TW201518807A - Touch display and method for driving a plurality of touch driving electrodes of touch display - Google Patents

Abstract

A touch display provided by the present invention includes a control unit and a display. The control unit outputs driving signals to a plurality of touch driving electrodes and receives sensing signals from a plurality of touch sensing electrodes so as to detect touch or proximity of at least one external object based on the capacitive coupling between the driving and sensing electrodes. The display includes a liquid crystal layer, a pixel electrode and a common electrode, wherein the liquid crystal layer is driven by the pixel electrode and the common electrode. The common electrode includes the touch driving electrodes, and the common electrode except the touch driving electrodes are electrically coupled to a DC potential to form a shielded region.

Description

Touch display device and driving method of multiple touch driving electrodes thereof

The present invention relates to a touch device, and more particularly to a method for driving a plurality of touch drive electrodes in a touch display device and a touch display device in which the touch device assembly is integrated into the display device.

Many touch screens can be formed by covering a capacitive touch panel on a liquid crystal display (LCD). The touch screen outputs a driving signal to a plurality of touch driving electrodes, and receives sensing signals from a plurality of touch sensing electrodes. When at least one external object touches or approaches the intersection of the touch driving electrode and the touch sensing electrode, the capacitance between the touch driving electrode and the touch sensing electrode will change. The touch screen can be used to determine the position at which the touch occurs based on this capacitance change.

Although covering the liquid crystal display with the capacitive touch panel can still allow light from the liquid crystal display to pass, the capacitive touch panel still causes the brightness of the liquid crystal display to decrease. In addition, the capacitive touch panel covers the liquid crystal display to increase the thickness and weight. However, the integration of the touch screen component into the liquid crystal display can avoid the above problem, but the electromagnetic interference (EMI; ElectroMagnetic Interference) generated when the liquid crystal display is updated on the screen affects the touch drive electrode and the touch sensing electrode. The amount of mutual capacitance coupling.

According to an embodiment of the present invention, a touch device includes: a plurality of touch driving electrodes disposed in a common electrode of a liquid crystal layer, wherein the common electrode is coupled to the plurality of touch driving electrodes a constant current potential to form a shielding region; a plurality of touch sensing electrodes; and a control unit for detecting capacitive coupling between the plurality of touch driving electrodes and the plurality of touch sensing electrodes to perform The operation of at least one external object.

According to another embodiment of the present invention, a display device includes: a pixel electrode; a common electrode including a plurality of touch driving electrodes of a touch device, wherein the common electrode other than the plurality of touch driving electrodes And coupled to the DC current to form a shielding region; and a liquid crystal layer between the pixel electrode and the common electrode to be driven by the pixel electrode and the common electrode.

According to another embodiment of the present invention, a touch display device includes: a control unit that receives a sensing signal to a plurality of touch driving electrodes and receives sensing signals from a plurality of touch sensing electrodes to And detecting, by the capacitive coupling between the plurality of touch driving electrodes and the plurality of touch sensing electrodes, a touch of at least one external object; and a display device comprising a liquid crystal layer and driving the pixel electrode of the liquid crystal layer And a common electrode, wherein the common electrode includes the plurality of touch driving electrodes, and the common electrode other than the plurality of touch driving electrodes is coupled to a DC current to form a shielding region.

According to another embodiment of the present invention, a common electrode is disposed in a display device, and the common electrode is coupled to a pixel electrode to drive a liquid crystal layer, wherein the common electrode comprises: a plurality of touch driving electrodes, wherein The common electrode other than the plurality of touch driving electrodes is coupled to a DC current to form a shielding region, wherein the plurality of touch drivers The electrode is provided with a driving signal, and the sensing signal is received from the plurality of touch sensing electrodes to detect the contact of at least one external object according to the capacitive coupling between the plurality of touch driving electrodes and the plurality of touch driving electrodes bump.

According to still another embodiment of the present invention, a plurality of touch controls in a touch device are provided. The driving method of the driving electrode, wherein the plurality of touch driving electrodes are disposed in a display device, the driving method includes: when the display device updates a horizontal pixel line, the touch device continuously provides a driving signal At least one touch drive electrode is provided for mutual capacitance detection.

