Sliding Housing Reinforcing Sheet for Fingerprint Sensor Alignment
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Solution Overview
Problem
In rollable or slidable electronic devices, the position of an in-display fingerprint sensor changes with the device's usage state, affecting usability due to the flexible display's physical changes, leading to inconsistent fingerprint recognition areas.
Innovation Solution
An electronic device design featuring a housing with a sliding mechanism, a flexible display, and a reinforcing sheet with adjustable opening areas to maintain a fixed fingerprint recognition area regardless of the device's state, ensuring consistent usability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If an in-display fingerprint sensor is applied to a rollable or slidable type electronic device, then the device can provide extended display area and flexible usage, but the position of the fingerprint sensor changes depending on the usage state, deteriorating user usability
Solution Approach 1:
The reinforcing sheet is divided into multiple opening areas (first opening area, second opening area, third opening area) corresponding to different usage states. Each opening area is positioned to align with the fingerprint sensor when the flexible display is in a specific state (fully retracted, partially extended, fully extended), ensuring consistent fingerprint recognition across all states without requiring a single fixed sensor position.
Solution Approach 2:
The reinforcing sheet transitions from a static structure to a dynamic one with multiple opening areas that become active depending on the display extension state. The system adapts the effective opening area based on the current state, making the fingerprint recognition capability dynamic and state-dependent rather than fixed.
2Adaptability or versatility
If the flexible display is drawn in or out of the housing, then the display area can be adjusted, but the position of the fingerprint sensor relative to the display panel changes, affecting recognition accuracy
Solution Approach 1:
The reinforcing sheet is segmented into multiple opening areas (first, second, and third opening areas) positioned at different locations. Each opening area is designed to align with the fingerprint sensor when the flexible display is in a specific extension state, ensuring that the sensor maintains proper positioning relative to the display panel across all states without requiring complex mechanical positioning mechanisms.
3Device complexity
If a single opening area is used in the reinforcing sheet, then the structure is simple, but it cannot maintain consistent fingerprint recognition area across different device states
Solution Approach 1:
The reinforcing sheet incorporates multiple opening areas (first opening area, second opening area, third opening area) instead of a single opening. Each opening area is positioned to align with the fingerprint sensor in different usage states, ensuring consistent fingerprint recognition across all states. This segmentation approach maintains structural simplicity while achieving reliable multi-state functionality.
4Device complexity
If the fingerprint sensor is disposed directly on the flexible display, then the structure is compact, but the sensor position changes with display extension, deteriorating usability
Solution Approach 1:
The fingerprint sensor is extracted from direct mounting on the flexible display and repositioned on a separate circuit board. The reinforcing sheet with multiple opening areas serves as the positioning mechanism, allowing the sensor to maintain consistent alignment with the display panel across different extension states without being directly coupled to the flexible display's movement.
Data Source
AI summary
An electronic device is provided. The electronic device includes a housing including a first housing and a second housing connected to the first housing to slide within a designated range, a flexible display including a display panel and a reinforcing sheet, the flexible display including a first portion and a second portion extended from the first portion, and drawn in or out of the housing as the second housing moves with respect to the first housing, a circuit board, and a fingerprint sensor spaced from a rear surface of the flexible display, and disposed on the circuit board. The reinforcing sheet may include a first opening area disposed between the fingerprint sensor and the display panel with the second portion drawn in and a second opening area disposed between the fingerprint sensor and the display panel with the second portion drawn out.