CN106708325A - Touch and control display panel and touching and controlling device - Google Patents

Abstract

The present application discloses a touch display panel and a touch display device. The touch display panel includes a plurality of second touch electrodes; The switching circuit selects the self-capacitance detection mode or the mutual capacitance detection mode; the first thin film transistor unit, each first thin film transistor unit includes a first thin film transistor and a second thin film transistor, and the first thin film transistor in the same first thin film transistor unit The first electrode of the transistor and the first electrode of the second thin film transistor are electrically connected to the same second touch electrode; the gates of the first thin film transistor and the second thin film transistor are electrically connected to the first control signal line; the first thin film transistor The second electrode of the second thin film transistor is electrically connected to the mutual capacitance scanning signal line; the second electrode of the second thin film transistor is electrically connected to the self-capacitance scanning signal line. The above self-capacity switching circuit can enable the touch display panel to switch between the self-capacitance detection mode and the mutual capacitance detection mode.

Description

Touch display panel and touch display device

technical field

The present application relates to the field of display technology, in particular to a touch display panel and a touch display device including the touch display panel.

Background technique

With the rapid development of display technology, touch display technology has gradually pervaded people's lives. Among the existing touch display panels, compared with resistive touch display panels, capacitive touch display panels have the advantages of long life, high light transmittance, and support for multi-touch, and have become a hot spot in touch display technology. .

Capacitive touch display panels can be classified into self-capacitive touch display panels and mutual-capacitive touch display panels. The self-capacitive touch display panel is composed of horizontal electrodes and vertical electrodes. When detecting the user's touch, the self-capacitive touch display panel scans the horizontal electrodes and the vertical electrodes respectively, and respectively determines the horizontal coordinates and vertical coordinates of the touch position, so as to obtain the position of the touch point on the display panel. If the self-capacitive touch display panel is composed of M horizontal scanning electrodes and N vertical scanning electrodes, the number of scans required by the self-capacitive scanning method is M+N times. It can be seen that the self-capacitive touch display panel has fewer scan times, Low power consumption. For a self-capacitive touch display panel, if the touch point is a single point, the coordinates of the touch point in the X-axis direction and the Y-axis direction are unique, but if the touch point has two (or more) points, each The coordinates of the touch point in the X-axis direction and the Y-axis direction are different, and "ghost points" are prone to appear. Taking two touch points as an example, each touch point has two projections in the X-axis direction and the Y-axis direction (for example, X1, X2 and Y1, Y2), so that 4 sets of coordinates can be combined, namely (X1, Y1), (X1, Y2), (X2, Y1) and (X2, Y2). However, only two sets of coordinates in these 4 sets of coordinates are the real coordinates of the two touch points, and the other two sets of coordinates constitute the so-called "ghost points".

The mutual capacitive touch display panel is composed of horizontal electrodes and vertical electrodes. The difference from the self-capacitive touch display panel is that capacitance is formed at the intersection of the horizontal electrodes and the vertical electrodes. When the user's finger touches the mutual capacitive touch display panel, it will affect the coupling between the two electrodes (horizontal electrodes and vertical electrodes) that constitute the capacitor near the touch point, thereby changing the coupling between the two electrodes. Capacitance, so as to detect the position of the touch point. For example, a mutual capacitive touch display panel is composed of M horizontal electrodes and N vertical electrodes, and the number of scans required by the mutual capacitive scanning method is M*N times. It can be seen that, compared with the self-capacitive scanning method, the mutual-capacitive scanning can accurately determine the multi-touch touch points of the touch display panel, but the power consumption will be greatly increased. Therefore, how to make the touch display panel and the touch display device including the touch display panel have both the characteristics of self-capacity detection and mutual capacitance detection has become a hot research topic.

Contents of the invention

In view of the above-mentioned defects in the prior art, the embodiments of the present application provide a touch display panel and a touch display device including the touch display panel, so as to solve the technical problems mentioned above in the background art section.

In order to achieve the above purpose, in the first aspect, the embodiment of the present application provides a touch display panel, including a first substrate; a plurality of first touch electrodes located on the first substrate, and the first touch electrodes are arranged along the first extending in one direction and arranged along the second direction, the first direction is perpendicular to the second direction; the first touch electrode signal line corresponding to the first touch electrode one by one, the first end of the first touch electrode signal line is connected to the corresponding The first touch electrode is electrically connected; the second substrate; a plurality of second touch electrodes located on the second substrate, the second touch electrodes extend along the second direction and are arranged along the first direction; and the second touch electrodes One-to-one electrical connection of the second touch electrode signal line; self-mutual capacitance switching circuit, the self-mutual capacitance switching circuit includes: a first control signal line, the first control signal line is used to control the self-mutual capacitance switching circuit to select self-capacitance detection mode or mutual capacitance detection mode; multiple self-capacitance scanning signal lines; multiple mutual capacitance scanning signal lines; multiple first thin film transistor units, each first thin film transistor unit includes a first thin film transistor and a second thin film transistor , wherein, the first thin film transistor unit corresponds to the second touch electrode one by one, and the first electrode of the first thin film transistor and the first electrode of the second thin film transistor in the same first thin film transistor unit pass the second touch electrode signal The line is electrically connected to the same second touch electrode; the gate of each first thin film transistor and the gate of each second thin film transistor are electrically connected to the first end of the first control signal line; each first thin film transistor unit contains The second pole of the first thin film transistor is electrically connected to the first end of the mutual capacitance scanning signal line in one-to-one correspondence; the second pole of the second thin film transistor contained in each first thin film transistor unit is connected to the first end of the self capacitance scanning signal line. One-to-one electrical connections.

