TWI669645B - Touch display panel - Google Patents

Abstract

A touch display panel includes a substrate, a plurality of active components, a first insulating layer, a pixel electrode layer, a common electrode layer, and a patterned conductive layer. The substrate has a display area and a peripheral area surrounding the display area. A plurality of active components are disposed on the substrate. The first insulating layer is disposed on the substrate and covers the plurality of active components. The pixel electrode layer and the common electrode layer are disposed on the first insulating layer. The pixel electrode layer is electrically connected to the plurality of active elements, and the pixel electrode layer is electrically insulated from the common electrode layer. The patterned conductive layer is disposed on the first insulating layer and located in the peripheral region. The patterned conductive layer is electrically connected to the common electrode layer, and includes a plurality of touch electrodes and a plurality of patterned electrodes. Each touch electrode is connected to a corresponding patterned electrode.

Description

Touch display panel

The present invention relates to a semiconductor device, and more particularly to a touch display panel.

As the resolution and the size of the panel increase, the distance between the components in the touch display panel needs to be shortened. The in-cell touch display panel is taken as an example, because the touch sensing layer and the signal are routed. There is an insulating layer between them. Therefore, the parasitic capacitance in the touch display panel will increase, causing problems such as signal attenuation or signal delay, resulting in an error in output or reading. In addition, the increase in resolution also causes the number of traces disposed in the peripheral area to be increased, so that the space provided at the output end of the peripheral area is limited.

The present invention provides a touch display panel that can reduce parasitic capacitance and reduce an area for setting an output end.

A touch display panel according to at least one embodiment of the present invention includes a substrate, a plurality of active elements, a first insulating layer, a pixel electrode layer, a common electrode layer, and a patterned conductive layer. The substrate has a display area and a peripheral area surrounding the display area. A plurality of active components are disposed on the substrate. The first insulating layer is disposed on the substrate and covers the plurality of active components. The pixel electrode layer and the common electrode layer are disposed on the first insulating layer. The pixel electrode layer is electrically connected to the plurality of active elements, and the pixel electrode layer is electrically insulated from the common electrode layer. The patterned conductive layer is disposed on the first insulating layer and located in the peripheral region. The patterned conductive layer is electrically connected to the common electrode layer, and includes a plurality of touch electrodes and a plurality of patterned electrodes. Each touch electrode is connected to a corresponding patterned electrode.

Based on the above, the present invention does not have any insulating layer between the patterned conductive layer and the common electrode layer, so there is no parasitic capacitance between the patterned conductive layer and the common electrode layer, thereby improving the touch display panel. The quality of the signal transmission. Moreover, the touch electrode and the patterned electrode are disposed in the peripheral area, thereby reducing the area occupied by the output end, so as to improve the area of the display area of the touch display panel or reduce the area of the peripheral area of the touch display panel.

The above described features and advantages of the invention will be apparent from the following description.

The invention will be more fully described below with reference to the drawings of the embodiments. However, the invention may be embodied in a variety of different forms and should not be limited to the embodiments described herein. The thickness of layers and regions in the drawings will be exaggerated for clarity. The same or similar reference numbers indicate the same or similar elements, and the following paragraphs will not be repeated. In addition, the directional terms mentioned in the embodiments, for example, up, down, left, right, front or back, etc., are only directions referring to the additional drawings. Therefore, the directional terminology used is for the purpose of illustration and not limitation.

FIG. 1A is a top view of a touch display panel according to an embodiment of the invention. FIG. 1B is a cross-sectional view of a touch display panel according to an embodiment of FIG. 1A. 1C is a cross-sectional view of a touch display panel according to another embodiment of FIG. 1A. It should be noted that both Fig. 1B and Fig. 1C correspond to the cross-sectional lines A1-A1' and B1-B1' of Fig. 1A.

Referring to FIG. 1A , FIG. 1B and FIG. 1C , in the embodiment, the touch display panel 10 includes a substrate 100 , a plurality of active devices T , a first insulating layer BP1 , a pixel electrode layer PE , a common electrode layer CE , and The conductive layer 110 is patterned.