100‧‧‧Touch display device

120‧‧‧Control unit

130‧‧‧Touch sensing unit

132‧‧‧Touch drive electrode

132-1~132-y‧‧‧Touch drive electrode

134‧‧‧Touch sensing electrode

134-1~134-3‧‧‧Touch sensing electrode

140‧‧‧Display pixel unit

142‧‧‧Liquid layer

144‧‧‧pixel electrode

146‧‧‧Common electrode

148‧‧‧thin film layer

150‧‧‧Lighting layer

152‧‧‧Color filters

160‧‧‧First substrate

162‧‧‧second substrate

170‧‧‧First Polarization Layer

172‧‧‧Second polarizing layer

180‧‧‧Backlight module

200‧‧‧Selection circuit

500~530‧‧‧Steps

Driving direction of D1‧‧‧ touch drive electrodes

D2‧‧‧Update scan direction of thin film transistor layer

DG1~DGn‧‧‧Touch drive electrode group

DG1~DGk‧‧‧Touch drive electrode group

DG1~DGj‧‧‧Touch drive electrode group

EX1~EXz‧‧‧Extension

PL‧‧‧ horizontal pixel line

SE1~SEm‧‧‧Subelectrode

SG1~SGn‧‧‧ subelectrode group

Vcom‧‧‧DC potential

The first A, the first B, the first C, the first D, the first E, and the first F are schematic structural diagrams of a touch display device 100 according to an embodiment of the present invention.

The second A, the second B, the second C, and the second D are schematic structural views of the common electrode 146 and the plurality of touch driving electrodes 132 according to the embodiment of the present invention.

The third figure is a partial perspective view of a plurality of touch driving electrodes and a plurality of touch sensing electrodes according to an embodiment of the invention.

The fourth figure is a partial perspective view of the scanning scan of the thin film transistor layer and the driving direction of the plurality of touch driving electrodes according to an embodiment of the invention.

FIG. 5 is a block flow diagram of a touch driving electrode driving method according to an embodiment of the invention.

The invention will be described in detail below with some embodiments. However, the invention may be applied to other embodiments in addition to the disclosed embodiments. The scope of the invention It is not limited by the embodiments, which are subject to the scope of the subsequent patent application. And to provide clearer The description and the subject matter of the present invention can be understood by those skilled in the art, and the parts in the drawings are not drawn according to their relative sizes, and the ratio of some dimensions to other related scales is highlighted and exaggerated, and The relevant details are also not fully drawn for the sake of simplicity.

Please refer to FIG. 1A to FIG. 1F, which are schematic structural diagrams of a touch display device 100 according to an embodiment of the present invention. The touch display device 100 includes a control unit 120, a touch sensing unit 130, and a display pixel unit 140.

The touch sensing unit 130 includes a plurality of touch driving electrodes 132 and a plurality of touch sensing electrodes 134 . The control unit 120 outputs the driving signal to the plurality of touch driving electrodes 132, and receives the sensing signals from the plurality of touch sensing electrodes 134, according to the plurality of touch driving electrodes 132 and the plurality of touch sensing electrodes 134. The mutual capacitive coupling detects the touch of at least one external object.

The display pixel unit 140 includes a liquid crystal layer 142, a pixel electrode 144 and a common electrode 146. The liquid crystal layer 142 is located between the pixel electrode 144 and the common electrode 146 to be driven by the pixel electrode 144 and the common electrode 146. A plurality of touch driving electrodes 132 are disposed in the common electrode 146. The common electrode 146 other than the plurality of touch driving electrodes 132 is coupled to the DC current to form a shielding region.

