WO2022011788A1 - Smart pen - Google Patents

Abstract

A smart pen, which belongs to the technical field of smart pens. The smart pen comprises: a first pressure switch, the first pressure switch being arranged at the tail end portion of the smart pen, and the first pressure switch being able to execute a switching-on/off operation in a reciprocating manner; a second pressure switch, the second pressure switch being arranged at the tail portion of a pen core of the smart pen and being used for generating a trigger signal after the second pressure switch is in a switched-on state due to the pressure of a pen tip when same is being used to write on writing paper; and a processor, the processor determining, after receiving the trigger signal generated by the second pressure switch, whether the first pressure switch is in a closed state, and if so, controlling an infrared transceiver circuit on the smart pen to emit an infrared light signal to a writing paper area of the smart pen, and further determining a writing trace of the smart pen on the writing paper by means of reading a reflected signal of infrared light. A trajectory collection operation can be performed on the basis of a smart pen.

Description

smart pen technical field

The present invention relates to the technical field of smart pens, in particular to a smart pen.

Background technique

Writing is a wonderful experience. Writing on paper always has a charm. Even in the information age, people are always eager to save handwritten notes. Especially in the field of smart education, when electromagnetic writing recognition, infrared dot matrix recognition, ultrasonic recognition and other black technologies are integrated into writing, there are all kinds of smart writing pens.

In the prior art, since there are many components in the smart pen, the overall volume of the smart pen is relatively large due to the unreasonable structural layout of the smart pen during the use of the smart pen, and at the same time, the various components cannot be effectively unified and cooperated. Affect the user's experience of using the smart pen.

Therefore, there is an urgent need for a new smart pen solution with simple structure, easy maintenance and high work efficiency.

SUMMARY OF THE INVENTION

In view of this, an embodiment of the present invention provides a smart pen, which is used to provide a smart pen solution with a simple structure, easy maintenance and high work efficiency by means of a hardware structure and a combination of hardware structures. The smart pen includes:

a first pressure switch, the first pressure switch is arranged with the end portion of the smart pen, and the first pressure switch can perform a switch operation in a reciprocating cycle;

a second pressure switch, the second pressure switch is disposed at the end of the refill of the smart pen, and is used to generate a trigger signal when the pressure of the pen tip writing on the writing paper makes the second pressure switch in an on state;

A processor, after receiving the trigger signal generated by the second pressure switch, the processor determines whether the first pressure switch is in a closed state, and if so, controls the infrared transceiver circuit on the smart pen to send the signal to the The writing paper area of the smart pen emits infrared light signals, and by reading the reflected signals of the infrared light, the writing marks of the smart pen on the writing paper are further determined.

According to a specific implementation manner of the embodiment of the present disclosure, the smart pen further includes:

A camera acquisition module, after the infrared transceiver circuit emits infrared light signals, the camera acquisition module collects the trajectory formed by the pen tip in the writing area to form trajectory information, and the processor uses a preset data processing algorithm to The track information is subjected to data conversion processing to form a track digital signal;

a memory, the memory is used for storing the track digital signal formed by the processor;

A Bluetooth module, after the smart pen is successfully connected to the target terminal for communication, the Bluetooth module sends the trajectory digital signal stored in the memory to the target terminal.

According to a specific implementation manner of the embodiment of the present disclosure, the smart pen further includes:

A power management circuit, which is used to supply power to the second pressure switch, the infrared transceiver circuit, the camera acquisition module, the processor, the memory, and the Bluetooth module, respectively.

According to a specific implementation manner of the embodiment of the present disclosure, the power management circuit includes:

a first port, the first port is used to provide a high-level power supply signal, and the first port is sequentially connected with the first resistor and the first inductor to form a high-level supply point;

a second port and a third port, the second port and the third port are used to provide a differential connection information channel;

a fourth port, the fourth port is for providing a ground connection signal, and the fourth port is connected to the ground through a second inductor.

According to a specific implementation of the embodiment of the present disclosure, the high-level power supply point is connected to the first end of the first capacitor and the second capacitor in parallel, and the second end of the first capacitor and the second capacitor connected to ground;

the second port is connected to the first end of the second resistor, and the second end of the second resistor forms a first differential signal connection point;

The third port is connected to the first end of the third resistor, and the second end of the third resistor forms a second differential signal connection point.

According to a specific implementation manner of the embodiment of the present disclosure, the first end of the first resistor is connected to the first end of the first electrostatic discharge diode, and the second end of the first electrostatic discharge diode is connected to the ground;

The first end of the second resistor is connected to the first end of the second electrostatic discharge diode, and the second end of the second electrostatic discharge diode is connected to the ground;

The first end of the third resistor is connected to the first end of the third electrostatic discharge diode, and the second end of the third electrostatic discharge diode is connected to the ground.

