TWI587036B - In-cell touch panel - Google Patents

Description

In-line touch panel

The present invention relates to a touch panel, and more particularly to an in-cell touch panel capable of having good electrical properties (RC loading).

In general, a capacitive touch panel can be roughly divided into several different types according to the laminated structure, for example, an in-cell capacitive touch panel and an On-cell capacitive touch. panel.

Please refer to FIG. 1 and FIG. 2 . FIG. 1 and FIG. 2 are schematic diagrams showing the laminated structure of the in-cell capacitive touch panel and the On-Cell capacitive touch panel. As shown in FIG. 1 , the stacked structure 1 of the On-Cell capacitive touch panel is sequentially from bottom to top: a substrate 10, a thin film transistor (TFT) device layer 11, a liquid crystal layer 12, a color filter layer 13, The glass layer 14, the touch sensing layer 15, the polarizer 16, the adhesive 17, and the overlying lens 18. As shown in FIG. 2, the laminated structure 2 of the in-cell capacitive touch panel is sequentially from bottom to top: a substrate 20, a thin film transistor (TFT) device layer 21, a touch sensing layer 22, a liquid crystal layer 23, The color filter layer 24, the glass layer 25, the polarizer 26, the adhesive 27, and the overlying lens 28.

Comparing Figure 1 with Figure 2, it can be seen that the embedded capacitive touch panel is The touch sensing layer 22 is disposed under the liquid crystal layer 23, that is, disposed in the liquid crystal display module; the On-Cell capacitive touch panel is disposed above the glass layer 14 by the touch sensing layer 15 That is, it is disposed outside the liquid crystal display module. Compared with the traditional one-piece glass touch panel (OGS) and On-Cell capacitive touch panel, the in-line capacitive touch panel can achieve the thinnest touch panel design. It can be widely used in portable electronic products such as mobile phones, tablet computers and notebook computers.

Therefore, the present invention provides an in-cell touch panel, and it is desired to reduce the influence of resistance and parasitic capacitance through its innovative layout to enhance the overall performance of the in-cell touch panel.

A preferred embodiment of the present invention is an in-cell touch panel. In this embodiment, the in-cell touch panel includes a plurality of pixels. The stacked structure of each pixel includes a substrate, a thin film transistor element layer, a liquid crystal layer, a color filter layer, and a glass layer. The thin film transistor element layer is disposed on the substrate. A first conductive layer and a common voltage electrode are disposed in the thin film transistor element layer. The first conductive layers are arranged in a grid shape. The liquid crystal layer is disposed above the thin film transistor element layer. The color filter layer is disposed above the liquid crystal layer. The glass layer is disposed above the color filter layer.

In one embodiment, the in-cell touch panel is an in-cell self-capacitive touch panel, and the plurality of touch sensing electrodes of the in-cell self-capacitive touch panel are mesh-shaped. An array of first conductive layers is formed.

In an embodiment, the first conductive layer and the common voltage electrode are separated from each other by an insulating layer.

In one embodiment, the plurality of touch sensing electrodes are disconnected and spaced apart by a specific distance.

In one embodiment, the specific distance is in units of pixels (Pixel) or sub-pixels (Sub-pixel).

In one embodiment, the first conductive layer that is not part of the touch sensing electrode is electrically connected to the common voltage electrode through the via (Via).

In an embodiment, the first conductive layer is formed after the common voltage electrode.

In one embodiment, the first conductive layer is formed before the common voltage electrode.

In one embodiment, the color filter layer comprises a color filter and a black matrix resist. The black matrix photoresist has good light shielding properties, and the first conductive layer is located in the black matrix light. Below the resistance.

In one embodiment, the first conductive layer overlaps the source line within the thin film transistor element layer.

In one embodiment, the touch mode and the display mode of the in-cell touch panel are time-divisionally driven, and the in-cell touch panel operates in the touch mode by using a blanking interval of the display period.

