CN210836180U - NFC card with instruction function - Google Patents
NFC card with instruction function Download PDFInfo
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- CN210836180U CN210836180U CN201922420254.XU CN201922420254U CN210836180U CN 210836180 U CN210836180 U CN 210836180U CN 201922420254 U CN201922420254 U CN 201922420254U CN 210836180 U CN210836180 U CN 210836180U
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Abstract
An NFC card with an indication function comprises an NFC coupling coil power supply, an NFC card circuit and a first light-emitting circuit. And the NFC coupling coil power supply is used for generating induced current to supply power to the NFC card circuit and the first light-emitting circuit. The NFC card circuit is used for data interaction with reading equipment, and the first light-emitting circuit is used for emitting light when the NFC coupling coil power supply supplies power. Because the luminescence unit sets up on the surface of NFC card, the luminous state through the luminescence unit shows the reading state of NFC card, and then realizes the instruction function of NFC card.
Description
Technical Field
The application relates to the technical field of smart cards, in particular to an NFC card with an indication function.
Background
The smart card has wide application in our life, including identity cards, bank cards, transportation cards and the like, which belong to smart cards, and also include various membership cards, access control cards, shopping cards and the like. Although the shapes are different and the application fields are different, the core of the card is the microchip inside the card. Which are classified into a contact type and a non-contact type according to different chip protocols. The contact chip follows the ISO7816 protocol, and the contactless chip follows the ISO14443 protocol. The contact type card, such as a bank card, can be used only by inserting the bank card into a machine, while the non-contact type card, such as an identity card and a transportation card, can complete data reading and transmission only by placing the card in a sensing area, and the NFC technology is used. NFC, known collectively as Near field communication, is short-range wireless communication. The standard NFC communication frequency is 13.56MHz, the data transmission distance is generally within 10cm, the safety is high, and the following protocols are ISO14443A, ISO14443B and ISO 15693. In application, the NFC reader-writer sends specific electromagnetic waves to a carrier (such as a bus card) carrying an NFC chip, a series resonant circuit in the carrier has the same frequency as that sent by the reader-writer, and after receiving the electromagnetic waves of the reader-writer, the resonant circuit generates resonance to generate a power supply and provide working voltage for other circuits, so that the NFC reader-writer can complete data transmission and interaction with the carrier. The NFC card chip is a passive NFC chip, a battery is not needed, the data transmission speed is high and is 106kbit/s, data can be kept for 10 years and can be erased for tens of thousands of times, each device has a unique 4-byte serial number, 3-time authentication is needed, eavesdropping attack protection is achieved, a hierarchical key system is supported, and the application requirement of a multi-wallet function can be met. Because of the passive reading of the NFC card, and in the actual use process, the data interaction state of the NFC card cannot be reflected on the card body, and the use state of the NFC card cannot actively prompt the card holder, for example, the use state of the NFC card such as data interaction being prepared, data interaction being performed, or data interaction being completed cannot be known from the card body of the NFC card, and can only be known from the smart terminal device such as a card reader, which brings inconvenience to the safe use of the NFC card.
Disclosure of Invention
The main technical problem who solves of this application is that the NFC card does not have instruction function among the prior art, and the user can not follow the card body and learn the technical problem of NFC card user state.
According to a first aspect, an NFC card with an indication function comprises an NFC coupling coil power supply, an NFC card circuit, and a first light emitting circuit;
the NFC coupling coil power supply is used for generating induced current when the NFC card is read by reading equipment so as to provide power for the NFC card circuit and the first light-emitting circuit;
the NFC card circuit is connected with the NFC coupling coil power supply and used for data interaction with the reading equipment;
the first light emitting circuit comprises n light emitting units, wherein n is 1, 2 or an integer greater than 2; each light-emitting unit is respectively connected with the NFC coupling coil power supply and is used for emitting light when the NFC coupling coil power supply supplies power;
the light emitting unit is arranged on the surface of the NFC card.
