KR20180045281A - In cell touch panel and mathod for manufacturing the same - Google Patents

Abstract

The present invention relates to an in-cell touch panel capable of improving visibility by increasing an aperture ratio of pixels having a contact hole for electrical contact between touch electrodes, and a manufacturing method thereof. The in-cell touch panel of the present invention comprises: a plurality of first electrodes arranged parallel to each other in a first direction crossing an image display unit; a plurality of second electrodes arranged in parallel to cross the image display unit in a second direction intersecting the first electrodes, and separated by each of the first electrodes not to overlap with each of the first electrodes; and a plurality of contact wirings and contact holes for electrically and serially connecting the second electrodes which are adjacent to each other but separated in the same direction. Accordingly, a design structure of contact holes and contact wirings is improved to minimize reduction in an aperture ratio of each pixel, and to prevent degradation of luminance and image quality of a display image even if a contact hole is formed in a pixel region.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an in-cell touch panel,

The present invention relates to a touch panel in which touch electrodes for touch sensing are arranged, and more particularly, to an in-cell touch device capable of improving visibility by increasing an aperture ratio of pixels constituting a contact hole for electrical contact between touch electrodes Panel and a method of manufacturing the same.

2. Description of the Related Art In recent years, a touch method has been applied to a video display device widely used in mobile devices or the like, in which a region of a screen is directly selected by a finger, a stylus pen, or the like to select a predetermined object or area displayed on the screen.

The touch panel for sensing the touch is mainly applied to a flat panel display such as a liquid crystal display (LCD), an organic light emitting diode (LCD) display, and the like.

When the touch panel is applied to a liquid crystal display device, the touch panel may be an on-cell type in which the touch panel is attached to the upper surface of the liquid crystal panel, and two electrodes constituting the touch panel constitute a liquid crystal panel (In-cell type) formed on a TFT substrate. Here, two electrodes constituting the touch panel, that is, one of the touch driving electrode and the receiving electrode are formed on the TFT substrate of the liquid crystal panel and the other electrodes are formed on the upper surface of the color filter substrate of the hybrid type Hybrid type). In this way, a liquid crystal panel including an in-cell type touch panel or a hybrid type touch panel is also referred to as an in-cell touch panel.

The touch driving electrodes and the receiving electrodes of the in-cell touch panel can be designed and modified in various ways according to various implementation environments such as the layout structure of the image display pixels and the peripheral circuit configuration. In this case, the touch driving electrodes and the receiving electrodes may be divided into a plurality of units, and in the case of the electrodes adjacent to each other, they may be electrically connected through separate contact wires and contact holes.

However, if the driving electrodes and the reception electrodes arranged adjacent to each other are electrically connected to each other through separate contact holes, the aperture ratio of the pixels overlapping the contact hole configuration can not be reduced. Thus, all of the pixels whose aperture ratios are reduced have a problem in that the brightness of the peripheral pixels is lowered and the image display quality is lowered as a whole.

In general, it is desirable that the aperture ratio of the pixels displaying an image is maintained at 94% or more to maintain visibility, but the aperture ratio is currently at 92%. However, if the aperture ratio of the pixels is reduced to 12% or more by forming the contact holes, the visibility is further deteriorated to be visually perceived.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to improve the design structure of contact holes and contact wirings for electrically contacting multi-structured touch electrodes, thereby minimizing the aperture ratio reduction of each pixel, The present invention also provides a touch panel and a method of manufacturing the touch panel.

In order to minimize the reduction of the aperture ratio of each pixel and to prevent the degradation of brightness and image quality of the display image even though the contact holes and contact wirings for electrically contacting the touch electrodes are formed as described above, The object can be achieved by improving the structure. To this end, an in-cell touch panel according to the present invention includes a plurality of first electrodes arranged in parallel in a first direction so as to cross an image display unit, a plurality of second electrodes arranged in parallel in a second direction crossing the plurality of first electrodes, A plurality of second electrodes arranged parallel to each other so as not to overlap with the first electrodes and separated from each other by the first electrodes, and second electrodes formed adjacent to each other in the same direction electrically connected to each other in series, And a plurality of contact wirings and contact holes.

