IN-CELL TOUCH DISPLAY PANEL
The in-cell touch display panel has a display area and a non-display area. Display IC bounding pads and touch pads are disposed in the non-display area. A touch electrode corresponds to more than one pixel structures. A touch sensing line is electrically connected to the touch electrode and one of the touch pads. A data line is electrically connected to a thin film transistor and one of the display pads. At least one of the display pads is disposed between two of the touch pads, and at least one of the touch pads is disposed between two of the display pads.
This application claims priority to China Application Serial Number 201611243632.6 filed Dec. 29, 2016, which is herein incorporated by reference.
BACKGROUND Field of InventionThe present invention relates to a touch display panel. More particularly, the present invention relates to an in-cell touch display panel with a Touch with Display Driver Integrated (TDDI) single chip.
Description of Related ArtThe TDDI single chip is configured to connect all of data lines and touch sensing lines which are connected to touch electrodes, thereby enabling the single chip to control both functions of touch and display. However, the data lines and the touch sensing lines would concentrate toward the chip area in a non-display area, and thus are overlapped with each other. The signals transmitted on the data lines and the touch sensing lines may be interfered by each other, and therefore the functions of display and touch are both affected. It is an issue in the art that how to address the problems of overlapped trace routes and the interference between the data lines and the touch sensing lines in the non-display area.
SUMMARYA perspective of the invention is to provide an in-cell touch display panel, in which traces of conductive lines in the non-display area would not overlap with each other, and thus to reduce the difficulty for disposing touch sensing lines and data lines in the non-display area.
Embodiments of the invention provide an in-cell touch display panel having a display area and a non-display area, and the in-cell touch display panel includes following units. Multiple data lines are disposed on a first substrate along a first direction. Multiple gate lines are disposed along a second direction. An angle is formed between the first direction and the second direction. Multiple touch sensing lines are disposed on the first substrate and are electrically insulated from the data lines and the gate lines. Multiple pixel regions are formed in the display area, and each of the pixel regions is surrounded by one of the gate lines and one of the data lines intersecting with each other. Each of the pixel regions includes a pixel structure, and each of the pixel structures includes a pixel electrode. A common electrode is formed in the display area and includes multiple touch electrodes. Each of the touch electrodes corresponds to more than one of the pixel electrodes, and each of the pixel electrodes corresponds to a sub-common electrode which is a part of the touch electrode. Multiple thin film transistors (TFTs) are formed in the pixel structure, in which each of the thin film transistors includes a gate, a source, a drain and a semiconductor layer. A liquid crystal layer is formed between the first substrate and the second substrate. Multiple display pads and multiple touch sensing pads are disposed in the non-display area. Each of the touch electrodes is electrically connected to at least one of the touch sensing lines, and each of the touch sensing lines is electrically connected to one of the touch pads. Each of the sources is electrically connected to one of the data lines, and each of the data lines is electrically connected to one of the display pads. At least one of the display pads is disposed between two of the touch pads, and at least one of the touch pads is disposed between two of the display pads.
In some embodiments, the data lines are parallel to the touch sensing lines in the display area, and the data lines are not overlapped with the touch sensing lines in the non-display area.
In some embodiments, the data lines are partially overlapped with the touch sensing lines along a normal vector of the first substrate in the display area. The data lines and the touch sensing lines are formed in different metal layers in the display area.
In some embodiments, the data lines are parallel to the touch sensing lines in the display area. The data lines and the touch sensing lines are formed in the same metal layer in the display area.
In some embodiments, at least two of the touch sensing lines are electrically connected with each other and electrically connected to one of the touch pads through a conductive line.
In some embodiments, the number of the touch pads is less than the number of the display pads, the display pads and the touch pads are arranged as multiple rows, and one of the rows includes at least part of the touch pads.
In some embodiments, the display pads are disposed between the touch pads and the display area.
In some embodiments, the touch pads are disposed between the display pads and the display area.
In some embodiments, the number of the touch pads is less than the number of the display pads, and the display pads and the touch pads are arranged as multiple rows. A first row of these rows only includes a portion of the display pads, and a second row of these rows includes a portion of the display pads and a portion of the touch pads.
In some embodiments, the first row is disposed between the display area and the second row.
