CN103699283A - Touch screen, drive method of touch screen, and display device - Google Patents
Touch screen, drive method of touch screen, and display device Download PDFInfo
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- CN103699283A CN103699283A CN201310731866.5A CN201310731866A CN103699283A CN 103699283 A CN103699283 A CN 103699283A CN 201310731866 A CN201310731866 A CN 201310731866A CN 103699283 A CN103699283 A CN 103699283A
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Abstract
The invention discloses a touch screen, a drive method of the touch screen, and a display device. The touch screen comprises a first substrate and a second substrate opposite to each other. The first substrate comprises a first substrate body provided with a conductive pattern, a touch switch tube and a touch sensing wire, the touch sensing wire receives sensing signals which are output by the conductive pattern through the touch switch tube. The conductive pattern is connected with the touch sensing wire through the touch switch tube. The second substrate comprises a second substrate body. The second substrate body is provided with a support and a common electrode which is connected with the support and which provides the support with common electrode signals. The support is opposite to the conductive pattern. A touch capacitor is formed between the support and the conductive pattern. Setting a touch emission line on the touch screen is avoided, and accordingly the structure of the touch screen is simplified.
Description
Technical Field
The invention relates to the technical field of display, in particular to a touch screen, a driving method thereof and a display device.
Background
At present, touch technologies are gradually developing toward low cost, high yield, large size, high reliability, and the like. In order to achieve the above object, in the manufacturing process technology, an ITO sensor (ITOSensor), a Cover plate (Cover lens) and a Thin Film Transistor (TFT) may be manufactured integrally to reduce the production cost of the touch panel and to reduce the thickness of the touch panel, so as to avoid the problem of poor bonding in the bonding process; in material technology, ITO organic or inorganic substitute materials can be developed, flexible thin films and substrate technology can be mastered, or new plastic materials are adopted to substitute for expensive strengthened glass or polymethyl methacrylate (PMMA) plastic plates on the cover plate material; in terms of structure technology, an Add on Mode Touch Panel (Add on Touch Panel), an overlay surface Touch Panel (OnCell Touch Panel) and an In-Cell Touch Panel (In Cell Touch Panel) have been developed, In which the In-Cell Touch Panel has high integration level, low yield, thin overall thickness and light weight.
In the prior art, an in-cell touch screen may include: a photosensitive touch screen, a capacitive touch screen, or a resistive touch screen. Fig. 1 is a schematic structural diagram of a capacitive touch screen in the prior art, and as shown in fig. 1, the capacitive touch screen includes: the touch screen comprises an upper substrate 1 and a lower substrate 2 which are arranged oppositely, a liquid crystal layer 3 is arranged between the upper substrate 1 and the lower substrate 2, a backlight source 4 is arranged on the back of the lower substrate 2, after a user presses the upper substrate 1, the thickness of the liquid crystal layer 3 at the pressing position changes, and a corresponding liquid crystal capacitance value changes, wherein one end of the liquid crystal capacitance is connected with a touch emitting line, the other end of the liquid crystal capacitance is connected with a touch sensing line, and the position of the changed liquid crystal capacitance is obtained by judging the voltage value output by the touch sensing line, so that the position of a touch.
In the prior art, an embedded touch screen needs to be provided with a touch emitting line and a touch sensing line, so that the structure of the touch screen is complex.
Disclosure of Invention
The invention provides a touch screen, a driving method thereof and a display device, which are used for simplifying the structure of the touch screen.
In order to achieve the above object, the present invention provides a touch panel, including: the first substrate and the second substrate are oppositely arranged;
the first substrate comprises a first substrate base plate, a conductive pattern, a touch switch tube and a touch induction line for receiving a sensing signal output by the conductive pattern through the touch switch tube are formed on the first substrate base plate, and the conductive pattern is connected with the touch induction line through the touch switch tube;
the second substrate comprises a second substrate base plate, a support and a common electrode which is connected with the support and provides a common electrode signal for the support are formed on the second substrate base plate, the support and the conductive pattern are oppositely arranged, and a touch capacitor is formed between the support and the conductive pattern.