In the present embodiment, the substrate 100 may include a hard substrate or a flexible substrate. The material of the substrate 100 is, for example, glass, plastic, or other suitable materials, or a combination thereof, but the invention is not limited thereto. In the present embodiment, the substrate 100 has a display area 102 and a peripheral area 104 surrounding the display area 102.

In the present embodiment, a plurality of active devices T are disposed on the substrate 100. In detail, a plurality of active elements T are disposed, for example, in the display area 102 of the substrate 100. Each of the active elements T has, for example, a gate G, a source S, a semiconductor layer SE, and a drain D. In some embodiments, the touch display panel 10 may further include a plurality of signal lines (not shown) disposed on the substrate 100. The plurality of signal lines include, for example, a plurality of scanning lines (not shown), a plurality of data lines (not shown), or other suitable lines. One of the plurality of scan lines may be electrically connected to the corresponding gate G, and one of the plurality of data lines may be electrically connected to the corresponding source S, and the source S and the drain D are respectively The semiconductor layer SE is electrically connected. In this embodiment, the material of the active device T may include, but is not limited to, a metal, an alloy, a nitride of a metal material, an oxide of a metal material, an oxynitride of a metal material, a transparent conductive material, and other non-metal materials. A material with conductive properties or other suitable material. The active device T may be a bottom gate type transistor (for example, the gate G is under the semiconductor layer SE), a top gate type transistor (for example, the gate G is above the semiconductor layer SE), and a stereotype transistor (for example, a semiconductor layer) SE is on a different level) or other suitable type of transistor. In some embodiments, a gate insulating layer GI may be disposed between the gate G and the semiconductor layer SE. The material of the gate insulating layer GI may be an inorganic material (for example, yttria, tantalum nitride, ytterbium oxynitride, or a stacked layer of at least two materials described above), an organic material (for example, a polyimide resin, an epoxy resin) Resin or acryl resin) or a combination of the above, but the invention is not limited thereto.

In the present embodiment, the first insulating layer BP1 is located on the substrate 100 and covers a plurality of active devices T. The material of the first insulating layer BP1 may be an inorganic material (for example: yttria, tantalum nitride, ytterbium oxynitride, or a stacked layer of at least two materials described above), an organic material (for example, a polyimide resin, an epoxy) A resin or an acrylic resin or a combination thereof, but the invention is not limited thereto. The first insulating layer BP1 may be a single layer structure or a multilayer structure. For example, the first insulating layer BP1 may be a multi-layered structure composed of a stack of yttrium oxide and tantalum nitride, but is not limited thereto.

In the present embodiment, the pixel electrode layer PE is disposed on the first insulating layer BP1. From another perspective, the pixel electrode layer PE is disposed in the display area 102 of the substrate 100. The pixel electrode layer PE is electrically connected, for example, to the active device T. In detail, the pixel electrode layer PE is electrically connected to the drain D of the active device T, for example. In the present embodiment, the pixel electrode layer PE can be electrically connected to the drain D of the active device T, for example, through the opening H1. The material of the pixel electrode layer PE may include a transparent conductive material or an opaque conductive material. The transparent conductive material may include, but is not limited to: a metal oxide conductive material such as indium tin oxide, indium zinc oxide, aluminum tin oxide, aluminum zinc oxide, indium antimony zinc oxide, other suitable An oxide, or a stacked layer of at least two of the foregoing. The opaque conductive material can include, but is not limited to: a metal.

