CN110929833B - Passive display smart card and display control method - Google Patents
Passive display smart card and display control method Download PDFInfo
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- CN110929833B CN110929833B CN202010095311.6A CN202010095311A CN110929833B CN 110929833 B CN110929833 B CN 110929833B CN 202010095311 A CN202010095311 A CN 202010095311A CN 110929833 B CN110929833 B CN 110929833B
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
- G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
- G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
- G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
- G06K19/077—Constructional details, e.g. mounting of circuits in the carrier
- G06K19/07701—Constructional details, e.g. mounting of circuits in the carrier the record carrier comprising an interface suitable for human interaction
- G06K19/07703—Constructional details, e.g. mounting of circuits in the carrier the record carrier comprising an interface suitable for human interaction the interface being visual
- G06K19/07707—Constructional details, e.g. mounting of circuits in the carrier the record carrier comprising an interface suitable for human interaction the interface being visual the visual interface being a display, e.g. LCD or electronic ink
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
- G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
- G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
- G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
- G06K19/0701—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips at least one of the integrated circuit chips comprising an arrangement for power management
- G06K19/0707—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips at least one of the integrated circuit chips comprising an arrangement for power management the arrangement being capable of collecting energy from external energy sources, e.g. thermocouples, vibration, electromagnetic radiation
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- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Electromagnetism (AREA)
- Credit Cards Or The Like (AREA)
Abstract
The invention provides a passive display smart card and a control method thereof, wherein the smart card comprises an induction circuit, a control circuit and a display screen, wherein the induction circuit is used for receiving external induction signals and converting the induction signals into a power supply, and the induction circuit transmits the power supply to the control circuit; when the control circuit detects that the data to be displayed is transmitted to the display screen, the control circuit controls the power supply to supply power to the display screen. The invention ensures that the power supply and the data are simultaneously transmitted to the electronic paper display screen, so that the display screen does not have the code messing problem.
Description
Technical Field
The invention relates to the technical field of computer display control, in particular to a passive display smart card and a display control method.
Background
Smart Card (Smart Card) refers to the generic term for plastic cards (usually the size of a credit Card) with a microchip embedded therein. Some smart cards contain a microelectronic chip and require data interaction via a reader/writer. The smart card is equipped with CPU, RAM and I/O, and can process a large amount of data without interfering the operation of the CPU of the host computer. The smart card may also filter out erroneous data to relieve the host CPU of the burden. The method is suitable for occasions with more ports and higher communication speed requirements. The integrated circuit in the card comprises a central processing unit CPU, a programmable read-only memory EEPROM, a random access memory RAM and a card Operating system COS (chip Operating system) solidified in the read-only memory ROM. The data in the card is divided into an external reading part and an internal processing part.
Electronic paper, also called digital paper. It is an ultra-thin and ultra-light display screen, i.e. a display which is thin, soft and erasable like paper. In the form of a thin film, the electronic paper is a layer of electrically charged material, which is "coated" onto the film, and is an electronic ink. This can also be seen as a thin embedded remote control display panel.
In the prior art, some smart cards have integrated electronic paper display screens for displaying transaction data, for example, the previously applied chinese patent 201610077803.6 can display transaction data on an electronic paper screen, but in practical use, there is a problem that if the transaction data is directly provided to the display screen after power is obtained by sensing, and when no transaction data is transmitted to the display screen, the display screen displays messy codes because no data level is available only with the power level.
Disclosure of Invention
The present invention provides the following technical solutions to overcome the above-mentioned drawbacks in the prior art.
A passive display smart card comprises a sensing circuit, a control circuit and a display screen, wherein the sensing circuit is used for receiving an external sensing signal and converting the sensing signal into a power supply, and the sensing circuit transmits the power supply to the control circuit; when the control circuit detects that the data to be displayed is transmitted to the display screen, the control circuit controls the power supply to supply power to the display screen.
