TWI496039B - Touch device and control method - Google Patents

Description

Touch device and control method thereof

The present invention relates to a sensing device and a control method thereof, and more particularly to a touch device and a control method therefor.

A conventional resistive touch panel mainly includes a first conductive layer, a second conductive layer, and a plurality of spacers. The spacer balls are located between the first conductive layer and the second conductive layer to separate the first conductive layer and the second conductive layer, so as to avoid a short circuit caused by no touch and cause an erroneous action. The first conductive layer and the second conductive layer are respectively responsible for detecting different axial positions of the touch, for example, the first conductive layer is responsible for detecting the position of the X direction, and the second conductive layer is responsible for detecting the position of the Y direction, wherein X The direction is perpendicular to the Y direction.

During operation, the first conductive layer and the second conductive layer are each applied with a different voltage. When the user touches the touch panel, the corresponding touch region of the first conductive layer and the second conductive layer correspond to each other. The area of the touch will contact to cause a voltage change between the first conductive layer and the second conductive layer respectively, and the position of the touch in the X direction can be known by detecting the voltage change of the first conductive layer, and by detecting The voltage change of the second conductive layer can be known to be in the Y direction.

In order to detect a voltage change of the first conductive layer, a plurality of first electrodes may be disposed on a first side of the first conductive layer. In addition, in order to detect a voltage change of the second conductive layer, a second side of the second conductive layer may be disposed with a plurality of second electrodes, wherein the first side is perpendicular to the second side. The first electrodes and the second electrodes are electrically connected to the drive integrated circuit (drive IC) through a plurality of wires. However, since the first electrode is located on the same side of the first conductive layer, The second electrode is also located on the same side of the second conductive layer, and a single side of the peripheral area of the touch panel requires a large space to configure the wires, so that a single side of the peripheral area of the touch panel is too wide. As a result, the touch panel is unsightly when disposed on the display, and the applicability of the touch panel to different displays is limited.

The invention provides a touch device to solve the problem that a single side of a peripheral area of a touch panel is too wide.

The invention provides a control method suitable for the above touch device to improve the judgment accuracy of the touch point position.

An embodiment of the present invention provides a touch device including a first conductive film, a plurality of first electrodes, a first auxiliary electrode, a plurality of second electrodes, a second auxiliary electrode, and a second conductive film. The first conductive film has a first side, a second side opposite to the first side, a first area connecting the first side and the second side, and a second area connecting the first side and the second side, wherein The first zone is adjacent to the second zone. The first electrodes are spaced apart from each other at a portion of the first side of the first region and electrically connected to the first region. The first auxiliary electrode is disposed on a portion of the first side located on one side of the second region, and is electrically connected to the second region. The first auxiliary electrode is spaced apart from and adjacent to the first electrodes. The second electrodes are spaced apart from each other on a portion of the second side of the second side and electrically connected to the second region. The second auxiliary electrode is disposed on a portion of the second side of the other side of the first region, and is electrically connected to the first region. The second auxiliary electrode is spaced apart from and adjacent to the second electrodes. The second conductive film is disposed on one side of the first conductive film. When the touch device is in an unpressed state, the first conductive film and the second conductive film are maintained at a separation distance. When the touch device is in a pressed state, the first conductive film is pressed Touch the second conductive film.

Another embodiment of the present invention provides a control method suitable for controlling the touch device. This control method includes the following steps. First, the first electrode, the first auxiliary electrode, one of the second electrode and the second auxiliary electrode are in a reading state, and a first reference voltage is applied to the first electrode, the first auxiliary electrode, and the like. At least a portion of the other of the second electrode and the second auxiliary electrode, and applying a second reference voltage to the second conductive film. When the electrode closest to the second region among the first electrodes is in the reading state, at least the second auxiliary electrode is not applied with a voltage. When the first auxiliary electrode is in the reading state, at least the electrode closest to the first region of the second electrode is not applied with a voltage. When the electrode closest to the first region among the second electrodes is in the reading state, at least the first auxiliary electrode is not applied with a voltage. When the second auxiliary electrode is in the reading state, at least the electrode closest to the second region of the first electrode is not applied with a voltage.

In the embodiment of the present invention, since the first electrode and the second electrode electrically connected to the first conductive film are respectively disposed on opposite sides of the first conductive film, the peripheral region of the conventional touch panel can be effectively solved. The problem that the touch device of the embodiment of the present invention can be more beautifully disposed on the display has better applicability. In addition, in order to make the voltage environment of the electrode on the first side relatively uniform for each electrode, the control method of the embodiment of the present invention does not apply an appropriate electrode on the second side at an appropriate timing. The voltage can improve the accuracy of the position of the pressed device (ie, the touch point) of the touch device and the control method according to the embodiment of the present invention. On the contrary, in order to make the voltage environment of the electrode on the second side relatively uniform for each electrode, the control method of the embodiment of the present invention reads the appropriate electrode on the first side at an appropriate timing. The state also has the above effects.

In order to make the above features and advantages of the present invention more obvious, the following is a specific The embodiment is described in detail with reference to the drawings.

First embodiment

1A is a cross-sectional view of a touch device according to a first embodiment of the present invention, FIG. 1B is a top view of a conductive film, an electrode, and a wire in the touch device of FIG. 1A, and FIG. 1C is a touch device of FIG. An exploded view of the first conductive film, the electrode electrically connected to the first conductive film, the second conductive film, and the electrode electrically connected to the second conductive film. Referring to FIG. 1A to FIG. 1C , the touch device 100 of the present embodiment includes a first substrate 140 and a second substrate 150 disposed opposite to each other. The first substrate 140 is made of, for example, an elastic material, and the second substrate 150 is made of, for example, a rigid material to carry a certain pressure. In the present embodiment, the first substrate 140 is, for example, a polyester film, and the second substrate 150 is, for example, a glass substrate.

A first conductive film 110 is disposed on a surface of the first substrate 140 facing the second substrate 150, and a second conductive film 120 is disposed on a surface of the second substrate 150 facing the first substrate 140. In other words, the first conductive film 110 is disposed on one side of the second conductive film 120. In this embodiment, the touch device 100 further includes an adhesive layer 130 disposed between the first conductive film 110 and the second conductive film 120 and located at the edge of the first conductive film 110 and the second conductive film 120. The first substrate 140 provided with the first conductive film 110 is bonded to the second substrate 150 provided with the second conductive film 120.

