Fingerprint Sensor Touch Guidance for Complete Acquisition

Solution Overview

Problem

Fingerprint sensors with smaller sizes struggle to acquire entire fingerprint information, leading to reduced recognition accuracy due to partial fingerprint scanning, making it difficult to detect unregistered regions effectively.

Innovation Solution

An electronic device with a touch sensor and a fingerprint sensor, where a processor detects touch inputs, acquires touch information, and displays a graphic object to guide the user in positioning their fingerprint correctly over the fingerprint sensing region, ensuring the entire fingerprint is scanned.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Volume of moving object

If the fingerprint sensor size is reduced, then the device compactness is improved, but the fingerprint acquisition completeness deteriorates

Engineering Contradiction:

Improvefingerprint sensor sizeVSAvoidfingerprint acquisition completeness

Core Design Contradiction:

Volume of moving objectVSMeasurement precision

Solution Approach 1:

The system performs preliminary detection of the user's fingerprint region using the touch sensor before actual fingerprint acquisition. By detecting the touch input and determining the graphic object that represents the fingerprint region, the system prepares guidance information in advance to help the user position their finger correctly, ensuring complete fingerprint acquisition despite the small sensor size

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system provides visual feedback through the display by showing a graphic object that represents the fingerprint region and guides the user on how to position their finger. This feedback mechanism allows the user to adjust their finger placement to ensure the entire fingerprint is captured within the small sensor area, improving acquisition completeness

Inventive Principle:

Principle #23Feedback

2Volume of moving object

If the fingerprint sensor size is reduced, then the device compactness is improved, but the recognition accuracy deteriorates

Engineering Contradiction:

Improvefingerprint sensor sizeVSAvoidrecognition accuracy

Core Design Contradiction:

Volume of moving objectVSReliability

Solution Approach 1:

The system performs preliminary detection of the user's fingerprint region using the touch sensor before actual fingerprint acquisition. By detecting the touch input and determining the graphic object that represents the fingerprint region, the system prepares guidance information in advance to help the user position their finger correctly, ensuring complete fingerprint acquisition despite the small sensor size

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system provides visual feedback through the display by showing a graphic object that represents the fingerprint region and guides the user on how to position their finger. This feedback mechanism allows the user to adjust their finger placement to ensure the entire fingerprint is captured within the small sensor area, improving acquisition completeness

Inventive Principle:

Principle #23Feedback

3Measurement precision

If multiple fingerprint inputs are required to acquire complete fingerprint information, then the fingerprint acquisition completeness is improved, but the operation complexity increases

Engineering Contradiction:

Improvefingerprint acquisition completenessVSAvoidoperation complexity

Core Design Contradiction:

Measurement precisionVSEase of operation

Solution Approach 1:

The system performs preliminary detection of the user's fingerprint region using the touch sensor before actual fingerprint acquisition. By detecting the touch input and determining the graphic object that represents the fingerprint region, the system prepares guidance information in advance to help the user position their finger correctly, ensuring complete fingerprint acquisition despite the small sensor size

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system provides visual feedback through the display by showing a graphic object that represents the fingerprint region and guides the user on how to position their finger. This feedback mechanism allows the user to adjust their finger placement to ensure the entire fingerprint is captured within the small sensor area, improving acquisition completeness

Inventive Principle:

Principle #23Feedback

Data Source

PatentEP3312752B1Electronic device and method for acquiring fingerprint information

Publication Date: 2020.08.26 SAMSUNG ELECTRONICS CO LTD

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AI summary

An electronic device is provided. The electronic device includes a touch sensor, a fingerprint sensor, a display, and a processor. The display includes a display region having a fingerprint sensing region. The processor is configured to detect a touch input for the fingerprint sensing region by using the touch sensor, and to acquire touch information, corresponding to the touch input, on the display. In addition, the processor is configured to determine a graphic object for guiding acquisition of a user's fingerprint corresponding to the touch input through the fingerprint sensing region, based at least on the touch information. Also, the processor is configured to display the graphic object through the fingerprint sensing region of the display or proximity thereof.