In the present embodiment, the common electrode layer CE is provided on the first insulating layer BP1. The material of the common electrode layer CE may include a transparent conductive material or an opaque conductive material. The transparent conductive material may include, but is not limited to: a metal oxide conductive material such as indium tin oxide, indium zinc oxide, aluminum tin oxide, aluminum zinc oxide, indium antimony zinc oxide, other suitable An oxide, or a stacked layer of at least two of the foregoing. The opaque conductive material can include, but is not limited to: a metal. In some embodiments, the touch display panel 10 may further include a second insulating layer BP2 disposed between the common electrode layer CE and the pixel electrode layer PE to electrically insulate the common electrode layer CE from the pixel electrode layer PE. . In the embodiment illustrated in FIG. 1B , the common electrode layer CE is disposed between the pixel electrode layer PE and the substrate 100 , for example, but is not limited thereto. In the embodiment illustrated in FIG. 1C , the pixel electrode layer PE is disposed between the common electrode layer CE and the substrate 100 , for example. In the embodiment, the common electrode layer CE can serve as the touch sensing layer of the touch display panel 10 .

In the embodiment, the patterned conductive layer 110 is disposed on the first insulating layer BP1. In detail, the patterned conductive layer 110 is disposed in the peripheral region 104 of the substrate 100. The material of the patterned conductive layer 110 may include a transparent conductive material or an opaque conductive material. The transparent conductive material may include, but is not limited to: a metal oxide conductive material such as indium tin oxide, indium zinc oxide, aluminum tin oxide, aluminum zinc oxide, indium antimony zinc oxide, other suitable An oxide, or a stacked layer of at least two of the foregoing. The opaque conductive material can include, but is not limited to: a metal. The patterned conductive layer 110 is electrically connected, for example, to the common electrode layer CE. In the present embodiment, the patterned conductive layer 110 is in contact with the common electrode layer CE, that is, there is no insulating layer between the patterned conductive layer 110 and the common electrode layer CE, so the patterned conductive layer 110 and the common electrode layer are patterned. There is no parasitic capacitance between CEs. In addition, in the present embodiment, the material of the patterned conductive layer 110 is a metal having a low impedance value, and thus has a good signal transmission quality. In the embodiment, the patterned conductive layer 110 includes a plurality of patterned electrodes 112 and a plurality of touch electrodes 114. The shape of the plurality of patterned electrodes 112 may be, for example, an L-shape, an N-shape, a zigzag shape, a lightning bolt shape, an I-shape, a line segment shape, a triangle shape, a quadrangle shape, a polygonal shape, or a combination of the above shapes, and the plurality of patterned electrodes 112 are mutually The rooms may not be connected together and are independent. In some embodiments, the common electrode layer CE may further include a plurality of openings TR disposed in the peripheral region 104, and the plurality of openings TR are disposed between the patterned electrodes 112 and are, for example, elongated. The plurality of touch electrodes 114 are electrically connected to a portion of the patterned electrodes 112. The plurality of touch electrodes 114 are disposed on the peripheral region 104 of the touch display panel 10 . The number of the plurality of touch electrodes 114 is n, and n≥4. In this embodiment, since the plurality of touch electrodes 114 are disposed at the corners of the peripheral area 104 of the touch display panel 10, the number of the plurality of touch electrodes 114 is four (n=4), that is, the present The touch display panel 10 of the embodiment has four touch electrodes 114a, 114b, 114c, and 114d. However, it is not limited thereto, and the number of touch electrodes may also be greater than 4. The shape of the plurality of touch electrodes 114 may be, for example, a triangle, an L shape, a rectangle, or a combination of the above shapes. In the embodiment, the shape of the plurality of touch electrodes 114 is a triangle. In some embodiments, the plurality of patterned electrodes 112 can serve as a signal transmission line. That is, the patterned electrode 112, which is used for the signal transmission line, can be electrically connected to the corresponding plurality of touch electrodes 114 and an external driving circuit (not shown) or a driving chip (not shown). In detail, the patterned electrode 112, which is the use of the signal transmission line, may extend from the touch electrode 114 to the output terminal O at the edge of the substrate 100, for example. That is, the number of output terminals O corresponds to, for example, the number of touch electrodes 114. In the present embodiment, since the touch display panel 10 has four touch electrodes 114a, 114b, 114c, and 114d, it has four output terminals O1, O2, O3, and O4. Based on this, the plurality of touch electrodes 114 can be electrically connected to an external driving circuit or a driving chip by using the patterned electrode 112 as a signal transmission line.