When the touch device 100 is in an unpressed state (in the present embodiment, when the first substrate 140 is not pressed), the first conductive film 110 and the second conductive film 120 are maintained at a spaced distance and are electrically insulated from each other. In the present embodiment, the separation distance is, for example, 2 to 10 μm. In addition, in the embodiment, a plurality of discrete spacers are disposed between the first conductive film 110 and the second conductive film 120. 160, these spacers 160 have an insulating and supporting action to keep the first conductive film 110 and the second conductive film 120 separated when they are not pressed. However, when the size of the touch device 100 is small, it is also possible to select not to use the spacer 160, but only to ensure that the first conductive film 110 and the second conductive film 120 can maintain electrical insulation when not pressed. . When the touch device 100 is in a pressed state (in the present embodiment, when the first substrate 140 is pressed), the pressed portion of the first conductive film 110 is in contact with the pressed portion of the second conductive film 120.

The touch device 100 of the present embodiment further includes a plurality of first electrodes 210, a plurality of auxiliary electrodes 220, a plurality of second electrodes 230, and a plurality of auxiliary electrodes 240. The first conductive film 110 has a first side S1, a second side S2 with respect to the first side S1, a first area A1 connecting the first side S1 and the second side S2, and a connecting first side S1 and the first side The second zone A2 of the two sides S2, wherein the first zone A1 is adjacent to the second zone A2. The first electrodes 210 are disposed at intervals on a side of the first side S1 at a side of the first area A1 and are electrically connected to the first area A1. In the present embodiment, the first side S1 is substantially parallel to the Y direction in the drawing and is substantially perpendicular to the X direction in the drawing, wherein the X direction is perpendicular to the Y direction.

The auxiliary electrode 220 is disposed on a portion of the first side S1 at a side of the second area A2 and electrically connected to the second area A2. In this embodiment, the auxiliary electrode 220 includes a first auxiliary electrode 220a and a third auxiliary electrode 220b. The first auxiliary electrode 220a is adjacent to the first region A1 and is spaced apart from and adjacent to the first electrodes 210. The third auxiliary electrode 220b is spaced apart from and adjacent to the first auxiliary electrode 220a. The third auxiliary electrode 220b is adjacent to the first region A1, and the first auxiliary electrode 220a is located between the third auxiliary electrode 220b and the first electrode 210.

The second electrodes 230 are spaced apart from each other on a portion of the second side S2 located at a side of the second region A2 and electrically connected to the second region A2. The auxiliary electrode 240 is disposed on a portion of the second side S2 located at a side of the first area A1, and is electrically connected Connect to the first zone A1. In this embodiment, the auxiliary electrode 240 includes a second auxiliary electrode 240a and a fourth auxiliary electrode 240b. The second auxiliary electrode 240a is adjacent to the second region A2 and is spaced apart from and adjacent to the second electrodes 230. The fourth auxiliary electrode 240b is spaced apart from and adjacent to the second auxiliary electrode 240a, the fourth auxiliary electrode 240b is adjacent to the second region A2, and the second auxiliary electrode 240a is located between the fourth auxiliary electrode 240b and the second electrode 230.

In this embodiment, the first electrodes 210 and the auxiliary electrodes 220 may be disposed at equal intervals, and the second electrodes 230 and the auxiliary electrodes 240 may be equally spaced, but the invention is not limited thereto. In addition, in this embodiment, the electrodes closest to the first region A1 of the second electrodes 230 (the second electrode 230e in this embodiment) are arranged in a first reference corresponding to the first auxiliary electrode 220a. On the straight line L1, the second electrode of the second electrode 230 adjacent to the first region A1 (the second electrode 230d in this embodiment) is arranged on the third reference line L3 corresponding to the third auxiliary electrode 220b. The electrode of the first electrode 210 closest to the second region A2 (the first electrode 210e in this embodiment) is arranged on the second reference line L2 corresponding to the second auxiliary electrode 240a. The electrode of the second electrode A2 adjacent to the second region A2 (the first electrode 210d in this embodiment) is arranged on the fourth reference line L4 corresponding to the fourth auxiliary electrode 240b. Further, the first reference line L1, the second reference line L2, the third reference line L3, and the fourth reference line L4 are substantially parallel to each other, and the first reference line L1 is substantially perpendicular to the first side S1 and the second side S2 . The first electrode 210, the second electrode 230, the auxiliary electrode 220, and the auxiliary electrode 240 can be used to determine the position of the pressed portion (ie, the touch point) in the Y direction.

In this embodiment, the touch device 100 further includes a plurality of third electrodes 250 disposed on a third side S3 of the second conductive film 120 and electrically connected to the second Conductive film 120. One end of the third side S3 is adjacent to one end of the first side S1, and the other end of the third side S3 is adjacent to one end of the second side S2. The third side S3 can be substantially parallel to the X direction. In addition, in the embodiment, the third electrodes 250 are disposed at equal intervals, for example, but the invention is not limited thereto. The third electrode 250 can be used to determine the position of the pressed portion (ie, the touch point) in the X direction.

The first conductive film 110 and the second conductive film 120 are each, for example, a conductive film having an anisotropic material. Specifically, the first conductive film 110 and the second conductive film 120 are each, for example, a carbon nano-tube film (CNT), which is a transparent conductive film in this embodiment. In addition, in this embodiment, the main conductive direction of the first conductive film 110 is substantially perpendicular to the first side S1 and the second side S2 (in this embodiment, substantially parallel to the first reference line L1), and second The main conductive direction of the conductive film 120 is substantially perpendicular to the third side S3 (which is perpendicular to the first reference line L1 in this embodiment), and the main conductive direction of the first conductive film 110 (in this embodiment, X) The direction) is substantially perpendicular to the main conductive direction of the second conductive film 120 (in the present embodiment, the Y direction).

In the touch device 100 of the embodiment, the first electrode 210 and the second electrode 230 electrically connected to the first conductive film 110 are respectively disposed on opposite sides of the first conductive film 110 (ie, the first side S1 and the first side) The two sides S2), so that the wires 260 connecting the first electrode 210, the auxiliary electrode 220, the second electrode 230 and the auxiliary electrode 240 are distributed on opposite sides of the peripheral region P1 of the touch device 100, so that the conventional touch can be effectively solved. The problem that the single side of the control panel is too wide, the touch device 100 of the present embodiment can be more beautifully disposed on a display (not shown), and has better applicability to different types of displays. In addition, when the position of the pressed portion (ie, the touch point) of the touch device 100 is between the first reference line L1 and the second reference line L2, the design of the auxiliary electrode 220 can improve the accuracy of the position determination of the touch point. .

