Touch display panel

A touch display panel includes pixels, a first sensing line segment, a first connecting electrode and an insulating layer. The pixels are divided into a first group and a second group, and the first group includes a first region and a second region. Each pixel includes an active device, a pixel electrode and a common electrode. The first sensing line segment is disposed in a portion of the pixels of the first region. The insulating layer includes at least one first opening be adapted to expose a portion of the first sensing line segment or a portion of the first connecting electrode, and the first connecting electrode is connected to the portion of the first sensing line segment via the first opening to form a first sensing line. The common electrode at the first region is connected to the first connecting electrode, the common electrode at the second region is connected to the common electrode at the first region to form a first sensing electrode, and the common electrode at the second region is not directly connected to the first connecting electrode.

CROSS-REFERENCE TO RELATED APPLICATION

The present application claims the benefit of Taiwan application TW 104135983, filed Nov. 2, 2015.

TECHNICAL FIELD

The present disclosure relates to a touch display panel, and in particular to a touch display panel integrating touch devices and a display device.

BACKGROUND

Touch sensing technology has rapidly developed in recent years, and many consumer electronic products provided with a touch function have appeared. In such products, mostly, the region of an original display panel is configured with a touch sensing function. In other words, the original simple display panel is modified into a touch display panel having a touch recognition function. According to differences between structural designs of touch display panels, they can be generally divided into out-cell and in-cell/on-cell touch display panels, in which fabrication of an additional touch panel is not required for the in-cell/on-cell touch display panels. As a result, the products have become lighter and slimmer and the manufacturing cost of the touch panels has been reduced. However, the integration of touch devices into a display panel is rather difficult and complicated, and thus there are continuing efforts in related industries to further reduce the manufacture cost and the complexity of an in-cell/on-cell touch display panel.

SUMMARY OF THE DISCLOSURE

A primary objective of the present disclosure is to provide a touch display panel in which touch devices are integrated into a display panel without adding an additional conductive layer.

In one aspect of the present disclosure, a touch display panel is provided. In certain embodiments, the touch display panel comprises a plurality of pixels, a first sensing line segment, a first connecting electrode and an insulating layer. The pixels are divided into a first group and a second group, the first group comprises a first region and a second region, the second group comprises a third region and a fourth region, each of the pixels comprises an active device, a pixel electrode and a common electrode, the active device comprises a gate electrode, a source electrode and a drain electrode, the gate electrode is connected to a scan line, the source electrode is connected to a data line, and the drain electrode is connected to the pixel electrode. The first sensing line segment is disposed in a portion of the pixels of the first region and a portion of the pixels of the third region. The insulating layer is sandwiched between the first connecting electrode and the first sensing line segment, the insulating layer comprising at least one first opening be adapted to expose a portion of the first sensing line segment or a portion of the first connecting electrode, wherein the first connecting electrode is connected to the portion of the first sensing line segment via the first opening to form a first sensing line, the common electrode at the first region is connected to the first connecting electrode, the common electrode at the second region is connected to the common electrode at the first region to form a first sensing electrode, and the common electrode at the second region is not directly connected to the first connecting electrode.

In another aspect of the present disclosure, a touch display panel is provided. In certain embodiments, the touch display panel comprises a plurality of pixels, a first sensing line and an insulating layer. The pixels are divided into a first group and a second group, the first group comprises a first region and a second region, the second group comprises a third region and a fourth region, each of the pixels comprises an active device, a pixel electrode and a common electrode, the active device comprises a gate electrode, a source electrode and a drain electrode, the gate electrode is connected to a scan line, the source electrode is connected to a data line, and the drain electrode is connected to the pixel electrode. The first sensing line is disposed in a portion of the pixels of the first region and extends through a portion of the pixels of the third region. The insulating layer is sandwiched between the first sensing line and the common electrode, and the insulating layer comprises at least one first opening be adapted to expose a portion of the first sensing line, wherein the common electrode at the first region is connected to the first sensing line, the common electrode at the second region is connected to the common electrode at the first region to form a first sensing electrode, and the common electrode at the second region is not directly connected to the first sensing line.

DETAILED DESCRIPTION OF THE DISCLOSURE

In order to assist a person of ordinary skill in the art to further understand the features and technical content of the present disclosure, reference can be made to the detailed description and accompanying drawings of the present disclosure. However, the accompanying drawings are only provided for reference and illustration, and not intended to limit the present disclosure.

FIG. 1shows a schematic cross-sectional view of a touch display panel according to a first embodiment of the present disclosure. As shown inFIG. 1, the touch display panel1A of the present embodiment comprises an array substrate10, an opposite substrate20and a display medium layer30. The opposite substrate20is disposed opposite to the array substrate10, and the display medium layer30is disposed between the array substrate10and the opposite substrate20. The array substrate10and the opposite substrate20may include a glass substrate, a plastic substrate, or other suitable rigid or flexible substrates. The array substrate10of the present embodiment is exemplified by a glass substrate, but is not limited thereto. The array substrate10may selectively comprise a passive device (for example, capacitor, resistor, etc.), an alignment layer, a drive and control circuit, or other suitable devices disposed between the display medium layer30and the array substrate10, and the opposite substrate20may selectively comprise a color filter, a black matrix, or other suitable devices disposed between the display medium layer30and the opposite substrate20. However, the present disclosure is not limited thereto. In addition, at least one of the color filter and the black matrix may selectively be disposed on the array substrate10, and thus may be referred to as a color filter on array substrate10(COA) or black matrix on array substrate10(BOA). The display medium layer30may be, for example, a liquid crystal layer or an electrophoresis layer, but is not limited thereto. In the present embodiment, the touch display panel1A drives the display medium layer30in fringe field switching mode, but the present disclosure is not limited thereto. In other alternative embodiments, the touch display panel may drive the display medium layer30in in-plane switching mode or other suitable modes.

