Insulating Light Shielding Layer With Transmission Holes For Under-Screen Fingerprint
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current display technologies face challenges in integrating fingerprint recognition into display substrates without compromising the full-screen design, while ensuring water, oil, and dust resistance, and maintaining efficient manufacturing processes.
Innovation Solution
A display substrate with a light shielding layer made of insulating material, featuring light transmission holes for fingerprint imaging, and fingerprint acquisition devices, integrated with an electrode layer and luminescent materials, allowing for under-screen fingerprint recognition and simplifying the manufacturing process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a light shielding layer is added to the display substrate for fingerprint recognition, then fingerprint recognition capability is improved, but the number of manufacturing steps increases
Solution Approach 1:
The patent combines the light shielding layer with the encapsulation structure by using the same encapsulation layers (first and second encapsulation layers) to serve dual purposes: protecting the organic light-emitting layer and providing light shielding for fingerprint recognition. This merging eliminates the need for separate light shielding layers and reduces manufacturing complexity.
Solution Approach 2:
The encapsulation layers are designed to perform multiple functions simultaneously: they encapsulate and protect the organic light-emitting layer from environmental factors (water, oxygen) and simultaneously act as light shielding layers for the fingerprint recognition function. This multi-functionality reduces the total number of layers and manufacturing steps.
2Reliability
If multiple separate layers are used for light shielding and encapsulation, then protection performance is improved, but water, oil, and dust resistance deteriorates
Solution Approach 1:
The patent merges the encapsulation function and light shielding function into the same layers (first and second encapsulation layers). These encapsulation layers form a continuous protective barrier that prevents water, oil, and dust penetration while simultaneously providing light shielding for fingerprint recognition, achieving both protection performance and resistance to harmful factors.
Solution Approach 2:
The encapsulation layers are formed using composite material structures that provide both protective properties (water, oil, dust resistance) and optical properties (light shielding). The use of appropriate materials with combined functionalities ensures that the same layers deliver both protection performance and resistance to environmental contaminants.
3Area of stationary object
If the frame size is reduced for full-screen design, then display area is improved, but structural support capability worsens
Solution Approach 1:
The patent employs thin film encapsulation layers that provide structural support and protection while maintaining a minimal thickness profile. These flexible thin films enable the display to achieve full-screen design with reduced frame size while still providing adequate structural support and environmental protection through their continuous barrier properties.
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
Enables effective fingerprint recognition, reduces the number of manufacturing steps, and enhances the display substrate's resistance to water, oil, and dust, allowing for a full-screen design with reduced frame size.
Implementation Method 1
The material of the light shielding layer is an insulating material... configured to shield light
Implementation Method 2
A portion of the light shielding layer located in the fingerprint recognition region is provided with a plurality of light transmission holes, and each of the plurality of light transmission holes is configured to provide a transmission channel for fingerprint imaging light
Implementation Method 3
each fingerprint acquisition device is configured to collect the fingerprint imaging light transmitting through at least one corresponding light transmission hole
Data Source
AI summary
A display substrate having a fingerprint recognition region includes an array substrate, and a light shielding layer disposed at a side of the array substrate and at least located in the fingerprint recognition region. The material of the light shielding layer is an insulating material. A portion of the light shielding layer located in the fingerprint recognition region is provided with a plurality of light transmission holes, and each of the plurality of light transmission holes is configured to provide a transmission channel for fingerprint imaging light.