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Visual card based on I2C protocol and information display method

A display method and technology of a video card, applied in the field of video card and information display of the video card, capable of solving problems such as reading SE transactions

Active Publication Date: 2018-07-24
HEBEI LVWANG INFOTECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the card cannot read the SE transaction completion after the transaction is processed and return the transaction completion logo to read the balance, that is, the information displayed on the card is not the latest information

Method used

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  • Visual card based on I2C protocol and information display method
  • Visual card based on I2C protocol and information display method
  • Visual card based on I2C protocol and information display method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] This embodiment provides a visual card, which is specifically a visual financial card, such as a bank card, bus card, meal card, access control card, etc., which has a balance display function.

[0043] refer to Figure 1-2 As shown, the video card 1 includes an NFC chip 11, a control module 12 and a display screen.

[0044] The NFC (Near Field Communication) chip 11 is used to communicate with the contactless card reader device 2 for reading and writing operations (such as writing the balance after the transaction is completed), and is also used to return a representation to the control module after the writing is completed Write completed flag;

[0045] The control module, specifically the MCU 12, is electrically connected with the NFC chip 11, and is used to pass the I 2 The C protocol sends an APDU instruction for reading information in the NFC chip 11 to the NFC chip 11, and is used to receive the latest information returned by the NFC chip 11, such as the balanc...

Embodiment 2

[0054] This embodiment provides a method for displaying information on a video card, including the following steps:

[0055] S101. The visual card enters the magnetic field range of the contactless card reading device, and the visual card establishes communication with the contactless card reading device;

[0056] S102. The contactless card reading device performs read and write operations on the NFC chip of the visual card;

[0057] S103. The NFC chip returns a flag to the control module after the writing is completed;

[0058] S104. The control module passes the I 2 The C protocol sends an APDU instruction for reading information in the NFC chip to the NFC chip;

[0059] S105. The NFC chip returns the latest information in the NFC chip to the control module in response to the APDU instruction;

[0060] S106. The control module receives the returned latest information and sends it to the display screen of the video card for display;

[0061] S107. The visible card leaves ...

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PUM

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Abstract

The invention discloses a visual card and an information display method. After information processing is completed, latest information is displayed. A visual card based on an I2C protocol comprises anNFC chip, a control module and a display screen. The NFC chip is used for communicating with a non-access card reading device so as to carry out reading and writing operations and returning a sign indicating the completion of writing to the control module after the writing is completed. The control module is electrically connected to the NFC chip and is used for sending an APDU command for reading information in the NFC chip to the NFC chip by using the I2C protocol after the sign is received, and receiving the latest information returned by the NFC chip. The display screen is electrically connected to the control module and is used for displaying the latest information read by the control module.

Description

technical field [0001] The invention relates to the communication field, in particular to a video card and an information display method of the video card. Background technique [0002] IC card, also known as integrated circuit card, is widely used in finance, telecommunications, transportation, security management and identification due to its portability and large storage capacity. In the prior art, in order to be able to display the information stored in the IC card, such as the amount in the card, user information, etc., a visible IC card (referred to as a visual card) has appeared. Taking the visual bank card as an example, a specific APDU (Application Protocol Data Unit) command is sent to the security chip of the visual bank card through a contactless card reader or POS machine to realize various functions, such as transaction and balance reading. When the SE (financial) security chip of the visible bank card completes the transaction, it will not return any informat...

Claims

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Application Information

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IPC IPC(8): G06K7/10H02J50/12
CPCH02J50/12G06K7/10158G06K7/10297
Inventor 沈金秋谢正华
Owner HEBEI LVWANG INFOTECH CO LTD
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