WO2014121759A1

WO2014121759A1 - Capacitive pen, capacitive touch-control panel and touch-control device

Info

Publication number: WO2014121759A1
Application number: PCT/CN2014/071901
Authority: WO
Inventors: 向国威; 赵亮; 伍松林; 郑洋
Original assignee: 汉王科技股份有限公司
Priority date: 2013-02-08
Filing date: 2014-02-08
Publication date: 2014-08-14
Also published as: CN103984422B; CN103984422A

Abstract

Provided in the present disclosure is a capacitive pen for operating on a capacitive touch-control panel (200), comprising: a receiving unit (1) for receiving a measurement signal transmitted by the capacitive touch-control panel (200), a signal processing unit (5) for generating a high voltage signal synchronous with the measurement signal according to the signal received by the receiving unit (1), and a transmitting unit (2) for transmitting the high voltage signal to the capacitive touch-control panel (200) such that the capacitive touch-control panel (200) obtains the information of a capacitive pen (100). The capacitive pen of the present disclosure transmits a synchronous high voltage signal to enhance the sensing signal of a touch-control panel, such that the touch-control panel can sense a small-area conductor, thus expanding the function of the pen on the basis of finger touch control, and greatly improving user experience. In addition, the circuit is easy to realize, and has low cost and good compatibility.

Description

Capacitive pen, capacitive touch panel and touch device

The present disclosure relates to touch technologies, and in particular, to a capacitive pen, a capacitive touch panel, and a touch device. Background technique

At present, capacitive touch screens are easy to operate and have high sensitivity, which has become the first choice for touch devices at this stage. The capacitive screen used in capacitive touch screens is generally made of a transparent conductive ITO (indium tin oxide) film in a glass or other transparent material to form a conductive film of a cross-sectional structure, which can serve as a transmitting electrode and a receiving electrode. When the finger clicks on the screen, a coupling capacitance is formed with both the transmitting electrode and the receiving electrode, and a part of the current is absorbed from the contact point, thereby causing a change in the signal of the receiving electrode. That is, the capacitive touch screen detects the touch position of the conductor on the capacitive screen by the change of the electric field formed by the conductive film when the conductor is touched, thereby realizing the human-computer interaction function.

However, if a thin tip is used to operate the capacitive screen, the tip of the pen will absorb some of the current from the contact point. However, since the tip of the pen is very thin, the absorption current has little effect on the receiving electrode and is difficult to detect, making the capacitive touch screen impossible. Determine the touch location. In order to have a large influence on the receiving electrode, the tip of the capacitive pen must be thick in addition to the conductive characteristics, which makes the pen have problems such as poor writing fluency, accurate clicking, and no pressure-sensitive characteristics, so that the writing cannot be achieved. effect. Summary of the invention

In view of the above problems, the present disclosure provides a capacitive pen that can enhance the intensity of a received signal of a capacitive touch panel and improve positioning accuracy.

An aspect of the present disclosure provides a capacitive pen for operating on a capacitive touch panel, comprising: a receiving unit that receives a measurement signal sent by the capacitive touch panel; and a signal processing unit that receives the signal according to the receiving The signal received by the unit generates a high voltage signal synchronized with the measurement signal; and a transmitting unit that transmits the high voltage signal to the capacitive touch panel to enable the capacitive touch panel to acquire information of the capacitive pen.

The capacitive pen provided by the present disclosure enhances the intensity of the received signal of the capacitive touch panel by transmitting a high voltage signal synchronized with the measurement signal of the capacitive touch panel, and improves the signal to noise ratio and the positioning accuracy.

Another aspect of the present disclosure provides a capacitive touch panel on which a capacitive pen can perform a touch operation, including: a first electrode group; a second electrode group; and a control processing unit, wherein the first electrode group And the second electrode group is disposed to cross each other, the control processing unit controls one of the first electrode group and the second electrode group Transmitting, as a transmitting electrode, a measurement signal, the control processing unit controlling one of the first electrode group and the second electrode group as a receiving electrode to receive a signal sent by the capacitive pen; the control processing unit acquiring the response signal according to the response signal The information of the capacitive pen.

The capacitive touch panel provided by the present disclosure has good support for the capacitive pen, and can realize the precise positioning of the capacitive pen.

