TWI590129B - Touch display panel - Google Patents

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. In such products, the original display panel area is mainly given the function of touch sensing, and the original simple display panel is converted into a touch display panel with touch recognition function. According to the structural design of the touch display panel, the touch panel can be generally classified into an out-cell and an in-cell touch panel, wherein the in-cell touch panel is not Additional touch panels need to be made to make the product thinner and lighter, and the cost of making the touch panel is saved and the price advantage is more. Since the touch elements of the in-cell touch display panel are directly processed on the inner surface of the display panel, the distance between the sensing pads of the touch panel and the components in the display panel is relatively easy, so that it is relatively easy. The problem of capacitive coupling is created. In addition, the operation principle of the capacitive touch panel is to use the sensing pad to detect the capacitance change of the touch point, and determine the position of the touch point according to the change of the capacitance. Therefore, unnecessary capacitive coupling may affect the sensing pad and cause noise, or it may be prone to false alarms.

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

To achieve the above objective, 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 of 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 located in the 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 scan lines and the data lines are interleaved 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, wherein 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 the wires are electrically connected to the at least one touch sensing pad, and the at least one wire located in the first region is in common with at least one first in a vertical projection direction. The electrode and the 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 objective, the present invention further provides a touch display panel comprising 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 of 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 located in the 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 scan lines and the data lines are interleaved 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, wherein 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 sub-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 of the wires is electrically connected to the 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, and the first sub-region and the third sub-region are alternately arranged between the second region and the driving circuit along one of the extending directions of the second region .

The present invention will be further understood by those of ordinary skill in the art to which the present invention pertains. .

Please refer to FIG. 1 , which is a 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 the present 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 comprise a glass substrate, a plastic substrate or other suitable rigid or flexible substrate. The first substrate 10 of the embodiment is a glass substrate, but is not limited thereto. The first substrate 10 can be, for example, an array substrate, which can optionally include an active device (eg, a thin film transistor), a passive component (eg, a capacitor, a resistor, etc.) or other suitable component disposed on the display dielectric layer 30 and the first substrate 10 The second substrate 20 may be, for example, a counter substrate, which may optionally include a color filter, a black matrix or other suitable components disposed between the display medium layer 30 and the second substrate 20, but not 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 a matrix substrate (COA) or a black matrix. Black matrix on array (BOA). The display medium layer 30 can be, for example, a liquid crystal layer or an electrophoresis, but is not limited thereto. In the present 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 variations, the touch display panel can also drive the display medium layer 30 or other suitable type of display medium layer 30 in other types of In-Plane Switching mode.

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

The touch display panel 1A of the present embodiment is an in-cell touch display panel. The first common electrode 108 is used for sensing touch, in addition to being used for display. As shown in FIG. 3, the first common electrode 108 includes a trunk portion 108m extending substantially in the second direction D2, and a branch portion 108b extending substantially in the first direction D1, and the branch portion 108b There is a slit S between them, but not limited thereto. One end of each of the wires 112 is electrically connected to one touch sensing pad 114, and the other end is electrically connected to the driving circuit 102. For example, as shown in FIG. 4, the wire 112 can be directly connected to the trunk portion 108m of the first common electrode 108 in the touch sensing pad 114 by 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 of the capacitance detected by the touch sensing pad 114 through the wire 112 . The touch display panel 1A of the present embodiment is a self-contained touch display panel. The driving circuit 102 can transmit the sensing signal to the touch sensing pad 114 through the wire 112, thereby detecting the touch sensing pad 114 and the finger. The capacitance change between or caused, and determine the location of the touch, but not limited to this. In addition, the wire 112 may be disposed between the first substrate 10 and the first common electrode 108, for example, in the vertical projection direction V, but is not limited thereto. As shown in FIGS. 2A, 3, and 5, in the second region R2 of the first substrate 10, only a portion of the wire 112 in the vertical projection direction V is covered by the first common electrode 108, and in some There is no wire 112 passing through the secondary pixel P. For example, the wires 112 may extend in the first direction D1 and thus may be staggered and partially overlapped with the stem portion 108m of the first common electrode 108 extending in the second direction D2. In other words, each of the wires 112 located in the second region R2 has at least a portion that is not covered by the first common electrode 108. As shown in FIG. 2A, FIG. 6 and FIG. 7, in the first region R1 of the first substrate 10, in addition to the first common electrode 108 disposed in the sub-pixel P, the conductive pattern 110 is separately disposed. 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, and the conductive pattern 110 and the first common electrode 108 are the same patterned conductive layer. Therefore, it can also be produced at the same time. Thereby, at least one of the wires 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 closer to the driving component 102, a plurality of wires 112 pass 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, the shielding effect can be provided to avoid parasitic capacitance between the wire 112 and the finger, so as to suppress the signal coupling generated by the multi-finger touch with the wire 112. Further, Table 1 lists the results of the area of the first region R1 occupying the area of the visible region Rd at different ratios (area of the first region R1 / area of the visible region Rd), and the results are shown in Table 1 below.