In some embodiments, the second row is disposed between the display area and the first row.
In some embodiments, the in-cell touch display panel further includes a driving circuit disposed in the non-display area and electrically connected to the display pads and the touch pads. In a display period, the driving circuit transmits pixel data to the pixel electrodes through the data lines and the TFTs. In a touch period, the driving circuit generates a touch sensing signal according to a voltage variation from one of the touch electrodes.
In some embodiments, the in-cell touch display panel further includes: a first metal layer formed on the first substrate, in which the first metal layer includes the gates; a first insulation layer formed on the first metal layer; the semiconductor layer formed on the first insulation layer; a second metal layer formed on the semiconductor layer, in which the second metal layer includes the sources and the drains; a first transparent conductive layer formed on the first insulation layer, in which the first transparent conductive layer includes the pixel electrodes; a second insulation layer formed on the second metal layer and on the first transparent conductive layer; a third metal layer formed on the second insulation layer, in which the touch sensing lines are formed in the third metal layer in the display area; a third insulation layer formed on the third metal layer and having a contact hole to expose one of the touch sensing lines; and a second transparent conductive layer formed on the third insulation layer, in which the second transparent conductive layer includes the sub-common electrodes. In the display area, one of the sub-common electrodes is electrically connected to one of the touch sensing lines through the contact hole.
In some embodiments, the in-cell touch display panel further includes: a first metal layer formed on the first substrate, in which the first metal layer includes the gates; a first insulation layer formed on the first metal layer; the semiconductor layer formed on the first insulation layer; a second metal layer formed on the semiconductor layer, in which the second metal layer includes the sources and the drains; a first transparent conductive layer formed on the first insulation layer, in which the first transparent conductive layer includes the sub-common electrodes; a second insulation layer formed on the second metal layer and the first transparent conductive layer, and a contact hole is formed in the first transparent conductive layer; a third metal layer formed on the second insulation layer, in which the touch sensing lines are formed in the third metal layer in the display area, and one of the sub-common electrodes is electrically connected to one of the touch sensing lines through the contact hole; a third insulation layer formed on the second insulation layer and the third metal layer; and a second transparent conductive layer formed on the third insulation layer, in which the second transparent conductive layer includes the pixel electrodes.
In some embodiments, the in-cell touch display panel further includes: a first metal layer formed on the first substrate, in which the first metal layer includes the gates; a first insulation layer formed on the first metal layer; the semiconductor layer formed on the first insulation layer; a second metal layer formed on the semiconductor layer, in which the second metal layer includes the sources and the drains; a second insulation layer formed on the second metal layer, in which the second insulation layer has a first contact hole; a first transparent conductive layer formed on the second insulation layer, in which the first transparent conductive layer includes the sub-common electrodes; a third insulation layer formed on the first transparent conductive layer, and having a second contact hole and a third contact hole, in which the second contact hole is corresponding to the first contact hole; a third metal layer formed on the third insulation layer, in which the touch sensing lines are formed in the third metal layer in the display area, and one of the touch sensing lines is electrically connected to one of the sub-common electrodes through the third contact hole; and a second transparent conductive layer formed on the third insulation layer, in which the second transparent conductive layer includes the pixel electrodes, and one of the pixel electrodes is electrically connected to one of the drains through the second contact hole and the first contact hole. The second transparent conductive layer covers the touch sensing lines, and projections of one of the touch sensing lines and one of the data lines onto the first substrate at least partially overlap with each other.
In some embodiments, each of the pixel structures in the display area further includes: a first metal layer formed on the first substrate, in which the first metal layer includes the gates; a first insulation layer formed on the first metal layer; the semiconductor layer formed on the first insulation layer, in which the semiconductor layer is a metal oxide including Indium, gallium and zinc; a second insulation layer formed on the semiconductor layer, in which the second insulation layer has a first contact hole and a second contact hole; a first transparent conductive layer formed on the second insulation layer, in which the first transparent conductive layer includes one of the pixel electrodes; a second metal layer formed on the second insulation layer to form one of the sources, one of the drains and one of the touch sensing lines, in which the one of sources and the one of the drains are electrically connected to the semiconductor layer through the first contact hole and the second contact hole respectively, in which the one of the drains is electrically to the one of pixel electrodes; a third insulation layer formed on the second metal layer and having a third contact hole; and a second transparent conductive layer formed on the third insulation layer, in which the second transparent conductive layer includes one of the touch electrodes, and the one of the touch sensing lines is electrically connected to the one of touch electrodes through the third contact hole.