Furthermore, the display screen is an electronic ink display screen, an electronic Paper display screen or a C-Paper display screen.
Furthermore, the intelligent card also comprises a radio frequency transmission circuit, the radio frequency transmission circuit is connected with the induction circuit and the control circuit, and when the radio frequency transmission circuit exchanges data with external equipment, the exchanged data is transmitted to the control circuit to be used as data to be displayed.
Furthermore, the control circuit determines that the radio frequency transmission circuit and the external device perform data exchange when detecting that the time for the radio frequency transmission circuit to be wirelessly connected with the external device exceeds a first threshold and the amount of the interactive data exceeds a second threshold.
Furthermore, the control circuit includes a first control chip and a second control chip, and when the control circuit detects that the data to be displayed is transmitted to the display screen, the control circuit controls the power supply to supply power to the display screen in one of the following manners:
when the first control chip detects that the data to be displayed is transmitted to the second control chip, the first control chip controls the power supply to supply power to the second control chip, and the second control chip simultaneously transmits the data to be displayed and the power supply to the display screen;
when the first control chip detects that the data to be displayed is transmitted to the second control chip, the second control chip controls the power supply to supply power to the display screen, and meanwhile, the second control chip transmits the data to be displayed to the display screen;
the second control chip is directly connected with the induction circuit, when the first control chip detects that the data to be displayed is transmitted to the second control chip, the second control chip controls the power supply to supply power to the display screen, and meanwhile, the second control chip transmits the data to be displayed to the display screen.
Further, the induction circuit comprises an induction coil and a plurality of capacitors, the induction coil converts energy obtained by induction signals into induction current, and the induction current is converted into power supply through the plurality of capacitors.
Furthermore, the radio frequency transmission circuit comprises an induction antenna and a processing chip, the processing chip performs data interaction with external equipment through the induction antenna, and the processing chip transmits the interactive data to the control circuit.
Furthermore, a detection circuit is arranged between the processing chip and the control circuit, the detection circuit is composed of 4 resistors which are connected in parallel and then connected to the control circuit, and the detection circuit is used for detecting whether the interactive data are transmitted to the control circuit.
Furthermore, the external device is a mobile phone, a card reader or a POS, and the data exchanged between the radio frequency transmission circuit and the external device is transaction data of the smart card during transaction.
The invention also provides a display control method using any one of the passive display smart cards, which comprises the following steps:
the sensing circuit converts the received external sensing signal into a power supply;
the control circuit detects whether to transmit data to be displayed to the display screen, if so, the control circuit controls the power supply to supply power to the display screen, and if not, the control circuit controls the power supply not to supply power to the display screen.
The invention has the technical effects that: the intelligent card comprises an induction circuit, a control circuit and a display screen, wherein the induction circuit is used for receiving an external induction signal and converting the induction signal into a power supply, and the induction circuit transmits the power supply to the control circuit; when the control circuit detects that the data to be displayed is transmitted to the display screen, the control circuit controls the power supply to supply power to the display screen. The invention ensures that the power supply and the data are simultaneously transmitted to the electronic paper display screen, so that the display screen does not have the code messing problem.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings.
FIG. 1 is a schematic diagram of a passive display smart card according to one of the embodiments of the present invention.
Fig. 2 is a schematic diagram of a passive display smart card according to one of the embodiments of the present invention.
Fig. 3 is a schematic diagram of a passive display smart card according to one of the embodiments of the present invention.
Fig. 4 is a schematic diagram of a passive display smart card according to one of the embodiments of the present invention.
Fig. 5 is a circuit diagram of a passive display smart card according to an embodiment of the present invention.