Optionally, the first substrate is an array substrate, and the first substrate includes: the pixel structure comprises a grid line and a data line which are formed on a first substrate, wherein the grid line and the data line define a pixel subunit;
the grid electrode of the touch switch tube is electrically connected with the grid line, the source electrode of the touch switch tube is electrically connected with the touch sensing line, and the drain electrode of the touch switch tube is electrically connected with the conductive pattern.
Optionally, the touch sensing line and the data line are disposed on the same layer, and the touch switch tube is formed on the gate line.
Optionally, the touch sensing lines and the gate lines are disposed on the same layer, and the touch switching tubes are formed on the gate lines and the touch sensing lines adjacent to the gate lines.
Optionally, a gate of the touch switch tube is a partial structure of the gate line, a source of the touch switch tube is a partial structure of the touch sensing line, an active layer pattern of the touch switch tube is located on the gate line, and the source is connected with the active layer pattern through a connection pattern crossing over the gate line and the touch sensing line.
Optionally, the first substrate further includes: the touch control induction line is connected with the virtual line through the virtual line switch tube, and the virtual line is grounded.
Optionally, the second substrate is a color film substrate, and the second substrate includes: and the common electrode is positioned on the black matrix pattern and the color matrix pattern.
Optionally, the support is a conductive spacer, and the support is formed on the common electrode; or,
the support is a non-conductive spacer, and the common electrode is formed on the support.
To achieve the above object, the present invention provides a display device including: the touch screen is provided.
In order to achieve the above object, the present invention provides a driving method of a touch screen, where the touch screen includes: the touch control circuit comprises a first substrate and a second substrate which are oppositely arranged, wherein the first substrate comprises a first substrate, a conductive pattern, a touch control switch tube and a touch control induction line are formed on the first substrate, the conductive pattern is connected with the touch control induction line through the touch control switch tube, the second substrate comprises a second substrate, a support and a common electrode connected with the support are formed on the second substrate, the support and the conductive pattern are oppositely arranged, and a touch control capacitor is formed between the support and the conductive pattern;
the method comprises the following steps:
the common electrode provides a common electrode signal to the support;
the conductive pattern outputs a sensing signal to the touch sensing line through the touch switch tube.
The invention has the following beneficial effects:
according to the touch screen, the driving method thereof and the display device, the touch capacitance is formed between the conductive pattern in the first substrate and the support in the second substrate, the common electrode provides a common electrode signal for the support forming one end of the touch capacitance, and the common electrode serves as a touch emission line to provide the common electrode signal for the touch capacitance, so that the touch emission line is prevented from being arranged on the touch screen, and the structure of the touch screen is simplified.
Drawings
Fig. 1 is a schematic structural diagram of a capacitive touch screen in the prior art;
fig. 2 is a schematic structural diagram of a touch screen according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of the first substrate shown in FIG. 2;
FIG. 4 is a schematic diagram illustrating an equivalent circuit of the touch screen of FIG. 2;
fig. 5 is a schematic structural diagram of a first substrate according to a second embodiment of the invention;
FIG. 6 is a timing diagram of gate signals of the touch screen according to the second embodiment;
fig. 7 is a schematic structural diagram of a first substrate according to a third embodiment of the invention;
FIG. 8 is a timing diagram of gate signals of a touch screen according to a third embodiment;
fig. 9 is a schematic structural diagram of a touch screen according to a fourth embodiment of the present invention.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the touch screen, the driving method thereof, and the display device provided by the present invention are described in detail below with reference to the accompanying drawings.
Fig. 2 is a schematic structural diagram of a touch screen according to an embodiment of the present invention, and as shown in fig. 2, the touch screen includes: the first substrate and the second substrate are oppositely arranged.
