KR102047727B1 - Touch sensor in-cell type liquid crystal display device and method of fabricating the same - Google Patents
Touch sensor in-cell type liquid crystal display device and method of fabricating the same Download PDFInfo
- Publication number
- KR102047727B1 KR102047727B1 KR1020120157722A KR20120157722A KR102047727B1 KR 102047727 B1 KR102047727 B1 KR 102047727B1 KR 1020120157722 A KR1020120157722 A KR 1020120157722A KR 20120157722 A KR20120157722 A KR 20120157722A KR 102047727 B1 KR102047727 B1 KR 102047727B1
- Authority
- KR
- South Korea
- Prior art keywords
- touch
- pixel
- wiring
- electrode
- liquid crystal
- Prior art date
Links
Images
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
- G02F1/1362—Active matrix addressed cells
- G02F1/1368—Active matrix addressed cells in which the switching element is a three-electrode device
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/13338—Input devices, e.g. touch panels
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1343—Electrodes
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Crystallography & Structural Chemistry (AREA)
- Chemical & Material Sciences (AREA)
- Mathematical Physics (AREA)
- General Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Liquid Crystal (AREA)
- Human Computer Interaction (AREA)
- Microelectronics & Electronic Packaging (AREA)
Abstract
The present invention provides a display device comprising: gate and data lines formed to cross each other at a boundary of each pixel region on a substrate on which a plurality of touch blocks that group a plurality of pixel regions in a display region are defined; A thin film transistor connected to the gate and data line in each pixel area; A pixel electrode connected to the drain electrode of the thin film transistor and formed in each pixel region; A touch wiring formed in one direction between the pixel electrodes corresponding to a boundary of the pixel area; A first protective layer formed over the pixel electrode and the touch wiring; A plurality of first openings having a bar shape are formed on the first passivation layer for each touch block, and a plurality of first openings having a bar shape correspond to each pixel area, and a second opening is formed with respect to the touch wiring in the same shape as the first opening. The present invention provides an array substrate for a touch in-cell type liquid crystal display device including a common electrode.
Description
The present invention relates to a liquid crystal display device, and more particularly, to an array substrate for a touch sensor in-cell type liquid crystal display device capable of improving touch sensitivity by minimizing capacitance due to touch wiring.
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 control voltage on and off for each pixel, has the best resolution and video performance. I am getting it.
In general, an LCD 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, and between the two substrates. It completes through the cell process through liquid crystal in the process.
In more detail, referring to FIG. 1, which is an exploded perspective view of a general liquid crystal display, the
In addition, the upper
Although not shown in the drawings, each of the two
In addition, a back-light is provided on the outer surface of the array substrate to supply light. The on / off signals of the thin film transistor T are sequentially scanned by the
The liquid crystal display device having such a configuration is operated in the TN mode, the transverse electric field mode, and the fringe field switching mode for the arrangement method of the pixel electrode and the common electrode.
On the other hand, the liquid crystal display having the above-described configuration is used in a variety of applications such as TV, projector, mobile phone, PDA, etc. These applications are recently equipped with a touch function to operate by touching the screen recently to be.
In this case, the liquid crystal display device having the touch function is referred to as a touch in-cell type liquid crystal display device.
Accordingly, the touch in-cell type liquid crystal display device having a touch function as compared to a general liquid crystal display device without a touch function is an example of the above-described components. Configuration is required.
FIG. 2 is a plan view of a portion of a display area in a conventional array substrate for a liquid crystal display device with a built-in touch function, showing touch wiring and peripheral components thereof, and FIG. 3 is a cut line III-III of FIG. FIG. 3 is a cross-sectional view of the cut portion and shows only a portion where the pixel electrode and the common electrode are formed.
As shown, the touch wiring extends in one direction, and the
In this case, the
On the other hand, as described above, the
The
However, in view of touch performance, the second
Therefore, when a touch in-cell type liquid crystal display array substrate is implemented by using a configuration of an array substrate for a liquid crystal display device operating in a conventional fringe field switching mode, there is a problem in that touch sensitivity is lowered.
In order to solve the above problems, in the present invention, the storage capacitance between the common electrode and the pixel electrode reduces the parasitic capacitance generated between the touch wiring and the common electrode while maintaining the level of a general fringe field switching mode liquid crystal display substrate. It is an object of the present invention to provide an array substrate for a touch in-cell type fringe field switching mode liquid crystal display device that can be improved.
