Texture Recognition Light Shielding Matrix for Ambient Light Interference
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Solution Overview
Problem
Existing texture recognition systems for mobile devices face challenges in effectively distinguishing between signal light and ambient light, leading to blurred or failed texture imaging during fingerprint recognition, due to the interference of ambient light and the difficulty in simultaneously blocking it while maintaining signal light intensity.
Innovation Solution
A texture recognition apparatus is designed with a light source array, an image sensor array, and a light shielding matrix, where the light shielding matrix is positioned on the light incident side of the image sensor array and comprises light shielding patterns that do not overlap with the light sources, allowing the image sensors to receive signal light while shielding ambient light, thereby improving texture collection efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a light shielding structure is added to block ambient light, then ambient light interference is reduced, but device complexity increases
Solution Approach 1:
The patent combines the light shielding function with the existing matrix structure by integrating light shielding patterns into the matrix, allowing the same structural element to serve both structural and optical shielding purposes, thereby reducing overall device complexity while maintaining effective ambient light blocking
Solution Approach 2:
The matrix structure is designed to perform multiple functions simultaneously: it provides structural support, enables light transmission for signal light, and blocks ambient light through integrated light shielding patterns, eliminating the need for separate dedicated shielding components
2Measurement precision
If light shielding patterns are positioned to block ambient light, then texture recognition accuracy is improved, but signal light intensity may be reduced
Solution Approach 1:
The light shielding patterns are selectively positioned in specific regions where they block ambient light while leaving other regions open to transmit signal light, creating spatially varying optical properties that simultaneously achieve both ambient light rejection and signal light preservation
Solution Approach 2:
The matrix is divided into multiple regions with different optical functions: some areas contain light shielding patterns to block ambient light, while other areas remain transparent to allow signal light transmission, enabling differentiated optical control across the structure
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 effectively prevents ambient light from interfering with the image sensor, ensuring the intensity of the signal light is maintained, resulting in improved texture recognition accuracy and effectiveness.
Implementation Method 1
a light shielding matrix, wherein the light shielding matrix is on a light incident side of the image sensor array, and includes a plurality of light shielding patterns arranged in an array
Implementation Method 2
each of the plurality of image sensors includes a photosensitive element; the plurality of image sensors are configured to be able to receive light emitted from the plurality of light sources and reflected by a texture
Data Source
AI summary
A texture recognition apparatus and an electronic apparatus are provided. The texture recognition apparatus has a touch side surface, and includes a light source array, an image sensor array and a light shielding matrix, the light source array includes a plurality of light sources; the image sensor array includes a plurality of image sensors, the plurality of image sensors are configured to receive light emitted from the plurality of light sources and reflected by a texture to the plurality of image sensors; the light shielding matrix includes a plurality of light shielding patterns arranged in an array, each of the plurality of image sensors includes a photosensitive element; the plurality of light sources do not overlap with the plurality of light shielding patterns, a photosensitive element of each of the plurality of image sensors at least partially overlaps with at least one or the plurality of light shielding patterns.