It should be noted that the third electrode 250 is not limited to be disposed on the same side of the second conductive film 120 (ie, the third side S3). In other embodiments, depending on the needs of the user, The third electrode 250 is disposed on the fourth side S4 of the second conductive film 120, the fourth side S4 is opposite to the third side S3, and the other portion of the third electrode 250 is disposed on the third side S3 of the second conductive film 120. The first electrode 210 and the second electrode 230 are disposed on opposite sides of the first conductive film 110. Further, an auxiliary electrode may be provided on the third side S3 and the fourth side S4. In addition, the present invention does not limit the number of the third auxiliary electrode 220b and the fourth auxiliary electrode 240b to one. In other embodiments, the number of the third auxiliary electrode 220b may be multiple, and the fourth auxiliary electrode 240b The number may be plural, and the third auxiliary electrodes 220b are arranged at intervals, and the fourth auxiliary electrodes 240b are arranged at intervals.

Second embodiment

2 is a top plan view showing a conductive film, an electrode, and a wire in a touch device according to a second embodiment of the present invention. Referring to FIG. 2, the touch device 100' of the present embodiment is similar to the touch device 100 of FIG. 1B, and the main difference between the two is that the touch device 100' of the present embodiment has the first auxiliary electrode 220a and the second auxiliary. The electrode 240a does not have the third auxiliary electrode 220b and the fourth auxiliary electrode 240b of FIG. 1B. In other words, in the present embodiment, there is only one auxiliary electrode 220 on the first side S1, and only one auxiliary electrode 240 on the second side S2.

Third embodiment

Fig. 3 is a flow chart showing a control method of a third embodiment of the present invention. Referring to FIG. 1A, FIG. 1B and FIG. 3, the control method of this embodiment is suitable for controlling the touch device 100 of the above embodiment. This control method includes the following steps. First, execute the step Step S110, in which one of the first electrode 210 and the first auxiliary electrode 220a is in a read state, and a second reference voltage is applied to the second conductive film 120. In this embodiment, the first electrode 210, the auxiliary electrode 220, the second electrode 230, and the auxiliary electrode 240 are electrically connected to a driving circuit (not shown) through a wire 260, for example, a drive integrated circuit. Drive IC). In this embodiment, the drive circuit is adapted to cause the electrodes connected thereto to assume two different states, a drive state and a read state. In the driving state, the driving circuit applies a first reference voltage to the electrodes connected thereto, and in the reading state, the driving circuit causes the electrodes to be in a floating state or a high impedance state. The time drive circuit does not apply a voltage to the electrodes connected thereto and is adapted to read the voltage of the electrodes connected thereto.

In this embodiment, the first electrode 210a~210e and the first auxiliary electrode 220a are sequentially in a read state by taking one of the first electrode 210 and the first auxiliary electrode 220a in a read state. Further, applying the second reference voltage to the second conductive film 120 can be achieved by applying a second reference voltage to the third electrode 250.

When any one of the first electrode 210 and the first auxiliary electrode 220a is in a read state, a first reference voltage is applied to the other of the first electrode 210 and the first auxiliary electrode 220a. In this embodiment, the first reference voltage is also applied to the third auxiliary electrode 220b at this time. For example, when the first electrode 210c is in the reading state, the first reference electrode is applied to the first electrodes 210a-210b and 210d-210e, the first auxiliary electrode 220a, and the third auxiliary electrode 220b. However, in other embodiments, when any one of the first electrode 210 and the first auxiliary electrode 220a is in the reading state, only the first reference voltage may be applied to the first electrode 210 and the first auxiliary electrode. Some of the other electrodes in 220a are, for example, electrodes that apply a first reference voltage to the read state Nearby electrodes. Furthermore, the first reference voltage is not equal to the second reference voltage. In this embodiment, the first reference voltage is, for example, 0 volts, and the second reference voltage is, for example, 5 volts, but the invention is not limited thereto.

When the electrode of the first electrode 210 closest to the second region A2 (in this embodiment, the first electrode 210e) is in the reading state, at least the second auxiliary electrode 240a is not applied with a voltage, for example, at the reading. Taking the state, that is, at this time, in order to increase the accuracy of the voltage value read by the first electrode 210e, the second auxiliary electrode 240a may be in a floating dynamic or high-impedance state instead of being in a driving state, which may be The voltage value read by the first electrode 210e is prevented from being disturbed by the second auxiliary electrode 240a. At this time, the auxiliary electrode 240a is in the reading state not for reading the voltage value, but for the second auxiliary electrode 240a not to be applied with voltage in the floating dynamic or high impedance state, so the driving circuit may not read the second auxiliary at this time. The voltage value of the electrode 240a, or even if the voltage value is read, is not used.

Similarly, when the first auxiliary electrode 220a is in the reading state, at least the electrode closest to the first region A1 of the second electrode 230 (in this embodiment, the second electrode 230e) is not applied with a voltage, for example, Is in the read state. At this time, the driving circuit can read the voltage value of the first auxiliary electrode 220a, but does not read the voltage value of the second electrode 230e, or even if the voltage value of the second electrode 230e is read, the voltage value is not use.

Similarly, in the embodiment, when the second electrode of the first electrode 210 close to the second region A2 (ie, the first electrode 210d) is in the reading state, at least the fourth auxiliary electrode 240b is not applied with voltage. , for example, in a read state. At this time, the driving circuit can read the voltage value of the first electrode 210d, but does not read the voltage value of the fourth auxiliary electrode 240b, or even if the voltage value of the fourth auxiliary electrode 240b is read, the voltage value is not Adopted.

Since the electrodes on both sides of the first electrodes 210b to 210d are in the driving state when the first electrodes 210b to 210d are in the reading state, in order to make the first auxiliary electrode 220a have such an environment, in the embodiment, when the first auxiliary electrode 220a is in the reading state, When the state is taken, the first reference voltage is applied to the third auxiliary electrode 220b. In order to further improve the consistency of the reading environment, in the embodiment, when any one of the first electrodes 210 is in the reading state, the first reference voltage may be applied to the third auxiliary electrode 220b.

Next, step S120 is performed. Step S120 is similar to step S110. The difference between the two is mainly that the control object is a different electrode, and the effect to be achieved is the same. Therefore, only the step valve S120 is briefly described below, and the details refer to the description of step S110. Step S120 is: taking one of the second electrode 230 and the second auxiliary electrode 240 in a read state (for example, sequentially placing the second electrodes 230a 230 230 and the second auxiliary electrode 240 in a read state), and applying the first The second reference voltage is applied to the second conductive film 120. When any one of the second electrode 230 and the second auxiliary electrode 240a is in the reading state, the first reference voltage is applied to at least a portion of the other of the second electrode 230 and the second auxiliary electrode 240a. When the electrode of the second electrode 230 closest to the first region A1 is in the reading state, at least the first auxiliary electrode 240a is not applied with a voltage, for example, in a read state. When the second auxiliary electrode 240a is in the reading state, at least the electrode of the first electrode 210 closest to the second region A2 is not applied with a voltage, for example, in a read state.

