IC Card With Electrophoretic Display For Visual Information
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Solution Overview
Problem
Conventional IC cards cannot display or update information visually, causing inconvenience to users as they can only be read by machines via card readers.
Innovation Solution
An IC card equipped with an electro-phoretic display and a driving circuit, powered by a conductive pad, allowing for the visual display of information, along with a card reader system that provides power and updating information to the IC card for driving the display.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional IC card design is used, then the card structure remains simple and cost-effective, but users cannot visually recognize the information stored on the card
Solution Approach 1:
The patent combines the IC card with an electro-phoretic display module, merging the functional card with a visual display function. This allows users to directly view information on the card without needing a card reader, resolving the contradiction between user convenience and structural simplicity.
Solution Approach 2:
The IC card is transformed into a multi-functional device that not only stores data but also displays information visually. The electro-phoretic display enables the card to serve both as a data storage medium and a visual interface, improving ease of operation while maintaining reasonable device complexity.
2Loss of information
If an electro-phoretic display is added to the IC card, then users can visually recognize information, but the card requires additional power supply and control circuits
Solution Approach 1:
The driving circuit is integrated with the existing IC card controller, merging the display control functions with the card's existing processing unit. This reduces the need for separate control circuits and minimizes the increase in device complexity while enabling information display.
Solution Approach 2:
The electro-phoretic display is designed to be driven by the IC card's existing power and control resources. The display module utilizes the card's internal power management and data processing capabilities, allowing the system to serve itself without requiring extensive external support circuits.
3Productivity
If the IC card includes a driving circuit for the electro-phoretic display, then the display can be updated dynamically, but the card requires more power consumption
Solution Approach 1:
The electro-phoretic display uses periodic updating rather than continuous refresh. Information is updated only when data changes are detected by the driving circuit, reducing power consumption compared to continuous display refresh while maintaining dynamic update capability.
Solution Approach 2:
The display system changes its operational parameters based on update needs. The driving circuit adjusts the power and data transmission parameters to the electro-phoretic display only when information needs to be updated, optimizing energy usage while maintaining productivity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables users to visually recognize and update information stored on the IC card, enhancing user convenience and interaction with IC card systems.
Implementation Method 1
an electro-phoretic display located on the card body for displaying an information
Data Source
AI summary
An IC card includes: a card body; a conductive pad for receiving a power and an updating information; an electro-phoretic display located on the card body for displaying an information; and a driving circuit, coupled to the conductive pad and the electro-phoretic display, for receiving the power and the updating information from the conductive pad and driving the electro-phoretic display according to the updating information.