Referring toFIG. 2toFIG. 5,FIG. 2shows a schematic view of a sensing electrode and a sensing line of the touch display panel according to the first embodiment of the present disclosure,FIG. 3shows an enlarged schematic view of an X region inFIG. 2of an array substrate according to the first embodiment of the present disclosure,FIG. 4shows a schematic cross-sectional view along a cut line A-A′ ofFIG. 3of the array substrate according to the first embodiment of the present disclosure, andFIG. 5shows an enlarged schematic view of a Y region inFIG. 2of the array substrate according to the first embodiment of the present disclosure, wherein the cross-sectional view of the array substrate10ofFIG. 4also shows the corresponding opposite substrate20and the display medium layer30.

As shown inFIG. 2toFIG. 4, the touch display panel1A of the present embodiment comprises a plurality of pixels P, a first sensing line segment102, a first connecting electrode104, and an insulating layer106. As shown inFIG. 2, the pixels P may be disposed on the array substrate10, and may be divided into a first group G1and a second group G2, wherein the first group G1has a first region R1and a second region R2, and the second group G2comprises a third region R3and a fourth region R4. As shown inFIG. 3andFIG. 4, each of the pixels comprises an active device SW, a pixel electrode PE and a common electrode CE. The active device SW may be a thin film transistor (TFT), such as an amorphous silicon TFT, a polycrystalline silicon TFT, a microcrystalline silicon TFT, a monocrystalline silicon TFT, an oxide semiconductor TFT, an organic semiconductor TFT or other semiconductor materials of TFT, and the thin film transistor may be selected from top gate TFTs, bottom gate TFTs or other types of TFTs. In the present embodiment, a bottom gate TFT is used as an example for the active device SW, and has a gate electrode108, a source electrode110, a drain electrode112, an insulating layer106, a channel layer107, and a gate dielectric layer105.

The gate electrode108is disposed on the array substrate10and connected to a scan line114. The gate dielectric layer105is disposed on the gate electrode108and the array substrate10. The channel layer107is disposed on the gate dielectric layer105and overlaps with the gate electrode108in a vertical projection direction Z. A material of the channel layer107may be selected from semiconductor layers (for example, amorphous silicon, polycrystalline silicon, microcrystalline silicon, monocrystalline silicon, or other suitable materials), oxide semiconductor layers (for example, indium gallium zinc oxide (IGZO), other suitable materials or stacks of the aforementioned materials), organic semiconductor materials, or other suitable semiconductor materials. The drain electrode112and the source electrode110are disposed on the channel layer107and the gate dielectric layer105, the source electrode110is connected to the data line116, and the drain electrode112is connected to the pixel electrode PE.

The insulating layer106is disposed on the drain electrode112, the source electrode110, the channel layer107, the gate dielectric layer105, and the pixel electrode PE, and the common electrode CE is disposed on the insulating layer106. Materials of the insulating layer106and the gate dielectric layer105may include inorganic insulating materials, organic insulating materials, or stacks of the aforementioned materials. The inorganic insulating materials may be for example silicon oxide, silicon nitride, silicon oxynitride, other suitable materials, or stacks of the aforementioned materials, and the organic insulating materials may be for example acrylic, photoresists, epoxies, other suitable materials, or stacks of the aforementioned materials. The pixel electrode PE and the common electrode CE may be transparent electrodes, such as indium tin oxide (ITO) electrodes, other suitable materials, or stacks of the aforementioned materials. In other embodiments, a top gate TFT is used as an example for the active device SW. In this case, the channel layer107is disposed below the gate electrode108and the gate dielectric layer105is disposed between the channel layer107and the gate electrode108, and the other components are not repeatedly described.

As shown inFIG. 3andFIG. 4, the first sensing line segment102is disposed in a portion of the pixels P of the first region R1, and the insulating layer106is sandwiched between the first connecting electrode104and the first sensing line segment102. The insulating layer106comprises at least one first opening118for exposing a portion of the first sensing line segment102or a portion of the first connecting electrode104. The first connecting electrode104is connected to said portion of the first sensing line segment102via the first opening118to form a first sensing line120. In particular, the insulating layer106of the present embodiment is disposed above the first sensing line segment102, the portion of the first sensing line segment102is exposed via the first opening118passing through the insulating layer106and the gate dielectric layer105, and the first connecting electrode104is disposed on the insulating layer106and is connected to the exposed portion of the first sensing line segment102.

