Array Substrate Light-Shielding Structure for Optical Fingerprint Accuracy
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Solution Overview
Problem
Existing fingerprint recognition technologies in display areas face accuracy degradation due to crosstalk light interference, which affects the performance of optical fingerprint recognition systems.
Innovation Solution
An array substrate design featuring a light-shielding structure with multiple sections, formed by different fabrication processes, surrounds the light-sensitive structure to block crosstalk light, improving recognition accuracy and simplifying the fabrication process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a light-shielding structure is added to block crosstalk light, then fingerprint recognition accuracy is improved, but device complexity increases
Solution Approach 1:
The light-shielding structure is divided into multiple sections (first light-shielding section, second light-shielding section, third light-shielding section) formed by different fabrication processes. Each section targets specific directions of crosstalk light, providing effective shielding while maintaining manufacturing feasibility through segmented construction.
Solution Approach 2:
Different sections of the light-shielding structure are formed using different fabrication processes tailored to their specific requirements. The first section uses a first fabrication process, the second section uses a second fabrication process, and the third section uses a third fabrication process, optimizing each local region for its specific function.
2Adaptability or versatility
If multiple fabrication processes are used for light-shielding sections, then manufacturing flexibility is improved, but manufacturing precision may deteriorate
Solution Approach 1:
The light-shielding structure is segmented into multiple sections, each formed by a dedicated fabrication process. This segmentation allows each process to be optimized for its specific section while maintaining overall structural integrity and alignment through the layered construction approach.
Solution Approach 2:
The patent employs a multi-layered vertical structure with light-shielding sections at different heights and positions. By utilizing the vertical dimension and spatial arrangement, multiple fabrication processes can be applied to different sections without compromising overall precision, as each section serves a specific directional shielding function.
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-shielding structure effectively prevents crosstalk light interference, enhancing fingerprint recognition accuracy and reducing fabrication complexities, thereby improving the production yield of the array substrate.
Implementation Method 1
a light-shielding structure, disposed between the first light-shielding layer and the second light-shielding layer. The orthogonal projection of the light-shielding structure on the base substrate surrounds the orthogonal projection of the light-sensitive structure on the base substrate
Implementation Method 2
the optical fingerprint recognition technology generally uses a photodiode as a light-sensitive structure, and the operation principle of the optical fingerprint recognition technology is: the incident light is reflected by a touch object, and the reflection light is then irradiated onto the photodiode, causing the photodiode to generate a photocurrent
Data Source
AI summary
The present disclosure provides an array substrate, a display panel, and a display device. The array substrate includes a base substrate; a first light-shielding layer, disposed on a side of the base substrate; a light-sensitive structure, disposed on the side of the first light-shielding layer away from the base substrate; a second light-shielding layer, disposed on the side of the light-sensitive structure facing away from the base substrate; and a light-shielding structure, disposed between the first light-shielding layer and the second light-shielding layer. The orthogonal projection of the light-shielding structure surrounds the orthogonal projection of the light-sensitive structure. In the direction perpendicular to the base substrate, the light-shielding structure includes a first light-shielding section and a second light-shielding section. The first light-shielding section is disposed close to the first light-shielding layer, and the first light-shielding section and the second light-shielding section are formed by different fabrication processes.