Similarly, in this embodiment, when the second electrode of the second electrode 230 adjacent to the first region A1 (ie, the second electrode 230d) is in the reading state, at least the third auxiliary electrode 220b is not applied with voltage. , for example, in a read state. At this time, the driving circuit can read the voltage value of the second electrode 230d, but does not read the voltage value of the third auxiliary electrode 220b, or even if the third auxiliary electrode is read. The voltage value of 220b, but this voltage value is also not used.

Further, in the present embodiment, when the second auxiliary electrode 240a is in the reading state, the first reference voltage is applied to the fourth auxiliary electrode 240b such that the reading environment of the second auxiliary electrode 240a is close to the other electrodes.

In order to further improve the consistency of the reading environment, in the embodiment, when any one of the second electrodes 230 is in the reading state, the first reference voltage may be applied to the fourth auxiliary electrode 240b.

It should be noted that the present invention does not limit the execution order to perform step S110 before performing step S120. In other embodiments, step S120 may be performed before step S110. Alternatively, each of the reading steps included in step S110 and the reading steps included in step S120 may be sequentially performed in various possible arrangement orders. In other words, each of the reading steps in step S110 and the reading steps in step S120 may be interleaved.

In the present embodiment, step S130 may be further performed to alternately turn one of the third electrodes 250 into a read state and apply a first reference voltage to the first conductive film 110. In the present embodiment, applying the first reference voltage to the first conductive film 110 is, for example, causing the driving circuit to apply a first reference voltage to the first electrode 210, the auxiliary electrode 220, the second electrode 230, and the auxiliary electrode 240. When any one of the third electrodes 250 is in the read state, a second reference voltage is applied to the other of the third electrodes 250. In other embodiments, it is also possible to apply a second reference electrode to some of the other electrodes of the third electrodes 250, such as electrodes in the vicinity of the third electrode 250 in the read state.

In this embodiment, step S140 may be further performed, which is read according to the electrodes (for example, the first electrode 210, the first auxiliary electrode 220a, the second electrode 230, the second auxiliary electrode 240a, and the third electrode 250). The voltage value taken, Calculate the position of the pressed (ie touch point). Specifically, when the touch device 100 is pressed, the first electrode 210 and the second electrodes 230 respectively include an extreme value among a plurality of voltage values sensed in the read state. In this embodiment, since the first reference voltage is smaller than the second reference voltage, the extreme value is a maximum value and is greater than the first reference voltage. The control method of the embodiment further includes calculating, according to the extreme value and the two voltage values respectively sensed by the two electrodes adjacent to the electrode sensing the extreme value, the touched device is pressed (ie, touched Point) a position in a direction substantially parallel to the first side S1 (ie, the Y direction).

In addition, the third electrodes 250 respectively include an extreme value among the plurality of voltage values sensed in the read state. In this embodiment, since the first reference voltage is smaller than the second reference voltage, the extreme value is a minimum value. And less than the second reference voltage. The control method of the embodiment further includes calculating, according to the minimum value and the two voltage values respectively sensed by the two electrodes adjacent to the electrode sensing the minimum value, the touched device is pressed (ie, touched Point) a position in a direction substantially parallel to the third side S3 (i.e., the X direction).

The detailed calculation method is as follows: the voltage signals read by the first electrode 210, the second electrode 230, the first auxiliary electrode 220a and the second auxiliary electrode 240a include an extreme voltage signal and a first voltage. The signal and a second voltage signal, the extreme voltage signal is the largest of the voltage signals, and the electrodes reading the three signals are referred to herein as a first sensing electrode, a second sensing electrode, and a third sense. Measuring electrode. The first voltage signal is derived from the first sensing electrode, the extreme voltage signal is derived from the second sensing electrode, and the second voltage signal is derived from the third sensing electrode. The second sensing electrode is located between the first sensing electrode and the third sensing electrode, and the second sensing electrode is adjacent to the first sensing electrode and the third sensing electrode, respectively. The first sensing electrode, the second sensing electrode, and the third sensing electrode are sequentially arranged along the Y direction.

Each of the sensing electrodes is spaced apart from each other. The calculation method of the position of the touch point in the Y direction includes a plurality of operational parameters including a difference between the extreme voltage signal and the first voltage signal, and an extreme voltage. The difference between the signal and the second voltage signal and the above spacing. This calculation method contains three equations, which are described as follows:

Where Δ1 is the difference between the extreme voltage signal minus the first voltage signal, Δ2 is the difference between the extreme voltage signal minus the second voltage signal and P _y is the above spacing, and ΔS is the calculated touch point in Y The position in the direction is smaller than the difference in position of the second sensing electrode in the Y direction. Therefore, after ΔS is calculated by the above equation, ΔS is added to the position of the second sensing electrode in the Y direction, that is, the position of the touch point in the Y direction is calculated. The position of the touch point in the X direction can also be calculated according to a method similar to the above, and will not be described again. The above calculation method and calculation formula are referred to herein as a three-point interpolation method and a three-point interpolation formula.

The method for detecting the position of the touch point in the Y direction disclosed above is applicable to the case where the touch point is located between the fifth reference line L5 and the sixth reference line L6, wherein the fifth reference line L5 and the sixth reference line L6 are substantially The upper side is parallel to the first reference line L1, the fifth reference line L5 is the center line between the first electrodes 210b and 210c, and the sixth reference line L6 is the center line between the second electrodes 230b and 230c. However, when the touch point is located below the fifth reference line L5 in the figure or above the sixth reference line L6 in the figure, since the first electrode is not provided under the first electrode 210a or the second electrode 230a, the second The voltage signal is subjected to the correction of the three-point interpolation edge correction method described below and then substituted into the above three-point difference formula, which is not directly incorporated into the three-point interpolation formula as described above.

The following is an example in which the touch point is located below the fifth reference line L5 in FIG. 1B. For the same reason, the processing method in which the touch point is located above the sixth reference line L6 can be derived, and thus will not be described herein.

If the touch point is below the fifth reference line L5, the first electrode 210a is the first sensing electrode, the first electrode 210b is the second sensing electrode, and the first electrode 210c is the third sensing electrode. The three-point interpolation edge correction method has an association established according to the first reference voltage, a third voltage signal and a fourth voltage signal, and the manner of obtaining the third voltage signal and the fourth voltage signal is as follows.

