Fingerprint Sensor Light-Emitting Region Sleep Mode Guidance
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Solution Overview
Problem
Users face inconvenience when trying to perform fingerprint verification in sleep mode on electronic devices, as the dark display panel makes it difficult to determine where to press their finger, leading to potential security risks and usability issues.
Innovation Solution
An electronic device with a display panel that emits light only from a specific light-emitting region in sleep mode, containing fingerprint sensing pixel units and a recognition circuit, guides the user to press their finger within this region for verification, allowing the device to wake up from sleep mode when a matching fingerprint is detected.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the display panel is temporarily shut down in sleep mode to save energy, then power consumption is reduced, but the user cannot see where to press their finger for fingerprint verification
Solution Approach 1:
The display panel is divided into a light-emitting region and a non-light-emitting region. Only the light-emitting region remains active during sleep mode to provide visual guidance for fingerprint verification, while the rest of the display panel remains dark to conserve energy. This local differentiation allows the system to maintain minimal visibility exactly where needed without activating the entire display.
Solution Approach 2:
The display panel's pixel units are segmented into different functional types: light-emitting pixel units that remain active during sleep mode and non-light-emitting pixel units that are turned off. This segmentation allows independent control of different regions, enabling the system to provide guidance information only in specific areas while maintaining overall energy savings.
2Ease of operation
If the entire display panel remains lit in sleep mode to guide finger placement, then user convenience is improved, but power consumption increases
Solution Approach 1:
Instead of illuminating the entire display panel, only the light-emitting region is activated to provide guidance. This localized illumination approach provides sufficient visual information for users to locate the fingerprint verification area while consuming minimal power compared to full-display illumination.
Solution Approach 2:
The system applies partial action by activating only the necessary portion of the display (the light-emitting region) rather than the entire panel. This partial illumination is sufficient to guide finger placement without the excessive energy consumption of full-display activation.
3Loss of information
If fingerprint sensing pixel units are disposed within the light-emitting region, then guidance information is provided, but the device complexity increases
Solution Approach 1:
The fingerprint sensing pixel units are merged with the display panel's light-emitting pixel units, allowing both functions (display and fingerprint sensing) to be integrated in the same region. This integration eliminates the need for separate sensing components and reduces overall device complexity while still providing visual guidance.
Solution Approach 2:
The pixel units in the light-emitting region serve multiple functions: they provide visual guidance information and simultaneously act as fingerprint sensing elements. This multi-functionality reduces the need for additional components and simplifies the overall device architecture.
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
Enhances user convenience and security by providing a clear indication of where to press the finger for verification, ensuring seamless transition from sleep to normal operation mode.
Implementation Method 1
the display panel emits light from the light-emitting region
Data Source
AI summary
The present invention provides an electronic device comprising an operating circuit, wherein when the electronic device is in a sleep mode, the operating circuit is temporarily off; a display panel, comprising a light-emitting region; a plurality of fingerprint sensing pixel units, disposed within the light-emitting region; and a fingerprint recognition circuit, coupled to the plurality of fingerprint sensing pixel units; wherein when the electronic device is in the sleep mode, the display panel emits light from the light-emitting region, and the display panel does not emit light except other than the light-emitting region.