A further aspect of the present disclosure provides a touch device including a capacitive pen; and a capacitive touch panel, wherein the capacitive touch panel includes a first electrode group and a second electrode group and a control processing unit that cross each other; Control processing unit controls one of the first electrode group and the second electrode group to transmit a measurement signal as a transmitting electrode, and the control processing unit controls one of the first electrode group and the second electrode group to receive the capacitor as a receiving electrode a signal sent by the pen; the capacitive pen includes a receiving unit that receives the measurement signal sent by the capacitive touch panel; and a signal processing unit that generates a high voltage signal synchronized with the measurement signal according to the signal received by the receiving unit And a transmitting unit that transmits the high voltage signal to the capacitive touch panel, and the control processing unit determines a position of the capacitive pen according to the signal received by the receiving electrode.

The touch device provided by the present disclosure adopts a capacitive coupling method, and uses a conductive pen tip of the capacitive pen as a transmitting unit to transmit a high-voltage pulse signal synchronized with a measurement signal sent by a transmitting electrode of the capacitive touch panel, so that the tip and capacitance of the capacitive pen are touched. A larger voltage difference is formed between the control panels. In this way, the electric field between the cap of the capacitive pen and the capacitive touch panel is increased, so that the pen tip absorbs more current from the contact point, thereby enhancing the signal of the capacitive pen detected by the receiving electrode of the capacitive touch panel, and ensuring the capacitive pen Has a very thin tip. The touch device provided by the present disclosure has a simple process and a low cost. DRAWINGS

1 is a schematic structural view of an embodiment of a touch device according to the present disclosure;

2 is a schematic structural view of a capacitive pen 100 and a capacitive touch panel 200;

3 is a circuit schematic diagram of the capacitive pen 100;

4 is a circuit schematic diagram of the pulse generating unit 51;

FIG. 5 is a schematic structural diagram of a capacitive touch panel 200;

FIG. 6 is a schematic diagram of positioning of the touch device 300;

7 is a schematic diagram of command information analysis of the touch device shown in FIG. 1;

8 is a schematic diagram of command information arrangement of the touch device shown in FIG. 1;

FIG. 9 is a specific implementation of the command parsing unit 53; FIG. 10 shows a waveform of a signal waveform transmitted by the capacitive pen 100 and a received signal intensity of the capacitive touch surface under an inverted signal command;

Figure 11 shows the waveform of the signal transmitted by the finger and the received signal strength of the capacitive touch surface under the command of the inverted signal. detailed description

In order to enable those skilled in the art to better understand the technical solutions of the present disclosure, the capacitive pen, the capacitive touch panel and the touch device provided by the present disclosure are described in detail below with reference to the accompanying drawings and specific embodiments. In the drawings, the same or corresponding components are denoted by the same reference numerals. The following are only the best embodiments of the capacitive pen, the capacitive touch panel and the touch device of the present disclosure, and the present disclosure is not limited to the following structure.

FIG. 1 is a schematic structural view of an embodiment of a touch device according to the present disclosure. As shown in FIG. 1, the touch device 300 of the present embodiment includes a capacitive pen 100 and a capacitive touch panel 200. The capacitive touch panel 200 transmits the measurement signal, and the capacitive pen 100 receives the measurement signal, and sends a high voltage signal synchronized with the measurement signal to the capacitive touch panel 200. The capacitive touch panel 200 acquires the information of the capacitive pen 100 according to the high voltage signal. The information includes the tip pressure and/or button information of the capacitive pen.

2 is a schematic structural view of a capacitive pen 100 and a capacitive touch panel 200.

As shown in FIG. 2, the capacitive touch panel 200 includes a plurality of electrodes 101 and 102 arranged to intersect each other. For the sake of brevity, only a pair of mutually perpendicular electrodes are shown.

