CN117892759A - Visual card and visual card power supply method - Google Patents
Visual card and visual card power supply method Download PDFInfo
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- CN117892759A CN117892759A CN202410104892.3A CN202410104892A CN117892759A CN 117892759 A CN117892759 A CN 117892759A CN 202410104892 A CN202410104892 A CN 202410104892A CN 117892759 A CN117892759 A CN 117892759A
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Classifications
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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
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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
- G06K19/073—Special arrangements for circuits, e.g. for protecting identification code in memory
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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
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Abstract
The present disclosure discloses a video card and a video card power supply method. The visual card includes: the display screen only displays information when power supply voltage exists in a power supply interface of the display screen, and the capacitor module is connected to the power supply interface of the display screen and used for storing electric energy and is configured to: and continuously discharging in a preset time period after the video card leaves the field to supply power to a power supply interface of the display screen. By the scheme provided by the embodiment of the disclosure, the successful screen cleaning of the visual card can be realized.
Description
Technical Field
The present disclosure relates generally to the field of electronic device technology. More particularly, the present disclosure relates to a video card and a video card power supply method.
Background
With the development of smart card technology, the visual card is receiving more and more attention, and the visual card can display transaction related information when carrying out transaction operation, thereby realizing timely knowledge of transaction information by a cardholder.
The common visual card is provided with an electronic ink screen, the electronic ink screen consists of two substrates, the electronic ink screen is coated with electronic ink consisting of countless tiny transparent particles, the particles are formed by sealing a plurality of black and white particles with positive and negative electricity in an internal liquid microcapsule, and the charged particles with different colors can move in different directions due to different applied electric fields, so that the effect of black or white is presented on the surface of the screen. Because only the pixel color change (charged particle movement) consumes power, the screen display picture can be kept after the power is turned off, and therefore, the power is saved. Based on this feature, the video card typically employs an electronic ink screen as the display element.
Disclosure of Invention
To ensure that the visual card is successfully cleared, the present disclosure proposes visual card schemes in several aspects.
In a first aspect, the present disclosure provides a visual card comprising: the display screen only displays information when power supply voltage exists in a power supply interface of the display screen, and the capacitor module is connected to the power supply interface of the display screen and used for storing electric energy and is configured to: and continuously discharging in a preset time period after the video card leaves the field to supply power to a power supply interface of the display screen.
In a second aspect, the present disclosure provides a visual card comprising: a display screen; and a peep-proof film disposed on the display screen for preventing peeping.
In a third aspect, the present disclosure provides a method of supplying power to a visual card, wherein the visual card comprises: a display screen and a capacitive module, the method comprising: in response to the visual card receiving the electromagnetic field of the terminal, obtaining electrical energy from the terminal and storing the electrical energy by using the capacitance module; and providing the display screen with electric energy required for retaining the display content for a preset time period by using the stored electric energy in response to the electromagnetic field of the video card leaving the terminal.
For any of the first to third aspects, in some embodiments, the display screen is an OLED screen or a liquid crystal screen.
For any of the first to third aspects, in some embodiments, the capacitive module is configured to at least: acquiring and storing electric energy from a terminal; and responding to the interruption or deficiency of the power supply of the visual card, and providing the power required for reserving the display content for a preset time period for the display screen by utilizing the stored power.
For any of the first to third aspects, in some embodiments, the preset time period is positively correlated with the capacitance magnitude of the capacitive module.
For any of the first to third aspects, in some embodiments, the visual card comprises a number of capacitive modules, and there are at least two capacitive modules of different capacitance sizes in the number of capacitive modules.
For any of the first to third aspects, in some embodiments, the capacitive module comprises: and a plurality of energy storage capacitors connected in parallel.
For any of the first to third aspects, in some embodiments, the visual card further comprises: the main control chip is connected with the display screen through a communication bus and used for controlling the display content of the display screen; a power take-off coil configured to: converting the sensed electromagnetic field signal into a voltage signal and outputting the voltage signal in response to receiving the electromagnetic field of the terminal; and the output end of the low-voltage-drop voltage stabilizer is respectively connected with the power supply interface of the main control chip, the power supply interface of the display screen and the capacitor module, and the input end of the low-voltage-drop voltage-regulator is connected with the power taking coil and used for adjusting the voltage signal output by the power taking coil and transmitting the adjusted voltage signal to the main control chip, the display screen and the capacitor module so as to supply power for the main control chip, the display screen and the capacitor module in the non-communication process of the video card and the terminal.
For any of the first to third aspects, in some embodiments, the visual card further comprises: the unidirectional conductive component comprises a positive electrode connected with the main control chip, and a negative electrode connected with the capacitor module.
For any of the first to third aspects, in some embodiments, a privacy film is provided on the display screen.
