Touch devices, control methods therefor, matrix substrates and liquid crystal display panels

Abstract

A touch device comprising: a plurality of touch electrodes (12) and a touch circuit (14); wherein the touch electrodes (12) are each connected to a plurality of interfaces on the touch circuit (14) through touch sensing lines (13); and a switch is provided on the touch sensing line (13) corresponding to each of at least one of the touch electrodes (12); wherein the switch has a first operating state in which the switch is on and a second operating state in which the switch is off, and the switch is configured to establish and interrupt the connection between each of at least one of the touch electrodes (12) and the respective one of the plurality of interfaces on the touch circuit (14) as a function of the first operating state and the second operating state of the switch; wherein each of at least one of the touch electrodes (12) has at least two sub-electrodes (12a, 12b) which are electrically insulated from each other, and each of the at least two sub-electrodes (12a, 12b) of a respective one of at least one of the touch electrodes (12) is connected to a respective one of the interfaces by the touch sensing line (13), wherein each of the interfaces corresponds to a respective one of the at least one of the touch electrodes (12), and the switch is provided on the touch sensing line (13) which corresponds to at least one of the sub-electrodes of the respective one of at least one of the touch electrodes (12); wherein in a first operating state of the touch device, one of the sub-electrodes (12a; 12b) of each of at least one of the touch electrodes (12) is in the touch detection state; and wherein in a second operating state of the touch device, all of the sub-electrodes (12a; 12b) of each of at least one of the touch electrodes (12) are in a touch detection state.

Description

TECHNICAL FIELD

[0001] The present invention relates to the field of touch sensing technology, particularly to touch devices, touch device driving methods, matrix substrates, and liquid crystal display panels. BACKGROUND

[0002] Currently, a display panel with a touch sensing function has become a predominant display product. So far, a touch panel can be integrated with a display panel in various ways, resulting in an in-cell display panel, an on-cell display panel, and an add-on display panel. Furthermore, depending on their working principles, display panels with a touch sensing function include a capacitive touch display panel, a resistive touch display panel, an infrared touch display panel, etc. Capacitive touch display panels include a self-capacitive touch display panel and a counter-capacitive touch display panel.In self-capacitive touch displays, electrodes configured for the touch sensing function are typically located in an outer substrate of the display panel, which allows the self-capacitive touch display panel to have a thin overall thickness and a lightweight design. Capacitive touch displays have the disadvantages of high power consumption and slow touch sensing.

[0003] US 2008 / 0 062 148 A1 discloses liquid crystal display (LCD) touch screens that integrate the touch-sensing elements with the display circuitry. This integration can take a variety of forms. Touch-sensing elements can be implemented entirely within the LCD assembly, but outside (not between) the color filter plate and the matrix plate. Alternatively, some touch-sensing elements can be between the color filter and matrix plates, with other touch-sensing elements not between the plates. In another alternative, all touch-sensing elements can be between the color filter and matrix plates. The final alternative can include both conventional and IPS (in-plane switching) LCDs. In some forms, one or more display structures can also include a touch-sensing function.Techniques for making and operating such displays as well as various devices embodying such displays are also disclosed.

[0004] WO 2015 / 051586 A1 discloses an array substrate comprising a substrate, a plurality of transistors arranged on the substrate, first transparent electrodes electrically connected to drain electrodes of the transistors, and second transparent electrodes arranged between the first transparent electrodes and the substrate. The first transparent electrodes comprise a plurality of electrically connected strip electrodes, the second transparent electrodes comprise a plurality of mutually insulating electrode groups, each electrode group comprises two mutually insulating, nested, and complementary sub-electrodes arranged in the same layer, and each sub-electrode corresponds to the plurality of first transparent electrodes.Within a first predetermined time, the sub-electrodes are common electrodes, and within a second predetermined time, the sub-electrodes are touch control electrodes. A matrix substrate control method and a liquid crystal display device including the matrix substrate are also provided. The matrix substrate integrates a touch control function, realizes a display function and the touch control function through time division, and simplifies the structure of a liquid crystal display device. SUMMARY

[0005] The present invention provides a touch device according to independent claim 1, a driving method for the touch device according to independent claim 11, a matrix substrate according to independent claim 13, and a liquid crystal display panel according to independent claim 17. A switch is provided on the touch sensing line corresponding to the touch electrode, and the operating state of the switch controls the operating state of the touch device. In the case of touch sensing, the operating state of the switch is adjusted to control the number of touch sensing electrodes for touching. When fewer touch electrodes are operating, the total capacitance of the touch electrodes is smaller, thereby improving the speed of touch sensing. Further improvements and embodiments are described in the dependent claims.

