CN106445240B - Touch control display panel - Google Patents

Abstract

The present invention discloses a touch display panel, comprising a substrate, a driving circuit and a touch display array. The substrate comprises a first area and a second area, and the first area is located between the second area and the driving circuit. The touch display array comprises scan lines, data lines, a first common electrode, a conductive pattern and a wire. The scan lines and the data lines are staggered to define sub-pixels. The first common electrode is arranged in the sub-pixels of the first area and the second area, and the first common electrodes are interconnected to form a touch sensing pad. The conductive pattern is arranged in the sub-pixels of the first area. Each wire is electrically connected to at least one touch sensing pad, at least one wire located in the first area overlaps with at least one first common electrode and at least one conductive pattern in a vertical projection direction, and each wire located in the second area is partially covered by the first common electrode in the vertical projection direction.

Description

touch display panel

technical field

The present invention relates to a touch display panel, in particular to a touch display panel capable of reducing noise.

Background technique

Touch sensing technology has developed rapidly in recent years, and many consumer electronic products with touch function have been launched one after another. In such products, the original area of the display panel is mainly given the function of touch sensing, or it can be said that the original simple display panel is transformed into a touch display panel with touch recognition function. According to the difference in the structural design of the touch display panel, it can generally be divided into an out-cell type (out-cell) and an in-cell type (in-cell or on-cell) touch display panel, wherein the in-cell touch display panel is not It is necessary to make an additional touch panel, so that the product becomes thinner and lighter, and the cost of making the touch panel is also saved, resulting in a price advantage. Since the touch elements of the in-cell touch display panel are directly fabricated on the inner surface of the display panel, the distance between the sensing pads of the touch panel and the elements in the display panel is relatively close, so it is easier to produce Capacitive coupling problem. In addition, the operating principle of the capacitive touch panel is to use the sensing pad to detect the capacitance change of the touch point, and to determine the position of the touch point according to the capacitance change. Therefore, unnecessary capacitive coupling may affect the sensing pad and cause noise, or it is easy to generate false alarm points.

SUMMARY OF THE INVENTION

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 control.

To achieve the above objective, the present invention provides a touch display panel including a substrate, a driving circuit and a touch display array. There is a visible area on the substrate, and the visible area includes a first area and a second area. The driving circuit is arranged on the substrate and is 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 arranged on the substrate and is 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 staggered to define a plurality of sub-pixels. The first common electrodes are respectively disposed in the sub-pixels in the first area and the second area, 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. 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 to at least one first common electrode in a vertical projection direction and at least one conductive pattern is overlapped, and each wire in the second area is partially covered by the first common electrode in the vertical projection direction. To achieve the above objective, 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 arranged on the substrate and is 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 arranged on the substrate and is 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 staggered to define a plurality of sub-pixels. The first common electrodes are respectively disposed in the sub-pixels in the first area and the second area, 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. 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 wire is electrically connected to at least one touch sensing pad. The first area includes a plurality of first sub-areas, the third area includes a plurality of third sub-areas, and the first sub-areas and the third sub-areas are alternately arranged between the second area and the driving circuit along an extension direction of the second area .

Description of drawings

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 of the first substrate of the first embodiment of the present invention.

FIG. 2B is an exploded schematic view of the first substrate of the first embodiment of the present invention.

FIG. 3 is a partially enlarged schematic view of the first common electrode and the conducting wire in the region X in FIG. 2A .

FIG. 4 is a schematic cross-sectional view of the first substrate of the first embodiment of the present invention taken along the tangent line A1-A1' of FIG. 3 .

Fig. 5 is a schematic cross-sectional view of the first substrate of the first embodiment of the present invention taken along the tangent line A2-A2' of Fig. 3 .

FIG. 6 is a partially enlarged schematic view of the first common electrode, the conductive pattern and the wires in the area Y in FIG. 2A .

FIG. 7 is a schematic cross-sectional view of the first substrate of the first embodiment of the present invention taken along the line B-B' of FIG. 6 .

FIG. 8 is a schematic cross-sectional view of the first region of the first substrate according to the first variant of the first embodiment of the present invention.

