阅读说明：本技术 触控显示装置 (Touch control display device ) 是由 纪佑旻 苏松宇 于 2019-10-18 设计创作，主要内容包括：本发明公开了一种触控显示装置,包含驱动电路和电极阵列。电极阵列配置于基板上,包含第一区域和第二区域。第一区域包含多个第一共通电极。第二区域包含多个第二共通电极。第一共通电极和第二共通电极各自通过多个连接线中不同的连接线耦接至驱动电路。在扫描周期的第一期间,驱动电路用以提供参考电压至第一共通电极,并用以提供第二共通电极相应的多个检测信号且根据第二共通电极的电压变化进行触控检测。(The invention discloses a touch display device which comprises a driving circuit and an electrode array. The electrode array is configured on the substrate and comprises a first area and a second area. The first region includes a plurality of first common electrodes. The second region includes a plurality of second common electrodes. The first common electrode and the second common electrode are respectively coupled to the driving circuit through different connecting lines in the plurality of connecting lines. In a first period of the scan period, the driving circuit is configured to provide a reference voltage to the first common electrode, and is configured to provide a plurality of detection signals corresponding to the second common electrode, and perform touch detection according to a voltage variation of the second common electrode.)

1. A touch display device, comprising:

a driving circuit; and

an electrode array disposed on a substrate, the electrode array comprising:

a first region including a plurality of first common electrodes; and

a second region including a plurality of second common electrodes, wherein the first common electrodes and the second common electrodes are respectively coupled to the driving circuit through different connection lines among a plurality of connection lines,

in a first period of a scan cycle, the driving circuit is used for providing a reference voltage for the first common electrodes, providing a plurality of detection signals corresponding to the second common electrodes, and performing touch detection according to voltage changes of the second common electrodes.

2. The touch display device of claim 1, wherein the driving circuit is configured to provide the detection signals corresponding to the second common electrodes simultaneously during the first period.

3. The touch display device of claim 1, wherein the driving circuit is configured to provide the reference voltages for the second common electrodes and the detection signals corresponding to the first common electrodes during a second period of the scan cycle, and perform touch detection according to voltage variation of the first common electrodes.

4. The touch display device of claim 1, wherein the electrode array further comprises a plurality of scan lines and a plurality of data lines, the scan lines and the data lines define a plurality of sub-pixels in a staggered manner, the sub-pixels comprise a plurality of first sub-pixels and a plurality of second sub-pixels, and any one of the first sub-pixels and the second sub-pixels comprises at least one pixel electrode, wherein the first common electrodes are disposed in the first sub-pixels, and the second common electrodes are disposed in the second sub-pixels.

5. The touch display device of claim 4, wherein during the first period of the scan cycle, the first sub-pixels are configured to receive the reference voltage from the corresponding first common electrodes and receive corresponding conducting scan signals from the scan lines to receive corresponding data signals from the data lines for displaying,

in a second period of the scan period, the second sub-pixels are configured to receive the reference voltage from the corresponding second common electrodes, and receive the corresponding conducting scan signals from the scan lines to receive the corresponding data signals from the data lines for displaying.

6. The touch display device according to claim 4, wherein the second sub-pixels are configured to receive a plurality of off scanning signals from the scanning lines during the first period, and the first sub-pixels are configured to receive a plurality of off scanning signals from the scanning lines during the second period.

7. The touch display device of claim 1, wherein the electrode array further comprises a third area, the third area comprises a plurality of third common electrodes, the third common electrodes are respectively coupled to the driving circuit through different connecting lines of the connecting lines, and the driving circuit is configured to provide the reference voltage for the third common electrodes, and is configured to provide the detection signals corresponding to the first common electrodes and perform touch detection according to voltage variation of the first common electrodes during a third period of the scan cycle.

8. The touch display device according to claim 7, wherein in the third period, the driving circuit is configured to provide the detection signals corresponding to the second common electrodes and perform touch detection according to voltage variation of the second common electrodes.

9. The touch display device of claim 1, wherein any one of the first common electrodes and the second common electrodes is coupled to the driving circuit through a single independent corresponding one of the connecting wires.

10. The touch display device of claim 1, wherein the number of the first common electrodes and the number of the second common electrodes are equal to the number of the connecting lines.

11. The touch display device of claim 1, wherein the driving circuit simultaneously generates a plurality of data signals, the reference voltage, and the detection signals during the first period, the first common electrodes receive the reference voltage, the pixel electrodes corresponding to the first common electrodes receive the data signals, and the second common electrodes receive the detection signals.

Technical Field

The present invention relates to a touch display device, and more particularly, to an embedded touch display device.

Background

With the development of technology, the demand of touch display devices is becoming more and more extensive. Conventionally, the addition of the embedded touch function takes up the time for charging the pixel electrode, which causes the charging rate to affect the display quality.

Therefore, it is a design consideration and challenge to consider how to consider the touch function and make the display pixels have sufficient charging time.

Disclosure of Invention

One aspect of the invention relates to a touch display device, which includes a driving circuit and an electrode array. The electrode array is configured on the substrate and comprises a first area and a second area. The first region includes a plurality of first common electrodes. The second region includes a plurality of second common electrodes. The first common electrode and the second common electrode are respectively coupled to the driving circuit through different connecting lines in the plurality of connecting lines. In a first period of the scan period, the driving circuit is configured to provide a reference voltage to the first common electrode, and is configured to provide a plurality of detection signals corresponding to the second common electrode, and perform touch detection according to a voltage variation of the second common electrode.