In an embodiment, when the in-cell touch panel operates on the display mode In the formula, the common voltage electrode is maintained at a direct current (DC) voltage, an alternating current (AC) voltage, and the plurality of touch sensing electrodes are maintained at a direct current voltage, an alternating voltage, a voltage associated with the common voltage electrode, or exhibit a floating connection ( Floating) status.

In one embodiment, the common voltage electrode has a single common voltage electrode region and overlaps with the plurality of touch sensing electrodes. When the embedded touch panel operates in the touch mode, the plurality of touch senses The measuring electrode applies a touch sensing signal and the common voltage electrode applies a touch-related signal of the same frequency, same-sense or in-phase as the touch sensing signal.

In one embodiment, the common voltage electrode has a single common voltage electrode region and overlaps with the plurality of touch sensing electrodes. When the embedded touch panel operates in the touch mode, the plurality of touch sensing The electrode system applies a touch sensing signal and the common voltage electrode is disconnected from the signal source or assumes a floating state.

In one embodiment, the common voltage electrode has a plurality of common voltage electrode regions respectively overlapping the plurality of touch sensing electrodes. When the in-cell touch panel operates in the touch mode, the plurality of touch sensing electrodes Applying a plurality of touch sensing signals sequentially, and the plurality of common voltage electrodes sequentially apply a plurality of touch-related signals in the same frequency, same-sense, or in-phase as the plurality of touch sensing signals, or The plurality of common voltage electrodes are sequentially disconnected from the signal source or in a floating state.

In an embodiment, the common voltage electrode has a single common voltage electrode region and overlaps with the plurality of touch sensing electrodes, and is embedded. When the touch panel operates in the touch mode, the plurality of touch sensing electrodes apply a touch sensing signal and the source line or the gate line in the thin film transistor layer Apply touch-sensitive signals of the same frequency, same-sense or in-phase as the touch sensing signals.

In one embodiment, the common voltage electrode has a plurality of common voltage electrode regions respectively overlapping the plurality of touch sensing electrodes. When the in-cell touch panel operates in the touch mode, the plurality of touch sensing electrodes A plurality of touch sensing signals are sequentially applied, and a source line or a gate line in the layer of the thin film transistor component is sequentially applied and the plurality of touch sensing signals are sequentially applied. A plurality of touch-related signals of the same frequency, same-width or in-phase.

In one embodiment, a second conductive layer is further disposed in the thin film transistor element layer, and the second conductive layer is electrically connected to the first conductive layer.

In one embodiment, the second conductive layer is formed simultaneously with the source line and the drain line in the thin film transistor element layer.

In an embodiment, the second conductive layer and the first conductive layer are overlapped and connected to each other.

In one embodiment, the second conductive layer forms a cross-bridge structure through a via to cross the first conductive layer.

In an embodiment, when the stacked structure has a Half Source Driving (HSD) architecture, the stacked structure additionally has a space of a source line and is electrically connected to the first conductive layer. The second conductive layer uses the space of the extra vacant source line as the trace of the touch electrode.

In one embodiment, the second conductive layer that is not used as the touch trace or the signal line is electrically connected to the first conductive layer that is not used as the touch sensing electrode, and is electrically connected through the via hole. The voltage electrodes are electrically connected to further increase the conductivity of the common voltage electrode.

In an embodiment, the touch mode of the in-cell touch panel and the driving mode of the display mode at least partially overlap.

In one embodiment, when the in-cell touch panel operates in the touch mode, the plurality of touch sensing electrodes apply a touch sensing signal, and the common voltage electrode or source line can be used for a part of the time. The floating state is presented and the touch-sensitive signal of the same frequency, the same or the same phase as the touch sensing signal is applied for another part of the time.

Compared with the prior art, the in-cell touch panel and its layout according to the present invention have the following advantages:

(1) The laminated structure is simple, easy to produce and reduce cost.

(2) The design of the touch electrode, the common voltage electrode and the trace thereof is simple.