FIG. 6 is a display control method using the passive display smart card of the present invention according to an embodiment of the present invention
Detailed Description
The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not restrictive of the invention. It should be noted that, for convenience of description, only the portions related to the related invention are shown in the drawings.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
Fig. 1 shows a passive display smart card of the present invention, which comprises a sensing circuit, a control circuit and a display screen, wherein the sensing circuit is used for receiving external sensing signals and converting the sensing signals into power, and the sensing circuit transmits the power to the control circuit; when the control circuit detects that the data to be displayed is transmitted to the display screen, the control circuit controls the power supply to supply power to the display screen. Generally, the induction circuit at least includes an induction coil, and may further include a capacitor and an inductor, where the capacitor is used for boosting, the inductor is used for filtering, and the capacitor is used for converting an induced ac power into a dc power.
In one embodiment, the display screen is an electronic ink display screen, an electronic Paper display screen, or a C-Paper display screen. The display screens have the advantages of extremely low power consumption and suitability for being used as passive display screens, namely, the display screens can be driven by energy generated by the induction circuit.
Fig. 2 to 4 show other embodiments of the present invention, in which the control circuit includes a first control chip (i.e., a main control chip) and a second control chip (a display chip), and when the control circuit detects that data to be displayed is transmitted to the display screen, the control circuit controls the power supply to supply power to the display screen as follows.
In the embodiment shown in fig. 2, when the first control chip detects that the data to be displayed is transmitted to the second control chip, the first control chip controls the power supply to supply power to the second control chip, and the second control chip simultaneously transmits the data to be displayed and the power supply to the display screen. In the embodiment, the main control chip has a control function, the coil is powered on, and the main control chip does not supply power to the display screen, namely, when the main control chip transmits data to the display chip, the power is supplied to the display chip simultaneously, so that the problem that the display screen displays messy codes is solved. In the embodiment shown in fig. 2, the first and second control chips are connected via data lines and power lines, although the power lines may be multiplexed with the data lines, as shown in fig. 3.
In the schematic diagram shown in fig. 2, the second control chip can also be used to control the power supply to transmit to the display screen, i.e. the coil is powered on and the display chip does not supply power to the display screen, when the main control chip transmits data to the display chip, the display chip supplies power to the display screen, and it is ensured that messy codes do not appear. When the first control chip detects that the data to be displayed is transmitted to the second control chip, the second control chip controls the power supply to supply power to the display screen, and meanwhile, the second control chip transmits the data to be displayed to the display screen; in other words, the first control chip may not have the capability of controlling the power supply, and the technical problem of displaying the messy codes is solved.
Fig. 4 shows another embodiment, in which the second control chip is directly connected to the sensing circuit, and when the first control chip detects that data to be displayed is transmitted to the second control chip, the second control chip controls the power supply to supply power to the display screen, and simultaneously, the second control chip transmits the data to be displayed to the display screen. The display chip has increased control function promptly, and the display chip does not give the display screen power supply when the coil is gone up the electricity, and when main control chip gave display chip transmission data, display chip gave the display screen power supply, guarantees that the messy code can not appear.
In one embodiment, the smart card further comprises a radio frequency transmission circuit, the radio frequency transmission circuit is connected with the induction circuit and the control circuit, and when the radio frequency transmission circuit exchanges data with external equipment, the exchanged data is transmitted to the control circuit to be used as data to be displayed. The radio frequency transmission circuit comprises an induction antenna and a processing chip, the processing chip performs data interaction with external equipment through the induction antenna, and the processing chip transmits the interactive data to the control circuit. The external equipment is a mobile phone, a card reader or a POS, and the data exchanged between the radio frequency transmission circuit and the external equipment is transaction data when the smart card conducts transaction. The radio frequency transmission circuit may be a near field circuit, such as an NFC identification circuit. Of course, the smart card also includes other components such as a memory, which are conventional in the art and have been described in the background of the present invention, and will not be described in detail. The intelligent card can stably display transaction data on the display screen of the intelligent card without messy codes, and is convenient for the old, children and people with low eyesight to use, for example, when the intelligent card is used as a bank card, a user uses a self-service machine to inquire balance, the inquired balance data is returned to the intelligent card by external equipment, the intelligent card stably displays the balance data on an electronic screen, the check is convenient, or the self-service transaction is carried out, and the transaction amount can be stably displayed on the electronic screen, which is one of important invention points of the invention.