Drawings

Fig. 1 is a schematic diagram illustrating a touch display device according to some embodiments of the disclosure.

FIG. 2 is a schematic diagram illustrating an electrode array according to some embodiments of the present disclosure.

Fig. 3A is a flowchart illustrating a driving method of a touch display device according to some embodiments of the disclosure.

Fig. 3B is a detailed flowchart illustrating a method for driving a display device according to some embodiments of the disclosure.

Fig. 4 is a schematic signal timing diagram of a touch display device according to some embodiments of the disclosure.

Fig. 5A is a partially enlarged schematic view illustrating an electrode array according to some embodiments of the present disclosure.

FIG. 5B is a partial schematic perspective view of an electrode array according to the embodiment of FIG. 5A.

Fig. 6 is a schematic diagram illustrating another touch display device according to some other embodiments of the present disclosure.

Fig. 7 is a signal timing diagram of another touch display device according to some other embodiments of the disclosure.

Fig. 8 is a schematic diagram illustrating another touch display device according to another embodiment of the present disclosure.

Fig. 9A and 9B are signal timing diagrams illustrating another touch display device according to other embodiments of the disclosure.

Wherein, the reference numbers:

100: touch control display device

110: substrate

120: driving circuit

140: electrode array

140 a: first region

140 b: second region

140 c: a third region

140 d: fourth region

A11-Amn, B11-Bmn, C11-Cmn: common electrode

L0: connecting wire

GL 1-GLi: scanning line

DL 1-DLj: data line

P11-Pij: sub-pixel

300: driving method of touch display device

S320, S340, S321 to S323, S341 to S343: operation of

T1, T2, T3, T4: period of time

S1 to Sk, Sk +1 to Si, Ga _1 to Ga _ i, Gb _1 to Gb _ i, Gc _1 to Gc _ i, Gd _1 to Gd _ i: scanning signal

Sa, Sb, Sc, Sd: detecting the signal

DIN: data signal

PXe: pixel electrode

M1, M2, M3: metal layer

ITO1, ITO 2: conductive film layer

N1, N2, N3, N4: contact hole

Poly: channel

X, Y, Z: direction of rotation

Detailed Description

The embodiments are described in detail below with reference to the accompanying drawings, but the embodiments are only for explaining the present invention and not for limiting the present invention, and the description of the structural operation is not for limiting the execution sequence thereof, and any structure obtained by recombining the elements and having an equivalent function is included in the scope of the present disclosure. Moreover, the drawings are for illustrative purposes only and are not drawn to scale in accordance with established standards and practice in the industry, and the dimensions of various features may be arbitrarily increased or decreased for clarity of illustration. In the following description, the same elements will be described with the same reference numerals for ease of understanding.

The term (terms) used throughout the specification and claims has the ordinary meaning as commonly understood in the art, in the disclosure herein and in the claims, unless otherwise indicated. Certain terms used to describe the present disclosure will be discussed below or elsewhere in this specification to provide additional guidance to those skilled in the art in describing the present disclosure.

As used herein, the terms "comprising," having, "and the like are open-ended terms that mean" including, but not limited to. Further, as used herein, "and/or" includes any and all combinations of one or more of the associated listed items.

When an element is referred to as being "connected" or "coupled," it can be referred to as being "electrically connected" or "electrically coupled. "connected" or "coupled" may also be used to indicate that two or more elements are in mutual engagement or interaction. Moreover, although terms such as "first," "second," …, etc., may be used herein to describe various elements, these terms are used merely to distinguish one element or operation from another element or operation described in similar technical terms. Unless the context clearly dictates otherwise, the terms do not specifically refer or imply an order or sequence nor are they intended to limit the invention.

For convenience of illustration, the circuits and elements of the touch display device 100 of the present disclosure are shown in fig. 1 and fig. 2, respectively. Please refer to fig. 1. Fig. 1 is a schematic diagram illustrating a touch display device 100 according to some embodiments of the disclosure. As shown in fig. 1, the touch display device 100 includes a substrate 110, a driving circuit 120, and an electrode array 140. Structurally, the driving circuit 120 and the electrode array 140 are disposed on the substrate 110.

In some embodiments, the electrode array 140 includes a first region 140a and a second region 140 b. The electrode array 140 in the first region 140a includes a plurality of first common electrodes a11 to Amn. The electrode array 140 in the second region 140B includes a plurality of second common electrodes B11 to Bmn. Structurally, the first common electrode A11-Amn and the second common electrode B11-Bmn are each coupled to the driving circuit 120 through a different connection line of the plurality of connection lines L0. Specifically, any one of the first common electrode A11-Amn and the second common electrode B11-Bmn is coupled to the driving circuit 120 through a single independent corresponding connection line L0. In other words, the first common electrodes a11 to Amn and the second common electrodes B11 to Bmn correspond to the connection line L0 one-to-one. That is, the number of the first common electrodes A11 to Amn and the second common electrodes B11 to Bmn is equal to the number of the connection lines L0. For example, in the present embodiment, the number of the connecting lines L0 is m × n × 2.