The center line between the first electrode 210a and the first electrode 210b is defined as a seventh reference line L7 that is substantially parallel to the first reference line L1.

When the seventh reference line L7 changes the first reference voltage on the seventh reference line L7 due to the pressing, the third voltage signal is obtained from the first sensing electrode, and the fourth voltage signal is obtained from the second sensing electrode. . Further, the position at which the first reference voltage of the seventh reference line L7 is changed is separated from the third side S3 by a distance equal to the distance of the touch point position from the third side S3.

The three-point interpolation edge correction method can be expressed by a three-point interpolation edge correction formula: V4=Vr-(Vr-V3)×(Vr-V2)/(Vr-V1), where V1 is the third The voltage signal, V2 is the fourth voltage signal, V3 is the first voltage signal, V4 is a modified voltage signal, and Vr is the first reference voltage.

Therefore, when the current Y-direction touch position is below the fifth reference line L5, the first voltage signal obtained from the first sensing electrode is corrected by the three-point interpolation edge correction method to obtain a correction voltage. The signal, and then the second voltage signal, the extreme voltage signal and the correction voltage signal are brought into the three-point interpolation formula to obtain the position of the touch point in the Y direction. At this time, Δ2 in the three equations included in the three-point interpolation method is the difference between the extreme voltage signal minus the corrected voltage signal.

The three-point interpolation edge correction method can also be applied to the third electrode 250, and details are not described herein again.

Further, when the touch point falls below the seventh reference line L7 in FIG. 1B or falls over the area above the center line of the second electrode 230a and the second electrode 230b, the following two-point interpolation edge correction method can be used to obtain Touch the coordinates of the point in the Y direction.

For example, when the touch point is below the seventh reference line L7, the electrode closest to the origin in the Y direction is the first electrode 210a, and the electrode near the origin is the first electrode 210b. When V ₁ is the maximum voltage, the touch point position Yt satisfies the following two-point interpolation edge correction formula:

Wherein V _r is the first reference voltage, V ₁ is the voltage sensed by the first electrode 210a, V ₂ is the voltage sensed by the first electrode 210b, and P _y is the distance between the first electrode 210a and the first electrode 210b. Y1 is the position of the first electrode 210a in the Y direction, where V _r > V ₂ > V ₁ . In this way, when the touch point falls below the seventh reference line L7, the position of the touch point in the Y direction can be calculated more accurately.

The two-point interpolation edge correction method can also be applied to the third electrode 250, and details are not described herein again.

It should be noted that when the touch point falls between the first reference line L1 and the second reference line L2, since the first auxiliary electrode 220a is reading, the third auxiliary electrode 220b is still applied to the first reference. The voltage, and since the second auxiliary electrode 240a is still under reading, the fourth auxiliary electrode 240b is still applied with the first reference voltage, so that the three-point interpolation edge correction method or the two-point interpolation edge correction method may not be used at this time. . In other words, by applying the first reference voltage to the third auxiliary electrode 220b and the fourth auxiliary electrode 240b, the position of the touch point can be accurately determined. Sex.

Thereafter, steps S110 to S140 may be repeatedly performed to achieve the effect of dynamically monitoring the change of the touch point position.

According to the above, when the first electrode 210 and the first auxiliary electrode 220a located on the first side S1 are in the read state, the control method of the embodiment does not cause the appropriate electrode located on the second side S2 to be not at the appropriate timing. The voltage is applied so that the voltage environment of the electrode on the first side S1 is relatively uniform for each electrode, so that the touch device 100 and the control method of the embodiment can be improved (ie, the touch point) The accuracy of the position judgment. On the contrary, when the second electrode 230 and the second auxiliary electrode 240a located on the second side S2 are in the read state, the control method of the embodiment does not apply the appropriate electrode on the first side S1 at an appropriate timing. The voltage also has the above effects.

Fourth embodiment

Referring to FIGS. 1A and 1B, the control method of the present embodiment is similar to the control method of the third embodiment, and the main differences between the two are as follows. In the control method of the third embodiment, when the electrode located at the first side S1 has the opposite electrode on the second side S2, and when the electrode of the first side S1 is in the reading state, the electrode of the second side S2 is made No voltage is applied, such as in a read state, and vice versa. However, in order to ensure the voltage environment of the electrode at the time of reading, in the present embodiment, when the electrode of the first side S1 is in the reading state, the opposite electrode and the opposite pair of electrodes located on the second side S2 are not applied. The voltage, for example, is in a read state. In addition, when the electrode of the first side S1 above the fourth reference line L4 is in the reading state, at least the electrode of the Y-axis coordinate on the second side S2 under the reading electrode is not applied with a voltage, for example Is in the read state. On the contrary, when the electrode located at the second side S2 and under the third reference line L3 is in the reading state, at least the first The Y-axis coordinate on the side S1 is located on the electrode above the read electrode without being applied with a voltage, for example in a read state. The details are as follows.

In this embodiment, when the third electrode of the first electrode 210 near the second region A2 (ie, the first electrode 210c) is in the reading state, at least the fourth auxiliary electrode 240b is not applied with a voltage, for example, Read status. When the second electrode of the first electrode 210 close to the second region A2 (ie, the first electrode 210d) is in the reading state, at least the fourth auxiliary electrode 240b and the second auxiliary electrode 240a are not applied with a voltage, for example, Read status. When the electrode of the first electrode 210 closest to the second region A2 (ie, the first electrode 210e) is in the reading state, at least the electrode of the second electrode 230 closest to the first region A1 (ie, the second) The electrode 230e), the fourth auxiliary electrode 240b, and the second auxiliary electrode 240a are not applied with a voltage, for example, in a read state. When the first auxiliary electrode 220a is in the reading state, at least two of the second electrodes 230 closest to the first region A1 (ie, the second electrodes 230d and 230e), the fourth auxiliary electrode 240b, and the second auxiliary are provided. The electrode 240a is not applied with a voltage, for example, in a read state. When the third of the second electrodes 230 adjacent to the first region A1 (ie, the second electrode 230c) is in the read state, at least the third auxiliary electrode 220b is not applied with a voltage, for example, in a read state. When the second electrode of the second electrode 230 adjacent to the first region A1 (ie, the second electrode 230d) is in the reading state, at least the third auxiliary electrode 220b and the first auxiliary electrode 220a are not applied with a voltage, for example, Read status. When the electrode of the second electrode 230 closest to the first region A1 (ie, the second electrode 230e) is in the reading state, at least the electrode of the first electrode 210 closest to the second region A2 (ie, the first The electrode 210e), the third auxiliary electrode 220b, and the first auxiliary electrode 220a are not applied with a voltage, for example, in a read state. When the second auxiliary electrode 240a is in the reading state, at least two of the first electrodes 210 closest to the second region A2 are made The poles (ie, the first electrodes 210d and 210e), the third auxiliary electrode 220b, and the first auxiliary electrode 220a are not applied with a voltage, for example, in a read state.

