TWI611322B - In-cell touch panel - Google Patents

Abstract

The invention discloses an in-cell touch panel comprising a plurality of pixels. A laminated structure of each pixel comprises a substrate, a thin film transistor element layer, a liquid crystal layer, a color filter layer, a glass layer and a second conductive 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 component 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. The second conductive layer is disposed above the glass layer.

Description

In-line touch panel

The present invention relates to a touch panel, and more particularly to an in-cell touch panel.

Please refer to FIG. 1. FIG. 1 is a schematic diagram showing a laminated structure of a conventional capacitive touch panel having an On-Cell laminated structure. As shown in FIG. 1 , the stacked structure 1 of the conventional 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, and 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 can be seen from FIG. 1 , the conventional capacitive touch panel having the On-Cell laminated structure has the touch sensing layer 15 disposed above the glass layer 14 , that is, disposed outside the liquid crystal display module. Although the thickness of the traditional capacitive touch panel with On-Cell laminate structure is thinner than that of the one-piece glass touch panel (One Glass Solution, OGS), it is portable in today's mobile phones, tablets and notebook computers. The emphasis on thin and light electronic products, the traditional capacitive touch panel with On-Cell laminated structure has reached its limit, can not meet the needs of the thinnest touch panel design.

In view of this, the present invention provides an in-cell touch panel to effectively solve the above problems encountered in the prior art.

An embodiment of the present invention is an in-cell touch panel. to In this embodiment, the in-cell touch panel includes a plurality of pixels. A laminated structure of each pixel comprises a substrate, a thin film transistor element layer, a liquid crystal layer, a color filter layer, a glass layer and a second conductive 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 component 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. The second conductive layer is disposed above the glass layer.

In one embodiment, the in-cell touch panel is an in-line Mutual Capacitance touch panel. The touch electrode of the in-cell mutual-capacitive touch panel includes a first direction electrode and a second direction electrode, wherein the first direction electrode is formed by a grid-shaped first conductive layer and the second direction electrode is A second conductive layer is formed.

In an embodiment, the second conductive layer is composed of a transparent conductive material.

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 resist has good light shielding, and the first conductive layer is located in black. Below the matrix photoresist.

In one embodiment, the thin film transistor component layer further includes an original conductive layer, and the original conductive layer is electrically connected to the common voltage electrode to serve as a common voltage electrode trace and reduce the resistance and capacitance load of the common voltage electrode ( RC loading).

In one embodiment, the first direction electrode and the second direction electrode are respectively a driving electrode (TX) and a sensing electrode (RX) or the first direction electrode and the second direction electrode are respectively a sensing electrode (RX) and a driving electrode. (TX).

In an embodiment, the area division of the touch electrodes is determined according to the connection or disconnection of the first conductive layer.

In one embodiment, the first conductive layer that is not formed in the first direction electrode is electrically connected to the common voltage electrode to serve as a common voltage electrode trace and reduce the RC loading of the common voltage electrode.

In one embodiment, the first conductive layer that is not formed in the first direction electrode is disposed in a vacant area between the touch electrodes to be electrically connected to the common voltage electrode.

In one embodiment, one of the gate and the other of the thin film transistor elements are adjacent to each other on the same side of the pixel.

In one embodiment, the other side of the pixel is provided with one of the first conductive layer or the thin film transistor element layer that is not formed in the first direction electrode and is electrically connected to the common voltage electrode. As a common voltage electrode trace and reduce the RC load of the common voltage electrode.

In one embodiment, when the stacked structure has a Half Source Driving (HSD) architecture, the stacked structure additionally leaves a space for a source line.

In one embodiment, one of the original conductive layers of the thin film transistor element layer is electrically connected to the first conductive layer by using a space of the extra vacant source line to serve as a trace of the first directional electrode.

In one embodiment, the thin film transistor component layer further includes an original conductive layer, and the original conductive layer is electrically connected to the common voltage electrode by using a space of the extra vacant source line to serve as a common voltage electrode. Line and reduce the RC loading of the common voltage electrode.

In one embodiment, a dummy electrode is disposed between the second direction electrodes formed by the second conductive layer, and the dummy electrode is in a floating state.

In an embodiment, when the in-cell touch panel operates in a touch mode, the common voltage electrode is switched to a floating state or a touch-related signal is applied.

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

In an embodiment, the blank interval includes at least one of a Vertical Blanking Interval (VBI), a Horizontal Blanking Interval (HBI), and a Long Horizontal Blanking Interval. The length of the long horizontal blank interval is equal to or greater than the length of the horizontal blank interval, and the long horizontal blank interval is a redistribution of a plurality of horizontal blank intervals or the long horizontal blank interval includes a vertical blank interval.

In one embodiment, the common voltage electrode has a plurality of common voltage electrode regions respectively overlapping with a plurality of touch sensing electrodes of the in-cell touch panel. When the in-cell touch panel is operated in the touch mode, the plurality of touch sensing electrodes sequentially apply a plurality of touch sensing signals and the common voltage electrodes are sequentially applied and the plurality of touch sensing signals are sequentially applied. A plurality of touch-related signals of the same frequency, the same or the same phase, or a common voltage electrode system is in a floating state.

