 62, and a conductive wire forming a first lower electrode 62 of the plurality of conductive wires 61. 61 and a wire grid polarizer comprising a second lower electrode 63 formed by binding at least two or more (for example, three as shown in FIG. 2) conductive wires 61 ( 60) can be formed. Here, the plurality of conductive wires 61 may be formed through, for example, metal nano printing or photo lithography.

The conductive wire 61 may be, for example, an ITO material or an IZO transparent wire, similarly to the color filter substrate 50. Therefore, the first lower electrode 62 and the second lower electrode 63 formed by bundle of at least two conductive wires 61, at least two conductive wires 61 may have conductivity, and transmit the incident light. Can have That is, the first lower electrode 62 and the second lower electrode 63 may serve as lower electrodes of a conventional ITO or IZO material that are not composed of a plurality of conductive wires 61. As such, the first lower electrode 62 and the second lower electrode 63 may be formed by binding the at least two conductive wires 61 to prevent open defects of the conductive wires that may occur in the future.

Meanwhile, at least two conductive wires 61 may be formed between the first lower electrode 62 and the second lower electrode 63. That is, the first lower electrode 62 and the second lower electrode 63 may be formed to be spaced apart by at least two conductive wires 61. The spacing between the first lower electrode 62 and the second lower electrode 63 is to prevent short defects in the conductive wires that may occur in the future.

While the wire grid polarizer 60 is formed, an outer lead bonding pad (OLB) pad 110 may be formed at the same time. Specifically, for example, the OLB pad 110 may be connected to the wire grid polarizer 60 and formed as shown in FIG. 2.

Referring back to FIG. 1, an upper electrode 90 may be formed on the wire grid polarizer 60 at a predetermined interval, and a plurality of column spacers 80 may be formed between the wire grid polarizer 60 and the upper electrode 90. And an adhesive member 70 may be formed. The light isotropic film 100 may be formed on the upper electrode 90.

The column spacer 80 may be formed to maintain a gap between the wire grid polarizer 60 and the upper electrode 90, the height of which is smaller than the gap between the wire grid polarizer 60 and the upper electrode 90. It may be formed to have. Although the column spacer 80 is shown in a hemispherical shape in FIG. 1, the present invention is not limited thereto and may have other shapes such as a circular column.

The adhesive member 70 may serve to bond the wire grid polarizer 60 and the upper electrode 90. The adhesive member 70 may be formed in a quadrangular shape as shown in FIG. 1, but the present invention is not limited thereto, and may have another shape such as a circular column.

The upper electrode 90 may be formed of a transparent conductive material, for example, ITO or IZO. The upper electrode 90 and the wire grid polarizer 60 may be formed to face each other and may be used to recognize the position of the touched object as shown in FIG. 1.

The relationship between the wire grid polarizer 60 and the upper electrode 90 formed spaced apart from each other by a predetermined interval will be described in more detail with reference to FIGS. 3 and 4.

3 and 4, the formation direction of the conductive wire 61 of the wire grid polarizer 60 according to the exemplary embodiment of the present invention may be determined according to the liquid crystal 41 mode.

Specifically, when the liquid crystal mode of the liquid crystal 41 is, for example, PVA or IPS mode, the conductive wire 61, the first lower electrode 62, and the second lower electrode 63 are as shown in FIG. 3. Likewise, it may be formed to extend in a first direction (for example, X direction), and the upper electrode 90 extends in a second direction (for example, Y direction) perpendicular to the first direction (for example, X direction). Can be formed.

Meanwhile, when the liquid crystal mode of the liquid crystal 41 is, for example, the TN mode, the upper electrode 90 may be formed to extend in a second direction (for example, Y direction) as shown in FIG. 4. The conductive wire 61, the first lower electrode 62, and the second lower electrode 63 have a third angle having an angle of 30 to 60 degrees with a second direction (for example, Y direction) as shown in FIG. 4. It can be formed in the direction.

That is, the formation direction of the conductive wire 61 of the wire grid polarizer 60 according to the embodiment of the present invention may be determined according to the liquid crystal 41 mode, as shown in FIGS. 3 and 4. It may correspond to an embodiment and variations thereof.

As described above, in the case of the touch screen panel according to the exemplary embodiment of the present invention, an ITO patterning process may be omitted in comparison with the conventional art, and an upper polarizing plate (not shown) that is conventionally attached to the upper electrode 90 is provided. ) May be omitted. In addition, a separate metal pad forming process is not required, and when the conductive wire 61 is formed by the metal nanoprinting process, the printing process may be performed even after the cell is formed, and thus the manufacturing process may be simplified and simplified.

In addition, since the upper polarizing plate (not shown) may be omitted, the thickness thereof may also be reduced as compared with the conventional touch screen panel, and the manufacturing cost may be reduced due to the omission.

Although the embodiments of the present invention have been described above with reference to the accompanying drawings, the present invention is not limited to the above embodiments but may be manufactured in various forms, and having ordinary skill in the art to which the present invention pertains. It will be understood by those skilled in the art that the present invention may be embodied in other specific forms without changing the technical spirit or essential features of the present invention. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive.

10: backlight unit 20: lower polarizer
30: TFT substrate 40: liquid crystal layer
50: color filter substrate 60: wire grid polarizer
70: adhesive member 80: column spacer
90: upper electrode 100: isotropic film

Claims (10)

Board;
A wire grid polarizer comprising a plurality of conductive wires formed on the substrate and a first lower electrode formed by binding at least two of the conductive wires of the plurality of conductive wires; And
And a top electrode formed on the wire grid polarizer. The method of claim 1,
The substrate comprises an ITO transparent substrate,
The conductive wire is a touch screen panel including an ITO transparent conductive wire. The method of claim 2,
The upper electrode is a touch screen panel comprising an ITO transparent film. The method of claim 1,
The wire grid polarizer further includes a second lower electrode formed by binding at least two conductive wires of the plurality of conductive wires,
At least two conductive wires are formed between the first lower electrode and the second lower electrode. The method of claim 1,
The first lower electrode extends in a first direction,
The upper electrode extends in a second direction perpendicular to the first direction. The method of claim 1,
The first lower electrode extends in a first direction,
The upper electrode extends in a second direction having an angle of 30 to 60 degrees with the first direction. The method of claim 1,
And an OLB pad connected to the wire grid polarizer. The method of claim 1,
And a viewing angle compensation film formed on or below the substrate. The method of claim 1,
The touch screen panel further comprises a plurality of spacers formed on the wire grid polarizer. A color filter substrate made of ITO;
A plurality of conductive wires formed on the color filter substrate and extending in a first direction and formed of ITO, a first lower electrode formed by binding at least two of the conductive wires of the plurality of conductive wires, and a plurality of conductive wires A wire grid polarizer comprising a second lower electrode formed by binding at least two conductive wires;
An OLB pad connected to the wire grid polarizer;
A plurality of column spacers formed on the wire grid polarizer; And
And an upper electrode formed on the column spacer in a second direction perpendicular to the first direction, the upper electrode comprising an ITO transparent film.

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