TW201807549A - Touch display panel - Google Patents

Abstract

A touch display panel includes a substrate, a driving circuit and a touch display array. The substrate includes a first region and a second region, and the first region is disposed between the second region and the driving circuit. The touch display array includes scan lines, data lines, first common electrodes, conductive patterns and conductive lines. The scan lines cross the data lines, and sub-pixels are defined by the scan lines and the data lines. The first common electrodes are disposed in the sub-pixels in the first region and the second region. The first common electrodes are connected with one another for forming a plurality of touch sensing pads. The conductive patterns are disposed in the sub-pixels in the first region. Each conductive line is electrically connected to at least one touch sensing pad. At least one first common electrode and at least one conductive pattern overlap at least one conductive line in a vertical projection direction in the first region, and the conductive lines in the second region are partially covered by the first common electrodes in the vertical projection direction.

Description

Touch display panel

The present invention relates to a touch display panel, and more particularly to a touch display panel capable of reducing noise.

Touch sensing technology has developed rapidly in recent years, and many consumer electronic products with touch functions have been launched one after another. In such products, the area of the original display panel is mainly given the function of touch sensing. It can also be said that the original simple display panel is transformed into a touch display panel with touch recognition function. According to the structural design of the touch display panel, it can be generally divided into out-cell and in-cell or on-cell touch display panels. The in-cell touch display panel does not An additional touch panel needs to be made to make the product thinner and lighter, which also saves the cost of making a touch panel and has a price advantage. Since the touch elements of an in-cell touch display panel are directly manufactured on the inner surface of the display panel, the distance between the sensing pad of the touch panel and each element in the display panel is relatively short, so it is easier. This creates a problem of capacitive coupling. In addition, the operating principle of the capacitive touch panel is to use a sensing pad to detect a change in capacitance of a touch point, and determine the position of the touch point according to the change in capacitance. Therefore, unnecessary capacitive coupling may affect the sensing pad and cause noise, or it is easy to generate false alarm points.

One of the main objectives of the present invention is to provide a touch display panel to reduce the influence caused by unnecessary capacitive coupling, thereby improving the accuracy of touch.

To achieve the above object, the present invention provides a touch display panel including a substrate, a driving circuit, and a touch display array. The substrate has a visible area, and the visible area includes a first area and a second area. The driving circuit is disposed on the substrate and located on one side outside the visible area, and the first area is located between the second area and the driving circuit. The touch display array is disposed on the substrate and is located in a visible area. The touch display array includes a plurality of scan lines, a plurality of data lines, a plurality of first common electrodes, a plurality of conductive patterns, and a plurality of wires. The scanning lines and the data lines are staggered with each other to define a plurality of sub-pixels. The first common electrodes are respectively disposed in the sub pixels in the first region and the second region. The first common electrodes are connected to each other to form a plurality of touch sensing pads, and the touch sensing pads are arranged in an array manner. . The conductive patterns are respectively disposed in the sub-pixels of the first region. The wires are respectively disposed between the substrate and the first common electrode, wherein each wire is electrically connected to at least one touch sensing pad, and at least one wire located in the first area is connected with at least one first in a vertical projection direction. The electrodes and at least one conductive pattern overlap, and each of the wires located in the second region is partially covered by the first common electrode in a vertical projection direction.

To achieve the above object, the present invention further provides a touch display panel including a substrate, a driving circuit and a touch display array. The substrate has a visible area, and the visible area includes a first area, a second area, and a third area. The driving circuit is disposed on the substrate and located on one side outside the visible area, and the first area and the third area are located between the second area and the driving circuit. The touch display array is disposed on the substrate and is located in a visible area. The touch display array includes a plurality of scan lines, a plurality of data lines, a plurality of first common electrodes, a plurality of second common electrodes, and a plurality of wires. The scanning lines and the data lines are staggered with each other to define a plurality of sub-pixels. The first common electrodes are respectively disposed in the sub pixels in the first region and the second region. The first common electrodes are connected to each other to form a plurality of touch sensing pads, and the touch sensing pads are arranged in an array manner. . The second common electrodes are respectively disposed in the second pixels in the third region. The wires are respectively disposed between the substrate and the first common electrode and the second common electrode, wherein each wire is electrically connected to at least one touch sensing pad. The first region includes a plurality of first sub-regions, and the third region includes a plurality of third sub-regions. The first sub-region and the third sub-region are alternately arranged between the second region and the driving circuit along an extension direction of the second region. .

In order to make a person skilled in the art who is familiar with the technical field of the present invention further understand the present invention, the preferred embodiments of the present invention are enumerated below, and in conjunction with the accompanying drawings, the constitutional content of the present invention and the effects to be achieved are described in detail. .