For any of the first to third aspects, in some embodiments, the visual card is configured to: after receiving a transaction instruction of a terminal, a main control chip of the visual card sends out a first type of operation instruction; the execution module of the visual card executes a first type of operation instruction corresponding to the transaction instruction, and before or after the main control chip sends the first type of operation instruction and before the reference power consumption peak time of the visual card in the process of executing the first type of operation instruction by the execution module, a current waiting time extension request is sent to the terminal; the method comprises the steps that a sending time interval between a current waiting time extension request and a previous waiting time extension request adjacent to the current waiting time extension request is smaller than a preset sending time interval of the waiting time extension request, and an interval between the sending time of the current waiting time extension request and a reference power consumption peak time of a visible card is smaller than the preset sending time interval; and/or in response to detecting that the visible card receives the electromagnetic field of the terminal, reducing the main frequency of the main control chip of the visible card before the display screen of the visible card executes the screen swiping instruction; and/or when the display screen executes the screen brushing instruction, the main control chip is in a dormant state.
With the visual card provided above, the visual card of the embodiments of the present disclosure can achieve successful screen cleaning. On the other hand, the visual card provided by the embodiment of the disclosure can display contents in real time by utilizing the display screen, so that information interaction between a cardholder and the card is realized. Because the display screen only displays information when the power supply voltage exists in the power supply interface, once the visual card is powered off, the display content on the display screen disappears, the display information is prevented from being displayed all the time before the next communication, and the risk of information leakage is reduced. In addition, by means of the electric energy stored by the capacitor module, the power can be continuously supplied to the display screen in a preset time period through the power supply interface after the visual card leaves the field, so that the display content can still remain the preset time period after the visual card leaves the field, the effect of slowly disappearing the display content is achieved, and the information safety and the interactivity are considered. Further, compared with the electronic ink screen which needs to be swiped through charged particle movement, the display screen in the visual card of the embodiment of the disclosure can rapidly finish swipe under the power supply voltage, so that the user operation is responded rapidly, and the real-time performance of interaction is provided.
Drawings
The above, as well as additional purposes, features, and advantages of exemplary embodiments of the present disclosure will become readily apparent from the following detailed description when read in conjunction with the accompanying drawings. Several embodiments of the present disclosure are illustrated by way of example, and not by way of limitation, in the figures of the accompanying drawings and in which like reference numerals refer to similar or corresponding parts and in which:
FIG. 1 illustrates an exemplary block diagram of a visual card of some embodiments of the present disclosure;
FIG. 2 illustrates an exemplary block diagram of the visual card of some embodiments of the present disclosure;
FIG. 3 illustrates an exemplary block diagram of a visual card of some embodiments of the present disclosure;
FIG. 4 illustrates an exemplary flow chart of a method of supplying power to a video card in accordance with some embodiments of the present disclosure;
FIG. 5 illustrates an exemplary flow chart of a method of supplying power to a video card in accordance with some embodiments of the present disclosure;
fig. 6 illustrates an exemplary flow chart of a method of visual card power consumption control in accordance with some embodiments of the present disclosure.
Detailed Description
The following description of the embodiments of the present disclosure will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the disclosure. Based on the embodiments in this disclosure, all other embodiments that may be made by those skilled in the art without the inventive effort are within the scope of the present disclosure.
It should be understood that the terms "comprises" and "comprising," when used in this specification and the claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It is also to be understood that the terminology used in the description of the present disclosure is for the purpose of describing particular embodiments only, and is not intended to be limiting of the disclosure. As used in the specification and claims of this disclosure, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should be further understood that the term "and/or" as used in the present disclosure and claims refers to any and all possible combinations of one or more of the associated listed items, and includes such combinations.
As used in this specification and the claims, the term "if" may be interpreted as "when..once" or "in response to a determination" or "in response to detection" depending on the context. Similarly, the phrase "if a determination" or "if a [ described condition or event ] is detected" may be interpreted in the context of meaning "upon determination" or "in response to determination" or "upon detection of a [ described condition or event ]" or "in response to detection of a [ described condition or event ]".
Specific embodiments of the present disclosure are described in detail below with reference to the accompanying drawings.
Because the screen display picture can be kept after the electronic ink screen is powered off, the information leakage of a cardholder is easy to be caused, and the information safety is difficult to be ensured. The inventors of the present disclosure have known a way to clear display content by powering an electronic ink screen of a visual card, however, the inventors of the present disclosure have noted in research that this way has a high risk of screen clearing failure, and in view of this, the present disclosure provides a visual card scheme that can reduce the risk of screen clearing failure of a visual card, so as to effectively protect information security of a cardholder.