The first substrate comprises a first substrate 11, a conductive pattern 12, a touch switch tube and a touch sensing line for receiving a sensing signal output by the conductive pattern through the touch switch tube are formed on the first substrate 11, and the conductive pattern 12 is connected with the touch sensing line through the touch switch tube.
The second substrate includes a second substrate 13, a support 14 and a common electrode 15 connected to the support 14 and providing a common electrode signal to the support 14 are formed on the second substrate 13, the support 14 and the conductive pattern 12 are disposed opposite to each other, and a touch capacitor 16 is formed between the support 14 and the conductive pattern 12.
In this embodiment, the common electrode 15 serves as a touch emitting line, and the emitting signal provided by the common electrode 15 to the support 14 is a common electrode signal.
In the embodiment, the support 14 is a conductive spacer, and the support 14 is formed on the common electrode 15. And the common electrode 15 is formed on the second substrate 13. The conductive spacer may be made by adding conductive particles to an organic insulating material, for example: the conductive particles may be gold balls.
In this embodiment, preferably, the first substrate may be an array substrate, the second substrate may be a color filter substrate, and a liquid crystal layer 17 is disposed between the first substrate and the second substrate.
Optionally, a passivation layer 18 is disposed on the first substrate 11, and the passivation layer 18 is disposed on the conductive pattern 12, and the passivation layer 18 can protect the conductive pattern 12 and also can prevent the conductive pattern 12 and the support 14 from contacting each other.
Optionally, a non-conductive spacer 19 may be further disposed between the first substrate and the second substrate, and the non-conductive spacer 19 may support the first substrate and the second substrate. Specifically, the non-conductive spacer 19 may be formed on the common electrode 15. Wherein the non-conductive spacer may be made of an organic insulating material.
Fig. 3 is a schematic structural diagram of the first substrate in fig. 2, and as shown in fig. 2 and fig. 3, in this embodiment, the first substrate is an array substrate, and the first substrate includes: gate and data lines 20 and 21 are formed on the first substrate 11, and the gate and data lines 20 and 21 define a pixel sub-unit 22. A thin film transistor 23 and a pixel electrode 24 are formed in each pixel sub-unit 22. In this embodiment, the touch switch tube 25 is a thin film transistor, the gate of the touch switch tube 25 is electrically connected to the gate line 20, the source of the touch switch tube 25 is electrically connected to the touch sensing line 26, and the drain of the touch switch tube 25 is electrically connected to the conductive pattern 12. Three pixel sub-units 22 may form one pixel unit, for example: the three pixel sub-units 22 respectively correspond to the red matrix pattern, the green matrix pattern and the blue matrix pattern on the color film substrate. A part or each pixel unit corresponds to one conductive pattern 12 and one touch switch tube 25, and in this embodiment, each pixel unit corresponds to one conductive pattern 12 and one touch switch tube 25, as shown in fig. 3, the conductive pattern 12 and the touch switch tube 25 are formed in one pixel sub-unit 22 of the pixel unit. The touch sensing lines 26 are disposed on the same layer as the data lines 21, and the touch sensing lines 26 are parallel to the data lines 21.
The second substrate is a color film substrate, and the second substrate includes: a black matrix pattern 44 and a color matrix pattern formed on the second substrate 13, and a common electrode 15 is positioned on the black matrix pattern 44 and the color matrix pattern. The color matrix pattern may include a red matrix pattern 41, a green matrix pattern 42, or a blue matrix pattern 43, and the red matrix pattern 41, the green matrix pattern 42, and the blue matrix pattern 43 are sequentially arranged on the second substrate 13. Preferably, the support 14 is formed on the common electrode 15 above the black matrix pattern 44. Further, the second substrate may further include: a planarization layer 45, wherein the planarization layer 45 is formed on the red matrix pattern 41, the green matrix pattern 42, the blue matrix pattern 43 and the black matrix pattern 44, and the common electrode 15 is formed on the planarization layer 45.