In one embodiment, in order to prevent the misoperation, it is necessary to determine whether there is a real transaction, and at this time, the control circuit determines that the rf transmission circuit and the external device perform data exchange when detecting that the time for the rf transmission circuit to be wirelessly connected with the external device exceeds a first threshold and the amount of the interactive data exceeds a second threshold. That is, it is determined whether the radio frequency transmission circuit establishes a stable wireless connection with an external device, the first threshold of the time may be several milliseconds, for example, 10ms, and after the establishment of the stable wireless connection is determined, it is determined whether effective data interaction is performed, that is, it is determined by the size of the data volume of the interaction, generally, the data volume of the interaction is more than several tens to several hundreds of bits, and a second threshold, for example, 128 bits, may be designed according to different application environments.
FIG. 5 shows a specific circuit diagram of the present invention, in which THD86 is a smart card chip for exchanging data with the outside and transmitting the exchanged data to DM130120D, and DM130120D is a display control chip for transmitting power and display data to an electronic paper display screen
The induction circuit comprises an induction coil and a plurality of capacitors (such as C2, C3 and C4 … … C12 in FIG. 5), the induction coil converts energy obtained through induction signals into induction current, the induction current is converted into a power supply through the capacitors, in the invention, the power supply required by the electronic paper display screen is 30V, the power supply converted from the capacitors into 30V is provided to the DM130120D, and when data to be displayed exist, the DM130120D transmits the 30V power supply and the data to be displayed to the electronic paper display screen (not shown in FIG. 5). The electronic paper display is connected to pins Y1-Y119 of DM 130120D.
Further, as shown in fig. 5, a detection circuit is disposed between the processing chip (THD 86) and the control circuit (DM 130120D), the detection circuit is composed of 4 resistors (R1, R2, R3, R4) connected to the control circuit after being connected in parallel, the detection circuit is used for detecting whether the interactive data is transmitted to the control circuit, and the control circuit (DM 130120D) determines whether the data to be displayed is transmitted through the level received by the relevant pin, which is another important invention point of the present invention.
As shown in fig. 6, a display control method using a passive display smart card of the present invention includes:
step S601, the sensing circuit converts the received external sensing signal into a power supply;
step S602, a control circuit detects whether to transmit data to be displayed to the display screen, if so, the control circuit controls the power supply to supply power to the display screen, and if not, the control circuit controls the power supply not to supply power to the display screen. The method can stably display the transaction data on the display screen of the intelligent card without messy codes.
For the different embodiments shown in fig. 2-4, i.e. by using a plurality of control chips, the step S602 may be modified adaptively.
For convenience of description, the above devices are described as being divided into various units by function, and are described separately. Of course, the functionality of the units may be implemented in one or more software and/or hardware when implementing the present application.
From the above description of the embodiments, it is clear to those skilled in the art that the present application can be implemented by software plus necessary general hardware platform. Based on such understanding, the technical solutions of the present application may be essentially or partially implemented in the form of a software product, which may be stored in a storage medium, such as a ROM/RAM, a magnetic disk, an optical disk, etc., and includes several instructions for enabling a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method according to the embodiments or some parts of the embodiments of the present application.
Finally, it should be noted that: although the present invention has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that: modifications and equivalents may be made thereto without departing from the spirit and scope of the invention and it is intended to cover in the claims the invention as defined in the appended claims.