Optionally, the first thin film transistor is a PMOS thin film transistor, and the second thin film transistor is an NMOS thin film transistor; or

The first thin film transistor is an NMOS thin film transistor, and the second thin film transistor is a PMOS thin film transistor.

Optionally, the touch display panel further includes a mutual capacitance scanning circuit, and the mutual capacitance scanning circuit is located on the second substrate, wherein,

The mutual capacitance scanning circuit includes a plurality of shift register units, each of which is electrically connected in stages, and the shift register units are electrically connected to the second ends of the mutual capacitance scanning signal lines in one-to-one correspondence.

Optionally, the touch display panel further includes a self-capacitance time-sharing detection circuit, and the self-capacity time-sharing detection circuit includes: at least one metal line, a second control signal line, and a second thin film transistor unit; the metal line One-to-one correspondence with the second thin film transistor units, each of the second thin film transistor units includes a third thin film transistor and a fourth thin film transistor; end and the second end of the first touch electrode signal line are electrically connected; the first electrode of the third thin film transistor is electrically connected to the second end of the self-capacitance scanning signal line, and the fourth thin film transistor The first pole of the first electrode is electrically connected to the second end of the first touch electrode signal line; the gate of each of the third thin film transistors and the gate of each of the fourth thin film transistors are connected to the second control signal line The first terminal of the same second thin film transistor unit is electrically connected to the second pole of the third thin film transistor and the second pole of the fourth thin film transistor is electrically connected to the first end of the same metal line .

Optionally, the third thin film transistor is a PMOS thin film transistor, and the fourth thin film transistor is an NMOS thin film transistor; or

The third thin film transistor is an NMOS thin film transistor, and the fourth thin film transistor is a PMOS thin film transistor.

Optionally, the self-capacitance time-division detection circuit is located on the first substrate.

Optionally, the touch display panel further includes: a first flexible circuit board bound on the first substrate; a first driver integrated circuit located on the first flexible circuit board circuit, the second end of the metal line and the second control signal line are respectively electrically connected to the first drive integrated circuit; the second flexible circuit board, the second flexible circuit board is bound on the second On the substrate: the second drive integrated circuit located on the second flexible circuit board, the second end of the first control signal line and the shift register unit are respectively electrically connected to the second drive integrated circuit.

Optionally, the touch display panel further includes: a first flexible circuit board bound on the first substrate; a first driver integrated circuit located on the first flexible circuit board circuit, the second end of the metal line and the second control signal line are respectively electrically connected to the first driver integrated circuit; the second driver integrated circuit located on the second substrate, the first control The second end of the signal line and the shift register unit are respectively electrically connected to the second driving integrated circuit.

Optionally, the self-capacitance time-division detection circuit is located on the second substrate.

Optionally, the touch display panel further includes: a first flexible circuit board bound on the second substrate; a first driver integrated circuit located on the first flexible circuit board A circuit; wherein, the second end of the metal line, the second end of the first control signal line, the second end of the second control signal line, and the shift register unit are respectively connected to the first driver The integrated circuit is electrically connected.

Optionally, the touch display panel includes: a first flexible circuit board bound on the first substrate; a first driver integrated circuit located on the first flexible circuit board , the second end of the first touch electrode signal line is electrically connected to the first driver integrated circuit; the second flexible circuit board, the second flexible circuit board is bound on the second substrate; located on the The second drive integrated circuit on the second flexible circuit board, the first control signal line, the second end of the self-capacitance scanning signal line and the shift register unit are respectively electrically connected to the second drive integrated circuit .

In a second aspect, the embodiment of the present application further provides a touch display device, including the above touch display panel.

The touch display panel and the touch display device provided by the embodiments of the present application include a plurality of first touch electrodes and first touch electrode signal lines, second touch electrodes and second touch electrode signal lines, and a first A control signal line, a self-capacitance scanning signal line, a mutual capacitance scanning signal line and a self-mutual capacitance switching circuit of the first thin film transistor unit. Wherein, the first touch electrode is electrically connected to the first touch electrode signal line, the second touch electrode is electrically connected to the second touch electrode signal line, and the first control signal line controls the self-capacitance switching circuit to select self-capacitance detection mode or mutual capacitance detection mode, so that the mutual capacitance scanning signal line is electrically connected to the second touch electrode through the first thin film transistor in the first thin film transistor unit, and the self capacitance scanning signal line is passed through the second thin film transistor of the first thin film transistor unit. The transistor is electrically connected to the second touch electrode, so that the touch display panel can realize switching between self-capacitance detection and mutual capacitance detection.

