KR20170064386A - Display panel with a built-in touch - Google Patents

Abstract

A touch-mounted display panel capable of improving the curing defects of the sealing material is provided. The touch-type display panel includes a first substrate and a second substrate bonded together by a sealing material, and a plurality of link wirings provided on the first substrate are configured to have a vertical line shape in a region overlapping with the sealing material, Is increased.

Description

[0001] The present invention relates to a display panel with a built-

BACKGROUND OF THE INVENTION 1. Field of the Invention [0002] The present invention relates to a touch-sensitive display panel, and more particularly, to a touch-sensitive display panel having an in-cell structure capable of preventing a hardening failure of a sealing material by changing the design of wiring,

The touch display device is provided with a touch panel on an image display device such as a liquid crystal display device, a field emission display device, a plasma display panel, an organic light emitting display device or the like so that the user presses the touch panel while viewing the image display device to input predetermined information It is a device that can.

2. Description of the Related Art In recent years, there has been an increasing demand for an in-cell type touch display device in which devices constituting a touch panel are built in a display device for slimming down a portable terminal such as a smart phone, a tablet PC, and the like.

FIG. 1 is a schematic view of a display panel of a conventional in-cell type touch display device, and FIG. 2 is a cross-sectional view of the area A of FIG.

1, the conventional touch display device 1 includes a display panel 10 and a driving circuit 20. [

The display panel 10 is a touch-mounted display panel having a touch panel (not shown) incorporated therein. The display panel 10 includes a display area A / A where an image is displayed and a touch operation is performed, and a non-display area N / A surrounding the display area A / A.

A plurality of pixels (not shown) and a plurality of touch blocks (not shown) are formed in the display area A / A and a driving circuit (not shown) for operating the display area A / 20 and a plurality of signal lines 30 are formed. The driving circuit 20 and the plurality of signal lines 30 are formed in the non-display area N / A of the non-display area N / A under the display area A / A.

The driving circuit 20 is connected to the display area A / A through a plurality of signal lines 30 and supplies a driving signal to the display area A / A through a plurality of signal lines 30, Signal and a touch signal.

2, the above-described display panel 10 is composed of an array substrate 11, a color filter substrate 13, and a liquid crystal panel including a liquid crystal layer (not shown) interposed between the two substrates.

In the display area A / A of the array substrate 11, a plurality of pixels and a plurality of touch blocks are formed. A plurality of signal wirings 30 and a driving circuit 20 connected thereto are disposed in a lower non-display area N / A of the non-display area N / A of the array substrate 11. [ The driving circuit 20 is in contact with the pad 35 formed at the end of the plurality of signal wirings 30.

A color filter (not shown) corresponding to the pixels of the array substrate 11 is formed in the display area A / A of the color filter substrate 13, and a black matrix 15 for partitioning the color filters is formed. A black matrix 15 is formed in the lower non-display area N / A of the color filter substrate 13. [

The array substrate 11 and the color filter substrate 13 are sealed and adhered to each other by a sealing material 17 such as a seal and the liquid crystal is injected therebetween. The sealing material 17 is formed at a position corresponding to the lower non-display area N / A of the array substrate 11 and the color filter substrate 13. [ The sealing material 17 is cured by the ultraviolet rays irradiated from the rear surface of the array substrate 11. [

On the other hand, the area where the drive circuit 20 is arranged in the array substrate 11 of the display panel 10 has a width smaller than that of the display area A / A. In addition, the plurality of pixels of the display area A / A and the pad 35 to which the drive circuit 20 is contacted have a fixed pitch.

Accordingly, in the conventional display panel 10, a plurality of signal wirings 30 of the array substrate 11 are formed in a slanting shape extending in one direction in the lower non-display area N / A. At this time, the plurality of signal wirings 30 have a narrow wiring pitch P, whereby the number of signal wirings 30 overlapping with the sealing material 17 is increased.

In this way, in the conventional display panel 10, as the number of the signal wirings 30 overlapping the sealing material 17 increases, the loss of ultraviolet light irradiated to cure the sealing material 17 increases.

That is, in the conventional display panel 10, the ratio of the area where the sealing material 17 and the signal wiring 30 are not overlapped, for example, the open area in the region where the sealing material 17 is formed becomes small, The ultraviolet light irradiated from the back surface of the array substrate 11 is blocked by the plurality of signal wirings 30 overlapping the sealing material 17. [

Therefore, in the conventional display panel 10, the sealing material 17 is hardened, and the hardening defects of the sealing material 17 cause unevenness and deteriorate the image quality. In addition, the curing defects of the sealing material 17 deteriorate the operation reliability of the touch display device.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a touch-mounted display panel capable of preventing a curing failure of a sealing material through a design change of a wiring.