(3) Effectively reduce the optical impact on the LCD touch panel through a new layout.

(4) Effectively reduce the resistance and capacitance load of the common voltage electrode itself (RC Loading).

(5) Simultaneously controlling the common voltage electrode during touch actuation to greatly reduce the overall resistance and capacitance load of the touch panel.

The advantages and spirit of the present invention will be further understood from the following detailed description of the invention.

1, 2, 3A ~ 3D, 7A‧‧‧ laminated structure

10, 20, 30, 70‧‧‧ substrates

11, 21, 31, 71‧‧ ‧ thin film transistor component layer

12, 23, 32, 72‧‧‧ liquid crystal layer

13, 24, 33, 73‧‧‧ color filter layer

14, 25, 34, 74‧‧ ‧ glass layer

15, 22‧‧‧ touch sensing layer

16, 26‧‧‧ polarizers

17, 27‧‧‧Binders

18, 28‧‧‧Overlying lens

CF‧‧‧ color filters

BM‧‧‧ Black Matrix Resistor

M2, M3‧‧‧ conductive layer

CITO‧‧‧Common voltage electrode

PITO‧‧‧Pixel Indium Tin Oxide

VIA‧‧‧through hole

LC‧‧‧Liquid Crystal Unit

ISO‧‧‧Insulation

S, S1~S3‧‧‧ source line

D‧‧‧汲极线

G, G1~G3‧‧‧ gate line

TP1, TP2, TP‧‧‧ embedded self-capacitive touch panel

TE, TE1~TE3‧‧‧ touch sensing electrodes

VCOM, VCOM1~VCOM3‧‧‧ common voltage electrode area

TS1~TS3‧‧‧ touch sensing signal

1 and 2 are schematic diagrams showing a laminated structure of an in-cell capacitive touch panel and an On-Cell capacitive touch panel, respectively.

3A to 3D are schematic diagrams showing a laminated structure of an in-cell self-capacitive touch panel according to different embodiments of the present invention.

4A is a schematic diagram showing a touch sensing electrode of an in-cell self-capacitive touch panel and a trace thereof.

FIG. 4B is a schematic diagram showing the first conductive layer that is not part of the touch sensing electrode electrically connected to the common voltage electrode through the through hole.

FIG. 5A is a schematic diagram showing a common voltage electrode having a single common voltage electrode region and overlapping with both the first touch sensing electrode and the third touch sensing electrode.

5B to FIG. 5D are timing diagrams of respective signals of the in-cell self-capacitive touch panel in the display mode and the touch mode in different embodiments.

6A is a schematic diagram showing that the common voltage electrode has a first common voltage electrode region to a third common voltage electrode region overlapping with the first touch sensing electrode to the third touch sensing electrode, respectively.

FIG. 6B is a timing diagram of the signals of the in-cell self-capacitive touch panel of FIG. 6A in the display mode and the touch mode.

FIG. 7A is a schematic diagram showing the second conductive layer electrically connected to the first conductive layer through the through hole in the stacked structure of the in-cell self-capacitive touch panel.

7B is a schematic diagram of the second conductive layer and the first conductive layer in the laminated structure of the in-cell self-capacitive touch panel electrically connected through the through hole, and then electrically connected to the common voltage electrode via the through hole. schematic diagram.

FIG. 7C illustrates an embodiment of a pixel design of an in-cell self-capacitance touch panel.

FIG. 8 illustrates that the touch traces and the signal lines formed by the second conductive layer in the in-cell self-capacitance touch panel are spaced apart from each other, and different sensing electrodes are formed across the through-holes through the touch traces. Schematic diagram of the bridge connection.

9A to 9C are schematic views respectively showing touch sensing electrodes having different shapes formed by grid-shaped first conductive layers.

According to a preferred embodiment of the present invention, an in-cell capacitive touch panel is provided. In fact, because the in-cell capacitive touch panel can achieve the thinnest touch panel design, it can be widely used in various portable consumer electronic products such as smart phones, tablets and notebook computers.