According to another aspect of the present invention, there is provided a method of manufacturing an in-cell touch touch panel, including forming gate and data lines in a lower array substrate, Forming a plurality of first electrodes in parallel in a first direction so as to cross the image display portion in a first manufacturing fault different from the manufacturing fault layer in which the thin film transistors are formed; A plurality of second electrodes are arranged in parallel in a second manufacturing fault layer different from the manufacturing fault layer so as to cross the image display unit in a second direction intersecting the plurality of first electrodes, And electrically connecting the second electrodes separated in the same direction to each other and electrically connected to each other in series, A plurality of contact holes to the includes the step of configuring a plurality of contact wires.

The in-cell touch panel and the method of manufacturing the same according to an embodiment of the present invention having various technical features as described above improve the design structure of the contact hole and the contact wiring for electrically contacting the multi-structured touch electrodes, The reduction of the aperture ratio of each pixel can be minimized and the visibility of the pixels can be improved.

Particularly, a multi-planar manufacturing layer can be formed so that the contact holes and the contact wirings are not affected by the peripheral wirings such as the gates, the data lines, and the pixel electrodes. In addition, by allowing each of the contact holes to be formed at a position overlapping the data line, the reduction of the aperture ratio of each pixel can be minimized, and the luminance and image quality of the display image can be prevented from deteriorating.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram specifically illustrating an in-cell touch panel according to an embodiment of the present invention; FIG.
Fig. 2 is a configuration diagram specifically showing the "AA" area in Fig.
3 is a block diagram showing the "AB" area of Fig. 2 in more detail.
Fig. 4 is a layout diagram specifically showing the "AC" pixel structure in Fig.
5 is a cross-sectional view specifically showing a cross section taken along line II 'in FIG.
FIG. 6 is a diagram illustrating a result of comparison of pixel aperture ratios according to the prior art and the application technique of the present invention.
7 is a diagram showing the results of comparison of transmittance and visibility of each pixel according to the prior art and the application technique of the present invention.

The above and other objects, features, and advantages of the present invention will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings, which are not intended to limit the scope of the present invention. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail.

Hereinafter, a touch panel and a video display device including the touch panel according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

The touch panel of the present invention can be applied to various flat panel displays such as a liquid crystal display, an organic light emitting diode display, a plasma display panel, a field emission display, And may be applied to an in-cell type display panel of a flat panel display. Hereinafter, an example in which the liquid crystal panel of the liquid crystal display device is applied as an in-cell type will be described.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram specifically illustrating an in-cell touch panel according to an embodiment of the present invention; FIG.

As shown in FIG. 1, the in-cell touch panel of the present invention is divided into an image display unit AP and an image non-display unit NP. A plurality of pixel areas are formed in the image display unit AP, A plurality of driving electrodes 120 and receiving electrodes 140 are arranged to sense a touch position between the touch sensors.

The in-cell touch panel includes a plurality of driving electrodes 120 and a plurality of receiving electrodes 140 for performing a video display function and a touch sensing function at the same time, The touch electrode is used as a common electrode while touch sensing is performed. Mutual capacitance is generated between the plurality of driving electrodes 120 and the plurality of receiving electrodes 140 disposed perpendicularly to each other between the touch detectors to measure a change amount of the mutual capacitance generated when touching It recognizes whether or not it is touch.

The plurality of driving electrodes 120 and the plurality of receiving electrodes 140 perform a function of receiving a touch driving signal and outputting a sensing signal during a touch sensing period, The input / output is controlled by a separate driving integrated circuit 190 and a touch driving integrated circuit 160.

When the in-cell touch panel, the driving module, and the back light unit are combined and made into a liquid crystal display device, the driving timing of a plurality of gate lines and data lines is controlled in the image non-display portion NP of the in- And at least one driving integrated circuit 190 for driving a plurality of gates and data lines to display an image through the pixel cells.

In addition, a predetermined driving voltage is applied to the plurality of driving electrodes 120 in the image non-display portion NP or a separate flexible circuit board, and a change in the touch sensing signal received through each receiving electrode 140 is detected And a touch driving integrated circuit 160 for determining a touch position.

The driving electrodes 120 and the receiving electrodes 140 of the in-cell touch panel may be used as a common electrode for displaying an image or may be touch-sensitive according to the control of the touch-driving integrated circuit 160. In this case, Period and the touch sensing period are time-divided so that the noise component generated in the video display period does not affect the touch sensing period.