In operation, the driving circuit 120 can respectively transmit corresponding signals or voltage levels to one or more of the first common electrode a11 to Amn and the second common electrode B11 to Bmn through different connection lines L0. Since each of the first common electrode a 11-Amn and the second common electrode B11-Bmn is coupled to the driving circuit 120 through the independent connection line L0, the driving circuit 120 can simultaneously transmit the corresponding signal or voltage level to two or more of the first common electrode a 11-Amn and the second common electrode B11-Bmn through different connection lines L0.

Please refer to fig. 2. Fig. 2 is a schematic diagram illustrating an electrode array 140 according to some embodiments of the present disclosure. As shown in fig. 2, the electrode array 140 includes a plurality of scan lines GL1 to GLi, a plurality of data lines DL1 to DLj, and a plurality of sub-pixels P11 to Pij. The scan lines GL 1-GLi and the data lines DL 1-DLj are interlaced with each other to define a plurality of sub-pixels P11-Pij. Each sub-pixel comprises at least one pixel electrode (not shown in fig. 2).

Specifically, the sub-pixels P11 Pij are respectively coupled to one of the scan lines GL1 GLi and one of the data lines DL1 DLj. For example, the sub-pixel P11 is coupled to the scan line GL1 and the data line DL 1. The sub-pixel P12 is coupled to the scan line GL1 and the data line DL 2. The sub-pixel P21 is coupled to the scan line GL2 and the data line DL 1. And so on, the sub-pixel Pij is coupled to the scan line GLi and the data line DLj.

In some embodiments, as shown in FIG. 2, the sub-pixels of the electrode array 140 include a plurality of first sub-pixels P11-Pkj and a plurality of second sub-pixels P (k +1) 1-Pij. Structurally, the first sub-pixels P11 to P Pkj are located in the first region 140a in fig. 1, and the first common electrodes a11 to am are disposed in the first sub-pixels P11 to P Pkj. The second sub-pixels P (k +1)1 to Pij are located in the second region 140B of FIG. 1, and the second common electrodes B11 to Bmn are disposed in the second sub-pixels P (k +1)1 to Pij. In some embodiments, for example, the first common electrode A11 is disposed in the first sub-pixels P11P 23. The detailed structure of the common electrode and the sub-pixels will be described in the following paragraphs.

In operation, the driving circuit 120 is configured to transmit a plurality of scan signals to the corresponding sub-pixels P11 Pij via the scan lines GL 1-GLi and transmit a plurality of data signals to the corresponding sub-pixels P11 Pij via the data lines DL 1-DLj. For example, the driving circuit 120 transmits the scan signal to the sub-pixels P11-P1 j through the scan line GL1, transmits the scan signal to the sub-pixels P21-P2 j through the scan line GL2, and so on, the driving circuit 120 transmits the scan signal to the sub-pixels Pi 1-Pij through the scan line GLi. In addition, the driving circuit 120 transmits data signals to the sub-pixels P11-Pi 1 through the data line DL1, transmits data signals to the sub-pixels P12-Pi 2 through the data line DL2, and so on, and the driving circuit 120 transmits data signals to the sub-pixels P1 j-Pij through the data line DLj.

Specifically, when the sub-pixels P11-Pij receive the turn-on scan signals from the scan lines GL 1-GLi, the driving transistors in the sub-pixels P11-Pij are turned on so that the sub-pixels P11-Pij can receive the data signals from the corresponding data lines DL 1-DLj. Conversely, when the sub-pixels P11-Pij receive the turn-off scan signal from the scan lines GL 1-GLi, the driving transistors in the sub-pixels P11-Pij are turned off so that the sub-pixels P11-Pij do not receive the data signal from the corresponding data lines DL 1-DLj and are at the floating voltage level (floating).

In some embodiments, the substrate 110 may be implemented by a glass substrate, a plastic substrate, or other suitable rigid or flexible substrate. In some embodiments, the driving circuit 120 may be implemented by a display Driver integrated chip (TDDI), but not limited thereto.

It should be noted that fig. 1 and fig. 2 are schematic diagrams for convenience of illustration only, and are not intended to represent the configuration relationship of the stacking structure, and the number of components is only for illustration and not limited thereto. Details regarding the configuration between the common electrodes and the sub-pixels in the electrode array 140 will be described in the following paragraphs.

Note that, the lower case letter indices 1 to m, n, i, k, or j in the component numbers and signal numbers used in the present specification and drawings are only for convenience of referring to individual components and signals, and are not intended to limit the number of the components and signals to a specific number. In the specification and drawings, if an element number or a signal number is used without indicating an index of the element number or the signal number, the element number or the signal number refers to any unspecified element or signal in an element group or a signal group. For example, the object designated by the element number GL1 is the scanning line GL1, and the object designated by the element number GL is an unspecified arbitrary scanning line among the scanning lines GL1 to GLi. For another example, the element number DL1 refers to the data line DL1, and the element number DL refers to any unspecified data line among the data lines DL1 to DLj.