Further, the NFC coupling coil power supply comprises a first power supply output end, a second power supply output end and a third power supply output end; the first power supply output end and the second power supply output end are connected with the NFC card circuit and used for providing power supply for the NFC card circuit; the first power output end and the third power output end are connected with the first light-emitting circuit and used for providing power for the first light-emitting circuit;
the NFC coupling coil power supply comprises an induction coil, a first capacitor C1, a second capacitor C2, a first diode D0 and a first resistor R0; two ends of the induction coil are respectively used as the first power supply output end and the second power supply output end of the NFC coupling coil power supply; the first capacitor C1 and the second capacitor C2 are respectively connected in series between the first power supply output end and the second power supply output end; the first diode D0 comprises a first connection end of a diode D0 and a second connection end of a diode D0, and the first resistor R0 comprises a first connection end of a resistor R0 and a second connection end of a resistor R0; the first connection end of the diode D0 is connected with the second power output end, the second connection end of the diode D0 is connected with the first connection end of the resistor R0, and the second connection end of the resistor R0 is used as a third power output end of the NFC coupling coil power supply.
Further, each of the light emitting cells includes a first light emitting diode D1 and a first light control resistor R1; the first light-emitting diode D1 and the first light-operated resistor R1 are connected in series, one end of the series connection is connected with the third power supply output end, and the other end of the series connection is connected with the first power supply output end; the first light-emitting diode D1 is used for emitting light, and the first light-operated resistor R1 is used for adjusting the light-emitting intensity of the first light-emitting diode D1.
Further, the LED lamp also comprises a light-emitting control circuit and a second light-emitting circuit; the NFC coupling coil power supply further comprises a fourth power output end, a second connection end of the diode D0 is used as a fourth power output end of the NFC coupling coil power supply, and the first power output end and the fourth power output end are respectively connected with the light-emitting control circuit and the second light-emitting circuit, and are used for providing power to the light-emitting control circuit and the second light-emitting circuit; the light-emitting control circuit is used for sending a light-emitting control signal to the second light-emitting circuit after acquiring the power supply; the second light emitting circuit emits light in response to the light emission control electric signal.
Further, the light emitting mode of the first light emitting circuit and/or the second light emitting circuit comprises brightness keeping and/or flickering; and/or the first and second light emitting circuits comprise light emitting elements comprising light emitting diodes, light emitting diode chips and/or chip scale packaged light emitting diodes; and/or the wavelength range of the light emitted by the light-emitting element is 380-780 nm; and/or the luminous intensity of the luminous element comprises 0.1cd, 0.2cd, 0.3cd, 0.5cd, 1cd, 2cd, 2.3cd, 2.5cd, 3cd, 4cd, 20cd, 30cd, 50cd and/or 100cd, 150cd, 200 cd.
Further, the second light emitting circuit includes p light emitting circuit groups, where p is 1, 2, or an integer greater than 2; each light-emitting circuit group is respectively connected with the NFC coupling coil power supply and the light-emitting control circuit and used for responding the light-emitting control electric signal to emit light.
Further, each of the light emitting circuit groups includes m controlled light emitting units, where m is 1, 2, or an integer greater than 2; each controlled light-emitting unit is respectively connected with the NFC coupling coil power supply and the light-emitting control circuit; the controlled light emitting unit is arranged on the surface of the NFC card.
Further, the light emission control circuit comprises a first control input terminal, a second control input terminal and p control output terminals; the first control input end and the second control input end are respectively connected with the first power supply output end and the fourth power supply output end and are used for obtaining a power supply; the p control output ends are respectively connected with the p light-emitting circuit groups of the second light-emitting circuit and used for respectively sending light-emitting control electric signals to the p light-emitting circuit groups.