In some embodiments, each of the pixel structures in the display area further includes: the semiconductor layer formed on the first substrate, in which the semiconductor layer includes one of the sources, a first lightly doped region, a channel region of one of the TFTs, a second lightly doped region and one of the drains, in which the channel region is formed between the first lightly doped region and the second lightly doped region; a first insulation layer formed on the semiconductor layer, in which the first insulation layer has a first contact hole to expose the one of the sources, and a second contact hole to expose the one of the drains; a first metal layer formed on the first insulation layer, in which the first metal layer includes one of the gates; a second insulation layer formed on the first metal layer, in which the second insulation layer has a third contact hole corresponding to the first contact hole, and a fourth contact hole corresponding to the second contact hole; a first transparent conductive layer formed on the second insulation layer, in which the first transparent conductive layer includes one of the pixel electrodes; a second metal layer formed on the second insulation layer, in which the data lines and the touch sensing lines are formed in the second metal layer in the display area, one of the data lines is electrically connected to the one of the sources through the third contact hole and the first contact hole, in which the second metal layer includes a filling structure electrically connected to the one of pixel electrodes, and is electrically connected to the one of the drains through the fourth contact hole and the second contact hole; a third insulation layer formed on the second metal layer, in which the third insulation layer has a fifth contact hole to expose one of the touch sensing lines; and a second transparent conductive layer formed on the third insulation layer, in which the second transparent conductive layer includes the sub-common electrodes, and the second transparent conductive layer is electrically connected to the one of the touch sensing lines through the fifth contact hole.
In some embodiments, the in-cell touch display panel further includes: a first metal layer formed on the first substrate, in which the first metal layer includes the gates; a first insulation layer formed on the first metal layer; the semiconductor layer formed on the first insulation layer; a first transparent conductive layer formed on the first insulation layer, in which the first transparent conductive layer includes the pixel electrodes; a second metal layer formed on the semiconductor layer, in which the second metal layer includes the sources and the drains, the touch sensing lines and the data lines are formed in the second metal layer in the display area, and one the touch sensing lines is disposed between two of the data lines; a second insulation layer formed on the second metal layer and on the first transparent conductive layer, in which the second insulation layer includes a first contact hole to expose one of the touch sensing lines; a third insulation layer formed on the second insulation layer, and having a second contact hole corresponding to the first contact hole; and a second transparent conductive layer formed on the third insulation layer and is electrically connected to the one of the touch sensing lines through the second contact hole and the first contact hole, in which the second transparent conductive layer includes the sub-common electrodes.
In some embodiments, the non-display area includes a signal line transfer area and a fan-out area. The signal line transfer area is located between the display area and the fan-out area. The touch pads and the display pads are disposed in the fan-out area. One of the touch sensing lines includes a first part and a second part, the first part is formed in a first metal layer, and the second part is formed in a third metal layer. The in-cell touch display panel further includes a connection structure disposed in the signal line transfer area and coupled to the first part and the second part. The connection structure includes: the first part; the second part; multiple insulation layers, having multiple openings to expose the first part and the second part; and a transparent conductive layer, electrically connected to the first part and the second part through the openings.
In some embodiments, the first part is formed in a first metal layer, and the second part is formed in a second metal layer. The in-cell touch display panel further includes a connection structure disposed in the signal line transfer area and coupled to the first part and the second part. The connection structure includes: the first part; the second part; multiple insulation layers, having multiple openings to expose the first part and the second part; and a transparent conductive layer electrically connected to the first part and the second part through the openings.
Compared with prior art, the invention has advantages of: the touch sensing lines and the data lines in the non-display area would not overlap with each other, and thus the difficulty for disposing the touch sensing lines and the data lines in the non-display area is decreased.
The invention can be more fully understood by reading the following detailed description of the embodiment, with reference made to the accompanying drawings as follows.
FIG. 5B_1 is a top view of pixel structure in accordance with another embodiment.
