KR102424049B1 - In cell type display panel and in cell type display device using the same - Google Patents

Abstract

An object of the present invention is to provide an in-cell display panel including a touch line overlapping a plurality of touch electrodes and a dummy line overlapping two adjacent touch electrodes, and an in-cell display device using the same. To this end, in the in-cell display panel according to the present invention, data lines to which a data voltage is supplied, gate lines to which a gate pulse is supplied, independently arranged touch electrodes, and a touch line arranged to overlap the data lines. and dummy lines overlapping the data lines and arranged parallel to the touch lines.

Description

In-cell type display panel and in-cell type display device using the same

The present invention relates to a display panel, and more particularly, to an in-cell type display panel having a built-in touch panel and an in-cell type display device using the same.

The touch panel is installed in a display device such as a liquid crystal display device (LCD), an organic light emitting display device (OLED), and an electrophoretic display device (EPD), such as an electrophoretic display device (EPD). It is a type of input device that allows information to be input by directly touching a screen with a finger or a pen while looking at the display device.

In a method of manufacturing a display device having a touch panel, an add-on method in which a display panel for outputting an image and a touch panel for sensing a touch are separately manufactured and then attached, and a display in which the touch panel outputs an image An in-cell method built into the panel and the like are included.

Recently, for slimming portable terminals such as smart phones and tablet PCs, the demand for in-cell display panels using in-cell methods is increasing. A display device using an in-cell type display panel is referred to as an in-cell type display device.

1 is an exemplary diagram illustrating the configuration of a conventional in-cell type display device.

The in-cell type display panel may be divided into a self-cap method and a mutual method. 1 shows an in-cell type display panel 10 using a self-cap method. A plurality of touch electrodes 12 are disposed in the display area 11 of the in-cell display panel 10 using the self-cap method.

A touch driving signal or a common voltage is supplied from the driver IC 30 attached to the flexible printed circuit board 50 to the touch electrodes 12 .

In the image display period, a common voltage is supplied to the touch electrodes 12 through the touch lines 13 . In the touch sensing period, a touch driving signal is supplied to the touch electrodes 12 through the touch lines 13 . During the image display period, the driver IC 30 supplies data voltages to the data lines D1 to Dd provided in the in-cell type display panel 10 .

The touch lines 13 are electrically connected to any one touch electrode 12 as shown in FIG. 1 . The length of the touch line 13 is proportional to the distance between the touch electrode 12 to which the touch line is electrically connected and the driver IC 30 . For example, the length of the touch line connected to the touch electrode 12 arranged at a short distance from the driver IC 30 is the length of the touch line connected to the touch electrode 12 arranged at a far distance from the driver IC 30 . shorter than the length of In detail, the lengths of the touch lines 13 are not the same.

The in-cell type display panel 10 is provided with gate lines G1 to Gg. During the image display period, the gate driver 20 sequentially supplies gate pulses to the gate lines G1 to Gg.

The gate driver 20 may be formed in a non-display area of the in-cell type display panel 10 using a gate in panel (GIP) method.

In the conventional in-cell type display panel 10 as shown in FIG. 1 , manufactured using the gate-in-panel method, since the lengths of the touch lines 13 are different from each other, the A deviation may occur between the touch voltages.

In addition, since the touch line 13 is electrically connected to the touch electrode 12 through one contact portion M, even between common voltages applied to pixels covered by one touch electrode 12 . Deviations may occur.

In particular, in an in-cell display device using a gate-in-panel method, the gate driver 20 outputs gate pulses using two or more gate clocks having different phases. Accordingly, the gate pulses output to each gate line may overlap each other at a specific timing.

In this case, since the lengths of the touch lines 13 are different from each other, the overlapping shape of the gate lines and the touch lines 13 is different for each region of the in-cell type display panel 10 . Accordingly, the influence of the gate pulse on the common voltage may vary in each region, and accordingly, the magnitude of the common voltage may vary in each region.

Accordingly, a horizontal dim defect in which a dark stripe appears along the gate line may occur.

In particular, the horizontal dim defect may be severely generated at the interface between the touch electrodes 12 .

SUMMARY OF THE INVENTION An object of the present invention is to provide an in-cell type display panel having a touch line overlapping a plurality of touch electrodes and a dummy line overlapping two adjacent touch electrodes, and an in-cell type display using the same to provide the device.