According to an aspect of the present invention, there is provided a touch-sensitive display panel including a first substrate and a second substrate bonded together by a sealing material.

The first substrate includes a display region, a circuit region, and a wiring region, and the wiring region is provided with a plurality of data link wiring lines and a plurality of touch link wiring lines connecting the circuit region and the display region.

At least one of the plurality of data link wiring lines and the plurality of touch link wiring lines is formed in a vertical shape in a part of the wiring region and overlapped with the sealing material.

In the touch-mounted display panel of the present invention, since the link wiring is formed in the vertical line shape in the region where the link wiring overlaps with the sealing material, the open area where the sealing material and the link wiring do not overlap can be increased. Therefore, the loss of ultraviolet light irradiated from the back surface of the display panel with a built-in touch can be minimized and applied to the sealing material, whereby the sealing material can be stably cured.

Therefore, in the touch-mounted display panel of the present invention, it is possible to prevent the deterioration of the image quality due to defects such as stains in the panel due to the hardening of the sealing material, and to improve the operational reliability of the touch-sensitive display panel.

1 is a view schematically showing a display panel of a conventional touch panel of an in-cell type.
2 is a cross-sectional view of the region A in Fig.
3 is a view schematically showing a touch display device including a touch display panel according to the present invention.
4A is a partially enlarged view of the area B of FIG. 3 according to an embodiment of the present invention.
4B is a cross-sectional view of region B of FIG. 3 according to an embodiment of the present invention.
FIG. 5A is a partially enlarged view of a region B in FIG. 3 according to another embodiment of the present invention. FIG.
5B is a cross-sectional view of the region B of FIG. 3 according to another embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a touch display panel of a touch display device of an in-cell structure according to the present invention will be described in detail with reference to the accompanying drawings.

3 is a view schematically showing a touch display device including a touch display panel according to the present invention.

3, the touch display device 100 of the present embodiment may include a touch display panel 101 and a driving circuit 200. [

The touch display panel 101 may be a touch-incorporated liquid crystal panel having a touch panel (not shown). The touch display panel 101 may include a display area A / A and a non-display area N / A.

A plurality of pixels P, a plurality of touch blocks TB, and a plurality of color filters (not shown) may be formed in the display area A / A of the touch display panel 101. [

A plurality of pixels P may display an image in the display area A / A and may be connected to a gate line (not shown) and a data line (not shown). The plurality of touch blocks TB perform a touch operation in the display area A / A and can be connected to a touch line (not shown). The plurality of touch blocks TB are operated as common electrodes in the image display period of the touch display panel 101 and can be operated as touch electrodes in the touch section of the touch display panel 101. The plurality of touch blocks TB may have a size corresponding to a predetermined number of pixels P. [ A plurality of color filters are positioned in correspondence with the plurality of pixels P and can display a color image.

A non-display area N / A of the touch display panel 101 surrounds the display area A / A. The driving circuit 200 is disposed in the lower non-display area N / A formed in the lower portion of the display area A / A in the non-display area N / A. A plurality of link wirings 117 connecting the driving circuit 200 and the display area A / A may be formed.

The driving circuit 200 is mounted on a pad (not shown) of the lower non-display area N / A and may include a data driver (not shown) and a touch driver (not shown). The data driver generates a data signal provided to each of the plurality of pixels P of the display area A / A. The touch driver generates a touch signal provided to each of the plurality of touch blocks TB of the display area A / A.

The plurality of link wirings 117 may be arranged between the drive circuit 200 and the display area A / A in the lower non-display area N / A. The plurality of link wirings 117 may include a plurality of data link wirings (not shown) and a plurality of touch link wirings (not shown). The plurality of data link lines can transmit the data signal generated by the data driver of the driving circuit 200 to a plurality of data lines of the display area A / A. The plurality of touch link wires can transmit touch signals generated in the touch driver of the driving circuit 200 to a plurality of touch lines of the display area A / A.

FIG. 4A is a partially enlarged view of region B of FIG. 3 according to an embodiment of the present invention, and FIG. 4B is a cross-sectional view of region B of FIG. 3 according to an embodiment of the present invention.