According to a specific implementation manner of the embodiment of the present disclosure, the first port, the second port, the third port, and the fourth port are arranged in parallel in the form of USB interfaces.

According to a specific implementation manner of the embodiment of the present disclosure, the Bluetooth module includes:

a fourth resistor, the first end of the fourth resistor is connected to the collector of the first switching transistor;

a bluetooth chip, the bluetooth chip includes a first bluetooth interface, a second bluetooth interface and a third bluetooth interface, and the first bluetooth interface is connected to the second end of the fourth resistor for receiving power signals;

a third capacitor and a fourth capacitor, the first ends of the third capacitor and the fourth capacitor are connected to the second end of the fourth resistor, and the second ends of the third capacitor and the fourth capacitor are connected to the ground;

A light-emitting diode, the first end of the light-emitting diode is connected with the second Bluetooth interface of the Bluetooth chip, the second end of the light-emitting diode is connected with the second processor interface a2 of the processor, and the second Bluetooth The interface and the second processor interface a2 are used for data transmission between the Bluetooth chip and the processor, and the light emitting diode displays the frequency of data transmission in the form of flashing lights.

According to a specific implementation of the embodiment of the present disclosure, the Bluetooth module further includes:

a third inductor, the first end of the third inductor is connected to the third Bluetooth interface of the Bluetooth chip;

a fifth capacitor, the first end of the fifth capacitor is connected to the second end of the third inductor;

a Bluetooth transmitting antenna, which is connected to the second end of the fifth capacitor;

A fourth inductor, the first end of the fourth inductor is connected to the second end of the third inductor, and the second end of the fourth inductor is connected to the ground.

According to a specific implementation of the embodiment of the present disclosure, the infrared transceiver circuit includes an infrared emission module and an infrared acquisition module;

The infrared emission module includes an infrared diode and a seventh resistor connected in series, the first end of the infrared diode is connected to the collector of the second switching transistor, and the second end of the infrared diode is connected to the first end of the seventh resistor. terminal is connected, and the second terminal of the seventh resistor is grounded;

The infrared acquisition module includes a fifth resistor, a sixth resistor, an infrared induction triode and a sixth capacitor;

The first end of the fifth resistor is connected to the collector of the switching transistor, and the second end of the fifth resistor is connected to the emitter of the infrared induction transistor;

The first end of the sixth resistor is connected to the second end of the fifth resistor, and the second end of the sixth resistor is connected to the base end of the infrared induction triode;

The first end of the sixth capacitor is connected to the base end of the infrared sensing triode, and the second end of the sixth capacitor is connected to the fourth interface of the processor.

The smart pen provided by the embodiment of the present invention includes a first pressure switch, the first pressure switch is arranged with the end portion of the smart pen, and the first pressure quick switch can perform a switching operation in a reciprocating cycle; the second pressure switch, The second pressure switch is arranged at the end of the refill of the smart pen, and is used for generating a trigger signal when the pressure of the pen tip writing on the writing paper makes the second pressure switch in an on state; the processor, the processing After receiving the trigger signal generated by the second pressure switch, the device determines whether the first pressure switch is in a closed state, and if so, controls the infrared transceiver circuit on the smart pen to send the signal to the writing paper area of the smart pen. The infrared light signal is emitted, and the writing trace of the smart pen on the writing paper is further determined by reading the reflected signal of the infrared light, and the input track can be effectively collected through the solution of the present invention.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings used in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without any creative effort.

FIG. 1 is a schematic structural diagram of a smart pen according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of another smart pen provided by an embodiment of the present invention;

3 is a schematic diagram of a circuit structure of a smart pen according to an embodiment of the present invention;

4 is a schematic structural diagram of a Bluetooth module of a smart pen according to an embodiment of the present invention;

5 is a schematic structural diagram of an infrared transceiver circuit of a smart pen according to an embodiment of the present invention;

FIG. 6 is a schematic structural diagram of a pressure sensing module of a smart pen according to an embodiment of the present invention.

detailed description

The embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

It should be understood that the described embodiments are only some, but not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

1-2, a smart pen includes a first pressure switch, a second pressure switch, an infrared transceiver circuit and a processor.