An in-cell display device according to the present invention for achieving the above object includes an in-cell display panel, a gate driver sequentially outputting a gate pulse, and a touch driving signal using touch electrodes provided in the in-cell display panel during a touch sensing period. and a touch driver for supplying a common voltage to the touch electrodes and a data driver for outputting a data voltage during the image display period.

In order to achieve the above object, an in-cell display panel according to the present invention includes data lines to which data voltages are supplied, gate lines to which gate pulses are supplied, touch electrodes that are independently arranged, and to overlap the data lines. and dummy lines overlapping the disposed touch lines and the data lines and disposed parallel to the touch lines.

Here, each of the touch electrodes overlaps the at least two gate lines, the at least two data lines, the at least two touch lines, and the at least two dummy lines.

A first touch line, which is one of the touch lines, overlaps all of the touch electrodes disposed along the data lines among the touch electrodes.

The first touch line is electrically connected to a first touch electrode that is any one of the touch electrodes disposed along the data lines.

Among the dummy lines, first dummy lines overlapping the first touch electrode and the second touch electrode disposed adjacent to each other along the data lines may include the first one of the first touch electrode and the second touch electrode. It is electrically connected to the touch electrode.

According to the present invention, image display performance of an in-cell type display panel having a built-in gate driver can be improved.

1 is an exemplary view showing the configuration of a conventional in-cell type display device.
2 is an exemplary diagram schematically showing the configuration of an in-cell type display device according to the present invention.
3 is an exemplary view illustrating a part of an in-cell type display panel according to the present invention.
4 is an exemplary diagram illustrating waveforms of gate pulses and waveforms of common voltages generated in the in-cell display device according to the present invention.
FIG. 5 is an enlarged exemplary view of area B shown in FIG. 3 .
6 is an exemplary view showing a cross-section taken along the line K-K' of FIG.
FIG. 7 is an enlarged view of area C shown in FIG. 3 .
8 is an exemplary view showing a cross-section taken along the line L-L' shown in FIG.

Advantages and features of the present invention, and a method of achieving them will become apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in a variety of different forms, and only these embodiments allow the disclosure of the present invention to be complete, and those of ordinary skill in the art to which the present invention pertains. It is provided to fully inform the person of the scope of the invention, and the present invention is only defined by the scope of the claims.

It should be noted that in the present specification, in adding reference numbers to the components of each drawing, the same numbers are used for the same components, even if they are indicated on different drawings, as much as possible.

The shapes, sizes, ratios, angles, numbers, etc. disclosed in the drawings for explaining the embodiments of the present invention are illustrative and the present invention is not limited to the illustrated matters. Like reference numerals refer to like elements throughout. In addition, in describing the present invention, if it is determined that a detailed description of a related known technology may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted. When 'including', 'having', 'consisting', etc. mentioned in this specification are used, other parts may be added unless 'only' is used. When a component is expressed in the singular, the case in which the plural is included is included unless specifically stated otherwise.

In interpreting the components, it is interpreted as including an error range even if there is no separate explicit description.

In the case of a description of the positional relationship, for example, when the positional relationship of two parts is described as 'on', 'on', 'on', 'beside', etc., 'right' Alternatively, one or more other parts may be positioned between two parts unless 'directly' is used.

In the case of a description of a temporal relationship, for example, 'immediately' or 'directly' when a temporal relationship is described as 'after', 'following', 'after', 'before', etc. It may include cases that are not continuous unless this is used.

The term 'at least one' should be understood to include all possible combinations of one or more related items. For example, the meaning of 'at least one of the first item, the second item and the third item' is not only the first item, the second item, or the third item respectively, but also 2 of the first item, the second item and the third item. It means a combination of all items that can be presented from more than one.

Although the first, second, etc. are used to describe various components, these components are not limited by these terms. These terms are only used to distinguish one component from another. Accordingly, the first component mentioned below may be the second component within the spirit of the present invention.

Each feature of the various embodiments of the present invention may be partially or wholly combined or combined with each other, technically various interlocking and driving are possible, and each embodiment may be independently implemented with respect to each other or implemented together in a related relationship. may be

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

2 is an exemplary diagram schematically illustrating the configuration of an in-cell type display device according to the present invention.