Please refer to fig. 3A. Fig. 3A is a flow chart illustrating a method 300 for driving a touch display device according to some embodiments of the disclosure. For convenience and clarity of description, the following method 300 for driving a touch display device is described with reference to the embodiments shown in fig. 1-5B, but not limited thereto, and various modifications and alterations can be made by those skilled in the art without departing from the spirit and scope of the present disclosure. As shown in fig. 3A, the touch display device driving method 300 includes operations S320 and S340.

First, in operation S320, in the first period of the scan cycle, the driving circuit 120 is used to control the electrode array 140 of the first area 140a for displaying and control the electrode array 140 of the second area 140b for touch detection.

Next, in operation S340, during the second period of the scanning period, the driving circuit 120 is used to control the electrode array 140 of the second area 140b for displaying and control the electrode array 140 of the first area 140a for touch detection.

Specifically, the display is performed by inputting a conducting scan signal to the scan lines sequentially by the driving circuit 120 to control the transistors of the corresponding sub-pixels to be turned on, and inputting image data to the corresponding pixel electrodes by the driving circuit 120 through the conducting transistors via the data lines. The touch detection means that the driving circuit 120 outputs a detection signal to the corresponding common electrode through the transmission line L0, and returns a voltage change of the common electrode through the transmission line L0 to detect the occurrence position of touch.

For further details, please refer to fig. 3B and fig. 4 together. Fig. 3B is a detailed flowchart illustrating a method 300 for driving a touch display device according to some embodiments of the disclosure. Fig. 4 is a schematic signal timing diagram illustrating a touch display device 100 according to some embodiments of the disclosure. As shown in fig. 3B, operation S320 includes operations S321, S322, and S323, and operation S340 includes operations S341, S342, and S343.

In operation S321, during the first period of the scan period, the driving circuit 120 is configured to output corresponding turn-on scan signals through the scan lines GL 1-GLk such that the first sub-pixels P11-Pkj receive corresponding data signals from the data lines DL 1-DLj. Specifically, in the first period (e.g., the period T1 in fig. 4), the driving circuit 120 outputs scan signals (e.g., the signals S1 to Sk in fig. 4) to the corresponding first sub-pixels P11 to Pkj via the scan lines GL1 to GLk, respectively. The transistors of the first sub-pixels P11-Pkj are sequentially turned on according to the scan signals (e.g., the signals S1-Sk at the high level in FIG. 4) at the turn-on level, so that the first sub-pixels P11-Pkj receive the corresponding data signals (e.g., the data signals DIN in FIG. 4) from the data lines DL 1-DLj.

For example, during the period T1, the driving circuit 120 outputs the high-level scan signal S1 to the first sub-pixels P11-P1 j via the scan line GL1, such that the first sub-pixels P11-P1 j receive the data signals DIN from the corresponding data lines DL 1-DLj. Then, the driving circuit 120 outputs a high-level scan signal S2 to the first sub-pixels P21 to P2j through the scan line GL2, so that the first sub-pixels P21 to P2j receive the data signals DIN from the corresponding data lines DL1 to DLj. And so on, until the driving circuit 120 outputs the scan signal Sk with high level to the first sub-pixels Pk 1-Pkj through the scan line GLk, so that the first sub-pixels P1 k-Pkj receive the data signal DIN from the corresponding data lines DL 1-DLj.

In addition, during the first period T1 of the scan period, the driving circuit 120 is configured to output a corresponding turn-off scan signal (e.g., the signals Sk +1 to Si at the low level in fig. 4) to the second sub-pixels P (k +1)1 to Pij via the scan lines GLk +1 to GLi, so that the transistors in the second sub-pixels P (k +1)1 to Pij are turned off and do not receive the data signal DIN of the data lines DL1 to DLj.

In operation S322, the driving circuit 120 is configured to provide the reference voltage to the first common electrodes a 11-Amn during the first period of the scan period. Specifically, during the first period (e.g., the period T1 in fig. 4), the driving circuit 120 provides the reference voltage (e.g., the signal Sa with the low level in fig. 4) to the first common electrodes a11 to Amn in the first region 140a through the transmission line L0. At this time, the first sub-pixels P11-Pkj in the first region 140a are configured to receive the reference voltage (e.g., the signal Sa with the low level in FIG. 4) from the corresponding first common electrodes A11-Amn.

In operation S323, during the first period of the scan period, the driving circuit 120 is used to provide the detection signals corresponding to the second common electrodes B11 Bmn and perform touch detection according to the voltage variation of the second common electrodes B11 Bmn. Specifically, during the first period (e.g., the period T1 in FIG. 4), the driving circuit 120 provides the detection signal (e.g., the signal Sb in FIG. 4) to the second common electrodes B11 Bmn through the transmission line L0, and performs touch detection according to the voltage variation of the second common electrodes B11 Bmn through the transmission line L0.

For example, in some embodiments, the driving circuit 120 is configured to provide the detection signals corresponding to all of the second common electrodes B11 — Bmn through the different transmission lines L0, and detect the touch position according to the voltage variation returned by the different transmission lines L0. In some other embodiments, the driving circuit 120 may also provide the detection signals corresponding to the second common electrodes B11-Bmn in a divisional manner or sequentially for touch detection.