In one embodiment, the common voltage electrode has a single common voltage electrode region and overlaps with a plurality of touch sensing electrodes of the in-cell touch panel. When in-cell touch When the panel is in the touch mode, the plurality of touch sensing electrodes apply a touch sensing signal and the common voltage electrode applies a touch-sensitive signal of the same frequency, the same or the same phase as the touch sensing signal, or It is a common voltage electrode system that exhibits a floating state.

Compared with the prior art, the in-cell touch panel according to the present invention has the following advantages and effects:

(1) The design of the touch sensing electrode and its routing is simple.

(2) The layout method does not affect the original aperture ratio of the in-cell touch panel.

(3) Reduce the RC loading of the common voltage electrode itself.

(4) When the in-cell touch panel operates in the touch mode, the common voltage electrode is simultaneously controlled to reduce the overall resistance and capacitance load of the in-cell touch panel.

(5) Time-division driving of the touch mode and the display mode to improve the signal-to-noise ratio (SNR).

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

20‧‧‧Common voltage electrode

21, 81‧‧‧ first direction electrode

22, 82‧‧‧second direction electrode

VIA‧‧‧through hole

3, 4, 5, 6‧‧‧ laminated structure

30, 40, 50, 60‧‧‧ substrates

31, 41, 51, 61‧‧ ‧ thin film transistor component layer

32, 42, 52, 62‧‧‧ liquid crystal layer

33, 43, 53, 63‧‧‧ color filter layers

34, 44, 54, 64‧‧ ‧ glass layer

35, 45, 55, 65‧‧‧ second conductive layer

310, 410, 510, 610, 710‧‧‧ first conductive layer

312, 412, 512, 612, 712‧‧‧ common voltage electrodes

314, 414, 514, 614, 714‧‧‧ conductive layers

330, 430, 530, 630‧‧‧ black matrix photoresist

332, 432, 532, 632‧‧‧ color filters

LC‧‧‧Liquid Crystal Unit

G‧‧‧ gate

S‧‧‧ source

D‧‧‧汲

3A~3C, 4A~4C, 5A~5C, 6A~6C, 7A~7C‧‧‧

83‧‧‧Dummy electrode

SIM‧‧‧ video signal

HSync‧‧‧ horizontal sync signal

VSync‧‧‧ vertical sync signal

STH‧‧‧ touch drive signal

VBI‧‧‧ vertical blank interval

HBI‧‧‧ horizontal blank

LHBI‧‧‧Long horizontal blank

VCOM‧‧‧Common voltage electrode

VCOM1~VCOM3‧‧‧Common voltage electrode area

TX1~TX3‧‧‧Touch sensing electrode

TR‧‧‧Wiring

G1~G3‧‧‧ gate drive signal

S1~S3‧‧‧ source drive signal

STX1~STX3‧‧‧ touch sensing signal

SVCOM1~SVCOM3, SVCOM‧‧‧ touch related signals

FIG. 1 is a schematic view showing a laminated structure of a conventional capacitive touch panel having an On-Cell laminated structure.

2 is a schematic diagram of a touch electrode layout of an in-cell mutual-capacitive touch panel according to an embodiment of the invention.

3A is a cross-sectional view showing a first embodiment of a laminated structure of an in-cell mutual-capacitive touch panel of the present invention; and FIG. 3B is a schematic view showing a pixel design thereof.

4A is a stacked structure of an in-cell mutual-capacitive touch panel of the present invention. A schematic cross-sectional view of a second embodiment; FIG. 4B is a schematic diagram of a pixel design.

5A is a cross-sectional view showing a third embodiment of a laminated structure of an in-cell mutual-capacitive touch panel of the present invention; and FIG. 5B is a schematic view showing a pixel design thereof.

6A is a cross-sectional view showing a fourth embodiment of a laminated structure of an in-cell mutual-capacitive touch panel of the present invention; and FIG. 6B is a schematic view showing a pixel design thereof.

FIG. 7 is a schematic diagram showing a pixel design when the stacked structure of the in-cell mutual-capacitive touch panel has a half-source driving structure.

8A and 8B are schematic diagrams respectively showing different distribution patterns of touch electrodes of the in-cell mutual-capacitive touch panel.

FIG. 9 is a schematic view showing a dummy electrode disposed between the second directional electrodes formed by the second conductive layer.

FIG. 10A is a schematic diagram showing that the in-cell mutual-capacitive touch panel outputs a touch driving signal in a blank interval in the image signal to operate in the touch mode; FIG. 10B shows a vertical blank interval, a horizontal blank interval, and a long length. Schematic diagram of the horizontal blank interval.

11A is a schematic diagram showing a common voltage electrode in an in-cell mutual-capacitive touch panel having a plurality of common voltage electrode regions overlapping with a plurality of touch sensing electrodes; FIG. 11B is a diagram showing an in-line mutual capacitance contact. When the control panel is in the touch mode, the plurality of touch sensing electrodes sequentially apply a plurality of touch sensing signals, and the plurality of common voltage electrode regions of the common voltage electrode are sequentially applied and the plurality of touch sensing signals are sequentially applied. A timing diagram of a plurality of touch-related signals of the same frequency, the same or the same phase; FIG. 11C shows that when the embedded mutual-capacitive touch panel operates in the touch mode, a plurality of touch sensing electrodes are sequentially applied. A timing diagram in which a plurality of touch sensing signals and a plurality of common voltage electrode regions of the common voltage electrode are in a floating state.