On the other hand, the common electrode CE at the first region R1is connected to the first connecting electrode104, the common electrode CE at the second region R2is connected to the common electrode CE at the first region R1to form a first sensing electrode122, and the common electrode CE at the second region R2is not directly connected to the first connecting electrode104; namely, the common electrode CE at the second region R2is connected to the first connecting electrode104through the common electrode CE at the first region R1. Furthermore, a portion of the first sensing line segment102in the present embodiment proximal to the active device SW may have a bent shape or curved shape, and two neighboring first sensing line segments102are connected by the first connecting electrode104such that the first sensing line120may keep from (or namely keep away from, or avoid) the active device SW, wherein the shape of the bending is not limited. In addition, the active device SW does not exist in the first sensing line120, or namely the first sensing line120does not exist the active device SW. Alternatively, for example, the first sensing line120may be not connected to the active device SW.

As shown inFIG. 4andFIG. 5, the touch display panel1A of the present embodiment further comprises a second sensing line segment124and a second connecting electrode126. The second sensing line segment124is disposed in another portion of the pixels P of the third region R3. The insulating layer106is also sandwiched between the second connecting electrode126and the second sensing line segment124, and the insulating layer106further comprises at least one second opening128for exposing a portion of the second sensing line segment124or a portion of the second connecting electrode126. The second connecting electrode126is connected to said portion of the second sensing line segment124via the second opening128to form a second sensing line130. In particular, the insulating layer106of the present embodiment is disposed above the second sensing line segment124, the portion of the second sensing line segment124is exposed via the second opening128passing through the insulating layer106and the gate dielectric layer105, and the second connecting electrode126is disposed on the insulating layer106and is connected to the exposed portion of the second sensing line segment124. The relative positions of the second sensing line segment124, the second connecting electrode126and the insulating layer106may be substantially the same as those of the first sensing line segment102, the first connecting electrode104and the insulating layer106, as can be referred to inFIG. 4.

As shown inFIG. 5, the common electrode CE at the third region R3is connected to the second connecting electrode126, the common electrode CE at the fourth region R4is connected to the common electrode CE at the third region R3to form a second sensing electrode132, and the common electrode CE at the fourth region R4is not directly connected to the second connecting electrode126; namely, the common electrode CE at the fourth region R4is connected to the second connecting electrode126through the common electrode CE at the third region R3. In addition, the first sensing electrode122is not connected to the second sensing electrode132; namely, the first sensing electrode122and the second sensing electrode132are separate from each other, and the first sensing line120is not connected to the second sensing line130; namely, the first sensing line120and the second sensing line130are separate from each other, and the common electrode CE at the third region R3is not connected to the first sensing line120. On the other hand, a portion of the second sensing line segment124in the present embodiment proximal to the active device SW may have a bent shape or curved shape, and two neighboring second sensing line segments124are connected by the second connecting electrode126such that the second sensing line130may keep from (or namely keep away from, or avoid) the active device SW, wherein the shape of the bending is not limited. In addition, the active device SW does not exist in the second sensing line130, or namely the second sensing line130does not exist the active device SW. Alternatively, for example, the second sensing line130may be not connected to the active device SW.

It is also to be noted that, in the present embodiment, the first sensing line segment102, the second sensing line segment124and the scan line114are in the same conductive-pattern layer (for example, a first conductive-pattern layer), and neither the first sensing line segment102nor the second sensing line segment124is connected with the scan line114; namely, the first sensing line segment102, the second sensing line segment124and the scan line114are separate from each other. In particular, the first sensing line segment102and the second sensing line segment124may be not connected to each other; namely, the first sensing line segment102and the second sensing line segment124are separate from each other. The first sensing line segment102and the scan line114may be not connected to each other; namely, the first sensing line segment102and the scan line114are separate from each other. The second sensing line segment124and the scan line114may be not connected to each other; namely, the second sensing line segment124and the scan line114are separate from each other.

It should be noted that, since the first sensing line120extends through the third region R3, the first connecting electrode104forming the first sensing line120is not connected to the common electrode CE at the fourth region R4, the common electrode CE at the third region R3and the second connecting electrode126; namely, the first connecting electrode104forming the first sensing line120, the common electrode CE at the fourth region R4, the common electrode CE at the third region R3, and the second connecting electrode126are all separate from each other. Similarly, the description of other sensing lines is as described above. In addition, the first connecting electrode104and the second connecting electrode126may be in the same conductive-pattern layer as the common electrode CE, for example. However, the present disclosure is not limited thereto.

Furthermore, the data line116may partially overlap with or not overlap with the first sensing line segment102and the second sensing line segment124in the vertical projection direction Z, respectively. In the present embodiment, the data line116partially overlaps with the first sensing line segment102and the second sensing line segment124in the vertical projection direction Z as an example, and when the data line116partially overlaps with the first sensing line segment102and the second sensing line segment124in the vertical projection direction Z, a higher aperture ratio may be provided and a parasitic capacitance may be reduced by a driving method. For example, the data line116, the first sensing line120and the second sensing line130may be inputted with signals of substantially the same voltage, respectively, such that the voltage differences between the data line116and the first sensing line120and second sensing line130are substantially zero to prevent generation of parasitic capacitance. When the data line116does not overlap with the first sensing line segment102and the second sensing line segment124in the vertical projection direction Z, for example, when the first sensing line segment102and the second sensing line segment124are disposed separate from the data line116by a distance, parasitic capacitances between the data line116and the first sensing line120and second sensing line130may be reduced, and thus noise is less likely to be generated.