[0006] In order to implement the above-described design, the present invention adopts the following technical solutions.

[0007] In one aspect, a touch device is provided comprising a plurality of touch electrodes and a touch circuit; wherein the touch electrodes are each connected to a plurality of interfaces on the touch circuit through touch sensing lines; and a switch is provided on the touch sensing line corresponding to each of at least one of the touch electrodes; wherein the switch has a first operating state in which the switch is on and a second operating state in which the switch is off.

[0008] In another aspect, there is provided a driving method for the touch device, comprising: Determining whether the switch is to be switched to the first operating state or the second operating state;

[0009] Turning on the switch if it is determined to switch the switch to the first working state, so that the touch circuit outputs a touch drive signal to the touch sensing line corresponding to the turned-on switch; and

[0010] Turning off the switch if it is determined to switch the switch to the second working state so that the touch circuit stops outputting the touch drive signal to the touch sensing line corresponding to the turned off switch.

[0011] In a further aspect, an array substrate is provided having any of the above-described touch devices, wherein the touch electrodes of the touch device are shared from a common electrode of the array substrate.

[0012] Finally, a liquid crystal display panel is provided which comprises a color filter substrate and the matrix substrate described above.

[0013] The present invention has at least one of the following advantageous effects: A switch is provided on the touch sensing line corresponding to the touch electrode, and the operating state of the switch controls the operating state of the touch device. In the case of touch sensing, the operating state of the switch is adjusted to control the number of touch sensing electrodes for touching. When fewer touch electrodes are operating, the total capacitance of the touch electrodes is smaller, thereby improving the speed of touch sensing. DESCRIPTION OF THE DRAWINGS

[0014] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used to describe the embodiments of the present invention are briefly presented below. The drawings used in the following description obviously show only some embodiments of the invention, and other drawings can be obtained from the described drawings by those skilled in the art without any creative effort. Fig. 1 is a schematic diagram showing an arrangement of switches in a touch device according to an embodiment of the present invention. Fig. 2 is a schematic diagram showing another arrangement of touch electrodes and switches in a touch device according to an embodiment of the present invention. Fig. 3 is a schematic diagram showing another arrangement of touch electrodes and switches in a touch device according to an embodiment of the present invention. Fig. 4 is a schematic diagram showing another arrangement of touch electrodes and switches in a touch device according to an embodiment of the present invention. Fig. 5 is a schematic diagram showing another arrangement of touch electrodes and switches in a touch device according to an embodiment of the present invention. Fig. 6 is a schematic diagram showing another arrangement of touch electrodes and switches in a touch device according to an embodiment of the present invention. Fig. 7 shows an example of the overall structure of the touch device according to an embodiment of the present invention. Fig. 8 is a flowchart of an implementation of a driving method for the touch device according to an embodiment of the present invention. Fig. 9 is a flowchart of another implementation of a driving method for the touch device according to an embodiment of the present invention. Fig. 10 is a schematic diagram showing the structure of a matrix substrate according to an embodiment of the present invention. Fig. 11 is a schematic diagram showing the structure of a liquid crystal display panel according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0015] To clarify the objects, technical solutions, and advantages of the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in combination with the embodiments of the present invention. Obviously, only some, rather than all, embodiments of the present invention are described herein. All other embodiments obtained in light of the described embodiments of the invention by those skilled in the art without any creative effort should be considered to fall within the scope of the present invention.

[0016] Fig. 1 is a schematic diagram showing the arrangement of switches in a touch device according to an embodiment of the present invention. As shown in Fig. 1, the touch device includes a plurality of touch electrodes 12 and a touch circuit 14.

[0017] The touch electrodes 12 are each connected to a plurality of interfaces on the touch circuit 14 through touch sensing lines 13, and a switch is provided on the touch sensing line 13 corresponding to each of at least one of the touch electrodes 12. The switch has a first operating state and a second operating state, with the switch being on in the first operating state and off in the second operating state.

