Under-screen Fingerprint Light Path Adjustment via Optical Fiber and Convex Lens
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Solution Overview
Problem
In under-screen optical fingerprint recognition technology, the large angle of divergence of light emitted from the screen leads to poor separation of light spots from fingerprint peaks and valleys, resulting in decreased recognition ability.
Innovation Solution
Incorporating light path adjustment devices with optical fiber and convex lens structures between the packaging cover plate and the fingerprint recognition component to reduce the angle of divergence of incident light, allowing for clearer light spot separation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If light is emitted from the screen for under-screen fingerprint recognition, then fingerprint recognition can be implemented, but the large angle of divergence of light leads to poor separation of light spots from fingerprint peaks and valleys
Solution Approach 1:
The patent introduces a light path adjustment device as an intermediary component between the screen and the fingerprint sensor. This device includes optical elements that modify the light path to reduce the angle of divergence, thereby improving light spot separation precision without compromising fingerprint recognition capability
Solution Approach 2:
The patent changes the optical parameters of the light path by introducing optical elements that alter the divergence angle of light. By adjusting the light path parameters through these optical components, the system achieves better light spot separation while maintaining the fingerprint recognition function
2Measurement precision
If light path adjustment devices are added to reduce the angle of divergence, then recognition accuracy is improved, but device complexity increases
Solution Approach 1:
The light path adjustment device is designed to serve multiple functions: it reduces the angle of divergence, adjusts the light path, and works with existing screen and sensor components. This multi-functionality approach improves precision without proportionally increasing complexity
Solution Approach 2:
The optical elements are integrated into the existing display structure, with the light path adjustment device nested between the screen and the fingerprint sensor. This nesting approach incorporates the additional components within the existing device footprint, minimizing the increase in overall complexity
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 light path adjustment devices effectively reduce the angle of divergence of light entering the fingerprint recognition component, enhancing the ability to distinguish between fingerprint peaks and valleys and thereby improving recognition accuracy.
Implementation Method 1
Each of the light path adjustment devices includes an optical fiber structure and a convex lens structure, which are disposed opposite each other... configured to adjust incident light reflected by a finger so as to reduce an angle of divergence of light entering the fingerprint recognition component
Implementation Method 2
Each of the light path adjustment devices includes an optical fiber structure and a convex lens structure, which are disposed opposite each other
Data Source
AI summary
The embodiments of the present disclosure provide a display panel, a display device, and a method for manufacturing the display panel. The display panel comprises: a display module comprising a fingerprint recognition component; a packaging cover plate located on a light emergent side of the display module; and a plurality of light path adjustment devices located between the packaging cover plate and the fingerprint recognition component, wherein each of the light path adjustment devices comprises an optical fiber structure and a convex lens structure, which are arranged opposite each other, with the convex lens structure being located on the side of the optical fiber structure that is away from the packaging cover plate; and the light path adjustment devices are configured to adjust incident light reflected by a finger so as to reduce the angle of divergence of light entering the fingerprint recognition component.