Please refer to FIG. 1, which is a schematic cross-sectional view of a touch display panel according to a first embodiment of the present invention. As shown in FIG. 1, the touch display panel 1A of this embodiment includes a first substrate 10, a second substrate 20, and a display medium layer 30. The second substrate 20 is disposed opposite to the first substrate 10, and the display medium layer 30 is disposed between the first substrate 10 and the second substrate 20. The first substrate 10 and the second substrate 20 may include a glass substrate, a plastic substrate, or other suitable hard or flexible base plates. The first substrate 10 in this embodiment is a glass substrate as an example, but is not limited thereto. The first substrate 10 may be, for example, an array substrate, which may optionally include an active element (such as a thin film transistor), a passive element (such as a capacitor, a resistor, or the like) or other suitable elements disposed on the display medium layer 30 and the first substrate 10 In between, the second substrate 20 may be, for example, an opposite substrate, which may optionally include a color filter, a black matrix, or other suitable elements disposed between the display medium layer 30 and the second substrate 20, but not the same. Limited. In addition, at least one of the color filter or the black matrix may be selectively disposed on the first substrate 10, which may be referred to as a color filter on array (COA) or a black matrix on the first substrate 10. On a black matrix on array (BOA). The display medium layer 30 may be, for example, a liquid crystal layer or an electrophoresis layer, but is not limited thereto. In this embodiment, the touch display panel 1A drives the display medium layer 30 in a Fringe Field Switching mode, but the present invention is not limited thereto. In other modified embodiments, the touch display panel may also drive the display medium layer 30 in other types of In-Plane Switching mode or other suitable types to drive the display medium layer 30.

Please refer to FIGS. 2A to 7. FIG. 2A illustrates a schematic diagram of a first substrate of the first embodiment of the present invention, and FIG. 2B illustrates an exploded schematic diagram of the first substrate of the first embodiment of the present invention. FIG. 3 shows a partially enlarged schematic view of the first common electrode and the lead in the area X in FIG. 2A, and FIG. 4 shows the first substrate of the first embodiment of the present invention along the tangent line A1- in FIG. 3 A1 'is a schematic cross-sectional view. FIG. 5 is a schematic cross-sectional view of the first substrate of the first embodiment of the present invention along the tangent line A2-A2' in FIG. 3, and FIG. 6 is a view illustrating the area Y in FIG. A partially enlarged schematic diagram of a first common electrode, a conductive pattern, and a conductive line, and FIG. 7 illustrates a schematic cross-sectional view of a first substrate of a first embodiment of the present invention along a tangent line BB ′ in FIG. 6. In order to highlight the characteristics of the touch display panel of this embodiment, FIG. 3 and FIG. 6 only show the first common electrode, conductive pattern, and wire on the first substrate 10, and FIGS. 4, 5 and 5 The cross-sectional view of the first substrate 10 in FIG. 7 shows the corresponding second substrate 20 and the display medium layer 30 together. In addition, in order to clearly show the connection relationship between the touch sensing pad, the lead wire, and the driving circuit in this embodiment, FIG. 2A and FIG. 2B do not depict the overlapping feature of the lead wire and the data line. As shown in FIGS. 2A to 7, the touch display panel 1A of this embodiment includes a touch display array 100 and a driving circuit 102 disposed on a first substrate 10, and the first substrate 10 has a viewing area Rd, where The touch display array 100 is located in the visible region Rd, and the driving circuit 102 is located on a side outside the visible region Rd. In addition, the visible region Rd includes a first region R1 and a second region R2, and the first region R1 is located between the second region R2 and the driving circuit 102. The touch display array 100 includes scan lines 104, data lines 106, a first common electrode 108, a conductive pattern 110 (see FIG. 6), and a conductive line 112. The scanning lines 104 and the data lines 106 extend in different directions and are staggered with each other in the visible area Rd to define a plurality of sub-pixels P. The materials of the scan lines 104 and the data lines 106 may be metal, alloy or other suitable materials or a stack of the above materials. The first common electrode 108 is respectively disposed in the sub-pixels P in the first region R1 and the second region R2, and a plurality of sub-pixels P in the visible region Rd can be divided into a plurality of groups. It is composed of a plurality of adjacent side-by-side sub-pixels P, and the first common electrode 108 in each group is connected to each other to form a touch sensing pad 114. The number of secondary pixels P included in each group can be adjusted as needed. In other words, the touch display panel 1A of this embodiment includes a plurality of groups of sub-pixels P, where the first common electrodes 108 disposed in the sub-pixels P in each group are connected to each other and formed in a plurality of rows A plurality of touch sensing pads 114 arranged in an array manner of a plurality of columns are respectively coupled to the reading or driving circuit 102 through a plurality of wires 112, as shown in FIGS. 2A and 2B.