The embodiment of the disclosure provides a visual card scheme, which comprises a display screen capable of displaying information only under the condition that a power supply voltage exists in a power supply interface of the visual card, and by means of the display characteristic that display content disappears after power failure of the display screen, successful screen clearing of the visual card is realized, so that information of a cardholder is protected from being leaked. In addition, a capacitor module connected with a power supply interface of the display screen is combined to provide power supply voltage with preset duration for the video card after leaving the field, so that certain information display time is ensured, a cardholder is ensured to have enough time to complete information reading, and user experience is improved. Compared with the mode with higher risk of screen clearing failure known by the inventor, the visual card scheme provided by the disclosure can ensure the success of screen clearing.
Fig. 1 illustrates an exemplary block diagram of a visual card 100 of some embodiments of the present disclosure, as shown in fig. 1, the visual card comprising: a display screen 10 and a capacitance module 20, wherein the display screen 10 displays information only when a power supply voltage exists in a power supply interface 101 (relative to the case that the power supply voltage is not acquired by the power supply interface 101 of the display screen 10), it can be understood that the display screen 10 can normally display content when the power supply voltage is acquired by the display screen 10 from the power supply interface 101; if the power supply voltage obtained from the power supply interface 101 is 0, that is, the display screen 10 cannot display content when the display screen 10 is powered off, the content displayed when the display screen is powered on also disappears when the power is turned off.
Illustratively, the video card of embodiments of the present disclosure may employ an OLED screen or a liquid crystal screen. The OLED is called Organic Light-Emitting Diode, and includes a plurality of Light Emitting units, each including an anode, a cathode, and an Organic Light Emitting material, which emits Light when a current is passed.
The Liquid crystal display is called Liquid CRYSTAL DISPLAY, LCD for short, and is configured by placing Liquid crystal in two parallel substrates, and changing the arrangement state of Liquid crystal molecules by voltage to display pixels with different depths, thereby forming an image.
Based on the display principle of the OLED screen and the liquid crystal screen described above, compared with an electronic ink screen, the display content can be changed by driving a charged particle moving party, and the OLED screen and the liquid crystal screen have the display characteristic that the display content disappears after power failure, so that quick screen cleaning can be realized to protect cardholder information from being leaked. In addition, compared with the mode that the risk of the screen clearing failure is higher, which is known by the inventor, the visual card scheme provided by the disclosure can ensure the success of screen clearing.
In addition, the OLED screen and the liquid crystal screen can update display contents in real time, information can be dynamically displayed in the interaction process, and compared with a static display mode of an electronic ink screen, the real-time performance is better, and better user experience can be provided.
In addition, the electronic ink screen is limited by the volume of the liquid microcapsule, and the display color is single. Compared with an electronic ink screen, the OLED screen and the liquid crystal screen can display high-contrast color images with more abundant colors, and can meet the requirements of more display modes and more display scenes.
Moreover, the OLED screen and the liquid crystal screen can also adjust display brightness and display content according to actual needs, so that the effect of reducing power consumption is achieved, and the power saving performance is considered on the basis of solving the problems of high risk of screen cleaning failure of the electronic ink screen, poor safety and the like.
It should be noted that the above description of the type of display screen is merely an example, and other display screens having the display characteristic of disappearing after power failure may be selected in other embodiments of the present disclosure.
In other embodiments of the present disclosure, a privacy film may also be disposed on the display screen in order to further enhance privacy preserving effects. The peep-proof film is a layer of semi-rigid film used for covering the display screen, and the peep-proof film adopts an ultra-fine shutter optical technology, so that the display view angle of the screen can be reduced, the display content of the screen is specially used for a user to read at the front view angle, and other people can only see a black-painted picture when peeping at the side view angle. By arranging the peep-proof film, the information security of a cardholder can be further improved.
It should be noted that the privacy film is applicable to not only the video card described in connection with fig. 1, but also other video cards such as those employing electronic ink screens. It will be appreciated that other embodiments of the present disclosure provide yet another visual card that includes a display screen with a privacy film disposed thereon.
In view of the fact that the display content of the display screen disappears when the display screen is powered off, and card information is inconvenient for a cardholder to read, the embodiment of the disclosure provides the capacitive module 20 in the video card, and the capacitive module 20 is connected to the power supply interface 101 of the display screen 10. In the disclosed embodiment, the capacitive module 20 is configured to store electrical energy and is configured to at least: the discharge is continued for a preset period of time after the video card leaves the field to supply power to the display screen 10.
It should be noted that, the embodiments of the present disclosure do not limit the interaction manner between the video card and the terminal, and the video card may be in contact communication or non-contact communication with the terminal. Taking non-contact communication as an example, the electromagnetic field received by the visual card by the terminal is called visual card entrance, and the visual card and the terminal establish communication at the moment; the electromagnetic field of the visual card leaving the terminal is referred to as the visual card leaving field, at which point the visual card is disconnected from the terminal.