Fifth embodiment

Referring to FIG. 1A and FIG. 1B, the control method of the present embodiment is similar to the control method of the fourth embodiment, and the main difference between the two is that the control method of the embodiment causes more oblique electrodes to be applied without voltage, specifically The situation is as follows.

In the present embodiment, when any one of these electrodes in the first electrode 210 of the third to N ₇ close to the second area A2 is in the reading of a state of the fourth auxiliary electrode 240b is not applied to at least a voltage, e.g. In the read state, where N ₇ is a natural number greater than 3. When the second electrode of the first electrode 210 adjacent to the second region A2 is in the reading state, at least the N ₈ electrodes, the fourth auxiliary electrode 240b and the first of the second electrodes 230 are closest to the first region. The second auxiliary electrode 240a is not applied with a voltage, for example, in a read state, where N ₈ is a natural number greater than zero. When the electrode of the first electrode 210 closest to the second region A2 is in the reading state, at least the N ₉ electrodes, the fourth auxiliary electrode 240b and the first of the second electrodes 230 which are closest to the first region A1 are provided. The second auxiliary electrode 240a is not applied with a voltage, for example, in a read state, where N ₉ is a natural number greater than one. When the first auxiliary electrode 220a is in the reading state, at least the N ₁₀ electrodes, the fourth auxiliary electrode 240b, and the second auxiliary electrode 240a which are closest to the first region A1 of the second electrodes 230 are not applied with a voltage, for example, In a read state, where N ₁₀ is a natural number greater than two. When any one of the third to _N11th electrodes of the second electrode 230 is close to the first region A1, the third auxiliary electrode 220b is not subjected to a voltage, for example, in a read state, wherein N ₁₁ is a natural number greater than 3. When the second electrode of the second electrode 230 adjacent to the first region A1 is in the reading state, at least the N ₁₂ electrodes and the third auxiliary electrode 220b of the first electrode 210 closest to the second region A2 are disposed. The first auxiliary electrode 220a is not applied with a voltage, for example, in a read state, where N ₁₂ is a natural number greater than zero. When the electrode of the second electrode 230 closest to the first region A1 is in the reading state, at least the N ₁₃ electrodes, the third auxiliary electrode 220b and the first of the first electrodes 210 closest to the second region A2 are made. An auxiliary electrode 220a is not applied with a voltage, for example, in a read state, where N ₁₃ is a natural number greater than one. When the second auxiliary electrode 240a is in the reading state, at least the N ₁₄ electrodes, the third auxiliary electrode 220b, and the first auxiliary electrode 220a of the first electrodes 210 closest to the second region A2 are not applied with a voltage, for example, In a read state, where N ₁₄ is a natural number greater than two.

In an embodiment, when any one of the first electrode 210 and the first auxiliary electrode 220a is in the reading state, all the electrodes located on the second side S2 may be not applied with a voltage. On the contrary, when any one of the second electrode 230 and the second auxiliary electrode 240a is in the reading state, all the electrodes on the first side S1 can be not applied with a voltage.

Sixth embodiment

Referring to FIG. 2, the control method of this embodiment is similar to the control method of the third embodiment, and the difference between the two is as follows. The control method of this embodiment is applicable to the touch device 100' of FIG. Since the touch device 100' does not have the third auxiliary electrode 220b and the fourth auxiliary electrode 240b of FIG. 1B, the control method of the embodiment does not need to control the third auxiliary electrode 220b and the fourth auxiliary electrode 240b, and the rest The control method is the same as that of the third embodiment.

It should be noted that, in this embodiment, when the touch point falls between the center line of the first electrodes 210d and 210e and the first reference line L1, and when the first auxiliary electrode 220a reads, due to the first There is no other electrode above the auxiliary electrode 220a to apply the first reference voltage, so the above three-point interpolation edge correction can be used at this time. The method calculates the position of the touch point in the Y direction. Similarly, when the touch point falls between the center line of the second electrodes 230d and 230e and the second reference line L2, and when the second auxiliary electrode 240a reads, the above three-point interpolation edge correction method can also be used. To calculate the position of the touch point in the Y direction.

In addition, when the touch point falls between the eighth reference line L8 (ie, the center line of the first electrode 210e and the first auxiliary electrode 220a, which is parallel to the first reference line L1) and the first reference line L1, Two-point interpolation edge correction method and calculating the position of the touch point in the Y direction according to the reading of the first electrode 210e and the first auxiliary electrode 220a, or using the three-point interpolation edge correction method according to the second electrode 230d, The reading of the 230e and the second auxiliary electrode 240a calculates the position of the touch point in the Y direction. Similarly, when the touch point falls between the eighth reference line L8 and the second reference line L2, the electrode located on the second side S2 can also be used to read and calculate the touch using the two-point interpolation edge correction method. The position of the point in the Y direction, or the electrode located at the first side S1 is read and the position of the touch point in the Y direction is calculated by the three-point interpolation edge correction method.

Seventh embodiment

Referring to FIG. 2, the control method of the present embodiment is similar to the control method of the sixth embodiment, and the main differences between the two are as follows. In order to ensure the voltage environment of the electrode at the time of reading, in the present embodiment, when the electrode of the first side S1 is in the reading state, the opposite electrode on the second side S2 and the paired electrode are also not applied with a voltage. The details are as follows.

When the second of the first electrodes 210 adjacent to the second region A2 is in the read state, at least the second auxiliary electrode 240a is not applied with a voltage. When the electrode of the first electrode 210 closest to the second region A2 is in the reading state, at least the second auxiliary electrode 240a and the second electrode 230 are at least The electrode near the first region A1 is not applied with a voltage. When the first auxiliary electrode 220a is in the reading state, at least the second auxiliary electrode 240a, the electrode of the second electrode 230 closest to the first area A1, and the second of the second electrodes 230 are closer to the first area A1. The electrodes are not applied with a voltage. When the second of the second electrodes 230 adjacent to the first region A1 is in the reading state, at least the first auxiliary electrode 220a is not applied with a voltage. When the electrode of the second electrode 230 closest to the first region A1 is in the reading state, at least the first auxiliary electrode 220a and the electrode of the first electrode 210 closest to the second region A2 are not applied with a voltage. When the second auxiliary electrode 240a is in the reading state, at least the first auxiliary electrode 220a, the electrode of the first electrode 210 closest to the second region A2, and the second of the first electrodes 210 are closer to the first region A2. The electrodes are not applied with a voltage.