Table 1         <TABLE border="1" borderColor="#000000" width="_0001"><TBODY><tr><td> Area of R1 in the first zone/area of the visible zone Rd</td><td> Less than five points One of </td><td> three-fifths </td><td> is greater than four-fifths </td></tr><tr><td> suppresses the effect of multi-finger touch signal coupling</ Td><td> △ </td><td> ○ </td><td> ◎ </td></tr></TBODY></TABLE>

◎: the best effect

○: Good effect

△: small effect

As shown in FIG. 1 , in the touch display panel 1A of the present embodiment, when the area of the first area R1 occupies more than five-fifths of the area of the visible area Rd, the effect of suppressing multi-finger touch signal coupling is better. 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, and in different pixels P The pixel electrodes 116 are separated from each other. The pixel electrode 116 is disposed between the wire 112 and the first common electrode 108, but is not limited thereto. In other variant embodiments, the wires 112 may also be disposed on the same plane or on the same insulating layer as the pixel electrodes 116. In addition, the pixel electrode 116 of the embodiment does not have a slit, but is not limited thereto. The conductive pattern 110 and the first common electrode 108 are coplanar with at least a portion of the first common electrode 108 except for the same patterned conductive layer. The pixel electrode 116 and the first common electrode 108 can be transparent electrodes, such as indium tin oxide electrodes, other suitable materials, or a stack of the foregoing materials. The wire 112 of the present embodiment is disposed between the data line 106 and the first common electrode 108, and the data line 106 and the wire 112 overlap in the vertical projection direction V. The material of the wires 112, the data lines 106 and the scan lines 104 may be a metal, an alloy or other suitable material 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 second The insulating layer 120 is disposed between the pixel electrode 116 and the wire 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 wire 112 and the data line 106. The material 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, and the inorganic insulating material may be, for example, hafnium oxide, tantalum nitride, or nitrogen. Cerium oxide, other suitable materials, or a combination of the foregoing materials may be stacked, such as acryl, photoresist, epoxy, other suitable materials, or a combination of the foregoing. In addition, each pixel P may include an active switching element (not shown), which may be electrically connected to the corresponding scan line 104, the data line 106, and the pixel electrode 116, and may be disposed on the flat layer 124 and the first substrate 10. The functions and structural configurations of the active switching elements are known to those of ordinary skill in the art and will not be described herein.

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

Please refer to FIG. 8 , which is a cross-sectional view showing the first region of the first substrate of the first modified embodiment of the first embodiment of the present invention, wherein the first substrate 10 of FIG. 8 is a cross-sectional view of the first substrate 10 . The second substrate 20 and the display medium layer 30 corresponding thereto are shown. As shown in FIG. 8, the difference between the embodiment and the first embodiment is that the wire 112 is disposed on the same plane as the pixel electrode 116. In this case, the touch display panel 1B can be omitted. The second insulating layer 120 in the figure. Please refer to FIG. 9 , which is a cross-sectional view showing a first region of a first substrate of a second modified embodiment of the first embodiment of the present invention, wherein a cross-sectional view of the first substrate 10 of FIG. 9 is taken along with The second substrate 20 and the display medium layer 30 corresponding thereto are shown. As shown in FIG. 9 , the first embodiment of the present invention 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 pixel is 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, wherein at least a portion of the conductive pattern 110 is coplanar with at least a portion of the first common electrode 108, and is located in the first region R1. The conductive pattern 110 is connected to the first common electrode 108. The remaining features of the touch display panels 1B, 1C of the first and second modified embodiments may be the same as those of the first embodiment, and reference may be made to FIGS. 1 through 7, and details are not described herein again. Furthermore, the features of the above first variation embodiment and second variation embodiment are also applicable to the following embodiments.