When the video card is in the electromagnetic field of the terminal, the power supply voltage of the display screen can be taken from the electromagnetic field, that is, the video card can utilize the electromagnetic field of the terminal to supply power for the display screen, so that the display screen can update the display content to the content matched with the current background transaction information. Further, the capacitive module of the video card in the embodiments of the present disclosure may also draw power from the electromagnetic field of the terminal and store it.
After the video card leaves the electromagnetic field of the terminal, the display screen cannot acquire electricity from the electromagnetic field of the terminal, and at the moment, the electric energy stored by the capacitor module is released to the display screen and is provided for the display screen through a power supply interface of the display screen. And in a period of time when the capacitor module continuously discharges (namely, within a preset time period), the display content of the refreshed display screen is kept on the display screen of the video card.
Again taking contact communication as an example, the capacitive module 20 is continuously discharged to supply power to the display screen 10 for a preset period of time when the power supply of the video card is interrupted. That is, after the power supply of the video card is interrupted, the capacitor module 20 uses the stored power to supply the power required for retaining the display contents for a preset period of time to the display screen.
It should be further noted that the video card in this embodiment may be an active video card or a passive video card. For the passive video card, the electric energy is completely from the outside, such as an electromagnetic field under the condition of non-contact communication, when the passive video card leaves the field, the communication is disconnected, and meanwhile, the external power supply is stopped, and the main control chip and the display screen are powered off (power supply of the capacitor module is omitted). For the active visual card, because the internal power supply is arranged in the active visual card, after the power supply of the active visual card is interrupted, the display and the main control chip can be powered by the internal power supply, so that the display content on the display screen disappears by utilizing the capacitance module to power the display screen, and the controller of the visual card can actively cut off the power supply of the internal power supply to the display screen after the transaction is finished.
It should be further noted that the preset duration is positively related to the capacitance of the capacitor module, and the larger the capacitance of the capacitor module is, the more electric energy can be stored in the capacitor module, and the longer the duration of continuous discharge is. Therefore, in the production link of the visual card, a manufacturer can preset the retention time of the display content on the visual card according to the actual requirement, and then select the capacitor module with corresponding size according to the preset retention time.
In other embodiments, a multiple capacitive module design may be employed. Illustratively, fig. 2 shows an exemplary block diagram of a visual card 200 of some embodiments of the present disclosure, as shown in fig. 2, which may include: the display screen comprises a plurality of capacitor modules 20 and a plurality of module switches 30, wherein the number of the capacitor modules 20 is the same as that of the module switches 30, the capacitor modules 20 are respectively connected to a power supply interface of the display screen through one module switch 30, and at least two capacitor modules with different capacitor sizes exist in the capacitor modules.
For ease of understanding, a visual card including 3 capacitive modules 20 is taken as an example, and it is assumed that the 3 capacitive modules are a capacitive module a, a capacitive module b, and a capacitive module c, respectively. One ends of the 3 capacitor modules are respectively grounded, the other end of the capacitor module a is connected with one end of the module switch A, and the other end of the module switch A is connected to a power supply interface of the display screen. Similarly, the other end of the capacitor module B is connected with one end of the module switch B, the other end of the module switch B is connected to the power supply interface of the display screen, the other end of the capacitor module C is connected with one end of the module switch C, and the other end of the module switch C is connected to the power supply interface of the display screen.
When any one of the module switch A, the module switch B and the module switch C is closed, and the other two switches are opened, after the video card leaves the field, the display screen is continuously powered by the capacitor module connected with the closed module switch, and the retention time of the display content is related to the capacitance of the capacitor module.
Similarly, when any one of the module switch A, the module switch B and the module switch C is opened, and the other two switches are closed, after the visual card leaves the field, the capacitive module group formed by connecting the two capacitive modules in parallel continuously supplies power for the display screen, and at the moment, the retention time of the display content is related to the capacitance of the two capacitive modules in the capacitive module group.
Similarly, when the module switch A, the module switch B and the module switch C are all closed, after the visual card leaves the field, the capacitor module group formed by connecting the capacitor modules a, B and C in parallel continuously supplies power for the display screen, and the retention time of the display content is related to the capacitance of the three capacitor modules.
Based on the above, the capacitor modules a, b and c with different sizes are selected, and then the above arrangement and combination are combined to form a plurality of power supply schemes with reserved time length.
It should be noted that, in the embodiment, the capacitance sizes of all the capacitance modules 20 in the video card are not limited to be different, and at least two capacitance modules with different capacitance sizes may be present in the plurality of capacitance modules. For example, in some embodiments, a spare capacitor module may be provided for capacitor modules with different capacitor sizes, for example, a video card including 4 capacitor modules, where the capacitor sizes of 2 capacitor modules may be the same, and when one capacitor module fails, a module switch of another capacitor module with the same capacitor module may be closed for emergency use.