As shown in FIG. 2, the in-cell display device according to the present invention includes an in-cell display panel 100, a gate driver 200 for sequentially outputting gate pulses, and a touch sensing period provided in the in-cell display panel. A touch driver that supplies a touch driving signal to the touch electrodes, a touch driver that supplies a common voltage to the touch electrodes during an image display period, a data driver that outputs a data voltage, and the gate driver 200, the data driver, and the touch driver It includes a control driver 400 for controlling the.

First, the in-cell type display panel 100 includes data lines D1 to Dd to which the data voltage is supplied, gate lines G1 to Gg to which the gate pulse is supplied, and the independently disposed touch electrodes ( TEs), touch lines TL overlapping the data lines D1 to Dd, and the data lines D1 to Dd overlapping the data lines D1 to Dd and being parallel to the touch lines TL. dummy lines DL are included.

Each of the touch electrodes TE overlaps the at least two gate lines, the at least two data lines, the at least two touch lines, and the at least two dummy lines.

The touch lines TL overlap all of the touch electrodes F disposed along the data lines among the touch electrodes TE, and include a first one of the touch electrodes F disposed along the data lines. It is electrically connected to the touch electrode. The touch line TL is electrically connected to the touch electrode TE through the touch contact unit TP.

Among the dummy lines DL, first dummy lines overlapping the first and second touch electrodes disposed adjacent to each other along the data lines may be selected from among the first and second touch electrodes. electrically connected to either one.

When the in-cell display panel 100 is a liquid crystal panel, the data lines D1 to Dd and the gate lines G1 to Gg are provided on a first substrate (TFT substrate) of the in-cell display panel 100 . ), pixels defined by the data lines D1 to Dd and the gate lines G1 to Gg and the touch electrodes TE are provided, and a color filter and a black matrix are provided on the second substrate CF. is provided, and liquid crystal is injected between the first substrate and the second substrate. The color filter may be provided on the first substrate. A thin film transistor (TFT) and a pixel electrode for driving the liquid crystal together with the touch electrode TE are provided in each of the pixels. For example, the pixels are arranged in a matrix form by an intersecting structure of the data lines D1 to Dd and the gate lines G1 to Gg, and in each of the pixels, the thin film transistor and the pixel electrode and a touch electrode unit constituting the touch electrode TE.

However, the in-cell type display panel 100 may be formed in various types and shapes other than the liquid crystal panel.

To the touch electrode TE, a touch driving signal is supplied during a touch sensing period and a common voltage is supplied during an image display period. Accordingly, the touch electrode also functions as a common electrode.

The touch electrodes TE are provided in the display area 110 of the in-cell type display panel 100 .

The touch electrodes TE are driven using a self-cap method.

For example, a voltage is charged in the touch electrode TE by a current or voltage supplied from the touch driver. The voltage charged in the touch electrode TE is discharged over time.

When the user's finger is in contact with the touch electrode TE, the amount of time or the discharge amount of the charging voltage is, when the user's finger does not contact the touch electrode TE, the charging voltage is It is different from the time to be discharged or the amount to be discharged.

Accordingly, the presence or absence of a touch or a touch position in the in-cell type display panel 100 may be sensed through analysis of a change in the amount of time the charging voltage is discharged or a change in the amount in which the charging voltage is discharged.

To this end, the touch driver supplies current or voltage to the touch electrodes TE through the touch lines TL, and a sensing signal transmitted from the touch electrodes TE through the touch lines TL. receive them

Also, the touch driver may analyze the sensing signals to directly determine the presence or absence of a touch or a touch position in the in-cell type display panel 100 . However, the process of determining the presence or absence of a touch or the location of a touch in the in-cell type display panel 100 may be performed in another component.

Second, the gate driver 200 sequentially outputs a gate pulse to the gate lines G1 to Gg.

The gate driver 200 shifts a gate start pulse (GSP) transmitted from the control driver 400 according to a gate shift clock (GSC), and sequentially selects the gate lines G1 . to Gg), a gate pulse having a gate-on voltage Von is supplied.

The gate driver 200 supplies the gate-off voltage Voff to the gate lines G1 to Gg during the remaining period in which the gate pulse having the gate-on voltage Von is not supplied.

After the gate driver 200 is formed of an integrated circuit (IC), the gate driver 200 may be mounted in a non-display area formed outside the display area 110 of the in-cell type display panel 100 .

