Light Shielding Layer for Texture Recognition Apparatus
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Solution Overview
Problem
Existing texture recognition systems for mobile devices face challenges in optimizing fingerprint recognition accuracy due to interference from ambient light and strong light sources, leading to blurred or incomplete texture images.
Innovation Solution
A texture recognition apparatus comprising a light source array, an image sensor array, and a light shielding layer with strategically positioned openings that allow signal light to pass through while blocking ambient light and strong light, ensuring effective imaging and improving recognition accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a light shielding layer is added to block ambient light and strong light, then texture recognition accuracy is improved, but device complexity increases
Solution Approach 1:
A light shielding layer is introduced as an intermediary component between the image sensor array and the external environment. This layer selectively blocks ambient light and strong light while allowing signal light to pass through, thereby improving texture recognition accuracy without fundamentally changing the core imaging mechanism
Solution Approach 2:
The light shielding layer is segmented with multiple openings positioned at specific locations corresponding to the light source array. This segmentation allows the layer to selectively transmit signal light from specific directions while blocking light from other directions, achieving precise light control
2Measurement precision
If the light shielding layer blocks all ambient light, then imaging clarity is improved, but signal light transmission may be reduced
Solution Approach 1:
The light shielding layer exhibits different optical properties at different locations. The openings are strategically positioned to allow signal light transmission from the light source array direction, while other regions block ambient light. This local differentiation enables selective light transmission based on direction and source
3Illumination intensity
If the opening area in the light shielding layer is increased to allow more signal light, then light intensity is improved, but ambient light interference increases
Solution Approach 1:
The openings in the light shielding layer are asymmetrically positioned and sized according to the specific geometry of the light source array and image sensor array. This asymmetric design allows optimal signal light transmission while maintaining effective ambient light blocking, achieving a balance between light intensity and interference reduction
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 solution enhances the intensity of signal light and reduces interference from ambient and strong light sources, resulting in improved texture recognition accuracy and clarity of fingerprint images.
Implementation Method 1
the light shielding layer has at least one opening, and the at least one opening is configured to allow the light that is emitted from the plurality of light sources and reflected to the plurality of image sensors by the texture to pass through
Implementation Method 2
the at least one opening is configured to allow the light that is emitted from the plurality of light sources and reflected to the plurality of image sensors by the texture to pass through
Implementation Method 3
the plurality of image sensors are configured to receive light that is emitted from the plurality of light sources and reflected to the plurality of image sensors by a texture for texture image collection
Data Source
AI summary
A texture recognition apparatus and an opposite substrate are provided. The texture recognition apparatus includes a light source array, an image sensor array and a light shielding layer. The light source array includes a plurality of light sources; the image sensor array includes a plurality of image sensors, an orthographic projection of the light shielding layer on a plane where the light source array is located is between two adjacent light sources, an orthographic projection of the light shielding layer on a plane where the image sensor array is located at least partially overlaps with the plurality of image sensors; the light shielding layer has at least one opening, and at least a part of an orthographic projection of the first opening on the plane where the image sensor array is located is at least on one side of the first image sensor or overlaps with the first image sensor.