Further, each of the controlled light emitting units includes a second light emitting diode D2 and a second light control resistor R2; the second light-emitting diode D2 and the second light-operated resistor R2 are connected in series, one end of the series connection is connected with the fourth power output end, and the other end of the series connection is connected with one control output end of the light-emitting control circuit; the second light emitting diode D2 is used for emitting light, and the second light control resistor R2 is used for adjusting the light emitting intensity of the second light emitting diode D2.
Further, the first light emitting diode D1 and the second light emitting diode D2 are configured to emit light in a positive direction and light in a side direction; and/or the light emitting colors of the first light emitting diode D1 and the second light emitting diode D2 include yellow, white, red, orange, green, cyan, blue, violet, green-blue, white-light-to-yellow, emerald green, and/or yellow-green.
Further, the luminous intensity of the first light emitting circuit and/or the second light emitting circuit includes 0.1cd, 0.2cd, 0.3cd, 0.5cd, 1cd, 2cd, 2.3cd, 2.5cd, 3cd, 4cd, 20cd, 30cd, 50cd and/or 100cd, 150cd, 200 cd.
According to the NFC card of the embodiment, the NFC card comprises an NFC coupling coil power supply, an NFC card circuit and a first light-emitting circuit. And the NFC coupling coil power supply is used for generating induced current to supply power to the NFC card circuit and the first light-emitting circuit. The NFC card circuit is used for data interaction with reading equipment, and the first light-emitting circuit is used for emitting light when the NFC coupling coil power supply supplies power. Because the luminescence unit sets up on the surface of NFC card, the luminous state through the luminescence unit shows the reading state of NFC card, and then realizes the instruction function of NFC card.
Drawings
Fig. 1 is a schematic circuit diagram of an NFC card with an indication function in an embodiment;
fig. 2 is a circuit diagram of an NFC card in an embodiment.
Detailed Description
The present invention will be described in further detail with reference to the following detailed description and accompanying drawings. Wherein like elements in different embodiments are numbered with like associated elements. In the following description, numerous details are set forth in order to provide a better understanding of the present application. However, those skilled in the art will readily recognize that some of the features may be omitted or replaced with other elements, materials, methods in different instances. In some instances, certain operations related to the present application have not been shown or described in detail in order to avoid obscuring the core of the present application from excessive description, and it is not necessary for those skilled in the art to describe these operations in detail, so that they may be fully understood from the description in the specification and the general knowledge in the art.
Furthermore, the features, operations, or characteristics described in the specification may be combined in any suitable manner to form various embodiments. Also, the various steps or actions in the method descriptions may be transposed or transposed in order, as will be apparent to one of ordinary skill in the art. Thus, the various sequences in the specification and drawings are for the purpose of describing certain embodiments only and are not intended to imply a required sequence unless otherwise indicated where such sequence must be followed.
The numbering of the components as such, e.g., "first", "second", etc., is used herein only to distinguish the objects as described, and does not have any sequential or technical meaning. The term "connected" and "coupled" when used in this application, unless otherwise indicated, includes both direct and indirect connections (couplings).
In the embodiment of the application, when the NFC card is close to a smart card terminal such as a card reader, the NFC card and the card reader generate alternating current due to electromagnetic coupling, and the alternating current is used as a power supply of the first light-emitting circuit, and the reading state of the NFC card is indicated through the light-emitting state of the light-emitting unit in the first light-emitting circuit, so that the indication function of the NFC card is realized.
