Smart Card Reader Power Management via Card Insertion Trigger
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Solution Overview
Problem
EMV-capable smart card readers face high power consumption issues, leading to frequent charging needs, especially in small and medium-sized businesses with infrequent transactions, as they require constant readiness for transactions without sufficient battery life.
Innovation Solution
Implementing a power-on mechanism that activates the reader device only upon card insertion, either manually or automatically, and powers down after data processing, reducing unnecessary power usage and extending battery life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the reader device is kept powered on for constant readiness, then transaction availability is improved, but power consumption increases and battery life decreases
Solution Approach 1:
The reader device alternates between active and sleep states, performing useful work only when needed (when a card is inserted). The device transitions from a continuous power-on state to a periodic operation mode where it activates upon card insertion and returns to sleep state after transaction completion, thereby reducing overall power consumption while maintaining transaction availability.
Solution Approach 2:
The reader device automatically activates itself in response to card insertion without requiring manual power-on by the user. The card insertion event triggers the power-on sequence automatically, and the device self-manages its power state transitions, eliminating the need for users to manually manage power consumption while ensuring readiness when needed.
2Quantity of substance
If a rechargeable battery is used to support EMV capability, then power capacity is improved, but device complexity and charging maintenance increase
Solution Approach 1:
By implementing periodic operation with sleep modes, the device reduces its average power consumption to such an extent that the energy capacity of a rechargeable battery becomes sufficient for extended periods between charges. This reduces the frequency of charging operations, thereby reducing the practical impact of device complexity and maintenance requirements.
Solution Approach 2:
The invention changes the power consumption parameters of the device by implementing low-power sleep states and activating full functionality only when needed. This parameter change (from continuous high power to periodic low power) allows the use of rechargeable batteries with limited capacity and acceptance of occasional charging maintenance while still supporting EMV capability.
3Productivity
If the reader device powers on in advance for transactions, then transaction readiness is improved, but unnecessary power consumption occurs during idle periods
Solution Approach 1:
The device eliminates continuous idle power consumption by transitioning to sleep mode during idle periods and activating only when a card is inserted. This periodic operation pattern ensures the device is ready for transactions when needed while avoiding energy loss during idle periods between transactions.
Solution Approach 2:
The device performs necessary power-on initialization and system startup only in advance of actual transaction needs (triggered by card insertion), rather than performing them continuously in advance. This preliminary action is executed only when required, eliminating wasteful pre-powering during extended idle periods while maintaining readiness for transactions.
Data Source
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AI summary
In exemplary embodiments, a reader device is powered on only when a card is inserted in the reader device, thereby reducing the amount of time the reader device is powered and consequently reducing the amount of power consumption by the reader device. In some embodiments, inserting the card causes power-on of the reader device, while in other embodiments, insertion of the card plus other criteria are required to power on the reader device (e.g., having the reader device connected to the host device, or operating a manual switch while the card is inserted in the reader device).