Next, in operation S341, during the second period of the scan period, the driving circuit 120 is configured to output corresponding on scan signals through the scan lines GLk +1 to GLi such that the second sub-pixels P (k +1)1 to Pij receive corresponding data signals from the data lines DL1 to DLj. Specifically, in the second period (e.g., the period T2 in fig. 4), the driving circuit 120 outputs the scanning signals (e.g., the signals Sk +1 to Si in fig. 4) to the corresponding second sub-pixels P (k +1)1 to Pij via the scanning lines GLk +1 to GLi, respectively. The transistors of the second sub-pixels P (k +1)1 to Pij are turned on sequentially according to the scan signals (e.g., the signals Sk +1 to Si at the high level in FIG. 4) at the turn-on level, so that the second sub-pixels P (k +1)1 to Pij receive the corresponding data signals (e.g., the data signals DIN in FIG. 4) from the data lines DL1 to DLj.

For example, during the period T2, the driving circuit 120 outputs the high-level scan signal Sk +1 to the second sub-pixels P (k +1)1 to P (k +1) j through the scan line GLk +1, so that the second sub-pixels P (k +1)1 to P (k +1) j receive the data signal DIN from the corresponding data lines DL1 to DLj. Then, the driving circuit 120 outputs the high-level scan signal Sk +2 to the second sub-pixels P (k +2)1 to P (k +2) j through the scan line GLk +2, so that the second sub-pixels P (k +2)1 to P (k +2) j receive the data signal DIN from the corresponding data lines DL1 to DLj. And so on, until the driving circuit 120 outputs the high-level scan signal Si to the second sub-pixels Pi 1-Pij through the scan line GLi, so that the second sub-pixels Pik-Pij receive the data signals DIN from the corresponding data lines DL 1-DLj.

In addition, during the second period T2 of the scan period, the driving circuit 120 is configured to output corresponding turn-off scan signals (e.g., signals S1 through Sk at low levels in fig. 4) to the first sub-pixels P11 through Pkj via the scan lines GL1 through GLk, such that the transistors in the first sub-pixels P11 through Pkj are turned off and do not receive the data signals DIN from the data lines DL1 through DLj.

In operation S342, the driving circuit 120 is configured to provide the reference voltage to the second common electrodes B11-Bmn during the second period of the scan period. Specifically, during the second period (e.g., the period T2 in FIG. 4), the driving circuit 120 provides the reference voltage (e.g., the signal Sb with the low level in FIG. 4) to the second common electrodes B11 Bmn in the second region 140B through the transmission line L0. At this time, the second sub-pixels P (k +1)1 Pij in the second region 140B are configured to receive the reference voltage (e.g., the signal Sb with the low level in FIG. 4) from the corresponding second common electrodes B11 Bmn.

In operation S343, during the second period of the scan cycle, the driving circuit 120 is configured to provide the detection signals corresponding to the first common electrodes a 11-Amn and perform touch detection according to the voltage variation of the first common electrodes a 11-Amn. Specifically, during the second period (e.g., the period T2 in fig. 4), the driving circuit 120 provides the detection signal (e.g., the signal Sa in fig. 4) to the first common electrodes a11 to Amn through the transmission line L0, and performs touch detection according to the voltage variation of the first common electrodes a11 to Amn through the transmission line L0.

For example, in some embodiments, the driving circuit 120 is configured to provide the detection signals corresponding to all of the first common electrodes a11 to Amn through different transmission lines L0, and detect the touch position according to the voltage variation returned by different transmission lines L0. In other embodiments, the driving circuit 120 may also provide the detection signals corresponding to the first common electrodes a 11-Amn in a divisional manner or sequentially for touch detection.

In this way, by dividing a complete scanning cycle into different periods, the first area 140a and the second area 140b of the electrode array 140 respectively perform display and touch detection in sequence, so that the detection time required by adding the touch function does not occupy the original pixel charging time in time sequence. In other words, by dividing the electrode array into different areas and allowing the different areas to simultaneously perform display or touch detection, the touch function can be added without affecting the charging efficiency.

For details of the configuration between the common electrode and the sub-pixel in the electrode array 140, please refer to fig. 5A and 5B. Fig. 5A is a partially enlarged schematic view illustrating an electrode array 140 according to some embodiments of the present disclosure. In order to simplify the drawings, conventional structures and elements are shown in simplified schematic form. In the embodiment, the scan line GL is disposed in the metal layer M1, and the data line DL is disposed in the metal layer M2. The connection line L0 is disposed on the metal layer M3. The common electrodes A11-Amn and B11-Bmn are arranged on the conductive thin film layer ITO 1. In addition, the scan lines GL disposed on the metal layer M1 and the data lines DL disposed on the metal layer M2 are interlaced with each other to define a plurality of sub-pixels, each sub-pixel includes at least one pixel electrode PXe, and the pixel electrode PXe is disposed on the conductive thin film ITO 2.

Specifically, in the embodiment of FIG. 5A, a common electrode A11 and six sub-pixels P11-P23 are shown, each of which includes at least one pixel electrode (e.g., sub-pixel P11 includes pixel electrode PXe). In the present embodiment, as shown in the cross-dot portion of fig. 5A, the common electrode a11 is implemented by a conductive thin film layer ITO1 formed by a patterning process. As shown in the dark background portion of fig. 5A, the pixel electrode PXe is implemented by the conductive thin film layer ITO2 formed by the patterning process.