The touch display panel 1A of this embodiment is an in-cell touch display panel. The first common electrode 108 is used for sensing touch as well as displaying. As shown in FIG. 3, the first common electrode 108 includes a trunk portion 108m and a branch portion 108b. The trunk portion 108m extends substantially along the second direction D2, the branch portion 108b extends substantially along the first direction D1, and the branch portion 108b There are slits S between, but not limited to this. One end of each wire 112 is electrically connected to a touch sensing pad 114, and the other end is electrically connected to the driving circuit 102. For example, as shown in FIG. 4, the lead wire 112 may be directly connected to the trunk portion 108 m of the first common electrode 108 in the touch sensing pad 114 through the contact hole 113, but is not limited thereto. In other words, each touch sensing pad 114 is electrically connected to the driving circuit 102 through a wire 112, so that the driving circuit 102 can obtain the change in capacitance detected by the touch sensing pad 114 through the wire 112. The touch display panel 1A of this embodiment is a self-capacitive touch display panel. The driving circuit 102 can transmit a sensing signal to the touch sensing pad 114 through the wire 112, thereby detecting the touch sensing pad 114 and a finger. Between or caused by the capacitance change, and determine the location of the touch, but not limited to this. In addition, the conductive line 112 may be disposed between the first substrate 10 and the first common electrode 108 in the vertical projection direction V, but is not limited thereto. As shown in FIG. 2A, FIG. 3, and FIG. 5, in the second region R2 of the first substrate 10, only a part of the wire 112 in the vertical projection direction V is covered by the first common electrode 108, and in some cases No lead 112 passes through the sub-pixel P. For example, the wire 112 can extend in the first direction D1, and therefore, it can be staggered and partially overlap with the trunk portion 108m of the first common electrode 108 extending in the second direction D2. In other words, at least a part of each of the conductive lines 112 in the second region R2 is not covered by the first common electrode 108. As shown in FIGS. 2A, 6 and 7, in the first region R1 of the first substrate 10, in addition to the first common electrode 108 in the sub-pixel P, a conductive pattern 110 is also provided in In each pixel P. In this embodiment, the conductive pattern 110 is a line segment extending along the first direction D1, and is connected to the trunk portion 108m of the first common electrode 108. The conductive pattern 110 and the first common electrode 108 are the same patterned conductive layer. Therefore, they can be produced simultaneously. Thereby, the at least one conductive line 112 located in the first region R1 overlaps the at least one first common electrode 108 and the at least one conductive pattern 110 in the vertical projection direction V. Since the first region R1 is relatively close to the driving element 102, there will be more wires 112 passing through the first region R1. In this embodiment, the first common electrode 108 and the conductive pattern 110 cover the wires in the first region R1. 112, which can provide a shielding effect to avoid parasitic capacitance between the lead 112 and the finger, so as to suppress signal coupling caused by coaxial multi-finger touch with the lead 112. In addition, Table 1 lists the results of the ratio of the area of the first region R1 to the area of the visible region Rd at different ratios (the area of the first region R1 / the area of the visible region Rd). The results are shown in Table 1 below.

Table 1

◎: Best effect

○: Good effect

△: small effect

As shown in Table 1, in the touch display panel 1A of this embodiment, when the range of the area of the first region R1 to the area of the visible region Rd is three-fifths or more, the effect of suppressing the coupling of multi-finger touch signals is more effective. good. In addition, by providing the conductive pattern 110 interconnected with the first common electrode 108, the resistance of the touch sensing pad 114 can also be reduced.