In order to achieve the above object, an array substrate for a touch in-cell type fringe field switching mode liquid crystal display device according to an exemplary embodiment of the present invention may include pixels on a substrate on which a plurality of touch blocks in which a plurality of pixel regions are grouped in a display region are defined. Gate and data lines formed to cross each other at the boundary of the region; A thin film transistor connected to the gate and data line in each pixel area; A pixel electrode connected to the drain electrode of the thin film transistor and formed in each pixel region; A touch wiring formed in one direction between the pixel electrodes corresponding to a boundary of the pixel area; A first protective layer formed over the pixel electrode and the touch wiring; A plurality of first openings having a bar shape are formed on the first passivation layer for each touch block, and a plurality of first openings having a bar shape correspond to each pixel area, and a second opening is formed with respect to the touch wiring in the same shape as the first opening. It includes a common electrode characterized in that formed.
In this case, the second opening is formed to be spaced apart from each pixel area by the number of pixel areas arranged in the longitudinal direction of the second opening in the common electrode positioned in one touch block.
The touch wiring is formed to overlap the data wiring or the gate wiring.
In addition, the touch wiring is connected to the common electrode provided in any one of the touch block of each of the touch block, wherein the first protective layer is provided with a touch contact hole for exposing the touch wiring, the touch contact The touch wires and the common electrode provided in any one of the touch blocks through the holes are in contact with each other.
A second protective layer covering the thin film transistor and having a flat surface is formed. The pixel electrode and the touch wiring are formed on the second protective layer, and the drain electrode of the thin film transistor is formed on the second protective layer. A drain contact hole for exposing is provided, and the pixel electrode and the drain electrode contact each other through the drain contact hole.
The array substrate for the touch in-cell type fringe field switching mode liquid crystal display according to the exemplary embodiment of the present invention reduces the overlap area between the common electrode and the touch wiring provided in each touch block, thereby reducing the touch wiring and the common electrode in the touch block. The parasitic capacitance due to overlapping is reduced, and the capacitance load between the touch blocks is reduced.
In addition, when the capacitance load between the touch wire and the common electrode in the other touch block is reduced, the number of touch sensing can be reduced by increasing the signal level (touch sensitivity) generated when the user touches, thereby reducing driving power. .
In addition, the touch driving time can be reduced by reducing the number of touch sensing, and thus the touch in-cell type fringe field switching mode liquid crystal display device having a large display area can be realized.
1 is an exploded perspective view of a general liquid crystal display device.
FIG. 2 is a plan view of a portion of a display area in a liquid crystal display array substrate having a conventional touch function and showing touch wiring and peripheral components thereof. FIG.
3 is a cross-sectional view of a portion taken along the cutting line III-III of FIG. 2 and illustrates only a portion where a pixel electrode and a common electrode are formed.
4 is a schematic plan view of a portion of a display area of an array substrate for a touch in-cell type liquid crystal display according to an exemplary embodiment of the present invention.
FIG. 5 is an enlarged view of area A of FIG. 4; FIG.
FIG. 6 is a cross-sectional view of a portion cut along the cutting line VI-VI in FIG. 5; FIG.
Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.
4 is a schematic plan view of a portion of a display area of an array substrate for a touch in-cell type liquid crystal display according to an exemplary embodiment of the present invention, FIG. 5 is an enlarged view of area A of FIG. 4, and FIG. It is sectional drawing about the part cut along the cutting line VI-VI.
As shown, in the
In addition, the display area including the plurality of pixel areas P is blocked by forming a plurality of pixel areas P adjacent to each other up and down as a group to form a touch block TB. A
In this way, between the
That is, when the
That is, the
A touch in-cell type liquid crystal display (not shown) including an array substrate according to an embodiment of the present invention having the above-described configuration displays an image by supplying a common voltage to the
Therefore, when the user touches the display area using a finger, touch capacitance is formed between the
At this time, by comparing the touch capacitance and the reference capacitance to recognize the coordinates of the portion where the user's touch occurs, the operation appears in the coordinates of the touch generating portion.
Accordingly, the
In this case, a capacitor is formed by forming a first electrode / dielectric layer / second electrode with the
Therefore, the capacitance generated between the
Therefore, in the
In this case, the second opening op2 is disposed in the same touch block TB in the longitudinal direction of the second opening op2 in the
In the portion where the
In this case, it is one touch block TB that does not form a bar-shaped second opening op2 with respect to the
On the other hand, when each
Hereinafter, the configuration of the array substrate for the in-cell fringe field switching mode liquid crystal display device according to the embodiment of the present invention will be described in more detail.
In the display area of the in-cell type fringe field switching mode liquid crystal
In addition, each pixel area P defined as an area surrounded by the plurality of
In this case, the thin film transistor Tr includes a gate electrode 107, a
The thin film transistor Tr constituting such a structure has a bottom gate type structure in which the gate electrode 107 is located at the lowermost portion.
