Screen Assembly Segmentation for Low-Cost Large-Area Fingerprint Recognition
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Solution Overview
Problem
The high cost of smartphones with large-screen fingerprint recognition is attributed to the large area of the photosensitive surface of the image sensor, necessitating a solution that reduces sensor area while maintaining recognition accuracy.
Innovation Solution
A screen assembly with a display panel and a recognition panel stacked such that image sensors on the non-light-emitting side capture fingerprint images in a one-to-one correspondence with recognition regions, allowing for partial capturing and reducing sensor area without compromising recognition precision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the photosensitive surface area of the image sensor is increased to achieve large-screen fingerprint recognition, then the fingerprint recognition coverage area is improved, but the cost of the smartphone increases significantly
Solution Approach 1:
The display panel is divided into multiple recognition regions and non-recognition regions. The photosensitive surface of the image sensor only needs to capture images from the recognition regions, which are segmented areas where fingerprint recognition is needed. This segmentation allows the effective capture area to meet recognition requirements while reducing the total photosensitive surface area, thereby lowering cost while maintaining large-screen fingerprint recognition capability.
2Area of stationary object
If the image sensor is placed on the non-light-emitting side of the display panel to increase display area, then the screen-to-body ratio is improved, but the structural complexity increases
Solution Approach 1:
The display panel and recognition panel are merged into a single integrated structure. The image sensor is placed on the non-light-emitting side of the display panel, combining the display function and fingerprint recognition function in one component. This merging eliminates the need for separate fingerprint sensor modules, reduces structural complexity, and maximizes the screen-to-body ratio while maintaining both display area and recognition capability.
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
The solution enables large-area fingerprint recognition with reduced costs by optimizing sensor placement and area utilization, facilitating narrow bezelization and maintaining high recognition accuracy.
Implementation Method 1
The photosensitive surface of the image sensor can convert a light image formed on the photosensitive surface into an electrical signal in proportion to the light image
Data Source
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AI summary
Embodiments of this application disclose a screen assembly, including a display panel and a recognition panel located on a non-light-emitting side of the display panel. The display panel includes a plurality of recognition regions. A non-recognition region is formed between two adjacent and mutually spaced recognition regions. The recognition panel includes a plurality of image sensors. Photosensitive surfaces of the plurality of image sensors are configured to capture, in a one-to-one correspondence, user fingerprint images located in the plurality of recognition regions. A ratio of a total area of all the recognition regions to a total area of all the non-recognition regions in a fingerprint coverage region is greater than or equal to 1:5. The screen assembly may implement large-area fingerprint recognition with relatively low costs. The embodiments of this application further disclose an electronic device.