The touch display device 100 further includes a thin film transistor (TFT) layer 148 in which the pixel electrode 144 is disposed in the thin film transistor layer 148. When the thin film transistor layer 148 performs an update scan, electromagnetic interference (EMI) is generated for the plurality of touch driving electrodes 134 to affect the mutual capacitive coupling detection. Therefore, the common electrode 146 is disposed between the thin film transistor layer 148 and the plurality of touch sensing electrodes 134 to reduce the electromagnetic interference generated when the thin film transistor layer 148 is subjected to the update scanning by the shielding region of the common electrode 146.

The touch display device 100 further includes a black matrix 150, a first substrate 160 and a first polarizing layer 170. The common electrode 146 is located between the liquid crystal layer 142 and the light shielding layer 150. The light shielding layer 150 is located between the common electrode 146 and the first substrate 160. The first substrate 160 is located between the light shielding layer 150 and the first polarizing layer 170. Furthermore, the light shielding layer 150 includes a color filter 152.

The plurality of touch sensing electrodes 134 can be disposed in each of the plurality of touch driving electrodes 132 or between the layers of the plurality of touch driving electrodes 132. In one embodiment, the plurality of touch sensing electrodes 134 can be disposed between the first substrate 160 and the first polarizing layer 170, as shown in FIG. In another embodiment, the plurality of touch sensing electrodes 134 can be disposed between the light shielding layer 150 and the first substrate 160, as shown in FIG. In a further embodiment, the plurality of touch sensing electrodes 134 can be disposed between the light shielding layer 150 and the plurality of touch driving electrodes 132, as shown in FIG. In another embodiment, the plurality of touch sensing electrodes 134 can be disposed in the light shielding layer 150 as shown in the first D. In a further embodiment, the plurality of touch sensing electrodes 134 can be disposed in the first substrate 160 as shown in FIG. In a further embodiment, the plurality of touch sensing electrodes 134 can be disposed in the first polarizing layer 170 as shown in the first F.

Furthermore, the touch display device 100 further includes a second substrate 162 , a second polarizing layer 172 and a backlight module 180 . The pixel electrode 144 is located between the backlight module 180 and the common electrode 146 , and the second substrate 162 and the second polarizing layer 172 are located between the pixel electrode 144 and the backlight module 180 .

In one embodiment, the first substrate 160 and the second substrate 162 are both formed of a transparent material, wherein the second substrate is a TFT glass.

The common electrode 146 may include a plurality of sub-electrodes in which a plurality of sub-electrodes are arranged in parallel with each other. The plurality of sub-electrodes can be divided into a plurality of groups, and each of the sub-electrodes is coupled to a direct current potential. A plurality of touch drive electrodes can also be divided into a plurality of groups, and each The group of touch driving electrodes may include one or more touch driving electrodes 132. Each of the group of touch driving electrodes is coupled to a selection circuit 200 for switching the driving of each group of touch driving electrodes by the selecting circuit 200. One or more groups of touch driving electrodes may be disposed in each group of sub-electrodes of the common electrode 146, or a group of touch driving electrodes may be disposed in the adjacent two groups of sub-electrodes.

Referring to FIG. 2A, FIG. 2B, FIG. 2C and FIG. 2D, FIG. 2 is a schematic structural diagram of a common electrode 146 and a plurality of touch driving electrodes 132 according to an embodiment of the present invention. The plurality of touch driving electrodes 132 of the one or more groups of touch driving electrodes may be disposed continuously or discretely in each of the group of sub-electrodes of the common electrode 146.

Referring to FIG. 2A, the plurality of sub-electrodes of the common electrode 146 include a first group of sub-electrodes SG1, a second group of sub-electrodes SG2, ..., an n-th sub-electrode SGn. Each of the sub-electrodes comprises a plurality of sub-electrodes, wherein the plurality of sub-electrodes comprise a first sub-electrode SE1, a second sub-electrode SE2, ... a m-th sub-electrode SEm. The plurality of touch driving electrodes include a first group of touch driving electrodes DG1, a second group of touch driving electrodes DG2, ... an nth group of touch driving electrodes DGn, and each group of touch driving electrodes includes three touches The drive electrodes 132-1, 132-2, 132-3 are controlled. The first group of touch driving electrodes DG1 are disposed in the first group of sub-electrodes SG1, and the second group of touch driving electrodes DG2 are disposed in the second group of sub-electrodes SG2. n group of sub-electrodes SGn. Among the plurality of sub-electrodes SG1, SG2, ... SGn of the common electrode 146, three touch driving electrodes 132-1, 132-2, and 132-3 are continuously arranged.

