Display Panel Fingerprint Recognition Moiré Pattern Elimination
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Solution Overview
Problem
Existing display panels with fingerprint recognition functions suffer from precision issues due to misalignment between light emitting units and fingerprint recognition units, leading to Moiré patterns that affect the accuracy of fingerprint recognition.
Innovation Solution
The display panel incorporates an array substrate with light emitting units and fingerprint recognition units, where each fingerprint recognition unit is configured with at least one sub-light emitting unit, ensuring their orthogonal projections overlap, thereby aligning boundaries and preventing Moiré patterns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If light emitting units and fingerprint recognition units are disposed separately with potential boundary misalignment, then device complexity is reduced, but fingerprint recognition precision deteriorates due to Moiré patterns
Solution Approach 1:
The patent merges the light emitting unit and fingerprint recognition unit into a single integrated structure where the fingerprint recognition unit is disposed within the light emitting unit. This integration ensures that the boundaries of both units are aligned, eliminating Moiré patterns while maintaining relatively simple device architecture.
2Measurement precision
If boundaries of light emitting unit and fingerprint recognition unit are aligned, then fingerprint recognition precision is improved, but manufacturing complexity increases
Solution Approach 1:
By merging the two units into one integrated structure, the patent achieves boundary alignment inherently through the unified design, avoiding the need for separate alignment processes and reducing manufacturing complexity despite improved precision.
Solution Approach 2:
The light emitting unit is divided into multiple sub-light emitting units, and the fingerprint recognition unit is correspondingly segmented, allowing for modular manufacturing while maintaining precise boundary alignment through the integrated structure.
3Measurement precision
If multiple sub-light emitting units are used with corresponding fingerprint recognition units, then fingerprint recognition precision is improved, but device complexity increases
Solution Approach 1:
The light emitting unit is segmented into multiple sub-light emitting units, each with corresponding fingerprint recognition units. This segmentation enables precise local alignment and improved fingerprint recognition precision while the integrated structure keeps overall complexity manageable.
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 configuration enhances the precision of fingerprint recognition by eliminating Moiré patterns and improving the alignment between light emitting and recognition units, resulting in more accurate fingerprint identification.
Implementation Method 1
controlling organic light emitting structures to emit light in a shifting mode according to a first light emitting dot array
Implementation Method 2
recognizing a fingerprint by a fingerprint recognition array based on light reflected by a touch object on a light emitting side of a glass cover to the fingerprint recognition array
Data Source
AI summary
A display panel and a display apparatus are provided. The display panel comprises an array substrate, a plurality of light emitting units disposed on the array substrate, each having a plurality of sub-light emitting units, and a plurality of fingerprint recognition units, configured to recognize fingerprints based on light reflected by a touch object to the fingerprint recognition units. Each fingerprint recognition unit is configured in coordination with at least one sub-light emitting unit. An orthogonal projection of each fingerprint recognition unit on the array substrate and an orthogonal projection of a corresponding sub-light emitting structure on the array substrate overlap with each other.