The capacitive pen 100 includes a receiving unit 1, a transmitting unit 2, a shield case 3, and a housing 4, and a signal processing unit 5 (see Fig. 3) is disposed in the housing 4. When the capacitive pen 100 is located in the touch area of the capacitive touch panel 200, the receiving unit 1 receives the measurement signal sent by the transmitting electrode (such as the electrode 101), and the signal processed by the signal processing unit 5 disposed in the housing 4 according to the receiving unit 1 A high voltage signal synchronized with the measurement signal is generated, and the high voltage signal is sent to the capacitive touch panel 200 through the transmitting unit 2, and the capacitive touch panel 200 determines the position of the capacitive pen 100 according to the signal received by the receiving electrode (such as the electrode 102). It should be noted that the electrode 101 or the electrode 102 may be both a transmitting electrode and a receiving electrode.

In the present embodiment, the receiving unit 1 is a ring-shaped conductive pen tip, the transmitting unit 2 is a conductive pen tip having a small diameter, and the ring-shaped conductive pen tip is located around the conductive pen tip. When the capacitive pen 100 is located in the touch area of the capacitive touch panel 200, the annular conductive tip can form a coupling capacitance with the transmitting electrode 101 to receive the measurement signal sent by the transmitting electrode 101. The area of the annular conductive tip is sufficient to ensure a large coupling capacitance with the transmitting electrode 101, thereby effectively receiving the measurement signal. The shape of the conductive tip can also be determined according to the specific situation, for example, Flat, tapered or hemispherical.

When the capacitive pen 100 is located in the touch area of the capacitive touch panel 200, the transmitting unit 1 and the receiving electrode 102 form a coupling capacitance, thereby transmitting a high voltage signal synchronized with the measurement signal sent by the transmitting electrode 101. In the present embodiment, as the tip of the transmitting unit 2 has a diameter of less than 3 mm, the tip end can be wrapped with a softer material such as rubber to improve writing comfort.

The shielding cover 3 is disposed between the receiving unit 1 and the transmitting unit 2 in a ring shape for isolating the receiving unit 1 and the transmitting unit 2 to prevent a coupling capacitance between the receiving unit 1 and the transmitting unit 2, so that the signal forms a feedback path. Causes self-oscillation. The receiving unit 1, the transmitting unit 2 and the shield 3 are insulated from each other.

The housing 4 is used to fix the receiving unit 1, the transmitting unit 2 and the shield 3, and the circuit inside the pen. The end of the casing 4 is provided with an opening so that the end of the tip of the transmitting unit 2 in contact with the capacitive touch panel 200 can protrude therefrom. The size of the opening corresponds to the thickness of the nib. The portion of the casing 4 that is in contact with the hand is a conductor. Since the human body itself is a large capacitance, it is more stable than the capacitive pen 100. By connecting the capacitive pen 100 to the human body, the stability of the received signal can be enhanced.

FIG. 3 is a circuit schematic diagram of the capacitive pen 100. As shown in FIG. 3, the signal processing unit 5 includes a signal amplifying unit 50, a pulse generating unit 51, a switching unit 52, a command analyzing unit 53, a control unit 54, a pen information acquiring unit 55, and a boosting unit 56.

The signal amplifying unit 50 is, for example, an amplifier for amplifying the signal received by the receiving unit 1. The signal amplifying unit 50 can also be omitted if the received signal is sufficiently strong.

The pulse generating unit 51 is operative to generate a pulse signal synchronized with the measurement signal based on the signal received by the receiving unit 1. The pulse signal leads all the way to the switching unit 52, and the other path leads to the command parsing unit 53.

The switching unit 52 includes a switching circuit and an inverter for switching the pulse signal generated by the pulse generating unit 51 between in-phase and in-phase. When it is necessary to send a high voltage signal in phase with the measurement signal, the switch is turned on to the upper circuit to allow the pulse signal to pass directly; when a high voltage signal inverted from the measurement signal needs to be transmitted, the switch is turned on, and the inverter is turned on. The pulse signal is inverted by an inverter.

The command parsing unit 53 is, for example, a hardware circuit for parsing command information included in the pulse signal generated by the pulse generating unit 51.

The control unit 54 responds to the command by at least one of the command control pulse generating unit 51, the switching unit 52, and the pen information acquiring unit 55 parsed by the command parsing unit 53.

The pen information acquisition unit 55 is for acquiring the pen tip pressure of the capacitive pen 100 and the button information.

The boosting unit 56 is configured to convert the input pulse signal into a high voltage signal, and the high voltage signal passes through the transmitting unit 2 is sent to the capacitive touch panel 200.