In addition, the gate driver 200 includes the gate lines G1 to Gg, the data lines D1 to Dd, the touch electrodes TE, the touch lines TL, and the dummy line ( DL) may be formed during the manufacturing process. For example, the gate driver 200 may be embedded in the in-cell type display panel 100 . This type of gate driver 200 is referred to as a gate-in-panel (GIP) type gate driver.

As shown in FIG. 2 , the gate driver 200 may be disposed in only one of the non-display areas of the in-cell type display panel 100 , but two non-display areas facing each other Each of the regions may be disposed.

Third, the touch driver supplies a touch driving signal to the touch electrodes TE provided in the in-cell display panel 100 during a touch sensing period, and provides a common voltage to the touch electrodes TE during an image display period. to supply

Fourth, the data driver outputs a data voltage to the data lines D1 to D1.

After the touch driver and the data driver are independently configured, they may be mounted on the in-cell type display panel 100 .

However, after the touch driver and the data driver are configured as one driving driver, they may be mounted on the in-cell type display panel 100 . In FIG. 2 , a driving driver 300 configured by integrating the touch driver and the data driver is shown as an example of the present invention.

The driving driver 300 is connected to the touch lines TL and the data lines D1 to Dd.

The driving driver 300 supplies data voltages to the data lines D1 to Dd during the image display period. The driving driver 300 supplies a touch driving signal to the touch electrodes TE through the touch lines TL during the touch sensing period, and transmits the touch driving signal from the touch electrodes TE through the touch lines TL. Receive detection signals. Also, the driving driver 300 may determine the presence or absence of a touch or a touch position in the in-cell type display panel 100 using the sensing signals. In this case, the function of determining the presence or absence of the touch or the position of the touch may be executed by another component.

The driving driver 300 may be configured as an integrated circuit (IC). In this case, the driving driver 300 may be mounted on the flexible film 500 , and the flexible film 500 is mounted on the in-cell type display panel 100 . The driving driver 300 may be electrically connected to the data lines D1 to Dd and the touch lines TL through the flexible film 500 .

However, the driving driver 300 may be directly mounted on the in-cell type display panel 100 .

Fifth, the control driver 400 controls the gate driver 200 , the data driver, and the touch driver. When the data driver and the touch driver are included in the driving driver 300 , the control driver 400 may control functions of the driving driver 300 .

The control driver 400 may be mounted on the printed circuit board 600 . In this case, the flexible film 500 is attached to the in-cell type display panel 100 and the printed circuit board 600 . The control driver 400 may be electrically connected to the driving driver 300 through the flexible film 500 .

3 is an exemplary view illustrating a part of an in-cell type display panel according to the present invention, and in particular, an enlarged view of the S region shown in FIG. 2 . 4 is an exemplary diagram illustrating waveforms of gate pulses and waveforms of common voltages generated in the in-cell display device according to the present invention. In particular, FIG. 4A shows waveforms of gate pulses output to the gate lines covered by the first touch electrode TE1, and FIG. 4B shows the first touch electrode TE1 and the second touch electrode TE1. It is an exemplary view showing waveforms of common voltages supplied to the second touch electrode TE2. In (b) of FIG. 4 , the horizontal axis represents time, and the vertical axis represents the magnitude of the common voltage. In FIG. 3 , X denotes touch lines TL, and Y denotes dummy lines, particularly, second dummy lines DL2.

In the in-cell display panel 100 according to the present invention, as described above and shown in FIG. 3 , data lines D1 to Dd to which data voltages are supplied and gate lines G1 to G1 to gate pulses to which gate pulses are supplied. Gg), the independently disposed touch electrodes TE, the touch lines TL overlapping the data lines D1 to Dd, and the data lines D1 to Dd overlapping the touch electrodes It includes dummy lines DL arranged in parallel with the lines TL.

As shown in FIGS. 2 and 3 , each of the touch electrodes TE includes at least two of the gate lines G, at least two of the data lines, and at least two of the touch lines TL. and at least two of the dummy lines DL.

Hereinafter, as shown in FIG. 3 , when three touch electrodes are adjacent to each other, the touch electrode disposed in the center is referred to as a first touch electrode TE1, and is located at the lower end of the first touch electrode TE1. The disposed touch electrode is referred to as a second touch electrode TE2 , and the touch electrode disposed on the upper end of the first touch electrode TE1 is referred to as a third touch electrode TE3 . Here, the first, second, and third terms do not mean an arrangement order of the touch electrodes.