Example one
Referring to fig. 1, a schematic circuit structure of an NFC card with an indication function in an embodiment includes an NFC coupling coil power supply 1, an NFC card circuit 2, and a first light emitting circuit 3. The NFC coupling coil power supply 1 is configured to generate an induced current when the NFC card is read by a reading device, so as to provide power to the NFC card circuit 2 and the first light-emitting circuit 3. And the NFC card circuit 2 is connected with the NFC coupling coil power supply 1 and is used for data interaction with reading equipment. The first light-emitting circuit 1 comprises n light-emitting units, wherein n is 1, 2 or an integer greater than 2, and each light-emitting unit is connected with the NFC coupling coil power supply 1 and is used for emitting light when the NFC coupling coil power supply 1 supplies power. Wherein each light emitting unit is arranged on the surface of the NFC card. In an embodiment, the NFC card further includes a light-emitting control circuit 4 and a second light-emitting circuit 5, the light-emitting control circuit 4 and the second light-emitting circuit 5 are respectively connected to the NFC coupling coil power supply 1, and the NFC coupling coil power supply 1 is further configured to provide power to the light-emitting control circuit 4 and the second light-emitting circuit 5. The light emitting control circuit 4 is used for sending a light emitting control electric signal to the second light emitting circuit 5 after acquiring the power supply, the second light emitting circuit 5 responds to the light emitting control electric signal to emit light, and the second light emitting circuit 5 is arranged on the surface of the NFC card. Wherein the first and second light emitting circuits comprise light emitting elements comprising light emitting diodes, light emitting diode chips and/or chip scale packaged light emitting diodes. In one embodiment, the wavelength range of the light emitted by the light emitting device is 380-780 nm. In one embodiment, the light emitting element has a light emitting intensity of 0.1cd, 0.2cd, 0.3cd, 0.5cd, 1cd, 2cd, 2.3cd, 2.5cd, 3cd, 4cd, 20cd, 30cd, 50cd, and/or 100cd, 150cd, 200 cd.
Referring to fig. 2, which is a schematic circuit diagram of an NFC card in an embodiment, an NFC coupling coil power supply 1 includes a first power output terminal, a second power output terminal, and a third power output terminal, where the first power output terminal and the second power output terminal are connected to the NFC card circuit 2 for providing power to the NFC card circuit 2, and the first power output terminal and the third power output terminal are connected to a first light-emitting circuit 3 for providing power to the first light-emitting circuit 3. The NFC coupler coil power supply 1 includes an induction coil ant, a first capacitor C1, a second capacitor C2, a first diode D0, and a first resistor R0. Two ends of the induction coil ant are respectively used as a first power output end and a second power output end of the NFC coupling coil power supply 1. The first capacitor C1 and the second capacitor C2 are connected in series between the first power supply output terminal and the second power supply output terminal, respectively. The first diode D0 includes a first connection end of a diode D0 and a second connection end of a diode D0, the first resistor R0 includes a first connection end of a resistor R0 and a second connection end of a resistor R0, the first connection end of a diode D0 is connected to the second power output end, the second connection end of the diode D0 is connected to the first connection end of the resistor R0, and the second connection end of the resistor R0 serves as the third power output end of the NFC coupling coil power supply 1. Each light emitting unit in the first light emitting circuit 3 includes a first light emitting diode D1 and a first light control resistor R1, that is, the first light emitting diode D1 is a light emitting device of the first light emitting circuit 3, the first light emitting diode D1 and the first light control resistor R1 are connected in series, one end of the series is connected to the third power output terminal, and the other end is connected to the first power output terminal, in an embodiment, the first light emitting circuit 3 is connected to the first power output terminal through a common virtual ground GND 0. The first light emitting diode D1 is used for emitting light, and the first light control resistor R1 is used for adjusting the light emitting intensity of the first light emitting diode D1. In an embodiment, the NFC coupler coil power supply further includes a fourth power output end, the second connection end of the diode D0 is used as the fourth power output end of the NFC coupler coil power supply 1, the first power output end and the fourth power output end are respectively connected to the light-emitting control circuit 4 and the second light-emitting circuit 5, and are configured to provide power to the light-emitting control circuit 4 and the second light-emitting circuit 5, the light-emitting control circuit 4 is configured to send a light-emitting control electrical signal to the second light-emitting circuit 5 after obtaining the power, and the second light-emitting circuit 5 emits light in response to the light-emitting control electrical signal. In one embodiment, the second light emitting circuit 5 is connected to the first power output terminal through the common virtual ground GND 0. In one embodiment, the light-emitting control circuit 4 is connected to the first power output terminal through the common virtual ground GND 0. The second light emitting circuit includes p light emitting circuit groups, where p is 1, 2, or an integer greater than 2. Each light emitting circuit group is respectively connected with the NFC coupling