Description of drawings

Other characteristics, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings:

FIG. 1A shows a schematic structural diagram of a touch display panel provided by an embodiment of the present application;

FIG. 1B shows a specific structural schematic diagram of the self-mutual capacitance switching circuit in FIG. 1A;

FIG. 2A shows a schematic structural diagram of another touch display panel provided by an embodiment of the present application;

Fig. 2B shows the specific structure diagram of the self-capacitance time-sharing detection circuit in Fig. 2A;

FIG. 3 shows a schematic diagram of a touch display device provided by an embodiment of the present application.

detailed description

The principles and features of the present application will be further described in detail below in conjunction with the drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain related inventions, rather than to limit the invention. It should also be noted that, for ease of description, only parts related to the invention are shown in the drawings.

It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and embodiments.

Please refer to FIG. 1A and FIG. 1B , wherein FIG. 1A shows a schematic structural diagram of a touch display panel provided by an embodiment of the present application, and FIG. 1B shows a specific structural schematic diagram of the self-capacitance switching circuit in FIG. 1A . As shown in FIG. 1A, the touch display panel 100 of this embodiment may include a first substrate 101, a first touch electrode 102, a first touch electrode signal line 103, a second substrate 104, a second touch electrode 105 , a second touch electrode signal line 106 , and a self-capacitance switching circuit 107 .

In this embodiment, the touch display panel 100 may include a plurality of the above-mentioned first touch electrodes 102 and first touch electrode signal lines 103 . Each first touch electrode 102 is located on the first substrate 101, and each first touch electrode 102 extends along a first direction D1 and is arranged along a second direction D2, wherein the first direction D1 is perpendicular to the second direction D2, As shown in Figure 1A. The above-mentioned first touch electrode signal lines 103 are in one-to-one correspondence with each first touch electrode 102 , and the first end of each first touch electrode signal line 103 is electrically connected to the corresponding first touch electrode 102 . The above-mentioned touch display panel 100 may further include a plurality of second touch electrodes 105 and a second touch electrode signal line 106 corresponding to each second touch electrode 105 . Each second touch electrode 105 is located on the above-mentioned second substrate 104, and each second touch electrode 105 extends along the second direction D2 and is arranged along the first direction D1, as shown in FIG. 1A, each of the above-mentioned second touch electrodes 105 The electrode signal lines 106 correspond to the second touch electrodes 105 one by one, and the first end of each second touch electrode signal line 106 is electrically connected to the corresponding second touch electrodes 105 .

In this embodiment, the touch display panel 100 may further include a self-capacitance switching circuit 107 , as shown in FIG. 1A . As shown in FIG. 1B , the self-capacitance switching circuit 107 may specifically include a first control signal line 1071 , multiple self-capacitance scanning signal lines 1073 , multiple mutual-capacitance scanning signal lines 1072 and a first thin film transistor unit 1074 . The first TFT unit 1074 includes a first TFT M1 and a second TFT M2. The first control signal line 1071 can be used to control the self-capacitance switching circuit 107 to select the self-capacitance detection mode or the mutual-capacitance detection mode, and the first thin film transistor unit 1074 corresponds to each second touch electrode 105 one by one. As shown in FIG. 1B , the first electrode of the first thin film transistor M1 and the first electrode of the second thin film transistor M2 in the same first thin film transistor unit 1074 can communicate with the same second touch electrode signal line 106 . The control electrode 105 is electrically connected. That is, the first electrode of the first thin film transistor M1 and the first electrode of the second thin film transistor M2 in the same first thin film transistor unit 1074 are electrically connected to a second touch electrode signal line 106, and the second touch electrode signal line The line 106 is electrically connected to a second touch electrode 105, so that the first electrode of the first thin film transistor M1 and the first electrode of the second thin film transistor M2 in the same first thin film transistor unit 1074 are connected to the same second touch electrode. 105 electrical connection. The second pole of the first thin film transistor M1 is electrically connected to the first end of the mutual-capacity scanning signal line 1072 in one-to-one correspondence, and the second pole of the second thin film transistor M2 is connected to the first end of the self-capacitance scanning signal line 1073 One to one electrical connection. The gates of the first thin film transistors M1 and the gates of the second thin film transistors M2 are electrically connected to the first control signal line 1071, so that the first control signal line 1071 can control the first thin film transistor M1 or the second thin film transistor M2. The conduction of the transistor M2 controls the self-capacitance switching circuit 107 to select the self-capacitance detection mode or the mutual-capacitance detection mode.

In some optional implementation manners of this embodiment, the above-mentioned first thin film transistor M1 may be an NMOS thin film transistor, and the second thin film transistor M2 may be a PMOS thin film transistor, as shown in FIG. 1B . Alternatively, the first thin film transistor M1 is a PMOS thin film transistor, and the second thin film transistor M2 is an NMOS thin film transistor. That is, the first thin film transistor M1 and the second thin film transistor M2 included in the first thin film transistor unit 1074 are different types of thin film transistors, which can make the first control signal line 1071 output the first TFT to each first thin film transistor unit 1074. When the signal is controlled, the first thin film transistor M1 or the second thin film transistor M2 is turned on, and the self-capacitance switching circuit 107 can select one of the self-capacitance detection mode and the mutual-capacitance detection mode.