It should be noted that the positions of the signal amplifying unit 50, the pulse generating unit 51, and the switching unit 52 can be interchanged. For example, the switching unit 52 may be located in front of the signal amplifying unit 50 and the pulse generating unit 51; or the switching unit 52 may be located between the signal amplifying unit 50 and the pulse generating unit 51. The positions of the signal amplifying unit 50, the pulse generating unit 51, and the switching unit 52 can be adjusted as needed.

4 is a circuit schematic diagram of the pulse generating unit 51. As shown in Fig. 4, the pulse generating circuit 51 is composed of resistors R1, R2 and R3, a capacitor C1 and a comparator. Since the output voltage is switched between the reference voltages Vref and 0, the voltage at the non-inverting input of the comparator is determined by the voltage division of resistors R1 and R2, which varies around the reference voltage Vref. The signal received by the receiving unit 1 is a peak which fluctuates around the reference voltage Vref as shown by the waveform of the input terminal in FIG. 4. As long as the ratio of the resistors R1 and R2 is adjusted, the input peak can be just exceeded the positive phase of the comparator. Input the voltage and filter out the noise to get a good square pulse signal.

It should be noted that FIG. 4 is only a specific example of the pulse generating unit of the present disclosure, and the disclosure is not limited to the circuit, and those skilled in the art can select a suitable pulse generating circuit as needed, as long as it can generate a matching synchronous pulse. The signal can be.

FIG. 5 is a schematic structural view of the capacitive touch panel 200. As shown in FIG. 5, the capacitive touch panel 200 includes a first electrode group 201 and a second electrode 202 group and a control processing unit 203. The first electrode group 201 and the second electrode 202 are mutually intersected to form a touch area, and the touch area is covered with an insulating layer to prevent the finger or other conductor from contacting the first electrode group 201 and the second electrode 202. The first electrode group 201 and the second electrode group 202 are insulated from each other, and a coupling capacitance is formed at the intersection.

One of the first electrode group 201 and the second electrode group 202 is a transmitting electrode, and the other group is a receiving electrode. If the first electrode group 201 is a transmitting electrode, the second electrode group 202 is a receiving electrode. If the first electrode group 201 is a receiving electrode, the second electrode group 202 is a transmitting electrode. Both can be switched under the control of the control processing unit 203. Alternatively, the control processing unit 203 controls the first electrode group 201 or the second electrode group 202 as a transmitting electrode to transmit a measurement signal containing command information and as a receiving electrode to receive a response signal transmitted from the capacitive pen 100. That is, the control processing unit 203 controls one of the first electrode group 201 and the second electrode group 202) to transmit a measurement signal as a transmission electrode, and the control processing unit 203 controls one of the first electrode group 201 and the second electrode group 202 as reception. The electrode receives the signal sent by the capacitive pen 100.

The control processing unit 203 controls the transmitting electrode to transmit a measurement signal, processes the signal received by the receiving electrode, and determines the touch position based on the processing result.

When the capacitive pen 100 is located in the touch area of the capacitive touch panel 200, the receiving unit 1 and the transmitting electrode are shaped As a coupling capacitor, the transmitting unit 2 forms a coupling capacitance with the receiving electrode, so that the capacitive pen 100 can receive the measurement signal transmitted by the transmitting electrode through the receiving unit 1 and transmit the synchronization signal to the receiving electrode through the transmitting unit 2.

Since the area of the transmitting unit 2 of the capacitive pen 100 is small, the coupling capacitance with the receiving electrode of the capacitive touch panel 200 is small. If the high voltage signal is not transmitted, the signal received by the receiving electrode will be small, the signal to noise ratio is low, and it is difficult to locate. To this end, the capacitive pen 100 of the present disclosure transmits a high voltage signal synchronized with the measurement signal to enhance the received signal strength, improving the signal to noise ratio and positioning accuracy. Specifically, the capacitive pen 100 can extract command information from the measurement signal; at the same time, respond according to the extracted command information, and send the response result to the receiving electrode through the transmitting unit 2, and the control processing unit 203 determines the capacitive pen according to the signal received by the receiving electrode. 100 touch information, such as touch position, tip pressure, button information, and the like.