FIG. 5B_2 is a top view of multiple pixel structures in accordance with another embodiment.
The using of “first”, “second”, “third”, etc. in the specification should be understood for identifying units or data described by the same terminology, but are not referred to particular order or sequence. In addition, the term “couple” used in the specification should be understood for electrically connecting two units directly or indirectly. In other words, when “a first object is coupled to a second object” is written in the specification, it means another object may be disposed between the first object and the second object.
The in-cell touch display panel 100 has a display area 101 and a non-display area 102. The non-display area 102 includes a signal line transfer area 103 and a fan-out area 104. The display area 101 is described first. The display area 101 includes: pixel structures P11-P14, P21-P24, P31-P34 and P41-P44 (the regions where gate lines and data lines intersect and surround); gate lines G1-G4 extending along an X direction (also referred to a first direction); data lines D1-D4 extending along a Y direction (also referred to a second direction), and touch sensing lines S1-S4 extending along the Y direction. A common electrode is formed in the display area and patterned to form multiple touch electrodes. Each touch electrode corresponds to more than one pixel structure, and each pixel structure includes a pixel electrode corresponding to a sub-common electrode. Each pixel structure includes a thin film transistor (TFT). Each of the data lines D1-D4 is electrically connected to the source of the TFT in the corresponding pixel structure, and each of the gate lines G1-G4 is electrically connected to the gate of the TFT in the corresponding pixel structure. For example, the pixel structure P11 includes a TFT T1 which has a gate T1G and a source T1S. The gate line G1 is electrically connected to the gate T1G, and the data line D1 is electrically connected to the source T1S. In addition, each touch electrode is electrically connected to one touch sensing line through a contact hole ch. For example, the pixel structures P11-P14 share a touch electrode C11 which is electrically connected to the touch sensing line S1; the pixel structures P21-P24 share a touch electrode C12 which is electrically connected to the touch sensing line S3; the pixel structures P31-P34 share a touch electrode C21 which is electrically connected to the touch sensing line S2; and the pixel structures P44-P44 share a touch electrode C22 which is electrically connected to the touch sensing line S4.
A period of a frame is at least divided into one or more display periods and one or more touch periods. During the display period, a common voltage is applied to the touch electrodes C11, C12, C21, and C22, and the voltage on the gate lines G1-G4 are configured to turn on the TFTs in the corresponding pixel structures sequentially, and the driving circuit 110 transmits pixel data to the pixel electrodes in the corresponding pixel structures through the data lines D1-D4 in order to set grey levels of pixels. During the touch period, the touch electrodes C11, C12, C21, and C22 are taken for detecting touch operations performed on the in-cell touch display panel 100, and the driving circuit 110 generates a touch sensing signal according to the voltage variation on the touch electrodes C11, C12, C21, and C22. In other words, the spatial resolution of the touch function depends on the number of the touch electrodes, the spatial resolution of the display function depends on the number of the pixels, and thus the resolution of the touch function is less than the resolution of the display function.
The signal line transfer area 103 is located between the display area 101 and the fan-out area 104. In the signal line transfer area 103, the data lines D1-D4 and the touch sensing lines S1-S4 may be transferred to other metal layers. For example, the touch sensing lines S1-S4 are in a third or second metal in the display area 101, but are transferred to a first metal layer in the fan-out area 104. Multiple connection structures are disposed in the signal line transfer area 103 for transferring the touch sensing lines S1-S4 from the third or second metal layer to the first metal layer. The embodiment of the connection structure would be described in detail below. In addition, a protection circuit and a transparent or opaque conductive layer may be disposed in the signal line transfer area 103 to prevent the in-cell touch display panel 100 from be damaged by static discharge. In some embodiments, the width of the signal line transfer area 103 is essentially equal to width of half pixel to one pixel, which is not limited in the invention.