In addition, the pixel electrode PXe is connected to a first terminal of a transistor (not shown), a gate terminal of the transistor is connected to the scan line GL (metal layer M1), and a second terminal of the transistor is connected to the data line DL (metal layer M2). The common electrode a11 (conductive thin film layer ITO1) is located below the pixel electrode PXe (conductive thin film layer ITO2) in the vertical projection direction (i.e., Z direction). In other words, the common electrode a11 is disposed in the sub-pixels P11 to P23.

In addition, in the present embodiment, the pixel electrode PXe disposed on the conductive thin film ITO2 is connected to the data line DL laid in the metal layer M2 through the connecting channel Poly. For example, the pixel electrode PXe of the sub-pixel P13 is connected to the channel Poly through the contact holes N2 and N4, and the channel Poly is further connected to the data line DL laid in the metal layer M2 through the contact hole N1. In the present embodiment, the common electrode a11 disposed on the conductive thin film layer ITO1 is connected to the connection line L0 laid in the metal layer M3 through the contact hole N3. In the perpendicular projection direction (i.e., Z direction), the metal layer M3 and the metal layer M2 overlap. In some embodiments, metal layer M3 is located above metal layer M2.

For further explanation, please refer to fig. 5B. Fig. 5B is a partial perspective view of the electrode array 140 according to the embodiment of fig. 5A. In fig. 5B, elements similar to those of fig. 5A will be denoted by the same symbols. And for ease of illustration, metal layers M1, M2, M3, channel Poly, thin-film-transistor layer ITO1, ITO2, and contact holes N1, N2, N3, and N4 are only schematically depicted in the embodiment of FIG. 5B. As shown in fig. 5B, in the embodiment, a channel Poly, a first metal layer M1, a second metal layer M2, a third metal layer M3, a conductive thin film layer ITO1 and a conductive thin film layer ITO2 are sequentially included between a lower substrate 110 and an upper substrate (not shown) of the touch display device 100. It is noted that the blocks between layers are merely for convenience of illustration and description, and no structure is necessarily required, and in some embodiments, a planar layer, a dielectric layer, or a structure disposed according to actual requirements may be included between layers.

In the present embodiment, the scan line GL is implemented by a metal wire laid on the metal layer M1, and the data line DL is implemented by a metal wire laid on the metal layer M2. And the transmission line L0 of the touch detection unit is implemented by a metal wire laid on the metal layer M3. The common electrode a11 can be formed by patterning the conductive thin film layer ITO 1. The pixel electrode PXe may be formed through the conductive thin film layer ITO2 of the patterning process.

In connection, the control terminals of the transistors of the sub-pixels are connected to the driving circuit 120 through the scan line GL (metal layer M1). The first terminals of the transistors of the sub-pixels are connected to the pixel electrode PXe (conductive thin film layer ITO2) through the contact holes N2 and N4. The second terminal of the transistor of the sub-pixel is connected to the data line DL (metal layer M2) via the contact hole N1 and then connected to the driving circuit 120. The common electrode a11 (conductive thin film layer ITO1) is connected to the driving circuit 120 through the contact hole N3 via a connection line L0 (metal layer M3).

In operation, the transistors of the sub-pixels are selectively turned on or off according to the scan signal received from the scan line GL (metal layer M1). Specifically, when the transistors of the sub-pixels are turned on according to the on-scan signal received from the scan line GL (metal layer M1) during displaying, the transistors of the sub-pixels receive the data signal from the data line DL (metal layer M2) to write the image data. In displaying, the common electrode a11 (conductive thin film ITO1) is used to provide the reference voltage received from the connection line L0 (metal layer M3) to the sub-pixel. In addition, during touch detection, the common electrode a11 (the conductive thin film layer ITO1) is used for receiving a detection signal from the connection line L0 (the metal layer M3) and returning a voltage change to the driving circuit 120 through the connection line L0 (the metal layer M3).

In other words, when the sub-pixels P11-P23 are displaying, the common electrode A11 corresponding to the sub-pixels P11-P23 is used to provide the reference voltage, and when the sub-pixels P11-P23 are not displaying, the common electrode A11 corresponding to the sub-pixels P11-P23 is used for touch detection. Thus, the common electrode a11 can be used for displaying or touch detection by time division.

It should be noted that although in the embodiment of fig. 5A and 5B, one common electrode a11 is shown corresponding to six sub-pixels, it is only used for exemplary illustration and is not meant to limit the disclosure. The area size, number, shape and/or overlapping of the common electrode a11 and the sub-pixels can be adjusted by one skilled in the art according to the actual requirements. In addition, the common electrode in the present disclosure can be implemented by the common electrode a11 in fig. 5A and 5B, but not limited thereto, and is not repeated herein.