Although not shown in detail, the in-cell touch panel is configured such that a liquid crystal layer is formed between a lower array substrate and an upper color filter substrate.

A plurality of driving electrodes 120 are arranged in parallel along the direction of the gate lines on the image display unit AP of the lower array substrate and thin film transistors and pixel electrodes And so on. A black matrix and a color filter are formed on the color filter substrate, and a plurality of receiving electrodes 140 are formed in parallel along the direction of the data lines.

As the TFTs are turned on, the pixels of each pixel region are applied with a common voltage applied to the driving electrodes 120 and the receiving electrodes 140, which are applied to the pixel electrodes and used as common electrodes, The light transmittance of the liquid crystal layer changes and an image is displayed. At this time, the plurality of driving electrodes 120 and the receiving electrodes 140 serve as common electrodes corresponding to the pixel electrodes.

On the other hand, in order to allow the plurality of driving electrodes 120 and the receiving electrodes 140 to serve as sensing electrodes of the touch panel during the touch sensing period, the plurality of driving electrodes 120 are supplied with a preset touch driving voltage (for example, Voltage or a voltage swinging around the reference voltage) is applied. Then, a touch position is determined by detecting a change in a touch sensing signal (voltage due to capacitance change) received through each receiving electrode 140.

Next, the arrangement structure of the plurality of driving electrodes 120 and receiving electrodes 140 formed in the in-cell touch panel of the present invention will be described in detail.

Fig. 2 is a configuration diagram specifically showing the "AA" area in Fig.

2, receiving electrodes 140 of the image display unit AP are formed in parallel in a first direction which is the same direction as a data line (not shown), so that the entire image display unit AP is parallel Respectively.

The driving electrodes 120 are formed in parallel in the second direction, which is the same direction as the gate lines (not shown), but are separated from each other by the receiving electrodes 140 so as not to overlap with the receiving electrodes 140.

2, each of the first driving electrodes 122 separated from the respective receiving electrodes 140 is formed in a layer different from that of each receiving electrode 140. In this case, And are connected across the respective reception electrodes 140 through the contact wires RD and the contact holes CT1.

Similarly, each of the driving electrodes 120 formed on both sides of each receiving electrode 140 is also connected to the contact wires RD formed in the manufacturing fault layer different from the respective receiving electrodes 140 and the contact holes CT1 connected in series with the other driving electrode 120 adjacent thereto.

Each of the driving electrodes 120 is arranged in series in parallel to the gate line direction so that both the contact wires RD connecting the driving electrodes 120 in series and the contact holes CT1 are connected to the same touch driving voltage . Here, each of the driving electrodes 120 is formed over several to several tens of pixel regions P, and each of the receiving electrodes 140 is formed over several to several hundreds of pixel regions P have.

1 and 2, an example in which the plurality of driving electrodes 120 are separated by the receiving electrodes 140 so as not to overlap with the receiving electrodes 140 is shown, 140 may be separated from each other by the driving electrodes 120 so as not to overlap with the driving electrodes 120.

In other words, when the plurality of receiving electrodes 140 operates as a receiving electrode for outputting a touch sensing signal, the plurality of driving electrodes 120 operate as touch driving electrodes for receiving a touch driving signal from the outside, When the receiving electrode 140 operates as a touch driving electrode supplied with a touch driving signal from the outside, the plurality of driving electrodes 120 may operate as a receiving electrode for outputting a touch sensing signal. Accordingly, each of the driving electrodes 120 and the receiving electrodes 140 may perform different operations according to input / output signals, and may have different design structures regardless of driving operations.

The contact wirings RD connecting the driving electrodes 120 in series may be formed on the uppermost manufacturing fault layer unlike the driving electrodes 120 and the receiving electrodes 140. [ Each of the contact wirings RD electrically connects the driving electrodes 120 adjacent to each other through the respective contact holes CT1 across the upper portion of the receiving electrode 140. [

Each of the contact holes CT1 is formed in each pixel region in which an image is displayed. In this case, each of the contact holes CT1 is formed in a region overlapping with the data line configuration position among the pixel regions to minimize a decrease in the aperture ratio of the pixel region, And electrically connects the wiring RD to the driving electrode 120.