The plurality of patterned electrodes 112 disposed in the peripheral region 104 may form a uniform impedance distribution around the common electrode layer CE in the display region 102. When the user touches the touch display panel 100, the electric charge in the common electrode layer CE is redistributed due to the capacitance generated by the touch action, thereby generating an induced current. At this time, the touch display panel 100 can determine the touch position by the induced current received by the touch electrode 114. That is, the touch display panel 100 of the present embodiment is, for example, a surface capacitive touch display panel.

In some embodiments, the touch display panel 10 may further include a flat layer PL disposed on the first insulating layer BP1. In detail, the flat layer PL may be formed, for example, before the formation of the pixel electrode layer PE, the common electrode layer CE, and the patterned conductive layer 110. The material of the flat layer PL may be an inorganic material (for example, yttria, tantalum nitride, ytterbium oxynitride, or a stacked layer of at least two materials described above), an organic material (for example, a polyimide resin, an epoxy resin) Or an acrylic resin or a combination thereof, but the invention is not limited thereto. The flat layer PL may be a single layer structure, but the present invention is not limited thereto. In other embodiments, the planar layer PL may also be a multilayer structure. The flat layer PL can provide better flatness for the formation of the subsequent pixel electrode layer PE, the common electrode layer CE or the patterned conductive layer 110.

In the present embodiment, since there is no insulating layer between the patterned conductive layer 110 and the common electrode layer CE, there is no parasitic capacitance between the patterned conductive layer 110 and the common electrode layer CE, thereby improving the touch. The quality of the signal transmission of the display panel 10 is controlled. In addition, the touch electrodes 114 and the patterned electrodes 112 may be disposed in the peripheral region 104, such as the four touch electrodes 114 in the above embodiment, thereby reducing the area occupied by the output terminals O1, O2, O3, and O4. The area of the display area 102 of the touch display panel 10 is increased or the area of the peripheral area 104 of the touch display panel 10 is reduced.

2A is a top view of a touch display panel according to another embodiment of the present invention, and FIG. 2B is a cross-sectional view of the touch display panel according to an embodiment of FIG. 2A. It should be noted that the embodiment of FIG. 2A and FIG. 2B respectively use the same reference numerals and parts of the embodiment of FIG. 1A and FIG. 1B, wherein the same or similar reference numerals are used to denote the same or similar elements, and the description is omitted. The description of the same technical contents and their functions will not be repeated in the following embodiments.

Referring to FIG. 1A, FIG. 1B, FIG. 2A and FIG. 2B, the main difference between the touch display panel 20 of the present embodiment and the touch display panel 10 of the foregoing embodiment is that the patterned conductive layer 110 and the common electrode layer CE are The same conductive layer.

In the present embodiment, the patterned conductive layer 110 and the common electrode layer CE are the same conductive layer. That is, the patterned conductive layer 110 and the common electrode layer CE are fabricated by using the same lithography process. Therefore, the present embodiment can effectively reduce the manufacturing cost of the touch display panel.

FIG. 3 is a schematic top view of a touch display panel according to still another embodiment of the present invention. It should be noted that the embodiment of FIG. 3 follows the component numbers and parts of the embodiment of FIG. 1A, wherein the same or similar elements are used to denote the same or similar elements, and the same technical contents and their functions are omitted. It is to be noted that the following embodiments will not be repeated.

Referring to FIG. 3 , the main difference between the touch display panel 30 of the present embodiment and the touch display panel 10 of the foregoing embodiment is that the patterned conductive layer 110 and the common electrode layer CE are the same conductive layer, and the plurality of openings TR A uniform distribution is formed around the common electrode layer CE. In detail, the plurality of openings TR may be, for example, an L-shape, an N-shape, a zigzag shape, a lightning bolt shape, an I-shape, a line segment shape, a triangle shape, a quadrangle shape, a polygonal shape, or a combination of the above shapes.