12A is a schematic diagram showing a common voltage electrode in an in-cell mutual-capacitive touch panel having a single common voltage electrode region and overlapping with a plurality of touch sensing electrodes of the in-cell mutual-capacitive touch panel; FIG. 12B When the in-cell mutual-capacitive touch panel is operated in the touch mode, the plurality of touch sensing electrodes sequentially apply a plurality of touch sensing signals and the common voltage electrodes are applied with the plurality of touch sensing signals. Timing diagram of the frequency, the same or the same phase of the touch-related signal; FIG. 12C shows that when the in-cell mutual-capacitive touch panel operates in the touch mode, the plurality of touch sensing electrodes sequentially apply a plurality of touches A timing diagram in which the sense signal and the common voltage electrode assume a floating state.

An embodiment of the present invention is an in-cell touch panel. In this embodiment, the in-cell touch panel is an in-cell mutual-capacitive touch panel, but is not limited thereto.

The in-cell touch panel in this embodiment includes a plurality of pixels. One of the stacked structures of each of the pixels includes a substrate, a thin film transistor element layer, a liquid crystal layer, a color filter layer, a glass layer, and a second conductive 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. A second conductive layer composed of a transparent conductive material is disposed over the glass layer.

Please refer to FIG. 2. FIG. 2 illustrates an embodiment of a touch electrode layout of the in-cell mutual-capacitive touch panel of the present invention. As shown in FIG. 2, the touch electrodes of the in-cell mutual-capacitive touch panel include a first direction electrode 21 and a second direction electrode 22, wherein the first direction electrode 21 is a network A lattice-shaped first conductive layer is formed and the second direction electrode 22 is formed by the second conductive layer. The first direction electrode 21 and the second direction electrode 22 can be used as the driving electrode (TX) and the sensing electrode (RX) of the mutual capacitance touch sensing, respectively, or the first direction electrode 21 and the second direction electrode 22 can be respectively The sensing electrode (RX) and the driving electrode (TX) as mutual capacitance touch sensing are not particularly limited.

It should be noted that, since the first conductive layer and the common voltage electrode 20 are disposed in the thin film transistor element layer and the second conductive layer is disposed above the thin film transistor element layer, the second conductive layer may be located on the first conductive layer. Above, that is, the second direction electrode 22 formed by the second conductive layer is located above the first direction electrode 21 formed by the first conductive layer.

In addition, the common voltage electrode trace TR is electrically connected to the common voltage electrode 20 through the via VIA to reduce the RC loading of the common voltage electrode 20. In fact, the common voltage electrode trace TR may be formed by a first conductive layer or other original conductive layer in a portion of the thin film transistor element layer where the first direction electrode 21 is not formed, but is not limited thereto.

3A, FIG. 3A is a cross-sectional view showing a first embodiment of a laminated structure of an in-cell mutual-capacitive touch panel of the present invention. As shown in FIG. 3A, the laminated structure 3 of the in-cell mutual-capacitive touch panel includes a substrate 30, a thin film transistor element layer 31, a liquid crystal layer 32, a color filter layer 33, a glass layer 34, and a second conductive layer 35. The thin film transistor element layer 31 is disposed on the substrate 30. A first conductive layer 310 and a common voltage electrode 312 are disposed in the thin film transistor element layer 31, and the first conductive layer 310 is formed behind the common voltage electrode 312. The first conductive layers 310 are arranged in a grid shape. A liquid crystal layer 32 including a plurality of liquid crystal cells LC is disposed above the thin film transistor element layer 31. The color filter layer 33 is disposed above the liquid crystal layer 32. The glass layer 34 is disposed above the color filter layer 33. The second conductive layer 35 is disposed above the glass layer 34.

It should be noted that the color filter layer 33 includes a black matrix resist (Black Matrix Resist) 330 and a color filter (Color Filter) 332. The grid-shaped first conductive layer 310 is disposed under the black matrix photoresist 330 to shield the underlying first conductive layer 310 through the black matrix photoresist 330 having good light shielding properties.

Please refer to FIG. 3B. FIG. 3B is a schematic diagram showing the pixel design of the in-cell mutual-capacitive touch panel of the present invention. As shown in FIG. 3B, the area division of the touch electrodes of the in-cell mutual-capacitive touch panel is determined according to the connection or disconnection of the first conductive layer 310.

For example, in the range 3A indicated by the broken line, since the first conductive layers 310 are connected to each other, the upper and lower pixels belong to the same touch electrode range; in the range 3C indicated by the broken line, the first conductive layers 310 are disconnected from each other. Therefore, the upper and lower pixels belong to different touch electrode ranges. In addition, in the range 3B indicated by the broken line, the first conductive layer 310 not forming the portion of the first direction electrode may be disposed in a vacant area between the touch electrodes, and may be electrically connected to the common voltage electrode 312 through the through hole VIA. , but not limited to this.