[0018] Due to the arrangement of the switches with the first working state and the second working state, a working state of the touch device depends on the working states of the switches, and in particular, the working state of the touch device depends on the ratio of effective touch electrodes. For example, under a normal working state, a touch sensing operation is performed by all of the touch electrodes 12; but under a low-power working state, the touch sensing operation is performed by a portion of the touch electrodes 12. Accordingly, under the normal working state, all or most of the switches are in the first working state, but under the low-power working state, half or more of the switches are in the second working state.Of course, other configurations are possible; for example, it is possible for 60% of the switches to be in the second operating state under the low-power operating state. As shown in . Fig. 1, under the normal working state, the switches on the touch sensing lines 13 represented by both solid lines and dashed lines are in the first working state; and under the low power consumption working state, the switches on the touch sensing lines 13 represented by the solid lines are in the first working state and the switches on the touch sensing lines 13 represented by the dashed lines are in the second working state, or the switches on the touch sensing lines 13 represented by the dashed lines are in the first working state and the switches on the touch sensing lines 13 represented by the solid lines are in the second working state.As such, under the low power consumption working state, the touch circuit 14 sends touch drive signals to only one half of the touch electrodes 12, thereby reducing the power consumption in the touch phase by approximately one half.

[0019] The embodiment has been described above. In another actual setting of the working state of the touch device, under the low-power consumption working state, only one touch electrode 12 from each group of touch electrodes 12 arranged as a 2×2 matrix is ​​maintained in the active state, or rows or columns of touch electrodes 12 corresponding to the on switches alternate with rows or columns of touch electrodes 12 corresponding to the off switches. Furthermore, under the low-power consumption working state, fewer switches corresponding to the touch electrodes 12 may be turned on to achieve lower power consumption, as long as the touch sensing function can be maintained. The size of the touch electrodes 12 may vary with different product requirements and manufacturing processes.If the touch electrodes 12 each have a comparatively large area, the proportions of the switches in the second operating state cannot be small, otherwise, a large area of ​​the touch surface of the touch device without touch electrodes 12 exists in the active state and could cause an error in the touch operation; on the other hand, if the touch electrodes 12 have a small area, the proportion of the switches in the second operating state can be smaller, as long as a large area with consecutive touch electrodes 12 corresponding to the off switches is avoided.

[0020] Fig. Figure 2 is a schematic diagram showing an arrangement of touch electrodes and switches in a touch device according to an embodiment of the present invention. The touch device in the present embodiment is based on the previous embodiment, but at least one of the touch electrodes 12 has at least two sub-electrodes that are electrically isolated from each other, and the at least two sub-electrodes are both connected to an interface (on the touch circuit 14) corresponding to the touch electrode 12 (which has the at least two sub-electrodes) by the touch sensing lines 13, respectively, as shown in Fig. 2 shown.

[0021] Here, each of the touch electrodes 12 has two partial electrodes that are electrically insulated from each other.

[0022] Generally, the touch electrodes 12 are arranged in a matrix, and the touch circuit 14 for driving the touch electrodes 12 to detect a touch is arranged below the matrix. In the following detailed description of the touch device, the arrangement of the touch circuit 14 below the matrix is ​​used as a reference for distinguishing a row from a column, for distinguishing top from bottom, and for distinguishing left from right. In the present embodiment, the touch electrode 12 has at least two sub-electrodes electrically insulated from each other, each of the sub-electrodes is connected to the interface corresponding to the touch electrode 12 via a touch-detection line 13, and a switch is provided on the touch-detection line 13 corresponding to each of at least one sub-electrode of the touch electrode 12.In this way, during touch sensing under the low-power consumption working state, the number of sub-electrodes for touch sensing, that is, the number of sub-electrodes in the first working state, can be adjusted by the switches. If its sub-electrodes enabled for touch sensing are reduced, the touch electrode 12 has a reduced capacitance, thereby improving the speed of touch sensing and reducing power consumption. Particularly, in the case of a depleted battery in the device, if only one of the sub-electrodes of each touch electrode 12 is enabled for touch sensing, the speed of touch sensing can be effectively improved and the power consumption for touch sensing is reduced.