As shown in FIG. 5 and FIG. 7, the touch display panel 1A further includes pixel electrodes 116 respectively disposed in the sub-pixels P in the first region R1 and the second region R2. The pixel electrodes 116 are separated from each other. The pixel electrode 116 is disposed between the conductive line 112 and the first common electrode 108, but is not limited thereto. In other modified embodiments, the conductive lines 112 and the pixel electrodes 116 may be disposed on the same plane or on the same insulating layer. In addition, the pixel electrode 116 in this embodiment does not have a slit, but is not limited thereto. Except that the conductive pattern 110 and the first common electrode 108 are the same patterned conductive layer, at least a part of the conductive pattern 110 and at least a part of the first common electrode 108 are coplanar. The pixel electrode 116 and the first common electrode 108 may be transparent electrodes, such as an indium tin oxide electrode, other suitable materials, or a stack of the foregoing materials. The conducting wire 112 in this embodiment is disposed between the data line 106 and the first common electrode 108, and the data line 106 and the conducting line 112 overlap in the vertical projection direction V. The materials of the wires 112, the data lines 106, and the scan lines 104 may be metal, alloy, or other suitable materials or a stack of the above materials. In addition, the touch display panel 1A includes a first insulating layer 118, a second insulating layer 120, a third insulating layer 122, and a flat layer 124. The first insulating layer 120 is disposed between the first substrate 10 and the data line 106, and the second The insulating layer 120 is disposed between the pixel electrode 116 and the conductive line 112, the third insulating layer 122 is disposed between the pixel electrode 116 and the first common electrode 108, and the flat layer 124 is disposed between the conductive line 112 and the data line 106. The materials of the first insulating layer 118, the second insulating layer 120, the third insulating layer 122, and the flat layer 124 may include an inorganic insulating material, an organic insulating material, or a stack of the foregoing materials. The inorganic insulating material may be, for example, silicon oxide, silicon nitride, or nitrogen. Silicon oxide, other suitable materials, or the foregoing materials are stacked. The organic insulating material may be, for example, acrylic, photoresist, epoxy resin, other suitable materials, or the foregoing materials. In addition, each pixel P may include an active switching element (not shown), which may be electrically connected to the corresponding scan line 104, data line 106, and pixel electrode 116, and may be disposed on the flat layer 124 and the first substrate 10 In the meantime, the function and configuration of the active switching element are known to those having ordinary knowledge in the art, and will not be repeated here.

The touch display panel of the present invention is not limited to the above embodiments. The following will sequentially introduce touch display panels of other preferred embodiments and modified embodiments of the present invention. In order to facilitate the comparison of the differences between the embodiments and simplify the description, the same symbols are used in the following embodiments The same components are mainly described for the differences between the embodiments, and the repeated parts are not described again.

Please refer to FIG. 8, which illustrates a schematic cross-sectional view of a first region of a first substrate of a first modified embodiment of the first embodiment of the present invention. The corresponding second substrate 20 and the display medium layer 30 are shown. As shown in FIG. 8, this modified embodiment is different from the first embodiment in that the lead wire 112 is disposed on the same plane as the pixel electrode 116. In this case, the touch display panel 1B may omit the seventh embodiment. The second insulating layer 120 in the figure. Please refer to FIG. 9, which illustrates a schematic cross-sectional view of a first region of a first substrate of a second variation of the first embodiment of the present invention, and a cross-sectional view of the first substrate 10 of FIG. The corresponding second substrate 20 and the display medium layer 30 are shown. As shown in FIG. 9, this modified embodiment is different from the first embodiment in that the first common electrode 108 of the touch display panel 1C is disposed between the pixel electrode 116 a and the first substrate 10, and the pixels are The electrode 116a has a slit, and the branch portion 108c of the first common electrode 108 does not have a slit. In addition, the conductive pattern 110 and the first common electrode 108 may be the same patterned conductive layer. At least a part of the conductive pattern 110 and at least a part of the first common electrode 108 are coplanar and are located in the first region R1. The conductive pattern 110 and the first common electrode 108 are connected to each other. The remaining features of the touch display panels 1B and 1C of the above first variation embodiment and the second variation embodiment may be the same as those of the first embodiment, and reference may be made to FIG. 1 to FIG. 7, and details are not described herein again. In addition, the features of the above first and second modified embodiments can also be applied to the following embodiments.