4A, FIG. 4A is a cross-sectional view showing a second embodiment of the laminated structure of the in-cell mutual-capacitive touch panel of the present invention. As shown in FIG. 4A , the stacked structure 4 of the in-cell mutual-capacitive touch panel comprises a substrate 40 , a thin film transistor element layer 41 , a liquid crystal layer 42 , a color filter layer 43 , a glass layer 44 , and a second conductive layer 45 . The thin film transistor element layer 41 is disposed on the substrate 40. A first conductive layer 410 and a common voltage electrode 412 are disposed in the thin film transistor element layer 41, and the first conductive layer 410 is formed before the common voltage electrode 412. The first conductive layers 410 are arranged in a grid shape. A liquid crystal layer 42 including a plurality of liquid crystal cells LC is disposed above the thin film transistor element layer 41. The color filter layer 43 is disposed above the liquid crystal layer 42. The glass layer 44 is disposed above the color filter layer 43. The second conductive layer 45 is disposed above the glass layer 44.

It should be noted that the color filter layer 43 includes a black matrix photoresist 430 and a color filter 432. The grid-shaped first conductive layer 410 is disposed under the black matrix photoresist 430 to shield the underlying first conductive layer 410 through the black matrix photoresist 430 having good light shielding properties.

Please refer to FIG. 4B. FIG. 4B is a schematic diagram showing the pixel design of the in-cell mutual-capacitive touch panel of the present invention. As shown in FIG. 4B, the area division of the touch electrodes of the in-cell mutual-capacitive touch panel is determined according to the connection or disconnection of the first conductive layer 410.

For example, in the range 4A indicated by the broken line, since the first conductive layers 410 are connected to each other, the upper and lower pixels belong to the same touch electrode range; in the range 4C indicated by the broken line, the first conductive layers 410 are disconnected from each other. Therefore, the upper and lower pixels belong to different touch electrode ranges. In addition, in the range 4B indicated by the broken line, the first conductive layer 410 of the portion where the first direction electrode is not formed may be disposed in a vacant area between the touch electrodes, and may be electrically connected to the common voltage electrode 412 through the through hole VIA. , but not limited to this.

Next, please refer to FIG. 5A. FIG. 5A is a cross-sectional view showing a third embodiment of a laminated structure of an in-cell mutual-capacitive touch panel of the present invention. As shown in FIG. 5A, the laminated structure 5 of the in-cell mutual-capacitive touch panel includes a substrate 50, a thin film transistor element layer 51, a liquid crystal layer 52, a color filter layer 53, a glass layer 54, and a second conductive layer 55. The thin film transistor element layer 51 is disposed on the substrate 50. A first conductive layer 510 and a common voltage electrode 512 are disposed in the thin film transistor element layer 51, and the first conductive layer 510 is formed behind the common voltage electrode 512. The first conductive layers 510 are arranged in a grid shape. A liquid crystal layer 52 including a plurality of liquid crystal cells LC is disposed above the thin film transistor element layer 51. The color filter layer 53 is disposed above the liquid crystal layer 52. The glass layer 54 is disposed above the color filter layer 53. The second conductive layer 55 is disposed above the glass layer 54.

It should be noted that the color filter layer 53 includes a black matrix photoresist 530 and a color filter 532. The grid-shaped first conductive layer 510 is disposed under the black matrix photoresist 530 to shield the underlying first conductive layer 510 through the black matrix photoresist 530 having good light shielding properties.

Please refer to FIG. 5B. FIG. 5B is a schematic diagram showing the pixel design of the in-cell mutual-capacitive touch panel of the present invention. As shown in FIG. 5B, the area division of the touch electrodes of the in-cell mutual-capacitive touch panel is determined according to the connection or disconnection of the first conductive layer 510.

For example, in the range 5A indicated by the broken line, since the first conductive layers 510 are disconnected from each other, the upper and lower pixels belong to different touch electrode ranges; in the range 5C indicated by the broken lines, the first conductive layers 510 are connected to each other. Therefore, the upper and lower pixels belong to the same touch electrode range. In addition, the conductive layer (for example, the gate conductive layer G) of the touch electrode is electrically connected to the common voltage electrode 512 through the through hole VIA, but is not limited thereto.

It should be particularly noted that, as shown in FIG. 5B, the two gates G in the thin film transistor element layer may be arranged adjacent to each other on the same side of the pixel, whereby the width of the black matrix photoresist located above may be reduced. In addition, the other side of the pixel may be provided with a first conductive layer 510 that does not form a portion of the first direction electrode or other original conductive layer in the thin film transistor element layer and is electrically connected to the common voltage electrode 512 as a common The voltage electrode 512 is routed and reduces the resistance and capacitance load of the common voltage electrode 512.

Next, please refer to FIG. 6A. FIG. 6A is a cross-sectional view showing a fourth embodiment of a laminated structure of the in-cell mutual-capacitive touch panel of the present invention. As shown in FIG. 6A, the laminated structure 6 of the in-cell mutual-capacitive touch panel comprises a substrate 60, a thin film transistor element layer 61, a liquid crystal layer 62, a color filter layer 63, a glass layer 64, and a second conductive layer 65. The thin film transistor element layer 61 is disposed on On the substrate 60. A first conductive layer 610 and a common voltage electrode 612 are disposed in the thin film transistor element layer 61, and the first conductive layer 610 is formed before the common voltage electrode 612. The first conductive layers 610 are arranged in a grid shape. A liquid crystal layer 62 including a plurality of liquid crystal cells LC is disposed above the thin film transistor element layer 61. The color filter layer 63 is disposed above the liquid crystal layer 62. The glass layer 64 is disposed above the color filter layer 63. The second conductive layer 65 is disposed above the glass layer 64.

