Micro LED Display Electrode Layout for Full-Area Fingerprint Sensing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing display technologies with micro light emitting diodes (micro LEDs) lack an efficient method for integrating a fingerprint sensor for personal identification within the display apparatus.
Innovation Solution
A display apparatus with a detecting device is designed, featuring a substrate with pixels, inorganic light emitting elements, detection electrodes with specific linear and bent parts, and drive electrodes. This configuration allows for fingerprint detection across the entire display region by utilizing the detection electrodes and drive electrodes to sense recesses and protrusions on a surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fingerprint sensor is integrated into the display apparatus, then personal identification capability is enhanced, but device complexity increases
Solution Approach 1:
The patent combines the fingerprint sensor electrodes with the display electrode structures, where detection electrodes and drive electrodes serve dual purposes: driving the micro LED display and sensing fingerprint patterns. This integration eliminates separate sensor components while maintaining both display and biometric identification functions.
Solution Approach 2:
The electrode structures in the display apparatus are designed to perform multiple functions simultaneously - they serve as both driving electrodes for the micro LED pixels and detection electrodes for fingerprint sensing. This multi-functionality reduces overall device complexity by eliminating dedicated separate components for each function.
2Measurement precision
If detection electrodes with bent parts are used, then fingerprint detection precision is improved, but manufacturing precision requirements increase
Solution Approach 1:
The detection electrodes incorporate bent parts with specific curvatures that follow the natural contours of fingerprint ridges and valleys. These curved geometries enhance the electrodes' ability to conform to and detect the three-dimensional surface features of fingerprints, thereby improving detection precision through geometric adaptation.
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 display apparatus effectively detects fingerprints based on surface features, enhancing personal identification capabilities while maintaining the display functionality, thereby addressing the need for integrated fingerprint sensing in micro LED displays.
Implementation Method 1
a plurality of detection electrodes arranged in a first direction parallel to the substrate, and a plurality of drive electrodes arranged in a second direction intersecting the first direction and provided intersecting the detection electrodes in planar view seen from a direction perpendicular to the substrate
Data Source
AI summary
A display apparatus with a detecting device includes a substrate, a plurality of pixels provided to the substrate, an inorganic light emitting element provided to each of the pixels, a plurality of detection electrodes arranged in a first direction parallel to the substrate, and a plurality of drive electrodes arranged in a second direction intersecting the first direction and provided intersecting the detection electrodes in planar view seen from a direction perpendicular to the substrate. The detection electrodes each includes a plurality of first linear parts, a plurality of second linear parts extending in a direction intersecting the first linear parts, and a bent part that couples the first linear part and the second linear part, the first linear parts and the second linear parts are metal thin wires, and the drive electrodes are translucent electric conductors.