Referring toFIG. 2,FIG. 3andFIG. 5, the touch display panel1A of the present embodiment may be optionally provided with a first dummy line segment146in a portion of the pixels P of the second region R2. The first dummy line segment146may be in the same conductive-pattern layer (for example, a first conductive-pattern layer) as the first sensing line segment102, and the relative position of the first dummy line segment146to other devices (for example, the insulating layer106) may be substantially similar to that of the first sensing line segment102to other devices, but is not limited thereto. In addition, the first dummy line segment146may be connected to a portion of a third connecting electrode150via a sixth opening148in the insulating layer106, and the common electrode CE at the second region R2is connected to the third connecting electrode150. Similarly, the touch display panel1A also may be selectively provided with a second dummy line segment147in a portion of the pixels P of the fourth region R4. The second dummy line segment147may be in the same conductive-pattern layer (for example, a first conductive-pattern layer) as the second sensing line segment124, and the relative position of the second dummy line segment147to other devices (for example, the insulating layer106) may be substantially similar to that of the second sensing line segment124to other devices, but is not limited thereto.

In addition, the second dummy line segment147may be connected to a portion of a fourth connecting electrode154via a seventh opening152in the insulating layer106, and the common electrode CE at the fourth region R4is connected to the fourth connecting electrode154. It should be noted that, the first dummy line segment146is not connected to the connecting electrode at the boundary of the first group G1and the second group G2, or in other words, the dummy line segments of the first group G1and the second group G2are not connected to each other, and namely are separate from each other. As such, in the present embodiment, the common electrode CE at the second region R2may be connected to the dummy line segment through the connecting electrode in that region, the common electrode CE at the fourth region R4may be connected to the dummy line segment through the connecting electrode in that region, and the dummy line segments may be in the same conductive-pattern layer as the first sensing line segment102, the second sensing line segment124and the scan line114, and have a material of metal, alloy or other suitable materials, or stacks of the aforementioned materials. Thus, the overall resistance of the sensing electrodes may be reduced. The provision of the dummy line segments in the present embodiment is also applicable to other embodiments and alternative embodiments of the present disclosure.

In the touch display panel1A of the present embodiment, since the sensing lines are formed by the sensing line segments and the connecting electrodes, the sensing line segments and the scan line114are in the same conductive-pattern layer, and the connecting electrodes may be in the same conductive-pattern layer as the common electrode CE. In other words, for the touch display panel1A, touch devices may be made together with the architecture of the display panel, and thus an additional conductive layer is not required for making the touch devices, thereby reducing the overall complexity and manufacture cost of the process. Moreover, direct sensing may be performed without active device SW on the sensing lines of the touch display panel1A, whereby an increase in number of the active device SW in the touch display panel1A may be avoided and also the overall complexity and manufacture cost of the process may be reduced. On the other hand, the shape of the sensing lines in the present embodiment may allow the sensing lines to avoid the active device SW, such that the effect of the sensing lines on the active device SW can be reduced; namely, signal interference with the active device SW from the sensing lines is avoided, thereby preventing easy turn-on and uneasy turn-off of the active device SW.

The touch display panel of the present disclosure is not limited to the aforementioned embodiments. The touch display panels according to other preferred embodiments of the present disclosure are sequentially presented below, and for ease of comparison of the embodiments and for simplification of description, similar devices are marked with same reference numbers throughout the embodiments below, and the description is mainly directed to differences of the embodiments and the similar portions are not repeatedly described.

Referring toFIG. 6andFIG. 7,FIG. 6shows an enlarged schematic view of pixels positioned at a first region or a second region according to a first alternative embodiment of the first embodiment of the present disclosure, andFIG. 7shows a schematic cross-sectional view along a cut line B-B′ ofFIG. 6of the array substrate according to the first alternative embodiment of the first embodiment of the present disclosure, wherein the cross-sectional view of the array substrate10ofFIG. 7also shows the corresponding opposite substrate20and the display medium layer30. As shown inFIG. 6andFIG. 7, unlike the first embodiment, the touch display panel1B of the present alternative embodiment further comprises a first auxiliary electrode (or namely first assistant electrode)134disposed below the insulating layer106, and the common electrode CE at the first region R1is connected to the first auxiliary electrode134through the first connecting electrode104, and the first auxiliary electrode134is not connected to any of the active device SW, the scan line114, the data line116, and the second sensing electrode132; namely, the first auxiliary electrode134is separate from the active device SW, the scan line114, the data line116, and the second sensing electrode132.