FIG. 9 is a schematic cross-sectional view of the first region of the first substrate according to the second variant of the first embodiment of the present invention.

FIG. 10A is a schematic diagram of a first substrate according to a second embodiment of the present invention.

FIG. 10B is an exploded schematic view of the first substrate according to the second embodiment of the present invention.

FIG. 11 is a schematic cross-sectional view of the first substrate of the second embodiment of the present invention taken along the tangent line C-C' of FIG. 10A .

FIG. 12A is a schematic diagram of a first substrate according to a third embodiment of the present invention.

FIG. 12B is an exploded schematic view of the first substrate according to the third embodiment of the present invention.

FIG. 13 is a schematic cross-sectional view of the first substrate of the third embodiment of the present invention taken along the tangent line D-D' of FIG. 12A .

Among them, reference numerals:

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 lines

106 data cable

108 The first common electrode

108m trunk section

108b, 108c branch part

110 Conductive Pattern

112 wires

113 Contact holes

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

116, 116a pixel electrodes

118 first insulating layer

120 Second insulating layer

122 Third insulating layer

124 Flat layer

126 Second common electrode

D1 first direction

D2 second direction

P sub-pixels

R1 District 1

R2 Zone 2

R3 Third District

Rd viewable area

S slit

SR1 first sub-region

SR3 third sub-region

V Vertical projection direction

X area

Y area

Detailed ways

In order to enable those skilled in the art to which the present invention pertains to further understand the present invention, the preferred embodiments of the present invention are listed below, and together with the accompanying drawings, the composition and desired effects of the present invention 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 glass substrates, plastic substrates or other suitable rigid or flexible substrates. The first substrate 10 in this embodiment is a glass substrate, but not limited thereto. The first substrate 10 can be, for example, an array substrate, which can selectively include active elements (eg, thin film transistors), passive elements (eg, capacitors, resistors, etc.) or other suitable elements disposed between the display medium layer 30 and the first substrate 10 . In the meantime, the second substrate 20 can be, for example, an opposite substrate, which can 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 this is not the case. limit. In addition, at least one of a color filter or a black matrix can also be selectively disposed on the first substrate 10, which can be referred to as a color filter on array (COA) or a black matrix on the first substrate 10. on an array substrate (black matrix on array, BOA). The display medium layer 30 can be, for example, a liquid crystal layer or an electrophoresis layer, but 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 variant embodiments, the touch display panel can also drive the display medium layer 30 in other types of in-plane switching (In-Plane Switching) modes or drive the display medium layer 30 in other suitable types.

Please refer to FIGS. 2A to 7 . FIG. 2A is a schematic diagram of the first substrate of the first embodiment of the present invention, FIG. 2B is an exploded schematic diagram of the first substrate of the first embodiment of the present invention, and FIG. 3 is a schematic diagram of 2A shows a partial enlarged schematic view of the first common electrode and the wire in the region X, FIG. 4 shows a schematic cross-sectional view of the first substrate of the first embodiment of the present invention along the tangent line A1-A1' in FIG. 3 , FIG. 5 A schematic cross-sectional view of the first substrate of the first embodiment of the present invention taken along the tangent line A2-A2' in FIG. 3 is shown, and FIG. 6 is a partially enlarged view of the first common electrode, the conductive pattern and the conductive line in the area Y in FIG. 2A . The schematic diagram, and FIG. 7 is a schematic cross-sectional view of the first substrate of the first embodiment of the present invention taken along the tangent line BB′ of FIG. 6 . In order to highlight the features of the touch display panel of the present embodiment, FIGS. 3 and 6 only illustrate the first common electrode, the conductive pattern and the wires on the first substrate 10 , while the first common electrodes, conductive patterns and wires on the first substrate 10 are shown in FIGS. The cross-sectional view of the substrate 10 also shows the corresponding second substrate 20 and the display medium layer 30 . In addition, in order to clearly show the connection relationship between the touch sensing pads, the wires, and the driving circuit of the present embodiment, FIG. 2A and FIG. 2B do not depict the overlapping feature of the wires and the data lines. As shown in FIGS. 2A to 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 viewing area Rd in which the touch The control display array 100 is located in the visible area Rd, and the driving circuit 102 is located on the side outside the visible area Rd. In addition, 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 scan lines 104 , data lines 106 , first common electrodes 108 , conductive patterns 110 (refer to FIG. 6 ) and wires 112 . The scan lines 104 and the data lines 106 extend in different directions, and define a plurality of sub-pixels P alternately in the visible area Rd. The materials of the scan lines 104 and the data lines 106 may be metals, alloys, or other suitable materials or stacks of the above materials. The first common electrodes 108 are respectively disposed in the sub-pixels 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, and each group is composed of a plurality of sub-pixels. It is composed of two adjacent sub-pixels P, and the first common electrodes 108 in each group are connected to each other to form a touch sensing pad 114 . The number of sub-pixels P included in each group may be adjusted as needed. In other words, the touch display panel 1A of the present embodiment includes a plurality of groups of sub-pixels P, wherein the first common electrodes 108 disposed in the sub-pixels P in each group are connected to each other, and are formed in multiple rows and multiple A plurality of touch sensing pads 114 arranged in an array 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, and the first common electrode 108 is not only used for display, but also used for touch sensing. As shown in FIG. 3 , the first common electrode 108 includes a main portion 108m and a branch portion 108b. The main portion 108m extends substantially along the second direction D2, the branch portion 108b extends substantially along the first direction D1, and the branch portions 108b extend between the branch portions 108b. There is a slit S, but not limited thereto. 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 wires 112 can be directly connected to the trunk portion 108m of the first common electrode 108 in the touch sensing pad 114 through the contact holes 113 , but 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 capacitance detected by the touch sensing pad 114 through the wire 112 . The touch display panel 1A of the present embodiment is a self-capacitance touch display panel, and the driving circuit 102 can transmit the sensing signal to the touch sensing pad 114 through the wire 112 to detect the touch sensing pad 114 and the finger. Changes in capacitance between or caused by, and determine the location of the touch, but not limited to this. In addition, the wires 112 may be disposed between the first substrate 10 and the first common electrode 108 in the vertical projection direction V, for example, but not limited thereto. As shown in FIGS. 2A , 3 and 5 , in the second region R2 of the first substrate 10 , the conductive lines 112 are only partially covered by the first common electrode 108 in the vertical projection direction V, and in some sub-pixels P And no wire 112 passes through. For example, the wires 112 may extend along the first direction D1, and thus intersect and partially overlap with the trunk portion 108m of the first common electrode 108 extending along the second direction D2. In other words, at least a part of each wire 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 disposed in the sub-pixels P, conductive patterns 110 are also disposed in the sub-pixels P respectively. middle. In this embodiment, the line segment of the conductive pattern 110 extending along the first direction D1 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, so Can also be produced at the same time. Thereby, the at least one conductive line 112 in the first region R1 overlaps with the at least one first common electrode 108 and the at least one conductive pattern 110 in the vertical projection direction V. As shown in FIG. Since the distance between the first region R1 and the driving element 102 is relatively close, 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 are used to cover the wires in the first region R1. 112 , which can provide a shielding effect to avoid parasitic capacitance between the wire 112 and the finger, so as to suppress the signal coupling generated by the coaxial multi-touch with the wire 112 . In addition, Table 1 lists the results 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

◎: The best effect

○: Good effect

△: The effect is small

As shown in Table 1, in the touch display panel 1A of this embodiment, when the area of the first region R1 accounts for more than three-fifths of the area of the visible region Rd, the effect of suppressing multi-touch signal coupling is suppressed better. In addition, by arranging 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 disposed in the sub-pixels P in the first region R1 and the second region R2 respectively, and the pixel electrodes 116 in different sub-pixels P are separated from each other . The pixel electrode 116 is disposed between the wire 112 and the first common electrode 108, but not limited thereto. In other variant embodiments, the wires 112 and the pixel electrodes 116 can also be disposed on the same plane or on the same insulating layer. In addition, the pixel electrode 116 of this embodiment does not have a slit, but it is not limited thereto. Apart from the conductive pattern 110 and the first common electrode 108 being 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 indium tin oxide electrodes, other suitable materials, or a stack of the foregoing materials. The wires 112 in this embodiment are disposed between the data lines 106 and the first common electrodes 108 , and the data lines 106 and the wires 112 overlap in the vertical projection direction V. As shown in FIG. The materials of the wires 112 , the data lines 106 and the scan lines 104 can be metals, alloys, or other suitable materials or stacks 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 118 is disposed between the first substrate 10 and the data lines 106 , and the second insulating layer 118 is disposed between the first substrate 10 and the data line 106 . 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 materials of the first insulating layer 118 , the second insulating layer 120 , the third insulating layer 122 and the planarization layer 124 may include inorganic insulating materials, organic insulating materials or a stack of the aforementioned materials, and the inorganic insulating materials may be, for example, silicon oxide, silicon nitride, nitrogen Silicon oxide, other suitable materials or stacks of the aforementioned materials, organic insulating materials may be, for example, acrylic, photoresist, epoxy, other suitable materials or stacks of aforementioned 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 , the data line 106 and the pixel electrode 116 , and may be disposed between the flat layer 124 and the first substrate 10 , the function and structural configuration of the active switch element are known to those skilled 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 touch display panels of other preferred embodiments and modified embodiments of the present invention will be sequentially introduced below, and in order to compare the differences between the embodiments and simplify the description, the same symbols are used in the following embodiments. The same elements are mainly described with respect to the differences of the various embodiments, and repeated parts will not be repeated.

Please refer to FIG. 8 , which shows a schematic cross-sectional view of the first region of the first substrate according to the first variant of the first embodiment of the present invention, wherein the cross-sectional view of the first substrate 10 in FIG. 8 is also shown. The corresponding second substrate 20 and the display medium layer 30 . As shown in FIG. 8 , the difference between this modified embodiment and the first embodiment is that the wires 112 and the pixel electrodes 116 are disposed on the same plane. In this case, the touch display panel 1B can omit the arrangement of the first embodiment in FIG. 7 . Two insulating layers 120 . Please refer to FIG. 9 , which is a schematic cross-sectional view of the first region of the first substrate according to the second variant of the first embodiment of the present invention, wherein the cross-sectional view of the first substrate 10 in FIG. 9 is also shown. The corresponding second substrate 20 and the display medium layer 30 . As shown in FIG. 9 , the difference between this modified embodiment and the first embodiment is 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 electrode 116 a has a narrow 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 part of the conductive pattern 110 and at least a part of the first common electrode 108 are coplanar and located in the first region R1 The conductive patterns 110 and the first common electrodes 108 are connected to each other. The remaining features of the touch display panels 1B and 1C of the first variant embodiment and the second variant embodiment above may be the same as those of the first embodiment, and refer to FIG. 1 to FIG. 7 , which will not be repeated here. Furthermore, the features of the first modified embodiment and the second modified embodiment above can also be applied to the following embodiments.

Please refer to FIG. 10A , FIG. 10B and FIG. 11 , FIG. 10A is a schematic diagram of the first substrate of the second embodiment of the present invention, and FIG. 10B is an exploded schematic diagram of the first substrate of the second embodiment of the present invention, And FIG. 11 is a schematic cross-sectional view of the first substrate of 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 pads, the wires, and the driving circuit of the present embodiment, FIG. 10A and FIG. 10B do not depict the overlapping feature of the wires and the data lines. In addition, the cross-sectional view of the first substrate 10 in FIG. 11 also illustrates the corresponding second substrate 20 and the display medium layer 30 . 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 between the second area R2 and the driving circuit 102 . between. The first region R1 in this 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 are along the extending direction of the second region R2 (ie, the second direction D2) 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 (column) or a row (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 electrodes 126 and the first common electrodes 108 are not connected to each other. . In other words, the second common electrode 126 is not a part of the touch sensing pad 114 and is not used for sensing 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, but when the touch display panel 2 senses a touch, only the first common electrode 108 receives the sensing signal, but 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 this embodiment may have the same slit as the first common electrode 108, but is not limited thereto. In detail, the second common electrodes 126 are 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 can be selectively provided with the conductive pattern 110 or not provided with the conductive pattern 110, and when the conductive pattern 110 is provided, they can be respectively shared with the first common electrode 108 or the second common electrode 108. 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 , which will not be repeated here.