Meanwhile, the thin film transistor Tr may be configured to have a top gate structure by including a polysilicon semiconductor layer (not shown) at the bottom of the
In this case, the thin film transistor Tr may include a semiconductor layer (not shown) including an active region (not shown) of pure polysilicon, a source and a drain region (not shown) of polysilicon doped with impurities on both sides thereof, and a gate. An interlayer insulating film having an insulating film (not shown), a gate electrode (not shown) overlapping the active region (not shown), and a semiconductor layer contact hole (not shown) exposing the source and drain regions (not shown) (Not shown) and source and drain electrodes (not shown) formed in contact with the source and drain regions (not shown), respectively, and spaced apart from each other through the semiconductor layer contact holes (not shown).
When the thin film transistor Tr forms the top gate structure, an interlayer insulating film (not shown) is further provided as compared to the bottom gate structure, and the
Meanwhile, the first protective layer includes a
In addition, the
In the
In this case, the
In addition, a second
In addition, an upper portion of the
The
Furthermore, the most characteristic configuration of the
The
Accordingly, since parasitic capacitance due to overlapping of the
When the capacitance load between the
In addition, the touch driving time can be reduced by reducing the number of touch sensing, and thus the touch in-cell type fringe field switching mode liquid crystal display device having a large display area can be realized.
Experimentally, compared to the
Therefore, it was confirmed experimentally that the embodiment of the present invention has an effect of reducing the capacitance load between the touch wiring and the common electrode by 48% compared to the comparative example.
When the capacitance load values generated between the touch wiring and the common electrode are 0fF, 32fF, and 65fF, the simulation result shows that the signal level (touch sensitivity) is 40A.U., and the capacitance load value is 32fF and For 62fF, 33A.U. And 26A.U.
therefore. When the capacitance load value between the touch wiring and the common electrode according to the comparative example was 100% in the signal level (touch sensitivity), the embodiment of the present invention became 127%, indicating that the signal level was improved by about 26%. have.
The present invention is not limited to the above-described embodiments, and various changes and modifications can be made without departing from the spirit of the present invention.
101: substrate
110: gate insulating film
120: semiconductor layer
120a: active layer
120b: ohmic contact layer
130: data wiring
133: source electrode
136: drain electrode
140: first protective layer
143: drain contact hole
160: pixel electrode
165: touch wiring
168: second protective layer
170: common electrode
Tr: Thin Film Transistor
Claims (8)
A thin film transistor connected to the gate and data line in each pixel area;
A pixel electrode connected to the drain electrode of the thin film transistor and formed in each pixel region;
A touch wiring formed in one direction between the pixel electrodes corresponding to a boundary of the pixel area;
A second protective layer formed over the pixel electrode and the touch wiring;
A plurality of first openings having a bar shape are formed on the second passivation layer for each touch block, and a plurality of first openings having a bar shape correspond to each pixel area. Common electrode characterized by formed
Array substrate for a touch in-cell type liquid crystal display device comprising a.
Wherein the second openings are formed in the common electrode positioned in one touch block and are spaced apart from each pixel area by the number of pixel areas arranged in the longitudinal direction of the second opening. Board.
And the touch wiring overlaps with the data wiring or the gate wiring.
And the touch wiring is connected to a common electrode provided in any one of the touch blocks.
The second protective layer is provided with a touch contact hole exposing the touch wiring, and the common electrode provided in one of the touch blocks of the touch block and the touch block is in contact with each other through the touch contact hole. Array substrate for in-touch in-cell type liquid crystal display device.
A first protective layer covering the thin film transistor and having a flat surface is formed.
The pixel electrode and the touch wiring are formed on the first protective layer,
The first protective layer includes a drain contact hole exposing a drain electrode of the thin film transistor, and the pixel electrode and the drain electrode contact each other through the drain contact hole. .
And the second opening exposes an upper surface of the second passivation layer directly on the touch wiring.