The first auxiliary electrode134may be disposed between two adjacent first sensing line segments102in the first region R1and the third region R3and partially overlap with the first sensing line segments102in the vertical projection direction Z, the first auxiliary electrode134may at least partially overlap with the first connecting electrode104in the vertical projection direction Z, and the first connecting electrode104may be connected to the first auxiliary electrode134via a third opening138in the insulating layer106. In addition, in other alternative embodiments, the gate dielectric layer105also may be provided with a contact hole (not shown) for exposing a portion of the first sensing line segment102, and the first auxiliary electrode134may be connected to the first sensing line segment102via the contact hole (not shown). However, the present disclosure is not limited thereto. Furthermore, when the first auxiliary electrode134is connected to the first sensing line segment102via the contact hole (not shown), the first connecting electrode104may selectively be connected only to either the first sensing line segment102or the first auxiliary electrode134, and alternatively, the first connecting electrode104may be connected to both the first sensing line segment102and the first auxiliary electrode134. However, the present disclosure is not limited thereto.

On the other hand, the touch display panel1B further comprises a second auxiliary electrode (or namely second assistant electrode)136disposed below the insulating layer106, and the common electrode CE at the third region R3is connected to the second auxiliary electrode136through the second connecting electrode126, and the second auxiliary electrode136is not connected to any of the active device SW, the scan line114, the data line116, and the first sensing electrode122; namely, the second auxiliary electrode136is separate from the active device SW, the scan line114, the data line116, and the first sensing electrode122. The second auxiliary electrode136may be disposed between two adjacent second sensing line segments124in the third region R3and partially overlap with the second sensing line segments124in the vertical projection direction Z, and the second auxiliary electrode136at least partially overlaps with the second connecting electrode126in the vertical projection direction Z. The second connecting electrode126may be connected to the second auxiliary electrode136via a fourth opening140in the insulating layer106. In addition, the relative position of the second auxiliary electrode136to other devices may be the same as that of the first auxiliary electrode134to other devices, as can be referred to inFIG. 6andFIG. 7.

In addition, in other alternative embodiments, the gate dielectric layer105also may be provided with a contact hole (not shown) for exposing a portion of the second sensing line segment124, and the second auxiliary electrode136may be connected to the second sensing line segment124via the contact hole (not shown). However, the present disclosure is not limited thereto. Furthermore, when the second auxiliary electrode136is connected to the second sensing line segment124via the contact hole (not shown), the second connecting electrode126may selectively be connected only to either the second sensing line segment124or the second auxiliary electrode136, and alternatively, the second connecting electrode126may be connected to both the second sensing line segment124and the second auxiliary electrode136. However, the present disclosure is not limited thereto.

In this embodiment, the first auxiliary electrode134, the second auxiliary electrode136and the data line116may be in the same conductive-pattern layer (for example, a second conductive-pattern layer), and the materials thereof may include, for example, metal, alloy or other suitable materials, or stacks of the aforementioned materials, but are not limited thereto. In addition, neither the first auxiliary electrode134nor the second auxiliary electrode136is connected with the data line116; namely, the first auxiliary electrode134, the second auxiliary electrode136and the data line116are separate from each other. In particular, the first auxiliary electrode134and the second auxiliary electrode136are not connected to each other; namely, the first auxiliary electrode134and the second auxiliary electrode136are separate from each other. The first auxiliary electrode134and the data line116are not connected to each other; namely, the first auxiliary electrode134and the data line116are separate from each other. The second auxiliary electrode136and the data line116are not connected to each other; namely, the second auxiliary electrode136and the data line116are separate from each other.

As such, the first sensing line120and the second sensing line130in the present alternative embodiment may be connected to the first auxiliary electrode134and the second auxiliary electrode136respectively, and the materials of the first auxiliary electrode134and the second auxiliary electrode136may be metal, alloy or other suitable materials, or stacks of the aforementioned materials. Thus, the overall resistance of the first sensing line120and the second sensing line130may be further reduced. It is also to be noted that, the data line116in the present alternative embodiment may partially overlap with or not overlap with the first sensing line segment102and the second sensing line segment124in the vertical projection direction Z, respectively, detailed implementation of which may be the same as that of the first embodiment and is not repeatedly described. Furthermore, the remaining features of the touch display panel1B of the present alternative embodiment may be the same as those of the first embodiment (see alsoFIG. 1toFIG. 5), and are not repeatedly described herein.

Referring toFIG. 8andFIG. 9,FIG. 8shows an enlarged schematic view of the pixels positioned at the first region or the second region according to a second alternative embodiment of the first embodiment of the present disclosure, andFIG. 9shows a schematic cross-sectional view along a cut line C-C′ ofFIG. 8of the array substrate according to the second alternative embodiment of the first embodiment of the present disclosure, wherein the cross-sectional view of the array substrate ofFIG. 9also shows the corresponding opposite substrate20and the display medium layer30. As shown inFIG. 8andFIG. 9, this embodiment is different from the first embodiment in that, the first sensing line segment102and the data line116may be in the same conductive-pattern layer (for example, a second conductive-pattern layer), but the first sensing line segment102and the data line116are separate from each other.

In particular, the gate dielectric layer105in this embodiment is disposed on the gate electrode108and the array substrate10, and the first sensing line segment102is disposed on the gate dielectric layer105. The insulating layer106is disposed on the first sensing line segment102, the drain electrode112, the source electrode110, the channel layer107, the gate dielectric layer105, and the pixel electrode PE. The first connecting electrode104and the common electrode CE are disposed on the insulating layer106, and the first connecting electrode104and the common electrode CE may be in the same conductive-pattern layer. Therefore, the first connecting electrode104may be connected to the exposed portion of the first sensing line segment102via the first opening118in the insulating layer106to form the first sensing line120.

