Foldable Display Fingerprint Calibration for Screen Deformation
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Solution Overview
Problem
The deformation of foldable display screens affects the accuracy of fingerprint detection due to changes in the correspondence relationship between imaging holes and sensing elements, leading to inaccurate fingerprint imaging and identification.
Innovation Solution
A calibration method that determines a target sensing element group corresponding to each imaging hole in the folded state, using displacement and quantity differences to ensure accurate fingerprint imaging and identification by updating the correspondence relationship as the display apparatus changes states.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the foldable display screen is folded, then the portability is improved, but the correspondence relationship between imaging holes and sensing elements changes, leading to decreased fingerprint detection accuracy
Solution Approach 1:
The patent applies dynamics by making the sensing element group configurable and adaptable based on the display screen's folding state. The system dynamically adjusts which sensing elements are activated and how they are grouped, transitioning from a static sensor array to a dynamic configuration that responds to the physical state of the display, thereby maintaining fingerprint detection accuracy across different portability states
Solution Approach 2:
The patent implements parameter changes by modifying the operational parameters of the fingerprint sensor based on the folding state. Specifically, it changes the active sensing elements, their grouping configuration, and the correspondence mapping between imaging holes and sensing elements. This allows the system to adapt to geometric transformations while maintaining measurement precision through parameter adjustment rather than physical restructuring
2Measurement precision
If the correspondence relationship between imaging holes and sensing elements is updated for each folding state, then the fingerprint detection accuracy is improved, but the system complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-establishing correspondence relationships between imaging holes and sensing elements for different folding states during the design phase. These pre-defined mappings are stored in the system, allowing rapid selection and activation based on the current folding state without requiring complex real-time calculations or recalibrations, thus reducing operational complexity while maintaining precision
Solution Approach 2:
The system implements self-service by automatically detecting the folding state and selecting the appropriate sensing element configuration and correspondence relationship without requiring manual intervention. The system self-adjusts the active sensing elements and their mapping to imaging holes based on the detected geometric state, reducing the need for external calibration procedures and simplifying user interaction
Data Source
AI summary
A foldable display apparatus and a calibration method for fingerprint detection of the foldable display apparatus. The foldable display apparatus includes a display panel and a fingerprint identification sensor. The display panel includes imaging holes. The fingerprint identification sensor includes sensing elements. The method includes: after the foldable display apparatus is switched from an unfolded state to a folded state, determining a target sensing element group corresponding to an imaging hole when the foldable display apparatus is in the folded state, the target sensing element group includes a target number of sensing element in the sensing elements, a center of the target sensing element group is located at a target position, and the target number is an integer greater than or equal to 1; and in the folded state, imaging a fingerprint pattern based on a signal fed back by the target sensing element group corresponding to the imaging hole.