Please refer to FIG. 10A, FIG. 10B, and FIG. 11. FIG. 10A illustrates a schematic diagram of a first substrate of a second embodiment of the present invention, and FIG. 10B illustrates a first substrate of a second embodiment of the present invention. An exploded schematic view of the substrate, and FIG. 11 is a schematic cross-sectional view of the first substrate according to the second embodiment of the present invention, taken along the tangent line CC ′ of FIG. 10A. In order to clearly show the connection relationship between the touch sensing pad, the lead, and the driving circuit in this embodiment, the overlapping features of the lead and the data line are not shown in FIGS. 10A and 10B. In addition, the cross-sectional view of the first substrate 10 in FIG. 11 also shows the second substrate 20 and the display medium layer 30 corresponding thereto. As shown in FIG. 10A, FIG. 10B, and FIG. 11, this embodiment is different from the first embodiment in that the visible region Rd further includes a third region R3, and the third region R3 is located in the second region R2 and the driving circuit. Between 102. In this embodiment, the first region R1 includes a plurality of first sub-regions SR1, the third region R3 includes a plurality of third sub-regions SR3, and the first sub-region SR1 and the third sub-region SR3 extend along the extending direction of the second region R2 (Ie, the second direction D2) are alternately arranged. In addition, the area of each group of the first sub-region SR1 and the third sub-region SR3 corresponds to the area of a row or a row of the touch-sensing pads 114 in the array of the touch-sensing pads 114. In this embodiment, the touch display array 100 further includes second common electrodes 126 respectively disposed in the sub-pixels P in the third region R3, and the second common electrode 126 and the first common electrode 108 are not between each other. connection. In other words, the second common electrode 126 is not a part of the touch sensing pad 114 and is not used to sense touch. For example, when the touch display panel 2 displays a picture, the second common electrode 126 and the first common electrode 108 can be applied with the same common voltage. However, when the touch display panel 2 is inductively touched, only the first common electrode is applied. 108 receives the sensing signal, and the second common electrode 126 does not receive the sensing signal. Therefore, the second common electrode 126 can be regarded as a dummy electrode during a touch operation. In addition, the second common electrode 126 in this embodiment may have a slit like the first common electrode 108, but it is not limited thereto. In detail, the second common electrode 126 is disposed in the third sub-region SR3, and the second common electrodes 126 may be connected to each other or not. The second common electrode 126 located in the third sub-region SR3 and the first common electrode 108 located in the first sub-region SR1 and the second region R2 are not connected to each other. In this embodiment, the first common electrode 108 and the second common electrode 126 are the same patterned conductive layer, and at least a part of the first common electrode 108 and at least a part of the second common electrode 126 are coplanar. In addition, in this embodiment, the first region R1 and the third region R3 may be selectively provided with the conductive pattern 110 or not provided with the conductive pattern 110. When the conductive pattern 110 is provided, they may be shared with the first common electrode 108 or the second common electrode 108, respectively. The electrodes 126 are connected to each other, but not limited thereto. The remaining features of the touch display panel 2 of this embodiment may be the same as those of the first embodiment, and reference may be made to FIG. 1 to FIG. 7, and details are not described herein again.

Please refer to Table 2, which lists the results of the third sub-region SR3 and the first sub-region SR1 at different width ratios (the width of the third sub-region SR3: the width of the first sub-region SR1).

Table 2

◎: best (or maximum)

○: Good (or large)

□: Medium

△: poor (or small)

As shown in Table 2, since the second common electrode 126 in the third region R3 is not used to sense touch, when the area of the third sub-region SR3 is larger, the touch sensing pad in the first sub-region SR1 The area of 114a is also relatively smaller, thereby making the touch sensing signal smaller and less effective. On the other hand, the second common electrode 126 in the third region R3 is not used for inductive touch and is not connected to the first common electrode 108. Therefore, although the wire 112 passing through the third region R3 and the second common electrode 126 are generated Capacitive coupling also does not cause additional noise or false alarm points. In other words, when the area of the third sub-region SR3 is larger, the effect of reducing the coupling of the overall noise and the sensing signal is more significant. In this embodiment, the lengths of the third sub-region SR3 and the first sub-region SR1 are approximately equal in the first direction D1, and the width ratio range of the third sub-region SR3 and the first sub-region SR1 in the second direction D2 It is 1: 3 to 1: 6, and preferably 1: 4. The width of the third sub-region SR3 in the second direction D2 is, for example, 1 mm to 2.5 mm, and the width of the first sub-region SR1 in the second direction D2 is, for example, 3 mm to 6 mm.

In addition, please refer to Table 3, which lists the area of the third sub-region SR3 and the first sub-region SR1 and the area of the visible region Rd at different ratios (the area of the third sub-region SR3 and the first sub-region SR1 and / visible Of the area Rd).

table 3

◎: Best effect

○: Good effect (or small difference)

△: small effect (or large difference)