In this embodiment, the display of the in-cell capacitive touch panel may be an In-Plane-Switching Liquid Crystal (IPS) or a boundary electric field extending therefrom to switch the wide viewing angle technology ( Fringe Field Switching (FFS) or Advanced Hyper-Viewing Angle (AHVA) display, But not limited to this.

In general, the mainstream capacitive touch sensing technology currently on the market should be a projected capacitive touch sensing technology, which can be divided into Mutual capacitance and Self capacitance. Mutual-capacitive touch sensing technology is a phenomenon in which capacitive coupling occurs between two adjacent electrodes when a touch occurs, and the occurrence of a touch action is determined by a change in capacitance; a self-capacitive touch sensing technology is a touch A capacitive coupling is generated between the object and the electrode, and the capacitance change of the electrode is measured to determine the occurrence of a touch action.

It should be noted that the in-cell capacitive touch panel in this embodiment may adopt a self-capacitive touch sensing technology, and the plurality of touch sensing electrodes are arranged by a first conductive layer arranged in a grid shape. Forming and reducing the influence of the in-cell touch elements on the electrical and optical effects of the LCD by layout.

Next, the laminated structure of the in-cell self-capacitive touch panel of this embodiment will be described in detail.

As shown in FIG. 3A, in an embodiment, the stacked structure 3A of each pixel of the in-cell self-capacitive touch panel may be sequentially included from bottom to top: a substrate 30, a thin film transistor element layer 31, and a liquid crystal layer. 32. A color filter layer 33 and a glass layer 34.

The thin film transistor element layer 31 is disposed on the substrate 30. A first conductive layer M3 and a common voltage electrode CITO are disposed in the thin film transistor element layer 31. The first conductive layers 31 are arranged in a grid shape. The liquid crystal layer 32 includes a plurality of liquid crystal cells LC and is disposed above the thin film transistor element layer 31. Color filter layer 33 setting Above the liquid crystal layer 32. The glass layer 34 is disposed above the color filter layer 33.

Actually, the first conductive layer M3 may be composed of metal or any other conductive material, and the common voltage electrode CITO may be composed of an indium tin oxide layer, and is not particularly limited.

The color filter layer 33 includes a color filter CF and a black matrix photoresist (Black Matrix Resist) BM. The black matrix photoresist BM has good light shielding properties and can be applied to the color filter layer 33. Medium is used as a material for color filters of three colors of red (R), green (G), and blue (B). In this embodiment, the grid-shaped first conductive layer M3 is located below the black matrix photoresist BM and is shielded by the black matrix photoresist BM.

It should be noted that, in the stacked structure 3A illustrated in FIG. 3A, the first conductive layer M3 is formed after the common voltage electrode CITO, and the first conductive layer M3 and the common voltage electrode CITO are transmitted through the insulating layer ISO. The separation is such that the first conductive layer M3 is not electrically connected to the common voltage electrode CITO located under it.

In another embodiment, in the stacked structure 3B illustrated in FIG. 3B, the first conductive layer M3 is also formed after the common voltage electrode CITO, and the first conductive layer M3 and the common voltage electrode CITO are transmitted through the insulating layer. The ISOs are separated from each other, but the first conductive layer M3 is electrically connected to the common voltage electrode CITO located underneath through a via VIA.

In addition, in the stacked structure 3C illustrated in FIG. 3C, the first conductive layer M3 is formed before the common voltage electrode CITO, and the first conductive layer M3 The common voltage electrode CITO is separated from each other by the insulating layer ISO so that the common voltage electrode CITO is not electrically connected to the first conductive layer M3 located under it.

In another embodiment, in the stacked structure 3D illustrated in FIG. 3D, the first conductive layer M3 is also formed before the common voltage electrode CITO, and the first conductive layer M3 and the common voltage electrode CITO are transmitted through the insulating layer. The ISOs are separated from each other, but the common voltage electrode CITO is electrically connected to the first conductive layer M3 located underneath through a via VIA.