The capacitive pen 100 further includes a power supply unit (not shown), and the power supply unit is a battery or a super capacitor, and the battery or the super capacitor is used to supply the capacitor pen with the DC-DC.

FIG. 6 is a schematic diagram of positioning of the touch device 300. As shown in FIG. 6, when the capacitive pen 100 is located in the touch area of the capacitive touch panel 200, the control processing unit 203 selects the X-axis electrode as the receiving electrode, and measures the reception of each of the two adjacent X-axis electrodes as a group. The differential value of the signal. For example, electrodes and ₂ -groups, electrodes X ₂ and 3⁄4 groups, electrodes _3⁄4 and X ₄ - groups, and so on. The coordinates of the capacitive pen 100 in the X-axis direction can be calculated by receiving the difference value of the signals by the respective sets of electrodes. Similarly, the Y-axis electrode can be used as the receiving electrode, and the coordinates of the capacitive pen 100 on the Y-axis can be measured.

A single receiving electrode of the X-axis can also be scanned one by one, and the intensity of the received signal of each receiving electrode is measured, and the coordinates of the capacitive pen 100 in the X-axis direction are obtained by the intensity of the received signal of each receiving electrode. The coordinates of the capacitive pen 100 on the Y-axis are obtained in the same manner.

Of course, the positioning method of the touch device 300 is different from the above two types, and can be specifically set according to actual requirements.

In the touch device 300 provided by the present disclosure, in order to coordinate the capacitive pen 100 with the capacitive touch panel 200, a protocol for command information and data transmission is established. The command information is transmitted by the control processing unit 203 of the capacitive touch panel 200, and the capacitive pen 100 receives the measurement signal carrying the command information through the receiving unit 1, and parses the command information through the signal processing unit 5, and responds accordingly. The response signal is sent to the capacitive touch panel 200 through the transmitting unit 2.

In this embodiment, the command information mainly includes the following three types:

1. An inverted signal generation command instructing the capacitive pen 100 to transmit a signal synchronized with the measurement signal and inverted to the capacitive touch panel 200. 2. The capacitive pen information acquisition command indicates that the capacitive pen 100 measures the pen tip pressure and the button information on the pen, and stores it after the measurement.

3. The capacitive pen information sending command indicates that the capacitive pen 100 converts the stored pen tip pressure, button or other information into a pulse waveform and feeds back to the capacitive touch panel 200.

For example, the measurement signal can be modulated, and the idle state of the measurement wave is not sent as a command for a certain period of time. When the transmitting electrode is idle for a period of time without transmitting the measurement signal and remains in the low state, the capacitive pen 100 can detect that no waveform is emitted during this time. Therefore, different commands can be defined according to the length of time of the low level, and are identified by the command parsing unit 53 or the control unit 54 of the capacitive pen 100.

As shown in Figure 7, the transmitting electrode stops transmitting pulses and remains low (as indicated by the dashed line in Figure 7). After a period of time, the transmitting electrode restarts transmitting the measuring wave. The capacitive pen 100 detects the transmission stop, and can parse various commands according to different lengths of time by the command parsing unit 53. It can also be timed by the control unit 54 to parse the command according to the length of the timer. Based on the length of time, the capacitive pen 100 determines the type of command and then reacts accordingly.

The waveform A of FIG. 7 represents the response waveform of the capacitive pen 100 after receiving the capacitive pen information transmission command. The data transmission protocol defined in the present embodiment is as follows: During the measurement signal high pulse, if the signal sent by the transmitting unit 2 is a rising edge , the transmission data is 1; if the signal sent by the transmission unit 2 is a falling edge, it indicates that the transmission data is 0. The transmit unit signal is only allowed to have one rising or falling edge during the measurement signal high pulse.

The waveform B of Fig. 7 indicates the inverted signal wave transmitted after the capacitive pen 100 receives the command to transmit the inverted signal wave.

The waveform C of Fig. 7 indicates that the capacitive pen 100 receives the capacitive pen information acquisition command, and the pen tip does not need to transmit a signal, during which the measurement of the tip pressure and the button is performed.

It should be noted that the command durations corresponding to the waveforms of the segments A, B, and C in Fig. 7 are different. Here, for the sake of understanding, the waveform command termination bits are aligned.