Eighth embodiment

Referring to FIG. 2, the control method of this embodiment is similar to the control method of the seventh embodiment, and the main difference between the two is that the control method of this embodiment causes more oblique electrodes to be in the read state, and the specific situation is as follows: Said.

When any one of these electrodes in the first electrode 210 of the second through N ₁ close to the second area A2 is in the reading of a state, the second auxiliary electrode 240a at least the voltage is not applied, where N ₁ is greater than 2 Natural number. When the electrode of the first electrode 210 closest to the second region A2 is in the reading state, at least the N ₂ electrodes and the second auxiliary electrode 240a of the second electrodes 230 which are closest to the first region A1 are not A voltage is applied, where N ₂ is a natural number greater than one. When the first auxiliary electrode 220a is in the reading state, at least the N ₃ electrodes and the second auxiliary electrode 240a which are closest to the first region A1 of the second electrodes 230 are not applied with a voltage, wherein N ₃ is greater than 2. Natural number. When any one of the second to N _4th electrodes of the second electrode 230 is close to the first region A1, at least the first auxiliary electrode 220a is not applied with a voltage, wherein N ₄ is greater than 2. Natural number. When the electrode of the second electrode 230 closest to the first region A1 is in the reading state, at least the first auxiliary electrode 220a and the N ₅ electrodes of the first electrodes 210 closest to the second region A2 are not applied. Voltage, where N ₅ is a natural number greater than one. When the second auxiliary electrode 240a is in the reading state, at least the N ₆ electrodes of the first electrodes 210 closest to the second region A1 and the first auxiliary electrode 220a are not applied with a voltage, wherein N ₆ is greater than 2. Natural number.

In an embodiment, when any one of the first electrode 210 and the first auxiliary electrode 220a is in the reading state, all the electrodes located on the second side S2 may be not applied with a voltage. On the contrary, when any one of the second electrode 230 and the second auxiliary electrode 240a is in the reading state, all the electrodes on the first side S1 can be not applied with a voltage.

In summary, in the embodiment of the present invention, since the first electrode and the second electrode electrically connected to the first conductive film are respectively disposed on opposite sides of the first conductive film, the conventional touch can be effectively solved. The problem that the single side of the peripheral area of the panel is too wide, so that the touch device of the embodiment of the present invention can be more beautifully disposed on the display, and has better applicability. In addition, when the first electrode and the first auxiliary electrode on the first side are in the read state, the control method of the embodiment of the present invention does not apply a voltage to the appropriate electrode on the second side at an appropriate timing. Therefore, the voltage environment of the electrode on the first side is relatively uniform for each electrode, so that the accuracy of the touch device and the control method of the touch point position of the embodiment of the present invention can be improved. On the contrary, when the second electrode and the second auxiliary electrode on the second side are in the read state, the control method of the embodiment of the present invention does not apply the voltage to the appropriate electrode on the first side at an appropriate timing. Have the above effects.

Although the present invention has been disclosed above by way of example, it is not intended to limit the present invention. It is to be understood that the scope of the invention is defined by the scope of the appended claims. quasi.

100, 100'‧‧‧ touch devices

110‧‧‧First conductive film

120‧‧‧Second conductive film

130‧‧‧Adhesive layer

140‧‧‧First substrate

150‧‧‧second substrate

160‧‧‧ spacer

210, 210a~210e‧‧‧ first electrode

220, 240‧‧‧ auxiliary electrode

220a‧‧‧First auxiliary electrode

220b‧‧‧ third auxiliary electrode

230, 230a~230e‧‧‧second electrode

240a‧‧‧second auxiliary electrode

240b‧‧‧4th auxiliary power

250‧‧‧ third electrode

260‧‧‧ wire

A1‧‧‧First District

A2‧‧‧Second District

L1‧‧‧ first reference line

L2‧‧‧ second reference line

L3‧‧‧ third reference line

L4‧‧‧ fourth reference line

L5‧‧‧ fifth reference line

L6‧‧‧ sixth reference line

L7‧‧‧ seventh reference line

L8‧‧‧ eighth reference line

P1‧‧‧ surrounding area

S1‧‧‧ first side

S2‧‧‧ second side

S3‧‧‧ third side

S4‧‧‧ fourth side

S110~S140‧‧‧Steps

1A is a cross-sectional view of a touch device according to a first embodiment of the present invention.

FIG. 1B is a top view of a conductive film, an electrode, and a wire in the touch device of FIG. 1A.

1C is an exploded view of the first conductive film, the electrode electrically connected to the first conductive film, the second conductive film, and the electrode electrically connected to the second conductive film in the touch device of FIG. 1A.

2 is a top plan view showing a conductive film, an electrode, and a wire in a touch device according to a second embodiment of the present invention.

Fig. 3 is a flow chart showing a control method of a third embodiment of the present invention.

100‧‧‧ touch device

110‧‧‧First conductive film

210, 210a~210e‧‧‧ first electrode

220, 240‧‧‧ auxiliary electrode

220a‧‧‧First auxiliary electrode

220b‧‧‧ third auxiliary electrode

230, 230a~230e‧‧‧second electrode

240a‧‧‧second auxiliary electrode

240b‧‧‧fourth auxiliary electrode

250‧‧‧ third electrode

260‧‧‧ wire

A1‧‧‧First District

A2‧‧‧Second District

L1‧‧‧ first reference line

L2‧‧‧ second reference line

L3‧‧‧ third reference line

L4‧‧‧ fourth reference line

L5‧‧‧ fifth reference line

L6‧‧‧ sixth reference line

L7‧‧‧ seventh reference line

P1‧‧‧ surrounding area

S1‧‧‧ first side

S2‧‧‧ second side

S3‧‧‧ third side

S4‧‧‧ fourth side

Claims (12)

