TWI771879B - Touch display panel - Google Patents

Abstract

A touch display panel includes a substrate, a plurality of touch electrodes, an insulating layer, a plurality of control components, a plurality of light emitting components, and a plurality of touch signal transmission parts. The touch electrodes are located between the insulating layer and the substrate. Both the control components and the light emitting components are disposed on the insulating layer. The substrate has a plurality of sub-pixel regions. Each touch electrode includes a plurality of light shielding subparts electrically connected to each other, where each light shielding subpart is arranged in at least one sub-pixel region. At least one control component is disposed in each sub-pixel region, and the touch electrode covers the control component. The light emitting components are electrically connected to the control components and do not overlap with the touch electrodes. At least one light emitting component is disposed in each sub-pixel region. The touch signal transmission parts are electrically connected to the touch electrodes respectively.

Description

touch display panel

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

The current light-emitting diode (Light Emitting Diode, LED) display with touch function is usually an out-cell touch display, which includes a touch panel and a light-emitting diode display panel (LED display panel). The touch panel and the light emitting diode display panel are generally combined with each other through a glue material. Therefore, the plurality of touch electrodes of the touch panel are usually disposed outside the light emitting diode display panel, and are not disposed inside the light emitting diode display panel.

At least one embodiment of the present invention provides a touch display panel with a plurality of touch electrodes disposed therein to provide a touch sensing function.

The touch display panel provided by at least one embodiment of the present invention includes a substrate, a plurality of first touch electrodes, an insulating layer, a plurality of control elements, a plurality of light emitting elements, and a plurality of touch signal transmission parts. The substrate has a surface and a plurality of sub-pixel regions located on the surface, wherein the sub-pixel regions are arranged in an array. The first touch electrodes are disposed on the substrate, and each of the first touch electrodes includes a plurality of shielding subsections that are electrically connected to each other, wherein each shielding subsection is distributed in at least one sub-pixel area. The insulating layer is disposed on the first touch electrodes, wherein the first touch electrodes are located between the insulating layer and the substrate. The control elements are disposed on the insulating layer, at least one of the control elements is disposed in each sub-pixel region, and the first touch electrodes overlap with the control elements. The light-emitting elements are disposed on the insulating layer and are electrically connected to the control elements, wherein the first touch electrodes do not overlap with the light-emitting elements, and at least one light-emitting element is disposed in each sub-pixel region. The touch signal transmission parts are respectively electrically connected to the first touch electrodes.

In at least one embodiment of the present invention, the shielding sub-portions of the same first touch electrode are arranged periodically corresponding to the sub-pixel regions.

In at least one embodiment of the present invention, each light-emitting element is adapted to emit light toward the substrate.

In at least one embodiment of the present invention, the above-mentioned touch display panel further includes at least one touch processing element. The touch processing element is disposed on the insulating layer, wherein the touch signal transmission parts pass through the insulating layer, and the touch processing element is electrically connected to the touch signal transmission parts, and is electrically connected to the touch signal transmission parts through the touch signal transmission parts the first touch electrode.

In at least one embodiment of the present invention, the first touch electrodes are separated from each other and are not directly electrically connected to each other.

In at least one embodiment of the present invention, the shielding sub-portions of the same first touch electrode are connected to each other, and each of the first touch electrodes is distributed in a plurality of sub-pixel regions adjacent to each other and arranged in an array.

In at least one embodiment of the present invention, the first touch electrodes extend along the first direction, and the shielding sub-portions of the same first touch electrode are arranged along the first direction. The touch display panel further includes a plurality of second touch electrodes. The second touch electrodes are located on the control elements and the insulating layer and extend along the second direction, wherein the first touch electrodes are interlaced with the second touch electrodes, and the first touch electrodes and the first touch electrodes are interlaced with the second touch electrodes. The two touch electrodes are not electrically connected to each other.

In at least one embodiment of the present invention, the second touch electrodes are respectively electrically connected to the light-emitting elements, and each of the second touch electrodes is electrically connected to at least two light-emitting elements.

In at least one embodiment of the present invention, each of the first touch electrodes includes a plurality of touch connection lines. The touch connection lines extend along the first direction, wherein each touch connection line connects two adjacent shielding sub-sections.

In at least one embodiment of the present invention, each of the second touch electrodes is distributed in a plurality of sub-pixel regions arranged in at least one row along the second direction, and the second touch electrodes respectively span the touch connection lines .

In at least one embodiment of the present invention, the shielding sub-sections are respectively located in the sub-pixel regions, and each of the second touch electrodes has at least one first opening and at least one second opening. The light-emitting elements are respectively located in the first openings of the second touch electrodes, and the shielding subsections are respectively located in the second openings of the second touch electrodes.

In at least one embodiment of the present invention, at least two control elements are disposed in each sub-pixel area.

In at least one embodiment of the present invention, each shielding subsection includes a plurality of shielding layers, wherein the shielding layers are electrically connected to each other and respectively overlap with the control elements.

In at least one embodiment of the present invention, the light shielding layers of each shielding subsection are arranged in an array.

In at least one embodiment of the present invention, the at least one shielding subsection includes a first extending strip and two second extending strips. The first extension bars extend along the first direction, wherein the first extension bars of two adjacent shielding subsections are connected to each other. The second extension bars extend along the second direction, and one of the first extension bars is located between two adjacent second extension bars and connects the two adjacent second extension bars.

In at least one embodiment of the present invention, any one of each of the first extension strips and each of the second extension strips further extends along the edge of each sub-pixel region.

In at least one embodiment of the present invention, each of the second touch electrodes includes a plurality of electrode subsections. The electrode subsections are arranged along the second direction, wherein each electrode subsection is distributed in at least one sub-pixel area and does not overlap with any shielding subsection.

In at least one embodiment of the present invention, each electrode sub-portion is distributed in a plurality of sub-pixel regions.

In at least one embodiment of the present invention, each of the second touch electrodes further includes a plurality of touch connection lines, wherein each of the touch connection lines is connected to two adjacent electrode subsections and spans one of the first touch electrodes.

In at least one embodiment of the present invention, each electrode subsection includes a first electrode strip and two second electrode strips, wherein one first electrode strip is located between two adjacent second electrode strips and connects two adjacent second electrode strips second electrode strip. Each of the first electrode strips and each of the second electrode strips have different extending directions.

Based on the above, with the above-mentioned first touch electrodes, the touch display panel of at least one embodiment of the present invention can provide a touch sensing function, so that the user can operate the touch display panel in a touch manner. Since the first touch electrodes are located between the insulating layer and the substrate, in at least one embodiment of the present invention, the touch electrodes (ie, the first touch electrodes) are located inside the touch display panel. Compared with the existing plug-in type touch display, the above-mentioned touch display panel is beneficial to reduce the thickness of electronic devices such as mobile phones and tablet computers, so as to meet the current development trend of thinning.

In the following text, the dimensions (such as length, width, thickness and depth) of elements (such as layers, films, substrates and regions, etc.) in the drawings are exaggerated in unequal proportions in order to clearly present the technical features of the present application. . Therefore, the descriptions and explanations of the following embodiments are not limited to the dimensions and shapes of the elements in the drawings, but should cover the dimensions, shapes and deviations caused by actual manufacturing processes and/or tolerances. For example, the flat surfaces shown in the figures may have rough and/or non-linear features, while the acute angles shown in the figures may be rounded. Therefore, the elements shown in the drawings in this application are mainly for illustration, and are not intended to accurately depict the actual shapes of the elements, nor are they intended to limit the scope of the patent application of this application.

Secondly, words such as "about", "approximately" or "substantially" appearing in the content of this case not only cover the clearly stated numerical value and numerical value range, but also cover the understanding of those with ordinary knowledge in the technical field to which the invention belongs. The allowable deviation range of , wherein the deviation range can be determined by the error generated during measurement, for example, the error is caused by the limitations of both the measurement system or the process conditions. For example, two objects (such as planes or traces of a substrate) are "substantially parallel" or "substantially perpendicular", where "substantially parallel" and "substantially perpendicular" represent the parallel and perpendicular relationship between the two objects, respectively It can include non-parallel and non-perpendicular caused by the tolerance range.

Further, "about" can mean within one or more standard deviations of the above-mentioned numerical value, eg, within ±30%, ±20%, ±10%, or ±5%. Words such as "about", "approximately" or "substantially" appearing in this text may be used to select acceptable ranges or standard deviations based on optical properties, etching properties, mechanical properties or other properties, not a single Standard deviation to apply all of the above optical, etch, mechanical and other properties.