It should also be noted that, in the present disclosure, the method of programming the commands is not limited to a low level of a certain length. It is also possible to use a high level of a certain length; or a high level and a low level with a certain timing combination relationship; or a pulse waveform having a certain timing combination; or a waveform waveform having a certain degree of recognizability, such as a pulse waveform having an envelope structure continuously transmitted; Can be used as an order. Figure 8 illustrates some examples of various ways of command programming, such as using a certain level of high level; or having a certain timing combination of high and low levels; or a pulse waveform with a certain timing combination; or an envelope structure with continuous transmission The pulse waveform, but not limited to the listed arrangement.

As shown in FIG. 8, the waveform A in FIG. 8 indicates that the idle low-level encoding command information is used for a certain period of time, FIG. The waveform B in the middle indicates the idle high level encoding command information for a certain period of time; the waveform C in Fig. 8 indicates the idle high level encoding command information for a certain period of time with an idle low level for a certain period of time; waveform D in Fig. 8 Indicates that a medium length pulse is followed by a longer length of pulse coded command information. Waveform E in Fig. 8 indicates that command information is encoded with a single long pulse; waveform F in Fig. 8 indicates that a plurality of consecutive bits are short. The pulses form a certain length of envelope waveform encoding command information.

FIG. 9 shows a specific embodiment of the command parsing unit 53. This embodiment is mainly directed to an encoding method in which the idle state of the measurement wave is not transmitted for a certain period of time. The length of the charge and discharge time of the capacitor is matched with the unidirectional characteristic of the diode to extract the command signal. The command parsing unit 53 can also extract command signals using other circuit configurations.

When the touch device 300 provided by the present disclosure is used, the human hand can easily contact the capacitive touch panel 200, thereby affecting the positioning of the capacitive touch pen 100 by the capacitive touch panel 200. To this end, the present disclosure provides a method of eliminating the influence of a human hand on the positioning of the capacitive pen 100. The method will be described below with reference to Figs. 10 and 11.

In the present disclosure, the transmitting electrode of the capacitive touch panel 200 sends a measurement signal including the command information for transmitting the inverted signal, and after the capacitive pen 100 receives the measurement signal including the command information for transmitting the inverted signal, the transmitting unit 2 (pen tip) transmits and The high-voltage signals of the above-mentioned measurement signals are in phase and inversion. The capacitive touch panel 200 obtains waveforms of two received signal strengths that change with the receiving electrodes according to the two high-voltage signals (see the left and middle of the c-curve in FIG. 10). Waveform), and subtracting the two waveforms can remove the interference of the human hand on the capacitive pen 100.

As shown in FIG. 10, after the touch panel 200 sends a measurement signal carrying a command to transmit an inverted signal, the capacitive pen 100 transmits two high-voltage signals that are in phase and in phase with the measurement signal. Therefore, the received signal strength of the receiving electrode of the capacitive touch panel 200 appears as two opposite waveforms (see the waveforms on the left and the middle of the c-curve in Fig. 10). If the finger is replaced, as shown in FIG. 11, since the finger does not actively send a signal, the received signal strength of the capacitive touch panel 200 receiving electrode appears as two identical waveforms. By subtracting the measured two waveforms, it is easy to remove the interference of the finger on the pen, and also enhance the strength of the received signal, which is beneficial to improve the positioning accuracy and enhance the user experience.

The above embodiments are merely exemplary embodiments employed to explain the principles of the present disclosure, but the disclosure is not limited thereto. Various modifications and improvements can be made by those skilled in the art without departing from the spirit and scope of the disclosure. These variations and modifications are also considered to be the protection intervals of the present disclosure.

Claims

Rights request

A capacitive pen for operating on a capacitive touch panel, comprising:

Receiving, receiving the measurement signal sent by the capacitive touch panel;

a signal processing unit that generates a high voltage signal synchronized with the measurement signal according to a signal received by the receiving unit; and

The sending unit sends the high voltage signal to the capacitive touch panel to enable the capacitive touch panel to obtain information of the capacitive pen.