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

Table 2

◎: Best (or largest)

○: 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 for touch sensing, when the area of the third subregion SR3 is larger, the touch sensing pads in the first subregion SR1 The area of 114a is also relatively smaller, 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 sensing touch and is not connected to the first common electrode 108, so although the wire 112 passing through the third region R3 and the second common electrode 126 are generated Capacitive coupling will also 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 also more significant. In this embodiment, the lengths of the third sub-region SR3 and the first sub-region SR1 in the first direction D1 are approximately equal, and in the second direction D2, the width ratio of the third sub-region SR3 and the first sub-region SR1 ranges 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 the area sum 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 sum of the third sub-region SR3 and the first sub-region SR1// The results under the area of viewable area Rd).

table 3

◎: The best effect

○: Good effect (or small difference)

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

Since the touch sensing pads 114 located in the second region R2 are 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 disposing the second common electrode 126 near the third region R3 of the driving circuit 102, the area of the touch sensing pads 114a in the first sub-region SR1 can be made smaller than that of the touch sensing pads 114 in the second region R2. Therefore, the difference between the signal strength of the touch sensing pads 114 in the second region R2 and the signal strength of the touch sensing pads 114a in the first sub-region SR1 can be reduced, which can reduce the difficulty of judging the touch position. As shown in Table 3, when the third sub-region SR3 occupies an area of the visible region Rd that is too small or too large, the reduction effect of the signal intensity difference between the second region R2 and the first sub-region SR1 is not satisfactory. Furthermore, when the area of the first region R1 accounts for more than three-fifths of the area of the visible region Rd, the effect of suppressing multi-touch signal coupling is better. To sum up the above two results, the sum of the areas of the third sub-region SR3 and the first sub-region SR1 in this embodiment accounts for one-fifth to four-fifths of the area of the visible region Rd, preferably one-fifth. three. 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 not limited thereto. In addition, due to the relationship of setting the third sub-region SR3, the area of the touch-sensing pad 114a in the first sub-region SR1 is reduced, thereby reducing the overlap between the touch-sensing pad 114a and the underlying active switch element. Therefore, the noise generated by the active switching element can be relatively reduced.

Please refer to FIGS. 12A , 12B and 13 . FIG. 12A is a schematic diagram of the first substrate according to the third embodiment of the present invention, and FIG. 12B is an exploded schematic diagram of the first substrate according to the third embodiment of the present invention. And FIG. 13 is a schematic cross-sectional view of the first substrate of the third embodiment of the present invention taken along the tangent line DD′ of FIG. 12A . In order to clearly show the connection relationship between the touch sensing pads, the wires, and the driving circuit of the present embodiment, FIG. 12A and FIG. 12B do not depict the overlapping feature of the wires and the data lines. In addition, the cross-sectional view of the first substrate 10 in FIG. 13 also illustrates the corresponding second substrate 20 and the display medium layer 30 . As shown in FIG. 12A , FIG. 12B and FIG. 13 , the difference between the present embodiment and the second embodiment is that the periphery of each third sub-region SR3 is surrounded by touch sensing pads 114 . In other words, the second common electrode 126 in this embodiment is not disposed at the edge of the visible area Rd, so the touch sensing pads 114 disposed at the upper and lower edges of the visible area Rd are not disposed with the second common electrode 126 so that the The area for sensing is larger. In addition, the third sub-region SR3 in this embodiment is arranged in a “T shape” with the two adjacent touch sensing pads 114 in the second region R2, that is, the third sub-region SR3 is arranged in any two adjacent touch pads 114. Between the first sub-regions SR1, respectively occupy part of the area of the two adjacent first sub-regions SR1, 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 pads 114c located in the first sub-region SR1 between the two third sub-regions SR3, the touch-sensing pads in the first sub-region SR1 located at the left and right edges of the visible region Rd The touch sensing pad 114b has a larger area. Since the touch display panel usually 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. Control the touch capability of the display panel 3 at the edge of the visible area Rd. In addition, in this embodiment, the first region R1 and the third region R3 can be selectively provided with the conductive pattern 110 or not provided with the conductive pattern 110, and when the conductive pattern 110 is provided, they can be respectively shared with the first common electrode 108 or the second common electrode 108. 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 , which will not be repeated here.