The first pressure switch can be set to a connected or disconnected state by pressing, the first pressure switch is arranged with the end portion of the smart pen, and the first pressure switch can perform a switch operation in a reciprocating cycle. In this way, when the user wants to use the smart pen to perform track writing, the state of the first pressure switch can be set to the state of electrical connection. Thus, before the trace is written, the first switch is set. As an approach, the first pressure switch can be formed by a push-type electrical switch.

The second pressure switch is used to detect the writing pressure in real time, and the second pressure switch is arranged at the end of the refill of the smart pen, and is used for the pressure when the pen tip writes on the writing paper to make the second pressure switch in an on state Then, a trigger signal is generated to indicate that the user has a track writing operation.

The processor may monitor the states of the first pressure switch and the second pressure switch, and after receiving the trigger signal generated by the second pressure switch, the processor determines whether the first pressure switch is in a closed state, and if so, then Control the infrared transceiver circuit on the smart pen to emit infrared light signals to the writing paper area of the smart pen, and further determine the writing of the smart pen on the writing paper by reading the reflected signal of the infrared light trace.

By arranging two pressure switches, it is possible to prevent the smart pen from erroneously monitoring the writing track due to the user accidentally touching the tip of the smart pen.

According to a specific implementation manner of the embodiment of the present disclosure, referring to FIG. 2 , the smart pen further includes:

a camera acquisition module, after the infrared transceiver circuit emits infrared light signals, the camera acquisition module collects the trajectory formed by the pen tip in the writing area to form trajectory information, and the processor uses a preset data processing algorithm, The track information is subjected to data conversion processing to form a track digital signal;

a memory, the memory is used for storing the track digital signal formed by the processor;

A Bluetooth module, after the smart pen is successfully connected to the target terminal for communication, the Bluetooth module sends the trajectory digital signal stored in the memory to the target terminal.

According to a specific implementation manner of the embodiment of the present disclosure, the smart pen further includes:

A power management circuit, which is used to supply power to the second pressure switch, the infrared transceiver circuit, the camera acquisition module, the processor, the memory, and the Bluetooth module, respectively.

According to a specific implementation manner of the embodiment of the present disclosure, referring to FIG. 3 , the power management circuit includes:

The first port J1, the first port J1 is used to provide a high-level power supply signal, and the first port J1 is sequentially connected to the first resistor R1 and the first inductor L1 to form a high-level supply point.

The second port J2 and the third port J3, the second port J2 and the third port J3 are used to provide a differential connection information channel, and through the differential signal, the smart pen can communicate with an external device.

The fourth port J4, the fourth port J4 provides a ground connection signal, and the fourth port J4 is connected to the ground through the second inductor L2.

According to a specific implementation of the embodiment of the present disclosure, the high-level power supply point is connected to the first ends of the first capacitor C1 and the second capacitor C2 in parallel, and the first capacitor C1 and the second capacitor C2 The second end is connected to ground;

the second port J2 is connected to the first end of the second resistor R2, and the second end of the second resistor R2 forms a first differential signal connection point;

The third port J3 is connected to the first end of the third resistor R3, and the second end of the third resistor R3 forms a second differential signal connection point.

According to a specific implementation of the embodiment of the present disclosure, the first end of the first resistor R1 is connected to the first end of the first electrostatic discharge diode D1, and the second end of the first electrostatic discharge diode D1 is connected to the ground ;

The first end of the second resistor R2 is connected to the first end of the second electrostatic discharge diode D2, and the second end of the second electrostatic discharge diode D2 is connected to the ground;

The first end of the third resistor R3 is connected to the first end of the third electrostatic discharge diode D3, and the second end of the third electrostatic discharge diode D3 is connected to the ground.

According to a specific implementation manner of the embodiment of the present disclosure, the first port J1, the second port J2, the third port J3, and the fourth port J4 are arranged in parallel in the form of USB interfaces.

The high-level connection point can be connected with the substation circuit, and through the substation circuit, the high-level power signal is converted into a driving voltage that can be used by other modules.

According to a specific implementation manner of the embodiment of the present disclosure, referring to FIG. 4 , the Bluetooth module includes:

The fourth resistor R4, the first end of the fourth resistor R4 is connected to the collector of the first switch transistor Q2, and the radio collector of the first switch transistor Q2 is connected to the driving voltage.

A bluetooth chip, the bluetooth chip includes a first bluetooth interface b1, a second bluetooth interface b2 and a third bluetooth interface b3, the first bluetooth interface b1 is connected to the second end of the fourth resistor R4 for receiving power The first bluetooth interface b1 is used to receive the driving voltage, the second bluetooth interface b2 is used to send and receive signals to the second interface a2 of the processor, and the third bluetooth interface b3 is used to send the bluetooth signal to the outside through the bluetooth antenna E1.