Since the touch sensing pad 114 located in the second region R2 is far away from the driving circuit 102, the degree of attenuation of the sensing signal transmitted to the driving circuit 102 is relatively serious. By providing the second common electrode 126 in the third region R3 near the driving circuit 102, the area of the touch sensing pad 114a in the first sub-region SR1 can be smaller than that of the touch sensing pad 114 in the second region R2. The area further reduces the difference between the signal strength of the touch sensing pad 114 in the second region R2 and the signal strength of the touch sensing pad 114a in the first sub-region SR1, which can reduce the difficulty of determining the touch position. As shown in Table 3, when the area of the third sub-region SR3 in the visible region Rd is too small or too large, the effect of reducing the difference in signal strength between the second region R2 and the first sub-region SR1 is not good. Furthermore, when the range of the area of the first region R1 to the area of the visible region Rd is three-fifths or more, the effect of suppressing multi-finger touch signal coupling is better. To sum up the above two results, the total area of the third sub-region SR3 and the first sub-region SR1 in this embodiment occupies an area of the area of the visible region Rd ranging from one-fifth to four-fifths, preferably three-fifths. . On the other hand, in the first direction D1, the ratio of the length of the third sub-region SR3 to the length of the visible region Rd in this embodiment is 3: 5, but it is not limited thereto. In addition, because the third sub-region SR3 is provided, the area of the touch sensing pad 114a in the first sub-region SR1 becomes smaller, thereby reducing the number of overlaps between the touch sensing pad 114a and the active switching element below. Therefore, the noise generated by the active switching element can be relatively reduced.

Please refer to FIG. 12A, FIG. 12B, and FIG. 13. FIG. 12A illustrates a schematic diagram of a first substrate of a third embodiment of the present invention, and FIG. 12B illustrates a first substrate of a third embodiment of the present invention. An exploded schematic view of the substrate, and FIG. 13 is a schematic cross-sectional view of a first substrate according to a third embodiment of the present invention, taken along a tangent line DD ′ in FIG. 12A. In order to clearly show the connection relationship between the touch sensing pad, the lead wire, and the driving circuit in this embodiment, FIG. 12A and FIG. 12B do not depict the overlapping feature of the lead wire and the data line. In addition, the cross-sectional view of the first substrate 10 in FIG. 13 also shows the second substrate 20 and the display medium layer 30 corresponding thereto. As shown in FIG. 12A, FIG. 12B, and FIG. 13, this embodiment is different from the second embodiment in that the periphery of each third sub-region SR3 is surrounded by the touch sensing pad 114. In other words, the second common electrode 126 in this embodiment is not disposed on the edge of the visible region Rd. Therefore, the touch sensing pads 114 disposed on the upper and lower edges of the visible region Rd do not have the relationship of the second common electrode 126 to enable sensing. The area is larger. In addition, the third sub-region SR3 of this embodiment is arranged in a “T-shape” with two adjacent touch sensing pads 114 located in the second region R2, that is, the third sub-region SR3 is disposed on any two adjacent regions. Between the first sub-regions SR1 and occupying a part of the area of two adjacent first sub-regions SR1 respectively, and each third sub-region SR3 corresponds to the two touch sensing pads 114 in the second region R2 . With this arrangement, compared with the touch sensing pad 114c in the first sub-region SR1 located between the two third sub-regions SR3, the touch in the first sub-region SR1 located on the left and right edges of the visible region Rd The sensing pad 114b has a larger area. Since the touch display panel generally has poor touch sensing capability at the edge of the visible area, this embodiment does not set the dummy second common electrode 126 near the edge of the visible area Rd to avoid affecting the touch display panel. 3 Touch capability at the edge of the visible area Rd. In addition, in this embodiment, the first region R1 and the third region R3 may be selectively provided with the conductive pattern 110 or not provided with the conductive pattern 110. When the conductive pattern 110 is provided, they may be shared with the first common electrode 108 or the second common electrode 108, respectively. The electrodes 126 are connected to each other, but not limited thereto. The remaining features of the touch display panel 3 of this embodiment may be the same as those of the first embodiment and the second embodiment, and reference may be made to FIGS. 1 to 7 and FIGS. 10A to 11, and details are not described herein again.

In summary, the touch display panel of the present invention covers the wires in the first region by the first common electrode and the conductive pattern, which can provide a shielding effect on the wires and avoid the parasitic capacitance between the wires and fingers. Unnecessary noise. On the other hand, by providing a conductive pattern interconnected with the first common electrode, the resistance of the touch sensing pad can also be reduced. In addition, the touch display panel of the present invention can be provided with a second common electrode in the third region, and it is not used to sense touch and is not connected to the first common electrode. The two common electrodes generate capacitive coupling without causing additional noise or false alarm points. In addition, due to the relationship of the third sub-region, the area of the touch sensing pad in the first sub-region is reduced, and the number of overlaps between the touch sensing pad and the active switching element below is reduced. Noise generated by active switching element interference. In addition, by providing a second common electrode in the third region near the driving circuit, the area of the touch sensing pad in the first sub-region can be made smaller than that of the touch sensing pad in the second region, thereby reducing the The difference between the signal strength of the touch sensing pads in the second region and the signal strength of the touch sensing pads in the first sub-region can reduce the difficulty of determining the touch position. Furthermore, the second common electrode may not be disposed at the edge of the visible area, so that the touch sensing pad at the edge of the visible area may have a larger area to avoid affecting the touch capability of the control display panel at the edge of the visible area. The above description is only a preferred embodiment of the present invention, and all equivalent changes and modifications made in accordance with the scope of patent application of the present invention shall fall within the scope of the present invention.