coil power supply 1 and the light emitting control circuit 4 and used for responding to the light emitting control electric signal to emit light. Each light emitting circuit group comprises m controlled light emitting units, wherein m is 1 or 2 or an integer larger than 2, each controlled light emitting unit is respectively connected with the NFC coupling coil power supply and the light emitting control circuit, and the controlled light emitting units are arranged on the surface of the NFC card. The lighting control circuit 4 comprises a first control input, a second control input and p control outputs. The first control input end and the second control input end are respectively connected with the first power output end and the fourth power output end and used for obtaining power. The p control output ends are respectively connected with the p light-emitting circuit groups in the second light-emitting circuit 5, and are used for respectively sending light-emitting control electric signals to the p light-emitting circuit groups. Each controlled light emitting unit in each light emitting circuit group comprises a second light emitting diode D2 and a second light control resistor R2, namely, the second light emitting diode D2 is a light emitting device of the second light emitting circuit 5, the second light emitting diode D2 and the second light control resistor R2 are connected in series, one end of the series connection is connected with the fourth power output end, and the other end of the series connection is connected with the control output end of one light emitting control circuit 4. The second light emitting diode D2 is used for emitting light, and the second light control resistor R2 is used for adjusting the light emitting intensity of the second light emitting diode D2. In one embodiment, the first led D1 and the second led D2 are configured to emit light in a front direction and a side direction. The light emitting colors of the first light emitting diode D1 and the second light emitting diode D2 include yellow, white, red, orange, green, cyan, blue, violet, green-blue, white-light to yellow, emerald green, and/or yellow-green, wherein the white light may further include positive white, warm white, cold white, and the like. In one embodiment, the light emitting modes of the first light emitting circuit and the second light emitting circuit comprise brightness keeping and/or flickering.
In the embodiment of the application, the NFC card includes an NFC coupling coil power supply, an NFC card circuit, and a first light emitting circuit. When the NFC card is close to smart card terminals such as a card reader, the NFC card and the card reader generate alternating current due to electromagnetic coupling, the alternating current is converted into direct current by using the principle that a diode is conducted in a directional mode, a power supply is provided for an NFC card circuit and a first light-emitting circuit, when the NFC card is read, the NFC coupling coil power supply supplies power, and the first light-emitting circuit emits light to achieve the indication function of the reading state of the NFC card. Further, the NFC card with the indication function further comprises a light-emitting control circuit and a second light-emitting circuit which are both powered by the NFC coupling coil power supply. After the NFC coupling coil power supply starts to supply power, the light-emitting control circuit controls the second light-emitting circuit to emit light according to a preset light-emitting mode. The second light emitting circuit may include a plurality of light emitting units, and the light emitting control circuit includes a master MCU controller, which may control the light emitting state, light emitting intensity and/or light emitting color of each controlled light emitting unit simultaneously or respectively in a preset manner, for example, different colors, different luminances and/or different layout structure patterns may be selected according to the application scene requirements of a specific NFC card product, where the colors may include blue, yellow, green and white, and the like, and the luminances may be 20cd, 50cd and/or 100cd, and the like. In one embodiment, the light emitting control circuit further includes a flicker frequency control resistor R3 for adjusting the flicker frequency of the second light emitting circuit by adjusting the resistance of the flicker frequency control resistor R3. In an embodiment, the first light emitting circuit is connected to the NFC card circuit, and the NFC card circuit is further configured to send a state display light emitting control signal to the first light emitting circuit, and the first light emitting circuit emits light in response to the state display light emitting control signal. In an embodiment, when data interaction is prepared and data interaction and/or data interaction is completed, the NFC card circuit sends a first state display light-emitting control signal, a second state display light-emitting control signal, and/or a third state display light-emitting control signal to the first light-emitting circuit, and the first light-emitting circuit responds to the first state display light-emitting control signal, the second state display light-emitting control signal, and the third state display light-emitting control signal to enter a first light-emitting state, a second light-emitting state, and a third light-emitting state. Wherein the first, second and third light emitting states comprise a light emitting state, a light emitting intensity and/or a light emitting color, respectively. The BOM material of NFC card in this application embodiment can adopt the wafer device, and PCBA thickness is steerable about 0.45mm, satisfies the material demand in the NFC card, provides the reliability guarantee for becoming card 0.8 +/-0.04 mm thickness.