Referring to FIG. 2B, each group of touch driving electrodes DG1, DG2, . . . DGn is still disposed in each group of sub-electrodes SG1, SG2, ..., SGn. However, among each of the group of touch driving electrodes DG1, DG2, ... DGn, the three touch driving electrodes 132 are discretely arranged. For example, in the nth group of touch driving electrodes DGn, two adjacent touch driving electrodes of the three touch driving electrodes A second sub-electrode SE2 of the nth sub-electrode SGn is disposed between 132-1 and 132-2, and the other two adjacent touch driving electrodes 132-2 and 132-3 of the three touch driving electrodes 132 are disposed between A third sub-electrode SE3 of the n-group sub-electrode SGn.

Referring to FIG. 2C, each group of sub-electrodes SG1, SG2, ... SGn is configured with two groups of touch driving electrodes, and the plurality of touch driving electrodes can be divided into k groups of touch driving electrodes DG1, DG2... DGk, where k = 2n. Each group of touch driving electrodes DG1, DG2, ... DGk includes two touch driving electrodes 132-1, 132-2. In each of the group of touch driving electrodes DG1, DG2, ... DGk, the two touch driving electrodes 132 are discretely arranged. For example, in the k-1th group touch driving electrode DGk-1, a second sub-electrode SE2 and a first sub-electrode SGn are disposed between two adjacent touch driving electrodes 132-1 and 132-2. The third sub-electrode SE3, and in the kth group of touch driving electrodes DGk, an m-2th sub-electrode SEm- of the nth sub-electrode SGn is disposed between two adjacent touch driving electrodes 132-1 and 132-2. 2 and an m-1th sub-electrode SEm-1.

Referring to FIG. 2D, a plurality of touch driving electrodes can be divided into j group touch driving electrodes DG1, DG2, ... DGj. The two touch driving electrodes 132-1 and 132-2 of each group of the touch driving electrodes DG1, DG2, ... DGj may be disposed in the same group of sub-electrodes, or may be disposed in the adjacent two sub-electrodes. For example, the two touch driving electrodes 132-1 and 132-2 of the first group of touch driving electrodes DG1 are disposed in the first group of sub-electrodes SG1, and the two touch driving electrodes 132 of the first group of touch driving electrodes DG1 are 1. The first sub-electrode SEi and the (i+1)th sub-electrode SEi+1 of the first group sub-electrode SG1 are disposed between the first and second sub-electrodes SG1. The two touch driving electrodes 132-1 and 132-2 of the second group of touch driving electrodes DG2 are respectively disposed in the first group sub-electrode SG1 and the second group sub-electrode SG2, wherein the second group of touch driving electrodes DG2 The mth sub-electrode SEm of the first group sub-electrode SG1 and the first sub-electrode SE1 of the second group sub-electrode SG2 are disposed between the two touch driving electrodes 132-1 and 132-2.

In the common electrode 146, the area of each of the sub-electrodes SG1, SG2, ... SGn coupled to the DC potential Vcom is larger than the area of the plurality of touch driving electrodes 132, that is, the area of the shielding area is larger than the plurality of touch driving electrodes. The area of 132 is such as to reduce electromagnetic interference from the thin film transistor layer 148 by the shield region.