It should be noted that the color filter layer 63 includes a black matrix photoresist 630 and a color filter 632. The grid-shaped first conductive layer 610 is disposed under the black matrix photoresist 630 to shield the underlying first conductive layer 610 through the black matrix photoresist 630 having good light shielding properties.

Please refer to FIG. 6B. FIG. 6B is a schematic diagram showing the pixel design of the in-cell mutual-capacitive touch panel of the present invention. As shown in FIG. 6B, the area division of the touch electrodes of the in-cell mutual-capacitive touch panel can be determined according to the connection or disconnection of the first conductive layer 610.

For example, in the range 6A indicated by the broken line, since the first conductive layers 610 are disconnected from each other, the upper and lower pixels belong to different touch electrode ranges; in the range 6C indicated by the broken lines, the first conductive layers 610 are connected to each other. Therefore, the upper and lower pixels belong to the same touch electrode range. In addition, in the range 6B indicated by the broken line, the conductive layer (for example, the gate conductive layer G) that is not formed with the touch electrode can be electrically connected to the common voltage electrode 612 through the through hole VIA, but is not limited thereto.

It should be particularly noted that, as shown in FIG. 6B, the two gates G in the thin film transistor element layer may be arranged adjacent to each other on the same side of the pixel, whereby the width of the black matrix photoresist located above may be reduced. In addition, the other side of the pixel may be provided with a first conductive layer 610 that does not form a portion of the first direction electrode or other original conductive layer in the thin film transistor element layer and is electrically connected to the common voltage electrode 612 as a common Trace the voltage electrode 612 and lower the common voltage electrode 611 resistor and capacitor load.

Next, referring to FIG. 7, when the laminated structure of the in-cell mutual-capacitive touch panel has a Half Source Driving (HSD) architecture, the stacked structure additionally has a space of a source line. In the range 7A and 7B indicated by the broken line, the original conductive layer in the thin film transistor element layer is electrically connected to the first conductive layer 710 by using the space of the extra vacant source line as the first conductive layer 710. A trace of the formed touch electrode (first direction electrode). In addition, in the range 7C indicated by the broken line, the original conductive layer in the thin film transistor element layer can also be electrically connected to the common voltage electrode 712 by using the space of the extra vacant source line as the common voltage electrode 712. The wiring is lined down and the resistance and capacitance load of the common voltage electrode 712 is lowered.

In a practical application, as shown in FIG. 8A and FIG. 8B, the touch electrodes of the in-cell mutual-capacitive touch panel include a first direction electrode 81 and a second direction electrode 82, wherein the first direction electrode 81 is formed by a grid shape. The aligned first conductive layer is formed and the second directional electrode 82 is formed by the second conductive layer, and the second directional electrode 82 is positioned above the first directional electrode 81.

It should be noted that the touch electrode distribution pattern of the in-cell mutual-capacitive touch panel, that is, the arrangement manner between the first-direction electrode 81 and the second-direction electrode 82 is not particularly limited, and may be as shown in FIG. 8A. Figure 8B or other arrangement layout. In addition, as shown in FIG. 9, a dummy electrode 83 may be disposed between the second directional electrodes 82 formed by the second conductive layer, and the dummy electrode 83 is in a floating state, but Not limited to this.

The in-cell mutual-capacitive touch panel of the present invention can be respectively operated in the display mode and the touch mode at different times, that is, the touch mode and the display mode of the in-cell mutual-capacitive touch panel of the present invention are time-divisionally driven. .

When the in-cell mutual-capacitive touch panel operates in the display mode, the gate driver and the source driver respectively output the gate driving signals G1 to G3 and the source driving signals S1 to S3 to drive the in-line mutual capacitance contacts. The pixel display screen of the control panel; when the in-cell touch panel operates in the touch mode, the common voltage electrode in the in-cell touch panel can be switched to a floating state or a touch-related signal is applied. But not limited to this.

Referring to FIG. 10A, the in-cell mutual-capacitive touch panel outputs a touch driving signal STH by using a blanking interval in the image signal SIM to operate in the touch mode. The in-cell mutual-capacitive touch panel 10A performs touch sensing in a non-display timing (ie, a blank interval). Please also refer to FIG. 10B. FIG. 10B is a schematic diagram showing a vertical blank interval, a horizontal blank interval, and a long horizontal blank interval, respectively. In practical applications, the in-line mutual-capacitive touch panel can adjust the number of blank intervals used by the embedded mutual-capacitance touch panel according to different driving modes. As shown in FIG. 10B, the blank section may include at least one of a Vertical Blanking Interval (VBI), a Horizontal Blanking Interval (HBI), and a Long Horizontal Blanking Interval (HH). Wherein, the length of the long horizontal blank interval LHBI is equal to or longer than the length of the horizontal blank interval HBI. The long horizontal blank interval LHBI may be a redistribution of a plurality of horizontal blank intervals HBI or a long horizontal blank interval LHBI including a vertical blank interval VBI.

In a practical application, the common voltage electrode in the in-cell mutual-capacitive touch panel of the present invention may have a single one or a plurality of common voltage electrode regions, and is not particularly limited.