Then, as shown in FIG. 4A, a plurality of touch sensing electrodes TE on the in-cell self-capacitive touch panel TP1 are formed by a grid-shaped first conductive layer M3, and the plurality of touch sensing electrodes are formed. The electrodes TE are not connected and are separated by a certain distance. The plurality of touch sensing electrodes TE are not connected to the common voltage electrode CITO. In fact, the above specific distance may be in units of pixels (Pixel) or sub-pixels, but is not limited thereto.

In addition, as shown in FIG. 4B, in the in-cell self-capacitive touch panel TP2, the first conductive layer M3, which is not part of the touch sensing electrode TE, can be electrically connected to the common voltage electrode CITO through the via VIA. Take the trace of the common voltage electrode CITO. It should be noted that although the touch sensing electrode TE is also formed by the first conductive layer M3 in FIG. 4B, the first conductive layer M3 as the touch sensing electrode TE and its trace does not share the common voltage electrode CITO. The first conductive layer M3, which is not electrically connected to the touch sensing electrode TE, is electrically connected to the common voltage electrode CITO through the via VIA as a trace of the common voltage electrode CITO.

Then, referring to FIG. 5A, in the in-cell self-capacitive touch panel TP, the first conductive layer M3 arranged in a grid shape forms the first touch sensing electrode TE1 to the third touch sensing electrode TE3, respectively. The common voltage electrode CITP has a single common voltage electrode region VCOM and overlaps both the first touch sensing electrode TE1 and the third touch sensing electrode TE3, but the first touch sensing electrode TE1 to the third touch sensing The electrode TE3 is not electrically connected to the common voltage electrode CITO. The first conductive layer M3, which is not part of the touch sensing electrode, can be electrically connected to the common voltage electrode CITO through the via VIA as a common voltage electrode CITO trace and respectively located at the first touch sensing electrode TE1~ The third touch sensing electrode TE3 is between.

It should be noted that the touch mode and the display mode of the embedded self-capacitive touch panel TP of the present invention can adopt the time-division driving mode and operate in the touch mode by using the blanking interval of the display period. , but not limited to this. In practical applications, the touch mode of the embedded self-capacitive touch panel TP of the present invention and the driving time of the display mode may also overlap at least partially.

In one embodiment, as shown in FIG. 5B, when the in-cell self-capacitive touch panel TP operates in the display mode, a single common voltage electrode region VCOM can be maintained at a direct current (DC) voltage or an alternating current (AC) voltage. The first touch sensing electrode TE1 to the third touch sensing electrode TE3 can be maintained at a DC voltage, an AC voltage, a voltage associated with a single common voltage electrode region VCOM, or assume a floating state. When the embedded self-capacitive touch panel TP is in the touch mode, the first touch sensing electrode TE1 to the third touch sensing electrode TE3 are respectively The touch sensing signals TS1~TS3 are applied and a single common voltage electrode region VCOM is applied with touch-sensitive signals of the same frequency, same-sense or in-phase as the touch sensing signals TS1~TS3.

In another embodiment, as shown in FIG. 5C, when the in-cell self-capacitive touch panel TP is in the touch mode, the first touch sensing electrode TE1 to the third touch sensing electrode TE3 are respectively The touch sensing signals TS1~TS3 are applied, but the single common voltage electrode region VCOM is disconnected from the signal source or assumes a floating state.

In another embodiment, as shown in FIG. 5D, when the in-cell self-capacitance touch panel TP is in the touch mode, the first touch sensing electrode TE1 to the third touch sensing electrode TE3 are respectively The touch sensing signals TS1~TS3 are applied, but the source lines S1~S3 or the gate lines G1~G3 in the thin film transistor layer are applied in the same frequency, same plane or in phase with the touch sensing signals TS1~TS3. Touch related signals.

