KR102047726B1 - In-cell Touch Type Liquid Crystal Display and Method of fabricating the same - Google Patents

In-cell Touch Type Liquid Crystal Display and Method of fabricating the same Download PDF

Info

Publication number
KR102047726B1
KR102047726B1 KR1020130009436A KR20130009436A KR102047726B1 KR 102047726 B1 KR102047726 B1 KR 102047726B1 KR 1020130009436 A KR1020130009436 A KR 1020130009436A KR 20130009436 A KR20130009436 A KR 20130009436A KR 102047726 B1 KR102047726 B1 KR 102047726B1
Authority
KR
South Korea
Prior art keywords
substrate
liquid crystal
crystal display
type liquid
touch type
Prior art date
Application number
KR1020130009436A
Other languages
Korean (ko)
Other versions
KR20140096635A (en
Inventor
김길석
채기성
김성희
황준식
김태헌
김철홍
박귀홍
전태환
고유선
Original Assignee
엘지디스플레이 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 엘지디스플레이 주식회사 filed Critical 엘지디스플레이 주식회사
Priority to KR1020130009436A priority Critical patent/KR102047726B1/en
Publication of KR20140096635A publication Critical patent/KR20140096635A/en
Application granted granted Critical
Publication of KR102047726B1 publication Critical patent/KR102047726B1/en

Links

Images

Classifications

    • 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

Abstract

The invention and the first substrate and the second substrate spaced apart from each other; A touch electrode formed on the first substrate or the second substrate; An antistatic film formed on an outer surface of the second substrate; And a conductive member contacting the antistatic film to release static electricity to the outside, wherein the conductive member contacts the metal pad on the first substrate and the first portion in contact with the antistatic film and the antistatic film. An in-cell touch type liquid crystal display including a second portion of a form and a method of manufacturing the same. By reducing the contact resistance at the interface with the conductive member, especially the antistatic layer having a relatively high resistance, the static electricity of the in-cell touch type liquid crystal display device can be effectively removed.

Description

In-cell touch type liquid crystal display and manufacturing method {In-cell Touch Type Liquid Crystal Display and Method of fabricating the same}

The present invention relates to an in-cell touch type liquid crystal display and a manufacturing method thereof, and includes an antistatic film.

Recently, liquid crystal displays have been spotlighted as next generation advanced display devices having low power consumption, good portability, high technology value, and high added value.

Among the liquid crystal display devices, an active matrix liquid crystal display device having a thin film transistor, which is a switching element that can adjust voltage on and off for each pixel, has the highest resolution and video performance. I am getting it.

In general, a liquid crystal display device forms an array substrate and a color filter substrate through an array substrate manufacturing process for forming a thin film transistor and a pixel electrode and a color filter substrate manufacturing process for forming a color filter and a common electrode, respectively, between the two substrates. It is completed through the cell process via liquid crystal.

Currently, various structures for removing static electricity formed on the outer surface of the liquid crystal panel have been developed and used. As one example, static electricity may be removed by attaching a conductive layer and a conductive tape for removing static electricity.

1 is a cross-sectional view showing a structure of a liquid crystal panel having a conductive layer for removing static electricity in the related art. As shown in the figure, the liquid crystal panel 1 is formed by bonding the first substrate 20 and the second substrate 30 together.

A gate electrode 11 and a common electrode 5 are formed on the first substrate 20, which is a thin film transistor substrate on which the thin film transistor Tr is formed, and the gate insulating layer 22 is formed over the entire first substrate 20. ) Is formed. The semiconductor layer 12 is formed on the gate insulating layer 22 to correspond to the gate electrode 11, and the pixel electrode 7 is formed in the pixel region P. Source and drain electrodes 13 and 14 are spaced apart from each other on the semiconductor layer 12, and a protective layer 24 is formed on an entire upper surface of the source and drain electrodes 13 and 14.

The black matrix 32 and the color filter layer 34 are stacked on the inner surface of the second substrate 30. The first conductive layer 56a is formed on the inner edge of the second substrate 30, and the second conductive layer 56b is formed on the entire outer surface of the second substrate 30. The two conductive layers 56a and 56b are electrostatic removing conductive layers for removing static electricity generated in the liquid crystal panel 1. The first conductive layer 56a and the second conductive layer 56b are made of a transparent conductive material such as indium tin oxide (ITO) or indium zinc oxide (IZO). The liquid crystal layer 40 is positioned between the first substrate 2 and the second substrate 30.