Please refer to FIG. 10A, FIG. 10B and FIG. 11 , FIG. 10A is a schematic diagram of a first substrate according to a second embodiment of the present invention, and FIG. 10B is a first embodiment of the second embodiment of the present invention. FIG. 11 is a schematic cross-sectional view showing the first substrate of the second embodiment of the present invention taken along line C-C' of FIG. 10A. In order to clearly show the connection relationship between the touch sensing pad, the wire and the driving circuit of the embodiment, the features of the overlapping of the wire and the data line are not depicted in FIGS. 10A and 10B. In addition, the cross-sectional view of the first substrate 10 of FIG. 11 together with the second substrate 20 and the display medium layer 30 corresponding thereto are shown. As shown in FIG. 10A, FIG. 10B and FIG. 11, the difference between this embodiment and the first embodiment is that the visible area Rd further includes a third area R3, and the third area R3 is located in the second area R2 and the driving circuit. Between 102. The first region R1 of the embodiment 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 second region R2. (ie the second direction D2) is alternately arranged. In addition, the area of each of the first sub-areas SR1 and the third sub-areas SR3 corresponds to an area of a column or a row of touch sensing pads 114 in the array of touch sensing pads 114. In this embodiment, the touch display array 100 further includes a second common electrode 126 disposed in the sub-pixel P in the third region R3, and the second common electrode 126 and the first common electrode 108 are not in the same state. connection. In other words, the second common electrode 126 is not part of the touch sensing pad 114 and is not used to sense touch. For example, when the touch display panel 2 displays a screen, the second common electrode 126 and the first common electrode 108 can be applied with the same common voltage, but when the touch display panel 2 senses a touch, only the first common electrode 108 receives the sensing signal, and the second common electrode 126 does not receive the sensing signal, so the second common electrode 126 can be regarded as a dummy electrode during the touch operation. In addition, the second common electrode 126 of the embodiment may have a slit like the first common electrode 108, but 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 or may not be connected to each other. 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 portion of the first common electrode 108 and at least a portion of the second common electrode 126 are coplanar. In addition, in the embodiment, the first region R1 and the third region R3 may selectively provide the conductive pattern 110 or not the conductive pattern 110. When the conductive pattern 110 is disposed, it may be shared with the first common electrode 108 or the second, respectively. The electrodes 126 are connected to each other, but are not limited thereto. The remaining features of the touch display panel 2 of the present embodiment may be the same as those of the first embodiment, and reference may be made to FIGS. 1 to 7 , and details are not described herein again.

Please refer to Table 2, which lists the results of the third sub-region SR3 of the present embodiment 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         <TABLE border="1" borderColor="#000000" width="_0002"><TBODY><tr><td> Width of the third sub-area SR3: width of the first sub-area SR1</td><td> 1:2 </td><td> 1:3 </td><td> 1:4 </td><td> 1:6 </td></tr><tr><td> Touch sense Measure strength </td><td> △ </td><td> □ </td><td> ○ </td><td> ◎ </td></tr><tr><td> Control Sensing Effect</td><td> △ </td><td> □ </td><td> ○ </td><td> ◎ </td></tr><tr><td> Reduce the effect of noise and sensing signal coupling</td><td> ◎ </td><td> ○ </td><td> □ </td><td> △ </td></tr> </TBODY></TABLE>

◎: Best (or maximum)

○: Good (or big)

□: Medium

△: difference (or small)