It can be understood that when the first control signal line 1071 outputs the first control signal to the gates of the first thin film transistor M1 and the second thin film transistor M2 electrically connected thereto, the first thin film transistor M1 or the second thin film transistor M2 Can be turned on. When each of the first thin film transistors M1 is turned on, the mutual capacitance scanning signal line 1072 can output a mutual capacitance scanning signal, that is, the first control signal, to the second touch electrode 105 electrically connected to the first thin film transistor M1. The line 1071 controls the mutual capacitance switching circuit 107 to select the mutual capacitance detection mode. When each of the second thin film transistors M2 is turned on, the self-capacitance scanning signal line 1073 can output a self-capacitance scanning signal, that is, the first control signal, to the second touch electrode 105 electrically connected to it through the second thin film transistor M2. Line 1071 controls the self-capacitance switching circuit 107 to select the self-capacitance detection mode.

Taking the first thin film transistor M1 as an NMOS transistor and the second thin film transistor M2 as a PMOS transistor as an example, the working method of the touch display panel 100 will be described below.

When the first control signal output by the first control signal line 1071 to the gates of the first thin film transistor M1 and the second thin film transistor M2 electrically connected thereto is a high level signal, the first thin film transistor M1 is turned on, and the second thin film transistor M1 is turned on. The two thin film transistors M2 are turned off, and the mutual capacitance detection mode is selected by the mutual capacitance switching circuit 107 . At this time, the mutual capacitance scanning signal lines 1072 can output mutual capacitance scanning signals to the second touch electrode signal lines 106 through the first thin film transistor M1 to scan the second touch electrodes 105 . The above-mentioned first touch electrode signal line 103 can output mutual capacitance sensing signals of each first touch electrode 102 to determine a touch point on the touch display panel 100 where a touch operation occurs.

When the first control signal output by the first control signal line 1071 to the gates of the first thin film transistor M1 and the second thin film transistor M2 electrically connected thereto is a low level signal, the second thin film transistor M2 is turned on, and the second thin film transistor M2 is turned on. A thin film transistor M1 is turned off, and the self-capacitance switching circuit 107 selects the self-capacitance detection mode. At this time, the above-mentioned respective capacitive scanning signal lines 1073 can output self-capacitive scanning signals to the respective second touch electrode signal lines 106 through the second thin film transistor M2 to scan the respective second touch electrodes 105 to determine what is happening on the touch display panel 100. The second touch electrode 105 for touch operation. Similarly, the above-mentioned first touch electrode signal line 103 can output a self-capacitance scanning signal to the corresponding first touch electrode 102, so that the self-capacitance scanning signal can scan each first touch electrode 102 to determine the touch display. The first touch electrodes 102 for touch operations on the panel 100 . Therefore, by combining the scanning results of the first touch electrodes 102 and the scanning results of the second touch electrodes 105 , it is possible to determine the specific position where the touch operation occurs on the touch display panel 100 .

In some optional implementations of this embodiment, the touch display panel 100 may further include a mutual capacitance scanning circuit 108, as shown in FIG. 1B, and the mutual capacitance scanning circuit 108 is located on the second substrate 104. . The above-mentioned mutual capacitance scanning circuit 108 may include a plurality of shift register units 1081, and each shift register unit 1081 may be electrically connected step by step, and the second end of each mutual capacitance scan signal line 1072 is connected to each shift register unit 1081 one by one. Corresponding electrical connections are made so that each shift register unit 1081 can output a mutual capacitance scanning signal to each mutual capacitance scanning signal line 1072 step by step. Each shift register unit 1081 can be connected to the driver integrated circuit through more than 10 signal lines including a start signal line, 2 to 4 clock signal lines, a high level signal line and a low level signal line. The mutual capacitance scanning circuit 108 is directly connected to the driving integrated circuit with respect to each mutual capacitance scanning signal line 1072 (generally 60 to 100 mutual capacitance scanning signal lines 1072 are required), which can reduce the number of ports and the wiring area, which is conducive to narrow Border design. Optionally, the touch display panel 100 may further include a first flexible circuit board 111 , a second flexible circuit board 112 , a first driver integrated circuit 113 and a second driver integrated circuit 114 , as shown in FIG. 1A . The first flexible circuit board 111 can be bound on the first substrate 101, and the above-mentioned first driving integrated circuit 113 can be arranged on the above-mentioned first flexible circuit board 111, the second end of each first touch electrode signal line 103 It is electrically connected with the first flexible circuit board 111 , so that each first touch electrode signal line 103 can be electrically connected with the first driving integrated circuit 113 provided on the first flexible circuit board 111 . Further, the above-mentioned second flexible circuit board 112 may be bound on the second substrate 104 , and the above-mentioned second driving integrated circuit 114 may be disposed on the second flexible circuit board 112 . The first control signal line 1071 , the second end of the self-capacitance scanning signal line 1073 and each shift register unit 1081 may be electrically connected to the second driver integrated circuit 114 provided on the second flexible circuit board 112 .