It should be further noted that in the video card shown in fig. 2, each capacitive module is controlled individually. In other embodiments, a single module switch 30 may be used to control multiple capacitive modules 20. Further, the number of capacitive modules 20 controlled by each module switch 30 may be the same or different.
It is to be understood that the foregoing description of the number of capacitive modules 20 controlled by the module switch 30 is merely an example of the present disclosure, and those skilled in the art may adjust the number of module switches and their controlled electrical modules 20 according to actual needs. The design of the capacitive modules and the module switches to which the present disclosure is applicable is not limited to the above-described manner.
Still further, in the embodiments described in connection with fig. 1 or 2, the capacitive module may be constituted by a single capacitor, or may comprise several energy storage capacitors connected in parallel. When the capacitors are connected in parallel, the total capacitance value is increased, so that a plurality of energy storage capacitors with smaller capacitors can be connected in parallel to form a capacitor module, and the capacitor module with large value is realized. By this means, a low cost, small capacitance can be used to realize a large capacitance module, thereby reducing the manufacturing cost of the video card.
In the foregoing embodiments, the present invention does not limit the communication manner between the video card and the terminal. The following embodiments will further describe the structure of a video card by taking the video card for contactless communication as an example.
Fig. 3 illustrates an exemplary block diagram of a visual card 300 of some embodiments of the present disclosure, as shown in fig. 3, the visual card further includes, in addition to the display screen 10 and the capacitive module 20: a main control chip 40 and an electricity taking coil 50. The main control chip 40 is connected with the display screen 10 through a communication bus, and sends a display instruction to the display screen through the communication bus so as to control the display content of the display screen. The power taking coil is used for inducing an electromagnetic field of the terminal and is configured to: in response to receiving the electromagnetic field of the terminal, the sensed electromagnetic field signal is converted into a voltage signal and output. The voltage signal can be output to the main control chip, the display screen and the capacitor module to maintain the electric energy required by the active chip to process the communication data, the electric energy required by the display screen to brush the screen and the energy for charging the capacitor module.
Further, the communication bus in this embodiment may be SPI (Serial Peripheral Interface) bus or I2C (inter-INTEGRATED CIRCUIT) bus, etc. The SPI bus is a synchronous serial bus, and consists of a serial clock, a serial data output and a serial data input, so that a plurality of SPI devices can be mutually connected. The SPI equipment for providing the serial clock is an SPI host or a master equipment, other equipment is an SPI slave or a slave equipment, and full duplex communication can be realized between the master equipment and the slave equipment. The I2C bus is then a two-wire serial bus that uses two wires to transfer information between the host and the peripheral, to communicate serially between the microcontroller and the external device, or to transfer data bi-directionally between the master and slave devices.
Further, the video card may further include a low dropout voltage regulator 60, whose output end is connected to the power supply interface of the main control chip 40, the power supply interface of the display screen 10, and the capacitor module, and whose input end is connected to the power take-off coil 50. The low voltage drop voltage stabilizer 60 is used for adjusting the voltage signal output by the power taking coil 50 to meet the power supply requirement of the main control chip 40 and the display screen 10, and transmitting the adjusted voltage signal to the main control chip 40, the display screen 10 and the capacitor module 20 to supply power to the main control chip 40, the display screen 10 and the capacitor module 20 in the non-communication process of the video card and the terminal.
Because the main control chip also has the power supply requirement, when the visual card leaves the field, the main control chip possibly takes electricity from the capacitance module so that the electric energy supplied to the display screen is insufficient. In order to ensure that the electric energy stored in the capacitor module is only supplied to the display screen and not taken by the main control chip, so that the display content cannot be kept for a preset period of time, as shown in fig. 3, some embodiments of the present disclosure further add a unidirectional conductive component 70, such as a diode, in the video card, wherein an anode of the unidirectional conductive component 70 is connected with the main control chip 40, and a cathode of the unidirectional conductive component 70 is connected with the capacitor module 20.
In connection with the exemplary block diagram of the video card shown in fig. 3, the anode of unidirectional conductive component 70 is connected to the power supply interface of main control chip 40 and the cathode of unidirectional conductive component 70 is connected to the non-ground terminal of capacitive module 20.
When the video card is in the electromagnetic field, the electricity taking coil induces a voltage signal, and the unidirectional conductive component is conducted when a forward voltage is applied between two poles of the unidirectional conductive component, so that the voltage signal can be transmitted to the capacitor module and the display screen from the electricity taking coil.