In addition, as shown in FIG. 3 , in the following description, when the three touch electrodes are adjacent to each other, a dummy line overlapping the first touch electrode TE1 and the second touch electrode TE2 is first formed. A dummy line DL1 is referred to as a dummy line overlapping the first touch electrode TE1 and the third touch electrode TE3, and a second dummy line DL2 is referred to as a second dummy line DL2. A dummy line overlapping the second touch electrode TE2 is referred to as a third dummy line.

In this case, the touch lines TL overlap all of the touch electrodes F disposed along the data lines among the touch electrodes TE, and touch electrodes F disposed along the data lines. of the first touch electrode TE1 is electrically connected.

For example, in FIG. 3 , one of the touch lines TL is connected to the first touch electrode TE1 through the touch contact unit TP, and another one of the touch lines TL is connected to the first touch electrode TE1 . is connected to the second touch electrode TE2 through the touch contact unit TP, and another one of the touch lines TL is connected to the third touch electrode TE3 through the touch contact unit TP. A connected in-cell type display panel is shown as an example of the present invention.

In detail, in each of the pixels covered by the first touch electrode TE1 and adjacent to the first touch line TL1 connected to the first touch electrode TE1, the first touch line ( TL1 is connected to the first touch electrode TE1 through a touch contact unit TP provided in each of the pixels. In this case, the touch contact part TP may be disposed at a position that does not overlap the gate line. Accordingly, the gate line is not affected by the touch contact portion TP, and all gate lines may be provided under equal conditions. Accordingly, gate pulses output to the gate lines may have the same characteristics.

Also, FIG. 2 shows an in-cell type display panel 100 having four touch electrodes F disposed along the data lines. Accordingly, the four touch lines TL overlap the four touch electrodes TE. Accordingly, FIG. 3 shows the first touch electrode TE1 , the second touch electrode TE2 , and the third touch electrode TE3 overlapping the four touch lines TL.

Among the dummy lines DL, first dummy lines DL1 overlapping the first and second touch electrodes TE1 and TE2 disposed adjacent to each other along the data lines may include the first It is electrically connected to any one of the touch electrode TE1 and the second touch electrode TE2. 3 , an in-cell type display panel in which the first dummy lines DL1 are connected to the first touch electrodes TE1 is illustrated as an example of the present invention.

A brief description of the development background of the present invention is as follows.

For example, if the dummy lines DL shown in FIGS. 2 and 3 overlap only one touch electrode TE, the dummy lines DL are separated from each other at the interface between the touch electrodes TE. do. In this case, the gate lines disposed on the interface between the different touch electrodes TE are affected only by one touch electrode TE. Accordingly, the touch electrode TE is also affected only by the gate pulses output from the gate lines overlapping the touch electrode TE.

Accordingly, different common voltages may be generated in regions where the touch electrodes are adjacent to each other, and thus image quality may deteriorate.

In particular, since the gate-in-panel type gate driver 200 outputs gate pulses using two or more gate clocks having different phases, gate pulses output to different gate lines may overlap each other. have.

In this case, the characteristic of the common voltage applied to the region where the gate lines covered by one touch electrode are arranged and the characteristic of the common voltage applied to the region where the gate lines covered by the other touch electrode are arranged These can be different.

In more detail, in an in-cell display panel in which the dummy lines DL are covered by any one touch electrode, particularly, in a gate-in-panel type in-cell display panel, a common voltage load applied to the gate line and the data line is increased Accordingly, a common voltage deviation may occur between the touch electrodes, and accordingly, a transverse dimming (DIM) defect may occur at the interface between the touch electrodes.

However, according to the present invention, the dummy line DL overlaps the two touch electrodes. Accordingly, there is no difference between common voltages corresponding to the gate lines disposed in the region where the two touch electrodes are adjacent to each other.

For example, assuming that the first touch electrode TE1 shown in FIG. 3 overlaps 24 gate lines, as shown in FIG. 4A , the first touch electrode TE1 The twenty-first to twenty-fourth gate pulses GP21 to GP24 outputted to the twenty-first to twenty-fourth gate lines disposed at the lower end of the may overlap each other. Also, the first gate pulses to the second gate pulses GP01 to GP02 output to the first gate line to the second gate line disposed on the upper end of the second touch electrode TE1 may overlap each other.