In one embodiment, as shown in FIG. 11A, the common voltage electrode VCOM in the in-cell mutual-capacitive touch panel may have a plurality of common voltage electrode regions VCOM1 VVCOM3, and the common voltage electrode regions VCOM1 VVCOM3 and a plurality of The touch sensing electrodes TX1~TX3 overlap. As shown in FIG. 11B and FIG. 11C, when the in-cell mutual-capacitive touch panel operates in the display mode, the gate driver and the source driver respectively output the gate driving signals G1 to G3 and the source driving signals S1 to S3. In order to drive the pixel display screen of the embedded mutual capacitance touch panel; when the embedded mutual capacitance touch panel operates in the touch mode, the plurality of touch sensing electrodes TX1~TX3 sequentially apply a plurality of touches The plurality of common voltage electrode regions VCOM1 to VCOM3 of the control voltage signals STX1 to STX3 and the common voltage electrode VCOM are sequentially applied with a plurality of the same frequency, the same or the same phase as the plurality of touch sensing signals STX1 to STX3. The touch-related signals SVCOM1 to SVCOM3 (as shown in FIG. 11B) or the plurality of common voltage electrode regions VCOM1 to VCOM3 of the common voltage electrode VCOM are in a floating state (as shown in FIG. 11C).

In another embodiment, as shown in FIG. 12A, the common voltage electrode VCOM in the in-cell mutual-capacitive touch panel has a single common voltage electrode region and a plurality of touch senses of the in-cell mutual-capacitive touch panel. The electrodes TX1~TX3 overlap. As shown in FIG. 12B and FIG. 12C, when the in-cell mutual-capacitive touch panel operates in the display mode, the gate driver and the source driver respectively output the gate driving signals G1 to G3 and the source driving signals S1 to S3. To drive the pixel display of the in-cell mutual-capacitive touch panel; when the in-cell touch panel operates in the touch mode, the plurality of touch sensing electrodes TX1~TX3 sequentially apply a plurality of touch senses The test signals STX1~STX3 and the common voltage electrode VCOM are applied with a plurality of touch sensing signals STX1~STX3 at the same frequency, same or in phase one touch related signal SVCOM (as shown in FIG. 12B), or a common voltage electrode. The VCOM assumes a floating state (as shown in Figure 12C).

Compared with the prior art, the in-cell touch panel according to the present invention has the following advantages and effects:

(1) The design of the touch sensing electrode and its routing is simple.

(2) The layout method does not affect the original aperture ratio of the in-cell touch panel.

(3) Reduce the resistance and capacitance load of the common voltage electrode itself.

(4) When the in-cell touch panel operates in the touch mode, the common voltage electrode is simultaneously controlled to reduce the overall resistance and capacitance load of the in-cell touch panel.

(5) Time-division driving of the touch mode and the display mode to enhance the signal-to-noise ratio.

The features and spirits of the present invention are intended to be more apparent from the detailed description of the preferred embodiments. On the contrary, the intention is to cover various modifications and equivalents within the scope of the invention as claimed. The features and spirit of the present invention will be more apparent from the detailed description of the preferred embodiments. On the contrary, the intention is to cover various modifications and equivalents within the scope of the invention as claimed.

3‧‧‧Laminated structure

30‧‧‧Substrate

31‧‧‧Thin-film transistor component layer

32‧‧‧Liquid layer

33‧‧‧Color filter layer

34‧‧‧ glass layer

35‧‧‧Second conductive layer

310‧‧‧First conductive layer

312‧‧‧Common voltage electrode

314‧‧‧ Conductive layer

330‧‧‧Black matrix photoresist

332‧‧‧Color filters

LC‧‧‧Liquid Crystal Unit

G‧‧‧ gate

S‧‧‧ source

D‧‧‧汲

Claims (21)