The NFC card disclosed by the application is added with the first light-emitting circuit, the second light-emitting circuit and the light-emitting control circuit, and the non-contact induction power supply principle of the NFC card is utilized to generate voltage and current capable of meeting the normal work of the circuit, so that the light-emitting diodes of the first light-emitting circuit and the second light-emitting circuit actively prompt various light-emitting states, colors and the like in the transaction process of the NFC card. For example, the NFC card is preparing for a transaction prompt blinking state, and is in a transaction or transaction completion prompt blinking state. Still can install corresponding lamp decoration additional according to the image of NFC card surface, for example, when there is big dipper seven stars pattern or "70" pattern on NFC card surface, can install flashing light etc. additional in its suitable position. The card holder can know the transaction state of the NFC card in real time, and can show different pattern effects in the transaction process, so that the card holder is different from the existing smart card, and is stronger in science and technology sense.
The present application has been described with reference to specific examples, which are provided only to aid understanding of the present application and are not intended to limit the present application. For a person skilled in the art to which the application pertains, several simple deductions, modifications or substitutions may be made according to the idea of the application.
Claims (10)
1. An NFC card with an indication function is characterized by comprising an NFC coupling coil power supply, an NFC card circuit and a first light-emitting circuit;
the NFC coupling coil power supply is used for generating induced current when the NFC card is read by reading equipment so as to provide power for the NFC card circuit and the first light-emitting circuit;
the NFC card circuit is connected with the NFC coupling coil power supply and used for data interaction with the reading equipment;
the first light emitting circuit comprises n light emitting units, wherein n is 1, 2 or an integer greater than 2; each light-emitting unit is respectively connected with the NFC coupling coil power supply and is used for emitting light when the NFC coupling coil power supply supplies power;
the light emitting unit is arranged on the surface of the NFC card.
2. The NFC card of claim 1, wherein the NFC coupler coil power supply includes a first power output, a second power output, and a third power output; the first power supply output end and the second power supply output end are connected with the NFC card circuit and used for providing power supply for the NFC card circuit; the first power output end and the third power output end are connected with the first light-emitting circuit and used for providing power for the first light-emitting circuit;
the NFC coupling coil power supply comprises an induction coil, a first capacitor C1, a second capacitor C2, a first diode D0 and a first resistor R0; two ends of the induction coil are respectively used as the first power supply output end and the second power supply output end of the NFC coupling coil power supply; the first capacitor C1 and the second capacitor C2 are respectively connected in series between the first power supply output end and the second power supply output end; the first diode D0 comprises a first connection end of a diode D0 and a second connection end of a diode D0, and the first resistor R0 comprises a first connection end of a resistor R0 and a second connection end of a resistor R0; the first connection end of the diode D0 is connected with the second power output end, the second connection end of the diode D0 is connected with the first connection end of the resistor R0, and the second connection end of the resistor R0 is used as a third power output end of the NFC coupling coil power supply.