On the other hand, the second sensing line segment124and the data line116also may be in the same conductive-pattern layer, but the second sensing line segment124and the data line116are separate from each other, and the second sensing line segment124and the first sensing line segment102are separate from each other. The relative positions of the second sensing line segment124, the second connecting electrode126and other devices may be same as those of the first sensing line segment102, the first connecting electrode104and other devices (see alsoFIG. 8andFIG. 9), and are not repeatedly described. In addition, the scan line114in the present alternative embodiment may partially overlap with or not overlap with the first sensing line segment102and the second sensing line segment124in the vertical projection direction Z, respectively, detailed implementation of which may be similar to the first embodiment and is not repeatedly described. Furthermore, the remaining features of the touch display panel1C of the present alternative embodiment may be the same as those of the first embodiment (see alsoFIG. 1toFIG. 5), and are not repeatedly described.

Referring toFIG. 10andFIG. 11,FIG. 10shows an enlarged schematic view of the pixels positioned at the first region or the second region according to a third alternative embodiment of the first embodiment of the present disclosure, andFIG. 11shows a schematic cross-sectional view along a cut line D-D′ ofFIG. 10of the array substrate according to the third alternative embodiment of the first embodiment of the present disclosure, wherein the cross-sectional view of the array substrate ofFIG. 11also shows the corresponding opposite substrate20and the display medium layer30. As shown inFIG. 10andFIG. 11, unlike the second alternative embodiment, the touch display panel1D of the present alternative embodiment further comprises a first auxiliary electrode (or namely first assistant electrode)134disposed below the insulating layer106, and the common electrode CE at the first region R1is connected to the first auxiliary electrode134through the first connecting electrode104, and the first auxiliary electrode134is not connected to any of the active device SW, the scan line114, the data line116, and the second sensing electrode132; namely, the first auxiliary electrode134is separate from the active device SW, the scan line114, the data line116, and the second sensing electrode132. The first auxiliary electrode134may be disposed between two adjacent first sensing line segments102in the first region R1and the third region R3and partially overlap with the first sensing line segments102in the vertical projection direction Z, the first auxiliary electrode134may at least partially overlap with the first connecting electrode104in the vertical projection direction Z, and the first connecting electrode104may be connected to the first auxiliary electrode134via a third opening138in the insulating layer106and the gate dielectric layer105.

On the other hand, the touch display panel1D further comprises a second auxiliary electrode136disposed below the insulating layer106, and the common electrode CE at the third region R3is connected to the second auxiliary electrode (or namely second assistant electrode)136through the second connecting electrode126, and the second auxiliary electrode136is not connected to any of the active device SW, the scan line114, the data line116, and the first sensing electrode122; namely, the second auxiliary electrode136is separate from the active device SW, the scan line114, the data line116, and the first sensing electrode122. The second auxiliary electrode136may be disposed between two adjacent second sensing line segments124in the third region R3and partially overlap with the second sensing line segments124in the vertical projection direction Z, and the second auxiliary electrode136at least partially overlaps with the second connecting electrode126in the vertical projection direction Z. The second connecting electrode126may be connected to the second auxiliary electrode136via a fourth opening140in the insulating layer106and the gate dielectric layer105. In addition, the relative position of the second auxiliary electrode136to other devices may be the same as that of the first auxiliary electrode134to other devices, as can be referred to inFIG. 10andFIG. 11.

In this embodiment, the first auxiliary electrode134, the second auxiliary electrode136and the scan line114may be in the same conductive-pattern layer (for example, a first conductive-pattern layer), and the materials thereof may include, for example, metal, alloy or other suitable materials, or stacks of the aforementioned materials. In addition, neither the first auxiliary electrode134nor the second auxiliary electrode136is connected with the scan line114; namely, the first auxiliary electrode134, the second auxiliary electrode136and the scan line114are separate from each other. In particular, the first auxiliary electrode134and the second auxiliary electrode136are not connected to each other; namely, the first auxiliary electrode134and the second auxiliary electrode136are separate from each other. The first auxiliary electrode134and the scan line114are not connected to each other; namely, the first auxiliary electrode134and the scan line114are separate from each other. The second auxiliary electrode136and the scan line114are not connected to each other; namely, the second auxiliary electrode136and the scan line114are separate from each other. As such, the first sensing line120and the second sensing line130in the present alternative embodiment may be connected to the first auxiliary electrode134and the second auxiliary electrode136respectively, and the materials of the first auxiliary electrode134and the second auxiliary electrode136may be metal, alloy or other suitable materials, or stacks of the aforementioned materials. Thus, the overall resistance of the first sensing line120and the second sensing line130may be further reduced.

It is also to be noted that, the scan line114in the present alternative embodiment may partially overlap with or not overlap with the first sensing line segment102and the second sensing line segment124in the vertical projection direction Z, respectively, detailed implementation of which may be similar to that of the first embodiment and is not repeatedly described. Furthermore, the remaining features of the touch display panel1D of the this embodiment may be the same as those of the first embodiment and the second alternative embodiment thereof (see alsoFIG. 1-5andFIG. 8-9), and are not repeatedly described herein.