3 is a block diagram showing the "AB" area of Fig. 2 in more detail.

As shown in FIG. 3, each of the contact holes CT1 must have a predetermined area or more in accordance with the areas of the contact lines RD and the driving electrodes 120. In addition, as shown in FIG. Therefore, even if the constituent area of the contact hole CT1 overlaps the data line DL as much as possible, it is inevitably overlapped with the pixel electrode formation area. In this case, since the aperture ratio of the pixel region is inevitably lowered, it is preferable that each of the contact holes CT1 is arranged in a blue pixel region in which the transmittance of the red, green, and blue pigments is the lowest, .

If the contact holes CT1 are overlapped with the pixel electrode formation regions of the respective pixel regions, the aperture ratio of the corresponding pixels is inevitably lowered. Therefore, each of the contact holes CT1 is connected to the data line DL It should be arranged at a position overlapping with a large area. It is preferable that the contact hole CT1 overlapped with the data line DL overlaps only a minimum area of the pixel electrode formation region of the pixel region. In other words, each contact hole CT1 is formed in the upper direction of the data line DL of each pixel region, and is connected to the data line DL so as to overlap the pixel electrode (PI) And the area overlapping with the area corresponding to the highest ratio can be constituted.

Fig. 4 is a layout diagram specifically showing the "AC" pixel structure in Fig. 5 is a cross-sectional view specifically showing a cross-section taken along line I-I 'of FIG.

4 and 5, an in-cell touch panel according to the present invention includes a plurality of pixel electrodes (not shown) in an area defined by a data line DL arranged to cross gate lines GL and gate lines GL, PI) is formed.

A thin film transistor Tr is formed in the first manufacturing single layer in the case of the blue pixel region of each pixel region and the thin film transistor Tr is formed from the gate electrode GE and the data line DL extending from the gate line GL An extended source electrode, a drain electrode SD connected to the pixel electrode PI through the pixel contact hole C2, and an active layer located between the source and drain electrodes.

The pixel electrode PI may be connected to the second manufacturing fault layer through the pixel contact hole C2 if the first gate insulating film and the protective film are formed to cover the entire thin film transistor Tr. Next, a second gate insulating film and a buffer PAS (Buffer PAS) 204 are formed on the second manufacturing single layer so as to cover all the pixel electrodes PI.

A plurality of driving electrodes 120 may be formed on a second gate insulating layer, which is a manufacturing single layer different from the pixel electrode PI, or a first buffer PAS (Buffer PAS) 204. Since the plurality of driving electrodes 120 may be formed in any single layer as long as it is a manufacturing single layer different from the pixel electrode PI, the manufacturing single layer can be changed in design, if necessary.

The in-cell touch panel of the present invention is a multi-planar type, and a plurality of manufacturing fault layers are formed. A second buffer PAS 203 is further formed on each of the driving electrodes 120. Each receiving electrode 140 may be formed on the second buffer PAS 203. When each receiving electrode 140 is formed, a second passivation layer 205 is formed to cover both the receiving electrode 140 and the second buffer PAS 203.

The plurality of contact holes CT1 are configured to electrically contact the respective driving electrodes 120 through the second buffer PAS 203 and the second passivation layer 205. At this time, each of the contact holes CT1 is formed at an overlapped position with the data line DL, and the respective contact wirings RD are formed on the respective contact holes CT1, 120 are electrically connected to each other.

Referring to FIG. 5, a method of manufacturing an in-cell touch panel will be described step by step.

Molybdenum (Mo) is deposited and patterned to a thickness of 2,000 to 3,000 ANGSTROM to form a gate electrode GE extending from the gate line GL and the gate line GL. Then, TEOS (Tetra Ethyl Ortho Silicate) or MTO (Middle Temperature Oxide) is deposited by CVD (Chemical Vapor Deposition) to form a gate insulating layer, and then a low temperature polysilicon (LTPS) do.

Then, the active layer of the thin film transistor Tr is formed by patterning the semiconductor layer through a photolithography process and a dry etching process. At this time, the active layer is formed to have a thickness of 500 to 1,500 ANGSTROM. Next, aluminum (Al) or molybdenum (Mo) is deposited to a thickness of 2,000 to 3,000 ANGSTROM and patterned to form source and drain electrodes.