The touch display panel 100 provided by the above-mentioned embodiments of the present application includes a plurality of first touch electrodes 102 and first touch electrode signal lines 103 electrically connected thereto, second touch electrodes 105 and a plurality of first touch electrode signal lines 103 electrically connected thereto. The second touch electrode signal line 106, and the self-mutual capacitance switching circuit 107 including the first control signal line 1071, the mutual capacitance scanning signal line 1072, the self-capacitance scanning signal line 1073 and the first thin film transistor unit 1074, wherein the first The control signal line 1071 can control the self-capacitance switching circuit 107 to select the mutual capacitance detection mode or the self-capacitance detection mode, so that the mutual capacitance scanning signal line 1072 passes through the first thin film transistor M1 in the first thin film transistor unit 1074 and the corresponding first thin film transistor M1. The two touch electrodes 105 are electrically connected; or the self-capacitance scanning signal line 1073 is electrically connected to the corresponding second touch electrode 105 through the second thin film transistor M2 of the first thin film transistor unit 1074, so that the touch display panel 100 can realize self-control. Switch between capacitive sensing and mutual capacitive sensing.

Please continue to refer to Figure 2A and Figure 2B, where Figure 2A shows a schematic structural diagram of another touch display panel provided by the embodiment of the present application, and Figure 2B shows the specific structure of the self-capacitance time-sharing detection circuit in Figure 2A schematic diagram. As shown in FIG. 2A, the touch display panel 200 of this embodiment may include a first substrate 201, a first touch electrode 202, a first touch electrode signal line 203, a second substrate 204, a second touch electrode 205 , the second touch electrode signal line 206 , the self-capacitance switching circuit 207 , the self-capacitance time-sharing detection circuit 209 , the first driving integrated circuit 210 and the first flexible circuit board 211 .

In this embodiment, the touch display panel 200 may include a plurality of first touch electrodes 202 and first touch electrode signal lines 203 . Each first touch electrode 202 is located on the above-mentioned first substrate 201, and each first touch electrode 202 extends along a first direction D1 and is arranged along a second direction D2, wherein the first direction D1 is perpendicular to the second direction D2, As shown in Figure 2A. The above-mentioned first touch electrode signal lines 203 are in one-to-one correspondence with each first touch electrode 202 , and the first end of each first touch electrode signal line 203 is electrically connected to the corresponding first touch electrode 202 . The above-mentioned touch display panel 200 further includes a second touch electrode 205 and a second touch electrode signal line 206 . Each second touch electrode 205 is located on the second substrate 204 , and each second touch electrode 205 extends along the second direction D2 and is arranged along the first direction D1 , as shown in FIG. 2A . The above-mentioned first flexible circuit board 211 can be bound on the second substrate 204, and the above-mentioned first driving integrated circuit 210 is located on the first flexible circuit board 211, as shown in FIG. 2A. Wherein, the first touch electrode signal line 203 is connected to the first driving integrated circuit 210 through internal etching or encapsulation glue wiring.

Same as other embodiments, in this embodiment, the touch display panel 200 further includes a self-capacitance switching circuit 207 , as shown in FIG. 2A . The aforementioned self-capacitance switching circuit 207 may specifically include a first control signal line 2071 , a plurality of self-capacitance scanning signal lines 2073 , a plurality of mutual-capacitance scanning signal lines, and a first thin film transistor unit. Each first thin film transistor unit includes a first thin film transistor M1 (not shown, refer to the first thin film transistor in FIG. 1B ) and a second thin film transistor M2 (not shown, refer to the second thin film transistor in FIG. 1B ) . Wherein, the above-mentioned first control signal line 2071 is used to control the self-capacitance switching circuit 207 to select the self-capacitance detection mode or the mutual-capacitance detection mode. It should be noted that the above-mentioned first thin film transistor unit corresponds to each second touch electrode 205 one by one, and the first electrode of the first thin film transistor M1 and the first electrode of the second thin film transistor M2 in the same first thin film transistor unit The electrode can be electrically connected to the same second touch electrode 205 through the second touch electrode signal line 206 . The second pole of the first thin film transistor M1 is electrically connected to the first end of the mutual-capacitance scanning signal line in one-to-one correspondence, and the second pole of the second thin film transistor M2 is connected to the first end of the self-capacitance scanning signal line 2073 in one-to-one correspondence. One-to-one electrical connection. The gates of the first thin film transistors M1 and the second thin film transistors M2 are electrically connected to the first end of the first control signal line 2071, and the second end of the first control signal line 2071 can be connected to the first end of the first control signal line 2071. A driving integrated circuit 210 is electrically connected so that the first driving integrated circuit 210 can provide the first control signal to the first control signal line 2071 , as shown in FIG. 2A . Same as other embodiments, the self-mutual capacitance switching circuit 207 also includes a mutual capacitance scanning circuit, and each shift register unit in the mutual capacitance scanning circuit can also be electrically connected to the first driving integrated circuit 210, so that the first The driving integrated circuit 210 can output the mutual capacitance scanning signal to the mutual capacitance scanning signal line.

In this embodiment, the touch display panel 200 further includes a self-capacitance time-division detection circuit 209 , as shown in FIG. 2A . The self-capacitance time-sharing detection circuit 209 is electrically connected to the self-capacitance scanning signal lines 2073 in the above-mentioned self-capacitance switching circuit 207 , and provides self-capacitance scanning signals for the respective capacitance scanning signal lines 2073 . The second control line number line 2091 of the above-mentioned self-capacitance time-sharing detection circuit 209 can be electrically connected with the above-mentioned first driver integrated circuit 210, and the first driver integrated circuit 210 can be the self-capacity time-sharing detection circuit 209 through the second control signal line 2091. A second control signal is provided.