Claims (9)
1. A passive display smart card is characterized by comprising a sensing circuit, a control circuit and a display screen, wherein the sensing circuit is used for receiving an external sensing signal and converting the sensing signal into a power supply, and the sensing circuit transmits the power supply to the control circuit; when the control circuit detects that the data to be displayed is transmitted to the display screen, the control circuit controls the power supply to supply power to the display screen; the control circuit comprises a first control chip and a second control chip, and when the control circuit detects that data to be displayed is transmitted to the display screen, the control circuit controls the power supply to supply power to the display screen in one of the following modes:
when the first control chip detects that the data to be displayed is transmitted to the second control chip, the first control chip controls the power supply to supply power to the second control chip, and the second control chip simultaneously transmits the data to be displayed and the power supply to the display screen;
when the first control chip detects that the data to be displayed is transmitted to the second control chip, the second control chip controls the power supply to supply power to the display screen, and meanwhile, the second control chip transmits the data to be displayed to the display screen;
the second control chip is directly connected with the induction circuit, when the first control chip detects that the data to be displayed is transmitted to the second control chip, the second control chip controls the power supply to supply power to the display screen, and meanwhile, the second control chip transmits the data to be displayed to the display screen.
2. The passive display smart card of claim 1, wherein the display screen is an electronic ink display screen, an electronic Paper display screen, or a C-Paper display screen.
3. The passive display smart card of claim 2, further comprising a radio frequency transmission circuit, wherein the radio frequency transmission circuit is connected to the sensing circuit and the control circuit, and when the radio frequency transmission circuit exchanges data with an external device, the radio frequency transmission circuit transmits the exchanged data to the control circuit as data to be displayed.
4. The passive display smart card of claim 3, wherein the control circuit determines that the radio frequency transmission circuit and the external device are exchanging data when detecting that the time for the radio frequency transmission circuit to be wirelessly connected with the external device exceeds a first threshold and the amount of data interacted with exceeds a second threshold.
5. The passive display smart card of any of claims 1-4, wherein the sensing circuit comprises a sensing coil and a plurality of capacitors, the sensing coil converting energy obtained by the sensing signal into an induced current, the induced current being converted into a power source by the plurality of capacitors.
6. The passive display smart card of claim 3, wherein the radio frequency transmission circuit comprises an induction antenna and a processing chip, the processing chip performs data interaction with an external device through the induction antenna, and the processing chip transmits the data interaction to the control circuit.
7. The passive display smart card of claim 6, wherein a detection circuit is disposed between the processing chip and the control circuit, the detection circuit is composed of 4 resistors connected in parallel to the control circuit, and the detection circuit is configured to detect whether the interactive data is transmitted to the control circuit.
8. The passive display smart card of claim 6, wherein the external device is a mobile phone, a card reader or a POS, and the data exchanged between the radio frequency transmission circuit and the external device is transaction data of the smart card during transaction.
9. A display control method using the passive display smart card of any of claims 1-8, the method comprising:
the sensing circuit converts the received external sensing signal into a power supply;
the control circuit detects whether to transmit data to be displayed to the display screen, if so, the control circuit controls the power supply to supply power to the display screen, and if not, the control circuit controls the power supply not to supply power to the display screen.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202632326U (en) * | 2011-12-12 | 2012-12-26 | 国民技术股份有限公司 | IC card with passive display function |
| CN103177228A (en) * | 2011-12-26 | 2013-06-26 | 国民技术股份有限公司 | Intelligent card and working method thereof |
| CN103971150A (en) * | 2013-02-05 | 2014-08-06 | 国民技术股份有限公司 | Intelligent card |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| TW201133349A (en) * | 2010-03-22 | 2011-10-01 | Univ Nat Taiwan | Smart card |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202632326U (en) * | 2011-12-12 | 2012-12-26 | 国民技术股份有限公司 | IC card with passive display function |
| CN103177228A (en) * | 2011-12-26 | 2013-06-26 | 国民技术股份有限公司 | Intelligent card and working method thereof |
| CN103971150A (en) * | 2013-02-05 | 2014-08-06 | 国民技术股份有限公司 | Intelligent card |
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