Screen Module Fingerprint Sensors Partial Scanning
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Solution Overview
Problem
Fingerprint sensors in mobile devices require long scanning times and high power consumption due to scanning the entire touch screen area, which is inefficient and power-intensive.
Innovation Solution
A screen module with fingerprint sensors integrated into the content display area, where a processing component actuates sensors in a specific scanning area upon user input, reducing the need for full-screen scanning and minimizing power usage by arranging sensors within the black matrix areas of an LCD display module.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the scanning circuit scans fingerprint data through the whole area of the touch screen, then the fingerprint acquisition coverage is complete, but the scanning time is long and power consumption is high
Solution Approach 1:
The patent divides the touch screen into multiple fingerprint sensing units, each capable of independent fingerprint acquisition. When a touch event occurs, only the specific sensing unit corresponding to the touch location is activated, rather than scanning the entire screen. This segmentation enables localized fingerprint scanning, significantly reducing scanning time while maintaining complete fingerprint acquisition coverage through the distributed arrangement of multiple sensing units across the screen area.
2Measurement precision
If the scanning circuit scans fingerprint data through the whole area of the touch screen, then the fingerprint acquisition coverage is complete, but the power consumption of the scanning circuit is high
Solution Approach 1:
The touch screen is divided into multiple independent fingerprint sensing units with separate scanning circuits. Only the sensing unit corresponding to the touch location is activated, reducing power consumption compared to activating the entire screen's scanning circuit. This segmentation allows the system to maintain complete fingerprint acquisition coverage while minimizing energy usage by activating only the necessary portion of the system.
Solution Approach 2:
Instead of activating the entire touch screen scanning circuit, the system activates only the specific sensing unit required for fingerprint acquisition based on touch location. This partial action approach reduces power consumption by avoiding unnecessary activation of other sensing units, while still achieving complete fingerprint coverage through the distributed sensing unit arrangement.
3Device complexity
If fingerprint sensors are integrated into the content display area, then the device structure is simplified and physical buttons are eliminated, but the sensors must be arranged within the black matrix areas
Solution Approach 1:
The patent places fingerprint sensors specifically within the black matrix areas of the display, which are non-display regions. This local quality approach allows sensor integration into the content display area without affecting the display quality or requiring changes to the active display regions. The black matrix areas provide suitable spaces for sensor placement, simplifying the overall device structure by eliminating physical buttons while maintaining manufacturing feasibility.
Data Source
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AI summary
The present invention is related to a screen module, and a fingerprint acquisition method and apparatus. The screen module comprises: a fingerprint unit comprising a plurality of fingerprint sensors (11), which are located in a content display area (10) of the screen module and configured to perform fingerprint acquisition; a processing component (12) connected with the fingerprint unit, the processing component (12) being configured to, after a triggering operation of a user's finger on the content display area is detected, actuate fingerprint sensors (11) in a scanning area (14) corresponding to the triggering operation to acquire fingerprint data of the user in the scanning area (14); and data transmission lines (13) connected to the plurality of fingerprint sensors (11), and configured to transmit fingerprint data acquired by the fingerprint sensors (11) in the scanning area (14) to the processing component (12). With the technical solution of the present invention, partial scanning of the content display area can be realized, and fingerprint scanning through the whole content display area is avoided, so that scanning time for fingerprint sensors is shortened.