Meanwhile, an electrostatic discharge metal layer 62 is formed at an edge of the first substrate 20, and a metal pad 64 is formed thereon to contact the metal layer 62 through a contact hole formed in the gate insulating layer 22. The metal pads 64 are electrically connected. In addition, silver dots 70 are disposed between the first substrate 20 and the second substrate 30 through a dotting method of a metal paste. The silver dot 70 is in contact with the first conductive layer 56a and the metal pad 64 to transfer static electricity generated on the inner surface of the second substrate 30 to the outside through the metal pad 64 and the metal layer 62. Release. Meanwhile, a conductive tape (not shown) connected to the outer case is attached to the second conductive layer 56b to remove static electricity generated on the outer surface of the second substrate 30 through the ground.

Recently, a touch type display in which a touch panel is attached to a liquid crystal panel has been introduced. The touch type display is applied to portable devices such as smart phones, tablet PCs, portable multimedia players (PMPs), and notebooks, and it is essential to reduce volume and weight. Accordingly, the demand for an in-cell touch type liquid crystal display device having a touch function mounted inside the liquid crystal panel is increasing. Since the in-cell touch type liquid crystal display device forms a touch electrode inside the liquid crystal panel without attaching a separate touch panel on the liquid crystal display device, the cost structure is improved due to the slimming of the product and the reduction of material cost, the weight reduction, and the improvement of the total light transmittance. Has advantages

However, when the prior art shown in FIG. 1 is applied to the in-cell touch type liquid crystal display, a proper discharge effect may not be obtained. This is because in the structure of the in-cell touch type liquid crystal display, an antistatic film (hereinafter, referred to as a high resistance antistatic film) having a relatively large resistance value must be used due to the sensitivity of touch sensor interference and touch sensitivity. Therefore, when the metal paste dotting portion and the high resistance antistatic film, which are used in the prior art, come into contact with each other, the contact resistance has a large value and thus the electrostatic discharge phenomenon may be delayed. In addition, in the prior art, two conductive layers (the first conductive layer 56a and the second conductive layer 56b) must be formed and then connected to each other in order to discharge static electricity generated from the inside and the outside of the liquid crystal panel. There is a problem that the process cost, time, etc. increases.

In order to solve the above problems, an object of the present invention is to provide an in-cell touch type liquid crystal display device and a method of manufacturing the same to reduce the time and the process cost, maintain the touch sensitivity and lower the contact resistance to facilitate the discharge of static electricity.

According to an aspect of the present invention, there is provided an in-cell touch type liquid crystal display device comprising: a first substrate having a thin film transistor, a pixel electrode, and a common electrode formed on an inner surface thereof; A second substrate spaced apart from the first substrate and having a color filter formed on an inner surface thereof; A touch electrode formed on the first substrate or the second substrate; An antistatic film formed on an outer surface of the second substrate; A conductive member contacting the antistatic film to discharge static electricity to the outside; The conductive member may include a first portion having a dot shape in contact with the metal pad and the antistatic layer on the first substrate, and a second portion having a rod shape in contact with the antistatic layer.

At this time, the antistatic film is made of an organic or inorganic conductive material, such as conductive polymer, silver nanoparticles, graphene, carbon nanotubes, the sheet resistance has a value of 80 ~ 2000 MΩ / □. And the first portion of the conductive member is characterized in that the number of one or more than less than ten.

An in-cell touch type liquid crystal display device manufacturing method according to an embodiment of the present invention comprises the steps of forming a thin film transistor, a pixel electrode and a common electrode on a first substrate; Forming a color filter on the second substrate; Forming a touch electrode on the first substrate or the second substrate; Bonding the first substrate and the second substrate to each other; Forming an antistatic film on an outer surface of the second substrate; And forming a conductive member contacting the antistatic film to release static electricity to the outside, wherein the conductive member contacts the metal pad and the antistatic film on the first substrate and the antistatic film. And forming a rod-shaped second portion.

At this time, the sheet resistance of the antistatic film has a value of 80 ~ 2000 MΩ / □, coating a metal paste made of a mixture of organic or inorganic conductive materials such as conductive polymers, silver nanoparticles, graphene, carbon nanotubes and the matrix Is formed. The material of the matrix is an organic or inorganic matrix such as Tetra-Ethyl-ortho-silicate, polysilane, polysilazane, or the like, or is formed of a nonconductive cured polymer. In addition, the conductive member is formed through an inkjet printing or masking method.

As described above, when the antistatic film is formed of a relatively high resistive material in the in-cell touch type liquid crystal display, the touch sensitivity can be maintained. At this time, by using a conductive member in the form of a rod to reduce the contact resistance with the antistatic film to enhance the effect and performance of the electrostatic discharge.