To sum up, the touch display panel of the present invention uses the first common electrode and the conductive pattern to cover the wires in the first area, so as to provide a shielding effect on the wires and avoid parasitic capacitances between the wires and fingers. unnecessary noise. On the other hand, by arranging the 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 area, which is not used for touch sensing and is not connected to the first common electrode, so although the wires passing through the third area are connected to the first common electrode The two common electrodes create capacitive coupling and do not cause additional noise or false alarm points. In addition, due to the relationship of the setting of the third sub-region, the area of the touch-sensing pad in the first sub-region becomes smaller, which in turn reduces the overlap between the touch-sensing pad and the lower active switch element. Noise generated by active switching element interference. In addition, by arranging the second common electrode in the third area close to the driving circuit, the area of the touch sensing pad in the first sub-area can be made smaller than the area of the touch sensing pad in the second area, thereby reducing the area of the touch sensing pad in the second area. The difference between the signal strength of the touch sensing pads in the second area and the signal strength of the touch sensing pads in the first sub-area can reduce the difficulty of judging 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 can have a larger area, so as to avoid affecting the touch capability of the control display panel at the edge of the visible area. .

The above are only preferred embodiments of the present invention, and all equivalent changes and modifications made according to the protection scope of the claims of the present invention shall fall within the scope of the present invention.

Claims (20)

1. a kind of touch-control display panel characterized by comprising

One substrate wherein has a visible area on the substrate, and the visible area includes one first area and one second area；

One drive circuit, the side for being set on the substrate and being located at outside the visible area, and firstth area be located at secondth area and Between the driving circuit；And

One touch-control array of display is set on the substrate and is located in the visible area, which includes:

Multi-strip scanning line and multiple data lines, it is interlaced with each other to define multiple sub-pixels；

Multiple first common electrodes are respectively arranged in the multiple sub-pixel in firstth area and secondth area, wherein The multiple first common electrode interconnects and forms multiple touch-control sensing pads, and the multiple touch-control sensing pad is with array side Formula arrangement；

A plurality of conductive pattern is respectively arranged in the multiple sub-pixel in firstth area；And

A plurality of conducting wire is respectively arranged between the substrate and the multiple first common electrode, wherein respectively conducting wire and at least one A touch-control sensing pad is electrically connected, at least one the multiple conducting wire in firstth area on a upright projection direction with At least one the multiple first common electrode and at least one the multiple conductive pattern overlapping, and it is located at respectively should in secondth area Conducting wire is covered in part on the upright projection direction by the multiple first common electrode.

2. touch-control display panel as described in claim 1, which is characterized in that respectively conducting wire in secondth area hangs down in this It is not covered by the multiple first common electrode at least partly on straight projecting direction.

3. touch-control display panel as described in claim 1, which is characterized in that the multiple conducting wire is set to the multiple data Between line and the multiple first common electrode, and the multiple conducting wire on the upright projection direction respectively with the multiple number It is overlapped according to one of line.

4. touch-control display panel as described in claim 1, which is characterized in that the multiple conductive pattern and the multiple first Common electrode be same patterned conductive layer, and the multiple conductive pattern respectively with one of corresponding the multiple sub-pixel Respectively first common electrode is connected with each other.

5. touch-control display panel as described in claim 1, which is characterized in that the touch-control array of display further includes multiple pixel electricity Pole is respectively arranged in the multiple sub-pixel in firstth area and secondth area, and the multiple pixel electrode is set to Between the multiple first common electrode and the substrate.

