Electronic Card Power-Receiving Indication for Stable Authentication
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Solution Overview
Problem
Users of electronic cards with electronic function circuits face challenges in determining if sufficient power is being received wirelessly, leading to unstable operation of biometric authentication processes, causing user stress and potential authentication failures.
Innovation Solution
Incorporating a communication antenna, a receiving coil, a resonant capacitor, a rectifying and smoothing circuit, and a power control circuit with a display element to indicate the power receiving state, allowing users to stabilize power reception and ensure prompt, stable operation of the electronic function circuit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the electronic card operates by wirelessly receiving power from a reader, then the card can perform contactless operations, but the user cannot determine whether sufficient power is being received, leading to unstable operation
Solution Approach 1:
The patent implements a feedback mechanism by displaying power receiving state information to the user. The control unit monitors the power receiving status and controls a display unit to show whether power is being received and the authentication result, allowing users to adjust their actions based on this feedback to ensure stable operation.
Solution Approach 2:
The patent introduces an intermediary information display system that mediates between the power receiving process and the user. The display unit acts as an intermediary, translating internal power status into visible information that guides user behavior, thereby stabilizing the power receiving process without requiring physical contact.
2Device complexity
If no power receiving state indication is provided, then the device structure remains simple, but users experience stress and authentication failures due to inability to verify power status
Solution Approach 1:
The control unit monitors authentication results and power receiving status, then controls the display unit to provide feedback to users. This feedback mechanism increases authentication success rates by allowing users to verify proper operation without significantly increasing device complexity.
Solution Approach 2:
The display unit utilizes color changes or light emission to indicate different states (power receiving status and authentication results). This visual indication method provides reliable information to users while maintaining relatively simple device structure, as it uses standard display technologies.
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 easily verify and stabilize the power receiving state, ensuring the electronic function circuit operates appropriately and efficiently, reducing authentication failures and user stress.
Implementation Method 1
The receiving coil receives power from a magnetic field generated by a reader
Implementation Method 2
The communication antenna and the receiving coil share electromagnetic field energy that resonates at the frequency for the short-range wireless communication
Data Source
AI summary
An electronic card with electronic function circuit includes a communication antenna for short-range wireless communication, a wireless communication IC electrically coupled to the communication antenna, a receiving coil, a resonant capacitor forming a receiving resonant circuit together with the receiving coil, a rectifying and smoothing circuit coupled to the receiving resonant circuit, receiving display elements, a power control unit that controls power from the receiving resonant circuit, and an electronic function circuit that operates by using the power from the receiving resonant circuit. In response to the receiving coil receiving the power, the power control circuit indicates a power receiving state to a user by driving the receiving display elements.