Fig. 4 is a schematic diagram illustrating an equivalent circuit principle of the touch screen in fig. 2, and as shown in fig. 2, fig. 3 and fig. 4, the touch capacitor 16 is a variable capacitor, one end (i.e., the support) of the touch capacitor 16 is connected to the common electrode 15, the other end (i.e., the conductive pattern) of the touch capacitor 16 is connected to the touch sensing line 26 through the touch switch tube 25, and the touch sensing line 26 is connected to the peripheral signal processor 27. When the gate line outputs a gate signal, the touch switch 25 is turned on under the control of the gate signal, and the gate signal may be a high level signal. The touch capacitor 16 is connected to the touch sensing line 26 through the turned-on touch switch tube 25. The common electrode 15 provides a common electrode signal Vcom to one end of the touch capacitor 16, the other end of the touch capacitor 16 outputs a sensing signal to the touch sensing line 26, the touch sensing line 26 outputs the sensing signal to the signal processor 27, and the signal processor 27 compares the sensing signal with the reference signal Vref, so as to determine whether a touch occurs and a position of a touch point when the touch occurs. When a touch occurs, the capacitance value of the touch capacitor 16 changes, the voltage difference between two ends of the touch capacitor 16 changes, and thus the output sensing signal changes, the touch sensing line 26 outputs the changed sensing signal to the signal processor 27, and the signal processor 27 compares the sensing signal with the reference signal Vref, so as to determine the touch occurrence and the touch point position.
In the touch screen provided by this embodiment, a touch capacitor is formed between the conductive pattern in the first substrate and the support in the second substrate, the common electrode provides a common electrode signal to the support forming one end of the touch capacitor, and the common electrode serves as a touch emission line to provide the common electrode signal to the touch capacitor, so that the touch emission line is prevented from being arranged on the touch screen, and the structure of the touch screen is simplified. The touch screen of the embodiment has strong anti-interference capability, so that the touch screen can be applied to a large-size touch screen.
An embodiment of the present invention provides a touch screen, where the touch screen is different from the touch screen in the embodiment one in that: the first substrate has a different structure. Fig. 5 is a schematic structural diagram of a first substrate according to a second embodiment of the present invention, and as shown in fig. 5, in this embodiment, the first substrate is an array substrate, and the first substrate includes: a gate line 20 and a data line 21 formed on a first substrate (not shown), the gate line 20 and the data line 21 defining a pixel sub-unit 22. The pixel sub-unit 22 includes a thin film transistor 23 and a pixel electrode 24, wherein the thin film transistor 23 is formed on the gate line 20. The touch sensing lines 26 are disposed on the same layer as the data lines 21, the touch sensing lines 26 are parallel to the data lines 21, and the touch switch tubes 25 are formed on the gate lines 20.
Specifically, the gate electrode of the thin film transistor 23 is a part of the gate line 20, that is, the gate electrode of the thin film transistor 23 is the gate line 20. The active layer pattern 231 of the thin film transistor 23 is positioned on the gate line 20, the source electrode 232 and the drain electrode 233 of the thin film transistor 23 are positioned on the active layer pattern 231 and are disposed at the same layer as the data line 21, the source electrode 232 of the thin film transistor 23 is connected to the data line 21, and the drain electrode 233 of the thin film transistor 23 is connected to the pixel electrode 24. A gate insulating layer (not shown) is formed on the gate line 20, the active layer pattern 231 is on the gate insulating layer, a passivation layer (not shown) is formed on the data line 21, the pixel electrode 24 is on the passivation layer, a via hole 234 is formed on the passivation layer above the drain electrode 233 of the thin film transistor 23, and the pixel electrode 24 is filled in the via hole 234 to be connected to the drain electrode 233.