FIG. 1A is a schematic cross-sectional view of a touch display panel according to at least one embodiment of the present invention. Referring to FIG. 1A , the touch display panel 100 includes a substrate 190 and a plurality of first touch electrodes 110 , wherein the first touch electrodes 110 are disposed on the substrate 190 . Taking FIG. 1A as an example, the substrate 190 has a surface 191 , wherein the surface 191 can be the upper surface of the substrate 190 , and the first touch electrodes 110 are disposed on the surface 191 .

The substrate 190 can be a transparent substrate, which can be a glass plate or a transparent plastic plate, wherein the transparent plastic plate can be a rigid substrate or a flexible substrate. Therefore, the touch display panel 100 may be a flexible display panel or a rigid display panel. The first touch electrodes 110 may all be metal layers, so the first touch electrodes 110 are not opaque and can block light. In addition, the first touch electrodes 110 can be formed by lithography and etching.

The touch display panel 100 further includes an insulating layer 181 disposed on the first touch electrodes 110 and the substrate 190 , wherein the insulating layer 181 can cover the first touch electrodes 110 and the surface 191 , as shown in FIG. 1A . Therefore, the first touch electrodes 110 are located between the insulating layer 181 and the substrate 190 . The touch display panel 100 further includes a plurality of control elements 170 , wherein the control elements 170 are disposed on the insulating layer 181 and overlap with the first touch electrodes 110 .

In detail, both the control element 170 and the first touch electrodes 110 can form overlapping projection areas on the surface 191 along a direction parallel to the normal N1 of the surface 191 , wherein the projection area of the control element 170 on the surface 191 It will completely fall within the projection area of the first touch electrodes 110 on the surface 191 . Therefore, when viewing the touch display panel 100 from the surface 192 of the substrate 190 , it can be found that the first touch electrodes 110 completely cover the control elements 170 . In addition, the surface 192 is opposite to the surface 191, wherein the surfaces 191 and 192 may be the upper surface and the lower surface of the substrate 190, respectively.

The touch display panel 100 further includes a plurality of light-emitting elements 130 (only one light-emitting element 130 is shown in FIG. 1A ), wherein the light-emitting elements 130 are disposed on the insulating layer 181 and may be light-emitting diodes, such as miniature light-emitting diodes (micro LED) or sub-millimeter light-emitting diodes (mini LED). Each light-emitting element 130 may include a plurality of electrodes 131 , 132 and a host layer 133 , wherein the host layer 133 may be a multi-layer film, and includes a light-emitting layer (not shown) and at least two semiconductor layers (not shown).

The electrodes 131 and 132 are both disposed on the main body layer 133 and located on the same side of the main body layer 133 , wherein the electrodes 131 and 132 can be anodes and cathodes. Therefore, the light emitting element 130 may be a lateral LED. In the embodiment shown in FIG. 1A, electrode 131 may be an anode, and electrode 132 may be a cathode. However, in other embodiments, the electrode 131 may be a cathode, and the electrode 132 may be an anode. Therefore, electrode 131 is not limited to being an anode, and electrode 132 is not limited to being a cathode.

In addition, in the embodiment shown in FIG. 1A , the light emitting element 130 is a horizontal light emitting diode, but in other embodiments, the light emitting element 130 can also be a vertical light emitting diode (vertical LED). In other words, the electrodes 131 and 132 may be located on opposite sides of the body layer 133, respectively. Therefore, the light-emitting element 130 shown in FIG. 1A is for illustration only, and the light-emitting element 130 is not limited to be a horizontal light-emitting diode.

In addition to the insulating layer 181 , the touch display panel 100 may further include multiple insulating layers 182 , 183 , protective layers 184 , 185 , 186 and 187 , wherein the insulating layers 182 , 183 and the protective layers 184 , 185 , 186 and 187 are stacked in sequence. on the substrate 190 . That is, the insulating layer 182 is provided on the insulating layer 181 , and the insulating layer 183 is provided on the insulating layer 182 . The protective layer 184 is provided on the insulating layer 183 , and the protective layer 185 is provided on the protective layer 184 . The protective layer 186 is disposed on the protective layer 185, and the protective layer 187 is disposed on the protective layer 186, as shown in FIG. 1A.

The light-emitting elements 130 are disposed on the insulating layer 181 , and in this embodiment, the light-emitting elements 130 are located above the insulating layer 181 and the control element 170 . The light-emitting elements 130 can be located on the protective layer 184, and the light-emitting elements 130 and the protective layer 185 can be located on the same surface of the protective layer 184, wherein the light-emitting elements 130 and the protective layer 185 can be sandwiched between the protective layer 184 and the protective layer 184. between layers 186 . In addition, in this embodiment, the protective layer 185 may be a pixel definition layer, which may have a plurality of openings (not shown), and the light-emitting element 130 may be located in the above-mentioned openings.

These control elements 170 are disposed on the insulating layer 181 , and may be disposed between the protective layer 184 and the insulating layer 181 , wherein a part of each control element 170 is disposed in the insulating layers 182 and 183 . Each control element 170 may be a thin film transistor (Thin Film Transistor, TFT), and includes a gate electrode G17, a source electrode S17, a drain electrode D17 and a semiconductor layer, wherein the semiconductor layer has a channel layer C17 and at least two doping parts R17, And the gate electrode G17 overlaps with the channel layer C17.

In the embodiment shown in FIG. 1A , the control element 170 may be a top-gate transistor, in which the semiconductor layer (including the channel layer C17 ) is located on the insulating layer 181 , and the gate G17 is connected to the insulating layer 182 All are located on the insulating layer 181 . In the same control element 170, the gate electrode G17 is located on the insulating layer 182, so that the insulating layer 182 can be located between the gate electrode G17 and the channel layer C17. In this way, the insulating layer 182 can serve as a gate insulating layer, and the gate G17 , the insulating layer 182 and the channel layer C17 which are stacked and overlapped with each other can form a capacitor.

Since the control elements 170 overlap with the first touch electrodes 110 , when external light enters the touch display panel 100 from the surface 192 , the first touch electrodes 110 can block the external light from entering the channel layer of the control element 170 . C17, to prevent the channel layer C17 from generating leakage current due to light irradiation, thereby helping the control element 170 to operate normally without being affected by the leakage current.

The insulating layer 183 is disposed on the insulating layer 182 and covers the gate electrodes G17 and the insulating layer 182 . Therefore, these gate electrodes G17 may be sandwiched between the insulating layer 182 and the insulating layer 183 . In addition, in the same control element 170, the doping parts R17 are respectively located on opposite sides of the channel layer C17, and the source electrode S17 and the drain electrode D17 are respectively connected to the doping parts R17, so that the source electrode S17 and the drain electrode D17 The semiconductor layers are electrically connected, wherein the shapes of the source electrode S17 and the drain electrode D17 can be pillars, and the source electrode S17 and the drain electrode D17 can penetrate through the insulating layers 183 and 182 to connect the doping portion R17 .

The connection between the source electrode S17 and the drain electrode D17 and the doping portion R17 can form an ohmic contact, so as to reduce the impedance between the source electrode S17 and the drain electrode D17 and the doping portion R17 . In addition, the insulating layer 183 may be an Interlayer Dielectric Layer (ILD Layer), wherein both the insulating layers 182 and 183 may be made of inorganic insulating materials, such as silicon oxide or silicon nitride.

Specifically, in the embodiment shown in FIG. 1A , the control element 170 is a top-gate transistor, but in other embodiments, the control element 170 may also be a bottom-gate transistor . Accordingly, FIG. 1A is for illustration only, and does not limit the type of control element 170 .

The touch display panel 100 may further include a circuit layer 143 , wherein the circuit layer 143 is disposed on the insulating layer 183 and is electrically connected to the source electrode S17 and the drain electrode D17 of the control elements 170 . The protective layer 184 is disposed on the circuit layer 143, so the circuit layer 143 is located between the insulating layer 183 and the protective layer 184, as shown in FIG. 1A.

Although the source electrode S17 and the drain electrode D17 are both electrically connected to the circuit layer 143, the source electrode S17 and the drain electrode D17 are separated from each other and are not in contact with each other. Secondly, in the same control element 170, when the gate G17 is not supplied with voltage to turn on the control element 170, the channel layer C17 basically electrically insulates the source S17 and the drain D17, so that the source S17 and the drain are electrically insulated. The poles D17 are not electrically connected to each other. It can be seen from this that even though the source S17 and the drain D17 are both electrically connected to the circuit layer 143, the source S17 and the drain D17 still need to pass through the voltage input by the gate G17 to be electrically connected.

The touch display panel 100 may further include a circuit layer 145 and a plurality of conductive pillars 146 , wherein the conductive pillars 146 are connected to the circuit layer 145 . The wiring layer 145 may be disposed on the protective layer 184 and located between the protective layer 184 and the protective layer 185 . The conductive pillars 146 are located in the protective layer 184 and pass through the protective layer 184 to connect the circuit layer 143 . Therefore, the circuit layer 145 can be electrically connected to the circuit layer 143 through the conductive pillars 146 .

