Multi-Application Card Surface Features Account Selection

Solution Overview

Problem

Co-badge payment cards face challenges in allowing cardholders to easily select between multiple payment network applications, as existing POS terminals may not support this functionality, and updating terminals to support new cards is difficult, leading to increased costs and complexity.

Innovation Solution

A user card with surface features such as capacitive buttons or a fingerprint sensor allows cardholders to select an account by interacting with the surface features, which then provides credentials to the terminal, masking other accounts and appearing as a single-application card.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If a battery is incorporated in the card to enable on-card screen and buttons for account selection, then the card can provide account selection functionality, but the manufacturing cost increases 5-20 times and the card structure becomes more complex

Engineering Contradiction:

Improveaccount selection functionalityVSAvoidcard structure

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

The patent removes the battery component from the card by using contactless payment technology. The card uses the terminal's electromagnetic field to power the selection process, eliminating the need for an on-card battery while maintaining account selection functionality through capacitive touch sensors and contactless communication.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent replaces mechanical button components with capacitive touch sensors that detect finger proximity and contact. This substitution eliminates the need for physical mechanical buttons and their associated hardware, reducing structural complexity while maintaining interactivity.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Ease of operation

If a battery is incorporated in the card to enable on-card screen and buttons for account selection, then the card can provide account selection functionality, but the manufacturing cost increases 5-20 times

Engineering Contradiction:

Improveaccount selection functionalityVSAvoidmanufacturing cost

Core Design Contradiction:

Ease of operationVSEase of manufacture

Solution Approach 1:

The patent removes the battery component from the card by using contactless payment technology. The card uses the terminal's electromagnetic field to power the selection process, eliminating the need for an on-card battery while maintaining account selection functionality through capacitive touch sensors and contactless communication.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent makes the existing card chip and antenna serve multiple functions: they not only handle payment processing but also power the capacitive touch sensors and process account selection inputs through contactless communication, eliminating the need for separate battery-powered components.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Ease of operation

If a battery is incorporated in the card to enable on-card screen and buttons for account selection, then the card can provide account selection functionality, but the durability decreases due to extra components

Engineering Contradiction:

Improveaccount selection functionalityVSAvoidcard durability

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The patent removes the battery component from the card by using contactless payment technology. The card uses the terminal's electromagnetic field to power the selection process, eliminating the need for an on-card battery while maintaining account selection functionality through capacitive touch sensors and contactless communication.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent uses thin-film capacitive touch sensors that can be integrated directly into the card surface without adding bulky components. These thin-film structures maintain card flexibility and durability while providing touch interaction capabilities.

Inventive Principle:

Principle #30Flexible shells and thin films

4Ease of operation

If the card includes surface features for account selection, then the cardholder can select accounts without terminal interaction, but the card requires electromagnetic field power from the terminal

Engineering Contradiction:

Improveaccount selection convenienceVSAvoidpower requirement

Core Design Contradiction:

Ease of operationVSUse of energy by moving object

Solution Approach 1:

The patent pre-loads multiple account credentials and capacitive touch sensor mappings into the card's memory during manufacturing. When the card is inserted into a terminal, the account selection interface is already ready to respond immediately to user touch inputs without requiring power to load or initialize selection options.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent uses the terminal's existing electromagnetic field as an intermediary energy source to power the card's capacitive touch sensors and communication protocols during the selection process, eliminating the need for an on-card battery while enabling account selection functionality.

Inventive Principle:

Principle #24Intermediary (Mediator)

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

This solution enables cardholders to seamlessly select and use multiple payment applications without needing to interact with the terminal, reducing complexity and costs, while maintaining a user-friendly payment experience.

Implementation Method 1

The card is powered up when placed in an operating proximity of the terminal

Methodology Applied

Scientific EffectElectromagnetic induction: Electromagnetic Induction

Data Source

PatentUS20250139610A1Card with surface features for account selection

Publication Date: 2025.05.01 VISA INTERNATIONAL SERVICE ASSOCIATION

AI summary

One or more surface features (e.g., capacitive buttons, fingerprint sensor) may be exposed on a surface of a card (e.g., chi payment card). The card may store multiple applications/accounts of a user. The card receives a selection of one of the accounts by the user placing a finger on or pressing on a surface feature associated with the selected account. The card provides credentials associated with the selected account to a terminal. The multi-application card may disable credentials associated with the remaining accounts thereby appearing as a single-application card to the terminal during a transaction.