The gate of the touch switch tube 25 is a part of the gate line 20, that is, the gate of the touch switch tube 25 is the gate line 20. The active layer pattern 251 of the touch switch tube 25 is positioned on the gate line 20, and the active layer pattern 251 is disposed at the same layer as the active layer pattern 231 of the thin film transistor 23. The source and the drain 252 of the touch switch tube 25 are located on the active layer pattern 251 and are disposed on the same layer as the data line 21, and the source of the touch switch tube 25 is a partial structure of the touch sensing line 26, that is, the source of the touch switch tube 25 is the touch sensing line 26. In this embodiment, the drain 252 of the touch switch tube 25 is a conductive pattern, that is, the drain 252 of the touch switch tube 25 and the conductive pattern are an integrated structure, which is used as both the drain 252 of the touch switch tube 25 and the conductive pattern, so that the drain 252 of the touch switch tube 25 is connected to the conductive pattern 12. A gate insulating layer (not shown) is formed on the gate line 20, the active layer pattern 251 is on the gate insulating layer, and a passivation layer (not shown) is formed on the data line 21 and the touch sensing line 26. The drain electrode 252 (i.e., the conductive pattern) is provided with a support projection region 28, and the support projection region 28 is a projection position of the support 14 on the second substrate on the conductive pattern.
Fig. 6 is a timing diagram of a gate signal of a touch screen in the second embodiment, as shown in fig. 5 and 6, a touch sensing line 26 is perpendicular to a gate line, when the gate signal output by the gate line is a high level signal, a touch switch is turned on under the control of the gate signal, a touch capacitor 16 is conducted with the touch sensing line 26 through the turned-on touch switch 25, the touch sensing line 26 outputs the sensing signal to a signal processor 27, and the signal processor 27 compares the sensing signal with a reference signal Vref, so as to determine whether a touch occurs and a position of the touch point when the touch occurs. When a touch occurs, the capacitance value of the touch capacitor 16 changes, the voltage difference between two ends of the touch capacitor 16 changes, and thus the output sensing signal changes, the touch sensing line 26 outputs the changed sensing signal to the signal processor 27, and the signal processor 27 compares the sensing signal with the reference signal Vref, so as to determine the touch occurrence and the touch point position.
Optionally, the first substrate may further include: virtual (dummy) lines and a virtual line switch tube 29, the touch sensing lines are connected with the virtual lines through the virtual line switch tube 29, and the virtual lines are grounded. Specifically, the gate of the virtual line switch tube 29 is connected to the gate line, the source of the virtual line switch tube 29 is connected to the touch sensing line, and the drain of the virtual line switch tube is connected to the virtual line, wherein the gate of the virtual line switch tube 29 is connected to the lowermost gate line. Because the voltage of the common electrode signal VCom is transmitted to the touch sensing lines through the touch capacitor and the touch switch tube, the voltage difference between two ends of the touch capacitor is zero due to the electric leakage over time, so that touch failure is caused, and therefore the touch sensing lines can release electric charges on each touch sensing line through the virtual lines when each frame of scanning is finished, so that the touch failure is effectively avoided.
In the touch screen provided by this embodiment, a touch capacitor is formed between the conductive pattern in the first substrate and the support in the second substrate, the common electrode provides a common electrode signal to the support forming one end of the touch capacitor, and the common electrode serves as a touch emission line to provide the common electrode signal to the touch capacitor, so that the touch emission line is prevented from being arranged on the touch screen, and the structure of the touch screen is simplified. The touch screen of the embodiment has strong anti-interference capability, so that the touch screen can be applied to a large-size touch screen. In this embodiment, the touch switch tube is formed on the gate line, and does not occupy the area inside the pixel sub-unit, thereby improving the aperture opening ratio of the pixel.
A third embodiment of the present invention provides a touch screen, where the touch screen is different from the touch screen in the first embodiment in that: the first substrate has a different structure. Fig. 7 is a schematic structural diagram of a first substrate according to a third embodiment of the present invention, and as shown in fig. 7, in this embodiment, the first substrate is an array substrate, and the first substrate includes: a gate line 20 and a data line 21 formed on a first substrate (not shown), the gate line 20 and the data line 21 defining a pixel sub-unit 22. The pixel sub-unit 22 includes a thin film transistor 23 and a pixel electrode 24, wherein the thin film transistor 23 is formed on the gate line 20. The touch sensing line 26 is disposed on the same layer as the gate line 20, the touch sensing line 26 is parallel to the data line 21, and the touch switch tube 25 is formed on the gate line 20 and the touch sensing line 26 adjacent to the gate line 20.