When the visible card leaves the electromagnetic field, the capacitor module discharges to generate another voltage signal with the opposite direction to the voltage signal, and the unidirectional conductive component is cut off. The voltage signal generated by discharging the capacitor module can still be transmitted to the display screen, but cannot be transmitted to the power supply interface of the main control chip due to the blocking of the unidirectional conductive component, so that the capacitor module only supplies power to the display screen. By introducing the unidirectional conductive component into the visual card, the retention time of the display content can be prevented from being influenced by the power taking of the main control chip, and the influence of the disappearance of the display content on the information reading of a cardholder is avoided.
Based on the visual card depicted in fig. 3, the present disclosure also provides a visual card power supply method. Fig. 4 illustrates an exemplary flow chart of a method 400 of supplying power to a video card in accordance with some embodiments of the present disclosure, as shown in fig. 4, in step S401, power is obtained from a terminal and stored using a capacitive module. In this embodiment, the video card communicates with the terminal in a contactless manner, including but not limited to a wireless communication manner based on a near field communication technology. For example, the video card can sense the electromagnetic field of the terminal through the built-in power taking coil, and at the same time, the video card can convert the sensed electromagnetic field signal into a voltage signal and transmit the voltage signal to the display screen and the capacitor module.
It should be noted that, the connection circuits of the capacitor module, the display screen and the power-taking coil in the video card have been described in detail in the foregoing embodiment with reference to fig. 3, and will not be described herein again.
In step S402, in response to the electromagnetic field of the video card leaving the terminal, the stored power is used to supply the power required to retain the display contents for a preset period of time to the display screen. In this step, as the video card leaves the electromagnetic field of the terminal, the process of taking out the electromagnetic induction of the electric coil is stopped, and no voltage signal is applied to the two ends of the capacitor module. Because the capacitor module stores a certain amount of electric energy in step S401, after the voltage signal applied by the electricity-taking coil disappears, the capacitor module releases the stored electric energy and provides the electric energy to the display screen through the line shown in fig. 3.
In view of the display characteristics that the display screen only displays information when the power supply interface has power supply voltage, the electric energy stored by the capacitor module provides electric energy support for the display screen to reserve display content, and provides convenience for a card holder to read information. When the electric energy stored in the capacitor module is released, the display screen is powered off, and the display content disappears, so that the privacy protection effect is achieved.
Further, the electric energy obtained from the terminal is not only used for charging the capacitor module, but also used for supplying power to the main control chip and the display screen. Therefore, after step S401, the power supply method shown in fig. 4 may further include: step S403, power is supplied to the main control chip by using the electric energy obtained from the terminal. The main control chip after power supply can control the display content of the display screen according to the interaction information with the terminal.
Similarly, the power supply method shown in fig. 4 may further include: step S404, power is supplied to the display screen by using the electric energy obtained from the terminal. When the video card is within the electromagnetic field of the terminal, the power required by the display screen to display the content is derived from the power obtained from the terminal. It should be noted that, the steps S402 to S404 may be performed synchronously.
Based on the embodiment shown in connection with fig. 3, the voltage signal of the electric energy obtained from the terminal may not meet the power supply requirement of the display screen and/or the main control chip, and therefore, the voltage signal is adjusted first and then is input to the power supply interface of the display screen and/or the main control chip.
Fig. 5 illustrates an exemplary flow chart of a method 500 of supplying power to a video card in accordance with some embodiments of the present disclosure, as shown in fig. 5, in response to the video card receiving an electromagnetic field of a terminal, a power take-off coil is utilized to convert the sensed electromagnetic field signal into a voltage signal to obtain power from the terminal in step S501.
In step S502, the voltage signal output by the power take-off coil is adjusted by the low dropout voltage regulator. The low-dropout voltage regulator is used for providing stable voltage, and can adjust an input voltage signal to output the voltage signal into a direct-current voltage signal meeting the requirement.
In step S503, the adjusted voltage signal is transmitted to the display screen, the energy storage element, and the capacitor module. In the step, the capacitor module is used for storing electric energy, and the electric energy obtained from the terminal is used for supplying power to the main control chip and the display screen.
According to the description of the display screen in connection with the embodiment of fig. 1, it can be known that the OLED screen and the liquid crystal screen can adjust the display brightness and the display content according to actual needs, that is, the video card of the embodiment can achieve the effect of reducing the power consumption by adjusting the display screen. Other devices in the visual card are expanded, and aiming at the main control chip, the effect of reducing power consumption can be achieved by executing the method shown in fig. 6.
Fig. 6 illustrates an exemplary flowchart of a method 600 for controlling power consumption of a video card according to some embodiments of the present disclosure, as shown in fig. 6, in step S601, in response to the video card receiving an electromagnetic field of a terminal, a main frequency of a main control chip is reduced before a screen swipe command is executed by a display screen. In this embodiment, whether the visible card receives the electromagnetic field of the terminal may be detected first, and in response to detecting that the visible card receives the electromagnetic field of the terminal, the visible card enters the terminal to complete the transaction with the terminal, and the main control chip sends a screen-swiping instruction related to the visible card to the display screen according to the transaction content, and before the display screen executes the screen-swiping instruction, the main control chip may reduce its own power consumption by reducing the main frequency.