A touch device includes: a first conductive film having a first side, a second side opposite to the first side, a first area connecting the first side and the second side, and a connection a first area and a second area of the second side, wherein the first area is adjacent to the second area; the plurality of first electrodes are spaced apart from each other on a side of the first side a portion, and electrically connected to the first region; a first auxiliary electrode disposed on a portion of the first side of the second region and electrically connected to the second region, wherein the first portion An auxiliary electrode is spaced apart from and adjacent to the first electrodes; a plurality of second electrodes are spaced apart from each other at a portion of the second side of the second side, and are electrically connected to the a second auxiliary electrode is disposed on a portion of the second side of the second side of the first region and electrically connected to the first region, wherein the second auxiliary electrode and the second portion The two electrodes are spaced apart from each other and adjacent to each other; and a second conductive film is disposed on one side of the first conductive film. The touch device of claim 1, further comprising a plurality of third electrodes, wherein the second conductive film has a third side, and the third electrodes are disposed on the third side of the second conductive film And electrically connected to the second conductive film, one end of the third side is adjacent to one end of the first side, and the other end of the third side is adjacent to one end of the second side. The touch device of claim 2, wherein the first conductive film and the second conductive film each have an anisotropic material. The touch device of claim 3, wherein a main conductive direction of the first conductive film is substantially perpendicular to the first side and the second side, and a main conductive direction of the second conductive film is substantially perpendicular On the third side, and the first The main conductive direction of the conductive film is substantially perpendicular to the main conductive direction of the second conductive film. The touch device of claim 1, wherein the electrode closest to the first region of the second electrodes is aligned with the first auxiliary electrode on a first reference line, The electrode of the first electrode closest to the second region is arranged on the second reference line corresponding to the second auxiliary electrode, the first reference line is substantially parallel to the second reference line, and the first The reference line is substantially perpendicular to the first side and the second side. The touch device of claim 1, further comprising: at least one third auxiliary electrode disposed on the portion of the first side of the side of the second region, and electrically connected to the portion a second region, wherein the third auxiliary electrode is spaced apart from and adjacent to the first auxiliary electrode, and the first auxiliary electrode is located between the third auxiliary electrode and the first electrodes; and at least one fourth auxiliary electrode a portion of the second side of the first side of the first region and electrically connected to the first region, wherein the fourth auxiliary electrode and the second auxiliary electrode are spaced apart from each other and adjacent to each other, and The second auxiliary electrode is located between the fourth auxiliary electrode and the second electrodes. The touch device of claim 6, wherein the electrode closest to the first region of the second electrodes is aligned with the first auxiliary electrode on a first reference line, The second electrode of the second electrode adjacent to the first region is arranged on the third reference line corresponding to the third auxiliary electrode, and the electrode of the first electrodes closest to the second region is The second auxiliary electrodes are correspondingly arranged on a second reference line, and the second one of the first electrodes adjacent to the second area is arranged on the fourth reference line corresponding to the fourth auxiliary electrode, First reference line, the first The second reference line, the third reference line and the fourth reference line are substantially parallel to each other, and the first reference line is substantially perpendicular to the first side and the second side. A control method for controlling the touch device of claim 1, wherein the control method comprises: the first electrode, the first auxiliary electrode, the second electrode, and the second auxiliary electrode One of the first reference voltages is applied to at least a portion of the first electrode, the first auxiliary electrode, the second electrode, and other electrodes of the second auxiliary electrode, and is applied a second reference voltage to the second conductive film; when the electrode of the first electrodes closest to the second region is in the read state, at least the second auxiliary electrode is not applied with a voltage; When the first auxiliary electrode is in the reading state, at least the electrode closest to the first region of the second electrode is not applied with a voltage; when the electrode of the second electrode is closest to the first region In the read state, at least the first auxiliary electrode is not applied with a voltage; and when the second auxiliary electrode is in the read state, at least the electrode of the first electrode closest to the second region is No voltage is applied. The control method of claim 8, further comprising: when the second electrode of the first electrode adjacent to the second region is in the reading state, at least the second auxiliary electrode is not Applying a voltage; when the electrode of the first electrodes closest to the second region is in the read state, at least the second auxiliary electrode and the second of the second electrodes are closest to the first region The electrode is not applied with a voltage; when the first auxiliary electrode is in the reading state, at least the second auxiliary electrode, the electrode of the second electrode closest to the first region, and the a second of the second electrodes adjacent to the first region is not applied with a voltage; and when the second of the second electrodes adjacent to the first region is in the read state, at least the first The auxiliary electrode is not applied with a voltage; when the electrode closest to the first region of the second electrodes is in the reading state, at least the first auxiliary electrode and the first electrodes are closest to the first The electrode of the two regions is not applied with a voltage; and when the second auxiliary electrode is in the read state, at least the first auxiliary electrode, the electrode of the first electrodes closest to the second region, and the The second of the first electrodes adjacent to the second region is not applied with a voltage. The control method of claim 8, wherein the touch device further comprises: at least one third auxiliary electrode disposed on the side of the first side of the side of the second region, and Connected to the second region, wherein the third auxiliary electrode is spaced apart from and adjacent to the first auxiliary electrode, and the first auxiliary electrode is located between the third auxiliary electrode and the first electrodes; and at least one a fourth auxiliary electrode disposed on the portion of the second side of the side of the first region and electrically connected to the first region, wherein the fourth auxiliary electrode and the second auxiliary electrode are spaced apart from each other Adjacent, and the second auxiliary electrode is located between the fourth auxiliary electrode and the second electrodes, and the controlling method further comprises: when the second of the first electrodes is adjacent to the second region, the electrode is In the reading state, at least the fourth auxiliary electrode is not applied with a voltage; and when the second of the second electrodes adjacent to the first region is in the reading state, at least the third auxiliary is The electrodes are not applied with a voltage. The control method of claim 10, further comprising: applying the first reference power when the first auxiliary electrode is in the reading state Pressing to the third auxiliary electrode; and applying the first reference voltage to the fourth auxiliary electrode when the second auxiliary electrode is in the read state. The control method of claim 10, further comprising: when the third electrode of the first electrode adjacent to the second region is in the reading state, at least the fourth auxiliary electrode is not Applying a voltage; when the second of the first electrodes adjacent to the second region is in the read state, at least the fourth auxiliary electrode and the second auxiliary electrode are not applied with a voltage; When the electrode closest to the second region of the electrode is in the reading state, at least the electrode closest to the first region, the fourth auxiliary electrode and the second auxiliary electrode are the second of the second electrodes No voltage is applied; when the third of the second electrodes near the first region is in the read state, at least the third auxiliary electrode is not applied with a voltage; when the second electrodes are When the electrode adjacent to the first region is in the read state, at least the third auxiliary electrode and the first auxiliary electrode are not applied with a voltage; and when the second electrode is closest to the first region When the electrode is in the read state, at least The first electrodes of the plurality of electrodes closest to the second area, the third auxiliary electrode and the first auxiliary electrode voltage is not applied.