In the present embodiment, the patterned conductive layer 110 and the common electrode layer CE are the same conductive layer. That is, the patterned conductive layer 110 and the common electrode layer CE are fabricated by using the same lithography process, so that at least one lithography process can be reduced, so the present embodiment can effectively reduce the touch display panel. Manufacturing costs.

In summary, the present invention does not have any insulating layer between the patterned conductive layer and the common electrode layer, so there is no parasitic capacitance between the patterned conductive layer and the common electrode layer, thereby improving the touch display. The quality of the signal transmission of the panel. Moreover, the touch electrode and the patterned electrode are disposed in the peripheral area as needed, and the area occupied by the output end is reduced, so as to improve the area of the display area of the touch display panel or reduce the area of the peripheral area of the touch display panel.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention, and any one of ordinary skill in the art can make some changes and refinements without departing from the spirit and scope of the present invention. The scope of the invention is defined by the scope of the appended claims.

10, 20, 30‧‧‧ touch display panel

100‧‧‧Substrate

102‧‧‧ display area

104‧‧‧The surrounding area

110‧‧‧ patterned conductive layer

112‧‧‧patterned electrodes

114, 114a, 114b, 114c, 114d‧‧‧ touch electrodes

A1-A1', A2-A2', B1-B1', B2-B2'‧‧‧

BP1‧‧‧first insulation

BP2‧‧‧Second insulation

CE‧‧‧ common electrode layer

D‧‧‧汲

G‧‧‧ gate

GI‧‧‧ brake insulation

H1‧‧‧ openings

O, O1, O2, O3, O4‧‧‧ output

PE‧‧‧ pixel electrode layer

PL‧‧‧flat layer

S‧‧‧ source

SE‧‧‧Semiconductor layer

T‧‧‧ active components

TR‧‧‧ openings

FIG. 1A is a top view of a touch display panel according to an embodiment of the invention. FIG. 1B is a cross-sectional view of a touch display panel according to an embodiment of FIG. 1A. 1C is a cross-sectional view of a touch display panel according to another embodiment of FIG. 1A. 2A is a top view of a touch display panel according to another embodiment of the present invention. 2B is a cross-sectional view of the touch display panel according to an embodiment of FIG. 2A. FIG. 3 is a schematic top view of a touch display panel according to still another embodiment of the present invention.

Claims (10)

A touch display panel having a display area and a peripheral area surrounding the display area, comprising: a substrate; a plurality of active components disposed on the substrate; a first insulating layer disposed on the substrate and covering the An active element; a pixel electrode layer and a common electrode layer are disposed on the first insulating layer, wherein the pixel electrode layer is electrically connected to the active elements, and the pixel electrode layer and the common electrode layer are electrically connected And a patterned conductive layer disposed on the first insulating layer and located in the peripheral region, wherein the patterned conductive layer is electrically connected to the common electrode layer, and the patterned conductive layer comprises a plurality of touch electrodes And a plurality of patterned electrodes, wherein each of the touch electrodes is connected to the corresponding patterned electrode. The touch display panel of claim 1, wherein the common electrode layer and the patterned conductive layer are the same conductive layer. The touch display panel of claim 2, wherein the common electrode layer and the material of the patterned conductive layer comprise a transparent conductive oxide. The touch display panel of claim 1, wherein the material of the patterned conductive layer comprises a metal. The touch display panel of claim 1, further comprising a second insulating layer disposed between the pixel electrode layer and the common electrode layer. The touch display panel of claim 1, wherein the pixel electrode layer is disposed between the common electrode layer and the substrate. The touch display panel of claim 1, wherein the common electrode layer is disposed between the pixel electrode layer and the substrate. The touch display panel of claim 1, wherein the number of the touch electrodes is n, and n≥4. The touch display panel of claim 1, wherein each of the patterned electrodes comprises an output end adjacent to an edge of the substrate. The touch display panel of claim 1, wherein the touch electrodes are disposed at corners of the touch display panel.