Further, the method shown in fig. 6 may further include: step S602, when the display screen executes a screen brushing instruction, the main control chip is in a dormant state. When the display screen executes the screen brushing instruction, the main control chip temporarily enters a dormant state, so that unnecessary power consumption except the screen brushing instruction can be reduced as much as possible, and the effect of reducing the power consumption is achieved.
Further, after the main control chip enters the sleep mode, the main control chip can be awakened passively when the next transaction occurs, or a timer can be built in the main control chip, the timer is started when the main control chip enters the sleep state, and after the timer finishes timing, the main control chip is awakened actively.
In addition to the method for controlling power consumption of the video card described in any one of the foregoing embodiments, the video card provided by the present disclosure may further reduce power consumption by a method specifically including: after receiving the transaction instruction of the terminal, the main control chip of the visual card sends out a first type of operation instruction (such as a screen-swiping instruction), and the execution module (such as a display screen) of the visual card executes the first type of operation instruction corresponding to the transaction instruction. In the process, before or after the main control chip sends out the first type of operation instruction, and before the reference power consumption peak time of the visible card in the process of executing the first type of operation instruction by the execution module, a current waiting time extension request is sent to the terminal.
The sending time interval between the current waiting time extension request and the previous waiting time extension request adjacent to the current waiting time extension request is smaller than the preset sending time interval of the waiting time extension request, and the interval between the sending time of the current waiting time extension request and the reference power consumption peak time of the visible card is smaller than the preset sending time interval.
That is, the video card can adjust the sending time of the target latency extension request by sending the current latency extension request, so as to avoid the sending time of the target latency extension request coinciding with the reference power consumption peak time, thereby avoiding the power consumption of the video card from further breaking through the reference power consumption peak at the reference power consumption peak time due to the sending of the target latency extension request.
It should be noted that, the first type of operation instruction refers to an operation instruction that requires power consumption exceeding a power consumption threshold when executed. The visual card may also have a second type of operating instructions, distinct from the first type of operating instructions, wherein the second type of operating instructions require less power consumption than a power consumption threshold when executed. Because the power consumption of the second type of operation instruction is low, when the second type of operation instruction is executed, the method for controlling the power consumption of the video card described in any of the foregoing embodiments may be used, or the second type of operation instruction may be executed according to a conventional operation instruction execution method, for example, a latency extension request is issued to the terminal according to a preset issue time interval.
It should be further noted that, the foregoing describes a plurality of methods capable of reducing the power consumption of the video card, and in practical application, one or a combination of the methods may be adopted and applied to the video card described in any of the foregoing embodiments, so as to implement a low-power consumption video card scheme.
In summary, the embodiment of the disclosure provides a visual card, which can ensure the success of screen cleaning on one hand, so as to effectively protect the safety of information of a cardholder; on the other hand, the visual card provided by the disclosure can rapidly respond to user operation by utilizing the display screen, display contents in real time, and realize information interaction between a cardholder and the card; on the other hand, the electric energy stored by the capacitor module is utilized to continuously supply power to the display screen within a preset duration through the power supply interface after the visual card leaves the field, so that the effect of slowly disappearing the display content is realized, and the safety and the interactivity of information are considered.
Further, the video card provided in other embodiments of the present disclosure can flexibly adjust the capacitance of the capacitance module, so as to adjust the retention time of the display content on the display screen according to the actual requirement, so as to adapt to a plurality of different application scenarios.
Further, the visual card provided by other embodiments of the present disclosure can utilize the unidirectional conductive component to prevent the electric energy stored by the capacitor module from being transmitted to the main control chip, so as to ensure that the electric energy stored by the capacitor module is all used for supplying power to the display, thereby effectively ensuring the retention time of the display content and preventing the display content from disappearing too fast so as to influence the information interaction.
Some embodiments of the present disclosure further provide a video card, where a peep-proof film is disposed on a display screen, so that other people can be effectively prevented from peeping the display content from a side view, and risk of information leakage is reduced.
Some embodiments of the present disclosure further provide a method for supplying power to a display screen, a main control chip, and a capacitive module through an electromagnetic field of a terminal.
Some embodiments of the present disclosure further provide a method for controlling power consumption of a video card, which can reduce power consumption of the video card from a display screen and/or a main control chip level, so as to achieve an effect of saving power.