The third capacitor C3 and the fourth capacitor C4, the first ends of the third capacitor C3 and the fourth capacitor C4 are connected to the second end of the fourth resistor R4, the third capacitor C3 and the fourth capacitor C4 The second end is connected to ground;

A light-emitting diode D4, the first end of the light-emitting diode D4 is connected to the second Bluetooth interface b2 of the Bluetooth chip, and the second end of the light-emitting diode D4 is connected to the second processor interface a2 of the processor, so The second Bluetooth interface b2 and the second processor interface a2 are used for data transmission between the Bluetooth chip and the processor, and the light emitting diode D4 displays the frequency of data transmission in the form of flashing lights.

According to a specific implementation of the embodiment of the present disclosure, the Bluetooth module further includes:

a third inductor L3, the first end of the third inductor L3 is connected to the third Bluetooth interface b3 of the Bluetooth chip;

a fifth capacitor C5, the first end of the fifth capacitor C5 is connected to the second end of the third inductor L3;

a Bluetooth transmitting antenna E1, the Bluetooth transmitting antenna E1 is connected to the second end of the fifth capacitor C5;

The fourth inductor L4, the first end of the fourth inductor L4 is connected to the second end of the third inductor L3, and the second end of the fourth inductor L4 is connected to the ground.

According to a specific implementation manner of the embodiment of the present disclosure, referring to FIG. 5 , the infrared transceiver circuit includes an infrared emission module and an infrared acquisition module;

The infrared emission module includes an infrared diode D5 and a seventh resistor R7 connected in series, the first end of the infrared diode D5 is connected to the collector of the second switching transistor Q3, and the second end of the infrared diode D5 is connected to the first end of the infrared diode D5. The first end of the seventh resistor R7 is connected, and the second end of the seventh resistor R7 is grounded;

The infrared acquisition module includes a fifth resistor R5, a sixth resistor R6, an infrared sensing transistor Q3 and a sixth capacitor C6;

The first end of the fifth resistor R5 is connected to the collector of the switching transistor, and the second end of the fifth resistor R5 is connected to the emitter of the infrared induction transistor;

The first end of the sixth resistor R6 is connected to the second end of the fifth resistor R5, and the second end of the sixth resistor R6 is connected to the base end of the infrared sensing triode;

The first end of the sixth capacitor C6 is connected to the base end of the infrared sensing triode, and the second end of the sixth capacitor C6 is connected to the fourth interface of the processor.

Referring to FIG. 6 , the embodiment of the present disclosure further includes a first pressure switch and a second pressure switch, wherein the first pressure switch is directly connected to the fifth interface a5 of the processor, and the fifth interface a5 of the processor can monitor the first pressure switch in real time. The opening and closing state of a pressure switch. The second pressure switch is sequentially connected to the operational amplifier N, the ninth resistor R9 and the third switch triode Q4. Wherein, the inverting input terminal of the operational amplifier is connected to the base terminal of the third switching transistor, and is grounded through the eighth resistor R8.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation or a specific orientation. construction and operation, and therefore should not be construed as limiting the invention. Furthermore, the terms "first", "second", and "third" are used for descriptive purposes only and should not be construed to indicate or imply relative importance.

In the description of the present invention, it should be noted that the terms "installed", "connected" and "connected" should be understood in a broad sense, unless otherwise expressly specified and limited, for example, it may be a fixed connection or a detachable connection Connection, or integral connection; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art who is familiar with the technical scope disclosed by the present invention can easily think of changes or substitutions. All should be included within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Industrial Applicability

Through the solution of the present application, the track acquisition operation can be performed based on the smart pen.

Claims (10)

1. A smart pen, comprising:

   a first pressure switch, the first pressure switch is arranged with the end portion of the smart pen, and the first pressure switch can perform a switch operation in a reciprocating cycle;

   a second pressure switch, the second pressure switch is disposed at the end of the refill of the smart pen, and is used to generate a trigger signal when the pressure of the pen tip writing on the writing paper makes the second pressure switch in an on state;

   A processor, after receiving the trigger signal generated by the second pressure switch, the processor determines whether the first pressure switch is in a closed state, and if so, controls the infrared transceiver circuit on the smart pen to send the signal to the The writing paper area of the smart pen emits infrared light signals, and by reading the reflected signals of the infrared light, the writing marks of the smart pen on the writing paper are further determined.
2. The smart pen according to claim 1, wherein the smart pen further comprises:

   A camera acquisition module, after the infrared transceiver circuit emits infrared light signals, the camera acquisition module collects the trajectory formed by the pen tip in the writing area to form trajectory information, and the processor uses a preset data processing algorithm, The track information is subjected to data conversion processing to form a track digital signal;

   a memory, the memory is used for storing the track digital signal formed by the processor;

   A Bluetooth module, after the smart pen is successfully connected to the target terminal for communication, the Bluetooth module sends the trajectory digital signal stored in the memory to the target terminal.
3. The smart pen according to claim 2, wherein the smart pen further comprises:

   A power management circuit, which is used to supply power to the second pressure switch, the infrared transceiver circuit, the camera acquisition module, the processor, the memory, and the Bluetooth module, respectively.
4. The smart pen according to claim 3, wherein the power management circuit comprises:

   a first port, the first port is used to provide a high-level power supply signal, and the first port is sequentially connected with the first resistor and the first inductor to form a high-level supply point;

   a second port and a third port, the second port and the third port are used to provide a differential connection information channel;

   a fourth port, the fourth port is for providing a ground connection signal, and the fourth port is connected to the ground through a second inductor.
5. The smart pen according to claim 4, wherein:

   the high-level power supply point is connected to the first end of the first capacitor and the second capacitor in parallel, and the second end of the first capacitor and the second capacitor is connected to the ground;

   the second port is connected to the first end of the second resistor, and the second end of the second resistor forms a first differential signal connection point;

   The third port is connected to the first end of the third resistor, and the second end of the third resistor forms a second differential signal connection point.
6. The smart pen according to claim 5, wherein:

   The first end of the first resistor is connected to the first end of the first electrostatic discharge diode, and the second end of the first electrostatic discharge diode is connected to the ground;

   The first end of the second resistor is connected to the first end of the second electrostatic discharge diode, and the second end of the second electrostatic discharge diode is connected to the ground;

   The first end of the third resistor is connected to the first end of the third electrostatic discharge diode, and the second end of the third electrostatic discharge diode is connected to the ground.
7. The smart pen according to claim 6, wherein:

   The first port, the second port, the third port and the fourth port are arranged in parallel in the form of USB interfaces.
8. The smart pen according to claim 7, wherein the Bluetooth module comprises:

   a fourth resistor, the first end of the fourth resistor is connected to the collector of the first switching transistor;

   a bluetooth chip, the bluetooth chip includes a first bluetooth interface, a second bluetooth interface and a third bluetooth interface, and the first bluetooth interface is connected to the second end of the fourth resistor for receiving a power signal;

   a third capacitor and a fourth capacitor, the first ends of the third capacitor and the fourth capacitor are connected to the second end of the fourth resistor, and the second ends of the third capacitor and the fourth capacitor are connected to the ground;

   A light-emitting diode, the first end of the light-emitting diode is connected to the second Bluetooth interface of the Bluetooth chip, the second end of the light-emitting diode is connected to the second processor interface a2 of the processor, and the second Bluetooth The interface and the second processor interface a2 are used for data transmission between the Bluetooth chip and the processor, and the light emitting diodes display the frequency of data transmission in the form of flashing lights.
9. The smart pen according to claim 8, wherein the Bluetooth module further comprises:

   a third inductor, the first end of the third inductor is connected to the third Bluetooth interface of the Bluetooth chip;

   a fifth capacitor, the first end of the fifth capacitor is connected to the second end of the third inductor;

   a Bluetooth transmitting antenna, which is connected to the second end of the fifth capacitor;

   A fourth inductor, the first end of the fourth inductor is connected to the second end of the third inductor, and the second end of the fourth inductor is connected to the ground.
10. The smart pen according to claim 9, wherein:

    The infrared transceiver circuit includes an infrared emission module and an infrared acquisition module;

    The infrared emission module includes an infrared diode and a seventh resistor connected in series, the first end of the infrared diode is connected to the collector of the second switching transistor, and the second end of the infrared diode is connected to the first end of the seventh resistor. terminal is connected, and the second terminal of the seventh resistor is grounded;

    The infrared acquisition module includes a fifth resistor, a sixth resistor, an infrared induction triode and a sixth capacitor;

    The first end of the fifth resistor is connected to the collector of the switching transistor, and the second end of the fifth resistor is connected to the emitter of the infrared induction transistor;

    The first end of the sixth resistor is connected to the second end of the fifth resistor, and the second end of the sixth resistor is connected to the base end of the infrared induction triode;

    The first end of the sixth capacitor is connected to the base end of the infrared sensing triode, and the second end of the sixth capacitor is connected to the fourth interface of the processor.

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