In this embodiment, the self-capacitance time-division detection circuit 209 may include at least one second thin film transistor unit 2092, as shown in FIG. 2B. The second thin film transistor unit 2092 can be electrically connected to the second end of the self-capacitance scanning signal line 2073, and the second thin film transistor unit 2092 can be electrically connected to the second end of the first touch electrode signal line 203, as shown in FIG. 2B shown. Compared with directly electrically connecting the first touch electrode signal line 203 and the self-capacitance scanning signal line 2073 to the first driving integrated circuit 210 , this can reduce the number of pins occupied by the first driving integrated circuit 210 .

Specifically, each second thin film transistor unit 2092 may include a third thin film transistor M3 and a fourth thin film transistor M4, as shown in FIG. 2B . The gates of the third thin film transistors M3 and the gates of the fourth thin film transistors M4 may be electrically connected to the second control signal line 2091, so that the second control signal line 2091 can select the first thin film transistor in the second thin film transistor unit 2092. The third thin film transistor M3 or the fourth thin film transistor M4 is turned on. The first electrode of the third thin film transistor M3 is electrically connected to the second end of the corresponding self-capacitance scanning signal line 2073, and the first electrode of the fourth thin film transistor M4 is electrically connected to the second end of the corresponding first touch electrode signal line 203. Terminals are electrically connected, and the second electrode of the third thin film transistor M3 and the second electrode of the fourth thin film transistor M4 in the same second thin film transistor unit 2092 can be electrically connected with the first end of the same metal line 2093, as shown in 2B As shown, the second end of each metal line 2093 is electrically connected to the first driving integrated circuit 210 . The second end of the second control signal line 2091 is electrically connected to the first driving integrated circuit 210 , so that the first driving integrated circuit 210 can provide the second control signal for the self-capacitance time-sharing detection circuit 209 .

In this embodiment, the above-mentioned third thin film transistor M3 may be an NMOS thin film transistor, and the fourth thin film transistor M4 may be a PMOS thin film transistor, as shown in FIG. 2B . Alternatively, the above-mentioned third thin film transistor M3 may be a PMOS thin film transistor, and the fourth thin film transistor M4 may be an NMOS thin film transistor. That is, the third transistor M3 and the fourth transistor M4 included in the second thin film transistor unit 2092 are different types of thin film transistors, which can make the second control signal line 2091 output the second control signal to each second thin film transistor unit 2092 , the third thin film transistor M3 or the fourth thin film transistor M4 is turned on. When the third thin film transistor M3 is turned on, the self-capacitance time-sharing detection circuit 209 can output a self-capacitance scanning signal for the self-capacitance scanning signal line 2073 or receive a self-capacitance scanning result, that is, provide self-capacitance scanning for the second touch electrode 205 signal or receive the self-capacitance scanning result; when the fourth thin film transistor M4 is turned on, the self-capacitance time-sharing detection circuit 209 can provide the first touch electrode signal line 203 with a self-capacitance scanning signal or receive the self-capacitance scanning result.

Optionally, the above-mentioned self-capacitance time-division detection circuit 209 may be disposed on the second substrate 204, as shown in FIG. 2A . Alternatively, the above-mentioned self-capacitance time-sharing detection circuit 209 can also be arranged on the first substrate 201, and here the position of the above-mentioned self-capacity time-sharing detection circuit 209 can be set according to actual needs. For example, when the above-mentioned self-capacitance time-sharing detection circuit is arranged on the first substrate, the overall structure of the touch display panel in this embodiment can also be shown in FIG. 1A, that is, the touch display panel can include a first flexible circuit board, The second flexible circuit board, the first driver integrated circuit and the second driver integrated circuit. Wherein, the first flexible circuit board can be bound on the first substrate, and the first driving integrated circuit is located on the first flexible circuit board. Moreover, the second end of the metal wire in the self-capacitance time-sharing detection circuit is electrically connected to the first driving integrated circuit, and the second control signal line in the self-capacitance time-sharing detection circuit can be electrically connected to the above-mentioned first driving integrated circuit. The above-mentioned second flexible circuit board can be bound on the second substrate, and the second driving integrated circuit is located on the second flexible circuit board. The second end of the first control signal line of the self-capacitance switching circuit is electrically connected to the second driving integrated circuit, and the shift register units may also be electrically connected to the second driving integrated circuit.

Optionally, the touch display panel in this embodiment may further include a first flexible circuit board, a first driver integrated circuit and a second driver integrated circuit. Wherein, the first flexible circuit board is bound on the first substrate, and the first driving integrated circuit is located on the first flexible circuit board. Moreover, the second end of the metal wire in the self-capacitance time-sharing detection circuit is electrically connected to the first driving integrated circuit, and the second control signal line in the self-capacitance time-sharing detection circuit can be electrically connected to the above-mentioned first driving integrated circuit. The above-mentioned second driving integrated circuit is arranged on the second substrate, the second end of the first control signal line of the above-mentioned self-capacitance switching circuit is electrically connected to the above-mentioned second driving integrated circuit, and the above-mentioned shift register units can also be respectively It is electrically connected with the above-mentioned second driving integrated circuit.