[0023] Compared with the previous embodiment, the arrangement of the sub-electrodes in the present embodiment can further ensure implementation of the touch sensing function.Assuming, for example, that each touch electrode 12 has an area of ​​1 unit and the sub-electrode has an area of ​​1 / 2 unit, in the previous embodiment, when one half of the switches are turned off, and thus one half of the touch electrodes 12 operate in the active state, one half of the touch area of ​​the touch device is idle during touch sensing, and the minimum idle area in the touch area has an area of ​​1 unit; whereas, in the present embodiment, if one half of the switches are turned off to deactivate one of two sub-electrodes in each touch electrode 12, then one half of the touch area of ​​the touch device is still idle during touch sensing, but the minimum idle area in the touch area has an area of ​​1 / 2 unit.In other words, in the present embodiment, a large-area idle region will not occur, so touch sensing is more stable. If the deactivated touch electrodes 12 (or sub-electrodes) are evenly distributed in the previous embodiment and the present embodiment, the touch signal may be intense, but a touch sensing error occasionally occurs in the present embodiment. However, the touch sensing function can be well implemented, although in the present embodiment, the touch from only a single sub-electrode is less intense.

[0024] In the Fig. 2, the normal working state and the low power consumption working state can be implemented as in the previous embodiment in such a manner that: switches 15a and 15b corresponding to one of any two adjacent touch electrodes 12 are both switched to the second working state, and switches 15a and 15b corresponding to the other of the two adjacent touch electrodes 12 are both switched to the first working state, so that the implementation principle of the low power consumption working state is the same as in the previous embodiment.

[0025] In particular, two partial electrodes of each touch electrode 12 are arranged symmetrically.

[0026] Optionally, two partial electrodes of each touch electrode 12 are arranged one on top of the other.

[0027] Generally, each touch electrode 12 includes two sub-electrodes. Therefore, the resulting product including such touch electrodes 12 is simple in structure and wiring, has a small number of switches, and can be manufactured in a simple manufacturing process. Furthermore, only one of the switches corresponding to each sub-electrode 12 needs to be operated in actual use. As such, providing two or more sub-electrodes for each touch electrode 12 can implement the touch sensing function with higher accuracy and meet diverse touch accuracy requirements for different working conditions.

[0028] In one variant, the two sub-electrodes of touch electrode 12 are not symmetrical. For example, one of the two sub-electrodes has a size of 2 / 3 the size of touch electrode 12, and the other of the two sub-electrodes has a size of 1 / 3 the size of touch electrode 12, with the former providing a more intense touch signal than the latter.

[0029] In the present embodiment, the two sub-electrodes of each touch electrode 12 are described as symmetrical.

[0030] In the embodiment shown in Fig. 2, the touch electrode 12 has two sub-electrodes, that is, a sub-electrode 12a and a sub-electrode 12b. The touch sensing line 13 corresponding to the touch electrode 12 has a sub-sensing line 13a and a sub-sensing line 13b in parallel with each other and connected to the sub-electrode 12a and the sub-electrode 12b, respectively. A switch 15a and a switch 15b are provided. Such an arrangement will also be used in subsequent embodiments. The switches 15a and 15b are respectively connected to the sub-sensing lines. Under the normal operating state of the touch device, the switches 15a and 15b are both in the first operating state, so that a touch drive signal is input via the sub-sensing lines 13a and 13b, respectively.13b is sent to the sub-electrodes 12a and 12b by the touch circuit 14, and touch sensing signals generated on the sub-electrodes 12a and 12b are transmitted via the sub-sensing lines 13a and 13b, then combined on the touch sensing line 13, and returned to the touch circuit 14. For touch sensing in the case of a depleted battery or a power-saving mode of the touch device, one of the switches 15a and 15b is in the first working state and the other is in the second working state. For example, switch 15a is in the second working state, so sub-electrode 12a is not effective in touch sensing, but sub-electrode 12b is used to detect touch in an area corresponding to the sensing electrode 12.Compared with the case where both the sub-electrode 12a and the sub-electrode 12b are used simultaneously for touch detection, touch detection can be performed at an accelerated detection speed by the single sub-electrode because the capacitance of the touch electrode 12 is reduced and the charging time is accordingly shortened. Furthermore, since the touch electrode 12 itself has a small area, touch detection is not affected even though half of the touch area is inactive during touch detection.

[0031] One in Fig. The solution shown in Figure 3 also has the partial electrodes 12a and 12b arranged one above the other, but differs from the solution in Fig. 2 in that only the partial electrode 12b is provided with the switch 15b and the partial electrode 12a is always effective in the touch detection.

[0032] Optionally, two partial electrodes of each touch electrode 12 are distributed horizontally side by side.