3 to 4B, the touch display panel 101 of the present embodiment may include an array substrate 110 and a color filter substrate 120 bonded together by a sealing material 130. Liquid crystal is injected between the array substrate 110 and the color filter substrate 120 to form a liquid crystal layer (not shown). The array substrate 110 is formed to have a width larger than that of the color filter substrate 120 and the driving circuit 200 may be disposed on the exposed array substrate 110.

A plurality of pixels P and a plurality of touch blocks TB described above may be formed in the display area A / A of the array substrate 110. A plurality of color filters may be formed in the display area A / A of the color filter substrate 120.

A drive circuit 200 is disposed in the lower non-display area N / A of the array substrate 110 and a plurality of link wirings 117 are formed between the drive circuit 200 and the display area A / . A black matrix 123 may be formed in the lower non-display area N / A of the color filter substrate 120. [

The lower non-display area N / A of the array substrate 110 may include a circuit area and a wiring area. The circuit region may be the first region R1 and the wiring region may be the second region R2, the third region R3 and the fourth region R4.

A pad portion 115 having a plurality of pads TP and DP to be mounted on the driving circuit 200 may be formed in the circuit region, that is, the first region R1. The plurality of pads TP, DP may include one or more touch pads TP and one or more data pads DP.

The touch pad TP may be connected to the touch driving part of the driving circuit 200 and may be disposed on both sides of the data pad DP in the pad part 115. [ The data pad DP may be connected to the data driver of the driving circuit 200 and may be disposed between the touch pad TP at the pad portion 115. [

A plurality of link wirings 117 connecting between the pad portion 115 and the display region A / A may be formed in the wiring regions, that is, the second region R2 to the fourth region R4. The plurality of link wirings 117 may include one or more touch link wirings (TLL) and one or more data link wirings (DLL).

The touch link wiring TLL can connect between the touch pad TP of the pad unit 115 and the touch line of the display area A / A. The touch link wiring TLL can transmit the touch signal output from the touch driving unit of the driving circuit 200 to the touch pad TP to the touch line of the display area A / A.

The data link wiring (DLL) can connect the data pad DP of the pad unit 115 and the data line of the display area A / A. The data link wiring (DLL) can transfer the data signal output from the data driver of the driving circuit 200 to the data pad DP to the data line of the display area A / A.

The touch link wiring TLL and the data link wiring (DLL) may be arranged on different layers in the array substrate 110. [ For example, the data link wiring (DLL) may be disposed on the gate insulating film 112 formed on the insulating substrate 111. [ The touch link wiring TLL may be disposed on the first protective layer 113 formed on the data link wiring (DLL). A second passivation layer 114 is formed on the touch link wiring TLL and a touch pad TP connected to the touch link wiring TLL through a contact hole (not shown) of the second passivation layer 114 .

The data link wiring (DLL) may have an oblique shape formed to extend in one direction in the second region (R2) to the fourth region (R4). For example, if the total number of data link wirings (DLLs) is 108, the first to 54th data link wirings (DLLs) have a slanting shape extending in one direction in the second to fourth regions R2 to R4 And the 55th to 108th data link wirings (DLLs) may have an oblique shape extending in the second direction from the second area (R2) to the fourth area (R4). The data link wiring (DLL) may have the same wiring pitch, for example, the first pitch P1 in the second region (R2) to the fourth region (R4).

The touch link wiring TLL may have at least one vertical line shape in the second region R2 to the fourth region R4. For example, the touch link wiring TLL formed in the second region R2 and the fourth region R4 may have a slant shape extending in one direction between the first region R1 and the display region A / A have. On the other hand, the touch link wiring TLL formed in the third region R3 is arranged in a direction perpendicular to the second region R2 and the fourth region R4, that is, the data line of the display region A / And may have a straight line shape extending vertically in the same direction as the line. Here, the touch link wiring TLL of the third region R3 has a wiring pitch relatively larger than the first pitch P1 of the data link wiring DLL of the same area, that is, the third region R3, And may have a pitch P2.

As described above, among the plurality of link wirings 117, the touch link wiring TLL is formed in at least one area of the lower non-display area N / A of the array substrate 110, for example, in the third area R3, But may be formed to have a vertical line shape. Therefore, the wiring pitch of the touch link wiring TLL in the third region R3, that is, the second pitch P2, is equal to the wiring pitch of the touch link wiring TLL in the remaining region and the wiring pitch of the data link wiring DLL The first pitch P1 of the first and second planes of the first and second planes of the first and second planes.