Specifically, the gate electrode of the thin film transistor 23 is a part of the gate line 20, that is, the gate electrode of the thin film transistor 23 is the gate line 20. The active layer pattern 231 of the thin film transistor 23 is positioned on the gate line 20, the source electrode 232 and the drain electrode 233 of the thin film transistor 23 are positioned on the active layer pattern 231 and are disposed at the same layer as the data line 21, the source electrode 232 of the thin film transistor 23 is connected to the data line 21, and the drain electrode 233 of the thin film transistor 23 is connected to the pixel electrode 24. A gate insulating layer (not shown) is formed on the gate line 20, the active layer pattern 231 is on the gate insulating layer, a passivation layer (not shown) is formed on the data line 21, the pixel electrode 24 is on the passivation layer, a via hole 234 is formed on the passivation layer above the drain electrode 233 of the thin film transistor 23, and the pixel electrode 24 is filled in the via hole 234 to be connected to the drain electrode 233.
The gate of the touch switch tube 25 is a part of the gate line 20, that is, the gate of the touch switch tube 25 is the gate line 20. The active layer pattern 251 of the touch switch tube 25 is positioned on the gate line 20, and the active layer pattern 251 is disposed at the same layer as the active layer pattern 231 of the thin film transistor 23. The source of the touch switch tube 25 is a part of the structure of the touch sensing line 26, that is, the source of the touch switch tube 25 is the touch sensing line 26. The source electrode of the touch switch tube 25 is connected to the active layer pattern 251 of the touch switch tube 25 through a connection pattern 30 disposed over the gate line 20 and the touch sensing line 26. The connection pattern 30 is provided in the same layer as the data line 21. The drain 252 of the touch switch tube 25 is located above the active layer pattern 251, in this embodiment, the drain 252 of the touch switch tube 25 is a conductive pattern, that is, the drain 252 of the touch switch tube 25 and the conductive pattern are an integrated structure, which is used as both the drain 252 of the touch switch tube 25 and the conductive pattern, so that the drain 252 of the touch switch tube 25 is connected to the conductive pattern 12. A gate insulating layer (not shown) is formed on the gate line 20 and the touch sensing line 26, the active layer pattern 251 is on the gate insulating layer, and a passivation layer (not shown) is formed on the data line 21 and the connection pattern 30. The drain electrode 252 (i.e., the conductive pattern) is provided with a support projection region 28, and the support projection region 28 is a projection position of the support 14 on the second substrate on the conductive pattern. A via hole 31 is formed on the gate insulating layer and the passivation layer above the touch sensing line 26, the connection pattern 30 is filled in the via hole 31 to be connected to the touch sensing line 26, and the other end of the connection pattern 30 is formed on the active layer pattern 251, so that the active layer pattern 251 is connected to the source electrode of the touch switch tube 25 (i.e., the touch sensing line 26) through the connection pattern 30.
Fig. 8 is a timing diagram of gate signals of a touch screen in the third embodiment, as shown in fig. 7 and 8, the touch sensing lines 26 are parallel to the gate lines, and a line resistance capacitance load (RC) is formed between the touch point and the signal processor 27. When the grid signal output by the grid line is a high-level signal, the touch switch tube is turned on under the control of the grid signal, the touch capacitor 16 is conducted with the touch sensing line 26 through the turned-on touch switch tube 25, the touch sensing line 26 outputs the sensing signal to the signal processor 27, and the signal processor 27 compares the sensing signal with the reference signal Vref, so as to determine whether a touch occurs and the position of the touch point when the touch occurs. When a touch occurs, the capacitance value of the touch capacitor 16 changes, the voltage difference between two ends of the touch capacitor 16 changes, and thus the output sensing signal changes, the touch sensing line 26 outputs the changed sensing signal to the signal processor 27, and the signal processor 27 compares the sensing signal with the reference signal Vref, so as to determine the touch occurrence and the touch point position.