1 is a structural cross-sectional view of a liquid crystal panel having a conductive layer for removing static electricity in the related art.
2 is a schematic cross-sectional view of an in-cell touch type liquid crystal display device according to the present invention;
3 is a cross-sectional view of a pixel area of an array substrate of an in-cell touch type liquid crystal display device according to the present invention;
4 is a schematic plan view of an in-cell touch type liquid crystal display device according to the present invention;

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

2 is a cross-sectional view schematically showing the structure of an in-cell touch type liquid crystal display device according to the present invention. As illustrated, a first touch electrode 151 and a second touch electrode 152 for touch recognition are disposed on the first substrate 120 on which the thin film transistor is formed, and at the edge of the first substrate 120. Metal pads 162 are formed. The first and second touch electrodes 151 and 152 may be formed of any one of a transparent conductive material such as indium tin oxide (ITO) and indium zinc oxide (IZO) or an opaque conductive material.

Although not shown, the liquid crystal layer 140 is positioned between the second substrate 130, which is a color filter substrate including a black matrix and a color filter, and the first substrate 120. An antistatic film 156 having a surface resistance of 80 to 2000 M 기 / □ is formed on the outer surface of the second substrate 130. The antistatic film 156 may include an organic or inorganic conductive material such as a conductive polymer, silver nanoparticles, graphene, and carbon nanotubes. In addition, the antistatic film 156 may be formed by coating and then curing a paste, which is a mixture of a conductive material and a matrix. The matrix at this time is an organic or inorganic matrix such as Tetra-Ethyl-ortho-silicate, Polysilane, Polysilazane, and various non-conductive cured polymers.

The conductive member 170 formed of a metal material such as gold, silver, or copper by inkjet printing or a masking method of blocking external influences connects the antistatic film 156 and the metal pad 162 to each other. It is disposed at the edges of the first and second substrates 120 and 130. The conductive member 170 contacts the antistatic layer 156 while covering the outer edge of the antistatic layer 156 and is electrically connected to the metal pad 162 to be formed on the second substrate 130. It serves as a path to discharge static electricity to the outside of the device. Although the conductive member 170 is described as being in direct contact with the metal pad 162, an insulating film having a contact hole is formed on the metal pad 162, and the metal pad 162 is formed through the contact hole on the insulating film. An electrode in contact with the electrode may be formed so that the conductive member 170 may contact the electrode.

3 is a cross-sectional view of a pixel region structure of an array substrate of an in-cell touch type liquid crystal display according to an exemplary embodiment of the present invention. The first substrate 120 is a thin film transistor substrate on which a thin film transistor Tr is formed. The thin film transistor Tr is formed at an intersection area of the gate line (not shown) and the data line (not shown) in the pixel. The thin film transistor Tr may include a gate electrode 111 formed on the first substrate 120, a gate insulating layer 122 stacked over the gate electrode 111, and the gate insulating layer 122. The semiconductor layer 112 may be formed to correspond to the gate electrode 111, and the source and drain electrodes 113 and 114 may be spaced apart from each other on the semiconductor layer 112. The pixel electrode 105 formed on the gate insulating layer 122, the protection layer 124 formed on the pixel electrode 105, and the common electrode 107 are formed on the protection layer 124. The common electrode 107 overlaps the pixel electrode 105 and has a plurality of openings corresponding to the pixel electrode 105.

This structure has an advantage of wide viewing angle and high transmittance in AH-IPS (Advanced Horizontal In-Plane Switching) mode. The present invention is not limited to the structure of the array substrate shown, but can be variously changed. For example, the positions of the common electrode 107 and the pixel electrode 105 may be changed.

In addition, the first touch electrode 151 and the second touch electrode 152 illustrated in FIG. 2 are positioned on the first substrate 120 of FIG. 3 and electrically connected to each other. The electrodes 151 and 152 may be selectively formed inside the first substrate 120 or the second substrate 130.

4 is a plan view from above of the structure of an in-cell touch type liquid crystal display device according to the present invention; The in-cell touch type liquid crystal display includes a first substrate 120 and a second substrate 130 bonded together, and an active area AA and an inactive edge of the active area AA where an image is displayed. It includes a non-active area (NAA). The conductive member 170 positioned in the non-active area NAA includes a first portion 172 in the form of a dot and a second portion 174 in the form of a bar. In this case, the length of the second portion 174 is greater than the length of the first portion 172 along the first direction parallel to the first and second substrates 120 and 130, and the first and second substrates 120, A width of the second portion 174 is smaller than a width of the first portion 172 along a second direction parallel to 130 and perpendicular to the first direction. As shown in FIG. 2, the first portion 172 is formed on the inner surface of the first substrate 120 and the outer surface of the second substrate 130 to contact them with the antistatic film 156 and the metal pad 162. Connect it. The first portion 172, which is an electrostatic discharge passage, may be one as shown, or may have a number of two or more and less than ten. The position when the first portion 172 is two may be outside the both sides of the second substrate 130, but is not limited thereto.