4B, the sealing material 130 is configured to correspond to the third region R3 of the lower non-display region N / A of the array substrate 110, Can be overlapped with the touch link wiring (TLL) and the data link wiring (DLL). The sealing material 130 may be cured by ultraviolet rays irradiated from the rear surface of the array substrate 110. [

At this time, since the touch link wiring TLL is formed in the third region R3 in a vertical line shape and the wiring pitch is increased, the loss of the ultraviolet light to be irradiated can be minimized and applied to the sealing material 130. [ In other words, the seal material 130 and the touch link wiring TLL do not overlap with each other in the entire region S / A where the sealing material 130 is formed in the third region R3 by the touch link wiring TLL in the form of a vertical line The ratio of the area, that is, the open area O / A is increased. Accordingly, the ultraviolet rays irradiated from the rear surface of the array substrate 110 can be applied to the sealing material 130 with minimal loss through the open area O / A. Accordingly, the sealing material 130 can be normally cured.

That is, the touch display panel 101 of the present embodiment can stably perform the curing of the sealing material 130 by ultraviolet rays, as compared with the conventional touch display panel. Therefore, in the touch display panel 101 of the present embodiment, it is possible to prevent defects such as unevenness caused by the hardening of the sealing material 130, and to improve the reliability of operation of the touch display device 100 have.

FIG. 5A is a partially enlarged view of a region B of FIG. 3 according to another embodiment of the present invention, and FIG. 5B is a cross-sectional view of a region B of FIG. 3 according to another embodiment of the present invention.

The touch display panel 101 of the present embodiment is configured such that both of the data link wiring DLL and the touch wiring wiring TLL in a part of the lower non-display area N / A of the array substrate 110 ' And has the same configuration as that of the touch display panel 101 described above with reference to Figs. 5A and 5B, the same members are denoted by the same reference numerals, and a detailed description thereof will be omitted.

3, the touch display panel 101 of the present embodiment includes a touch-mounted liquid crystal panel with a built-in touch panel (not shown) and includes an array substrate 110 'and a color filter substrate 120 . The array substrate 110 'and the color filter substrate 120 are bonded together by a sealant 130, and liquid crystal is injected therebetween.

A plurality of pixels P and a plurality of touch blocks TB described above may be formed in the display area A / A of the array substrate 110 '. A plurality of color filters may be formed in the display area A / A of the color filter substrate 120.

A driver circuit 200 is disposed in the lower non-display area N / A of the array substrate 110 'and a plurality of link wirings 117 are provided between the driver circuit 200 and the display area A / . A black matrix 123 may be formed in the lower non-display area N / A of the color filter substrate 120. [

A lower non-display area N / A of the array substrate 110 'includes a first area R1 as a circuit area, a second area R2 as a wiring area, a third area R3 and a fourth area R4, . ≪ / RTI >

The first region R1 is formed with a plurality of pads TP and DP including at least one touch pad TP and at least one data pad DP. The driving circuits 200 are mounted on the plurality of pads TP and DP. One or more touch pads TP may be disposed on both sides of the data pad DP.

A plurality of link wirings 117 connecting the pad portion 115 and the display region A / A may be formed in the second to fourth regions R2 to R4. The plurality of link wirings 117 may include one or more touch link wirings (TLL) and one or more data link wirings (DLL). The data link wiring (DLL) connects between the data pad DP and the data line, and transfers the data signal output from the driving circuit 200 to the data line. The touch link wiring TLL connects the touch pad TP and the touch line, and transmits the touch signal output from the driving circuit 200 to the touch line.

The data link wiring (DLL) may be disposed on the gate insulating film 112 formed on the insulating substrate 111. The touch link wiring TLL may be disposed on the first protective layer 113 formed on the data link wiring (DLL). The touch pad TP may be disposed on the second protective layer 114 formed on the touch link wiring TLL and connected to the touch link wiring TLL through a contact hole (not shown).

The data link wiring (DLL) and the touch wiring wiring (TLL) may have a straight line shape extending in a vertical direction in at least one of the second region (R2) to the fourth region (R4).

For example, the data link wirings (DLLs) formed in the second region R2 and the fourth region R4 may have a slanting shape extending in one direction between the first region R1 and the display region A / A have. On the other hand, the data link wiring (DLL) formed in the third region R3 may have a vertical line shape extending in the vertical direction between the second region R2 and the fourth region R4. At this time, the data link wiring (DLL) of the third region R3 can have a wiring pitch, that is, a first pitch P1, which is relatively larger than the wiring pitch of the data link wiring (DLL) in the remaining region.