[0033] As in Fig. 4, the partial electrodes 12a and 12b are distributed horizontally side by side. Fig. In the solution shown in Figure 4, no switch is provided on the partial detection line 13a, that is, the partial electrode 12a is always effective in touch detection, and the switch 15b arranged on the partial detection line 13b is configured to set the working state of the touch electrode 12. The specific working principle here is similar to that in the Fig. 4 shown solution, which is not further shown here.

[0034] Optionally, two partial electrodes of each touch electrode 12 are distributed diagonally.

[0035] As in Fig. 5, the touch electrode 12 is divided along its diagonal line into sub-electrodes 12a and 12b, and the sub-electrodes 12a and 12b are connected to switches 15a and 15b, respectively. In the present embodiment, alternatively, control of the working state of the touch electrode 12 can be implemented by a switch connected to only one of the sub-electrodes 12a and 12b. In addition, for the touch electrode 12 in a square or rectangular shape, an opening around the center of the touch electrode 12 can divide the touch electrode 12 into two axisymmetric sub-electrodes with the same area. For this purpose, the touch electrode 12 can be divided into two sub-electrodes of the same size in a variety of ways. Similarly, the touch electrode 12 of a rectangular shape can be divided into two sub-electrodes with the same area in a variety of ways by an opening around the center of the touch electrode 12.

[0036] Optionally, two partial electrodes of each touch electrode 12 are distributed within each other.

[0037] As in Fig. 6, the partial electrodes 12a and 12b are distributed within each other and the inner partial electrode 12a is connected to the switch 15a or the outer partial electrode 12b is connected to the switch or both of the partial electrodes 12a and 12b are connected to switches.

[0038] Optionally, a switch is provided on the touch detection line 13 corresponding to each sub-electrode.

[0039] Optionally, a switch is provided on the touch sensing line 13, which corresponds to one of the two sub-electrodes of each touch electrode 12.

[0040] It has been shown above that a switch is provided on the partial detection line corresponding to each partial electrode of the touch electrode 12, or a switch is provided on the partial detection line corresponding to only one of partial electrodes of each touch electrode 12, for example, Fig. 2 and Fig. 5 the former case and show Fig. 3, Fig. 4 and Fig. 6 the latter case.

[0041] Optionally, each touch electrode 12 employs the same distribution of sub-electrodes.

[0042] If each touch electrode 12 uses the same distribution of sub-electrodes, for example in Fig. 2 the partial electrodes 12a and 12b are arranged one above the other, in Fig. 4 the partial electrodes 12a and 12b are arranged horizontally side by side, etc., accordingly the switches are distributed in the same manner, then the manufacturing process can be simplified by such a uniform arrangement and production costs can be reduced and product yield can be improved due to mass production of uniform pieces.

[0043] Optionally, the switch is designed as a thin-film transistor.

[0044] If the switch is implemented as a thin film transistor, one of a source electrode and a drain electrode of the thin film transistor is connected to the partial electrode, the other is connected to an interface of the touch circuit 14, and a gate electrode of the thin film transistor is provided with a level signal to control the thin film transistor to be turned on.

[0045] Fig. 7 shows an example of the overall structure of the touch device. Each touch electrode 12 includes sub-electrodes 12a and 12b. A sub-detection line 13a corresponding to each sub-electrode 12a is connected to a switch 15a, and a sub-detection line 13b corresponding to each sub-electrode 12b is connected to a switch 15b. Each of the switches 15a is electrically connected to one terminal of the touch circuit 14 for outputting a level signal, and each of the switches 15b is electrically connected to another terminal of the touch circuit 14 for outputting a level signal. Under the normal operating state of the touch device, the switches 15a and 15b are both in the first operating state.When the touch device enters the low-power operating state, the touch circuit 14 sends a signal to control all of the switches 15a or the switch 15b to the second operating state, so that only one of the sub-electrodes of each touch electrode 12 is effective for touch sensing. If the touch electrodes 12 function as a common electrode during a display phase, all of the switches are turned on when the common electrode is operating during the display phase.