Referring toFIG. 12toFIG. 14,FIG. 12shows an enlarged schematic view of the X region inFIG. 2of the array substrate according to a second embodiment of the present disclosure,FIG. 13shows a schematic cross-sectional view along a cut line E-E′ ofFIG. 12of the array substrate according to the second embodiment of the present disclosure, andFIG. 14shows an enlarged schematic view of the Y region inFIG. 2of the array substrate according to the second embodiment of the present disclosure, wherein the cross-sectional view of the array substrate ofFIG. 13also shows the corresponding opposite substrate20and the display medium layer30. As shown inFIG. 2,FIG. 12andFIG. 13, the touch display panel2A of the present embodiment comprises a plurality of pixels P, a first sensing line120and an insulating layer106. The pixels P are divided into a first group G1and a second group G2, the first group G1has a first region R1and a second region R2, the second group G2comprises a third region R3and a fourth region R4, each of the pixels P comprises an active device SW, a pixel electrode PE and a common electrode CE, the active device SW has a gate electrode108, a source electrode110and a drain electrode112, the gate electrode108is connected to a scan line114, the source electrode110is connected to a data line116, and the drain electrode112is connected to the pixel electrode PE. The first sensing line120is disposed in a portion of the pixels P of the first region R1and extends through a portion of the pixels P of the third region R3.

In the present embodiment, the first sensing line120and the data line116are generally kept at a distance from each other; namely, the first sensing line120and the data line116are separate from each other. In other words, the first sensing line120does not overlap with the data line116in the vertical projection direction Z. The insulating layer106is sandwiched between the first sensing line120and the common electrode CE, and the insulating layer106comprises at least one first opening118for exposing a portion of the first sensing line120, wherein the common electrode CE at the first region R1is connected to the first sensing line120, the common electrode CE at the second region R2is connected to the common electrode CE at the first region R1to form a first sensing electrode122, and the common electrode CE at the second region R2is not directly connected to the first sensing line120; namely, the common electrode CE at the second region R2is connected to the first sensing line120through the common electrode CE at the first region R1. It should be noted that, the present embodiment is different from the first embodiment in that, the first sensing line120does not comprise the first connecting electrode and the first sensing line segment, and instead is directly formed by a conductive-pattern layer.

As shown inFIG. 2,FIG. 13, andFIG. 14, the touch display panel2A of the present embodiment further comprises a second sensing line130disposed in another portion of the pixels P of the third region R3, and the second sensing line130and the data line116are generally kept at a distance from each other; namely, the second sensing line130and the data line116are separate from each other. In other words, the second sensing line130does not overlap with the data line116in the vertical projection direction Z. The insulating layer106is further sandwiched between the common electrode CE and the second sensing line130, and the insulating layer106further comprises at least one second opening128for exposing a portion of the second sensing line130. The relative position of the second sensing line130to the insulating layer106may be the same as that of the first sensing line120to the insulating layer106, as can be referred to inFIG. 13. The common electrode CE at the third region R3is connected to the second sensing line130, for example, through the second opening128in the insulating layer106. The common electrode CE at the fourth region R4is connected to the common electrode CE at the third region R3to form a second sensing electrode132, and the common electrode CE at the fourth region R4is not directly connected to the second sensing line130; namely, the common electrode CE at the fourth region R4is connected to the second sensing line130through the common electrode CE at the third region R3. It should be noted that, the present embodiment is different from the first embodiment in that, the second sensing line130does not comprise the second connecting electrode and the second sensing line segment, and instead is directly formed by a conductive-pattern layer.

In addition, in the present embodiment, the first sensing line120, the second sensing line130and the data line116are in the same conductive-pattern layer (for example, a second conductive-pattern layer), and neither the first sensing line120nor the second sensing line130is connected with the data line116; namely, the first sensing line120, the second sensing line130and the data line116are separate from each other. In particular, the first sensing line120and the second sensing line130may be not connected to each other; namely, the first sensing line120and the second sensing line130are separate from each other. The first sensing line120and the data line116may be not connected to each other; namely, the first sensing line120and the data line116are separate from each other. The second sensing line130and the data line116may be not connected to each other; namely, the second sensing line130and the data line116are separate from each other.

In addition, the first sensing line120and the second sensing line130are each kept at a distance from the data line116, such that neither the first sensing line120nor the second sensing line130overlaps with the data line116in the vertical projection direction Z. In particular, the first sensing line120does not overlap with the second sensing line130in the vertical projection direction Z, the first sensing line120does not overlap with the data line116in the vertical projection direction Z, and the second sensing line130does not overlap with the data line116in the vertical projection direction Z. It is also to be noted that, the active device SW is neither present on the first sensing line120nor on the second sensing line130, or namely the first sensing line120and the second sensing130are both not exist the active device SW. Alternatively, for example, the first sensing line120and the second sensing line130may each be not connected to the active device SW.