1A, 1B, 1C, 2, 3‧‧‧ touch display panel
10‧‧‧ the first substrate
20‧‧‧ second substrate
30‧‧‧Display media layer
100‧‧‧Touch display array
102‧‧‧Drive circuit
104‧‧‧scan line
106‧‧‧ Data Line
108‧‧‧The first common electrode
108m‧‧‧ Backbone
108b, 108c‧‧‧ branch
110‧‧‧ conductive pattern
112‧‧‧Wire
113‧‧‧contact hole
114, 114a, 114b, 114c‧‧‧Touch Sensing Pad
116, 116a‧‧‧pixel electrode
118‧‧‧The first insulation layer
120‧‧‧Second insulation layer
122‧‧‧Third insulation layer
124‧‧‧ flat layer
126‧‧‧Second common electrode
D1‧‧‧ first direction
D2‧‧‧ Second direction
P‧‧‧times pixels
R1‧‧‧ District 1
R2‧‧‧Second District
R3‧‧‧Third District
Rd‧‧‧ Viewable Area
S‧‧‧Slit
SR1‧‧‧ the first subregion
SR3 ‧‧‧ the third sub-region
V‧‧‧ vertical projection direction
X‧‧‧ area
Y‧‧‧area

FIG. 1 is a schematic cross-sectional view of a touch display panel according to a first embodiment of the present invention. FIG. 2A is a schematic diagram illustrating a first substrate of the first embodiment of the present invention. FIG. 2B illustrates an exploded view of the first substrate of the first embodiment of the present invention. FIG. 3 is a partially enlarged schematic diagram of the first common electrode and the lead in the region X in FIG. 2A. FIG. 4 is a schematic cross-sectional view of the first substrate according to the first embodiment of the present invention along the tangent line A1-A1 'in FIG. 3. FIG. FIG. 5 is a schematic cross-sectional view of the first substrate according to the first embodiment of the present invention along the tangent line A2-A2 'in FIG. 3. FIG. FIG. 6 is a partial enlarged schematic diagram of the first common electrode, the conductive pattern, and the lead in the region Y in FIG. 2A. FIG. 7 is a schematic cross-sectional view of the first substrate according to the first embodiment of the present invention, taken along a tangent line B-B 'in FIG. 6. FIG. 8 is a schematic cross-sectional view of a first region of a first substrate of a first variation of the first embodiment of the present invention. FIG. 9 is a schematic cross-sectional view of a first region of a first substrate of a second variation of the first embodiment of the present invention. FIG. 10A illustrates a schematic diagram of a first substrate according to a second embodiment of the present invention. FIG. 10B illustrates an exploded view of the first substrate of the second embodiment of the present invention. Fig. 11 is a schematic cross-sectional view of a first substrate according to a second embodiment of the present invention, taken along a tangent line C-C 'in Fig. 10A. FIG. 12A is a schematic diagram of a first substrate according to a third embodiment of the present invention. FIG. 12B illustrates an exploded view of the first substrate of the third embodiment of the present invention. Fig. 13 is a schematic cross-sectional view of a first substrate according to a third embodiment of the present invention, taken along a tangent line D-D 'in Fig. 12A.

1A‧‧‧Touch display panel

10‧‧‧ the first substrate

20‧‧‧ second substrate

30‧‧‧Display media layer

106‧‧‧ Data Line

108b‧‧‧ branch

110‧‧‧ conductive pattern

112‧‧‧Wire

116‧‧‧pixel electrode

118‧‧‧The first insulation layer

120‧‧‧Second insulation layer

122‧‧‧Third insulation layer

124‧‧‧ flat layer

D2‧‧‧ Second direction

V‧‧‧ vertical projection direction

Claims (20)