While various embodiments of the present disclosure have been shown and described herein, it will be obvious to those skilled in the art that such embodiments are provided by way of example only. Numerous modifications, changes, and substitutions will occur to those skilled in the art without departing from the spirit and scope of the present disclosure. It should be understood that various alternatives to the embodiments of the disclosure described herein may be employed in practicing the disclosure. The appended claims are intended to define the scope of the disclosure and are therefore to cover all equivalents or alternatives falling within the scope of these claims.
Claims (12)
1. A video card, comprising: a display screen (10) and a capacitive module (20), wherein the display screen (10) displays information only when a supply voltage is present at its supply interface, the capacitive module (20) being connected to the supply interface of the display screen for storing electrical energy and configured to: and continuously discharging in a preset time period after the visual card leaves the field so as to supply power to the power supply interface of the display screen.
2. The video card of claim 1, wherein the display screen (10) is an OLED screen or a liquid crystal screen.
3. The video card of claim 1, wherein the capacitive module (20) is configured at least to:
Acquiring and storing electrical energy from the terminal; and
And responding to the interruption or deficiency of the power supply of the visual card, and providing the power required for reserving the display content for a preset time period for the display screen by utilizing the stored power.
4. A visual card according to any one of claims 1-3, wherein the preset time period is positively correlated to the capacitance magnitude of the capacitive module (20).
5. A visual card according to any one of claims 1-3, characterized in that the visual card comprises several capacitive modules (20), and that there are at least two capacitive modules of different capacitive magnitudes among the several capacitive modules.
6. A visual card according to any one of claims 1-3, wherein the capacitive module (20) comprises: and a plurality of energy storage capacitors connected in parallel.
7. A visual card according to any one of claims 1-3, further comprising:
The main control chip (40) is connected with the display screen through a communication bus and is used for controlling the display content of the display screen;
an electrical coil (50) configured to: converting the sensed electromagnetic field signal into a voltage signal and outputting the voltage signal in response to receiving the electromagnetic field of the terminal; and
The output end of the low-voltage drop voltage stabilizer (60) is respectively connected with the power supply interface of the main control chip, the power supply interface of the display screen and the capacitor module, and the input end of the low-voltage drop voltage stabilizer is connected with the power taking coil and is used for adjusting voltage signals output by the power taking coil and transmitting the adjusted voltage signals to the main control chip, the display screen and the capacitor module so as to supply power for the main control chip, the display screen and the capacitor module in a non-communication process of the video card and the terminal.
8. The visual card of claim 7, further comprising: and the unidirectional conductive component (70) is characterized in that an anode of the unidirectional conductive component is connected with the main control chip, and a cathode of the unidirectional conductive component is connected with the capacitor module.
9. A visual card according to any one of claims 1-3 and 8, wherein a privacy film is provided on the display screen.
10. A visual card according to any one of claims 1-3 and 8, wherein the visual card is configured to:
after receiving a transaction instruction of a terminal, a main control chip of the visual card sends out a first type of operation instruction; and
The execution module of the visual card executes a first type of operating instructions corresponding to the transaction instructions,
Before or after the main control chip sends out the first type of operation instruction, and before the reference power consumption peak time of the visible card in the process of executing the first type of operation instruction by the execution module, sending out a current waiting time extension request to the terminal; the sending time interval between the current waiting time extension request and the previous waiting time extension request adjacent to the current waiting time extension request is smaller than the preset sending time interval of the waiting time extension request, and the interval between the sending time of the current waiting time extension request and the reference power consumption peak time of the visible card is smaller than the preset sending time interval;
And/or
In response to detecting that the visible card receives an electromagnetic field of a terminal, reducing the main frequency of a main control chip of the visible card before a screen swiping instruction is executed by a display screen of the visible card;
And/or
And when the display screen executes a screen brushing instruction, the main control chip is in a dormant state.
11. A video card, comprising:
a display screen; and
And the peep-proof film is arranged on the display screen and used for preventing peeping.
12. A method of supplying power to a video card, wherein the video card comprises: a display screen and a capacitive module, the method comprising:
Acquiring electric energy from the terminal and storing the electric energy by using the capacitor module in response to the receiving of the electromagnetic field of the terminal by the video card; and
And responding to the electromagnetic field of the video card leaving the terminal, and providing the electric energy required for reserving the display content for a preset time period for the display screen by utilizing the stored electric energy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410104892.3A CN117892759A (en) | 2024-01-24 | 2024-01-24 | Visual card and visual card power supply method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410104892.3A CN117892759A (en) | 2024-01-24 | 2024-01-24 | Visual card and visual card power supply method |
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| Publication Number | Publication Date |
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| CN117892759A true CN117892759A (en) | 2024-04-16 |
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| CN202410104892.3A Pending CN117892759A (en) | 2024-01-24 | 2024-01-24 | Visual card and visual card power supply method |
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| CN (1) | CN117892759A (en) |
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- 2024-01-24 CN CN202410104892.3A patent/CN117892759A/en active Pending
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