In addition to the above embodiments, the common voltage electrode CITO may have a plurality of common voltage electrode regions respectively overlapping with different touch sensing electrodes.

Referring to FIG. 6A, the common voltage electrode CITO has a first common voltage electrode region VCOM1 to a third common voltage electrode region VCOM3, and the first common voltage electrode region VCOM1 to the third common voltage electrode region VCOM3 are respectively coupled to the first touch sensing. The electrodes TE1 to the third touch sensing electrodes TE3 overlap.

When the embedded self-capacitive touch panel TP is in the touch mode, the first touch sensing electrodes TE1 to the third touch sensing electrodes TE3 are sequentially applied. The first touch sensing signal TX1 to the third touch sensing signal TX3 and the first common voltage electrode region VCOM1 to the third common voltage electrode region VCOM3 are sequentially applied to the first touch sensing signal TX1~ The third touch sensing signal TX3 has a plurality of touch-related signals of the same frequency, same-width or in-phase. In another embodiment, the first common voltage electrode region VCOM1 to the third common voltage electrode region VCOM3 may also be sequentially disconnected from the signal source or assume a floating state.

It should be noted that, in practical applications, when the embedded self-capacitive touch panel TP operates in the touch mode, a single common voltage electrode region VCOM, a first common voltage electrode region VCOM1 to a third common voltage electrode region VCOM3 Or the source line can display a floating state for a part of the time and a touch-sensitive signal of the same frequency, the same or the same phase as the touch sensing signal for another part of the time, and there is no specific limit.

As shown in FIG. 7A, in another embodiment, in the laminated structure 7A of the in-cell self-capacitive touch panel, the second conductive layer M2 is further disposed in the thin film transistor element layer 71, and the second conductive layer is disposed. The layer M2 is electrically connected to the first conductive layer M3 through the via VIA. In fact, the second conductive layer M2 may be formed simultaneously with the source line S and the drain line D in the thin film transistor element layer 71, and the first conductive layer M3 may be connected to the source line S in the thin film transistor element layer 71. Overlap, but not limited to this. FIG. 7C illustrates an embodiment of a pixel design of an in-cell self-capacitance touch panel, but is not limited thereto.

In practical applications, the second conductive layer M2 and the first conductive layer M3 The second conductive layer M2 may be formed across the first conductive layer M3 through the via hole VIA, but is not limited thereto.

In practical applications, if the laminated structure of the embedded self-capacitive touch panel has a Half Source Driving (HSD) architecture, the laminated structure will additionally have a space of a source line, and The second conductive layer M2 electrically connected to the first conductive layer M3 can use the space of the additional source line S as the trace of the touch electrode TE, but is not limited thereto.

In this embodiment, as shown in FIG. 8 , the touch trace M2 (Touch) formed by the second conductive layer M2 and the signal line M2 (Data) are spaced apart from each other, so the number of the second conductive layer M2 is reduced to the original. Half of it. The second conductive layer M2 and the first conductive layer M3 can be completely overlapped, and the different sensing electrodes TE can be connected to each other through the through-hole VIA through the touch-line M2 (Touch). The area covered by the touch sensing electrodes TE formed by the arranged first conductive layer M3 is increased, thereby reducing the area of the dead zone of the touch sensing, so that the embedded self-capacitive touch panel The area of the effective touch sensing area of the TP also increases.

It should be noted that the signal control of the common voltage electrode CITO and the source line S and the gate line G in the touch sensing of this embodiment may be the same as any of the foregoing embodiments, and is not particularly limited. In addition, the first conductive layer M3, which is not used as the touch sensing electrode, can be electrically connected to the common voltage electrode CITO through the via VIA as in the previous embodiment to increase the conductivity of the common voltage electrode CITO. In addition, as shown in FIG. 7B, it is not used as the second guide of the touch trace or the signal line. The electrical layer M2 can also be electrically connected to the first conductive layer M3, which is not used as the touch sensing electrode, via VIA, and electrically connected to the common voltage electrode CITO via the via VIA, thereby further increasing the conductivity of the common voltage electrode CITO.