In this case, in the present invention, as described above, the ends of the first dummy lines DL1 covered by the first touch electrode TE1 overlap the upper end of the second touch electrode TE2. .

Accordingly, as shown in FIGS. 4A and 4B , the first to second gate pulses GP01 output to the first to second gate lines of the second touch electrode TE2. to GP02) and the waveform of the common voltage affecting the twenty-first to twenty-fourth gate pulses GP21 to GP24 of the first touch electrode TE1 have a similar shape.

Accordingly, in the entire in-cell type display panel 100 , the quality of image quality may be improved.

FIG. 5 is an enlarged view of area B shown in FIG. 3 , and FIG. 6 is an exemplary view showing a cross-section taken along line K-K' of FIG. 5 . FIG. 7 is an enlarged view of region C shown in FIG. 3 , and FIG. 8 is an exemplary view showing a cross-section taken along line L-L′ shown in FIG. 7 . In Figs. 5 and 7, TFT denotes a thin film transistor.

As described above, in the in-cell display panel 100 according to the present invention, the data lines D1 to Dd to which the data voltage is supplied, and the gate lines G1 to Gg to which the gate pulse is supplied, independently The touch electrodes TE, the touch lines TL overlapping the data lines D1 to Dd, and the data lines D1 to Dd overlap the touch lines TL. and dummy lines DL arranged in parallel with each other.

In this case, each of the touch electrodes TE includes at least two of the gate lines G, at least two of the data lines, at least two of the touch lines TL, and at least two of the dummy lines ( DL) are overlapped.

The touch lines TL overlap all of the touch electrodes F disposed along the data lines among the touch electrodes TE, and include a first one of the touch electrodes F disposed along the data lines. It is electrically connected to the touch electrode TE1.

Among the dummy lines DL, first dummy lines DL1 overlapping the first and second touch electrodes TE1 and TE2 disposed adjacent to each other along the data lines may include the first It is electrically connected to any one of the touch electrode TE1 and the second touch electrode TE2.

In particular, as shown in FIGS. 3, 5 and 6 , the first pixels P1 are covered by the first touch electrode TE1 to which the first dummy line DL1 is electrically connected. Also, the first pixels P1 are adjacent to the first data line D1 overlapping the first dummy line DL1.

In this case, some of the first pixels P1 are adjacent to the first dummy line DL1. Each of the first dummy lines DL1 includes a dummy contact part R provided in first pixels P1 adjacent to the first dummy line DL1 among the first pixels P1 . are electrically connected to the first touch electrode TE1 through the

In FIG. 6 showing a cross-section of a region in which the dummy contact portion R is formed, reference numeral 111 denotes a base substrate, 112 denotes a gate insulating layer, 113 denotes a first protective layer, 114 denotes an insulating layer, and 115 denotes a second is a protective film

A first touch electrode part TEP1 constituting the first touch electrode TE1 and a connection part CP connected to the first touch electrode part TEP1 are provided on an upper end of the second passivation layer 115 .

The first touch electrode part TEP1 is a part of the first touch electrode TE and is provided in the first pixel. The liquid crystal is driven by the first touch electrode part TEP1 and the pixel electrode PE provided in the first pixel P1 to display an image. Also, a touch may be sensed by the first touch electrode part TEP1.

The pixel electrode PE may be disposed on the first passivation layer 113 .

The dummy contact part R includes the connection part CP and the first dummy line DL1 electrically connected through a contact hole formed in the second passivation layer 115 .

Accordingly, the first touch electrode TEP1 is connected to the first dummy line DL1 through the dummy contact portion R.

The dummy contact part R may be disposed at a position that does not overlap the gate line. Accordingly, the gate line is not affected by the dummy contact portion R, and all gate lines may be provided under equal conditions. Accordingly, gate pulses output to the gate lines may have the same characteristics.

The structure of the dummy contact part R may be equally applied to the touch contact part TP. For example, in FIGS. 5 and 6 , when the first dummy line DL1 is the first touch line TL1 , the dummy contact part R may be the touch contact part TP. .