As shown in Table 2, since the second common electrode 126 in the third region R3 is not used for inductive touch, the touch sensing pad in the first sub-region SR1 is larger when the area of the third sub-region SR3 is larger. The area of 114a is also relatively small, which makes 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 or connection with the first common electrode 108, and thus is generated despite the wire 112 and the second common electrode 126 passing through the third region R3. Capacitive coupling does not cause additional noise or false alarms. 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 remarkable. In this embodiment, the third sub-region SR3 is substantially equal to the length of the first sub-region SR1 in the first direction D1, and the width ratio range of the third sub-region SR3 and the first sub-region SR1 is 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 ranges, for example, from 1 mm to 2.5 mm, and the width of the first sub-region SR1 in the second direction D2 ranges, for example, from 3 mm to 6 mm.

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

table 3         <TABLE border="1" borderColor="#000000" width="_0003"><TBODY><tr><td> Area of the third sub-area SR3 and the first sub-area SR1 and area of the visible area Rd</ Td><td> less than one-fifth</td><td> three-fifths</td><td> is greater than four-fifths</td></tr><tr><td> The effect of touch signal coupling</td><td> △ </td><td> ○ </td><td> ◎ </td></tr><tr><td> shrinks away from the drive circuit 102 End and far end touch sensing signal difference</td><td> △ </td><td> ○ </td><td> △ </td></tr></TBODY></TABLE >

◎: the best effect

○: Good effect (or small difference)

△: The effect is small (or the difference is large)

Since the touch sensing pad 114 located in the second area R2 is far away from the driving circuit 102, the degree of attenuation of the inductive signal transmitted to the driving circuit 102 is relatively serious. The second common electrode 126 is disposed in the third region R3 adjacent to the driving circuit 102, so that the area of the touch sensing pad 114a in the first sub-region SR1 is smaller than the touch sensing pad 114 in the second region R2. The area, and thus the difference between the signal intensity of the touch sensing pad 114 in the second region R2 and the signal intensity of the touch sensing pad 114a in the first sub-region SR1, can reduce the difficulty in determining the touch position. As shown in Table 3, when the area of the third sub-region SR3 occupying the visible region Rd is too small or too large, the effect of reducing the signal intensity difference in the second region R2 and the first sub-region SR1 is not sufficient. Moreover, when the area of the first region R1 occupies more than three-fifths of the area of the visible region Rd, the effect of suppressing multi-finger touch signal coupling is better. In summary, the total area of the third sub-area SR3 and the first sub-area SR1 of the present embodiment accounts for one-fifth to four-fifths, preferably three-fifths of the area of the visible area Rd. . On the other hand, in the first direction D1, the ratio of the length of the third sub-region SR3 of the present embodiment to the length of the visible region Rd is 3:5, but is not limited thereto. In addition, the area of the touch sensing pad 114a in the first sub-region SR1 is reduced due to the relationship between the third sub-regions SR3, and the number of overlaps between the touch sensing pads 114a and the underlying active switching elements is reduced. 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 is a schematic diagram of a first substrate according to a third embodiment of the present invention, and FIG. 12B is a first embodiment of the third embodiment of the present invention. FIG. 13 is a schematic cross-sectional view showing the first substrate of the third embodiment of the present invention taken along line DD' of FIG. 12A. In order to clearly show the connection relationship between the touch sensing pad, the wire and the driving circuit of the embodiment, the features of the overlapping of the wire and the data line are not depicted in FIGS. 12A and 12B. In addition, the cross-sectional view of the first substrate 10 of FIG. 13 together with the second substrate 20 and the display medium layer 30 corresponding thereto. As shown in FIG. 12A, FIG. 12B and FIG. 13 , the difference between this embodiment and the second embodiment is that the periphery of each of the third sub-regions SR3 is surrounded by the touch sensing pad 114 . In other words, the second common electrode 126 of the present embodiment is not disposed at the edge of the visible area Rd. Therefore, the touch sensing pad 114 disposed on the upper and lower edges of the visible area Rd can be inducted because the second common electrode 126 is not disposed. The area is large. In addition, the third sub-region SR3 of the present embodiment and the two touch sensing pads 114 located adjacent to the second region R2 are arranged in a “T-shape”, that is, the third sub-region SR3 is disposed in any two adjacent regions. Between the first sub-areas SR1 and occupying a partial area of the adjacent two first sub-areas SR1, and each of the third sub-areas SR3 corresponds to the two touch-sensing pads 114 in the second area R2. . With this arrangement, in comparison with the touch sensing pad 114c in the first sub-region SR1 between the two third sub-regions SR3, the touch in the first sub-region SR1 at the left and right edges of the visible region Rd The control pad 114b has a large area. Since the touch display panel generally has poor ability for touch sensing at the edge of the visible area, the present embodiment does not place the dummy second common electrode 126 at a position adjacent to the edge of the visible area Rd to avoid affecting the touch display panel. 3 touch ability at the edge of the visible area Rd. In addition, in the embodiment, the first region R1 and the third region R3 may selectively provide the conductive pattern 110 or not the conductive pattern 110. When the conductive pattern 110 is disposed, it may be shared with the first common electrode 108 or the second, respectively. The electrodes 126 are connected to each other, but are not limited thereto. The remaining features of the touch display panel 3 of the present 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 will not be further described herein.

In summary, the touch display panel of the present invention covers the wires in the first region by using the first common electrode and the conductive pattern, thereby providing a shielding effect on the wires and avoiding parasitic capacitance between the wires and the 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 provide a second common electrode in the third region, and is not used for sensing touch or connecting with the first common electrode, so the wire and the third portion pass through The two common electrodes create capacitive coupling and do not cause additional noise or false alarms. In addition, since the area of the touch sensing pad in the first sub-area is reduced due to the relationship of the third sub-area, the number of overlaps between the touch-sensing pad and the lower active switching element is reduced, so that the relative reduction can be relatively reduced. The active switching element interferes with the noise generated. In addition, by providing the second common electrode in the third region of the driving circuit, the area of the touch sensing pad in the first sub-area is smaller than the area of the touch sensing pad in the second region, thereby reducing the The difference between the signal intensity of the touch sensing pad in the second area and the signal intensity of the touch sensing pad in the first sub-area can reduce the difficulty in 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 are only the preferred embodiments of the present invention, and all changes and modifications made to the scope of the present invention should be within the scope of the present invention.

1A, 1B, 1C, 2, 3‧‧‧ touch display panel

10‧‧‧First substrate

20‧‧‧second substrate

30‧‧‧Display media layer

100‧‧‧Touch display array

102‧‧‧ drive circuit

104‧‧‧ scan line

106‧‧‧Information line

108‧‧‧First common electrode

108m‧‧‧Main section

108b, 108c‧‧‧ branch

110‧‧‧ conductive pattern

112‧‧‧Wire

113‧‧‧Contact hole

114, 114a, 114b, 114c‧‧‧ touch sensing pads

116, 116a‧‧‧ pixel electrodes

118‧‧‧First insulation

120‧‧‧Second insulation

122‧‧‧ third insulation

124‧‧‧flat layer

126‧‧‧Second common electrode

D1‧‧‧ first direction

D2‧‧‧ second direction

P‧‧‧ pixels

R1‧‧‧ first district

R2‧‧‧Second District

R3‧‧‧ Third District

Rd‧‧‧visible area

S‧‧ slit

SR1‧‧‧ first subregion

SR3‧‧‧ third subregion

V‧‧‧Vertical projection direction

X‧‧‧ area

Y‧‧‧ area

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

1A‧‧‧Touch display panel

10‧‧‧First substrate

20‧‧‧second substrate

30‧‧‧Display media layer

106‧‧‧Information line

108b‧‧‧ branch

110‧‧‧ conductive pattern

112‧‧‧Wire

116‧‧‧pixel electrodes

118‧‧‧First insulation

120‧‧‧Second insulation

122‧‧‧ third insulation

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 located outside the visible area One of the sides, and the first area is located between the second area and the driving circuit; and a touch display array disposed on the substrate and located in the visible area, the touch display array includes: a plurality of scans The line and the plurality of data lines are interleaved to define a plurality of sub-pixels; and the plurality of first common electrodes are respectively disposed in the first and second sub-pixels in 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 manner; a plurality of conductive patterns are respectively disposed in the sub-pixels of the first region; a plurality of wires are respectively disposed between the substrate and the first common electrodes, wherein each of the wires is electrically connected to the at least one touch sensing pad, and at least one of the wires located in the first region is tied to In a vertical projection direction At least one of the plurality of first common electrode and at least one of these conductive patterns overlap, and each is located in the second region of the lead portion in the direction perpendicular projection of such a first common electrode covers. The touch display panel of claim 1, wherein each of the wires located in the second region is at least partially not covered by the first common electrodes in the vertical projection direction. The touch display panel of claim 1, wherein the wires are disposed between the data lines and the first common electrodes, and the wires overlap with one of the data lines respectively in the vertical projection direction. . The touch display panel of claim 1, wherein the conductive patterns are substantially the same patterned conductive layer as the first common currents, and the conductive patterns are respectively associated with each of the corresponding sub-pixels A common electrode is connected to each other. The touch display panel of claim 1, wherein the touch display array further comprises a plurality of pixel electrodes respectively disposed in the second pixel and the second pixels in the second region, the pixel electrodes The first common electrode is disposed between the first common electrode and the substrate. The touch display panel of claim 1, wherein the touch display array further comprises a plurality of pixel electrodes respectively disposed in the first and second pixels in the second region, the first common An electrode system is disposed between the pixel electrodes and the substrate. The touch display panel of claim 1, wherein the visible area further comprises a third area between the second area and the driving circuit, and the touch display array further comprises a plurality of second common electrodes respectively disposed on the The sub-pixels in the third zone. The touch display panel of claim 7, wherein the second common electrodes and the first common electrodes are not connected to each other. The touch display panel of claim 7, wherein the third area comprises a plurality of third sub-areas, the first area includes a plurality of first sub-areas, and the third sub-areas and the first sub-areas One of the extension directions of the second region is alternately arranged between the second region and the driving circuit. The touch display panel of claim 9, wherein the first sub-areas and the third sub-areas The sum of the area of the domain accounts for one-fifth to four-fifths of the area of the visible area. The touch display panel of claim 9, wherein each of the third sub-areas is surrounded by the touch sensing pads. 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 of claim 7, wherein the first common electrode and the second common current are substantially 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 of 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 disposed on the substrate and located in the visible area The touch display array includes: a plurality of scan lines and a plurality of data lines, which are interleaved to define a plurality of sub-pixels; and a plurality of first common electrodes are respectively disposed in the first area and the second area In the sub-pixel, 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; a plurality of second common electrodes are respectively disposed on the In the sub-pixels of the third region, wherein the second common electrodes and the first common electrodes are not connected to each other; a plurality of wires are disposed between the substrate and the first common electrode and the second common electrode, wherein each of the wires is electrically connected to the at least one touch sensing pad, and is located in the first region At least one of the wires is overlapped with at least one of the first common electrodes in a vertical projection direction; wherein 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-regions are alternately arranged between the second region and the driving circuit along a direction in which one of the second regions extends. The touch display panel of claim 14, wherein the sum of the area of the first sub-area and the third sub-area occupies a range of one-fifth to four-fifth of the area of the visible area. The touch display panel of claim 14, wherein each of the third sub-areas is surrounded by the touch sensing pads. 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 of claim 14, wherein the first common electrode and the second common current are substantially the same patterned conductive layer. The touch display panel of claim 18, wherein the touch display array further comprises a plurality of pixel electrodes respectively disposed in the sub-pixels of the visible area, wherein the pixel electrodes are disposed in the first The common electrode and the second common electrode are between the substrate. The touch display panel of claim 18, wherein the touch display array further comprises a plurality of pixel electrodes respectively disposed in the sub-pixels in the visible area, the first common electrodes and the second A common electrode is disposed between the pixel electrodes and the substrate.