Optionally, the first substrate may further include: the touch control induction line is connected with the virtual line through the virtual line switch tube, and the virtual line is grounded. In this embodiment, the description of the virtual line and the virtual switch tube may refer to the description in the second embodiment, and will not be repeated here.
In the touch screen provided by this embodiment, a touch capacitor is formed between the conductive pattern in the first substrate and the support in the second substrate, the common electrode provides a common electrode signal to the support forming one end of the touch capacitor, and the common electrode serves as a touch emission line to provide the common electrode signal to the touch capacitor, so that the touch emission line is prevented from being arranged on the touch screen, and the structure of the touch screen is simplified. The touch screen of the embodiment has strong anti-interference capability, so that the touch screen can be applied to a large-size touch screen. In this embodiment, the touch switch tube is formed on the gate line and the touch sensing line, and does not occupy the area inside the pixel sub-unit, thereby improving the pixel aperture ratio.
Fig. 9 is a schematic structural diagram of a touch screen according to a fourth embodiment of the present invention, and as shown in fig. 9, the touch screen according to the present embodiment is different from the touch screen according to the first embodiment in that: the support 14 is a non-conductive spacer, and the common electrode 15 is formed on the support 14. Specifically, the support 14 is formed on the planarization layer 45, and the common electrode 15 covers the support 14. In this embodiment, the support 14, the common electrode 15 on the support 14, and the conductive pattern 12 form a touch capacitor 16. At this time, the supporter (non-conductive spacer) 14 and the common electrode 15 on the supporter 14 form a structure having a function of a conductive spacer, and it can be considered that the supporter (non-conductive spacer) 14 and the common electrode 15 on the supporter 14 form a supporter having a conductive function, which is the common electrode 15 on the supporter 14.
For the rest of the description of the second substrate, reference may be made to the first embodiment, and details are not repeated here. In addition, the first substrate in the touch screen provided in this embodiment may also adopt the second substrate in embodiment two or embodiment three, which is not described in detail here.
In the touch screen provided by this embodiment, a touch capacitor is formed between the conductive pattern in the first substrate and the support in the second substrate, the common electrode provides a common electrode signal to the support forming one end of the touch capacitor, and the common electrode serves as a touch emission line to provide the common electrode signal to the touch capacitor, so that the touch emission line is prevented from being arranged on the touch screen, and the structure of the touch screen is simplified. The touch screen of the embodiment has strong anti-interference capability, so that the touch screen can be applied to a large-size touch screen.
An embodiment of the present invention provides a display device, including: a touch screen. The touch screen may be the touch screen described in any of the first to fourth embodiments, and details are not repeated here.
In the display device provided by this embodiment, a touch capacitor is formed between the conductive pattern in the first substrate and the support in the second substrate, the common electrode provides a common electrode signal to the support forming one end of the touch capacitor, and the common electrode serves as a touch emission line to provide the common electrode signal to the touch capacitor, so that the touch emission line is prevented from being arranged on the touch screen, and the structure of the touch screen is simplified. The touch screen of the embodiment has strong anti-interference capability, so that the touch screen can be applied to a large-size touch screen.
An embodiment of the present invention provides a driving method of a touch screen, where the touch screen includes: the touch control circuit board comprises a first substrate and a second substrate which are oppositely arranged, wherein the first substrate comprises a first substrate base plate, a conductive pattern, a touch control switch tube and a touch control induction line are formed on the first substrate base plate, the conductive pattern is connected with the touch control induction line through the touch control switch tube, the second substrate comprises a second substrate base plate, a support and a common electrode connected with the support are formed on the second substrate base plate, the support and the conductive pattern are oppositely arranged, and a touch control capacitor is formed between the support and the conductive pattern.