A driving circuit 110 is disposed in the fan-out area 104 on the in-cell touch display panel 100. The driving circuit 110 may be disposed on a flexible circuit board such as tape carrier package (TCP) or chip on film (COF), or the driving circuit 110 may be disposed on the TFT substrate. The driving circuit 110 is electrically connected to display pads 121-124 and touch pads 131-134 which are disposed on the in-cell touch display panel 100. The display pads 121-124 are electrically connected to the data lines D1-D4 respectively, and the touch pads 131-134 are electrically connected to the touch sensing lines S1-S4 respectively. In particular, along the X direction, one of the display pads is disposed between two of the touch pads, and one of the touch pads is disposed between two of the display pads. For example, the display pad 122 is disposed between the touch pad 131 and the touch pad 132, and the touch pad 131 is disposed between the display pad 121 and the display pad 122. In the embodiment of
Every four pixel structures share one touch electrode In
In another embodiment, three touch sensing lines corresponding to the same touch electrode may be electrically connected to pixel strictures in different rows. For example, the touch sensing line S1 may be electrically connected to the pixel structure at the first row and the first column corresponding to the touch electrode C11; the touch sensing line S2 may be electrically connected to the pixel structure at the second row and the second column corresponding to the touch electrode C11; and the touch sensing line S3 may be electrically connected to the pixel structure at the third row and third column corresponding to the touch electrode C11. The touch sensing line S4 may be electrically connected to the pixel structure at the first row and the fourth column corresponding to the touch electrode C21; the touch sensing line S5 may be electrically connected to the pixel structure at the second row and the fifth column corresponding to the touch electrode C21; and the touch sensing line S6 may be electrically connected to the pixel structure at the third row and the sixth column corresponding to the touch electrode C21. The touch sensing line S7 may be electrically connected to the pixel structure at the first row and the seventh column corresponding to the touch electrode C31; the touch sensing line S8 may be electrically connected to the pixel structure at the second row and the eighth column corresponding to the touch electrode C31; and the touch sensing line S9 may be electrically connected to the pixel structure at the third row and the ninth column corresponding to the touch electrode C31.
In addition, each pixel structure has at least a data line, and each data line is connected to one display pad. In other words, the number of the display pads is more than the number of touch pads. In the embodiment of
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In
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In the embodiments of
The sub-common electrode COM is disposed above the pixel electrode PE in the embodiment of
To be specific, referring to FIG. 5B_1,
In the embodiment of FIG. 5B_1, the metal connection structure 535 is formed in the third metal layer M3, but it may be formed in the first metal layer M1 in other embodiments. For example, referring to
On the other hand, referring to FIG. 5B_2 and
In the embodiments of
In the embodiments above, the channel region of TFT is amorphous silicon (a-si), but the channel region of TFT may be polysilicon or indium gallium zinc oxide (IGZO). For example, referring to
On the other hand, referring to
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In the embodiment of
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On the other hand, in the embodiment of
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From another aspect, in the embodiments of
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In addition, in some embodiments, the touch sensing lines are formed in the second metal layer in the display area, and therefore the connection structure 610 may be used to transfer the second metal layer to the first metal layer. For example, referring to
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Embodiments of
In the embodiment of
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The signal line transfer area 103 exists in the embodiments above, and the connection structure therein is used to transfer the data lines/touch sensing lines to different metal layers. However, in some embodiments, if the resolution requirement of the panel is relatively lower, then the function of the connection structure may be implemented in the touch pads and/or display pads.
The self-conductive capacitance is used for sensing in the in-cell touch display panel in the specification. That is, a transmitter (TX) sensing signal and a receiver (RC) sensing signal is transmitted to the touch electrodes and the touch pads through the touch sensing lines. The metal layer in the specification may be a single layer of metal including aluminum, copper, titanium, tungsten, etc. or a composite metal layer including molybdenum/aluminum/molybdenum, titanium/aluminum titanium, titanium/copper/titanium, which is not limited in the invention. On the other hand, the insulation layer in the specification may be silicon nitride, silicon oxide, silicon oxynitride or other suitable insulation layer. In addition, a single insulation layer in the figures may include more than one stacked insulation layers with different material. Moreover, some of the contact holes or openings have vertical sidewalls, and some of the contact holes or openings have tapered sidewalls, but it should be appreciated that all contact holes of openings have tapered sidewalls in practice. The figures are just for schematic illustration. When “contact hole to expose” is described, it means to partially expose the component beneath or to completely expose the component beneath, which is not limited in the invention.
Herein, examples are provided to describe the method for manufacturing the in-cell touch display panel.