[0046] An embodiment of the present invention further provides a driving method for the above-described touch device, wherein reference may be made to the above-described embodiments of the touch device for a brief description of the driving method. Fig. 8 is a flowchart of a first implementation of a control method for the touch device according to an embodiment of the present invention. As in Fig. As shown in Figure 8, the method comprises: Step S101 of determining whether the switch is to be switched to the first working state or the second working state; Step S102 of turning on the switch if it is determined to turn the switch into the first working state, so that the touch circuit outputs a touch drive signal to the touch detection line corresponding to the turned-on switch; and Step S103 of turning off the switch if it is determined to turn the switch into the second working state, so that the touch circuit stops outputting the touch drive signal to the touch detection line corresponding to the turned-off switch.

[0047] It should be noted that in the present embodiment, the switch is individually turned on or off, for example, in the first working state, 70% or 80% of the switches are turned on in the first working state; turning off the switches in the second working state will be described in comparison with the first working state, that is, at least a part of the switches turned on in the first working state are turned off in the second working state.

[0048] Fig. 9 is a flowchart of a second implementation of a driving method for the touch device according to an embodiment of the present invention. In the touch device of the present embodiment, the touch electrodes are separated from the common electrode, and the touch sensing lines function as connection lines to the common electrode. As shown in Fig. As shown in Figure 9, the method comprises: Step S201 of determining whether the switch is to be switched to the first working state or the second working state in a touch phase; Step S202 of turning on the switch if it is determined to turn the switch into the first working state, so that the touch circuit outputs a touch drive signal to the touch detection line corresponding to the turned-on switch; Step S203 of turning off the switch if it is determined to turn the switch into the second working state, so that the touch circuit stops outputting the touch drive signal to the touch detection line corresponding to the turned-off switch; and Step S204 of turning on all of the switches in a display phase so that a display circuit outputs a common voltage to the touch sensing lines.

[0049] An embodiment of the present invention further provides a matrix substrate 1 having the above-described touch device. The touch electrodes 12 of the touch device are shared from a common electrode of the matrix substrate 1. That is, during the display phase, a common voltage signal is supplied to the touch electrodes 12 to implement a display function of the matrix substrate 1, and during the touch phase, touch drive signals are supplied to the touch electrodes 12 to implement a touch sensing function of the matrix substrate 1.

[0050] The switches and the thin film transistors in the matrix substrate 1 for controlling the orientation of a liquid crystal are manufactured in the same manufacturing process.

[0051] Furthermore, the touch sensing line 13 can function as a connection line to the common electrode. In particular, as shown in Fig. 10, a touch circuit 14 and a display circuit 16 are both connected to the touch electrode 12 by the touch sensing line 13, so that the touch electrode 12 is used by the touch circuit 14 and the display circuit 16 in a time-sharing manner. As such, the touch sensing by the touch circuit 14 alternates with the application of the common voltage by the display circuit 16. The solution of dividing the common electrode into a plurality of touch electrodes 14 is known in the art and will not be further described herein.

[0052] In the display phase, the display circuit 16 needs to drive the liquid crystal to rotate, therefore the common voltage must be applied to the entire common electrode, that is, all sub-electrodes must be in the effective working state, therefore all switches are turned on.

[0053] An embodiment of the present invention further provides a liquid crystal display panel comprising a color filter substrate 2 and the matrix substrate 1 described above.

[0054] An integrated circuit of the liquid crystal display panel is arranged in a non-display area 17 of the liquid crystal display panel and is connected to the touch sensing lines 13.

[0055] In particular, with reference to Fig. 7, Fig. 10 and Fig.11, the liquid crystal display panel includes a color filter substrate 2 and the above-described matrix substrate 1. The matrix substrate 1 has a display area 11 and a non-display area 17, and a touch circuit 14, a display circuit 16, and other integrated circuits for implementing auxiliary functions are arranged in the non-display area 17. The non-display area 17 refers to a region of the matrix substrate 1 other than the display area 11.

[0056] Technical principles of the present invention are described above in combination with embodiments. These descriptions are intended only to explain the principle of the present invention, but should not be considered as limiting the scope of the present invention in any way. Based on the explanation described herein, other embodiments can be obtained by those skilled in the art without any creative effort and fall within the scope of the present invention.