Taking the third thin film transistor M3 as an NMOS transistor and the fourth thin film transistor M4 as a PMOS transistor as an example, the working method of the touch display panel 200 will be described below.

When the first control signal line 2071 controls the self-mutual capacitance switching circuit 207 to select the mutual capacitance detection mode, in the process of mutual capacitance detection, the second control signal line 2091 sends a signal to the third thin film transistor M3 and the second thin film transistor M3 electrically connected to it. The second control signal output by the gates of the four thin film transistors M4 is a low level signal, so that the third thin film transistors M3 are turned off and the fourth thin film transistors M4 are turned on. The first touch electrode signal line 203 can send the touch sensing signal of the first touch electrode 202 to the first driving integrated circuit 210 through the fourth thin film transistor M4, so that the touch display panel 200 can determine that a touch occurs. The touch point of the operation.

When the first control signal 2071 controls the self-capacitance switching circuit 207 to select the self-capacitance detection mode, the second touch signal line 2091 can first send a signal to the gates of the third thin film transistor M3 and the fourth thin film transistor M4 electrically connected to it. The pole outputs a high-level signal, so that each of the third thin film transistors M3 is turned on and each of the fourth thin film transistors M4 is turned off, and the first driver integrated circuit 210 communicates with the corresponding self-capacitance scanning signal line 2073 Electrically connected, the above-mentioned first driving integrated circuit 210 outputs a self-capacitance scanning signal to the self-capacitance scanning signal line 2073 to scan each second touch electrode 205 and receive the corresponding scanning result; then, the above-mentioned second control signal line 2091 communicates with it The gates of the electrically connected third thin film transistors M3 and fourth thin film transistors M4 output a low-level signal, each of the third thin film transistors M3 is turned off and each of the fourth thin film transistors M4 is turned on, and the first driver integrated circuit 210 passes The fourth thin film transistor M4 is electrically connected to the corresponding first touch electrode signal line 203, so that the first driving integrated circuit 210 can output a self-capacitance scanning signal to the first touch electrode signal line 203, and then scan each first touch electrode signal line 203. electrode 202 and receive corresponding scan results. It can be seen that in the self-capacitance detection mode, the pins electrically connected to the same metal line 2093 in the above-mentioned first driving integrated circuit 210 can be time-divisionally multiplexed as signal input and output pins of the first touch electrode 202 and the second touch electrode 205. The number of pins occupied by the first driver integrated circuit 210 can be reduced.

Compared with the touch display panel 100, the touch display panel 200 provided by the above-mentioned embodiments of the present application includes a self-capacitance switching circuit 207 and a self-capacitance time-sharing detection circuit 209. The above-mentioned first touch The electrode signal line 203 and the self-capacitance scanning signal line 2073 can be electrically connected to the self-capacitance time-sharing detection circuit 209, and then the self-capacity time-sharing detection circuit 209 is electrically connected to the first driving integrated circuit 210, which is connected to the first touch electrode Compared with the signal line 203 and the self-capacitance scanning signal line 2073 being directly electrically connected to the first driving integrated circuit 210 , the number of pins occupied by the first driving integrated circuit 210 can be reduced.

The above touch display panel may also include some known structures, such as data lines, scan lines, pixel electrodes, liquid crystal layer, and spacer columns for supporting the liquid crystal layer. Wherein, the liquid crystal layer rotates under the action of the electric field between the pixel electrode and the above-mentioned common electrode to realize the display of the screen.

In addition, the present application also provides a touch display device 300, which may include the touch display panel in the above-mentioned embodiments. Here, as shown in FIG. 3 , FIG. 3 shows a schematic diagram of a touch display device provided by an embodiment of the present application. The touch display device 300 can be a mobile phone with a touch function as shown in FIG. 3 , and the structure and function of the touch display panel in the touch display device 300 are the same as those in the above-mentioned embodiments, and will not be repeated here. Those skilled in the art can understand that the above-mentioned touch display device can also be a computer, a TV, a wearable smart device, etc. with a touch function, which will not be listed here.

The above description is only a preferred embodiment of the present application and an illustration of the applied technical principle. Those skilled in the art should understand that the scope of the invention involved in this application is not limited to the technical solution formed by the specific combination of the above-mentioned technical features, but should also cover the technical solutions made by the above-mentioned technical features without departing from the inventive concept. Other technical solutions formed by any combination of or equivalent features thereof. For example, a technical solution formed by replacing the above-mentioned features with technical features with similar functions disclosed in (but not limited to) this application.