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Although the present invention has been described in considerable detail with reference to certain embodiments thereof, other embodiments are possible. Therefore, the spirit and scope of the appended claims should not be limited to the description of the embodiments contained herein. It will be apparent to those skilled in the art that various modifications and variations can be made to the structure of the present invention without departing from the scope or spirit of the invention. In view of the foregoing, it is intended that the present invention cover modifications and variations of this invention provided they fall within the scope of the following claims.
Claims
1. An in-cell touch display panel having a display area and a non-display area, wherein the in-cell touch display panel comprises:
- a first substrate;
- a plurality of data lines disposed on the first substrate along a first direction;
- a plurality of gate lines disposed along a second direction, wherein an angle is formed between the first direction and the second direction;
- a plurality of touch sensing lines disposed on the first substrate and electrically insulated from the data lines and the gate lines;
- a plurality of pixel regions formed in the display area surrounded by the gate lines and the data lines intersecting with each other, wherein each of the pixel regions comprises a pixel structure, and each of the pixel structures comprises a pixel electrode;
- a common electrode comprising a plurality of touch electrodes, wherein each of the touch electrodes corresponds to more than one of the pixel electrodes, and each of the pixel electrodes corresponds to a sub-common electrode which is a part of the touch electrode;
- a plurality of thin film transistors (TFTs) formed in the pixel structures, wherein each of the thin film transistors comprises a gate, a source, a drain and a semiconductor layer;
- a second substrate, wherein a liquid crystal layer is formed between the first substrate and the second substrate; and
- a plurality of display pads and a plurality of touch pads, the display pads and the touch pads being disposed in the non-display area, wherein
- each of the touch electrodes is electrically connected to at least one of the touch sensing lines, and each of the touch sensing lines is electrically connected to one of the touch pads;
- each of the sources is electrically connected to one of the data lines, and each of the data lines is electrically connected to one of the display pads; and
- at least one of the display pads is disposed between two of the touch pads, and at least one of the touch pads is disposed between two of the display pads.
2. The in-cell touch display panel of claim 1, wherein the data lines are parallel to the touch sensing lines in the display area, and the data lines are not overlapped with the touch sensing lines in the non-display area.
3. The in-cell touch display panel of claim 1, wherein the data lines are partially overlapped with the touch sensing lines along a normal vector of the first substrate in the display area; and
- the data lines and the touch sensing lines are formed in different metal layers in the display area.
4. The in-cell touch display panel of claim 1, wherein the data lines are parallel to the touch sensing lines in the display area; and
- the data lines and the touch sensing lines are formed in a same metal layer in the display area.
5. The in-cell touch display panel of claim 1, wherein at least two of the touch sensing lines are electrically connected to each other and to one of the touch pads through a conductive line.
6. The in-cell touch display panel of claim 1, wherein a number of the touch pads is less than a number of the display pads, the display pads and the touch pads are arranged as a plurality of rows, and one of the rows comprises at least part of the touch pads.
7. The in-cell touch display panel of claim 1, wherein the display pads are disposed between the touch pads and the display area.
8. The in-cell touch display panel of claim 1, wherein the touch pads are disposed between the display pads and the display area.
9. The in-cell touch display panel of claim 1, wherein a number of the touch pads is less than a number of the display pads, the display pads and the touch pads are arranged as a plurality of rows, wherein a first row of the rows only comprises a portion of the display pads, and a second row of the rows comprises a portion of the display pads and a portion of the touch pads.
10. The in-cell touch display panel of claim 9, wherein the first row is disposed between the display area and the second row.
11. The in-cell touch display panel of claim 9, wherein the second row is disposed between the display area and the first row.
12. The in-cell touch display panel of claim 1, further comprising a driving circuit disposed in the non-display area and electrically connected to the display pads and the touch pads, wherein
- in a display period, the driving circuit transmits pixel data to the pixel electrodes through the data lines and the TFTs; and
- in a touch period, the driving circuit generates a touch sensing signal according to a voltage on one of the touch electrodes.