2. The capacitive pen according to claim 1, wherein the signal processing unit comprises:

a pulse generating unit that generates a pulse signal synchronized with the measurement signal according to the signal received by the receiving unit; and a boosting unit that converts the pulse signal generated by the pulse generating unit into a high voltage signal.

The capacitive pen according to claim 2, wherein the signal processing unit further comprises:

The pen information acquiring unit is configured to acquire the capacitor pen tip pressure and/or button information.

4. The capacitive pen according to claim 2, wherein the signal processing unit further comprises:

And a switching unit, configured to switch signals in the capacitive pen between in-phase and in-phase.

The capacitive pen according to claim 4, wherein the signal processing unit further comprises:

The control unit controls at least one of the pulse generation unit, or the switching unit and the pen information acquisition unit according to command information in the measurement signal.

The capacitive pen according to claim 5, wherein the signal processing unit further comprises:

And a command parsing unit, configured to parse the command information in the measurement signal, and send the obtained command information to the control unit.

7. The capacitive pen of claim 1 further comprising

a shield disposed between the receiving unit and the transmitting unit to isolate the receiving unit and the transmitting unit.

A capacitive touch panel on which a capacitive pen can perform a touch operation, wherein the capacitive touch panel includes:

First electrode group;

a second electrode group interposed with the second electrode group; and

a control processing unit, controlling one of the first electrode group and the second electrode group to transmit a measurement signal including command information as a transmitting electrode, and controlling one of the first electrode group and the second electrode group to receive the capacitor as a receiving electrode a response signal sent by the pen, and acquiring information of the capacitive pen according to the response signal.

9. The capacitive touch panel of claim 8, wherein the information of the capacitive pen comprises at least one of a capacitive pen position, a tip pressure, and button information.

The capacitive touch panel of claim 9, wherein the command information comprises at least one of an inverted signal generation command, a capacitive pen information acquisition command, and a capacitive pen information transmission command, wherein

The inverted signal generation command instructs the capacitive pen to generate an inverted high voltage signal;

The capacitive pen information acquisition command instructs the capacitive pen to obtain the tip pressure and/or the button information of the capacitive pen; the capacitive pen information transmission command instructs the capacitive pen to transmit a signal including the tip pressure and/or the button information of the capacitive pen.

The capacitive touch panel according to claim 10, wherein

The transmitting electrode transmits a measuring wave including an inverted signal generating command, and determines a position of the capacitive pen based on the in-phase high voltage signal and the inverted high voltage signal generated by the capacitive pen.

12. The capacitive touch panel of claim 8, wherein the command information is modulated onto the measurement signal.

13. A touch device, comprising:

Capacitive pen;

Capacitive touch panel,

And including a first electrode group and a second electrode group and a control processing unit that cross each other, the control processing unit controls one of the first electrode group and the second electrode group to transmit a measurement signal as a transmitting electrode, and control the first electrode Receiving, by the one of the group and the second electrode group, a signal sent by the capacitive pen as a receiving electrode;

The capacitive pen includes

Receiving, receiving the measurement signal sent by the capacitive touch panel;

a signal processing unit, generating a high voltage signal synchronized with the measurement signal according to the signal received by the receiving unit; and

a sending unit, sending the high voltage signal to the capacitive touch panel,

The control processing unit acquires information of the capacitive pen according to a signal received by the receiving electrode.

The touch device according to claim 13, wherein

The measurement signal sent by the transmitting electrode includes command information;

The signal processing unit of the capacitive pen parses the command information and responds.

The touch device according to claim 14, wherein the command information includes at least one of an inverted signal generation command, a capacitive pen information acquisition command, and a capacitive pen information transmission command, wherein The inverted signal generation command instructs the signal processing unit to generate an inverted high voltage signal;

The capacitive pen information acquisition command instructs the signal processing unit to acquire a tip pressure and/or a button information of the capacitive pen;

The capacitive pen information transmission command instructs the signal processing unit to transmit a signal including a tip pressure and/or button information of the capacitive pen.

The touch device according to claim 15, wherein the transmitting electrode transmits a measurement wave including an inverted signal generation command, and determines the according to the in-phase high-voltage signal and the inverted high-voltage signal generated by the signal processing unit. The position of the capacitive pen.

17. The touch device of claim 14, wherein the command information is modulated onto the measurement signal.