The touch display panel 100 may further include a circuit layer 120 and a plurality of conductive pillars 147 , wherein the conductive pillars 147 are connected to the circuit layer 120 . The wiring layer 120 may be disposed on the protection layer 185 , and a portion of the wiring layer 120 may be located between the protection layer 185 and the protection layer 186 . For example, a portion of the wiring layer 120 on the left in FIG. 1A may be sandwiched between the protective layer 185 and the protective layer 186 . The conductive pillars 147 may be located in the protective layer 185 and may penetrate through the protective layer 185 to connect to the circuit layer 145 . Therefore, the circuit layer 120 can be electrically connected to the circuit layer 145 through the conductive pillars 147 .

The circuit layer 120 includes a plurality of electrode layers 121 and 122 (only one electrode layer 121 and one electrode layer 122 are shown in FIG. 1A ), wherein the electrode layers 121 are electrically connected to the electrodes 131 of the light-emitting elements 130 , and the electrode layers 122 are electrically The electrodes 132 of these light-emitting elements 130 are sexually connected. Both the electrode layers 121 and 122 are separated from each other without being in contact. When the electrode layers 121 and 122 are not yet electrically connected to the light-emitting element 130, the electrode layers 121 and 122 are electrically insulated from each other without being electrically connected.

In the embodiment shown in FIG. 1A , each electrode layer 121 is electrically connected to one of the conductive pillars 147 , and is electrically connected to the circuit layer 145 through the conductive pillar 147 . The circuit layer 145 can be electrically connected to the drain electrode D17 through the conductive column 146 and the circuit layer 143 , so the drain electrode D17 can be electrically connected to emit light through the circuit layer 143 , the conductive column 146 , the circuit layer 145 , the conductive column 147 and the electrode layer 121 Electrode 131 of element 130 . In this way, the light-emitting elements 130 can be electrically connected to the control elements 170, so that the control elements 170 can control the light-emitting elements 130 to emit light L1.

Each light emitting element 130 can emit light L1 toward the substrate 190 . Since the first touch electrodes 110 do not overlap with the light emitting element 130 , the first touch electrodes 110 do not completely block the light L1 so that the light L1 can penetrate the protective layer 184 , the insulating layers 181 , 182 , 183 and the substrate 190 , and emerges from surface 192. Therefore, the image generated by the touch display panel 100 is displayed on the surface 192 . In addition, the light emitting elements 130 can emit light L1 of different colors, such as red light, green light and blue light, wherein the light L1 of different colors can form an image displayed on the surface 192 .

In the embodiment shown in FIG. 1A , the touch display panel 100 may further include a circuit layer 141 and a plurality of conductive pillars 142 , wherein the circuit layer 141 is disposed on the insulating layer 182 , and the conductive pillars 142 penetrate through the insulating layers 182 and 181 to The first touch electrodes 110 are electrically connected. The conductive pillars 142 are connected to the circuit layer 141 , so that the conductive pillars 142 can be electrically connected to the circuit layer 141 and the first touch electrodes 110 .

The touch display panel 100 may further include a plurality of conductive pillars 144 (only one is shown in FIG. 1A ), wherein the conductive pillars 144 are disposed in the insulating layer 183 . The conductive pillars 144 penetrate through the insulating layer 183 and are electrically connected to the circuit layer 143 and the circuit layer 141 . In this way, the circuit layer 143 can be electrically connected to the circuit layer 141 through the conductive pillars 144 . The structure and shape of the conductive pillars 144 can be the same or similar to the source electrode S17 and the drain electrode D17, and these conductive pillars 144, the source electrode S17 and the drain electrode D17 can be formed in the same deposition process, wherein the deposition process can be a physical gas Phase deposition (Physical Vapor Deposition, PVD), such as evaporation or sputtering.

In this embodiment, the touch display panel 100 may further include a circuit layer 149 and a plurality of conductive pillars 148 , wherein the circuit layer 149 is disposed on the protective layer 186 , and the protective layer 187 is disposed on the protective layer 186 and the circuit layer 149 . Therefore, the wiring layer 149 may be sandwiched between the protective layers 186 and 187 . The conductive pillars 148 are disposed in the protective layer 186 and are connected to the circuit layer 149 , wherein the conductive pillars 148 penetrate through the protective layer 186 and are electrically connected to the circuit layer 120 . Therefore, the circuit layer 120 can be electrically connected to the circuit layer 149 through the conductive pillars 148 . Also, the protective layer 186 may be an encapsulation layer.

From FIG. 1A , part of the circuit layer 149 , part of the circuit layer 120 , part of the circuit layer 145 , part of the circuit layer 143 , part of the circuit layer 141 , one conductive column 148 , one conductive column 147 , one conductive column 146 located on the left side of FIG. 1A , a conductive column 144 and a conductive column 142 are stacked on each other to form a touch signal transmission part 140 , wherein the touch signal transmission part 140 passes through the insulating layers 181 , 182 and 183 and the protective layers 184 , 185 , 186 and 187 The first touch electrodes 110 are connected, so that the touch signal transmission part 140 can be electrically connected to the first touch electrodes 110 .

The touch display panel 100 may further include at least one touch processing element 161 . Although only one touch processing element 161 is shown in FIG. 1A , in other embodiments, the touch display panel 100 may include a plurality of touch processing elements 161 . Therefore, the number of the first touch electrodes 110 included in the touch display panel 100 is not limited to only one. The touch processing element 161 may be an integrated circuit (Integrated Circuit, IC), and includes at least one chip.

The touch processing element 161 is disposed on the insulating layer 181 . For example, the touch processing element 161 may be disposed on the protective layer 187 and above the insulating layer 181 . The touch processing element 161 is electrically connected to the touch signal transmission part 140 , and is indirectly electrically connected to the first touch electrodes 110 through the touch signal transmission part 140 . Taking FIG. 1A as an example, the protective layer 187 may have at least one through hole (not marked), and a conductive material 153 may be disposed in the through hole, wherein the touch signal transmission portion 140 may be located directly under the conductive material 153 and electrically connected Conductive material 153 .

The touch processing element 161 is electrically connected to the conductive material 153 , so that the touch processing element 161 is electrically connected to the touch signal transmission part 140 through the conductive material 153 . In this way, the touch processing element 161 can input touch signals to the first touch electrodes 110 via the touch signal transmission part 140 , or receive touch signals from the first touch electrodes 110 .

The touch display panel 100 may further include a circuit board 162 and at least one conductive bonding material AC1. The circuit board 162 is disposed on the insulating layer 181 . For example, the circuit board 162 may be disposed on the protective layer 187 over the insulating layer 181 . In FIG. 1A , a through hole (not shown) may be formed directly under the circuit board 162 , and the through hole is formed in the protective layer 187 , wherein a conductive material 154 may be disposed in the through hole, and the conductive material 154 is electrically connected Line layer 149 .

The conductive bonding material AC1 may be sandwiched between the circuit board 162 and the conductive material 154 and electrically connect the circuit board 162 and the conductive material 154 so that the circuit board 162 can be electrically connected through the conductive bonding material AC1 and the conductive material 154 Line layer 149 . The circuit layer 149 can be electrically connected to the circuit layer 120 through the conductive pillars 148 , and the circuit layer 120 can be electrically connected to the source S17 through the conductive pillars 147 , the circuit layer 145 , the conductive pillars 146 and the circuit layer 143 , so that the circuit board 162 The source electrode S17 of the control element 170 can be electrically connected.

The circuit board 162 can be a circuit board assembly, so the circuit board 162 can have at least one electronic component (not shown) mounted thereon, such as a chip with image processing function, to control the light emission Element 130 emits light to generate an image. In addition, the circuit board 162 may be a flexible printed circuit (FPC) or a rigid printed circuit (rigid printed circuit), and the conductive bonding material AC1 may be anisotropic conductive film (ACF) or solder .

It should be noted that, in the embodiment shown in FIG. 1A , the touch display panel 100 includes multilayer wiring layers 141 , 143 , 145 , 120 and 149 , multilayer insulating layers 181 , 182 and 183 , and multilayer protective layers 184 , 185 , 186 and 187. Therefore, the touch display panel 100 in FIG. 1A includes five wiring layers 141 , 143 , 145 , 120 and 149 , three insulating layers 181 , 182 and 183 and four protective layers 184 , 185 , 186 and 187 .

However, in other embodiments, the numbers of circuit layers, insulating layers and protective layers included in the touch display panel 100 may be different from those in FIG. 1A . For example, in other embodiments, the touch display panel 100 may not include the protective layer 187 , so that the touch processing element 161 and the circuit board 162 can be electrically connected to the circuit layer 149 without passing through the conductive materials 153 and 154 . Therefore, the number of circuit layers, insulating layers and protective layers included in the touch display panel 100 is not limited by FIG. 1A .