Referring to FIG. 9A to FIG. 9C , the shape of the touch sensing electrode TE formed by the first conductive layer M3 arranged in a grid shape is not limited to a conventional rectangular shape or a square shape. In practical applications, the touch feeling is limited. The shape of the measuring electrode TE may also be a triangle (as shown in FIG. 9A), a hexagon (as shown in FIG. 9B), a circular shape (as shown in FIG. 9C), or any other geometric shape, and is not particularly limited.

Compared with the prior art, the in-cell touch panel and its layout according to the present invention have the following advantages:

(1) The laminated structure is simple, easy to produce and reduce cost.

(2) The design of the touch electrode, the common voltage electrode and the trace thereof is simple.

(3) Effectively reduce the optical impact on the LCD touch panel through a new layout.

(4) Effectively reduce the resistance and capacitance load of the common voltage electrode itself (RC Loading).

(5) Simultaneously controlling the common voltage electrode during touch actuation to greatly reduce the overall resistance and capacitance load of the touch panel.

The features and spirit of the present invention will be more apparent from the detailed description of the preferred embodiments. Instead, its purpose is It is intended that the various modifications and equivalents may be included within the scope of the invention as claimed.

7A‧‧‧Laminated structure

70‧‧‧Substrate

71‧‧‧Thin-film transistor component layer

72‧‧‧Liquid layer

73‧‧‧Color filter layer

74‧‧‧ glass layer

M3‧‧‧first conductive layer

M2‧‧‧Second conductive layer

CITO‧‧‧Common voltage electrode

LC‧‧‧Liquid Crystal Unit

VIA‧‧‧through hole

G‧‧‧ gate line

S‧‧‧ source line

D‧‧‧汲极线

Claims (24)