In the in-cell touch type liquid crystal display according to the present invention, a high resistance antistatic film having a touch sensitivity of about 80 to 2000 M 을 / □ should be used. When the surface resistance of the general touch panel is lower than 80 MΩ / □, the electrostatic discharge effect is excellent but the touch sensitivity decreases. On the contrary, the material having the surface resistance of 2000 MΩ / □ or higher has excellent touch sensitivity, but the electrostatic discharge phenomenon is late. The effect of the discharge is reduced. In the case of manufacturing the antistatic film used in the existing display equipment, the antistatic film and the metal pad are connected in the same form as the first portion 172 by using the dotting method of the metal paste. As in the prior art, when the first portion 172 and the high resistance antistatic film of 80 to 2000 MΩ / □ are connected, the contact resistance has a large value of 2000 MΩ / □ or more. This means a reduction of the electrostatic discharge effect. Therefore, as the second portion 174 adjusts the patterning of the metal paste in the form of a rod, as the area of the metal paste increases, the contact resistance with the antistatic film is reduced, thereby making a high reliability antistatic film. At this time, the width of the second portion 174 may be located at the edge of the antistatic film 156 in the range of 0.1 ~ 10000 mm², the height is 0.01 ~ 10 mm.

The height of the cross section of the conductive member 170 is equal to or higher than the sum of the heights of the cross sections of the second substrate 130 and the second portion 174.

The embodiments are only intended to describe preferred embodiments of the present invention, but the present invention is not limited to these embodiments. Positions and sizes of the pixel area and the common electrode may be changed, and positions of the first and second touch electrodes may also be changed. In addition, the first and second touch electrodes may or may not have a rod shape in some cases. That is, the first and second touch electrodes are not limited to the structure shown in FIG. 2.

120: first substrate 172: first portion
130: second substrate 174: second part
156: antistatic film AA: active area
170: conductive member NAA: inactive area

Claims (11)

A first substrate having a thin film transistor, a pixel electrode, and a common electrode formed on an inner surface thereof;
A second substrate spaced apart from the first substrate and having a color filter formed on an inner surface thereof;
A touch electrode formed on the first substrate or the second substrate;
An antistatic film formed on an outer surface of the second substrate;
And a conductive member contacting the antistatic film to discharge static electricity to the outside,
The conductive member may include a first portion having a dot shape contacting the metal pad on the first substrate and the antistatic film, and a rod extending in a first direction in contact with the antistatic film and parallel to the first and second substrates. An in-cell touch type liquid crystal display comprising a second portion of a form.
The method according to claim 1,
An in-cell touch type liquid crystal display device having a sheet resistance of the antistatic film having a value of 80 to 2000 MΩ / □.
The method according to claim 1,
The antistatic layer is an in-cell touch type liquid crystal display device comprising an organic or inorganic conductive material, such as a conductive polymer, silver nanoparticles, graphene, carbon nanotubes.
The method according to claim 1,
And at least one first portion of the conductive member is less than ten.
Forming a thin film transistor, a pixel electrode and a common electrode on the first substrate;
Forming a color filter on the second substrate;
Forming a touch electrode on the first substrate or the second substrate;
Bonding the first substrate and the second substrate to each other;
Forming an antistatic film on an outer surface of the second substrate;
Forming a conductive member in contact with the antistatic film to discharge static electricity to the outside;
The conductive member may include a first portion having a dot shape contacting the metal pad on the first substrate and the antistatic film, and a rod extending in a first direction in contact with the antistatic film and parallel to the first and second substrates. A method for manufacturing an in-cell touch type liquid crystal display device comprising a second portion of a form.
The method according to claim 5,
The sheet resistance of the anti-static film has a value of 80 ~ 2000 MΩ / □ The manufacturing method of the in-cell touch type liquid crystal display device.
The method according to claim 5,
The conducting member is a manufacturing method of the in-cell touch type liquid crystal display device, characterized in that formed by inkjet printing or masking method.
The method according to claim 5,
The antistatic film is a method of manufacturing an in-cell touch type liquid crystal display device formed by coating a metal paste made of a mixture of organic or inorganic conductive materials, such as conductive polymers, silver nanoparticles, graphene, carbon nanotubes and the matrix.
The method according to claim 8,
The matrix is an organic or inorganic matrix such as Tetra-Ethyl-ortho-silicate, Polysilane, Polysilazane, or an in-cell touch type liquid crystal display device formed of a nonconductive cured polymer. Manufacturing method. The method according to claim 5,
The length of the second portion along the first direction is greater than the length of the first portion, the width of the second portion along a second direction parallel to the first and second substrates and perpendicular to the first direction. Is a manufacturing method of an in-cell touch type liquid crystal display device smaller than the width of the first portion.
The method according to claim 1,
The length of the second portion along the first direction is greater than the length of the first portion, the width of the second portion along a second direction parallel to the first and second substrates and perpendicular to the first direction. Is an in-cell touch type liquid crystal display smaller than the width of the first portion.
KR1020130009436A 2013-01-28 2013-01-28 In-cell Touch Type Liquid Crystal Display and Method of fabricating the same KR102047726B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020130009436A KR102047726B1 (en) 2013-01-28 2013-01-28 In-cell Touch Type Liquid Crystal Display and Method of fabricating the same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020130009436A KR102047726B1 (en) 2013-01-28 2013-01-28 In-cell Touch Type Liquid Crystal Display and Method of fabricating the same

