Multiplexing Fingerprint Units for Ambient Light Sensing
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Solution Overview
Problem
Current electronic devices with fingerprint recognition components are limited to fingerprint image acquisition and lack ambient-light sensing capabilities, which can complicate product structure and manufacturing processes.
Innovation Solution
A display panel and device that integrates fingerprint recognition units with ambient-light sensing functionality, where at least part of the fingerprint recognition units are multiplexed as light-sensing units, allowing for simultaneous fingerprint image acquisition and ambient-light sensing without the need for additional hardware.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If separate ambient-light sensing units are added to the display panel, then ambient-light sensing capability is improved, but device complexity and manufacturing difficulty increase
Solution Approach 1:
The fingerprint recognition units are designed to serve dual purposes: fingerprint image acquisition and ambient-light sensing. By multiplexing the same hardware components for both functions, the patent eliminates the need for separate ambient-light sensing units, thereby maintaining adaptability while reducing device complexity and manufacturing difficulty
2Adaptability or versatility
If separate ambient-light sensing units are added to the display panel, then ambient-light sensing capability is improved, but manufacturing process complexity increases
Solution Approach 1:
The patent implements multi-functionality by enabling fingerprint recognition units to perform both fingerprint acquisition and ambient-light sensing. This approach simplifies the manufacturing process by reducing the number of distinct components that need to be assembled and tested, while still providing comprehensive sensing capabilities
3Device complexity
If fingerprint recognition units are multiplexed as light-sensing units, then device complexity is reduced, but time-sharing control complexity increases
Solution Approach 1:
The patent employs periodic action by dividing the driving period into distinct stages: display stage, fingerprint recognition stage, and ambient-light sensing stage. This time-division multiplexing approach allows the same hardware to be efficiently reused for different functions at different time intervals, minimizing control complexity while maintaining high productivity
4Device complexity
If time-sharing multiplexing is implemented, then device structure is simplified, but control method complexity increases
Solution Approach 1:
The patent implements periodic action through structured time-division multiplexing, where each driving period contains clearly defined stages for display, fingerprint recognition, and ambient-light sensing. This systematic approach simplifies the control methodology while ensuring efficient use of the multiplexed hardware resources
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
This integration simplifies the product structure and manufacturing process while enabling both fingerprint recognition and ambient-light sensing functions, enhancing user experience by adaptively adjusting display brightness based on ambient light conditions.
Implementation Method 1
a plurality of fingerprint recognition units, located in the display region
Implementation Method 2
ambient-light sensing units, including at least one first light-sensing unit
Data Source
AI summary
A display panel is provided with a display region and a non-display region, and includes a plurality of sub-pixels, located in the display region; a plurality of fingerprint recognition units, located in the display region; and ambient-light sensing units, including at least one first light-sensing unit. At least a part of the plurality of fingerprint recognition units is multiplexed as the at least one first light-sensing unit.