However, the present invention is not limited to the cross section shown in FIG. 6 . For example, in FIG. 6 , the first touch electrode TE1 including the first touch electrode part TEP1 is provided on the second passivation layer 115 , and the pixel electrode PE is disposed on the first The in-cell type display panel 100 provided on the upper end of the protective film 113 is illustrated as an example of the present invention. However, the first touch electrode TE1 including the first touch electrode part TEP1 is provided on the first passivation layer 113 , and the pixel electrode PE is disposed on the upper end of the second passivation layer 115 . may be provided in In this case, the order of the first dummy line DL1 and the connection part CP may also be changed.

Also, in FIG. 5 , the second pixel P2 disposed at the lower end of the first pixel P1 is covered by the second touch electrode TE2 . In this case, the second touch electrode parts TEP2 disposed in the region corresponding to the second pixel P2 are not electrically connected to the second touch electrode TE2 .

For example, one end of the first dummy line DL1 overlaps the first dummy line DL1 as shown in FIGS. 3 and 5 to 8 , but the first dummy line DL1 ) and is covered by the second touch electrode TE2 that is not electrically connected. An end of the first dummy line DL1 is adjacent to some of the second pixels P2 adjacent to the first data line DL1.

In particular, the first dummy line DL1 includes at least one second pixel disposed in a boundary region between the first touch electrode TE1 and the second touch electrode TE2 among the second pixels P2 . adjacent to the pixel P2.

In this case, the first dummy line DL1 is not electrically connected to the second touch electrode part TEP2 constituting the second touch electrode TE2 .

For example, the pixels illustrated in FIG. 7 are second pixels P2 covered by the second touch electrode TE2 , and the second touch electrode part TEP2 provided in the second pixel P2 is The second touch electrode TE2 is configured, and the first dummy line DL1 is not electrically connected to the second touch electrode part TEP2.

Since the second touch electrode parts TEP2 adjacent to each other constitute the second touch electrode TE2, as shown in FIG. 7 , they are electrically connected through the connection part CP.

For example, in FIG. 7 , the connection part CP performs a function of electrically connecting the adjacent second touch electrode parts TEP2 to each other.

In FIG. 8 showing a cross-section of a region in which the second touch electrode parts TEP2 are electrically connected by the connection part CP, reference numeral 111 denotes a base substrate, 112 denotes a gate insulating layer, and 113 denotes a first protective layer. , 114 is an insulating film, and 115 is a second protective film.

In this case, as compared with FIG. 6 , the connection part CP is not electrically connected to the first dummy line DL1 .

A portion in which the connection portion CP is not electrically connected to the first dummy line DL1 and overlaps is referred to as an overlap portion U. The dummy line disposed at the bottom of FIG. 7 represents a third dummy line DL3 that is covered by the second touch electrode TE2 and is electrically connected to the second touch electrode TE2 .

The overlapping portion U may be disposed at a position that does not overlap the gate line. Accordingly, the gate lines are not affected by the overlapping portion U, and all gate lines may be provided under equal conditions. Accordingly, gate pulses output to the gate lines may have the same characteristics.

The third dummy line DL3 is disposed in a shape similar to that of the first dummy line DL1 . The third dummy line DL3 is separated from the first dummy line DL1 as shown in FIG. 7 .

For example, in FIG. 7 , W denotes a region where the first dummy line DL1 and the third dummy line DL3 are separated from each other. The first data line D1 is exposed to W.

For example, the structure shown in FIGS. 7 and 8 may also be applied to the first pixels P1 disposed on top of the first touch electrode TE.

In more detail, as shown in FIG. 3 , second dummy lines DL2 extending from the direction of the third touch electrode TE3 are disposed on the upper end of the first touch electrode TE1 .

Each of the second dummy lines DL2 overlaps the first data line D1 .

Each of the second dummy lines DL2 includes a first pixel ( ) that is not adjacent to the first dummy line DL1 among the first pixels P1 covered by the first touch electrode TE2 . It is adjacent to P1).

In this case, the second dummy lines DL2 are not electrically connected to the first touch electrode parts TEP1 disposed in the first pixels P1 . Accordingly, the second dummy lines DL2 are not electrically connected to the first touch electrode TE1 .

The present invention is briefly summarized as follows.

According to the present invention, horizontal dim defects can be improved in a display panel using the self-cap method and the in-cell type, and in particular, the horizontal dim failure in the display panel using both the self-cap method, the in-cell type, and the gate-in panel method can be reduced. can be improved.

In order to overcome the horizontal dimming defect, in the present invention, a dummy line connected to only one touch electrode is overlapped with two touch electrodes.