13. The in-cell touch display panel of claim 1, further comprising:
- a first metal layer formed on the first substrate, wherein the first metal layer comprises the gates;
- a first insulation layer formed on the first metal layer;
- the semiconductor layer formed on the first insulation layer;
- a second metal layer formed on the semiconductor layer, wherein the second metal layer comprises the sources and the drains;
- a first transparent conductive layer formed on the first insulation layer, wherein the first transparent conductive layer comprises the pixel electrodes;
- a second insulation layer formed on the second metal layer and on the first transparent conductive layer;
- a third metal layer formed on the second insulation layer and comprising the touch sensing lines in the display area;
- a third insulation layer formed on the third metal layer and having a contact hole to expose one of the touch sensing lines; and
- a second transparent conductive layer formed on the third insulation layer, wherein the second transparent conductive layer comprises the sub-common electrodes,
- wherein in the display area, one of the sub-common electrodes is electrically connected to the one of the touch sensing lines through the contact hole.
14. The in-cell touch display panel of claim 1, further comprising:
- a first metal layer formed on the first substrate, wherein the first metal layer comprises the gates;
- a first insulation layer formed on the first metal layer;
- the semiconductor layer formed on the first insulation layer;
- a second metal layer formed on the semiconductor layer, wherein the second metal layer comprises the sources and the drains;
- a first transparent conductive layer formed on the first insulation layer, wherein the first transparent conductive layer comprises the sub-common electrodes;
- a second insulation layer formed on the second metal layer and the first transparent conductive layer, and having a contact hole;
- a third metal layer formed on the second insulation layer, wherein the touch sensing lines are formed in the third metal layer in the display area, and one of the sub-common electrodes is electrically connected to one of the touch sensing lines through the contact hole;
- a third insulation layer formed on the second insulation layer and the third metal layer; and
- a second transparent conductive layer formed on the third insulation layer, wherein the second transparent conductive layer comprises the pixel electrodes.
15. The in-cell touch display panel of claim 1, further comprising:
- a first metal layer formed on the first substrate, wherein the first metal layer comprises the gates;
- a first insulation layer formed on the first metal layer;
- the semiconductor layer formed on the first insulation layer;
- a second metal layer formed on the semiconductor layer, wherein the second metal layer comprises the sources and the drains;
- a second insulation layer formed on the second metal layer, wherein the second insulation layer has a first contact hole;
- a first transparent conductive layer formed on the second insulation layer, wherein the first transparent conductive layer comprises the sub-common electrodes;
- a third insulation layer formed on the first transparent conductive layer, and having a second contact hole and a third contact hole, wherein the second contact hole is corresponding to the first contact hole;
- a third metal layer formed on the third insulation layer, wherein the touch sensing lines are formed in the third metal layer in the display area, and one of the touch sensing lines is electrically connected to one of the sub-common electrodes through the third contact hole; and
- a second transparent conductive layer formed on the third insulation layer, wherein the second transparent conductive layer comprises the pixel electrodes, and one of the pixel electrodes is electrically connected to one of the drains through the second contact hole and the first contact hole,
- wherein the second transparent conductive layer covers the touch sensing lines, and projections of one of the touch sensing lines and one of the data lines onto the first substrate at least partially overlap with each other.
16. The in-cell touch display panel of claim 1, wherein each of the pixel structures in the display area further comprises:
- a first metal layer formed on the first substrate, wherein the first metal layer comprises the gates;
- a first insulation layer formed on the first metal layer;
- the semiconductor layer formed on the first insulation layer, wherein the semiconductor layer is a metal oxide comprising Indium, gallium and zinc;
- a second insulation layer formed on the semiconductor layer, wherein the second insulation layer has a first contact hole and a second contact hole;
- a first transparent conductive layer formed on the second insulation layer, wherein the first transparent conductive layer comprises one of the pixel electrodes;
- a second metal layer formed on the second insulation layer to form one of the sources, one of the drains and one of the touch sensing lines, wherein the one of sources and the one of the drains are electrically connected to the semiconductor layer through the first contact hole and the second contact hole respectively, wherein the one of the drains is electrically to the one of pixel electrodes;
- a third insulation layer formed on the second metal layer and having a third contact hole; and
- a second transparent conductive layer formed on the third insulation layer, wherein the second transparent conductive layer comprises one of the touch electrodes, and the one of the touch sensing lines is electrically connected to the one of touch electrodes through the third contact hole.