An in-cell touch panel comprising: a plurality of pixels (Pixel), one of the stacked structures of each pixel comprises: a substrate; a thin film transistor component layer disposed on the substrate, the thin film transistor component layer A first conductive layer (M3) and a common voltage electrode (Common Electrode) are disposed, wherein the first conductive layer is arranged in a mesh type; a liquid crystal layer is disposed above the thin film transistor element layer a color filter layer disposed above the liquid crystal layer; a glass layer disposed above the color filter layer; and a second conductive layer (ITO) disposed over the glass layer; wherein the first conductive layer It is formed after the common voltage electrode. The in-cell touch panel as described in claim 1 is an in-line Mutual Capacitance touch panel, and the touch electrode of the in-cell mutual-capacitive touch panel includes a first a directional electrode and a second directional electrode, wherein the first directional electrode is formed by the first conductive layer arranged in a grid shape and the second directional electrode is formed by the second conductive layer. The in-cell touch panel of claim 1, wherein the second conductive layer is made of a transparent conductive material. An in-cell touch panel comprising: a plurality of pixels (Pixel), one of the stacked structures of each pixel comprises: a substrate; a thin film transistor component layer disposed on the substrate, the thin film transistor component layer The first conductive layer (M3) and a common voltage electrode (Common Electrode) are disposed, wherein the first conductive layer is arranged in a mesh type; a liquid crystal layer disposed above the thin film transistor element layer; a color filter layer disposed above the liquid crystal layer; a glass layer disposed above the color filter layer; and a second conductive layer (ITO), The common voltage electrode is switched to a floating state or a touch-related signal is applied when the in-cell touch panel operates in a touch mode. An in-cell touch panel comprising: a plurality of pixels (Pixel), one of the stacked structures of each pixel comprises: a substrate; a thin film transistor component layer disposed on the substrate, the thin film transistor component layer A first conductive layer (M3) and a common voltage electrode (Common Electrode) are disposed, wherein the first conductive layer is arranged in a mesh type; a liquid crystal layer is disposed above the thin film transistor element layer a color filter layer disposed above the liquid crystal layer; a glass layer disposed above the color filter layer; and a second conductive layer (ITO) disposed over the glass layer; wherein the first conductive layer It is formed before the common voltage electrode. An in-cell touch panel comprising: a plurality of pixels (Pixel), one of the stacked structures of each pixel comprises: a substrate; a thin film transistor component layer disposed on the substrate, the thin film transistor component layer A first conductive layer (M3) and a common voltage electrode (Common Electrode) are disposed, wherein the first conductive layer is arranged in a mesh type; a liquid crystal layer is disposed above the thin film transistor element layer a color filter layer disposed above the liquid crystal layer; a glass layer disposed above the color filter layer; and a second conductive layer (ITO) disposed above the glass layer; wherein the color filter layer comprises a color filter and a black matrix Black Matrix Resist, which has good light shielding properties, and the first conductive layer is located below the black matrix photoresist. An in-cell touch panel comprising: a plurality of pixels (Pixel), one of the stacked structures of each pixel comprises: a substrate; a thin film transistor component layer disposed on the substrate, the thin film transistor component layer A first conductive layer (M3) and a common voltage electrode (Common Electrode) are disposed, wherein the first conductive layer is arranged in a mesh type; a liquid crystal layer is disposed above the thin film transistor element layer a color filter layer disposed above the liquid crystal layer; a glass layer disposed above the color filter layer; and a second conductive layer (ITO) disposed over the glass layer; wherein the thin film transistor component The layer further includes an original conductive layer electrically connected to the common voltage electrode to serve as a trace of the common voltage electrode and reduce a RC loading of the common voltage electrode. An in-cell touch panel comprising: a plurality of pixels (Pixel), one of the stacked structures of each pixel comprises: a substrate; a thin film transistor component layer disposed on the substrate, the thin film transistor component layer A first conductive layer (M3) and a common voltage electrode (Common Electrode) are disposed, wherein the first conductive layer is arranged in a mesh type; a liquid crystal layer is disposed above the thin film transistor element layer ; a color filter layer disposed above the liquid crystal layer; a glass layer disposed above the color filter layer; and a second conductive layer (ITO) disposed above the glass layer; wherein the in-cell touch The touch panel of the in-cell mutual-capacitive touch panel includes a first direction electrode and a second direction electrode, and the first direction electrode is arranged in a grid shape. The first conductive layer is formed by the second conductive layer, and the first directional electrode and the second directional electrode are respectively a driving electrode (TX) and a sensing electrode (RX) or The first direction electrode and the second direction electrode are a sensing electrode (RX) and a driving electrode (TX), respectively. An in-cell touch panel comprising: a plurality of pixels (Pixel), one of the stacked structures of each pixel comprises: a substrate; a thin film transistor component layer disposed on the substrate, the thin film transistor component layer A first conductive layer (M3) and a common voltage electrode (Common Electrode) are disposed, wherein the first conductive layer is arranged in a mesh type; a liquid crystal layer is disposed above the thin film transistor element layer a color filter layer disposed above the liquid crystal layer; a glass layer disposed above the color filter layer; and a second conductive layer (ITO) disposed over the glass layer; wherein the in-line touch The control panel is an in-cell mutual-capacitive touch panel, and the touch electrode of the in-cell mutual-capacitive touch panel includes a first direction electrode and a second direction electrode, and the first direction electrode is meshed The first conductive layer is formed by the second conductive layer, and the second conductive layer is formed by the second conductive layer. The area division of the touch electrode is determined according to the connection or disconnection of the first conductive layer. An in-cell touch panel comprising: a plurality of pixels (Pixel), one of the stacked structures of each of the pixels comprises: a substrate; a thin film transistor element layer disposed on the substrate, wherein 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 is arranged in a mesh type; a liquid crystal layer is disposed above the thin film transistor element layer; and a color filter layer is disposed on the layer Above the liquid crystal layer; a glass layer disposed above the color filter layer; and a second conductive layer (ITO) disposed above the glass layer; wherein the in-cell touch panel is