Referring to the third figure, it is a partial perspective view of a plurality of touch driving electrodes and a plurality of touch sensing electrodes according to an embodiment of the invention. The plurality of touch driving electrodes 132 and the plurality of touch sensing electrodes 134 cross each other. Each of the touch sensing electrodes 134 includes a plurality of extensions, and each of the extensions is parallel to the plurality of touch driving electrodes 134 to increase mutual interaction between the touch sensing electrodes 134 and the plurality of touch driving electrodes 132. The amount of capacitive coupling. For example, a first touch sensing electrode 134-1 includes a first extension portion EX1, a second extension portion EX2, a third extension portion EX3, a fourth extension portion EX4, and a z-1 The extension portion EXz-1 and a z-th extension portion EXz, wherein z=2y. The first extension portion EX1 is adjacent to the second extension portion EX2 and parallel to the first touch driving electrode 132-1 to increase the first touch sensing electrode 134-1 and the first touch driving electrode 132-1. The amount of mutual capacitance coupling between them. Furthermore, the third extension portion EX3 is adjacent to the fourth extension portion EX4 and parallel to the second touch driving electrode 132-2 to increase the first touch sensing electrode 134-1 and the second touch driving electrode. The amount of mutual capacitance coupling between 132-2. Similarly, the z-1th extension EXz-1 is adjacent to the zth extension EXz and parallel to the yth touch driving electrode 132-y to increase the first touch sensing electrodes 134-1 and y The amount of mutual capacitance coupling between the touch driving electrodes 132-y.

Since the thin film transistor layer 148 updates the horizontal pixel line one by one to update the display device screen, when the driven at least one touch driving electrode overlaps or approaches the level being updated in the thin film transistor layer 148 In the case of the pixel line, the driving signal of the at least one touch driving electrode that is driven will interfere with the horizontal pixel line being updated. In general, touch The device drives the plurality of touch drive electrodes 132 when the display device does not update the scan horizontal pixel lines to prevent the drive signals from interfering with the update scan of the horizontal pixel lines. However, the present invention further provides a driving method for a plurality of touch driving electrodes 132 in the touch device, which can simultaneously update the scanning horizontal pixel lines and drive the plurality of touch driving electrodes 132. First, the driving direction of the plurality of touch driving electrodes is designed to be opposite to the updated scanning direction of the thin film transistor layer 148. When the at least one touch driving electrode to be driven affects the horizontal pixel line of the thin film transistor layer 148 to be scanned, the at least one touch driving electrode is paused, and the horizontal pixel line of the thin film transistor layer 148 is scanned to leave the touch. Drive the control range of the drive electrode.

Please refer to the fourth figure, which is a partial perspective view of the scanning scan of the thin film transistor layer and the driving direction of the plurality of touch driving electrodes according to an embodiment of the invention. The driving direction D1 of the plurality of touch driving electrodes is opposite to the updating scanning direction D2 of the thin film transistor layer 148. When the three touch driving electrodes 132-1, 132-2, 132-3 of the driven ith group touch driving electrode DGi overlap or are adjacent to the horizontal pixel line PL being updated in the thin film transistor layer 148, the selection circuit 200 The ith group touch driving electrode DGi that is originally driven is suspended, and the horizontal pixel line scanned by the thin film transistor layer 148 is driven away from the influence range of the ith group touch driving electrode DGi. The plurality of touch drive electrodes 132 are all horizontally aligned parallel to the horizontal pixel lines of the thin film transistor layer 148 and parallel to the plurality of sub-electrodes.

Accordingly, the present invention further provides a driving method for a plurality of touch driving electrodes 132 in a touch display device. Please refer to FIG. 5 , which is a block diagram of a method for driving a touch driving electrode according to an embodiment of the invention. . First, as shown in step 500, when the touch display device updates the scanning horizontal pixel line, the touch display device continuously supplies the driving signal to the at least one touch driving electrode for mutual capacitance detection. Subsequently, as shown in step 510, determining the horizontal image in the update scan Whether the prime line PL is within an influence range of the at least one touch driving electrode that is driven. Then, as shown in step 520, when the horizontal pixel line PL in the update scan is outside the influence range, the at least one touch drive electrode is continuously driven, and step 510 is continuously performed. Then, as shown in step 530, when the horizontal pixel line PL in the update scan enters the influencing range, the driving of the at least one touch driving electrode is suspended, and step 510 is continuously performed. Then, after the horizontal pixel line PL is continuously updated and scanned to the exiting influence range, step 520 is executed to drive the at least one touch driving electrode.