17. The in-cell touch display panel of claim 1, wherein each of the pixel structures in the display area further comprises:
- the semiconductor layer formed on the first substrate, wherein the semiconductor layer comprises one of the sources, a first lightly doped region, a channel region of one of the TFTs, a second lightly doped region and one of the drains, wherein the channel region is formed between the first lightly doped region and the second lightly doped region;
- a first insulation layer formed on the semiconductor layer, wherein the first insulation layer has a first contact hole to expose the one of the sources, and a second contact hole to expose the one of the drains;
- a first metal layer formed on the first insulation layer, wherein the first metal layer comprises one of the gates;
- a second insulation layer formed on the first metal layer, wherein the second insulation layer has a third contact hole corresponding to the first contact hole, and a fourth contact hole corresponding to the second contact hole;
- a first transparent conductive layer formed on the second insulation layer, wherein the first transparent conductive layer comprises one of the pixel electrodes;
- a second metal layer formed on the second insulation layer, wherein the data lines and the touch sensing lines are formed in the second metal layer in the display area, one of the data lines is electrically connected to the one of the sources through the third contact hole and the first contact hole, wherein the second metal layer comprises a filling structure electrically connected to the one of pixel electrodes, and is electrically connected to the one of the drains through the fourth contact hole and the second contact hole;
- a third insulation layer formed on the second metal layer, wherein the third insulation layer has a fifth contact hole to expose one of the touch sensing lines; and
- a second transparent conductive layer formed on the third insulation layer, wherein the second transparent conductive layer comprises the sub-common electrodes, and the second transparent conductive layer is electrically connected to the one of the touch sensing lines through the fifth contact hole.
18. The in-cell touch display panel of claim 1, further comprising:
- a first metal layer formed on the first substrate, wherein the first metal layer comprises the gates;
- a first insulation layer formed on the first metal layer;
- the semiconductor layer formed on the first insulation layer;
- a first transparent conductive layer formed on the first insulation layer, wherein the first transparent conductive layer comprises the pixel electrodes;
- a second metal layer formed on the semiconductor layer, wherein the second metal layer comprises the sources and the drains, the touch sensing lines and the data lines are formed in the second metal layer in the display area, and one the touch sensing lines is disposed between two of the data lines;
- a second insulation layer formed on the second metal layer and on the first transparent conductive layer, wherein the second insulation layer comprises a first contact hole to expose one of the touch sensing lines;
- a third insulation layer formed on the second insulation layer, and having a second contact hole corresponding to the first contact hole; and
- a second transparent conductive layer formed on the third insulation layer and is electrically connected to the one of the touch sensing lines through the second contact hole and the first contact hole, wherein the second transparent conductive layer comprises the sub-common electrodes.
19. The in-cell touch display panel of claim 1, wherein the non-display area comprises a signal line transfer area and a fan-out area, the signal line transfer area is located between the display area and the fan-out area, the touch pads and the display pads are disposed in the fan-out area, one of the touch sensing lines comprises a first part and a second part, the first part is formed in a first metal layer, the second part is formed in a third metal layer, and the in-cell touch display panel further comprises:
- a connection structure disposed in the signal line transfer area and coupled to the first part and the second part, wherein the connection structure comprises:
- the first part;
- the second part;
- a plurality of insulation layers having a plurality of openings to expose the first part and the second part; and
- a transparent conductive layer electrically connected to the first part and the second part through the openings.
20. The in-cell touch display panel of claim 1, wherein the non-display area further comprises a signal line transfer area and a fan-out area, the signal line transfer area is located between the display area and the fan-out area, the touch pads and the display pads are disposed in the fan-out area, one of the touch sensing lines comprises a first part and a second part, the first part is formed in a first metal layer, the second part is formed in a second metal layer, and the in-cell touch display panel further comprises:
- a connection structure disposed in the signal line transfer area and coupled to the first part and the second part, wherein the connection structure comprises:
- the first part;
- the second part;
- a plurality of insulation layers, having a plurality of openings to expose the first part and the second part; and
- a transparent conductive layer electrically connected to the first part and the second part through the openings.
Type: Application
Filed: Nov 9, 2017
Publication Date: Jul 5, 2018
Patent Grant number: 10495928
Inventor: Cheng-Yen YEH (Taichung City)
Application Number: 15/808,867