It is worth mentioning that, in this embodiment, the touch display panel 100 may further include a plurality of transparent layers 151 and a black matrix layer 152 . The transparent layers 151 are disposed on the substrate 190 , and each transparent layer 151 may be located between the surface 191 of the substrate 190 and one of the first touch electrodes 110 . When external light is incident on the touch display panel 100 from the surface 192 , the transparent layers 151 can not only help reduce the reflection of the external light, but also reduce or eliminate the mura generated by the first touch electrodes 110 , thereby improving the image quality of the touch display panel 100 .

The transparent layer 151 may be a conductive layer. For example, the transparent layer 151 can be made of transparent oxide, wherein the transparent oxide is, for example, Indium Tin Oxide (ITO) or Indium Zinc Oxide (IZO). When the transparent layer 151 is a conductive layer, the transparent layer 151 helps to reduce RC-loading, thereby improving the touch function of the touch display panel 100 . In addition, it should be noted that in other embodiments, the transparent layer 151 can also be an insulating layer, and the insulating transparent layer 151 can also reduce or eliminate moiré, so the transparent layer 151 is not limited to be a conductive layer.

The black matrix layer 152 may be disposed on the insulating layer 181 . Taking FIG. 1A as an example, the black matrix layer 152 may be disposed on the insulating layer 183 and above the insulating layer 181 . The black matrix layer 152 may have a plurality of openings 152h (only one is shown in FIG. 1A ), wherein each light-emitting element 130 is located directly above one of the openings 152h , so that the openings 152h are aligned with the light-emitting elements 130 respectively. Therefore, the light L1 emitted by each light emitting element 130 is not completely blocked by the black matrix layer 152 .

FIG. 1B is a schematic top view of the touch display panel in FIG. 1A , wherein FIG. 1B only shows the substrate 190 , the first touch electrodes 110 , the light emitting element 130 , the touch signal transmission part 140 and the control element 170 . Other elements are omitted and not shown in FIG. 1B , so that FIG. 1B can clearly and concisely present the technical features to be described below. In addition, the schematic cross-sectional view shown in FIG. 1A is drawn along the line 1A-1A in FIG. 1B .

Please refer to FIGS. 1A and 1B , the substrate 190 further has a plurality of sub-pixel regions 193 located on the surface 191 , wherein the sub-pixel regions 193 are shown by dotted lines in FIG. 1B , and the one surrounded by dotted lines in FIG. 1B A square represents a sub-pixel area 193 . The sub-pixel regions 193 can be arranged in an array, and the light-emitting elements 130 and the control elements 170 are respectively located in the sub-pixel regions 193 . Taking FIG. 1B as an example, the light-emitting elements 130 can be disposed in the sub-pixel regions 193 one-to-one, and the control elements 170 can also be disposed in the sub-pixel regions 193 one-to-one, so each sub-pixel region 193 A light-emitting element 130 and a control element 170 may be disposed in the pixel region 193 .

It should be noted that, although in this embodiment, each sub-pixel region 193 is provided with one light-emitting element 130 and one control element 170, in other embodiments, each sub-pixel region 193 may also be provided with multiple a plurality of light-emitting elements 130 and a plurality of control elements 170 . Therefore, at least one control element 170 and at least one light-emitting element 130 can be disposed in each sub-pixel region 193 , and FIG. 1B is not used to limit the number of both the light-emitting element 130 and the control element 170 in each sub-pixel region 193 .

The first touch electrodes 110 are separated from each other and are not directly electrically connected to each other. In addition, the touch display panel 100 may be a self-sensing touch display panel, wherein the touch signal transmission parts 140 are electrically connected to the first touch electrodes 110 respectively. Taking FIG. 1A as an example, the touch signal transmission parts 140 may be electrically connected to the first touch electrodes 110 one-to-one.

Each touch signal transmission part 140 is electrically connected to one of the ports (ports) of the touch processing element 161 (shown in FIG. 1A ), so that the touch signal generated by each first touch electrode 110 can pass through the corresponding The touch signal transmission part 140 transmits the touch signal to the touch processing element 161 . The touch processing element 161 individually detects and processes the touch signals generated by each of the first touch electrodes 110, so as to know the position of the object (not shown, such as a finger or a stylus) on the surface 192, thereby The user can operate the touch display panel 100 in a touch manner.

Each of the first touch electrodes 110 may include a plurality of shielding sub-sections 111 that are electrically connected to each other, wherein each of the shielding sub-sections 111 is distributed in at least one sub-pixel region 193 . Taking FIG. 1B as an example, each of the first touch electrodes 110 includes nine shielding sub-sections 111 arranged in a 3×3 matrix and distributed in the nine sub-pixel regions 193 arranged in a 3×3 matrix, wherein the nine sub-pixel regions 193 are arranged in a 3×3 matrix. The shielding sub-sections 111 are connected to each other, and each shielding sub-section 111 is distributed in a sub-pixel area 193 . It can be seen from this that each of the first touch electrodes 110 can be distributed in a plurality of sub-pixel regions 193 .

Since the nine shielding sub-sections 111 of the same first touch electrode 110 are not only arranged in a 3×3 matrix, but also distributed in the nine sub-pixel regions 193 arranged in a 3×3 matrix, the same first touch The shielding sub-sections 111 of the electrode 110 may be arranged periodically corresponding to the sub-pixel regions 193 . In addition, the shielding sub-sections 111 of the same first touch electrode 110 can be connected to each other, so that each first touch electrode 110 is distributed in a plurality of sub-pixel regions 193 adjacent to each other and arranged in an array, for example, as shown in FIG. The nine sub-pixel regions 193 shown in 1B are arranged in a 3x3 matrix.

In addition, the first touch electrodes 110 may be arranged periodically, such as in an array, and each of the first touch electrodes 110 may have a plurality of light outlet openings 110h, wherein the light emitting elements 130 are respectively located in the light outlet openings 110h, that is, the The light-emitting elements 130 are respectively aligned with the light-emitting ports 110h. In this way, the first touch electrodes 110 do not overlap with the light emitting elements 130 , and the light L1 emitted by each light emitting element 130 can be emitted from the corresponding light outlet 110 h so that the image can be displayed on the surface 192 .

2A is a schematic top view of a touch display panel according to another embodiment of the present invention, wherein the touch display panel 200 shown in FIG. 2A is similar to the touch display panel 100 . For example, the cross-sectional structures of the touch display panels 200 and 100 are substantially the same. As shown in FIG. 1A , the touch display panel 200 also includes multilayer circuit layers 141 , 143 , 145 and 149 , and a plurality of touch signal transmission parts 140 . AND 240, multi-layer insulating layers 181, 182 and 183, multi-layer protective layers 184, 185, 186 and 187, multiple light-emitting elements 130, multiple control elements 170, multiple transparent layers 151, black matrix layer 152, touch processing elements 161 and circuit board 162. Therefore, the same features of the touch display panels 200 and 100 are not repeated in principle, nor are they shown, for example, a cross-sectional schematic diagram of the touch display panel 200 is not shown.

The main difference between the touch display panels 200 and 100 is that the touch display panel 200 includes a plurality of first touch electrodes 210 and a plurality of second touch electrodes 220 . Since both the touch display panels 200 and 100 include some identical elements, and the main difference between the two is the first touch electrodes 210 and the second touch electrodes 220 , some elements of the touch display panels 200 are omitted from FIG. 2A . Only the first touch electrodes 210 , the second touch electrodes 220 , the touch signal transmission parts 140 and 240 and the substrate 190 are shown.

Referring to FIG. 2A , different from the aforementioned self-inductive touch display panel 100 , the touch display panel 200 is a mutual inductive touch display panel, wherein the first touch electrodes 210 and 110 are different from each other, and the touch display panel 200 also includes a plurality of second touch electrodes 220 . The first touch electrodes 210 and the second touch electrodes 220 are both disposed on the surface 191 of the substrate 190 (please refer to FIG. 1A ), wherein the second touch electrodes 220 are located above the first touch electrodes 210 .

In this embodiment, the shape of each of the first touch electrodes 210 is a strip shape, and the first touch electrodes 210 can extend along the first direction D1, so that the first touch electrodes 210 can be parallel to each other, The first direction D1 shown in FIG. 2A may be a vertical direction. Each of the first touch electrodes 210 includes a plurality of shielding sub-sections 211, wherein the shielding sub-sections 211 of the same first touch electrode 210 are arranged along the first direction D1, so that each of the first touch electrodes 210 is arranged along the first direction D1. extending in the first direction D1.

