Fingerprint Module Light Filtering Component Thickness Gradient
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Solution Overview
Problem
Conventional fingerprint identification modules using OLED screens suffer from non-uniform light distribution on the optical sensor, leading to low quality equilibrium and a low success rate of fingerprint identification due to uneven light intensities across different areas.
Innovation Solution
A fingerprint identification module with a novel light filtering component that adjusts the propagation direction of light rays, featuring a thickness gradient from the edge to the central area, ensuring uniform light distribution on the optical sensor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a conventional light filtering component with uniform thickness is used, then the structure is simple and easy to manufacture, but the light distribution on the optical sensor is non-uniform, leading to low quality equilibrium
Solution Approach 1:
The light filtering component is designed with non-uniform thickness, where different regions have different thicknesses to compensate for the non-uniform light distribution. Specifically, the thickness varies from the central area to the edge area, creating local quality differences that balance the overall light intensity distribution across the optical sensor.
Solution Approach 2:
The patent changes the physical parameter of the light filtering component by introducing a thickness gradient. The thickness parameter varies continuously or stepwise from the central area toward the edge area, transforming the component from a uniform structure to a gradient structure that optimizes light distribution.
2Manufacturing precision
If the light filtering component has greater thickness at the edge area and smaller thickness at the central area, then the light distribution uniformity is improved, but the manufacturing precision requirement increases
Solution Approach 1:
The patent implements a thickness gradient parameter change in the light filtering component, where the thickness varies from the central area to the edge area. This parameter variation is designed to optimize light distribution while remaining manufacturable through standard fabrication techniques.
Solution Approach 2:
The light filtering component can be manufactured by segmenting the thickness variation into discrete steps or continuous gradients. The component may be divided into multiple regions with different thicknesses, each manufactured separately or as part of an integrated structure, making the complex thickness profile achievable through conventional manufacturing processes.
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
Improves the quality equilibrium of fingerprint images collected by the optical sensor, increasing the success rate of fingerprint identification by ensuring consistent light intensities across different areas.
Implementation Method 1
a light filtering component located between the lens and the optical sensor, the thickness of an edge area of the light filtering component is greater than the thickness of a central area of the light filtering component
Data Source
AI summary
A fingerprint identification module includes a lens, an optical sensor, and a light filtering component located between the lens and the optical sensor, where a thickness of an edge area of the light filtering component is greater than a thickness of a central area of the light filtering component, and a thickness of the light filtering component decreases gradually along a direction from the edge area to the central area.