A touch display panel includes: a substrate, wherein the substrate has a visible area, and the visible area includes a first area and a second area; a driving circuit is disposed on the substrate and is located outside the visible area One side, and the first area is located between the second area and the driving circuit; and a touch display array is disposed on the substrate and located in the visible area, the touch display array includes: a plurality of scans Lines and a plurality of data lines are staggered with each other to define a plurality of sub-pixels; a plurality of first common electrodes are respectively disposed in the sub-pixels in the first area and the second area, wherein the first The common electrodes are connected to each other to form a plurality of touch-sensing pads, and the touch-sensing pads are arranged in an array; a plurality of conductive patterns are respectively disposed in the sub-pixels of the first region; and A plurality of wires are respectively disposed between the substrate and the first common electrodes, wherein each of the wires is electrically connected to at least one of the touch sensing pads, and at least one of the wires located in the first region is connected to Vertical projection At least one of the first common electrodes and at least one of the conductive patterns overlap upward, and each of the wires located in the second area is partially covered by the first common electrodes in the vertical projection direction. For example, the touch display panel of claim 1, wherein each of the wires located in the second region is not at least partially covered by the first common electrodes in the vertical projection direction. For example, the touch display panel of claim 1, wherein the wires are disposed between the data lines and the first common electrodes, and the wires are respectively overlapped with one of the data lines in the vertical projection direction. . For example, the touch display panel of claim 1, wherein the conductive patterns are the same patterned conductive layer as the first common current, and the conductive patterns are respectively corresponding to the corresponding one of the sub pixels. A common electrode is connected to each other. For example, the touch display panel of claim 1, wherein the touch display array further includes a plurality of pixel electrodes, which are respectively disposed in the sub pixels in the first region and the second region, and the pixel electrodes It is disposed between the first common electrodes and the substrate. For example, the touch display panel of claim 1, wherein the touch display array further includes a plurality of pixel electrodes, which are respectively disposed in the sub pixels in the first area and the second area, and the first common The electrode is disposed between the pixel electrodes and the substrate. For example, the touch display panel of claim 1, wherein the visible area further includes a third area between the second area and the driving circuit, and the touch display array further includes a plurality of second common electrodes respectively disposed on the area. Among the pixels in the third zone. The touch display panel of claim 7, wherein the second common electrode and the first common electrode are not connected to each other. If the touch display panel of claim 7, wherein the third region includes a plurality of third sub-regions, the first region includes a plurality of first sub-regions, the third sub-regions and the first sub-regions run along the One extending direction of the second region is alternately arranged between the second region and the driving circuit. For example, the touch display panel of claim 9, wherein the sum of the areas of the first sub-regions and the third sub-regions occupies an area of the visible area ranging from one fifth to four fifths. The touch display panel of claim 9, wherein each of the third sub-regions is surrounded by the touch sensing pads. For example, the touch display panel of claim 9, wherein a width ratio of each of the third sub-regions to each of the first sub-regions ranges from 1: 3 to 1: 6. The touch display panel as claimed in claim 7, wherein the first common electrodes and the second common electrodes have the same patterned conductive layer. A touch display panel includes: a substrate, wherein the substrate has a visible area, and the visible area includes a first area, a second area, and a third area; a driving circuit is disposed on the substrate and Located on one side outside the visible area, and the first area and the third area are located between the second area and the driving circuit; and a touch display array is disposed on the substrate and located in the visible area, The touch display array includes: a plurality of scanning lines and a plurality of data lines, which are mutually staggered to define a plurality of sub-pixels; a plurality of first common electrodes are respectively disposed in the first area and the second area. In the sub-pixels, the first common electrodes are connected to each other to form a plurality of touch sensing pads, and the touch sensing pads are arranged in an array; a plurality of second common electrodes are respectively disposed on the Among the sub-pixels in the third area; and a plurality of wires are respectively disposed between the substrate and the first common electrode and the second common electrode, wherein each of the wires and at least one of the touch sense Electrical connection of test pad Where the first region includes a plurality of first sub-regions, the third region includes a plurality of third sub-regions, and the first sub-regions and the third sub-regions are alternately arranged along an extension direction of the second region Between the second region and the driving circuit. For example, the touch display panel of claim 14, wherein the total area of the first sub-regions and the third sub-regions occupies an area of the visible area ranging from one-fifth to four-fifths. The touch display panel of claim 14, wherein each of the third sub-regions is surrounded by the touch sensing pads. For example, the touch display panel of claim 14, wherein a width ratio of each of the third sub-regions to each of the first sub-regions ranges from 1: 3 to 1: 6. The touch display panel as claimed in claim 14, wherein the first common electrodes and the second common electrodes have the same patterned conductive layer. For example, the touch display panel of claim 18, wherein the touch display array further includes a plurality of pixel electrodes respectively disposed in the sub pixels in the visible area, and the pixel electrodes are disposed in the first The common electrode and the second common electrodes are between the substrate and the substrate. For example, the touch display panel of claim 18, wherein the touch display array further includes a plurality of pixel electrodes respectively disposed in the sub pixels in the visible area, the first common electrode and the second pixel The common electrode is disposed between the pixel electrodes and the substrate.