At least one shielding sub-section 211 may include one first extending strip V21 and two second extending strips L21. Taking FIG. 2A as an example, each shielding sub-section 211 includes a first extending strip V21 and two second extending strips L21. However, in other embodiments, only one shielding sub-section 211 may include the first extending strip V21 and the two second extending strips L21. In the same shielding sub-section 211, the first extending strips V21 extend along the first direction D1, and the second extending strips L21 extend along the second direction D2, wherein the second direction D2 is different from the first direction D1 . Taking FIG. 2A as an example, the second direction D2 may be substantially perpendicular to the first direction D1, wherein the first direction D1 may be a vertical direction, and the second direction D2 may be a horizontal direction.

One of the first extension bars V21 is located between two adjacent second extension bars L21, and connects the two adjacent second extension bars L21. Since in the embodiment shown in FIG. 2A , the first direction D1 and the second direction D2 are substantially perpendicular, so the first extending strip V21 and the second extending strip L21 may be substantially perpendicular to each other, so that the The shape can be a cross. In addition, the first extending strips V21 of two adjacent shielding sub-sections 211 can be connected to each other, so that the shielding sub-sections 111 of the same first touch electrode 210 can be connected to each other and thus electrically connected to each other.

The touch signal transmission parts 140 and 240 are respectively electrically connected to the first touch electrodes 210 and the second touch electrodes 220 . The touch signal transmission parts 140 can be electrically connected to the first touch electrodes 210 one-to-one, and the touch signal transmission parts 240 can be electrically connected to the second touch electrodes 220 one-to-one, so that the first touch electrodes 220 can be electrically connected one-to-one. A touch electrode 210 and a second touch electrode 220 can be electrically connected to at least one touch processing element (eg, the touch processing element 161 ). The touch signal transmission parts 140 and 240 may be disposed adjacent to the edge of the substrate 190 . Taking FIG. 2A as an example, the touch signal transmission part 140 can be disposed on the lower edge of the substrate 190 , and the touch signal transmission part 240 can be disposed on the right edge of the substrate 190 .

Each of the first touch electrodes 210 may further include contact pads 213 , wherein each of the contact pads 213 is connected to a shielding sub-portion 211 and is adjacent to the lower edge of the substrate 190 . The touch signal transmission parts 140 can be respectively disposed on the contact pads 213 and electrically connected to the contact pads 213, and the touch signal transmission parts 240 can be directly electrically connected to the second touch electrodes 220, as shown in FIG. 2A . shown. In addition, since the second touch electrodes 220 are located above the first touch electrodes 210 , the length of the touch signal transmission portion 140 is greater than the length of the touch signal transmission portion 240 .

FIG. 2B is a partially enlarged schematic diagram of FIG. 2A , wherein some elements of the touch display panel 200 are omitted in FIG. 2B , and only the first touch electrodes 210 , the second touch electrodes 220 , the light emitting elements 130 , the control The components 170 and the substrate 190 are used so that the features of the first touch electrodes 210 and the second touch electrodes 220 can be clearly and concisely presented in FIG. 2B .

Please refer to FIG. 1A , FIG. 2A and FIG. 2B , since the cross-sectional structures of the touch display panels 200 and 100 are substantially the same, and the touch display panel 200 also includes circuit layers 141 , 143 , 145 and 149 , insulating layers 181 , 182 AND 183 , protective layers 184 , 185 , 186 and 187 , light-emitting element 130 and control element 170 , so FIG. 1A is referred to here to describe the features of both the first touch electrodes 210 and the second touch electrodes 220 .

The second touch electrodes 220 are located above the control elements 170 and the insulating layer 181 , and can be disposed between the protective layers 185 and 186 , wherein the circuit layer 120 is also disposed between the protective layers 185 and 186 . The touch display panel 200 may include a circuit layer disposed between the protective layers 185 and 186 , like the circuit layer 120 shown in FIG. 1A , and the second touch electrodes 220 may be the above circuit layers (located on the protective layers 185 and 186 ). part of it). In addition, since the second touch electrodes 220 are disposed between the protective layers 185 and 186 , the touch signal transmission portion 240 may include the conductive pillars 148 and part of the circuit layer 149 , but does not include the circuit layers 141 , 143 and 145 and the conductive pillars 142, 144, 146 and 147.

Like the first touch electrodes 110 , the first touch electrodes 210 of the touch display panel 200 are also located between the insulating layer 181 and the substrate 190 (please refer to FIG. 1A ), so the first touch electrodes 210 are located on the Below the two touch electrodes 220 and separated from the second touch electrodes 220 , the insulating layers 181 , 182 and 183 and the protective layers 184 and 185 can be disposed between the first touch electrodes 210 and the second touch electrodes 220 , so that the first touch electrodes 210 and the second touch electrodes 220 are not electrically connected to each other, or even electrically insulated from each other.

Please refer to FIGS. 2A and 2B , the second touch electrodes 220 extend along the second direction D2 , wherein the second direction D2 shown in FIGS. 2A and 2B can be a horizontal direction, so the first direction D1 and the second direction D2 The two directions D2 may be substantially perpendicular to each other, so the first touch electrodes 210 and the second touch electrodes 220 are staggered, but the first touch electrodes 210 and the second touch electrodes 220 are not electrically connected to each other.

Each of the second touch electrodes 220 includes a plurality of electrode sub-sections 221 and a plurality of touch connection lines 222 . In the same second touch electrode 220, the electrode sub-sections 221 are arranged along the second direction D2, so that the second touch electrode 220 extends along the second direction D2. The touch signal transmission portions 240 can be respectively disposed on the electrode sub-portions 221 adjacent to the right edge of the substrate 190 and electrically connected to the electrode sub-portions 221 , as shown in FIG. 2A .

Each touch connection line 222 is connected to two adjacent electrode subsections 221 , so that the electrode subsections 221 of the same second touch electrode 220 can be electrically connected to each other. In addition, each electrode sub-section 221 does not overlap with any one of the shielding sub-sections 211 , but each touch connection line 222 spans the first extension strip V21 of one of the first touch electrodes 210 . Therefore, each touch connection line 222 overlaps with one of the shielding sub-sections 211 .

In this embodiment, the touch connecting lines 222 and the electrode sub-sections 221 may be formed by lithography and etching from the same conductive layer, and the touch connecting lines 222 and the electrode sub-sections 221 may be disposed on the Between the protective layers 185 and 186, the conductive layer can be a metal layer or a transparent conductive layer, and the transparent conductive layer can be made of transparent oxide such as indium tin oxide (ITO) or indium zinc oxide (IZO). Therefore, the touch connection lines 222 and the electrode sub-sections 221 may be coplanar.

However, in other embodiments, the touch connection lines 222 and the electrode sub-sections 221 may not be coplanar, and the touch connection lines 222 may not be disposed between the protective layers 185 and 186 . For example, the touch connection lines 222 can be disposed between two adjacent layers of the insulating layers 181 , 182 and 183 and the protective layers 184 and 185 . Alternatively, the touch connection lines 222 can also be disposed between the protective layers 186 and 187 , or can be disposed on the protective layer 187 . Therefore, the heights (levels) of the touch connecting lines 222 and the electrode sub-sections 221 relative to the substrate 190 may be the same or different.

The shielding sub-portions 211 are respectively located in the sub-pixel regions 193 , and the electrode sub-portions 221 are distributed in at least one sub-pixel region 193 . In this embodiment, each electrode sub-section 221 is distributed in a plurality of sub-pixel regions 193 . Taking FIG. 2B as an example, each electrode sub-section 221 is distributed in three sub-pixel regions 193 adjacent to each other and arranged in a 1×3 matrix. In addition, in the same first touch electrode 210 , each of the first extension strips V21 and the second extension strips L21 extends along the edge of each sub-pixel region 193 and is not connected to any electrode subsection. 221 overlap.

Referring to FIG. 2B , each of the second touch electrodes 220 has at least one first opening 229 . Taking FIG. 2B as an example, in the same second touch electrode 220 , each electrode subsection 221 may have a plurality of first openings 229 , such as the three first openings 229 shown in FIG. 2B , wherein the light-emitting elements 130 are respectively are located in these first openings 229 . The second touch electrodes 220 are respectively electrically connected to the light emitting elements 130 , wherein each of the second touch electrodes 220 is electrically connected to at least two light emitting elements 130 .

Taking FIG. 2B as an example, each electrode subsection 221 is electrically connected to the electrodes 132 of the three light-emitting elements 130 , wherein the electrodes 132 can be cathodes. Therefore, the second touch electrodes 220 can be electrically connected to the cathodes (eg, the electrodes 132 ) of the light emitting elements 130 respectively, wherein the second touch electrodes 220 can provide a common voltage to the electrodes 132 of the light emitting elements 130 , so that these light emitting elements 130 glows. In addition, although the second touch electrodes 220 are electrically connected to the electrodes 132 of the light emitting element 130 , the second touch electrodes 220 are not directly electrically connected to the electrodes 131 of the light emitting element 130 to avoid short circuits.

The first touch electrodes 210 and the second touch electrodes 220 have a touch sensing function. Specifically, the first touch electrodes 210 and the second touch electrodes 220 may be drive electrodes (Tx) and sensing electrodes (Rx). When each of the first touch electrodes 210 is a driving electrode, each of the second touch electrodes 220 is a sensing voltage. Conversely, when each of the first touch electrodes 210 is a sensing electrode, each of the second touch electrodes 220 is a driving voltage.

When the touch display panel 200 activates the touch sensing function, an electric field is generated at the adjacent edges of the first touch electrodes 210 and the second touch electrodes 220 . When an object (not shown, such as a finger or a stylus) approaches or touches the touch display panel 200, the electric field changes, and the first touch electrode 210 or the second touch electrode 220 serving as a sensing electrode The change of the electric field can be sensed, so that the touch processing element 161 can know the position of the object on the touch display panel 200 according to the change of the electric field. In this way, the user can operate the touch display panel 200 in a touch manner.

It is worth mentioning that, since the second touch electrodes 220 can provide a voltage (eg, a common voltage) to the electrodes 132 of the light emitting elements 130 to make the light emitting elements 130 emit light, during the operation of the touch display panel 200 , when the light emitting elements 130 emit light When the element 130 emits light to display an image, the second touch electrodes 220 will provide a voltage (such as a common voltage) to the electrodes 132 of the light emitting element 130, and the first touch electrodes 210 and the second touch electrodes 220 will temporarily stop The touch sensing function does not sense the position of the object on the touch display panel 200 to avoid disturbing the image.

When the touch display panel 200 activates the touch sensing function, the first touch electrodes 210 and the second touch electrodes 220 will sense the position of the object on the touch display panel 200 . At the same time, the second touch electrodes 220 also temporarily stop supplying voltage to the electrodes 132 of the light-emitting elements 130, so that the light-emitting elements 130 do not emit light temporarily. In addition, the time each time the first touch electrodes 210 and the second touch electrodes 220 sense an object is quite short, so that the light-emitting element 130 does not emit light for a very short time, such as 2 to 3 milliseconds (ms), so that The naked eye of ordinary people will not perceive that the image is affected by the light-emitting element 130 which is not emitting light.

3A is a schematic top view of a touch display panel according to another embodiment of the present invention, and FIG. 3B is a partially enlarged schematic view of FIG. 3A . The touch display panel 300 in this embodiment is similar to the aforementioned touch display panel 200 . For example, the touch display panel 300 is also a mutual inductive touch display panel, so the touch sensing principles of the touch display panels 200 and 300 are the same, and the touch display panel 300 also has a plurality of driving electrodes and a plurality of sensing electrodes .

Secondly, the touch display panel 300 also has substantially the same cross-sectional structure as the touch display panel 100 . As shown in FIG. 1A , the touch display panel 300 also includes multilayer circuit layers 141 , 143 , 145 and 149 , a plurality of touch Control signal transmission parts 140 and 240 , multi-layer insulating layers 181 , 182 and 183 , multi-layer protective layers 184 , 185 , 186 and 187 , a plurality of light-emitting elements 130 , a plurality of control elements 170 , a plurality of transparent layers 151 , and a black matrix layer 152 , the touch processing element 161 and the circuit board 162 . Therefore, the same features of the touch display panels 300 and 200 are not repeated in principle, and the cross-sectional schematic diagram of the touch display panel 300 is not shown.

The touch display panel 300 includes a plurality of first touch electrodes 310 and a plurality of second touch electrodes 320 , wherein the first touch electrodes 310 and the second touch electrodes 320 may be driving electrodes and sensing electrodes. For example, the first touch electrodes 310 are driving electrodes, and the second touch electrodes 320 are sensing electrodes. Alternatively, the first touch electrodes 310 are sensing electrodes, and the second touch electrodes 320 are driving electrodes. In addition, each of the second touch electrodes 320 can also be electrically connected to one or more electrodes 132 of the light-emitting elements 130 , and can provide a voltage (eg, a common voltage) to the light-emitting elements 130 . Therefore, the image display modes of the touch display panels 300 and 200 can also be the same.

The difference between the touch display panels 300 and 200 is only that the first touch electrodes 310 and 210 are different, and the second touch electrodes 320 and 220 are different. Since both the touch display panels 300 and 200 include some identical elements, and the difference between the touch display panel 300 and the touch display panel 200 is only the first touch electrodes 310 and the second touch electrodes 320 , the difference between FIG. 3A and FIG. 3B omits to show some elements of the touch display panel 300, wherein FIG. 3A only shows the first touch electrodes 310, the second touch electrodes 320, the touch signal transmission parts 140 and 240, and the substrate 190, and FIG. 3B Then, the light-emitting element 130 and the control element 170 are additionally shown in FIG. 3A . In addition, FIG. 1A is still referred to below to describe the features of both the first touch electrodes 310 and the second touch electrodes 320 .

Please refer to FIG. 1A , FIG. 3A and FIG. 3B , the first touch electrodes 310 and the second touch electrodes 320 are all disposed on the substrate 190 , wherein the second touch electrodes 320 are located above the first touch electrodes 310 . For example, the first touch electrodes 310 may be located between the substrate 190 and the insulating layer 181 , and the second touch electrodes 320 may be located between the protective layers 185 and 186 , so the second touch electrodes 320 are located between the first touch electrodes above the 310.

The first touch electrodes 310 all extend along the first direction D3, and the second touch electrodes 320 all extend along the second direction D4, wherein the first direction D3 is different from the second direction D4. Taking FIG. 3A as an example, the first direction D3 may be a horizontal direction, and the second direction D4 may be a vertical direction, so the first direction D3 is substantially perpendicular to the second direction D4.

Since the first direction D3 is different from the second direction D4, the first touch electrodes 310 and the second touch electrodes 320 are staggered. In addition, in other embodiments, the first direction D3 can be a vertical direction (like the first direction D1 in FIG. 2A ), and the second direction D4 can be a horizontal direction (like the second direction D2 in FIG. 2A ), so The first direction D3 is not limited to be the horizontal direction, and the second direction D4 is not limited to be the vertical direction.

Each of the first touch electrodes 310 includes a plurality of shielding sub-sections 311 , wherein the shielding sub-sections 311 in the same first touch electrode 310 are all arranged along the first direction D3 and are electrically connected to each other. Specifically, each of the first touch electrodes 310 further includes a plurality of touch connection lines 312 , wherein these touch connection lines 312 may extend along the first direction D3 , and each touch connection line 312 connects two adjacent touch lines 312 . The sub-section 311 is shielded. In this way, in the same first touch electrode 310 , the touch connecting wires 312 can electrically connect the shielding sub-sections 311 to each other.

In this embodiment, the touch connection lines 312 and the shielding sub-sections 311 may be formed by photolithography and etching of the same conductive layer, wherein the conductive layer is, for example, a metal layer or the aforementioned transparent conductive layer. The touch connecting wires 312 and the shielding sub-sections 311 are both disposed between the substrate 190 and the insulating layer 181 , and the touch connecting wires 312 and the shielding sub-sections 311 may be coplanar.

However, in other embodiments, the touch connection line 312 and the shielding sub-section 311 may not be coplanar, and the touch connection line 312 may not be disposed between the substrate 190 and the insulating layer 181 . For example, the touch connection lines 312 may be disposed between two adjacent layers of the insulating layers 181 , 182 and 183 and the protective layers 184 and 185 . Alternatively, the touch connection lines 312 can also be disposed between the protective layers 186 and 187 , or can be disposed on the protective layer 187 . Therefore, the heights of the touch connecting wires 312 and the shielding sub-sections 311 relative to the substrate 190 may be the same or different.

Each second touch electrode 320 includes a plurality of electrode subsections 321 , wherein the electrode subsections 321 in the same second touch electrode 320 are arranged along the second direction D4 and are electrically connected to each other. In this embodiment, each electrode subsection 321 includes a first electrode strip V32 and two second electrode strips L32. In the same electrode subsection 321, one of the first electrode strips V32 is located between two adjacent second electrode strips L32, and connects the two adjacent second electrode strips L32.

The extending directions of each of the first electrode strips V32 and each of the second electrode strips L32 are different. Taking FIG. 3A as an example, the first electrode bar V32 extends along the second direction D4, and the second electrode bar L32 extends along the first direction D3. Since in this embodiment, the first direction D3 and the second direction D4 are substantially perpendicular, the first electrode strip V32 and the second electrode strip L32 may be substantially perpendicular to each other, so that the shape of each electrode subsection 321 may be cruciform.

In the same second touch electrode 320, each first electrode strip V32 may extend along the edge of each sub-pixel region 193, and each shielding sub-portion 311 may also be connected to each sub-pixel along the first direction D3 Therefore, the first touch electrodes 310 and the second touch electrodes 320 can be basically distributed along the edges of the sub-pixel regions 193 . In addition, the electrode sub-section 321 does not overlap with the shielding sub-section 311, as shown in FIG. 3A and FIG. 3B .

In particular, in the touch display panel 300 shown in FIG. 3A , the touch signal transmission parts 140 and 240 are respectively electrically connected to the first touch electrodes 310 and the second touch electrodes 320 . The touch signal transmission parts 140 can be electrically connected to the first touch electrodes 310 one-to-one, and can be disposed near the edge of the substrate 190 , such as the right edge of the substrate 190 , wherein the touch signal transmission parts 140 can be The plurality of shielding sub-sections 311 adjacent to the right edge of the substrate 190 are respectively electrically connected.

The touch signal transmission parts 240 can also be electrically connected to the second touch electrodes 320 one-to-one, and can also be disposed adjacent to the edge of the substrate 190 , such as the lower edge of the substrate 190 . Each of the second touch electrodes 320 may further include contact pads 323 , wherein each of the contact pads 323 is connected to the first electrode strips V32 of one electrode subsection 321 and is adjacent to the lower edge of the substrate 190 . The touch signal transmission parts 240 can be respectively disposed on the contact pads 323 and electrically connected to the contact pads 323 . In this way, the second touch electrodes 320 are electrically connected to the touch signal transmission parts 240 .

Using the touch signal transmission parts 140 and 240 , the first touch electrodes 310 and the second touch electrodes 320 can be electrically connected to touch processing elements (eg, the touch processing elements 161 ), so that the touch processing elements can pass through these first touch processing elements. A touch electrode 310 and the second touch electrodes 320 sense the position of the object on the touch display panel 300 .

FIG. 4A is a schematic top view of a touch display panel according to another embodiment of the present invention, and FIG. 4B is a partially enlarged schematic view of FIG. 4A . The touch display panel 400 in this embodiment is similar to the aforementioned touch display panel 300 . For example, the touch display panel 400 is also a mutual-inductance touch display panel, and the touch display panel 400 also has substantially the same cross-sectional structure as shown in FIG. 1A , wherein the touch display panels 300 and 400 also include some same or similar element. For example, the touch display panel 400 includes a plurality of first touch electrodes 410 and a plurality of second touch electrodes 420 .

The main differences between the touch display panels 400 and 300 are: the first touch electrodes 410 and 310 are different from each other, the second touch electrodes 420 and 320 are also different from each other, and at least two control elements 170 are disposed in each sub-pixel Within District 193. The following content mainly describes the differences between the touch display panels 400 and 300 , and the same technical features will not be repeated in principle. In addition, since the touch display panel 400 has substantially the same cross-sectional structure as that of FIG. 1A , the cross-sectional schematic diagram of the touch display panel 400 is not shown.

Referring to FIGS. 4A and 4B , each of the first touch electrodes 410 includes a plurality of shielding sub-sections 411 and a plurality of touch connecting lines 412 , wherein the shielding sub-sections 411 of the same first touch electrode 410 can be along the They are arranged in one direction D3 , and each touch connection line 412 is connected to two adjacent shielding sub-sections 411 . Therefore, the first touch electrodes 410 all extend along the first direction D3, and in the same first touch electrode 410, the touch connection lines 412 can electrically connect the shielding sub-sections 411 to each other.

At least two control elements 170 are disposed in each sub-pixel region 193 , and the shielding sub-sections 411 are respectively located in these sub-pixel regions 193 . Taking FIG. 4A and FIG. 4B as an example, the shielding sub-sections 411 may be disposed in the sub-pixel regions 193 one-to-one, wherein each shielding sub-section 411 may overlap with a plurality of control elements 170 , and at least one or each The shielding subsection 411 may overlap with more than two control elements 170, as shown in FIG. 4B.

In the same sub-pixel region 193, the control elements 170 can be directly electrically connected to the light-emitting element 130 to control the light-emitting element 130 to emit light. Alternatively, the touch display panel 400 may have an in-plane gate driver circuit (GIP), and at least one light-emitting element 130 in the same sub-pixel region 193 may be a gate driver in the above-mentioned in-plane gate driver circuit. element.

Each of the second touch electrodes 420 may have at least one first opening 429 and at least one second opening 428 . Taking FIGS. 4A and 4B as an example, each of the second touch electrodes 420 may have a plurality of first openings 429 and a plurality of second openings 428 , wherein the light-emitting elements 130 are respectively located in the first openings 429 , and the shielding elements The portions 411 are located in these second openings 428, respectively. Taking FIG. 4B as an example, the shielding sub-sections 411 may be disposed in the second openings 428 on a one-to-one basis.

In addition, the light emitting elements 130 located in the first openings 429 are electrically connected to the second touch electrodes 420 , wherein the second touch electrodes 420 are electrically connected to the electrodes 132 of the light emitting elements 130 . However, the shielding sub-sections 411 located in the second openings 428 are not directly electrically connected, nor are they in contact with any second touch electrodes 420 , so as to avoid the gap between the first touch electrodes 410 and the second touch electrodes 420 A short circuit has occurred.

Each of the second touch electrodes 420 is distributed in the plurality of sub-pixel regions 193 arranged in at least one row along the second direction D4. Specifically, as seen from FIG. 4B , these sub-pixel regions 193 are arranged in rows and columns, wherein a plurality of sub-pixel regions 193 are vertically arranged in multiple rows along the second direction D4 . The second touch electrodes 420 extend along the second direction D4 and are respectively disposed in the sub-pixel regions 193 vertically arranged in multiple rows.

Since the first direction D3 is substantially perpendicular to the second direction D4, the first touch electrodes 410 and the second touch electrodes 420 are staggered. However, the shielding sub-sections 411 do not overlap with any second touch electrodes 420 , and only the touch connecting lines 412 overlap with the second touch electrodes 420 . In other words, the second touch electrodes 420 can span the touch connection lines 412 respectively, as shown in FIG. 4A and FIG. 4B .

In addition, each of the first touch electrodes 410 may further include contact pads 413 and connection lines 414, wherein each connection line 414 connects the adjacent contact pads 413 and the shielding sub-sections 411, so that the contact pads 413 are electrically connected to a plurality of shielding sub-sections 411 Subsection 411. Each of the contact pads 413 can be adjacent to the edge of the substrate 190 , such as the right edge, and the touch signal transmission parts 140 can be respectively disposed on the contact pads 413 and electrically connected to the contact pads 413 , so that the first touch electrodes 410 The touch signal transmission parts 140 are electrically connected.

The touch signal transmission parts 240 are electrically connected to the second touch electrodes 420 respectively, and can be adjacent to the edge of the substrate 190 , such as the lower edge. Using the touch signal transmission parts 140 and 240 , the first touch electrodes 410 and the second touch electrodes 420 can be electrically connected to the touch processing element (eg, the touch processing element 161 ), so that the touch processing element can pass through the first touch processing element 161 . The touch electrodes 410 and the second touch electrodes 420 sense the position of the object on the touch display panel 300 , so that the user can operate the touch display panel 400 by touch.

FIG. 5 is a schematic top view of a touch display panel according to another embodiment of the present invention. Please refer to FIG. 5 . The touch display panel 500 disclosed in FIG. 5 is similar to the touch display panel 400 in FIG. 4B . The difference between the touch display panels 400 and 500 is only that the touch display panel 500 includes many A first touch electrode 510 and a plurality of second touch electrodes 520 . The differences between the touch display panels 500 and 400 will be mainly described below, and the same features of the two will not be repeated in principle.

Specifically, each of the first touch electrodes 510 includes a connecting line 414 , a plurality of touch connecting lines 412 , a plurality of contact pads 413 and a plurality of shielding sub-sections 511 , wherein each shielding sub-section 511 includes a plurality of light shielding layers 511p. The light-shielding layers 511p in the same shielding sub-section 511 are electrically connected to each other, and overlap with the plurality of control elements 170 respectively. For example, the light shielding layers 511p may overlap the control elements 170 on a one-to-one basis. In addition, the light shielding layers 511p of each shielding sub-section 511 may be arranged in an array.

Taking FIG. 5 as an example, the same shielding subsection 511 includes six shielding layers 511p arranged in a 2×3 matrix, wherein the six shielding layers 511p are connected to each other by wirings (not marked), so that the same shielding layer 511p is connected to each other. The six light-shielding layers 511p in one shielding sub-section 511 can be electrically connected to each other. In addition, each of the second touch electrodes 520 has a plurality of first openings 429 and a plurality of second openings 428 , wherein a plurality of light shielding layers 511p can be disposed in a single second opening 428 . For example, three light shielding layers 511p may be disposed in one second opening 428, as shown in FIG. 5 .