The method comprises the following steps:
the common electrode provides a common electrode signal to the support;
the conductive pattern outputs a sensing signal to the touch sensing line through the touch switch tube.
The driving method of the touch screen provided in this embodiment can be used to drive the touch screen described in any of the first to fourth embodiments.
In the driving method of the touch screen provided by this embodiment, a touch capacitor is formed between the conductive pattern in the first substrate and the support in the second substrate, a common electrode provides a common electrode signal to the support forming one end of the touch capacitor, and the common electrode serves as a touch emission line to provide the common electrode signal to the touch capacitor, so that the touch emission line is prevented from being arranged on the touch screen, and the structure of the touch screen is simplified. The touch screen of the embodiment has strong anti-interference capability, so that the touch screen can be applied to a large-size touch screen.
It will be understood that the above embodiments are merely exemplary embodiments taken to illustrate the principles of the present invention, which is not limited thereto. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit and substance of the invention, and these modifications and improvements are also considered to be within the scope of the invention.
Claims (10)
1. A touch screen, comprising: the first substrate and the second substrate are oppositely arranged;
the first substrate comprises a first substrate base plate, a conductive pattern, a touch switch tube and a touch induction line for receiving a sensing signal output by the conductive pattern through the touch switch tube are formed on the first substrate base plate, and the conductive pattern is connected with the touch induction line through the touch switch tube;
the second substrate comprises a second substrate base plate, a support and a common electrode which is connected with the support and provides a common electrode signal for the support are formed on the second substrate base plate, the support and the conductive pattern are oppositely arranged, and a touch capacitor is formed between the support and the conductive pattern.
2. The touch panel of claim 1, wherein the first substrate is an array substrate, the first substrate comprising: the pixel structure comprises a grid line and a data line which are formed on a first substrate, wherein the grid line and the data line define a pixel subunit;
the grid electrode of the touch switch tube is electrically connected with the grid line, the source electrode of the touch switch tube is electrically connected with the touch sensing line, and the drain electrode of the touch switch tube is electrically connected with the conductive pattern.
3. The touch screen of claim 1, wherein the touch sensing lines and the data lines are disposed on the same layer, and the touch switch tubes are formed on the gate lines.
4. The touch screen of claim 1, wherein the touch sensing lines are disposed on the same layer as the gate lines, and the touch switching tubes are formed on the gate lines and the touch sensing lines adjacent to the gate lines.
5. The touch screen of claim 4, wherein the gate of the touch switch tube is a partial structure of the gate line, the source of the touch switch tube is a partial structure of the touch sense line, the active layer pattern of the touch switch tube is located on the gate line, and the source is connected to the active layer pattern through a connection pattern straddling over the gate line and the touch sense line.
6. The touch screen of claim 2, wherein the first substrate further comprises: the touch control induction line is connected with the virtual line through the virtual line switch tube, and the virtual line is grounded.
7. The touch screen of claim 1, wherein the second substrate is a color film substrate, and the second substrate comprises: and the common electrode is positioned on the black matrix pattern and the color matrix pattern.
8. The touch screen of claim 7, wherein the support is a conductive spacer, and the support is formed on the common electrode; or,
the support is a non-conductive spacer, and the common electrode is formed on the support.
9. A display device, comprising: the touch screen of any of the above claims 1-8.
10. A driving method of a touch screen is characterized in that the touch screen comprises the following steps: the touch control circuit comprises a first substrate and a second substrate which are oppositely arranged, wherein the first substrate comprises a first substrate, a conductive pattern, a touch control switch tube and a touch control induction line are formed on the first substrate, the conductive pattern is connected with the touch control induction line through the touch control switch tube, the second substrate comprises a second substrate, a support and a common electrode connected with the support are formed on the second substrate, the support and the conductive pattern are oppositely arranged, and a touch control capacitor is formed between the support and the conductive pattern;
the method comprises the following steps:
the common electrode provides a common electrode signal to the support;
the conductive pattern outputs a sensing signal to the touch sensing line through the touch switch tube.
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