When a thin film transistor (Tr) is formed on the first manufacturing fault layer, an insulating material such as SiO2 or SiNx is deposited to cover both the thin film transistor (Tr) and the gate insulating layer to form a first gate insulating film. The pixel electrode PI is patterned so that the pixel contact hole C2 is formed in the second manufacturing single layer and the pixel electrode PI is connected through the pixel contact hole C2 by forming a protective film by TEOS or MTO . The pixel electrode PI may be formed of a transparent conductive material such as ITO (indium tin oxide), IZO (indium zinc oxide), or ITZO (indium tin zinc oxide).

Next, a second gate insulating film and a buffer PAS (Buffer PAS) 204 are further formed on the second manufacturing single layer so as to cover all the pixel electrodes PI.

Next, a plurality of driving electrodes 120 are formed on a second gate insulating film, which is a manufacturing single layer different from the pixel electrode PI, or a first buffer PAS (Buffer PAS) 204. Each of the driving electrodes 120 may be formed of a transparent conductive material such as ITO, IZO, or ITZO.

As described above, since the driving electrodes 120 may be formed in any single layer as long as the manufacturing single layer is different from the pixel electrode PI, the manufacturing single layer can be changed in design, if necessary.

After the second buffer PAS 203 is further formed to cover both the driving electrodes 120 and the first buffer PAS, the receiving electrodes 140 are patterned on the second buffer PAS 203 do. Similarly, each receiving electrode 140 may also be formed of a transparent conductive material such as ITO, IZO, or ITZO.

When each receiving electrode 140 is formed in this way, each of the receiving electrode 140 and the second buffer PAS 203 constitutes the second protective layer 205 to be hot. The second passivation layer 205 may be formed of photo acryl, TEOS, MTO, or the like.

A plurality of contact holes CT1 are formed in the second passivation layer 205 so as to penetrate all the holes to the second buffer PAS 203 so as to be in electrical contact with the respective driving electrodes 120. [ At this time, each of the contact holes CT1 is configured in a position overlapped with the data line DL,

Thereafter, the respective contact wirings RD are formed on the respective contact holes CT1 by patterning the ITO, IZO, ITZO, or the like, so that the respective drive electrodes 120 adjacent to each other via the respective contact wirings RD, Respectively.

As described above, according to the present invention, each contact hole CT1 can be formed at an overlapped position with the data line DL in accordance with the manufacturing technology of the multiplexer type. Thus, the decrease of the aperture ratio of each pixel is minimized, and the visibility of each pixel can be improved.

In particular, it is possible to form two or more stages of manufacturing layers in a multiplexer type so that the contact holes CT and the contact wires are not influenced by the peripheral wirings such as the gate and the data lines and the pixel electrodes, And can be configured at a position overlapping with the line DL, so that the reduction of the aperture ratio of each pixel can be minimized.

FIG. 6 is a diagram illustrating a result of comparison of pixel aperture ratios according to the prior art and the application technique of the present invention.

6, when the respective contact holes CT are arranged at positions overlapping with the data lines DL, the aperture ratios of pixels constituted by the respective contact holes CT are increased by about 3.8% or more as compared with the related art Able to know. That is, the aperture ratio of the pixel in which the contact hole CT according to the related art is formed is about 48.86%, but after the improvement, the aperture ratio is about 50,73% or more, which is increased by about 3.8% or more.

In this way, in the present invention, the total aperture ratio of the pixels constituted by the respective contact holes CT can be ensured to be at least 96.24% or more, so that deterioration of the display quality can be prevented.

7 is a diagram showing the results of comparison of transmittance and visibility of each pixel according to the prior art and the application technique of the present invention.

Referring to FIG. 7, by configuring each contact hole CT at a position where it overlaps with the data line DL, the aperture ratio of the pixel in which each contact hole CT is formed increases by about 3.8% The transmittance can also be increased.

As a result of simulation, the difference in transmittance between the pixel and the adjacent pixel according to the related art is approximately 6.7%. However, after the improvement, the difference in transmittance between the pixel and the adjacent pixel is improved to about 3.3%.

In the present invention, since the transmissivity of the pixels constituted by the respective contact holes CT can be reduced within the range of 3.3% with respect to the adjacent pixels, the visibility of the pixels can be increased to prevent the luminance of the display image.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the following claims. It will be possible.