For example, a dummy line connected to the nth touch electrode overlaps at least two gate lines overlapping the n+1th touch electrode. In this case, at least two of the gate lines are disposed in a region adjacent to the n-th touch electrode.

According to the structure as described above, the same common voltage ripple may be generated when a gate pulse is output (on timing) to the gate lines overlapping the n-th touch electrode and to the at least two gate lines. Accordingly, a deviation of the common voltage is not generated in the gate lines.

Those skilled in the art to which the present invention pertains will understand that the present invention may be embodied in other specific forms without changing the technical spirit or essential characteristics thereof. Therefore, it should be understood that the embodiments described above are illustrative in all respects and not restrictive. The scope of the present invention is indicated by the following claims rather than the above detailed description, and all changes or modifications derived from the meaning and scope of the claims and their equivalent concepts should be interpreted as being included in the scope of the present invention. do.

100: in-cell type display panel 200: gate driver
300: drive driver 400: control driver

Claims (9)

data lines to which data voltages are supplied;
gate lines to which gate pulses are supplied;
independently disposed touch electrodes;
touch lines overlapping the data lines; and
and dummy lines overlapping the data lines and arranged in parallel with the touch lines;
each of the touch electrodes overlaps at least two of the gate lines, at least two of the data lines, at least two of the touch lines, and at least two of the dummy lines;
a first touch line as any one of the touch lines overlaps all of the touch electrodes disposed along the data lines among the touch electrodes;
The first touch line is electrically connected to a first touch electrode that is any one of the touch electrodes disposed along the data lines,
Among the dummy lines, first dummy lines overlapping the first and second touch electrodes disposed adjacent to each other along the data lines may include the first one of the first and second touch electrodes. An in-cell type display panel that is electrically connected to a touch electrode. The method of claim 1,
An in-cell type display panel having a built-in gate driver for sequentially supplying the gate pulses to the gate lines. The method of claim 1,
Among the pixels corresponding to the first touch electrode, in each of the pixels adjacent to the first touch line, the first touch line is connected to the first touch electrode through a touch contact unit provided in each of the pixels. In-cell type display panel. 4. The method of claim 3,
The touch contact portion is an in-cell type display panel that does not overlap the gate line. The method of claim 1,
some of the first pixels adjacent to the first data line overlapping the first dummy line are adjacent to the first dummy line;
The second touch electrode overlaps the first dummy line, but is not electrically connected;
some of the second pixels adjacent to the first data line are adjacent to the first dummy line;
The first pixels correspond to the first touch electrode,
The second pixels correspond to the second touch electrode in an in-cell type display panel. 6. The method of claim 5,
the first dummy line is electrically connected to the first touch electrode through dummy contact portions provided in first pixels adjacent to the first dummy line among the first pixels;
The first dummy line is adjacent to at least one second pixel disposed in a boundary region between the first touch electrode and the second touch electrode among the second pixels. 6. The method of claim 5,
second dummy lines are disposed on the first touch electrode;
Each of the second dummy lines overlaps the first data line,
Each of the second dummy lines is adjacent to first pixels that are not adjacent to the first dummy line among the first pixels. in-cell type display panel;
a gate driver sequentially outputting gate pulses;
a touch driver supplying a touch driving signal to the touch electrodes provided in the in-cell display panel during a touch sensing period and supplying a common voltage to the touch electrodes during an image display period; and
a data driver outputting a data voltage;
The in-cell type display panel,
data lines to which data voltages are supplied;
gate lines to which gate pulses are supplied;
independently disposed touch electrodes;
touch lines overlapping the data lines; and
and dummy lines overlapping the data lines and arranged in parallel with the touch lines;
each of the touch electrodes overlaps with at least two of the gate lines, at least two of the data lines, at least two of the touch lines, and at least two of the dummy lines;
a first touch line as any one of the touch lines overlaps all of the touch electrodes disposed along the data lines among the touch electrodes;
The first touch line is electrically connected to a first touch electrode that is any one of the touch electrodes disposed along the data lines,
Among the dummy lines, first dummy lines overlapping the first and second touch electrodes disposed adjacent to each other along the data lines may include the first one of the first and second touch electrodes. An in-cell type display device electrically connected to a touch electrode. The method of claim 1,
The first dummy lines overlap an upper end of the second touch electrode provided at a lower end of the first touch electrode.

Images