Claims

[1] A touch device comprising: a plurality of touch electrodes (12) and a touch circuit (14); wherein the touch electrodes (12) are each connected to a plurality of interfaces on the touch circuit (14) through touch sensing lines (13); and a switch is provided on the touch sensing line (13) corresponding to each of at least one of the touch electrodes (12); wherein the switch has a first operating state in which the switch is on and a second operating state in which the switch is off, and the switch is configured to establish and interrupt the connection between each of at least one of the touch electrodes (12) and the respective one of the plurality of interfaces on the touch circuit (14) as a function of the first operating state and the second operating state of the switch; wherein each of at least one of the touch electrodes (12) has at least two sub-electrodes (12a, 12b) which are electrically insulated from each other, and each of the at least two sub-electrodes (12a, 12b) of a respective one of at least one of the touch electrodes (12) is connected to a respective one of the interfaces by the touch sensing line (13), wherein each of the interfaces corresponds to a respective one of the at least one of the touch electrodes (12), and the switch is provided on the touch sensing line (13) which corresponds to at least one of the sub-electrodes of the respective one of at least one of the touch electrodes (12); wherein in a first operating state of the touch device, one of the sub-electrodes (12a; 12b) of each of at least one of the touch electrodes (12) is in the touch detection state; and wherein in a second operating state of the touch device, all of the sub-electrodes (12a; 12b) of each of at least one of the touch electrodes (12) are in a touch detection state. [2] The touch device of claim 1, wherein the at least one of the touch electrodes (12) each comprises two sub-electrodes (12a, 12b) which are electrically insulated from each other. [3] The touch device of claim 2, wherein the two partial electrodes (12a, 12b) of the touch electrode (12) are arranged symmetrically. [4] The touch device of claim 2 or 3, wherein the two partial electrodes (12a, 12b) of the touch electrode (12) are arranged diagonally. [5] The touch device of claim 2 or 3, wherein the two partial electrodes (12a, 12b) of the touch electrode (12) are arranged one inside the other. [6] The touch device of any one of claims 1 to 5, wherein a switch is provided on the touch sensing line (13) corresponding to each sub-electrode (12a, 12b). [7] The touch device of any one of claims 1 to 5, wherein a switch is provided on the touch detection line (13) corresponding to one of two sub-electrodes (12a, 12b) of each touch electrode (12). [8] The touch device of any one of claims 1 to 5, wherein the sub-electrodes (12a, 12b) of each touch electrode (12) are arranged in the same manner. [9] The touch device of any one of claims 1 to 5, wherein the switch is a thin film transistor. [10] The touch device of any one of claims 1 to 5, wherein the touch electrode (12) is rectangular. [11] A driving method for the touch device of any one of claims 1 to 10, comprising: Determining whether the switch is to be switched to the first operating state or the second operating state; Turning on the switch if it is determined to switch the switch to the first operating state, so that the touch circuit (14) outputs a touch control signal to a touch detection line (13) corresponding to the switched-on switch; and Turning off the switch if it is determined to switch the switch to the second working state, so that the touch circuit (14) stops outputting the touch drive signal to the touch detection line (13) corresponding to the turned-off switch. [12] The driving method of claim 11, wherein the touch electrodes (12) are divided from a common electrode and the touch detection line (13) is operable as a connection line to the common electrode; the driving method comprising: Determining whether the switch is to be switched to the first operating state or the second operating state in a touch phase; Turning on the switch if it is determined to switch the switch to the first operating state, so that the touch circuit (14) outputs a touch drive signal to a touch detection line (13) corresponding to the turned-on switch; Turning off the switch if it is determined to switch the switch to the second operating state, so that the touch circuit (14) stops outputting the touch drive signal to the touch detection line (13) corresponding to the turned-off switch; and Turning on all of the switches in a display phase so that a display circuit (16) outputs a common voltage to the touch sensing lines (13). [13] A matrix substrate comprising a touch device of any one of claims 1 to 10, wherein touch electrodes (12) of the touch device are divided from a common electrode of the matrix substrate. [14] The matrix substrate of claim 13, wherein the touch sensing line (13) is operable as a connection line to the common electrode. [15] The matrix substrate of claim 13, wherein each switch disposed on the touch sensing line (13) is turned on when the common electrode operates in a display phase. [16] The matrix substrate of claim 13, wherein the switches and the thin film transistors in the matrix substrate for controlling an orientation of a liquid crystal are manufactured in the same manufacturing process. [17] A liquid crystal display panel comprising: a color filter substrate (2) and the matrix substrate (1) of any one of claims 13 to 16. [18] The liquid crystal display panel of claim 17, wherein an integrated circuit of the liquid crystal display panel is arranged in a non-display region (17) of the liquid crystal display panel, and the integrated circuit is connected to the touch sensing lines (13).

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