6. touch-control display panel as described in claim 1, which is characterized in that the touch-control array of display further includes multiple pixel electricity Pole is respectively arranged in the multiple sub-pixel in firstth area and secondth area, and the multiple first common electrode is set It is placed between the multiple pixel electrode and the substrate.

7. touch-control display panel as described in claim 1, which is characterized in that the visible area separately include a third area be located at this Between 2nd area and the driving circuit, and the touch-control array of display separately includes that multiple second common electrodes are respectively arranged at the third area In the multiple sub-pixel in.

8. touch-control display panel as claimed in claim 7, which is characterized in that the multiple second common electrode with it is the multiple Between first common electrode and it is not connected with.

9. touch-control display panel as claimed in claim 7, which is characterized in that the third area includes multiple third subregions, should Firstth area includes multiple first subregions, and the multiple third subregion and the multiple first subregion are along the one of secondth area Extending direction is alternately arranged between secondth area and the driving circuit.

10. touch-control display panel as claimed in claim 9, which is characterized in that the multiple first subregion with it is the multiple The range that the area summation of third subregion accounts for the area of the visible area is 4/1sts to five/5th.

11. touch-control display panel as claimed in claim 9, which is characterized in that respectively the third subregion is by the multiple touch-control Sensor pad is surround.

12. touch-control display panel as claimed in claim 9, which is characterized in that respectively the third subregion and respectively first sub-district The width in domain is 1:3 to 1:6 than range.

13. touch-control display panel as claimed in claim 7, which is characterized in that the multiple first common electrode and described more A second common electrode is same patterned conductive layer.

14. a kind of touch-control display panel characterized by comprising

One substrate wherein has a visible area on the substrate, and the visible area includes one first area, one second area and a third Area；

One drive circuit is set to the side on the substrate and being located at outside the visible area, and firstth area is located at the third area Between secondth area and the driving circuit；And

One touch-control array of display is set on the substrate and is located in the visible area, which includes:

Multi-strip scanning line and multiple data lines, it is interlaced with each other to define multiple sub-pixels；

Multiple first common electrodes are respectively arranged in the multiple sub-pixel in firstth area and secondth area, wherein The multiple first common electrode interconnects and forms multiple touch-control sensing pads, and the multiple touch-control sensing pad is with array side Formula arrangement；

Multiple second common electrodes are respectively arranged in the multiple sub-pixel in the third area；And

A plurality of conducting wire, be respectively arranged at the substrate and the multiple first common electrode and the multiple second common electrode it Between, wherein respectively the conducting wire and at least one touch-control sensing pad are electrically connected；

Wherein firstth area includes multiple first subregions, which includes multiple third subregions, the multiple first son Region and an extending direction of the multiple third subregion along secondth area are alternately arranged in secondth area and the driving circuit Between；

First common electrode and second common electrode are not connected each other.

15. touch-control display panel as claimed in claim 14, which is characterized in that the multiple first subregion with it is the multiple The range that the area summation of third subregion accounts for the area of the visible area is 4/1sts to five/5th.

16. touch-control display panel as claimed in claim 14, which is characterized in that respectively the third subregion is by the multiple touch-control Sensor pad is surround.

17. touch-control display panel as claimed in claim 14, which is characterized in that respectively the third subregion and respectively first sub-district The width in domain is 1:3 to 1:6 than range.

18. touch-control display panel as claimed in claim 14, which is characterized in that the multiple first common electrode and described more A second common electrode is same patterned conductive layer.

19. touch-control display panel as claimed in claim 18, which is characterized in that the touch-control array of display further includes multiple pixels Electrode is respectively arranged in the multiple sub-pixel of the visible area, and the multiple pixel electrode is set to the multiple first Between common electrode and the multiple second common electrode and the substrate.

20. touch-control display panel as claimed in claim 18, which is characterized in that the touch-control array of display further includes multiple pixels Electrode is respectively arranged in the multiple sub-pixel in the visible area, the multiple first common electrode and the multiple Second common electrode is set between the multiple pixel electrode and the substrate.