3. An NFC card according to claim 2, wherein each of said light emitting cells comprises a first light emitting diode D1 and a first light control resistor R1; the first light-emitting diode D1 and the first light-operated resistor R1 are connected in series, one end of the series connection is connected with the third power supply output end, and the other end of the series connection is connected with the first power supply output end; the first light-emitting diode D1 is used for emitting light, and the first light-operated resistor R1 is used for adjusting the light-emitting intensity of the first light-emitting diode D1.
4. The NFC card according to claim 2, further comprising a light emission control circuit and a second light emission circuit; the NFC coupling coil power supply further comprises a fourth power output end, a second connection end of the diode D0 is used as a fourth power output end of the NFC coupling coil power supply, and the first power output end and the fourth power output end are respectively connected with the light-emitting control circuit and the second light-emitting circuit, and are used for providing power to the light-emitting control circuit and the second light-emitting circuit; the light-emitting control circuit is used for sending a light-emitting control signal to the second light-emitting circuit after acquiring the power supply; the second light emitting circuit emits light in response to the light emission control electric signal.
5. The NFC card of claim 4, wherein the manner of illumination of the first and/or second light emitting circuits includes maintaining brightness and/or blinking; and/or the first and second light emitting circuits comprise light emitting elements comprising light emitting diodes, light emitting diode chips and/or chip scale packaged light emitting diodes; and/or the wavelength range of the light emitted by the light-emitting element is 380-780 nm; and/or the luminous intensity of the luminous element comprises 0.1cd, 0.2cd, 0.3cd, 0.5cd, 1cd, 2cd, 2.3cd, 2.5cd, 3cd, 4cd, 20cd, 30cd, 50cd and/or 100cd, 150cd, 200 cd.
6. The NFC card according to claim 1, wherein the second light emitting circuit comprises p light emitting circuit groups, where p is 1, 2, or an integer greater than 2; each light-emitting circuit group is respectively connected with the NFC coupling coil power supply and the light-emitting control circuit and used for responding the light-emitting control electric signal to emit light.
7. An NFC card according to claim 6, wherein each of the light emitting circuit groups comprises m controlled light emitting units, where m is 1, 2 or an integer greater than 2; each controlled light-emitting unit is respectively connected with the NFC coupling coil power supply and the light-emitting control circuit; the controlled light emitting unit is arranged on the surface of the NFC card.
8. An NFC card according to claim 7, wherein the light emission control circuit comprises a first control input, a second control input and p control outputs; the first control input end and the second control input end are respectively connected with the first power supply output end and the fourth power supply output end and are used for obtaining a power supply; the p control output ends are respectively connected with the p light-emitting circuit groups of the second light-emitting circuit and used for respectively sending light-emitting control electric signals to the p light-emitting circuit groups.
9. The NFC card according to claim 8, wherein each of the controlled light emitting units includes a second light emitting diode D2 and a second light control resistor R2; the second light-emitting diode D2 and the second light-operated resistor R2 are connected in series, one end of the series connection is connected with the fourth power output end, and the other end of the series connection is connected with one control output end of the light-emitting control circuit; the second light emitting diode D2 is used for emitting light, and the second light control resistor R2 is used for adjusting the light emitting intensity of the second light emitting diode D2.
10. The NFC card according to claim 9, wherein the first and second light emitting diodes D1 and D2 are structured to emit light in a positive direction and in a side direction; and/or the light emitting colors of the first light emitting diode D1 and the second light emitting diode D2 include yellow, white, red, orange, green, cyan, blue, violet, green-blue, white-light-to-yellow, emerald green, and/or yellow-green.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922420254.XU CN210836180U (en) | 2019-12-27 | 2019-12-27 | NFC card with instruction function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922420254.XU CN210836180U (en) | 2019-12-27 | 2019-12-27 | NFC card with instruction function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210836180U true CN210836180U (en) | 2020-06-23 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922420254.XU Active CN210836180U (en) | 2019-12-27 | 2019-12-27 | NFC card with instruction function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210836180U (en) |
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2019
- 2019-12-27 CN CN201922420254.XU patent/CN210836180U/en active Active
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