An in-cell touch panel is an in-cell self-capacitive touch panel, the in-cell touch panel includes: a plurality of pixels (Pixel), and one of the stacked structures of each pixel includes a substrate; a thin film transistor element layer disposed on the substrate, the first layer of the transistor layer is provided with a first conductive layer (M3) and a common voltage electrode (Common Electrode), wherein the first conductive layer Aligning in a mesh type; a liquid crystal layer disposed above the thin film transistor element layer; a color filter layer disposed over the liquid crystal layer; and a glass layer disposed on the color filter layer The second conductive layer (M2) is further disposed in the thin film transistor element layer, and the second conductive layer is electrically connected to the first conductive layer. The in-cell touch panel of claim 1, wherein the plurality of touch sensing electrodes of the in-cell touch panel are formed by the first conductive layer arranged in a grid pattern. The in-cell touch panel of claim 2, wherein the first conductive layer and the common voltage electrode are separated from each other by an insulating layer. The in-cell touch panel of claim 2, wherein the plurality of touch sensing electrodes are not connected and spaced apart by a specific distance. The in-cell touch panel of claim 4, wherein the specific distance is in units of pixels or sub-pixels. The in-cell touch panel as described in claim 2 of the patent application, wherein The first conductive layer that is part of the touch sensing electrode is electrically connected to the common voltage electrode through a via (Via). The in-cell touch panel of claim 1, wherein the first conductive layer is formed after the common voltage electrode. The in-cell touch panel of claim 1, wherein the first conductive layer is formed before the common voltage electrode. The in-cell touch panel of claim 1, wherein the color filter layer comprises a color filter and a black matrix resist (Black Matrix Resist), the black matrix resist With good light shielding, the first conductive layer is located below the black matrix photoresist. The in-cell touch panel of claim 1, wherein the first conductive layer overlaps with a source line in the thin film transistor element layer. The in-cell touch panel of claim 2, wherein one touch mode and one display mode of the in-cell touch panel are time-divisionally driven, and the in-cell touch panel utilizes display One of the cycles, the blanking interval, operates in the touch mode. The in-cell touch panel of claim 11, wherein when the in-cell touch panel operates in the display mode, the common voltage electrode is maintained at a direct current (DC) voltage, alternating current (AC) The voltage and the plurality of touch sensing electrodes are maintained at a DC voltage, an AC voltage, a voltage associated with the common voltage electrode, or in a floating state. The in-cell touch panel of claim 11, wherein the common voltage electrode has a single common voltage electrode region and the complex The plurality of touch sensing electrodes are overlapped. When the in-cell touch panel is operated in the touch mode, the plurality of touch sensing electrodes apply a touch sensing signal and the common voltage electrode is applied The touch sensing signal is related to one of the same frequency, the same or the same phase. The in-cell touch panel of claim 11, wherein the common voltage electrode has a single common voltage electrode region and overlaps the plurality of touch sensing electrodes, and the in-cell touch panel When operating in the touch mode, the plurality of touch sensing electrodes apply a touch sensing signal and the common voltage electrode is disconnected from the signal source or assumes a floating state. The in-cell touch panel of claim 11, wherein the common voltage electrode has a plurality of common voltage electrode regions respectively overlapping the plurality of touch sensing electrodes, and the in-cell touch panel operates In the touch mode, the plurality of touch sensing electrodes sequentially apply a plurality of touch sensing signals, and the plurality of common voltage electrodes are sequentially applied in the same manner as the plurality of touch sensing signals. The plurality of touch-related signals of the frequency, the same or the same phase, or the plurality of common voltage electrodes are sequentially disconnected from the signal source or in a floating state. The in-cell touch panel of claim 11, wherein the common voltage electrode has a single common voltage electrode region and overlaps the plurality of touch sensing electrodes, and the in-cell touch panel When operating in the touch mode, the plurality of touch sensing electrodes apply a touch sensing signal and a source line or a gate line in the thin film transistor layer. A touch-sensitive signal is applied to one of the same frequency, the same or the same phase as the touch sensing signal. The in-cell touch panel of claim 11, wherein the common voltage electrode has a plurality of common voltage electrode regions respectively overlapping the plurality of touch sensing electrodes, and the in-cell touch panel operates In the touch mode, the plurality of touch sensing electrodes sequentially apply a plurality of touch sensing signals, and one source line or one gate line in the thin film transistor layer ( The gate line is sequentially applied with a plurality of touch-related signals of the same frequency, same-width or in-phase as the plurality of touch sensing signals. The in-cell touch panel of claim 11, wherein the plurality of touch sensing electrodes apply a touch sensing signal when the in-cell touch panel operates in the touch mode The common voltage electrode or the source line can be in a floating state for a part of the time and a touch-sensitive signal of the same frequency, the same or the same phase as the touch sensing signal is applied at another part of the time. . The in-cell touch panel of claim 1, wherein the second conductive layer is formed simultaneously with one source line and one drain line of the thin film transistor element layer. The in-cell touch panel of claim 1, wherein the second conductive layer and the first conductive layer are overlapped and connected to each other. The in-cell touch panel of claim 1, wherein the second conductive layer forms a bridge structure across the first conductive layer through a through hole. The in-cell touch panel of claim 1, wherein when the laminated structure has a half source driving (HSD) architecture, the laminated structure additionally has a source Line space, and with The second conductive layer electrically connected to the first conductive layer utilizes an extra space of the source line that is vacated as a trace of the touch electrode. The in-cell touch panel of claim 1, wherein the second conductive layer that is not used as the touch trace or the signal line passes through the first conductive layer that is not used as the touch sensing electrode. The hole is electrically connected, and is electrically connected to the common voltage electrode via the through hole to further increase the conductivity of the common voltage electrode. The in-cell touch panel of claim 2, wherein the touch mode of one of the in-cell touch panels overlaps at least partially with the driving time of a display mode.