KR20150000184A - Color Filter Substrate for Display Device with Integrated Touch Screen and Method for Fabricating The Same - Google Patents

Color Filter Substrate for Display Device with Integrated Touch Screen and Method for Fabricating The Same Download PDF

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Publication number
KR20150000184A
KR20150000184A KR1020130072293A KR20130072293A KR20150000184A KR 20150000184 A KR20150000184 A KR 20150000184A KR 1020130072293 A KR1020130072293 A KR 1020130072293A KR 20130072293 A KR20130072293 A KR 20130072293A KR 20150000184 A KR20150000184 A KR 20150000184A
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KR
South Korea
Prior art keywords
touch
passivation layer
touch sensing
color filter
layer
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KR1020130072293A
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Korean (ko)
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KR102047227B1 (en
Inventor
이소형
조성용
이재균
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엘지디스플레이 주식회사
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Priority to KR1020130072293A priority Critical patent/KR102047227B1/en
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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
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/20—Filters
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0412—Digitisers structurally integrated in a display

Abstract

According to an embodiment of the present invention, a color filter substrate for display device with an integrated touch screen comprises: a black matrix which is formed on a substrate; a first protective layer which is formed on the black matrix; a plurality of touch sensing electrodes and a plurality of touch driving electrode rows which are formed on the first protective layer; a second protective layer which is formed on the touch sensing electrodes, the touch driving electrode rows, and the first protective layer; a bridge which is formed on the second protective layer and connects the touch sensing electrodes one another; a color filter layer which is formed on the second protective layer and the bridge; and a third protective layer which is formed on the color filter layer. The touch sensing electrodes comprise a first mesh pattern which is formed by crossing first metal lines. The touch driving electrode row comprises a plurality of second mesh patterns which is formed by crossing second metal lines. The first and second metal lines are formed on an area corresponding to the black matrix.

Description

TECHNICAL FIELD [0001] The present invention relates to a color filter substrate for a touch screen integrated type display device and a method of manufacturing the same,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a touch screen integrated display device, and more particularly, to a color filter substrate used in a touch screen integrated display device.

In the display device, there is a display device in which electrodes are arranged alternately on one of the upper and lower substrates and a liquid crystal is arranged between the substrates, and in particular, a touch electrode for sensing a touch input of a user is built in a display device There is a touch screen integrated display device.

Typically, the touch screen integrated type display device is formed by a color filter substrate on which a color filter array is formed and a thin film transistor substrate on which a thin film transistor array is formed, by bonding the liquid crystal between the color filter substrate and the liquid crystal, and controlling the light transmittance of liquid crystal having dielectric anisotropy by using an electric field Thereby displaying an image.

Here, a thin film transistor (hereinafter referred to as TFT) substrate is formed with TFTs, pixel electrodes, and common electrodes formed on the substrate in each cell region defined by the intersection of the gate line and the data line, A black matrix BM for blocking the black matrix BM and a color filter of red, green and blue for implementing the RGB image are formed with the black matrix BM interposed therebetween.

A general touch screen integrated display device is driven in a time division manner in a display drive mode or a touch drive mode according to a drive mode. In other words, if the driving mode of the display device is the display driving mode, the pixel electrode of the TFT substrate receives the data signal from the TFT, the common electrode receives the common voltage which is the reference of liquid crystal driving, The pixel electrode or the common electrode is divided into a touch electrode and a touch electrode, so that the touch electrode is divided into a plurality of pixel electrodes, Thereby detecting the touch position by the input.

However, in a conventional touch screen integrated type display device, a pixel electrode or a common electrode is divided on a TFT substrate to form a touch electrode, which is difficult to design, and it is difficult to implement a large size due to an increase in time constant.

In the present invention, a touch screen integrated type display device capable of solving the problems of the above-described general touch screen type integrated display device will be described, and in particular, a color filter substrate for a touch screen integrated display device in which a touch electrode is formed on a color filter substrate Let's look at it.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a touch screen integrated display device in which a touch electrode is formed on a color filter substrate.

According to an aspect of the present invention, there is provided a color filter substrate for a touch screen integrated display, comprising: a black matrix formed on a substrate; A first protective layer formed on the black matrix; A plurality of touch sensing electrodes and a plurality of touch driving electrode columns formed on the first passivation layer; A plurality of touch sensing electrodes, a plurality of touch driving electrode rows, and a second passivation layer formed on the first passivation layer; A bridge formed on the second passivation layer and connecting the plurality of touch sensing electrodes to each other; A color filter layer formed on the second passivation layer and the bridge; And a third protective layer formed on the color filter layer, wherein the plurality of touch sensing electrodes include a first mesh pattern formed by intersection of first metal lines, and the plurality of touch driving electrodes The column includes a plurality of second mesh patterns formed by the intersection of the second metal lines, and the first and second metal lines are formed in a region corresponding to the black matrix.

According to an aspect of the present invention, there is provided a method of manufacturing a color filter substrate for a touch screen integrated display, including: forming a black matrix on a substrate; Forming a first passivation layer on the black matrix; Forming a plurality of touch sensing electrodes and a plurality of touch driving electrode columns on the first passivation layer; Forming a plurality of touch sensing electrodes and a plurality of touch driving electrode rows and a second passivation layer on the first passivation layer; Forming a bridge connecting the plurality of touch sensing electrodes to each other on the second passivation layer; Forming a color filter layer on the second passivation layer and the bridge; And forming a third passivation layer on the color filter layer, wherein the plurality of touch sensing electrodes comprise a first mesh pattern formed by intersection of first metal lines, The driving electrode row includes a plurality of second mesh patterns formed by the intersection of the second metal lines, and the first and second metal lines are formed in a region corresponding to the black matrix .

According to one embodiment of the present invention, by using a metal having excellent conductivity as a material of the touch electrode, it is possible to manufacture a touch screen integrated display device of a large size with a reduced time constant due to low resistance.

In addition, according to embodiments of the present invention, the visibility can be enhanced by covering the black matrix region with the touch electrode.

In addition, according to embodiments of the present invention, a high transmittance and brightness can be ensured as the touch electrode is covered with the black matrix region.

Further, according to the embodiments of the present invention, the technical difficulty of production can be lowered by forming the touch electrode on the color filter substrate.

1 to 9 are cross-sectional views illustrating a method of manufacturing a color filter substrate for a touch screen integrated display device according to an embodiment of the present invention.
10 is a view showing electrodes in the form of a mesh of a color filter substrate for a touch screen integrated display according to an embodiment of the present invention; And
11 is an enlarged view of a region B in Fig. 10 of the present invention. Fig.

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

In describing an embodiment of the present invention, When described as being formed, such a substrate should be construed to include not only when these structures are in contact with each other but also when a third structure is interposed between these structures.

In addition, the touch screen integrated type display device can be manufactured by joining the color filter substrate and the TFT substrate according to the present invention by including a liquid crystal layer between the color filter substrate and the TFT substrate. However, in the process of forming the TFT substrate and bonding the TFT substrate to the color filter substrate Is a general technique among those skilled in the art, so that the process of forming a color filter substrate will be described only in the present invention.

Hereinafter, a color filter substrate for a touch screen integrated display device and a method of manufacturing the same according to an embodiment of the present invention will be described in detail with reference to FIGS. 1 to 9. FIG.

1 to 9, the right drawing is a sectional view taken along the line I-I 'in the left drawing of FIGS. 1 to 9. As shown in FIGS.

A method of manufacturing a color filter substrate for a touch screen integrated display device according to an embodiment of the present invention includes forming a black matrix 210 on a substrate 200 for a color filter as shown in FIG. In this case, the black matrix carries a resin material in the vicinity of a color (RGB) pigment boundary so that only the light in the pixel transmitting region passes through the backlight. In addition, the black matrix has an effect of improving the CR by blocking unintended light transmission.

Next, a first passivation layer 220 is formed on the black matrix 210 as shown in FIG. Here, the first protective layer may be formed of an overcoat layer. The overcoat layer serves to eliminate the height difference in the color filter substrate.

Next, as shown in FIG. 3, a plurality of touch electrodes 230 are formed on the first passivation layer 220.

Here, the plurality of touch electrodes 230 are divided into a plurality of touch sensing electrodes and a plurality of touch driving electrode columns, and the plurality of touch sensing electrodes may be connected to each other through a bridge to be a plurality of touch sensing electrode columns.

The integrated touchscreen display device according to an embodiment of the present invention includes a touch driving electrode row Tx and a touch sensing electrode row Tx when a driving pulse is applied to a plurality of touch driving electrode rows Tx from a touch driving unit Rx) to the touch sensing unit (not shown) through the plurality of touch sensing electrode rows Rx, and the touch sensing unit senses the touch position of the user Function.

Here, the touch driver and the touch sensing unit are connected to the plurality of touch electrodes 230 through the routing wiring 201 and the connection wiring 202.

A plurality of touch sensing electrodes according to an embodiment of the present invention includes a first mesh pattern formed by intersection of first metal lines and a plurality of touch driving electrode lines are formed by intersection of second metal lines And a plurality of second mesh patterns to be formed.

In other words, if one Rx shown in FIG. 3 is regarded as one first metal line, three first metal lines on the left side with Tx interposed therebetween can be seen as a part of one first mesh pattern connected to each other And the first three metal lines on the right side can be seen as a part of one first mesh pattern connected to each other. In addition, Tx shown in FIG. 3 may be represented by only one Tx since the plurality of turntable driving electrodes are connected to form the touch driving electrode row.

The touch electrode having the above mesh pattern shape will be described in detail with reference to FIGS. 10 and 11 of the present invention.

The first and second metal lines according to an embodiment of the present invention may be selected from metal materials such as Al, AlNd, Mo, MoTi, Cu, Cr, Ag and Ag alloys. By using a metal having excellent conductivity as the material of the touch electrode, it is possible to manufacture a touch screen integrated type display device of a large size with a reduced time constant due to low resistance.

The first metal lines forming the plurality of touch sensing electrodes of the color filter substrate for a touch screen integrated display device according to the embodiment of the present invention and the second metal lines forming the plurality of touch driving electrode lines are formed in the black matrix (Not shown).

In other words, the touch electrode 230 is formed in the area corresponding to the black matrix 210, so that the visibility can be increased as the touch electrode area is covered with the black matrix area, and high transmittance and brightness can be ensured. Further, the touch electrode can be realized without optical loss due to the formation of the touch electrode.

In addition, the width W2 of each metal line may be formed to be equal to or less than the width W1 of each line of the black matrix in order to more reliably cover the black matrix area with the touch electrode area. In other words, the width W1 of each line of the black matrix may be formed to be equal to or larger than the width W2 of each of the metal lines constituting the first and second mesh patterns.

Next, as shown in FIG. 4, a second passivation layer 240 is formed on the plurality of touch sensing electrodes Rx, the plurality of touch driving electrode columns Tx, and the first passivation layer 220. In other words, the second passivation layer 240 is formed to include a contact hole exposing any one of the first metal lines forming the touch sensing electrode Rx, and one touch sensing electrode is generally provided with one contact Holes may be formed. The second passivation layer may be formed of a passivation layer.

Next, as shown in FIG. 5, a bridge 250 connecting the plurality of touch sensing electrodes to each other is formed on the second passivation layer 240. In other words, a bridge 250 is formed that connects neighboring touch sensing electrodes on the second passivation layer 240, wherein the bridge exposes a first metal line forming the touch sensing electrode Rx The touch sensing electrodes adjacent to each other are connected to each other through the contact hole, so that the touch sensing electrode can form a row of touch sensing electrodes.

Next, RGB color filter layers 261, 262, and 263 are formed on the second passivation layer 220 and the bridge 250, as shown in FIGS.

Here, the color filter layer is a filter layer that separates white light emitted from a light source into red, green, and blue, which are three primary colors of light. The color filter layer is a filter layer that separates white light emitted from a light source And are in one-to-one correspondence with the sub-PXL of the TFT substrate.

Next, a third passivation layer 270 is formed on the color filter layer as shown in FIG. Here, the third passivation layer 270 may be formed of photoacrylic. Photoacrylic serves as a photoresist (PR) and an insulating film.

Hereinafter, the shape of the touch electrode of the color filter substrate for a touch screen integrated display device according to an embodiment of the present invention will be described in detail with reference to FIGS. 10 and 11. FIG.

FIG. 10 is an enlarged view of a region A in FIG. 5, showing a mesh-shaped electrode of a color filter substrate for a touch screen integrated display device according to an embodiment of the present invention, and FIG. 11 is a cross- 10 is an enlarged view of a region B in Fig.

As shown in FIG. 10, the touch electrode is divided into a plurality of touch sensing electrode rows Rx and a plurality of touch driving electrode rows Tx. First, a plurality of touch sensing electrode rows are arranged in the longitudinal direction in FIG. 10, and a plurality of touch sensing electrodes are connected to each other to constitute a plurality of touch sensing electrode columns. The plurality of touch driving electrode rows are arranged in the horizontal direction in Fig. The connection unit for connecting the touch sensing electrodes to each other is not shown in FIG. 10 so as to show a portion where a plurality of touch driving electrode rows are connected, but it can be seen from FIG. The touch sensing electrode row and the touch driving electrode row are formed without being overlapped on a single plane.

Next, as shown in FIG. 11, a plurality of touch sensing electrode rows Rx and a plurality of touch driving electrode rows Tx are formed of electrodes in the form of a mesh.

In other words, a plurality of touch sensing electrode columns are formed by connecting a plurality of touch sensing electrodes through a bridge 250, each of the touch sensing electrodes is formed in a mesh shape, It is composed in the form.

For example, after a metal for a touch electrode is formed on the entire surface of the substrate, a pattern is formed by performing wet etching in a desired mesh shape, and the mesh-shaped metal is cut into a plurality of touch sensing electrodes and a touch driving electrode row. After that, the touch sensing electrodes and the touch driving electrode columns can be formed by connecting the touch sensing electrodes through the bridges.

The metal for the touch electrode may be formed of a material selected from metal materials such as Al, AlNd, Mo, MoTi, Cu, Cr, Ag and Ag based alloys.

Further, the touch electrode may be formed in a mesh shape to reduce the capacitance, and finally the touch sensing time can be reduced due to the low RC delay.

Although only a process for manufacturing a color filter substrate for a touch screen integrated type display device is described in this specification, the present invention is not limited to this, and a TFT substrate may be formed and then a liquid crystal layer may be interposed between the TFT substrate and the touch screen integrated display device Can be manufactured.

It will be understood by those skilled in the art that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof.

It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. The scope of the present invention is defined by the appended claims rather than the detailed description and all changes or modifications derived from the meaning and scope of the claims and their equivalents are to be construed as being included within the scope of the present invention do.

