Fingerprint Sensor Guide Display for Complete Capture
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Solution Overview
Problem
The challenge is to effectively integrate a small-sized fingerprint sensor into electronic devices with limited space, such as smartphones, while ensuring accurate fingerprint recognition without increasing production costs and without requiring users to repeatedly position their fingers to capture the entire fingerprint image.
Innovation Solution
The solution involves displaying a guide on the device's screen to help users position their fingers correctly over the fingerprint sensor, allowing the sensor to obtain fingerprint information through overlapping regions, and adjusting the guide's position and shape to ensure comprehensive fingerprint capture.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the size of fingerprint sensor is reduced to fit limited space, then the area occupied by the sensor decreases, but the ability to capture the entire fingerprint image deteriorates
Solution Approach 1:
The patent applies dimensionality change by displaying a guide pattern on the screen surface that overlaps with the fingerprint sensor region. The guide provides directional information (first direction and second direction) to guide users to move their fingers across the sensor in multiple directions, effectively using the 2D screen surface to compensate for the limited sensor area and ensure complete fingerprint capture.
Solution Approach 2:
The guide displayed on the screen acts as an intermediary between the user and the fingerprint sensor. It provides visual feedback and directional guidance to help users position and move their fingers correctly over the small sensor area, enabling complete fingerprint capture without requiring a larger sensor.
2Ease of manufacture
If the size of fingerprint sensor is reduced, then production cost decreases, but the number of recognition procedures required increases
Solution Approach 1:
The system implements feedback by displaying the guide on the screen that shows the current fingerprint recognition progress and provides directional guidance. This real-time feedback helps users understand which regions need to be scanned, reducing the number of repeated procedures needed to capture the complete fingerprint image with a small sensor.
Solution Approach 2:
The guide is displayed in advance before fingerprint recognition begins, showing users the expected finger placement and movement directions. This preliminary action prepares users for the recognition process, reducing confusion and the number of attempts needed when using a small sensor.
3Measurement precision
If guide is displayed to improve fingerprint capture accuracy, then measurement precision improves, but device complexity increases
Solution Approach 1:
The display screen serves multiple functions: it displays the guide for fingerprint positioning, shows feedback during recognition, and provides directional information. By making the display multi-functional, the patent avoids adding separate dedicated components, thus improving measurement precision without significantly increasing device complexity.
Data Source
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AI summary
An electronic apparatus is provided. The electronic device includes a display, a fingerprint sensor disposed under the display, and a processor electrically connected with the display and the fingerprint sensor. The processor is configured to set a fingerprint sensing region at a location, which corresponds to a location where the fingerprint sensor is disposed, on the display if the electronic apparatus enters a state for registering a fingerprint of a finger, to display a first guide on the display such that the first guide at least partly overlaps the fingerprint sensing region, to obtain first fingerprint information through the fingerprint sensing region if the finger touches the first guide, to display a second guide on the display such that the second guide at least partly overlaps the fingerprint sensing region, and to obtain second fingerprint information through the fingerprint sensing region if the finger touches the second guide.