Please refer to fig. 6 and 7. Fig. 6 is a schematic diagram illustrating another touch display device 100 according to some other embodiments of the present disclosure. Fig. 7 is a signal timing diagram of another touch display device 100 according to some other embodiments of the disclosure. In the embodiment of fig. 6, the components similar to those in fig. 1 are denoted by the same reference numerals, and the operation thereof is already described in the previous paragraphs, which is not repeated herein. Compared to fig. 1, in the embodiment of fig. 6, the electrode array 140 of the touch display device 100 further includes a third area 140 c. The electrode array 140 in the third region 140C includes a plurality of third common electrodes C11 to Cmn. The third common electrodes C11-Cmn are disposed in the corresponding third sub-pixels (not shown for simplicity of illustration). In some embodiments, the third common electrodes C11-Cmn can be implemented by the electrode arrays shown in fig. 5A and 5B, and are not repeated herein.

Structurally, the first common electrode A11-Amn, the second common electrode B11-Bmn and the third common electrode C11-Cmn are respectively coupled to the driving circuit 120 through different connecting lines of a plurality of connecting lines L0. In operation, the driving circuit 120 can respectively transmit corresponding signals or voltage levels to one or more of the first common electrode A11 Amn, the second common electrode B11 Bmn and the third common electrode C11 Cmn through different connecting lines L0.

Specifically, as shown in fig. 7, the first period T1, the second period T2, and the third period T3 are included in one complete scan cycle. During the first period T1, the driving circuit 120 is configured to output the corresponding turn-on scanning signals Ga _1 to Ga _ i such that the first sub-pixel receives the corresponding data signal DIN and provides the reference voltage Sa to the first common electrodes A11 to Amn. In addition, during the first period T1, the driving circuit 120 is configured to provide the detection signal Sb to the second common electrodes B11 — Bmn and/or provide the detection signal Sc to the third common electrodes C11 — Cmn, and output the corresponding off-scanning signals Gb _1 to Gb _ i, Gc _1 to Gc _ i to the second sub-pixel and the third sub-pixel.

During the second period T2, the driving circuit 120 is configured to output corresponding turn-on scanning signals Gb _1 Gb _ i to enable the second sub-pixel to receive the corresponding data signal DIN and provide the reference voltage Sb to the second common electrodes B11 Bmn. In addition, during the second period T2, the driving circuit 120 is configured to provide the detection signal Sa to the first common electrode a11 to Amn and/or provide the detection signal Sc to the third common electrode C11 to Cmn, and output the corresponding turn-off scanning signals Ga _1 to Ga _ i, Gc _1 to Gc _ i to the first sub-pixel and the third sub-pixel.

In the third period T3, the driving circuit 120 is configured to output the corresponding turn-on scan signals Gc _1 Gc _ i such that the third sub-pixel receives the corresponding data signal DIN and provides the reference voltage Sc to the third common electrodes C11 Cmn. In addition, during the third period T3, the driving circuit 120 is configured to provide the detecting signal Sa to the first common electrode a11 to Amn and/or provide the detecting signal Sb to the second common electrode B11 to Bmn, and output the corresponding turn-off scanning signals Ga _1 to Ga _ i and Gb _1 to Gb _ i to the first sub-pixel and the second sub-pixel.

In other words, the first sub-pixel of the first region 140a, the second sub-pixel of the second region 140b, and the third sub-pixel of the third region 140c sequentially receive the turn-on scanning signals Ga _1 to Ga _ i, Gb _1 to Gb _ i, Gc _1 to Gc _ i, and the data signal DIN for display during the periods T1, T2, and T3, respectively. When the sub-pixel of one of the first, second and third areas is displayed, touch detection is performed on the common electrode of the rest one or two of the first, second and third areas. It should be noted that although the embodiment of fig. 7 only shows that the touch detection is performed on the other two areas, which are not displayed, of the first, second, and third areas at the same time, in other embodiments, the touch detection may be performed on only one of the areas at the same time.

Please refer to fig. 8, fig. 9A and fig. 9B. Fig. 8 is a schematic diagram illustrating another touch display device 100 according to another embodiment of the disclosure. Fig. 9A and 9B are signal timing diagrams illustrating another touch display device 100 according to other embodiments of the disclosure. In the embodiment of fig. 8, the components similar to those in fig. 1 and 6 are denoted by the same reference numerals, and the operation thereof is already described in the previous paragraphs, which is not repeated herein. Compared to fig. 6, in the embodiment of fig. 8, the electrode array 140 of the touch display device 100 further includes a fourth area 140 d. The electrode array 140 in the fourth region 140d includes a plurality of fourth common electrodes. The fourth common electrode is configured in the corresponding fourth sub-pixels. The fourth common electrode can be implemented by the electrode arrays shown in fig. 5A and 5B, and is not described herein again.

Structurally, the first common electrode, the second common electrode, the third common electrode and the fourth common electrode are each coupled to the driving circuit 120 through a different connection line of the plurality of connection lines. In operation, the driving circuit 120 can transmit corresponding signals or voltage levels to one or more of the first common electrode, the second common electrode, the third common electrode and the fourth common electrode through different connection lines. For simplicity of illustration, the common electrode and the sub-pixels are not shown in the figure.

As shown in fig. 9A and 9B, a first period T1, a second period T2, a third period T3, and a fourth period T4 are included in one complete scan cycle. During the first period T1, the driving circuit 120 is configured to output the corresponding turn-on scanning signals Ga _ 1-Ga _ i such that the first sub-pixel receives the corresponding data signal DIN and provides the reference voltage Sa to the first common electrode. In addition, during the first period T1, the driving circuit 120 is configured to provide the detection signals Sb, Sc, and/or Sd to the corresponding second, third, and/or fourth common electrodes, and output the corresponding turn-off scanning signals Gb _1 to Gb _ i, Gc _1 to Gc _ i, Gd _1 to Gd _ i to the second sub-pixel, the third sub-pixel, and the fourth sub-pixel.