Please refer to FIG. 1A again. It is particularly noted that, in the above embodiment, a plurality of second touch electrodes (eg, the second touch electrodes 220 , 320 , 420 or 520 ) may be located between the protective layers 185 and 186 . However, in other embodiments, as long as the second touch electrodes are not coplanar with the first touch electrodes, the second touch electrodes may also be located at other positions. Therefore, the above-mentioned second touch electrodes may be located between any two adjacent layers of the insulating layers 181 , 182 , 183 and the protective layers 184 , 185 , 186 and 187 . For example, the second touch electrodes can also be located between the insulating layers 181 and 182 or between the protective layers 186 and 187 . Therefore, the above second touch electrodes are not limited between the protective layers 185 and 186 .

To sum up, with the above touch electrodes (eg, the first touch electrodes, or the first and second touch electrodes), the touch display panel of at least one embodiment of the present invention can provide the function of touch sensing , so that the user can operate the touch display panel by touch. Secondly, since the first touch electrodes are located between the insulating layer and the substrate, the second touch electrodes can be located between two adjacent protective layers, between two adjacent insulating layers, or adjacent protective layers and insulating layers Therefore, the above-mentioned touch electrodes are located inside the touch display panel. Compared with the existing plug-in type touch display, the above disclosed touch display panel design is beneficial to reduce the thickness of electronic devices such as mobile phones and tablet computers, so as to meet the current development trend of thinning electronic devices.

Although the present invention has been disclosed above by the embodiments, it is not intended to limit the present invention. Those with ordinary knowledge in the technical field to which the present invention pertains may make some changes and modifications without departing from the spirit and scope of the present invention. The scope of protection of the invention shall be determined by the scope of the appended patent application.

100, 200, 300, 400, 500: touch display panel 110, 210, 310, 410, 510: first touch electrodes 111, 211, 311, 411, 511: shielding subsection 110h: light outlet 120, 141, 143, 145, 149: circuit layer 121, 122: Electrode layer 130: Light-emitting element 131, 132: Electrodes 133: Main layer 140, 240: touch signal transmission part 142, 144, 146, 147, 148: Conductive pillars 151: Transparent layer 152: black matrix layer 152h: Opening 153, 154: Conductive materials 161: Touch Processing Components 162: circuit board 170: Control elements 181, 182, 183: insulating layer 184, 185, 186, 187: protective layer 190: Substrate 191, 192: Surface 193: Sub-pixel area 213, 323, 413: Contact pads 220, 320, 420, 520: the second touch electrode 221, 321: Electrode sub-section 222, 312, 412: touch cable 229, 429: The first opening 428: Second Opening 414: connecting line 511p: shading layer AC1: Conductive Bonding Material C17: Channel Layer D1, D3: the first direction D2, D4: the second direction D17: drain G17: Gate L1: light L21: Second extension bar L32: Second electrode strip N1: normal R17: Doping part S17: Source V21: The first extension V32: First electrode strip

FIG. 1A is a schematic cross-sectional view of a touch display panel according to at least one embodiment of the present invention. FIG. 1B is a schematic top view of the touch display panel in FIG. 1A . 2A is a schematic top view of a touch display panel according to another embodiment of the present invention. FIG. 2B is a partial enlarged schematic view of FIG. 2A . 3A is a schematic top view of a touch display panel according to another embodiment of the present invention. FIG. 3B is a partial enlarged schematic view of FIG. 3A . 4A is a schematic top view of a touch display panel according to another embodiment of the present invention. FIG. 4B is a partial enlarged schematic view of FIG. 4A . FIG. 5 is a schematic top view of a touch display panel according to another embodiment of the present invention.

100: Touch display panel

110: The first touch electrode

111: Shading the subsection

110h: light outlet

130: Light-emitting element

131, 132: Electrodes

133: Main layer

140: Touch signal transmission part

170: Control elements

190: Substrate

193: Sub-pixel area

Claims (20)

A touch display panel, comprising: a substrate having a surface and a plurality of sub-pixel regions located on the surface, wherein the sub-pixel regions are arranged in an array; A plurality of first touch electrodes are disposed on the substrate, and each of the first touch electrodes includes a plurality of shielding sub-portions electrically connected to each other, wherein each of the shielding sub-portions is distributed in at least one of the sub-pixel regions ; an insulating layer disposed on the first touch electrodes, wherein the first touch electrodes are located between the insulating layer and the substrate; a plurality of control elements disposed on the insulating layer, wherein at least one of the control elements is disposed in each of the sub-pixel regions, and the first touch electrodes overlap with the control elements; a plurality of light-emitting elements disposed on the insulating layer and electrically connected to the control elements, wherein the first touch electrodes do not overlap with the light-emitting elements, and at least one of the light-emitting elements is disposed on each sub-pixel the area; and A plurality of touch signal transmission parts are electrically connected to the first touch electrodes respectively. The touch display panel according to claim 1, wherein the shielding sub-portions of the same first touch electrode are arranged periodically corresponding to the sub-pixel regions. The touch display panel of claim 1, wherein each of the light-emitting elements is adapted to emit a light toward the substrate. The touch display panel according to claim 1, further comprising: At least one touch processing element is disposed on the insulating layer, wherein the touch signal transmission parts pass through the insulating layer, and the at least one touch processing element is electrically connected to the touch signal transmission parts, and passes through the touch signal transmission parts The touch signal transmission parts are electrically connected to the first touch electrodes. The touch display panel of claim 1, wherein the first touch electrodes are separated from each other and are not directly electrically connected to each other. The touch display panel according to claim 5, wherein the shielding sub-sections of the same first touch electrode are connected to each other, and each of the first touch electrodes is distributed on a plurality of the first touch electrodes that are adjacent to each other and are arranged in an array. sub-pixel area. The touch display panel of claim 1, wherein the first touch electrodes extend along a first direction, and the shielding subsections of the same first touch electrode are arranged along the first direction , the touch display panel further includes: A plurality of second touch electrodes are located on the control elements and the insulating layer and extend along a second direction, wherein the first touch electrodes are interlaced with the second touch electrodes, and the The first touch electrodes and the second touch electrodes are not electrically connected to each other. The touch display panel of claim 7, wherein the second touch electrodes are respectively electrically connected to the light emitting elements, and each of the second touch electrodes is electrically connected to at least two of the light emitting elements. The touch display panel according to claim 7, wherein each of the first touch electrodes comprises: A plurality of touch connection lines extend along the first direction, wherein each touch connection line connects two adjacent shielding sub-sections. The touch display panel of claim 9, wherein each of the second touch electrodes is distributed in a plurality of the sub-pixel regions arranged in at least one row along the second direction, and the second touch electrodes The electrodes span the touch connection lines respectively. The touch display panel of claim 7, wherein the shielding sub-portions are respectively located in the sub-pixel regions, and each of the second touch electrodes has: at least one first opening, wherein the light-emitting elements are respectively located in the first opening of the second touch electrodes; and At least one second opening, wherein the shielding subsections are respectively located in the second openings of the second touch electrodes. The touch display panel according to claim 11, wherein at least two of the control elements are arranged in each of the sub-pixel regions. The touch display panel of claim 12, wherein each of the shielding subsections comprises: A plurality of light shielding layers are electrically connected to each other and overlap with the control elements respectively. The touch display panel of claim 13, wherein the light-shielding layers of each of the shielding subsections are arranged in an array. The touch display panel according to claim 7, wherein at least one of the shielding subsections comprises: a first extension strip extending along the first direction, wherein the first extension strips of two adjacent shielding subsections are connected to each other; and Two second extension bars extend along the second direction, wherein one of the first extension bars is located between two adjacent second extension bars and connects two adjacent second extension bars. The touch display panel of claim 15, wherein any one of each of the first extension strips and each of the second extension strips further extends along an edge of each of the sub-pixel regions. The touch display panel according to claim 7, wherein each of the second touch electrodes comprises: A plurality of electrode sub-sections are arranged along the second direction, wherein each of the electrode sub-sections is distributed in at least one of the sub-pixel regions, and does not overlap with any of the shielding sub-sections. The touch display panel of claim 17, wherein each of the electrode sub-portions is distributed in a plurality of the sub-pixel regions. The touch display panel of claim 17, wherein each of the second touch electrodes further comprises: A plurality of touch connection lines, wherein each touch connection line is connected to two adjacent electrode subsections and spans one of the first touch electrodes. The touch display panel according to claim 17, wherein each of the electrode subsections comprises: a first electrode strip; and Two second electrode strips, one of the first electrode strips is located between two adjacent second electrode strips, and connects two adjacent second electrode strips, and each of the first electrode strips and each of the second electrode strips The two strips extend in different directions.

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