For the touch display panel2A of the present embodiment, since the sensing lines may be the in same conductive-pattern layer as the data line116, the touch devices may be made together with the architecture of the display panel, and an additional conductive layer is not required for making the touch devices, thereby reducing the overall complexity and manufacture cost of the process. Moreover, direct sensing may be performed without active device SW on the sensing lines of the touch display panel2A, whereby an increase in number of the active device SW required in the touch display panel2A may be avoided and also the overall complexity and manufacture cost of the process may be reduced.

Referring toFIG. 15andFIG. 16,FIG. 15shows an enlarged schematic view of the pixels positioned at the first region or the second region according to a first alternative embodiment of the second embodiment of the present disclosure, andFIG. 16shows a schematic cross-sectional view along a cut line F-F′ ofFIG. 15of the array substrate according to the first alternative embodiment of the second embodiment of the present disclosure, wherein the cross-sectional view of the array substrate ofFIG. 16also shows the corresponding opposite substrate20and the display medium layer30. As shown inFIG. 15andFIG. 16, the present alternative embodiment is different from the second embodiment in that, the first sensing line120and the scan line114are in the same conductive-pattern layer (for example, a first conductive-pattern layer), and the first sensing line120and the scan line114are not connected to each other; namely, the first sensing line120and the scan line114are separate from each other, and the first sensing line120does not overlap with the scan line114in the vertical projection direction Z. In particular, the first sensing line120and the scan line114are in the same conductive-pattern layer, the insulating layer106and the gate dielectric layer105may be disposed above the first sensing line120, and the common electrode CE may be disposed on the insulating layer106. The insulating layer106comprises at least one first opening118, wherein the first opening118may additionally pass through the gate dielectric layer105to expose a portion of the first sensing line120and enable the common electrode CE to be connected to the first sensing line120. However, the present disclosure is not limited thereto. On the other hand, the second sensing line130also may be in the same conductive-pattern layer (for example, a first conductive-pattern layer) as the scan line114, and the relative position of the second sensing line130to other devices may be the same as that of the first sensing line120to other devices (see alsoFIG. 15andFIG. 16), and is not repeatedly described.

Referring toFIG. 17andFIG. 18,FIG. 17shows an enlarged schematic view of the pixels positioned at the first region according to a third embodiment of the present disclosure, andFIG. 18shows a schematic cross-sectional view along a cut line G-G′ ofFIG. 17of the array substrate according to the third embodiment of the present disclosure, wherein the cross-sectional view of the array substrate ofFIG. 18also shows the corresponding opposite substrate20and the display medium layer30. As shown inFIG. 17andFIG. 18, the present embodiment is different from the first embodiment in that, the pixel electrode PE is located above the common electrode CE, and the touch display panel3additionally comprises a dielectric layer142sandwiched between the pixel electrode PE and the common electrode CE; namely, in the first embodiment, the pixel electrode PE is located below the common electrode CE, and the touch display panel comprises the insulating layer106sandwiched between the pixel electrode PE and the common electrode CE. In particular, the dielectric layer142and the insulating layer106have a fifth opening144, such that the pixel electrode PE can be connected to the drain electrode112.

In addition, materials of the dielectric layer142may include inorganic insulating materials, organic insulating materials, or stacks of the aforementioned materials. The inorganic insulating materials may be for example silicon oxide, silicon nitride, silicon oxynitride, or other suitable materials, or stacks of the aforementioned materials, and the organic insulating materials may be for example acrylic, photoresists, epoxies, or other suitable materials, or stacks of the aforementioned materials. However, the present disclosure is not limited thereto. The remaining features of the touch display panel3of the present embodiment may be the same as those of the first embodiment (see alsoFIG. 2toFIG. 5), and are not repeatedly described. It is also to be noted that, the touch display panel3of the present embodiment is also applicable to the first embodiment, the second embodiment and the alternative embodiments thereof, and this is not repeatedly described herein.

To sum up, for the touch display panels of the present disclosure, since the sensing lines are formed by the sensing line segments and the connecting electrodes, and the sensing line segments may be in the same conductive-pattern layer as the scan line or the data line, the connecting electrodes may be in the same conductive-pattern layer as the common electrode. On the other hand, the sensing lines of the touch display panel of the present disclosure also may be directly formed by the same conductive-pattern layer of the scan line or the data line. In other words, for the touch display panel, the touch devices may be made together with the architecture of the display panel, and thus an additional conductive layer is not required for making the touch devices, thereby reducing the overall complexity and manufacture cost of the process. Furthermore, the sensing lines may additionally be connected to the auxiliary electrodes, such that the overall resistance of the sensing lines may be further reduced. Moreover, direct sensing may be performed without an active device on the sensing lines of the touch display panels, whereby an increase in number of the active device required in the touch display panels may be avoided and also the overall complexity and manufacture cost of the process may be reduced. On the other hand, the shape of the sensing lines can allow the sensing lines to keep from (or keep away from, or avoid) the active device, such that the effect of the sensing lines on the active device can be reduced; namely, signal interference with the active device from the sensing lines that results in easy turn-on and uneasy turn-off of the active device is avoided.

The above description only provides preferred embodiments of the present disclosure, and all equivalent changes and modifications made according to the claims of the present disclosure falls within the scope of the present disclosure.