In accordance with the above, the present invention provides a touch device as shown in the first A through the first F. The touch device includes a plurality of touch driving electrodes 132 , a plurality of touch sensing electrodes 134 , and a control unit 120 . The plurality of touch driving electrodes 132 are disposed in a common electrode 146 of the liquid crystal layer 142. The common electrode 146 other than the plurality of touch driving electrodes 132 is coupled to the DC potential Vcom to form a shielding region. The shielding region is disposed between the thin film transistor layer 148 and the plurality of touch sensing electrodes 134, thereby reducing electromagnetic interference generated when the thin film transistor layer 148 is subjected to an update scan. The control unit 120 detects capacitive coupling between the plurality of touch driving electrodes 132 and the plurality of touch sensing electrodes 134 to perform operation of at least one external object.

The present invention further provides a display device as shown in the first A through the first F. The display device includes a pixel electrode 144, a common electrode 146 and a liquid crystal layer 142. The common electrode 146 is coupled to the plurality of touch driving electrodes 132 of the touch device, and the common electrode 146 other than the plurality of touch driving electrodes 132 is coupled to the DC potential Vcom to form a shielding region. The liquid crystal layer 142 is located between the pixel electrode 144 and the common electrode 146 to drive the liquid crystal layer 142 by the pixel electrode 144 and the common electrode 146.

The present invention further provides a touch display device, as shown in the first A through the first F. The touch display device includes a control unit 120 and the aforementioned display device. Control unit 120 by means of loss The driving signal is sent to the plurality of touch driving electrodes 132, and the sensing signals are received from the plurality of touch sensing electrodes 134 for capacitive coupling between the plurality of touch driving electrodes 132 and the plurality of touch sensing electrodes 134. Detecting at least one external object touch. The display device includes a liquid crystal layer 142 and a pixel electrode 144 and a common electrode 146 for driving the liquid crystal layer 142. The common electrode 146 includes a plurality of touch driving electrodes 132, and the common electrode 146 other than the plurality of touch driving electrodes 132 is coupled to the The DC potential is Vcom to form a shielded area.

The present invention further provides a common electrode 146 as shown in the first A through the first F. The common electrode 146 is disposed in the display device, and the common electrode 146 is coupled to the pixel electrode 144 to drive the liquid crystal layer 142. The common electrode 146 includes a plurality of touch driving electrodes 132, and the common electrode 146 other than the plurality of touch driving electrodes 142 is coupled to the DC potential Vcom to form a shielding region. Furthermore, the plurality of touch driving electrodes 132 are provided with driving signals, and the sensing signals are received from the plurality of touch sensing electrodes 134 to be based on the capacitance between the plurality of touch driving electrodes 132 and the plurality of touch driving electrodes 134. The sexual coupling detects the touch of at least one external object.

The remaining relevant details have been disclosed in the above description and will not be described again here.

The above description is only the preferred embodiment of the present invention, and is not intended to limit the scope of the claims of the present invention; any equivalent changes or modifications which are made in the spirit of the present invention should be included in the following. The scope of the patent application.

100‧‧‧Touch display device

120‧‧‧Control unit

130‧‧‧Touch sensing unit

132‧‧‧Touch drive electrode

132-1~132-3‧‧‧Touch drive electrode

134‧‧‧Touch sensing electrode

134-1~134-3‧‧‧Touch sensing electrode

140‧‧‧Display pixel unit

142‧‧‧Liquid layer

144‧‧‧pixel electrode

146‧‧‧Common electrode

148‧‧‧thin film layer

150‧‧‧Lighting layer

152‧‧‧Color filters

160‧‧‧First substrate

162‧‧‧second substrate

170‧‧‧First Polarization Layer

172‧‧‧Second polarizing layer

180‧‧‧Backlight module

200‧‧‧Selection circuit

Vcom‧‧‧DC potential

Claims (24)