 The touch link wiring TLL formed in the second region R2 and the fourth region R4 may have a slant shape extending in one direction between the first region R1 and the display region A / have. On the other hand, the touch link wiring TLL formed in the third region R3 may have a vertical line shape extending in the vertical direction between the second region R2 and the fourth region R4. At this time, the touch link wiring TLL of the third region R3 may have a wiring pitch, that is, a second pitch P2, which is relatively larger than the wiring pitch of the touch link wiring TLL in the remaining area. The second pitch P2 of the touch link wiring TLL in the third region R3 may be larger than the first pitch P1 of the data link wiring DLL in the same region.

5B, the sealing material 130 is configured to correspond to the third region R3 of the lower non-display region N / A of the array substrate 110, Can be overlapped with the touch link wiring (TLL) and the data link wiring (DLL). The sealing material 130 may be cured by ultraviolet rays irradiated from the rear surface of the array substrate 110. [

At this time, since the data link wiring (DLL) and the touch link wiring (TLL) are formed in the third region R3 in a vertical line shape and the wiring pitch is increased, the loss of the ultraviolet light to be irradiated is minimized, have. In other words, since the touch link wiring TLL is formed in a vertical line shape in the third region R3, the sealing material 130 and the touch link wiring TLL overlap with the entire region S / A in which the sealing material 130 is formed The ratio of the open area (O / A) that does not exist can be increased. In addition, since the data link wiring line (DLL) in the third region R3 is formed in a vertical line shape, the sealing material 130 and the data link wiring line (DLL) do not overlap with each other in the entire region S / A where the sealing material 130 is formed The ratio of the open area (O / A) can be increased. Accordingly, the ultraviolet rays irradiated from the rear surface of the array substrate 110 can be applied to the sealing material 130 with minimal loss through the open area O / A. Accordingly, the sealing material 130 can be normally cured.

That is, the touch display panel 101 of the present embodiment can stably perform the curing of the sealing material 130 by ultraviolet rays, as compared with the conventional touch display panel. Therefore, in the touch display panel 101 of the present embodiment, it is possible to prevent defects such as unevenness caused by the hardening of the sealing material 130, and to improve the reliability of operation of the touch display device 100 have.

While a number of embodiments have been described in detail above, it should be construed as being illustrative of preferred embodiments rather than limiting the scope of the invention. Therefore, the invention should not be construed as limited to the embodiments described, but should be determined by equivalents to the appended claims and the claims.

100: touch display device 101: touch display panel
110: array substrate 120: color filter substrate
130: sealing material 200: driving circuit
DLL: Data link wiring TLL: Touch link wiring

Claims (10)

A plurality of data link wiring lines and a plurality of touch link wiring lines connecting the circuit region and the display region and including a display region, a circuit region, and a wiring region, At least one of the plurality of touch link wires being formed in a vertical shape in a part of the wiring region;
A second substrate having a plurality of color filters corresponding to the display area; And
And a sealing material disposed at a position corresponding to a portion of the wiring region and for bonding the first substrate and the second substrate together. The method according to claim 1,
Wherein the wiring region includes a first region, a second region and a third region between the circuit region and the display region,
Wherein the plurality of data link wirings extend in an oblique direction in one direction in the first region to the third region,
Wherein the plurality of touch link wires extend in a slanting shape in one direction in the first region and the third region and extend in a straight line shape in the vertical direction in the second region. 3. The method of claim 2,
Wherein the sealing material overlaps the plurality of touch link wires at a position corresponding to the second area of the wiring area. 3. The method of claim 2,
Wherein the plurality of touch link wirings of the second region have a larger wiring pitch than the plurality of touch link wirings of the first region and the third region. 3. The method of claim 2,
Wherein the plurality of touch link wirings of the second region have a larger wiring pitch than the plurality of data link wirings of the second region. The method according to claim 1,
Wherein the wiring region includes a first region, a second region and a third region between the circuit region and the display region,
Each of the plurality of data link wires and the plurality of touch link wires extending in a slanting line in one direction in the first region and the third region and extending in a straight line shape in a vertical direction in the second region, panel. The method according to claim 6,
Wherein the sealing material overlaps the plurality of touch link wires at a position corresponding to the second area of the wiring area. The method according to claim 6,
The plurality of touch link wirings and the plurality of data link wirings of the second region are connected to the plurality of touch link wirings and the plurality of data link wirings of the first region and the third region, Integrated display panel. The method according to claim 6,
Wherein the plurality of touch link wirings of the second region have a larger wiring pitch than the plurality of data link wirings of the second region. The method according to claim 1,
Wherein the plurality of data link wires and the plurality of touch link wires are disposed on different layers in the first substrate.

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