During the second period T2, the driving circuit 120 is configured to output corresponding turn-on scanning signals Gb _1 Gb _ i such that the second sub-pixel receives a corresponding data signal DIN and provides the reference voltage Sb to the second common electrode. In addition, during the second period T2, the driving circuit 120 is configured to provide the detection signals Sa, Sc, and/or Sd to the corresponding first, third, and/or fourth common electrodes, and output the corresponding turn-off scanning signals Ga _1 to Ga _ i, Gc _1 to Gc _ i, Gd _1 to Gd _ i to the first sub-pixel, the third sub-pixel, and the fourth sub-pixel.

In the third period T3, the driving circuit 120 is configured to output the corresponding turn-on scan signals Gc _1 to Gc _ i such that the third sub-pixel receives the corresponding data signal DIN and provides the reference voltage Sc to the third common electrode. In addition, during the third period T3, the driving circuit 120 is configured to provide the detection signals Sa, Sb and/or Sd to the corresponding first, second and/or fourth common electrodes, and output the corresponding turn-off scanning signals Ga _1 to Ga _ i, Gb _1 to Gb _ i, Gd _1 to Gd _ i to the first sub-pixel, the second sub-pixel and the fourth sub-pixel.

In the fourth period T4, the driving circuit 120 is configured to output the corresponding turn-on scanning signals Gd _1 to Gd _ i such that the fourth sub-pixel receives the corresponding data signal DIN and provides the reference voltage Sd to the fourth common electrode. In addition, during the fourth period T4, the driving circuit 120 is configured to provide the detection signals Sa, Sb and/or Sc to the corresponding first, second and/or third common electrodes, and output the corresponding off-scanning signals Ga _1 to Ga _ i, Gb _1 to Gb _ i, Gc _1 to Gc _ i to the first sub-pixel, the second sub-pixel and the third sub-pixel.

In other words, the first sub-pixel of the first region 140a, the second sub-pixel of the second region 140b, the third sub-pixel of the third region 140c, and the fourth sub-pixel of the fourth region 140d sequentially receive the turn-on scanning signals Ga _1 to Ga _ i, Gb _1 to Gb _ i, Gc _1 to Gc _ i, Gd _1 to Gd _ i, and the data signal DIN for display during the periods T1, T2, T3, and T4, respectively. When the sub-pixels of one of the first, second, third and fourth areas are displayed, touch detection is carried out on the common electrode of the rest one or more of the first, second, third and fourth areas. It should be noted that although the embodiment of fig. 9A and 9B only shows that the touch detection is performed on the other three areas, which are not displayed, of the first, second, third, and fourth areas at the same time, in other embodiments, the touch detection may be performed on only one or two areas at the same time.

In addition, although the present disclosure only describes that the electrode array 140 includes two to four regions and the scanning period includes two to four periods, the dividing manner or the number of the regions and the periods is not limited to this embodiment. The design can be adjusted by one skilled in the art according to the actual requirement.

The following table is experimental data obtained in accordance with some examples of the present disclosure.

1S		1	1	1	1	1	1
								Frequency of	Hertz's scale	60	60	120	60	120	120
Resolution of grid	Number of strips	2160	1920	1080	2560	1600	2160
								Multiplexer		3	3	3	2	2	2
Touch detection time	Second of	0.004	0.004	0.004	0.004	0.004	0.004
								Original charging time	Microsecond range	1.95	2.20	1.34	2.47	1.35	1.00
Charging time of scheme	Microsecond range	2.57	2.89	2.47	3.26	2.60	1.93

Watch 1

While the disclosed methods are illustrated and described herein as a series of steps or events, it will be appreciated that the order of the steps or events shown is not to be interpreted in a limiting sense. For example, some steps may occur in different orders and/or concurrently with other steps or events apart from those illustrated and/or described herein. In addition, not all illustrated steps may be required to implement one or more aspects or embodiments described herein. Furthermore, one or more steps herein may also be performed in one or more separate steps and/or stages.

It should be noted that, in the present disclosure, the features and circuits in the drawings, the embodiments and the embodiments may be combined with each other without conflict. The circuits shown in the drawings are for illustrative purposes only, are simplified to simplify the explanation and facilitate understanding, and are not intended to limit the present disclosure. In addition, each device, unit and element in the above embodiments can be implemented by various types of digital or analog circuits, or can be implemented by different integrated circuit chips, or integrated into a single chip. The foregoing is merely exemplary, and the disclosure is not limited thereto.

In summary, by applying the above embodiments, the display function and the touch detection function in the same area can be realized by sharing the common electrode through the time division, and no additional element is required. In addition, the electrode array is divided into different areas, so that the different areas can simultaneously and respectively carry out display or touch detection in the same period. The touch control function is added, the original pixel charging time is not occupied, and the charging efficiency is not influenced.

While the foregoing is directed to embodiments of the present disclosure, other and further embodiments of the disclosure may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow.