Power taking method and passive nfc device

Abstract

The application relates to the NFC technical field, in particular to a power taking method and a passive NFC device, wherein the power taking method comprises the following steps: receiving a plurality of instructions sent by an external NFC terminal according to a standard protocol to enter a card identification and basic information reading process, and converting electromagnetic carriers sent by the external NFC terminal in the process into electric energy; wherein at least one instruction in the plurality of instructions sent by the external NFC terminal is responded and controlled to prolong the duration of the identification and basic information reading process. In the application, at least one instruction in the plurality of instructions sent by the external NFC terminal in the card identification and basic information reading process is responded and controlled to prolong the duration of the process, then the duration of the carrier sent by the external NFC terminal is prolonged, more electric energy is obtained by converting the longer carriers, and the application scene of the passive device with long-time power supply demand is met.

Description

Technical Field

[0001] This application relates to the field of NFC technology, specifically to a power-generating method and a passive NFC device. Background Technology

[0002] Near Field Communication (NFC) is a short-range, high-frequency wireless communication technology that allows electronic devices to exchange data contactlessly over short distances. A typical NFC communication system includes an NFC terminal and a passive NFC device. The NFC terminal, as the initiator, generates a radio frequency field; the passive NFC device, as the recipient, is typically designed to be passive, its operating power entirely dependent on electromagnetic induction from the NFC terminal's radio frequency field.

[0003] In related technologies, the power acquisition and communication processes of passive NFC devices are coupled. Only after a successful communication connection is established will the NFC terminal enter a relatively stable and continuous data exchange phase according to instructions from the application layer (such as an app). At this time, the passive NFC device can obtain enough energy from the continuously existing carrier wave to perform subsequent operations such as reading, writing, and calculation. In other words, it cannot obtain enough energy to perform subsequent operations during the identification and reading of basic information before the app communication connection. Passive NFC devices must cooperate with a specific app to complete specific functions, which severely limits the application of NFC technology in instant response devices. Summary of the Invention

[0004] A power-drawing method is provided that, without the cooperation of an APP, can obtain sufficient continuous power during the extended NFC identification and reading of basic information process, thus meeting the needs of passive NFC application scenarios with long-term requirements.

[0005] Firstly, a power extraction method is provided, including: The system receives multiple instructions sent by an external NFC terminal to enter the process of identifying and reading basic information, and converts the carrier wave sent by the external NFC terminal obtained in the process of identifying and reading basic information into electrical energy. Specifically, at least one of the multiple commands sent by the external NFC terminal is responded to and controlled to extend the duration of the identification and reading of basic information process.

[0006] Optionally, responding to at least one of the multiple commands sent by the external NFC terminal includes: At least one of a plurality of instructions sent to an external NFC terminal is adjusted to respond by at least one of no response, error response, and insertion delay response request.

[0007] Optionally, responding to at least one of the multiple commands sent by the external NFC terminal includes: When it is determined that at least one of the multiple commands sent by the external NFC terminal will be retransmitted in response to the control, it will be used as a retransmission command; The external NFC terminal is cyclically and repeatedly sent the retransmission command in response to the retransmission command.

[0008] Optionally, the step of responding to the retransmission command and controlling it to cause the external NFC terminal to repeatedly send the retransmission command includes: The external NFC terminal may not respond to a retransmission command, causing it to send a retransmission command after a first preset time interval; and / or, An error response triggers a retransmission command, causing the external NFC terminal to send a retransmission command after a first preset time interval.

[0009] Optionally, the power extraction method further includes: Obtain the power extraction duration for converting the carrier wave sent by the external NFC terminal into electrical energy; When the power-drawing duration exceeds the second preset duration, the system correctly responds to the retransmission command so that the external NFC terminal can complete the process of identifying and reading basic information.

[0010] Optionally, responding to at least one of the multiple commands sent by the external NFC terminal includes: Determine that at least one of the multiple commands sent by the external NFC terminal is capable of accepting a delayed response request; Insert one or more delayed response requests to enable the external NFC terminal to maintain the carrier wave; The power consumption time of the carrier wave sent by the external NFC terminal is longer than the second preset time, and the instruction of the inserted delay response request is correctly responded to, so that the external NFC terminal can complete the process of identifying and reading basic information.

[0011] Optionally, the step of obtaining the power-drawing duration for converting the carrier wave sent by the external NFC terminal into electrical energy includes: Count the number of times the retransmission command of the external NFC terminal is sent; The power-drawing duration is calculated based on the number of times the retransmission command is sent and the first preset duration.

[0012] Optionally, the power extraction method further includes: Adjust the second preset duration based on the required power consumption.

[0013] Optionally, after the external NFC terminal completes the process of identifying and reading basic information, the power-drawing method further includes: Entering the transmission protocol stage with external NFC terminals; After the third preset time period, if there is no data interaction with the application of the external NFC terminal, it enters silent mode and thus cannot be recognized by the external NFC terminal.

[0014] Optionally, after entering silent mode, the power supply method further includes: When the power is depleted or the power is below a threshold, the system exits silent mode so that the external NFC terminal can be recognized.

[0015] In a second aspect, a passive NFC device is provided for performing the power-drawing method as described in the first aspect. The passive NFC device includes a memory and a display module. The memory is capable of storing multiple materials, and the display module is capable of displaying the materials. The passive NFC device is configured to: The system receives multiple instructions sent by an external NFC terminal to enter the process of identifying and reading basic information, and converts the carrier wave sent by the external NFC terminal obtained in the process of identifying and reading basic information into electrical energy. The electrical energy is used to power the display module, and the display module displays the material. Specifically, at least one of the multiple commands sent by the external NFC terminal is responded to and controlled to extend the identification process time.

[0016] Optionally, the passive NFC device is further configured to: After the display module displays one of the materials, every fourth preset time interval or during the next restart, the display module is controlled to switch to display the next material according to a preset switching method; The switching method includes one of random switching, cyclic switching, and sequential switching.

[0017] Optionally, the passive NFC device is further configured to: After the display module displays one of the aforementioned materials, it can be triggered to control the display module to switch to displaying the next of the aforementioned materials; and / or, It can change the switching method of the said material; and / or, The fourth preset duration can be modified; and / or, It can receive materials from the external NFC terminal and use those materials for the display module or to update the materials in the memory.

[0018] In the power-drawing method of this application embodiment, when receiving multiple instructions from an external NFC terminal to enter the identification and reading of basic information process, the duration of the process can be actively extended by responding to and controlling at least one of the multiple instructions sent by the external NFC terminal. Therefore, without the need for an APP, simply by extending the NFC identification and reading process, the passive NFC device can obtain sufficient (e.g., 1 minute or more) continuous power within that time period, thereby meeting its application requirements for long-term operation. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a flowchart illustrating the process of identifying and reading basic information provided in some embodiments of this application; Figure 2 This is a first flowchart of a power extraction method provided in some embodiments of this application.

[0021] Figure 3 This is a second flowchart of a power extraction method provided in some embodiments of this application.

[0022] Figure 4 This is a first communication timing diagram of a passive NFC device and an external NFC terminal provided in some embodiments of this application.

[0023] Figure 5 This is a second communication timing diagram of a passive NFC device and an external NFC terminal provided in some embodiments of this application.

[0024] Figure 6 This is a third communication timing diagram of a passive NFC device and an external NFC terminal provided in some embodiments of this application.

[0025] Figure 7 This is a fourth communication timing diagram of a passive NFC device and an external NFC terminal provided in some embodiments of this application.

[0026] Figure 8 This is the fifth communication timing diagram of a passive NFC device and an external NFC terminal provided in some embodiments of this application.

[0027] Figure 9 This is the sixth communication timing diagram of a passive NFC device and an external NFC terminal provided in some embodiments of this application. Detailed Implementation

[0028] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0029] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0030] "A and / or B" includes the following three combinations: A only, B only, and a combination of A and B.

[0031] The use of "applies to" or "configured to" in this application implies open and inclusive language, which does not preclude applicability to or configuration to devices performing additional tasks or steps. Furthermore, the use of "based on" implies openness and inclusivity, because processes, steps, calculations, or other actions "based on" one or more conditions or values ​​may in practice be based on additional conditions or values ​​beyond those conditions.

[0032] In this application, the term "exemplary" is used to mean "serving as an example, illustration, or description." Any embodiment described as "exemplary" in this application is not necessarily to be construed as being more preferred or advantageous than other embodiments. The following description is provided to enable any person skilled in the art to make and use this application. Details are set forth in the following description for purposes of explanation. It should be understood that those skilled in the art will recognize that this application can be made without using these specific details. In other instances, well-known structures and processes are not described in detail to avoid obscuring the description of this application with unnecessary detail. Therefore, this application is not intended to be limited to the embodiments shown, but is consistent with the broadest scope of the principles and features disclosed in this application.

[0033] Near Field Communication (NFC) is a short-range, high-frequency wireless communication technology that allows electronic devices to exchange data contactlessly over short distances. A typical NFC communication system includes NFC terminals (such as smartphones and card readers) and passive NFC devices (devices with passive NFC circuitry). The NFC terminal, as the initiator, generates a radio frequency field; the passive NFC device, as the recipient, is typically designed to be passive, its operating power entirely dependent on electromagnetic induction from the NFC terminal's radio frequency field.

[0034] In related technologies, the power acquisition and communication processes of passive NFC devices are coupled. Only after a successful communication connection is established will the NFC terminal enter a relatively stable and continuous data exchange phase according to instructions from the application layer (such as an app). At this time, the passive NFC device can obtain enough energy from the continuously existing carrier wave to perform subsequent operations such as reading, writing, and calculation. In other words, it cannot obtain enough energy to perform subsequent operations during the identification and reading of basic information before the app communication connection. Passive NFC devices must cooperate with a specific app to complete specific functions, which severely limits the application of NFC technology in instant response devices.

[0035] In view of this, the present application provides a power-gathering method that, when receiving multiple instructions sent by an external NFC terminal to enter the process of identifying and reading basic information, can respond to and regulate at least one of the multiple instructions sent by the external NFC terminal to extend the duration of the process of identifying and reading basic information, thereby extending the process of converting and obtaining power from the carrier wave sent by the external NFC terminal, so as to accumulate more power and meet the application scenarios with immediate needs.

[0036] For ease of understanding, the joint mechanism of this application will be further described below with reference to the accompanying drawings.

[0037] Firstly, a power supply method is provided; please combine with... Figure 1 It can be seen that this includes: It receives multiple instructions sent by an external NFC terminal to enter the process of identifying and reading basic information, and converts the carrier wave sent by the external NFC terminal in the process of identifying and reading basic information into electrical energy. Specifically, at least one of the multiple commands sent by the external NFC terminal is responded to and controlled to extend the duration of the identification and reading of basic information process.

[0038] In the power extraction method of this application embodiment, when entering the identification and reading of basic information process by receiving multiple instructions sent by an external NFC terminal, at least one of the multiple instructions sent by the external NFC terminal is responded to and regulated to extend the duration of the identification and reading of basic information process. Then, in the identification and reading of basic information process, the process of obtaining power by converting from the carrier wave sent by the external NFC terminal is extended to accumulate more power and meet the application scenarios with immediate needs.

[0039] For example, the normal process of identifying and reading basic information takes between 10ms and 15ms. In this application, the process is adjusted in response to at least one of a plurality of instructions sent by an external NFC terminal, so that the process of identifying and reading basic information can be extended to between 100ms and 60ms as needed, such as any one of 100ms, 500ms, 1s, 10s, 20s, 30s, 40s, 50s and 60s.

[0040] In some embodiments, responding to at least one of a plurality of commands sent by an external NFC terminal includes: At least one of a plurality of instructions sent to an external NFC terminal is adjusted to respond by at least one of no response, error response, and insertion delay response request.

[0041] By adjusting the response to at least one of the multiple commands sent to the external NFC terminal through at least one of the following: no response, erroneous response, and insertion of a delayed response request, the duration of the identification and reading of basic information is extended. Furthermore, during the identification and reading of basic information process, the process of obtaining power from the carrier wave sent by the external NFC terminal is extended to accumulate more power and meet the needs of application scenarios with immediate requirements.

[0042] In some embodiments, please combine with Figure 2 It is known that responding to at least one of the multiple commands sent by an external NFC terminal includes: S101, determine that at least one of the multiple instructions sent by the external NFC terminal is capable of accepting a delayed response request; S102, insert one or more delayed response requests to enable the external NFC terminal to maintain the carrier; S103, the power consumption time of the carrier wave sent by the external NFC terminal is longer than the second preset time, and the instruction of the inserted delay response request is correctly responded to, so that the external NFC terminal completes the process of identifying and reading basic information.

[0043] For example, the specific delay duration of the delayed response request can be designed according to the need to extend the duration of the basic information identification and reading process, as well as the maximum response duration of each instruction; for example, the duration of the delayed response request can be 60 seconds. The second preset duration can be obtained based on the duration and number of inserted delayed response requests.

[0044] In some embodiments, please combine Figure 3 It is known that responding to at least one of the multiple commands sent by an external NFC terminal includes: S201, determine that at least one of the multiple instructions sent by the external NFC terminal will be retransmitted when responding to the control, as a retransmission instruction; S202, respond to and control the retransmission command so that the external NFC terminal repeatedly sends the retransmission command in a loop.

[0045] When receiving multiple instructions from an external NFC terminal, the time for identifying and reading basic information can be extended by having the external NFC terminal repeatedly send retransmission instructions among the multiple instructions. Furthermore, during the process of identifying and reading basic information, the process of converting and obtaining power from the carrier wave sent by the external NFC terminal can be extended to accumulate more power and meet the needs of application scenarios with immediate requirements.

[0046] In some embodiments, responding to the retransmission command and controlling the external NFC terminal to repeatedly send the retransmission command includes: Do not respond to the retransmission command, so that the external NFC terminal sends a retransmission command after a first preset time interval; and / or, An error response triggers a retransmission command, causing the external NFC terminal to send a retransmission command after a first preset interval.

[0047] By not responding to retransmission commands and / or responding to retransmission commands with errors, the response to retransmission commands can be controlled. This causes the external NFC terminal to send retransmission commands after a first preset interval, effectively extending the time of the identification and reading of basic information. Furthermore, during the identification and reading of basic information, the process of obtaining power from the carrier wave sent by the external NFC terminal is extended to accumulate more power, meeting the needs of application scenarios with immediate requirements.

[0048] For example, the first preset duration can be set as needed, or it can be the interval duration when an external NFC terminal sends instructions under the standard protocol. This application does not limit this.

[0049] In some embodiments, the power extraction method further includes: S301, obtain the power draw duration for converting the carrier wave sent by the external NFC terminal into electrical energy; S302, when the power consumption time exceeds the second preset time, correctly respond to the retransmission command so that the external NFC terminal can complete the process of identification and reading basic information.

[0050] When the power extraction time exceeds the second preset time, the power obtained at this time can meet the application scenarios with immediate needs. By correctly responding to the retransmission command, the external NFC terminal stops sending retransmission commands in a loop, and finally completes the entire process of identification and reading basic information, and then can enter the data communication process.

[0051] For example, the second preset duration can be set according to specific needs, and this application does not limit it here.

[0052] In some embodiments, obtaining the power extraction duration for converting the carrier wave transmitted by the external NFC terminal into electrical energy includes: Count the number of times the retransmission command is sent by the external NFC terminal; The power-drawing duration is calculated based on the number of times the retransmission command is sent and the first preset duration.

[0053] The number of times the retransmission command is sent can be used to determine the number of times the retransmission command has been sent. The first preset duration can be used to determine the duration between adjacent retransmission commands. By combining the number of times the retransmission command is sent and the first preset duration, the increased duration can be obtained. Finally, the increased duration is added to the basic duration of the normal identification and reading process of the external NFC terminal to obtain the total power-drawing duration.

[0054] In some embodiments, the power extraction method further includes: Adjust the second preset duration based on the required power consumption.

[0055] The second preset duration can be adjusted as needed to meet the power requirements of different power consumption, so as to make the power consumption method more applicable.

[0056] In some embodiments, after the external NFC terminal completes the identification and reading of basic information process, the power-drawing method further includes: S401, enters the transmission protocol stage with the external NFC terminal; S402, after the third preset time, if there is no data interaction with the application of the external NFC terminal, it enters silent mode and thus cannot be recognized by the external NFC terminal.

[0057] For example, the third preset duration can be set according to specific needs, and this application does not limit it here.

[0058] In some embodiments, after entering silent mode, the power supply method further includes: S501 exits silent mode when power is depleted or the power level is below a threshold, so that external NFC terminals can recognize it.

[0059] For example, the threshold can be set as needed, and this application does not limit it.

[0060] For example, multiple ISO / IEC 14443-3 instructions sent by an external NFC terminal are received; wherein, the retransmission instruction is any one of the multiple ISO / IEC 14443-3 instructions sent by the external NFC terminal. During the transmission protocol phase, data exchange with the external NFC terminal specifically uses the ISO / IEC 14443-4 protocol.

[0061] Secondly, a method for displaying materials is also provided, applied to a passive NFC device. The passive NFC device includes a memory and a display module. The memory can store multiple materials, and the display module can display the materials. The method for displaying materials includes: It receives multiple instructions sent by an external NFC terminal to enter the process of identifying and reading basic information, and converts the carrier wave sent by the external NFC terminal in the process of identifying and reading basic information into electrical energy. The display module is powered by electrical energy, and the display module displays a material. Specifically, at least one of the multiple commands sent by the external NFC terminal is responded to and controlled to extend the time of the identification and reading of basic information process.

[0062] In the material display method of this application embodiment, when entering the identification and reading of basic information process by receiving multiple instructions sent by an external NFC terminal, at least one of the multiple instructions sent by the external NFC terminal is responded to and adjusted to prolong the duration of the identification and reading of basic information process. Furthermore, in the identification and reading of basic information process, the process of obtaining electrical energy from the carrier wave sent by the external NFC terminal is extended to accumulate more electrical energy to meet the power supply requirements of the display module, so that the display module can display the material.

[0063] For example, the materials include text and image data and video data, etc.

[0064] In some embodiments, after the display module displays a material, the material display method further includes: Every fourth preset time interval, the control display module switches to display the next material according to the preset switching method; The switching method includes one of the following: random switching, cyclic switching, and sequential switching.

[0065] The display module can switch to the next material according to a preset method, which makes the display module have a better display effect.

[0066] For example, each material has an index order that is sorted sequentially; random switching means switching materials randomly instead of sequentially according to the index order; cyclic switching means switching the same material cyclically; sequential switching means switching materials sequentially according to the index order.

[0067] In some embodiments, the passive NFC device further includes a control unit; After the display module displays a piece of material, the material display method also includes: In response to a trigger operation from the control unit, perform at least one of the following operations: Control the display module to switch to displaying the next material; Change the way materials are switched; Modify the fourth preset duration.

[0068] By controlling the display module to switch to the next material, users do not need to wait for the fourth preset time. They can directly control the passive NFC device to switch to the next material, enabling on-demand fast browsing and improving interaction efficiency and autonomy.

[0069] By changing the way the content is switched, the switching method can be selected selectively. Users can control the passive NFC device to select the corresponding switching method according to the characteristics of the content or personal preferences.

[0070] By modifying the fourth preset duration, precise control of the playback rhythm can be achieved. Users can control the passive NFC device to flexibly adjust the single display duration according to the importance or complexity of different materials, thereby ensuring the best effect of information transmission.

[0071] In some embodiments, after receiving multiple instructions sent by an external NFC terminal to enter the identification and reading of basic information process, and after converting the carrier wave obtained in the identification and reading of basic information process from the external NFC terminal into electrical energy, the material display method further includes: Enter the transmission protocol phase with an external NFC terminal to exchange data, and perform at least one of the following operations based on the data exchange with the external NFC terminal: Control the display module to switch to displaying the next material; Change the way materials are switched; Modify the fourth preset duration; It receives materials from external NFC terminals and stores the materials in the memory or uses them to update materials already stored in the memory.

[0072] By controlling the display module to switch to the next material, users do not need to wait for the fourth preset time. They can control the passive NFC device on an external NFC terminal to switch to the next material, enabling on-demand fast browsing and improving interaction efficiency and autonomy.

[0073] By changing the way the content is switched, the switching method can be selected selectively. Users can control the passive NFC device on an external NFC terminal to select the corresponding switching method according to the characteristics of the content or personal preferences.

[0074] By modifying the fourth preset duration, precise control of the playback rhythm can be achieved. Users can control passive NFC devices on external NFC terminals to flexibly adjust the single display duration based on the importance or complexity of different materials, thereby ensuring the best effect of information transmission.

[0075] Based on passive NFC devices, display materials can be received and updated at any time through external NFC terminals, thereby enabling their memory to conveniently store or update content according to user needs.

[0076] The fourth preset duration can be set according to specific needs, and this application does not limit it.

[0077] Thirdly, a passive NFC device is also provided for performing the power-drawing method as described in the first aspect. Please combine this with... Figures 4-9 As can be seen, a passive NFC device includes a memory and a display module. The memory can store multiple materials, and the display module can display the materials. The passive NFC device is configured as follows: It receives multiple instructions sent by an external NFC terminal to enter the process of identifying and reading basic information, and converts the carrier wave sent by the external NFC terminal in the process of identifying and reading basic information into electrical energy. The display module is powered by electrical energy, and the display module displays a material. Specifically, at least one of the multiple commands sent by the external NFC terminal is responded to and controlled to extend the identification process time.

[0078] In the passive NFC device of this application embodiment, when entering the identification and reading of basic information process by receiving multiple instructions sent by an external NFC terminal, at least one of the multiple instructions sent by the external NFC terminal is responded to and regulated to extend the duration of the identification and reading of basic information process. Furthermore, in the identification and reading of basic information process, the process of obtaining power from the carrier wave sent by the external NFC terminal is extended to accumulate more power and meet the application scenarios with immediate needs.

[0079] For example, the normal process of identifying and reading basic information takes between 10ms and 15ms. In this application, the process is adjusted in response to at least one of a plurality of instructions sent by an external NFC terminal, so that the process of identifying and reading basic information can be extended to between 100ms and 60ms as needed, such as any one of 100ms, 500ms, 1s, 10s, 20s, 30s, 40s, 50s and 60s.

[0080] In some embodiments, the passive NFC device also performs the material display method as described in the second aspect, and the passive NFC device is further configured to: After the display module displays a piece of material, every fourth preset time interval or the next time it is restarted, the display module is controlled to switch to display the next piece of material according to the preset switching method; The switching method includes one of the following: random switching, cyclic switching, and sequential switching.

[0081] In some embodiments, the passive NFC device is further configured to: After a display module displays one piece of material, it can be triggered to control the display module to switch to displaying the next piece of material; and / or, It can change the way materials are switched; and / or, Able to modify the fourth preset duration; and / or, It can receive materials from external NFC terminals and use those materials for display modules or to update materials in memory.

[0082] Fourthly, an NFC power generation system is also provided, including an NFC terminal and a passive NFC device as described in the third aspect. The passive NFC device is able to receive multiple instructions sent by an external NFC terminal to enter the process of identifying and reading basic information, and convert the carrier wave sent by the external NFC terminal obtained in the process of identifying and reading basic information into electrical energy. Among them, passive NFC devices can also respond to and regulate at least one of multiple commands to extend the duration of multiple commands sent by the NFC terminal.

[0083] In the NFC power-drawing system of this application embodiment, when the passive NFC device receives multiple instructions sent by the NFC terminal to enter the process of identifying and reading basic information, at least one of the multiple instructions sent by the NFC terminal is responded to and controlled to extend the duration of the process of identifying and reading basic information. Furthermore, in the process of identifying and reading basic information, by extending the process of the passive NFC device converting and obtaining power from the carrier wave sent by the NFC terminal, the passive NFC device can accumulate more power to meet the application scenarios with immediate needs.

[0084] For example, when an NFC terminal generates a carrier field, a passive NFC device entering the range of that magnetic field will begin to obtain energy through electromagnetic induction. This process is the basis for the operation of passive NFC devices, as they have no built-in power supply and rely entirely on obtaining the necessary power from the magnetic field generated by the NFC terminal. In short, once a passive NFC device enters the radio frequency field generated by an NFC terminal, it will immediately begin to draw power. This process precedes the reception of any instructions, enabling the device to be ready to wait for and process multiple instructions from the NFC terminal for the identification and reading of basic information. Furthermore, the power-drawing method of the first aspect and the related principles of the passive NFC device of the second aspect are the same as those described in the example above.

[0085] For example, the normal process of identifying and reading basic information takes between 10ms and 15ms. In this application, the process is adjusted in response to at least one of the multiple instructions sent by the NFC terminal, so that the time of identifying and reading basic information can be extended to between 100ms and 60ms as needed, such as 100ms.

[0086] For example, the NFC terminal of the first aspect, the external NFC terminal of the second aspect, and the NFC terminal of the third aspect are all mobile phones with integrated NFC circuits, or other terminal devices with integrated NFC circuits.

[0087] The main body used in the first aspect of the power-drawing method, the passive NFC device in the second aspect, and the passive NFC device in the third aspect are all mobile phone cases with passive NFC circuits, or other devices with passive NFC circuits; wherein, the passive NFC circuit includes communication circuits, power-drawing circuits, memory and display modules (such as e-ink screens or LED screens), etc.

[0088] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0089] The above provides a detailed description of a power-drawing method, a material display method, a passive NFC device, and an NFC power-drawing system provided by the embodiments of this application. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A method for obtaining power, characterized in that, include: The system receives multiple instructions sent by an external NFC terminal to enter the process of identifying and reading basic information, and converts the carrier wave sent by the external NFC terminal obtained in the process of identifying and reading basic information into electrical energy. Specifically, at least one of the multiple commands sent by the external NFC terminal is responded to and controlled to extend the duration of the identification and reading of basic information process.

2. The power extraction method according to claim 1, characterized in that, The response control to at least one of the multiple commands sent by the external NFC terminal includes: At least one of a plurality of instructions sent to an external NFC terminal is adjusted to respond by at least one of no response, error response, and insertion delay response request.

3. The power extraction method according to claim 1, characterized in that, The response control to at least one of the multiple commands sent by the external NFC terminal includes: When it is determined that at least one of the multiple commands sent by the external NFC terminal will be retransmitted in response to the control, it will be used as a retransmission command; The external NFC terminal is cyclically and repeatedly sent the retransmission command in response to the retransmission command.

4. The power extraction method according to claim 3, characterized in that, The step of responding to and controlling the retransmission command so that the external NFC terminal repeatedly sends the retransmission command includes: The external NFC terminal may not respond to a retransmission command, causing it to send a retransmission command after a first preset time interval; and / or, An error response triggers a retransmission command, causing the external NFC terminal to send a retransmission command after a first preset time interval.

5. The power extraction method according to claim 4, characterized in that, The power extraction method also includes: Obtain the power extraction duration for converting the carrier wave sent by the external NFC terminal into electrical energy; When the power-drawing duration exceeds the second preset duration, the system correctly responds to the retransmission command so that the external NFC terminal can complete the process of identifying and reading basic information.

6. The power extraction method according to claim 5, characterized in that, The process of obtaining the power extraction duration for converting the carrier wave sent by the external NFC terminal into electrical energy includes: Count the number of times the retransmission command of the external NFC terminal is sent; The power-drawing duration is calculated based on the number of times the retransmission command is sent and the first preset duration.

7. The power extraction method according to claim 1, characterized in that, The response control to at least one of the multiple commands sent by the external NFC terminal includes: Determine that at least one of the multiple commands sent by the external NFC terminal is capable of accepting a delayed response request; Insert one or more delayed response requests to enable the external NFC terminal to maintain the carrier wave; The power consumption time of the carrier wave sent by the external NFC terminal is longer than the second preset time, and the instruction of the inserted delay response request is correctly responded to, so that the external NFC terminal can complete the process of identifying and reading basic information.

8. The power extraction method according to claim 5 or 7, characterized in that, The power extraction method also includes: Adjust the second preset duration based on the required power consumption.

9. The power extraction method according to claim 5 or 7, characterized in that, After the external NFC terminal completes the process of identifying and reading basic information, the power-drawing method further includes: Entering the transmission protocol stage with external NFC terminals; After the third preset time period, if there is no data interaction with the application of the external NFC terminal, it enters silent mode and thus cannot be recognized by the external NFC terminal.

10. The power extraction method according to claim 9, characterized in that, After entering silent mode, the power supply method further includes: When the power is depleted or the power is below a threshold, the system exits silent mode so that the external NFC terminal can be recognized.

11. A passive NFC device, characterized in that, For performing the power-drawing method as described in any one of claims 1-10, the passive NFC device includes a memory and a display module, the memory being capable of storing multiple materials, and the display module being capable of displaying the materials, the passive NFC device being configured to: The system receives multiple instructions sent by an external NFC terminal to enter the process of identifying and reading basic information, and converts the carrier wave sent by the external NFC terminal obtained in the process of identifying and reading basic information into electrical energy. The electrical energy is used to power the display module, and the display module displays the material. Specifically, at least one of the multiple commands sent by the external NFC terminal is responded to and controlled to extend the identification process time.

12. The passive NFC device according to claim 11, characterized in that, The passive NFC device is also configured to: After the display module displays one of the materials, every fourth preset time interval or during the next restart, the display module is controlled to switch to display the next material according to a preset switching method; The switching method includes one of random switching, cyclic switching, and sequential switching.

13. The passive NFC device according to claim 12, characterized in that, The passive NFC device is also configured to: After the display module displays one of the aforementioned materials, it can be triggered to control the display module to switch to displaying the next of the aforementioned materials; and / or, It can change the switching method of the said material; and / or, The fourth preset duration can be modified; And / or, It can receive materials from the external NFC terminal and use those materials for the display module or to update the materials in the memory.

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