Display Card With Micro-Terminal Internal Interface
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Solution Overview
Problem
Existing display card with keyboard (DCK) architectures are limited in scalability and functionality due to restricted communication paths between components, requiring physical changes for new services and lacking direct access to chip information, which hampers the provision of advanced services like account balance reading and secure PIN verification.
Innovation Solution
A new DCK architecture featuring a micro-terminal that communicates directly with the chip via an internal interface, enabling the provision of various services such as account balance display, PIN verification, and contactless payment activation, using a reconfigurable processor and interception application for logical switching and filtering without altering electrical connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a new service is added to existing DCK architectures, then functionality is improved, but device complexity and manufacturing cost increase due to required physical changes
Solution Approach 1:
The patent implements a reconfigurable processor that can dynamically change its operational mode and communication routing based on the service being provided. The system transitions from static hardware configuration to dynamic software-based configuration, allowing the same physical device to adapt to different services (contactless payment, account balance inquiry, PIN verification) without physical modifications.
Solution Approach 2:
The patent creates a universal DCK architecture where a single device can perform multiple functions through software configuration. The reconfigurable processor and internal interface enable the device to serve as a payment terminal, information display device, authentication system, and more, eliminating the need for separate specialized hardware for each service.
2Adaptability or versatility
If direct access to chip information is enabled, then service functionality is improved, but security risks increase
Solution Approach 1:
The patent introduces an internal interface and reconfigurable processor as intermediaries between the user interface and the secure chip. This intermediary layer controls and filters access to chip information, allowing only authorized services to request specific data while maintaining the security boundaries of the chip. The system acts as a controlled mediator rather than providing direct unrestricted access.
Solution Approach 2:
The chip maintains autonomous control over its own security and data access. The reconfigurable processor must obtain proper authorization and follow security protocols initiated by the chip itself to access information. This self-service approach ensures that the chip's security mechanisms remain intact while enabling necessary service functionality.
3Reliability
If separate processors are used for chip and display control, then security is improved, but communication capability between components is limited
Solution Approach 1:
The patent merges the display control functionality with the chip processor through the reconfigurable processor and internal interface. Instead of completely separate processors with limited communication channels, the system combines control functions while maintaining security boundaries, allowing rich communication capability for service provision while preserving security through controlled access mechanisms.
Data Source
AI summary
A display card 301 with a user interface for providing one or more services. The card 301 comprises: an external interface 302, 303 for communication with a terminal external from the card 301; a Chip 401 comprising one or more servers for storing one or more applications, wherein the Chip 401 is arranged to communicate with the external interface 302, 303; a user interface 304, 305, 306 for interacting with a user of the card 301; a micro-terminal 402 for controlling the provision of one or more services, wherein the micro-terminal 402 is arranged to communicate with the user interface 304, 305, 306; and the Chip 401 and micro-terminal 402 are arranged to communicate with each other via an internal interface 403 of the Chip 401. Applications include payment cards and passes.