Claims (12)

1. A touch display panel, characterized in that, comprising: first substrate; a plurality of first touch electrodes located on the first substrate, the first touch electrodes extend along a first direction and are arranged along a second direction, and the first direction is perpendicular to the second direction; a first touch electrode signal line corresponding to the first touch electrode one by one, the first end of the first touch electrode signal line is electrically connected to the corresponding first touch electrode; second substrate; a plurality of second touch electrodes located on the second substrate, the second touch electrodes extending along the second direction and arranged along the first direction; a second touch electrode signal line electrically connected to the second touch electrode in one-to-one correspondence; A self-mutual capacitance switching circuit, the self-mutual capacitance switching circuit includes: A first control signal line, the first control signal line is used to control the self-capacitance switching circuit to select a self-capacitance detection mode or a mutual capacitance detection mode; Multiple self-capacitance scanning signal lines; Multiple mutual capacity scanning signal lines; A plurality of first thin film transistor units, each of the first thin film transistor units includes a first thin film transistor and a second thin film transistor, Wherein, the first thin film transistor unit corresponds to the second touch electrode one by one, and the first electrode of the first thin film transistor and the first electrode of the second thin film transistor in the same first thin film transistor unit One pole is electrically connected to the same second touch electrode through the second touch electrode signal line; The gates of each of the first thin film transistors and the gates of each of the second thin film transistors are electrically connected to the first end of the first control signal line; The second electrode of the first thin film transistor included in each of the first thin film transistor units is electrically connected to the first end of the mutual capacitance scanning signal line in one-to-one correspondence; The second electrode of the second thin film transistor included in each of the first thin film transistor units is electrically connected to the first end of the self-capacitance scanning signal line in a one-to-one correspondence. 2. The touch display panel according to claim 1, wherein the first thin film transistor is a PMOS thin film transistor, and the second thin film transistor is an NMOS thin film transistor; or The first thin film transistor is an NMOS thin film transistor, and the second thin film transistor is a PMOS thin film transistor. 3. The touch display panel according to claim 2, wherein the touch display panel further comprises a mutual capacitance scanning circuit, and the mutual capacitance scanning circuit is located on the second substrate, wherein, The mutual capacitance scanning circuit includes a plurality of shift register units, each of which is electrically connected step by step, and the shift register units are electrically connected to the second ends of the mutual capacitance scanning signal lines in one-to-one correspondence . 4. The touch display panel according to claim 3, wherein the touch display panel further comprises a self-capacitance time-sharing detection circuit; The self-capacitance time-sharing detection circuit includes: at least one metal line, a second control signal line, and a second thin film transistor unit; The metal lines correspond to the second thin film transistor units one by one, and each second thin film transistor unit includes a third thin film transistor and a fourth thin film transistor; The second thin film transistor unit is electrically connected to the second end of the self-capacitance scanning signal line and the second end of the first touch electrode signal line; The first electrode of the third thin film transistor is electrically connected to the second end of the self-capacitance scanning signal line, and the first electrode of the fourth thin film transistor is electrically connected to the second end of the first touch electrode signal line. connect; The gates of each of the third thin film transistors and the gates of each of the fourth thin film transistors are electrically connected to the first end of the second control signal line; The second electrode of the third thin film transistor and the second electrode of the fourth thin film transistor in the same second thin film transistor unit are electrically connected to the first end of the same metal line. 5. The touch display panel according to claim 4, wherein the third thin film transistor is a PMOS thin film transistor, and the fourth thin film transistor is an NMOS thin film transistor; or The third thin film transistor is an NMOS thin film transistor, and the fourth thin film transistor is a PMOS thin film transistor. 6. The touch display panel according to claim 4, wherein the self-capacitance time-division detection circuit is located on the first substrate. 7. The touch display panel according to claim 6, wherein the touch display panel further comprises: a first flexible circuit board, the first flexible circuit board is bound on the first substrate; The first drive integrated circuit located on the first flexible circuit board, the second end of the metal line and the second control signal line are respectively electrically connected to the first drive integrated circuit; a second flexible circuit board, the second flexible circuit board is bound on the second substrate; The second drive integrated circuit located on the second flexible circuit board, the second end of the first control signal line and the shift register unit are respectively electrically connected to the second drive integrated circuit. 8. The touch display panel according to claim 6, wherein the touch display panel further comprises: a first flexible circuit board, the first flexible circuit board is bound on the first substrate; The first drive integrated circuit located on the first flexible circuit board, the second end of the metal line and the second control signal line are respectively electrically connected to the first drive integrated circuit; The second driver integrated circuit located on the second substrate, the second end of the first control signal line and the shift register unit are respectively electrically connected to the second driver integrated circuit. 9. The touch display panel according to claim 4, wherein the self-capacitance time-division detection circuit is located on the second substrate. 10. The touch display panel according to claim 9, wherein the touch display panel further comprises: a first flexible circuit board, the first flexible circuit board is bound on the second substrate; The first driver integrated circuit located on the first flexible circuit board; wherein, the second end of the metal line, the second end of the first control signal line, the second end of the second control signal line and The shift register units are respectively electrically connected to the first driving integrated circuits. 11. The touch display panel according to claim 3, wherein the touch display panel comprises: a first flexible circuit board, the first flexible circuit board is bound on the first substrate; a first driver integrated circuit located on the first flexible circuit board, the second end of the first touch electrode signal line is electrically connected to the first driver integrated circuit; a second flexible circuit board, the second flexible circuit board is bound on the second substrate; The second drive integrated circuit located on the second flexible circuit board, the first control signal line, the second end of the self-capacitance scanning signal line and the shift register unit are respectively integrated with the second drive The circuit is electrically connected. 12. A touch display device, comprising the touch display panel according to any one of claims 1-11.