KR20080099955A - Liquid crystal display and manufacturing method thereof - Google Patents

Abstract

A liquid crystal display device and a method for manufacturing the same are provided to reduce the number of manufacturing process by forming color filter and sensing protrusion at a time. A first substrate and a second substrate are facing each other. A sense data line is formed on the first substrate. The length sense data line(172) is formed on the first substrate. The first sensor(196) is electrically connected to the width sense data line. The second sensor(197) is electrically connected to the length sense data line. The sensing protrusion(231) is formed on the second substrate. The adhesion force strength member(221) is formed on the sensing protrusion.

Description

Liquid crystal display device and its manufacturing method {LIQUID CRYSTAL DISPLAY AND MANUFACTURING METHOD THEREOF}

1 is a diagram illustrating a liquid crystal display according to an exemplary embodiment of the present invention.

FIG. 2 is a cross-sectional view of the liquid crystal display shown in FIG. 1 taken along line II-II. FIG.

3, 5, 7, and 9 are layout views sequentially illustrating a method of manufacturing a lower panel according to an exemplary embodiment of the present invention.

FIG. 4 is a cross-sectional view of the lower panel of FIG. 3 taken along the line IV-IV.

FIG. 6 is a cross-sectional view of the lower panel of FIG. 5 taken along line VI-VI.

FIG. 8 is a cross-sectional view of the lower panel of FIG. 7 taken along the line VIII-VIII.

FIG. 10 is a cross-sectional view of the lower panel of FIG. 9 taken along the line X-X. FIG.

11, 13, 15, and 17 are layout views sequentially illustrating a method of manufacturing the upper panel according to an exemplary embodiment of the present invention.

FIG. 12 is a cross-sectional view of the upper panel of FIG. 11 taken along the line XII-XII.

FIG. 14 is a cross-sectional view of the upper panel of FIG. 13 taken along the line XIV-XIV.

FIG. 16 is a cross-sectional view of the upper panel of FIG. 15 taken along the line XVI-XVI.

FIG. 18 is a cross-sectional view of the upper panel of FIG. 17 taken along the line XVIII-XVIII.

19 is a cross-sectional view of an upper panel according to another exemplary embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

100: lower display panel 121: video scanning line

124: gate electrode 125: horizontal sensing data line

133: sustain electrode 154: semiconductor

171: Image data line 172: Vertical sensing data line

173: source electrode 175: drain electrode

180: protective film 191: pixel electrode

196: first detector 197: second detector

200: upper display panel 220: light blocking member

221: contact strength reinforcing member 230: color filter

231: sensing protrusion 270: common electrode

300: liquid crystal layer

The present invention relates to a liquid crystal display device.

The liquid crystal display is one of the most widely used flat panel display devices, and includes two display panels on which an electric field generating electrode such as a pixel electrode and a common electrode are formed, and a liquid crystal layer interposed therebetween. The liquid crystal display generates an electric field in the liquid crystal layer by applying a voltage to the field generating electrode, thereby determining an orientation of liquid crystal molecules in the liquid crystal layer and controlling the polarization of incident light to display an image.

A touch screen panel refers to a device that touches a finger or a pen on the screen to write and draw a character or a picture, or executes an icon to perform a desired command on a machine such as a computer.

The liquid crystal display with a touch screen panel may find out whether the user's finger or a touch pen touches the screen and the contact position information.

In the conventional touch screen panel, an additional device using a detectable film or the like is installed on a panel of a liquid crystal display device, and the physical pressure is converted into an electrical signal and used as an input device.

Currently, a technology for enabling touch sensing in a liquid crystal display device by developing spacers is being developed.

However, in this process, the material cost increases due to the increase of the process, and the spacer is an organic material, and the contact sensing part that determines whether or not the contact is damaged by the pressure applied from the outside occurs.

The technical problem to be achieved by the present invention is to reduce the manufacturing process of the liquid crystal display device having a touch screen function and to prevent damage of the sensing protrusion due to pressure from the outside.

The present invention for achieving the technical problem proposes a sensing protrusion using a color filter.

The liquid crystal display according to the exemplary embodiment of the present invention includes a first sensing substrate and a second substrate facing each other, a horizontal sensing data line formed on the first substrate, a vertical sensing data line formed on the first substrate, and a horizontal sensing data. A first sensing unit electrically connected to the line, a second sensing unit electrically connected to the vertical sensing data line, a sensing protrusion formed on the second substrate, a contact strength reinforcing member formed on the sensing protrusion, and a contact strength reinforcing member It includes a common electrode formed above.

The light blocking member may further include a light blocking member formed between the second substrate and the common electrode, and the contact strength enhancing member may be made of the same material as the light blocking member.

The color filter may further include a color filter formed between the second substrate and the common electrode, and the sensing protrusion may be formed by stacking color filters.

The spacer may further include a spacer formed on the common electrode.

The sensing protrusion may be formed at a position corresponding to the first sensing part and the second sensing part.

According to another exemplary embodiment of the present invention, a liquid crystal display includes a first sensing substrate and a second substrate facing each other, a horizontal sensing data line formed on the first substrate, a vertical sensing data line formed on the first substrate, and a horizontal sensing data. A first sensing unit electrically connected to the line, a second sensing unit electrically connected to the vertical sensing data line, a sensing protrusion formed on the second substrate, a common electrode formed on the sensing protrusion, and a common electrode on the sensing protrusion And a contact strength reinforcing member formed thereon.

The light blocking member may be further formed on the common electrode, and the contact strength reinforcing member may be made of the same material as the light blocking member.

The color filter may further include a color filter formed between the second substrate and the common electrode, and the sensing protrusion may be formed by stacking color filters.

The spacer may further include a spacer formed on the common electrode.

The sensing protrusion may be formed at a position corresponding to the first sensing part and the second sensing part.

A method of manufacturing a liquid crystal display according to an exemplary embodiment of the present invention may include forming a horizontal sensing data line on a first substrate, forming a vertical sensing data line on a first substrate, and electrically connecting the horizontal sensing data line. Forming a second sensing unit electrically connected to the first sensing unit and the vertical sensing data line, forming a color filter and a sensing protrusion on the second substrate, forming a contact strength reinforcing member on the sensing protrusion, a color filter and Forming a common electrode on the contact strength reinforcing member.

The forming of the color filter and the sensing protrusion on the second substrate may include forming a first layer of the first color filter and the sensing protrusion, forming a second layer of the second color filter and the sensing protrusion, and a third layer. And forming a third layer of the color color filter and the sensing protrusion.

In the forming of the contact strength reinforcing member on the sensing protrusion, the light blocking member may be formed together between the second substrate and the common electrode.

The method may further include forming a spacer on the common electrode.

The method may further include coupling the first substrate and the second substrate, and in the coupling of the first substrate and the second substrate, the sensing protrusion may be aligned and coupled to correspond to the first sensing unit and the second sensing unit.

In another aspect of the present invention, there is provided a method of manufacturing a liquid crystal display, including forming a horizontal sensing data line on a first substrate, forming a vertical sensing data line on a first substrate, and electrically connecting the horizontal sensing data line. 1 forming a second sensing unit electrically connected to the sensing unit and the vertical sensing data line, forming a color filter and a sensing protrusion on the second substrate, forming a common electrode on the color filter and the sensing protrusion, and a sensing protrusion Forming a contact strength reinforcing member over the common electrode.

The forming of the color filter and the sensing protrusion on the second substrate may include forming a first layer of the first color filter and the sensing protrusion, forming a second layer of the second color filter and the sensing protrusion, and a third layer. And forming a third layer of the color color filter and the sensing protrusion.

In the forming of the contact strength reinforcing member on the common electrode on the sensing protrusion, the light blocking member may be formed together on the common electrode.

The method may further include forming a spacer on the common electrode.

The method may further include combining the first substrate and the second substrate, and the combining of the first substrate and the second substrate may be performed by aligning the sensing protrusions so as to correspond to the first sensing unit and the second sensing unit.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention.

In the drawings, the thickness of layers, films, panels, regions, etc., are exaggerated for clarity. Like parts are designated by like reference numerals throughout the specification. When a part of a layer, film, area, plate, etc. is said to be "on" another part, this includes not only the other part being "right over" but also another part in the middle. On the contrary, when a part is "just above" another part, there is no other part in the middle.

1 is a diagram illustrating a liquid crystal display according to an exemplary embodiment of the present invention, and FIG. 2 is a cross-sectional view taken along the line II-II of the liquid crystal display of FIG. 1.

The liquid crystal display according to the present exemplary embodiment includes a lower panel 100, an upper panel 200 facing the lower panel 100, and a liquid crystal layer 300 sandwiched therebetween.

First, the lower panel 100 will be described in detail.

A plurality of image scanning lines 121, a plurality of storage electrodes 133, and a plurality of horizontal sensing data lines 125 are formed on an insulating substrate 110 made of transparent glass or the like.

The image scanning line 121 transmits an image scanning signal and mainly extends in a horizontal direction. Each image scanning line 121 includes a wide end portion (not shown) for connecting a plurality of gate electrodes 124 to another layer or an external driving circuit. A gate driving circuit (not shown) for generating an image scanning signal may be mounted on a flexible printed circuit film (not shown) attached to the substrate 110 or directly mounted on the substrate 110. , May be integrated into the substrate 110. When the gate driving circuit is integrated on the substrate 110, the image scanning line 121 may be extended to be directly connected thereto.

The sustain electrode 133 is applied with a predetermined voltage and includes a horizontal portion extending substantially in parallel with the image scanning line 121 and a vertical portion separated therefrom. Each of the storage electrodes 133 is positioned between two adjacent image scanning lines 121, and the horizontal part is closer to the upper side of the two image scanning lines 121. The shape and arrangement of the storage electrode 133 may be modified in various ways.

The horizontal sensing data line 125 transmits a sensing signal and mainly extends in the horizontal direction. Each horizontal sensing data line 125 includes a protrusion 126 electrically connected to the first sensing unit 196.

The image scanning line 121, the sustain electrode 133, and the horizontal sensing data line 125 may include aluminum (Al) or an aluminum alloy, molybdenum (Mo), or molybdenum-tungsten (MoW) alloy, chromium (Cr), and tantalum (Ta). It is formed of a metal or a conductor such as.

Sides of the image scanning line 121, the storage electrode 133, and the horizontal sensing data line 125 are inclined with respect to the surface of the substrate 110, and the inclination angle is preferably about 30 ° to about 80 °.

A gate insulating layer 140 made of an insulating material is formed on the image scanning line 121, the sustain electrode 133, and the horizontal sensing data line 125, and a plurality of semiconductors 154 are formed on the gate insulating layer 140. .

A plurality of ohmic contacts 163 and 165 are formed on the semiconductor 154. The ohmic contacts 163 and 165 are paired and disposed on the semiconductor 154.

A plurality of image data lines 171, a plurality of drain electrodes 175, and a plurality of vertical sensing data lines 172 are disposed on the ohmic contacts 163 and 165 and the gate insulating layer 140. Formed.

The image data line 171 transmits an image data signal and mainly extends in the vertical direction to cross the image scan line 121. Each image data line 171 has a wide end portion (not shown) for connecting a plurality of source electrodes 173 extending toward the gate electrode 124 with another layer or an external driving circuit. Include. A data driving circuit (not shown) for generating an image data signal is mounted on a flexible printed circuit film (not shown) attached to the substrate 110, directly mounted on the substrate 110, or mounted on the substrate 110. Can be integrated. When the data driving circuit is integrated on the substrate 110, the image data line 171 may be extended to be directly connected thereto.

The drain electrode 175 is separated from the image data line 171 and faces the source electrode 173 with respect to the gate electrode 124. Each drain electrode 175 has one end portion having a large area and the other end portion having a rod shape. The rod-shaped end portion is partially surrounded by the source electrode 173 bent in a U shape.

The vertical sensing data line 172 transmits a sensing signal and mainly extends in a horizontal direction. Each horizontal sensing data line 125 includes a protrusion 174 electrically connected to the second sensing unit 197.

The gate electrode 124, the source electrode 173, and the drain electrode 175 form a thin film transistor (TFT) together with the semiconductor 154, and a channel of the thin film transistor is connected to the source electrode 173. It is formed in the semiconductor 154 between the drain electrode 175.

The image data line 171, the source electrode 173, the drain electrode 175, and the vertical sensing data line 172 may be made of a refractory metal such as chromium, molybdenum, tantalum, titanium, or an alloy thereof.

The data line 171, the source electrode 173, the drain electrode 175, and the vertical sensing data line 172 are also preferably inclined at an inclination angle of about 30 ° to about 80 ° with respect to the surface of the substrate 110. .

The ohmic contacts 163 and 165 exist only between the semiconductor 154 below and the data line and drain electrode 175 thereon, and serve to lower the contact resistance.

A passivation layer 180 having contact holes 185, 186, and 187 is formed on the data line 171, the drain electrode 175, the vertical sensing data line 172, and the exposed semiconductor 154.

A plurality of pixel electrodes 191, a plurality of first sensing units 196, and a plurality of second sensing units 197 are formed on the passivation layer 180. These may be made of a transparent conductive material such as ITO or IZO or a reflective metal such as aluminum, silver or an alloy thereof.

The pixel electrode 191 is physically and electrically connected to the drain electrode 175 through the contact hole 185 to receive a data voltage from the drain electrode 175.

The pixel electrode 191 to which the data voltage is applied generates an electric field together with the common electrode 270 of the upper panel 200 to determine the arrangement of liquid crystal molecules of the liquid crystal layer 300 between the two electrodes.

In addition, each pixel electrode 191 and the common electrode 270 form a liquid crystal capacitor to maintain an applied voltage even after the thin film transistor is turned off, and expand the voltage holding capability by providing a storage capacitor connected in parallel with the liquid crystal capacitor. do.

The first sensing unit 196 is physically and electrically connected to the protrusion 126 of the horizontal sensing data line 125 through the contact hole 186, and the second sensing unit 197 opens the contact hole 187. It is physically and electrically connected to the protrusion 174 of the vertical sensing data line 172 through.

The first sensing unit 196 and the second sensing unit 197 are physically and electrically connected to each other by a user's contact with the sensing protrusion 231 formed on the upper panel 200.

Therefore, when the sensing protrusion 231, the first sensing unit 196, and the second sensing unit 197 come into contact with each other by the user's contact, the sensing data signal flowing through the horizontal sensing data line 125 is analyzed to determine the Y of the contact point. The coordinates are determined, and the X coordinates of the contact points are determined by analyzing the sensing data signal flowing through the vertical sensing data line 172 to determine the contact position where the user touches.

Next, the upper panel 200 will be described.

The red color filter 230R, the green color filter 230G, and the blue color filter 230B are repeatedly formed on the insulating substrate 210 made of transparent glass or the like.

A sensing protrusion 231 is formed between each color filter 230R, 230G, and 230B to sense a user's contact from the outside.

A light blocking member 220 called a black matrix for preventing light leakage is formed between the sensing protrusion 231 and the color filters 230R, 230G, and 230B. In addition, a contact strength reinforcing member 221 formed of the same material as the light blocking member 220 is formed on the sensing protrusion 231.

1 and 2, the contact strength reinforcing member 221 disposed on the sensing protrusion 231 is not formed at the side of the sensing protrusion 231, but the contact strength reinforcing member 221 is detected. It may be deposited on the side of the protrusion 231 to be formed to cover the sensing protrusion 231.

On the color filters 230R, 230G and 230B and the light blocking member 220, a common electrode 270 made of a transparent conductor such as ITO and IZO is formed.

When the sensing protrusion 231 contacts the first sensing unit 196 and the second sensing unit 197 by an external pressure of the user, the common electrode 270 surrounding the sensing protrusion 231 serves as a connection switch. do.

Next, a method of manufacturing the liquid crystal display device illustrated in FIGS. 1 and 2 will be described in detail with reference to FIGS. 3 to 19.

First, the manufacturing method of the lower panel 100 will be described in detail with respect to one pixel.

3, 5, 7, and 9 are layout views sequentially illustrating a method of manufacturing a lower panel according to an exemplary embodiment of the present invention, and FIG. 4 is a cross-sectional view of the lower panel of FIG. 3 taken along line IV-IV. 6 is a cross-sectional view of the lower panel of FIG. 5 taken along the line VI-VI. FIG. 8 is a cross-sectional view of the lower panel of FIG. 7 taken along the line VIII-VIII, and FIG. 10 is a cross-sectional view of the lower panel of FIG. 9 taken along the line X-X.

First, as shown in FIGS. 3 and 4, the aluminum (Al) or aluminum alloy, molybdenum (Mo) or molybdenum-tungsten (MoW) alloy, chromium (Cr), and tantalum (Ta) on the transparent insulating substrate 110. Metal films made of metals or conductors such as these are laminated. The metal film is etched to form an image scanning line 121 including the gate electrode 124, a storage electrode 133, and a horizontal sensing data line 125. The horizontal sensing data line 125 includes a protrusion 126 connected to the first sensing unit 196.

5 and 6, a gate insulating layer 140, an intrinsic amorphous silicon (a-Si) layer without doping impurities, and an amorphous silicon (n + a) doped with impurities are formed on the entire surface of the substrate 110. -Si) layer is formed.

The doped amorphous silicon and the intrinsic amorphous silicon are photo-etched to form a plurality of semiconductors 154 and an amorphous silicon layer 161 doped with impurities including a plurality of impurity semiconductor patterns.

Subsequently, as shown in FIGS. 7 and 8, a metal film made of a refractory metal such as chromium, molybdenum, tantalum, titanium, or an alloy thereof is stacked, and the metal film is etched to include image data including the source electrode 173. The line 171, the drain electrode 175, and the vertical sensing data line 172 are formed. The vertical sensing data line 172 includes a protrusion 174 connected to the second sensing unit 197.

Next, the exposed impurity semiconductor layer 161 that is not covered by the source electrode 173 and the drain electrode 175 is removed to form a plurality of ohmic contacts 163 and 165, and the semiconductor 154 below it. Expose the part.

Next, as shown in FIGS. 9 and 10, the protective film 180 is formed, the photoresist film is coated, the photoresist film is irradiated with light through a photomask, and then developed to develop the plurality of contact holes 185, 186, and 187. Form.

Next, a transparent conductive material such as ITO or IZO or a reflective metal layer made of aluminum, silver, or an alloy thereof is laminated on the passivation layer 180, and then patterned to form the pixel electrode 191, the first sensing unit 196, and the second. The sensing unit 197 is formed.

Next, a method of manufacturing the upper panel 200 will be described in detail with reference to FIGS. 11 to 18.

11, 13, 15, and 17 are layout views sequentially illustrating a method of manufacturing an upper panel according to an exemplary embodiment of the present invention, and FIG. 12 is a cross-sectional view of the upper panel of FIG. 11 taken along the line XII-XII. FIG. 14 is a cross-sectional view of the upper panel of FIG. 13 taken along the line XIV-XIV. FIG. 16 is a cross-sectional view of the upper panel of FIG. 15 taken along the line XVI-XVI, and FIG. 18 is a cross-sectional view of the upper panel of FIG. 17 taken along the line XVIII-XVIII.

As shown in FIGS. 11 and 12, a blue color filter 230B is formed in a blue pixel area on the transparent insulating substrate 110. At this time, the blue color filter 230B is formed in a predetermined thickness not only in the blue pixel region but also in the sensing protrusion 231 region of each pixel region.

13 and 14, a red color filter 230R is formed in the red pixel region, and a red color filter 230R is formed on the blue color filter 230B in the sensing protrusion 231 region. do.

15 and 16, the green color filter 230G is formed in the green pixel area, and the green color filter 230G is formed on the red color filter 230R in the detection protrusion 231 area. do.

The blue color filter 230B, the red color filter 230R, and the green color filter 230G are sequentially stacked to a predetermined thickness to form the sensing protrusion 231. The sensing protrusion 231 is formed for each pixel. However, spacers may be formed in the sensing protrusion 231 region.

17 and 18, the light blocking member 220 is formed between the sensing protrusion 231 and each of the color filters 230R, 230G, and 230B. In this case, the contact strength reinforcing member 221 is formed on the sensing protrusion 231.

Next, a common electrode 270 is formed on the color filters 230R, 230G, and 230B, the light blocking member 220, and the contact strength reinforcing member 221.

19 is a cross-sectional view of an upper panel according to another exemplary embodiment of the present invention.

Although the same as the upper panel of FIGS. 17 and 18, the order of forming the common electrode 270, the light blocking member 220, and the contact strength reinforcing member 221 is different.

That is, as illustrated in FIG. 19, the color filters 230R, 230G, and 230B and the sensing protrusion 210 are formed on the substrate 210, and then the common electrode 270 is formed thereon.

Next, the light blocking member 220 is formed in portions except the pixel region, and the contact strength reinforcing member 221 is formed on the common electrode on the sensing protrusion.

In the embodiment of FIG. 19, the contact strength reinforcing member 221 disposed on the sensing protrusion 231 is not formed on the side surface of the sensing protrusion 231, but the contact strength reinforcing member 221 is a sensing protrusion ( It is also deposited on the side of the 231 may be formed in a shape covering the sensing protrusion 231.

Although the preferred embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements of those skilled in the art using the basic concepts of the present invention defined in the following claims are also provided. It belongs to the scope of rights.

As in the present invention, by forming the color filter and forming the sensing protrusion, the manufacturing process of the liquid crystal display device can be reduced.

Further, by forming the contact strength reinforcing member with the same material as the light blocking member, it is possible to prevent the sensing protrusion from being deformed by external pressure.

Claims (20)

A first substrate and a second substrate facing each other, A horizontal sensing data line formed on the first substrate; A vertical sensing data line formed on the first substrate; A first detector electrically connected to the horizontal sensing data line; A second sensing unit electrically connected to the vertical sensing data line; A sensing protrusion formed on the second substrate, A contact strength reinforcing member formed on the sensing protrusion, And a common electrode formed on the contact strength reinforcing member. In claim 1, Further comprising a light blocking member formed between the second substrate and the common electrode, And the contact strength reinforcing member is made of the same material as the light blocking member. In claim 2, Further comprising a color filter formed between the second substrate and the common electrode, The sensing protrusion is formed by stacking the color filters. The method according to any one of claims 1 to 3, And a spacer formed on the common electrode. In claim 1, And the sensing protrusion is formed at a position corresponding to the first sensing unit and the second sensing unit. A first substrate and a second substrate facing each other, A horizontal sensing data line formed on the first substrate; A vertical sensing data line formed on the first substrate; A first detector electrically connected to the horizontal sensing data line; A second sensing unit electrically connected to the vertical sensing data line; A sensing protrusion formed on the second substrate, A common electrode formed on the sensing protrusion, And a contact strength reinforcing member formed on the common electrode on the sensing protrusion. Liquid crystal display. In claim 6, Further comprising a light blocking member formed on the common electrode, And the contact strength reinforcing member is made of the same material as the light blocking member. In claim 7, Further comprising a color filter formed between the second substrate and the common electrode, The sensing protrusion is formed by stacking the color filters. The method according to any one of claims 6 to 8, And a spacer formed on the common electrode. In claim 7, And the sensing protrusion is formed at a position corresponding to the first sensing unit and the second sensing unit. Forming a horizontal sensing data line on the first substrate; Forming a vertical sensing data line on the first substrate; Forming a first sensing unit electrically connected to the horizontal sensing data line and a second sensing unit electrically connected to the vertical sensing data line; Forming a color filter and a sensing protrusion on the second substrate, Forming a contact strength reinforcing member on the sensing protrusion, Forming a common electrode on the color filter and the contact strength enhancing member; The manufacturing method of a liquid crystal display device. In claim 11, Forming the color filter and the sensing protrusion on the second substrate is Forming a first layer of color filters and a first layer of the sensing protrusions; Forming a second color color filter and a second layer of the sensing protrusion; And forming a third layer of a third color filter and the sensing protrusion. In claim 11, In the step of forming a contact strength reinforcing member on the sensing protrusion And a light blocking member formed between the second substrate and the common electrode. In claim 11, And forming a spacer on the common electrode. In claim 11, Coupling the first substrate and the second substrate; In the step of combining the first substrate and the second substrate And manufacturing the liquid crystal display in such a manner that the sensing protrusions are aligned to correspond to the first and second sensing units. Forming a horizontal sensing data line on the first substrate; Forming a vertical sensing data line on the first substrate; Forming a first sensing unit electrically connected to the horizontal sensing data line and a second sensing unit electrically connected to the vertical sensing data line; Forming a color filter and a sensing protrusion on the second substrate, Forming a common electrode on the color filter and the sensing protrusion; Forming a contact strength reinforcing member over said common electrode over said sensing protrusion; The manufacturing method of a liquid crystal display device. The method of claim 16, Forming the color filter and the sensing protrusion on the second substrate is Forming a first layer of color filters and a first layer of the sensing protrusions; Forming a second color color filter and a second layer of the sensing protrusion; And forming a third layer of a third color filter and the sensing protrusion. The method of claim 16, In the forming of the contact strength reinforcing member on the common electrode on the sensing protrusion, And a light blocking member formed on the common electrode together. The method of claim 16, And forming a spacer on the common electrode. The method of claim 16, Coupling the first substrate and the second substrate; Joining the first substrate and the second substrate is And manufacturing the liquid crystal display in such a manner that the sensing protrusions are aligned to correspond to the first and second sensing parts.

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