AP:
NP: image ratio display section
120: a plurality of driving electrodes
122: first driving electrode
140: a plurality of receiving electrodes
160: Touch-sensitive integrated circuit
190: drive integrated circuit

Claims (11)

A plurality of first electrodes arranged in parallel in a first direction so as to cross the image display unit;
And a plurality of second electrodes arranged in parallel to intersect the image display unit in a second direction intersecting with the plurality of first electrodes and separated by the first electrodes so as not to overlap with the first electrodes, ;
A plurality of contact wirings and a plurality of contact wirings for electrically connecting each of the second electrodes adjacent to each other in the same direction and electrically connected to each other;
In-cell touch panel.
The method according to claim 1,
Each of the contact wires
An in-cell touch formed on an upper manufacturing thin layer different from the first and second electrodes and electrically connecting the second electrodes adjacent to each other across the upper portions of the first electrodes, panel.
3. The method of claim 2,
Each of the contact holes
Each of the pixel regions being located at a position overlapping the data line in an upper direction of the data line among the pixel regions in which an image is displayed, the contact lines and the second electrodes being electrically connected to each other.
3. The method of claim 2,
Each of the contact holes
A ratio of an area overlapping with the data line is maximized so as to overlap with a pixel electrode forming area of the pixel area so as to have a small area as much as possible, Wherein the in-cell touch panel is disposed at a position overlapping with the area.
3. The method of claim 2,
Each of the contact holes
Wherein the blue pixel region is formed in at least one pixel region of blue among the red, green, and blue pixel regions in which an image is displayed, and overlaps with a data line located in at least one pixel region of blue, And the pixel area is formed so as to overlap only an area having a minimum ratio with the pixel electrode formation area of the pixel area.
3. The method of claim 2,
When the first electrode operates as a receiving electrode for outputting a touch sensing signal, the second electrode operates as a touch driving electrode for receiving a touch driving signal from the outside,
Wherein the second electrode operates as a receiving electrode for outputting a touch sensing signal when the first electrode operates as a touch driving electrode supplied with a touch driving signal from the outside.
Forming a gate and a data line in a lower array substrate, wherein the thin film transistor is formed in pixel regions defined by the gate and data lines;
Forming a plurality of first electrodes parallel to each other in a first direction so as to traverse the image display portion in a first manufacturing fault different from the manufacturing fault layer in which the thin film transistor is formed;
A plurality of second electrodes are arranged in parallel in a second manufacturing fault layer different from the manufacturing fault layer in which the plurality of first electrodes are formed so as to cross the image display unit in a second direction intersecting with the plurality of first electrodes, Separating the plurality of second electrodes so as not to overlap with the respective first electrodes; And
Forming a plurality of contact holes and a plurality of contact wirings for serially connecting the second electrodes electrically connected to each other, the second electrodes being adjacent to each other and configured in the same direction;
Wherein the in-cell touch panel is formed of a metal.
8. The method of claim 7,
Each of the contact wiring configuration steps
Each of the contact wirings is formed in a manufacturing monolayer on the upper side different from the respective first and second electrodes so that the second electrodes adjacent to each other across the upper portions of the respective first electrodes through the respective contact holes Wherein the first electrode and the second electrode are electrically connected to each other.
9. The method of claim 8,
Each of the contact hole configuration steps
Each of the contact holes may be formed at a position overlapping the data line in the upper direction of the data line among the pixel regions in which the image is displayed, so that the contact lines and the second electrodes are electrically connected to each other, A method of manufacturing a touch panel.
9. The method of claim 8,
Each of the contact hole configuration steps
Wherein each of the plurality of contact holes is formed in an upper direction of a data line of each pixel region in which an image is displayed, and each of the contact holes is overlapped with the data line Wherein the area ratio is maximized to maximize the ratio of area to area.
9. The method of claim 8,
Each of the contact hole configuration steps
Wherein each of the contact holes is formed in at least one pixel region of blue among pixel regions of red, green, and blue in which images are displayed, and each of the contact holes is connected to a data line located in at least one pixel region of blue Wherein the blue pixel region is formed in a position overlapping with a wide area, and an area corresponding to a minimum ratio is overlapped with the pixel electrode forming region of the blue pixel region.

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