200: substrate 201: routing wiring
202: connection wiring 210: black matrix
220: first protection layer 230: touch electrode
240: second protection layer 250: bridge
261, 262, 263: RGB color filter 270: third protective layer

Claims (12)

A black matrix formed on the substrate;
A first protective layer formed on the black matrix;
A plurality of touch sensing electrodes and a plurality of touch driving electrode columns formed on the first passivation layer;
A plurality of touch sensing electrodes, a plurality of touch driving electrode rows, and a second passivation layer formed on the first passivation layer;
A bridge formed on the second passivation layer and connecting the plurality of touch sensing electrodes to each other;
A color filter layer formed on the second passivation layer and the bridge; And
And a third protective layer formed on the color filter layer,
Wherein the plurality of touch sensing electrodes comprise a first mesh pattern formed by intersection of first metal lines and the plurality of touch driving electrode lines comprise a plurality of second metal lines formed by intersection of second metal lines, Includes mesh patterns,
Wherein the first and second metal lines are formed in a region corresponding to the black matrix.
The method according to claim 1,
Wherein the second protection layer includes a contact hole exposing the first metal lines forming the touch sensing electrode, and the bridge is connected to the touch sensing electrode through the contact hole. A color filter substrate for a touch screen integrated display device.
The method according to claim 1,
Wherein a width W1 of each line of the black matrix is equal to or greater than a width W2 of each metal line forming the first and second mesh patterns.
The method according to claim 1,
Wherein the first passivation layer is an overcoat layer.
The method according to claim 1,
Wherein the second passivation layer is a passivation layer and the third passivation layer is a photoacid. The method according to claim 1,
Wherein the first and second metal lines are selected from metal materials such as Al, AlNd, Mo, MoTi, Cu, Cr, Ag, Ag alloys.
Forming a black matrix on the substrate;
Forming a first passivation layer on the black matrix;
Forming a plurality of touch sensing electrodes and a plurality of touch driving electrode columns on the first passivation layer;
Forming a plurality of touch sensing electrodes and a plurality of touch driving electrode rows and a second passivation layer on the first passivation layer;
Forming a bridge connecting the plurality of touch sensing electrodes to each other on the second passivation layer;
Forming a color filter layer on the second passivation layer and the bridge; And
And forming a third protective layer on the color filter layer,
Wherein the plurality of touch sensing electrodes comprise a first mesh pattern formed by intersection of first metal lines and the plurality of touch driving electrode lines comprise a plurality of second metal lines formed by intersection of second metal lines, Includes mesh patterns,
Wherein the first and second metal lines are formed in a region corresponding to the black matrix.
8. The method of claim 7,
Wherein the second protection layer includes a contact hole exposing the first metal line forming the touch sensing electrode and the bridge is connected to the touch sensing electrode through the contact hole, A method of manufacturing a color filter substrate for a touch screen integrated display device.
8. The method of claim 7,
Wherein a width W1 of each line of the black matrix is equal to or greater than a width W2 of each of the metal lines forming the first and second mesh patterns. .
8. The method of claim 7,
Wherein the first protective layer is an overcoat layer. ≪ RTI ID = 0.0 > 11. < / RTI >
8. The method of claim 7,
Wherein the second passivation layer is the second passivation layer and the third passivation layer is photoacryl.
8. The method of claim 7,
Wherein the first and second metal lines are selected from metal materials such as Al, AlNd, Mo, MoTi, Cu, Cr, Ag and Ag alloys. .
KR1020130072293A 2013-06-24 2013-06-24 Color Filter Substrate for Display Device with Integrated Touch Screen and Method for Fabricating The Same KR102047227B1 (en)

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CN108535923A (en) * 2018-06-11 2018-09-14 Oppo广东移动通信有限公司 Touch-control display module and electronic device
WO2019237943A1 (en) * 2018-06-11 2019-12-19 Oppo广东移动通信有限公司 Touch control display module and electronic apparatus
CN111142703A (en) * 2019-12-09 2020-05-12 武汉华星光电半导体显示技术有限公司 Touch panel and manufacturing method thereof

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KR20120037610A (en) * 2010-10-12 2012-04-20 엘지디스플레이 주식회사 Liquid crystal display device
KR20130020313A (en) * 2011-08-19 2013-02-27 삼성전기주식회사 Touch sensor and method for manufacturing the same
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CN111142703B (en) * 2019-12-09 2023-03-28 武汉华星光电半导体显示技术有限公司 Touch panel and manufacturing method thereof

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