an in-line mutual capacitor The touch panel of the in-cell mutual-capacitive touch panel includes a first direction electrode and a second direction electrode, wherein the first direction electrode is formed by the first conductive layer arranged in a grid pattern and The second directional electrode is formed by the second conductive layer, and the first conductive layer not forming the portion of the first directional electrode is electrically connected to the common voltage electrode to serve as a trace of the common voltage electrode and is reduced Common voltage electrode Resistive load capacitance (RC loading). The in-cell touch panel of claim 10, wherein the first conductive layer that does not form the portion of the first direction electrode is disposed in a vacant area between the touch electrodes to The common voltage electrode is electrically connected. An in-cell touch panel comprising: a plurality of pixels (Pixel), one of the stacked structures of each pixel comprises: a substrate; a thin film transistor component layer disposed on the substrate, the thin film transistor component layer A first conductive layer (M3) and a common voltage electrode (Common Electrode) are disposed, wherein the first conductive layer is arranged in a mesh type; a liquid crystal layer is disposed above the thin film transistor element layer a color filter layer disposed above the liquid crystal layer; a glass layer disposed above the color filter layer; and a second conductive layer (ITO) disposed over the glass layer; wherein one of the gate and the other gate of the thin film transistor element layer The neighbors are arranged on the same side of the pixel. The in-cell touch panel of claim 12, wherein the other side of the pixel is provided with the first conductive layer or the thin film transistor element layer in a portion where the first direction electrode is not formed. One of the original conductive layers is electrically connected to the common voltage electrode to serve as a trace of the common voltage electrode and reduce the RC loading of the common voltage electrode. An in-cell touch panel comprising: a plurality of pixels (Pixel), one of the stacked structures of each pixel comprises: a substrate; a thin film transistor component layer disposed on the substrate, the thin film transistor component layer A first conductive layer (M3) and a common voltage electrode (Common Electrode) are disposed, wherein the first conductive layer is arranged in a mesh type; a liquid crystal layer is disposed above the thin film transistor element layer a color filter layer disposed above the liquid crystal layer; a glass layer disposed above the color filter layer; and a second conductive layer (ITO) disposed over the glass layer; wherein the in-line touch The control panel is an in-cell mutual-capacitive touch panel, and the touch electrode of the in-cell mutual-capacitive touch panel includes a first direction electrode and a second direction electrode, and the first direction electrode is meshed The first conductive layer is formed and the second directional electrode is formed by the second conductive layer. When the laminated structure has a half source driving (HSD) architecture, the laminated structure Extra space is left for a source line. The in-cell touch panel of claim 14, wherein one of the original conductive layers of the thin film transistor element layer utilizes an extra space of the source line and the first conductive layer. Electrically connected to serve as a trace of the first direction electrode. The in-cell touch panel of claim 14, wherein the thin film transistor component layer further comprises an original conductive layer, wherein the original conductive layer utilizes an extra space of the source line The common voltage electrode is electrically connected to serve as a trace of the common voltage electrode and reduce a RC loading of the common voltage electrode. An in-cell touch panel comprising: a plurality of pixels (Pixel), one of the stacked structures of each pixel comprises: a substrate; a thin film transistor component layer disposed on the substrate, the thin film transistor component layer A first conductive layer (M3) and a common voltage electrode (Common Electrode) are disposed, wherein the first conductive layer is arranged in a mesh type; a liquid crystal layer is disposed above the thin film transistor element layer a color filter layer disposed above the liquid crystal layer; a glass layer disposed above the color filter layer; and a second conductive layer (ITO) disposed over the glass layer; wherein the in-line touch The control panel is an in-cell mutual-capacitive touch panel, and the touch electrode of the in-cell mutual-capacitive touch panel includes a first direction electrode and a second direction electrode, and the first direction electrode is meshed An array of the first conductive layer is formed, and the second direction electrode is formed by the second conductive layer, and a dummy electrode is disposed between the second direction electrodes formed by the second conductive layer. And the dummy electrode is A floating (Floating) state. An in-cell touch panel comprising: a plurality of pixels (Pixel), and one of the stacked structures of each pixel comprises: a substrate; a thin film transistor element layer disposed on the substrate, wherein the thin film transistor element layer is provided with a first conductive layer (M3) and a common voltage electrode (Common Electrode), wherein the first conductive layer is a liquid crystal layer disposed above the thin film transistor element layer; a color filter layer disposed above the liquid crystal layer; a glass layer disposed above the color filter layer; And a second conductive layer (ITO) disposed above the glass layer; wherein the touch mode of the in-cell touch panel is driven by a display mode, and the in-cell touch panel is displayed by using One of the cycles, the blanking interval, operates in the touch mode. The in-cell touch panel of claim 18, wherein the common voltage electrode has a single common voltage electrode region and overlaps with a plurality of touch sensing electrodes of the in-cell touch panel. 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 with the same frequency and the same amplitude as the touch sensing signal. Or one of the in-phase touch-related signals, or the common voltage electrode system is in a floating state. The in-cell touch panel of claim 18, wherein the blank interval comprises a Vertical Blanking Interval (VBI), a Horizontal Blanking Interval (HBI), and a long horizontal level. At least one of a blank horizontal interval (Long Horizontal Blanking Interval), the length of the long horizontal blank interval being equal to or greater than a length of time of the horizontal blank interval, the long horizontal blank interval being redistributed by the plurality of horizontal blank intervals The long horizontal blank interval contains the vertical blank interval. The in-cell touch panel of claim 18, wherein the common voltage is electrically The plurality of common voltage electrode regions overlap with the plurality of touch sensing electrodes of the in-cell touch panel, and the plurality of touch sensing electrodes are used when the in-cell touch panel operates in the touch mode. The electrode system sequentially applies a plurality of touch sensing signals, and the common voltage electrode sequentially applies a plurality of touch-related signals in the same frequency, same-sense, or in-phase as the plurality of touch sensing signals, or The common voltage electrode is in a floating state.