A display device includes: a pixel electrode; a common electrode comprising a plurality of touch driving electrodes of a touch device, wherein the common electrode other than the plurality of touch driving electrodes is coupled to a DC potential to form a a shielding region; and a liquid crystal layer between the pixel electrode and the common electrode to be driven by the pixel electrode and the common electrode. The display device of claim 1, wherein the shielding area has an area larger than an area of the plurality of touch driving electrodes. The display device according to claim 1, wherein the pixel electrode is located in a thin film transistor (TFT) layer, and the plurality of touch driving electrodes are horizontally arranged and updated parallel to the level of the thin film transistor layer. a horizontal pixel line, wherein a driving direction of the plurality of touch driving electrodes is opposite to an updated scanning direction of the thin film transistor layer, and at least one touch driving electrode that is driven will affect the updating of the thin film transistor layer When the horizontal pixel line is suspended, the at least one touch driving electrode is paused, and the horizontal pixel line of the thin film transistor layer is scanned to be driven away from the influence range of the at least one touch driving electrode. The display device of claim 1, further comprising a thin film transistor (TFT) layer, wherein the shielding region is located between the thin film transistor layer and the plurality of touch sensing electrodes to reduce the thin film transistor layer Electromagnetic interference generated during an update scan (EMI; ElectroMagnetic The plurality of touch driving electrodes are provided with a driving signal, and the sensing signals are received from the plurality of touch sensing electrodes according to the capacitance between the plurality of touch driving electrodes and the plurality of touch driving electrodes The sexual coupling detects the touch of at least one external object. The display device of claim 1, wherein the common electrode comprises a plurality of sub-electrodes, and the plurality of sub-electrodes are arranged in parallel with each other, wherein the plurality of touch-driving electrodes are disposed continuously or discretely in the plurality of sub-electrodes, And parallel to the plurality of strip electrodes. The display device of claim 1, further comprising a plurality of sensing electrodes of the touch device, wherein each of the touch sensing electrodes comprises a plurality of extensions, and each of the extensions is parallel to the plurality of touch drivers An electrode is configured to increase a mutual capacitance coupling between the touch sensing electrode and the plurality of touch driving electrodes. The display device of claim 1, further comprising a first polarizing layer, a light shielding layer and a first substrate on the plurality of driving electrodes, wherein the plurality of touch sensing electrodes are located at the plurality of driving electrodes Among the layers above, or between the layers. A touch device includes: a plurality of touch driving electrodes disposed in a common electrode for driving a liquid crystal layer, wherein the common electrode other than the plurality of touch driving electrodes is coupled to a DC potential to form a shield a region; a plurality of touch sensing electrodes; A control unit detects capacitive coupling between the plurality of touch driving electrodes and the plurality of touch sensing electrodes to perform operation of at least one external object. The touch device of claim 8, wherein the area of the shielding area is larger than the area of the plurality of touch driving electrodes. The touch device of claim 8 , wherein each of the touch sensing electrodes includes a plurality of extending portions, wherein each of the extending portions is parallel to the plurality of touch driving electrodes to increase the touch sensing electrodes and the The amount of mutual capacitance coupling between a plurality of touch drive electrodes. The touch device of claim 8, wherein the plurality of touch driving electrodes are horizontally arranged and updated parallel to a thin film transistor (TFT) layer to scan a horizontal pixel line, and the plurality The driving direction of the strip touch driving electrode is opposite to the updating scanning direction of the thin film transistor layer, and when at least one touch driving driving electrode to be driven affects the horizontal pixel line of the thin film transistor layer to scan, the at least one is suspended. The touch driving electrode is driven after the horizontal pixel line of the thin film transistor layer is scanned and moved away from the influence range of the touch driving electrode, wherein the thin film transistor includes a pixel electrode, and the pixel electrode and the common electrode drive the Liquid crystal layer. The touch device of claim 8, wherein the shielding region is located between a thin film transistor (TFT) layer and the plurality of touch sensing electrodes to reduce the occurrence of an update scan of the thin film transistor layer. Electromagnetic interference (EMI; ElectroMagnetic Interference). The touch device of claim 8, wherein the common electrode