And a width of the second opening is wider than a width of the touch wiring.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020120157722A KR102047727B1 (en) | 2012-12-29 | 2012-12-29 | Touch sensor in-cell type liquid crystal display device and method of fabricating the same |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020120157722A KR102047727B1 (en) | 2012-12-29 | 2012-12-29 | Touch sensor in-cell type liquid crystal display device and method of fabricating the same |
Publications (2)
Publication Number | Publication Date |
---|---|
KR20140087431A KR20140087431A (en) | 2014-07-09 |
KR102047727B1 true KR102047727B1 (en) | 2019-11-22 |
Family
ID=51736351
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1020120157722A KR102047727B1 (en) | 2012-12-29 | 2012-12-29 | Touch sensor in-cell type liquid crystal display device and method of fabricating the same |
Country Status (1)
Country | Link |
---|---|
KR (1) | KR102047727B1 (en) |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101655410B1 (en) * | 2014-08-26 | 2016-09-07 | 엘지디스플레이 주식회사 | In-cell Touch type liquid crystal display device |
KR102243954B1 (en) * | 2014-12-26 | 2021-04-23 | 엘지디스플레이 주식회사 | In-Cell Touch Type Display Device and Method for Manufacturing the same |
CN105843433B (en) | 2015-01-30 | 2019-01-18 | 乐金显示有限公司 | Touch display equipment |
KR102246696B1 (en) * | 2015-01-30 | 2021-04-30 | 엘지디스플레이 주식회사 | In-Cell Touch Type Display Device and Method for Manufacturing the same |
TWI587199B (en) * | 2015-04-01 | 2017-06-11 | 友達光電股份有限公司 | Display device |
CN104915054B (en) | 2015-05-14 | 2019-10-15 | 京东方科技集团股份有限公司 | Array substrate and preparation method thereof and display device |
US10139663B2 (en) * | 2015-05-29 | 2018-11-27 | Semiconductor Energy Laboratory Co., Ltd. | Input/output device and electronic device |
KR102490623B1 (en) * | 2015-06-26 | 2023-01-25 | 엘지디스플레이 주식회사 | Organic Light Emitting Display Device and Menufacturing Method the same |
KR102384252B1 (en) * | 2015-08-31 | 2022-04-08 | 삼성디스플레이 주식회사 | Array substrate for touch sensor in-cell type display device and manufacturing method of the same |
CN105182633A (en) * | 2015-09-07 | 2015-12-23 | 武汉华星光电技术有限公司 | Array substrate and touch display device |
CN107765489A (en) * | 2017-11-16 | 2018-03-06 | 南京中电熊猫平板显示科技有限公司 | A kind of touch-control display panel |
CN108874232B (en) * | 2018-07-26 | 2021-03-02 | 京东方科技集团股份有限公司 | Array substrate and display panel |
CN112216731B (en) * | 2020-10-13 | 2022-10-14 | 云谷(固安)科技有限公司 | Display panel, preparation method thereof and display device |
CN113012620B (en) * | 2021-03-26 | 2022-05-17 | 合肥维信诺科技有限公司 | Display panel |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20110135131A (en) * | 2010-06-10 | 2011-12-16 | 엘지디스플레이 주식회사 | Liquid crystal display device having touch sensing function |
KR101520423B1 (en) * | 2011-04-21 | 2015-05-14 | 엘지디스플레이 주식회사 | Touch sensor in-cell type liquid crystal display device and method of fabricating the same |
-
2012
- 2012-12-29 KR KR1020120157722A patent/KR102047727B1/en active IP Right Grant
Also Published As
Publication number | Publication date |
---|---|
KR20140087431A (en) | 2014-07-09 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
KR102047727B1 (en) | Touch sensor in-cell type liquid crystal display device and method of fabricating the same | |
KR101891985B1 (en) | Liquid crystal display device | |
KR101564332B1 (en) | Touch screen panel integrated with liquid crystal display method of manufacturing the same and method of touch sensing | |
KR101546049B1 (en) | Touch display panel and driving method thereof | |
KR102320514B1 (en) | Touch type liquid crsytal display device | |
KR101395223B1 (en) | Liquid crystal display device | |
US8203682B2 (en) | Display substrate, method of manufacturing the same and display panel having the display substrate | |
KR101749146B1 (en) | Liquid crystal display device with a built-in touch screen and method for manufacturing the same | |
KR20160145121A (en) | Array substrate and manufacturing method and driving method therefor, and display device | |
KR102018740B1 (en) | Display having touch sensing function | |
US20110187669A1 (en) | Liquid crystal display device and manufacting method thereof | |
KR101305071B1 (en) | Array substrate and display panel having the same | |
KR20170039001A (en) | In-cell touch type display device | |
KR20120054838A (en) | Liquid crystal display device and method for manufacturing the same | |
KR20130036741A (en) | Color filter substrate and capacitive touch screen | |
JP2007220123A (en) | Thin film transistor display panel and display device | |
KR20090123141A (en) | Liquid crystal display device | |
KR20110075411A (en) | Touch sensor in-cell type liquid crystal display device and method of fabricating the same | |
WO2010029662A1 (en) | Display device | |
KR20140016593A (en) | Liquid crystal display and manufacturing method thereof | |
US9019221B2 (en) | Display device integrated with touch screen panel | |
KR20170076187A (en) | In-cell touch type display device | |
KR20150125160A (en) | Liquid crystal display device and method of manufacturing the same | |
CN110376814B (en) | Array substrate and embedded touch display panel | |
TW201633092A (en) | Position input device and display device fitted with position input function |
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 |