Fingerprint Recognition Substrate with Inter-Pixel Light Transmission Holes
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Solution Overview
Problem
Current fingerprint recognition technologies in display devices face challenges in efficiently integrating fingerprint recognition functionality with display functions, particularly in providing a secure and convenient method for personal identification in electronic devices with display capabilities.
Innovation Solution
A fingerprint recognition substrate and apparatus are designed with a base substrate featuring pixel regions, light emitting layers, electrodes, and light transmission holes that are optically coupled to photosensors, allowing for effective light transmission and reflection detection, enhancing recognition accuracy and sensitivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If light transmission holes are added to the display substrate for fingerprint recognition, then fingerprint recognition accuracy is improved, but display quality may deteriorate due to potential light leakage or reduced display uniformity
Solution Approach 1:
The patent applies local quality by making the light transmission holes localized specifically in the region between pixel regions rather than uniformly across the entire display substrate. This localized approach allows light transmission for fingerprint recognition only where needed, while maintaining display quality in the pixel regions. The holes are positioned to exploit the existing optical path gaps between pixels, thereby improving fingerprint recognition accuracy without compromising overall display uniformity.
2Adaptability or versatility
If the display substrate is used for both display and fingerprint recognition functions, then device integration is improved, but manufacturing complexity increases
Solution Approach 1:
The patent implements universality by designing the display substrate to serve dual functions: display and fingerprint recognition. The same substrate structure with light transmission holes enables both functions without requiring separate components. The light emitting layers and electrodes are configured to provide display functionality, while the light transmission holes simultaneously enable optical coupling for fingerprint sensing, thereby improving device integration and reducing overall system complexity.
Solution Approach 2:
The patent applies segmentation by dividing the substrate into distinct functional zones: pixel regions for display and regions between pixel regions for fingerprint recognition. This segmentation allows independent optimization of each function while maintaining overall integration. The light transmission holes are specifically positioned in the inter-pixel regions, creating distinct optical pathways that enable both display and sensing functions to operate independently without interfering with each other, thus simplifying the manufacturing process.
3Measurement precision
If light transmission holes are positioned between pixel regions, then fingerprint recognition sensitivity is improved, but display area is reduced
Solution Approach 1:
The patent applies partial action by positioning light transmission holes only in the regions between pixel regions rather than across the entire substrate. This partial placement is sufficient to achieve effective fingerprint recognition sensitivity while minimizing impact on display area. The holes are concentrated in the inter-pixel spaces where they provide the necessary optical coupling for sensing without significantly reducing the overall displayable area, thereby achieving the desired sensitivity with minimal trade-off.
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 solution simplifies the configuration and improves the accuracy and sensitivity of fingerprint recognition by utilizing light transmission holes to transmit reflected light from the fingerprint to the photosensor, effectively integrating fingerprint recognition with display functions in electronic devices.
Implementation Method 1
a light emitting layer at least in the plurality of pixel regions
Implementation Method 2
a plurality of light transmission holes penetrating at least the first electrodes; wherein at least one light transmission holes is in the region between the plurality of pixel regions, and the plurality of light transmission holes are configured to be optically coupled to a photosensor
Implementation Method 3
transmitting reflected light by means of the plurality of light transmission holes
Implementation Method 4
the plurality of light transmission holes are configured to be optically coupled to a photosensor
Data Source
AI summary
A fingerprint recognition substrate, a fingerprint recognition apparatus, a manufacturing method thereof, a fingerprint recognition method, and a display device are provided. The fingerprint recognition substrate includes a base substrate including a plurality of pixel regions and a region between the plurality of pixel regions, a first electrode in the plurality of pixel regions, a light emitting layer at least in the plurality of pixel regions, and a second electrode at least in the plurality of pixel regions, and at least a plurality of light transmission holes penetrating the first electrode. At least one light transmission hole is in the region between the plurality of pixel regions, and the plurality of light transmission holes are configured to be optically coupled to a photosensor.