comprises a plurality of sub-electrodes, and the plurality of sub-electrodes are arranged in parallel with each other, wherein the plurality of touch driving electrodes are continuously or discretely disposed in the plurality of sub-electrodes And parallel to the plurality of strip electrodes. A touch display device includes: a control unit that receives a driving signal to a plurality of touch driving electrodes, and receives sensing signals from a plurality of touch sensing electrodes, according to the plurality of touch driving electrodes and the Capacitive coupling between the plurality of touch sensing electrodes detects contact of at least one external object; and a display device comprising a liquid crystal layer and driving a pixel electrode and a common electrode of the liquid crystal layer, wherein the common electrode comprises The plurality of touch driving electrodes, and the common electrode other than the plurality of touch driving electrodes are coupled to a DC current to form a shielding region. The touch display device of claim 14, wherein the area of the shielding area is larger than the area of the plurality of touch driving electrodes. The touch display device of claim 14, wherein the pixel electrode is located in a thin film transistor (TFT) layer, and the plurality of touch driving electrodes are horizontally aligned and updated parallel to the thin film transistor layer. a horizontal pixel line, wherein a driving direction of the plurality of touch driving electrodes is opposite to an updated scanning direction of the thin film transistor layer, and at least one touch driving electrode to be driven affects the thin film transistor layer Update scanned horizontal pixel lines At the same time, the at least one touch driving electrode is paused, and the horizontal pixel line of the thin film transistor layer after the scanning is removed from the influence range of the touch driving electrode is driven. The touch display device of claim 14, wherein the display device further comprises a thin film transistor (TFT) layer, and the shielding region is located between the thin film transistor layer and the plurality of touch sensing electrodes, The electromagnetic interference (EMI; ElectroMagnetic Interference) generated when the thin film transistor layer is subjected to an update scan is lowered. The touch display device of claim 14, wherein the common electrode comprises a plurality of sub-electrodes, and the plurality of sub-electrodes are arranged in parallel with each other, wherein the plurality of touch driving electrodes are continuously or discretely disposed on the plurality of sub-electrodes Medium and parallel to the plurality of strip sub-electrodes. The touch display device of claim 14, wherein each of the touch sensing electrodes includes a plurality of extensions, and each of the extensions is parallel to the plurality of touch driving electrodes to increase the touch sensing electrodes and The mutual capacitive coupling amount between the plurality of touch driving electrodes. The touch display device of claim 14, wherein the display device further comprises a first polarizing layer, a light shielding layer and a first substrate on the plurality of driving electrodes, wherein the plurality of touch sensing electrodes Located in each of the layers on the plurality of drive electrodes, or between the layers. A common electrode is disposed in a display device, and the common electrode is coupled with a pixel electrode to drive a liquid crystal layer, wherein the common electrode comprises: a plurality of touch driving electrodes, wherein the common electrode other than the plurality of touch driving electrodes is coupled to a DC current to form a shielding region, wherein the plurality of touch driving electrodes are provided with a driving signal, and the plurality of self-complex The touch sensing electrode receives the sensing signal to detect the contact of the at least one external object according to the capacitive coupling between the plurality of touch driving electrodes and the plurality of touch driving electrodes. A driving method for driving a plurality of touch driving electrodes in a touch display device, the driving method comprising: when the display display device updates a horizontal pixel line, the touch display device continuously provides a driving signal to at least one Touch drive electrodes for mutual capacitance detection. According to the driving method of claim 22, the driving direction of the plurality of touch driving electrodes is opposite to the updating scanning direction of the horizontal pixel lines. According to the driving method of claim 22, the method further includes: determining whether the horizontal pixel line in the update scan is within an influence range of the driven at least one touch driving electrode; and when the horizontal pixel line in the update scan is located When the range is outside the range, the at least one touch driving electrode is continuously driven; when the horizontal pixel line in the update scan is within the influence range, the driving of the at least one touch driving electrode is paused; and the horizontal pixel line is continuously updated and scanned to leave After the range of influence, the at least one touch driving electrode is further driven.