Publications (2)

Publication Number Publication Date
KR20140096635A KR20140096635A (en) 2014-08-06
KR102047726B1 true KR102047726B1 (en) 2019-11-22

Family

ID=51744446

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020130009436A KR102047726B1 (en) 2013-01-28 2013-01-28 In-cell Touch Type Liquid Crystal Display and Method of fabricating the same

Country Status (1)

Country Link
KR (1) KR102047726B1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104503015A (en) * 2014-12-26 2015-04-08 京东方科技集团股份有限公司 Polarizer, production method thereof, display panel and display device
JP6849481B2 (en) * 2017-03-02 2021-03-24 株式会社ジャパンディスプレイ Detection device and display device
CN109212849B (en) 2017-07-03 2020-11-03 京东方科技集团股份有限公司 Display panel, manufacturing method thereof and display device
CN109256040B (en) * 2018-10-26 2020-12-18 厦门天马微电子有限公司 Display panel and display device

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101340052B1 (en) * 2007-08-24 2013-12-11 삼성디스플레이 주식회사 Liquid crystal display panel and method of manufacturing the same
KR101601059B1 (en) * 2009-09-29 2016-03-09 엘지디스플레이 주식회사 In-plane switching mode liquid crystal display device
KR101712438B1 (en) * 2010-06-04 2017-03-06 엘지디스플레이 주식회사 In-plane switching mode liquid crystal display device having touch sensing function and method of fabricating the same

Also Published As

Publication number Publication date
KR20140096635A (en) 2014-08-06

Similar Documents

Publication Publication Date Title
US11340741B2 (en) Touch window having a sensing electrode with a variable width of a conductive line
US11042241B2 (en) Display device including touch sensor and driving method thereof
US10019124B2 (en) Touch window
EP3680759B1 (en) Touch substrate and preparation method therefor, and display panel
EP3193244B1 (en) Display device and method of manufacturing the same
US10073573B2 (en) Conductive sheet, capacitive touch panel, display device
US20190187846A1 (en) Touch film, touch panel and touch display device
CN109388294B (en) Touch panel, manufacturing method thereof and touch display device
US10613694B2 (en) Touch panel, touch display panel using same, and method for making same
US9552090B2 (en) Touch panel and display with the same
TWI553711B (en) Touch panel and method for manufacturing the same
WO2017076071A1 (en) Array substrate and tft display device comprising array substrate
US10606388B2 (en) Array substrate, manufacturing method thereof and touch display panel
CN105138188A (en) Color film substrate, display panel and display device
US20230147291A1 (en) Touch substrate, display panel, and touch display device
US10061463B2 (en) Touch panel and display device including the same
WO2022193692A1 (en) Display panel and display device
KR102047726B1 (en) In-cell Touch Type Liquid Crystal Display and Method of fabricating the same
US10620735B2 (en) Force touch module, manufacturing method thereof, display screen and display device
EP3193243B1 (en) Display device and method of manufacturing the same
CN206339952U (en) Touch control display apparatus and its display module
US9977552B2 (en) Touch control device
TWI595298B (en) Display panel
JP2019091149A (en) Touch sensor and touch sensor assembly

Legal Events

Date Code Title Description
A201 Request for examination
E902 Notification of reason for refusal
E701 Decision to grant or registration of patent right
GRNT Written decision to grant