Display Pixel and Sensor Layout for High-Aperture Fingerprint Sensing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The integration of fingerprint identification elements in display panels affects the aperture ratio of high-resolution displays, particularly due to the presence of wires that interfere with pixel functionality.
Innovation Solution
A design where sensor units and signal lines are arranged to minimize overlap, allowing for shared use of signal lines between sub-pixels and bio-sensor units, reducing the number of traces and holes required, thereby increasing the aperture ratio and maintaining high-resolution display and fingerprint identification capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If fingerprint identification elements are integrated into the display panel, then fingerprint identification function is achieved, but the aperture ratio of pixels is reduced
Solution Approach 1:
The patent merges the fingerprint sensor units with the display pixel structure by disposing sensor units between sub-pixels and sharing signal lines between display elements and sensor elements. This integration allows fingerprint identification functionality to be incorporated into the display panel without requiring separate dedicated space, thereby minimizing the impact on aperture ratio while achieving biometric authentication capability.
Solution Approach 2:
The signal lines in the display panel are designed to serve dual purposes: transmitting signals for display pixel operation and transmitting signals for fingerprint sensor operation. This multi-functionality reduces the total number of signal lines required, freeing up space that would otherwise be occupied by additional wiring, thus preserving aperture ratio while enabling fingerprint identification.
2Reliability
If more signal lines are added for sensor units, then sensor functionality is enhanced, but device complexity increases
Solution Approach 1:
The patent implements signal line sharing where the same signal lines are used for both display pixel control and fingerprint sensor operation. Different signal lines are disposed to transmit different signals at different times or for different purposes, reducing the total count of signal lines required while maintaining full functionality of both display and sensor systems.
Solution Approach 2:
The system dynamically allocates signal line usage based on operational mode - during display operation, signal lines serve pixel control functions; during fingerprint sensing operation, the same signal lines are repurposed for sensor communication. This dynamic sharing reduces static wiring complexity while ensuring reliable sensor functionality when needed.
Data Source
AI summary
An electronic device includes a substrate, and a plurality of sensor units, a first sub-pixel, a second sub-pixel, a third sub-pixel and a signal line, all of which are disposed on the substrate. The second sub-pixel is adjacent to the first sub-pixel. In a top view of the electronic device, the first sub-pixel and the second sub-pixel are arranged along a first direction, and at least one of the sensor units is disposed between the first sub-pixel and the second sub-pixel. The third sub-pixel is adjacent to the second sub-pixel. In the top view, the second sub-pixel and the third sub-pixel are arranged along a second direction. The signal line is configured to transmit a touch signal. In the top view, the signal line is disposed between the second sub-pixel and the third sub-pixel, and is not overlapped with the at least one of the sensor units.