Display Panel Light-Blocking Layer for Optical Fingerprint Accuracy
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Solution Overview
Problem
The accuracy of fingerprint recognition in display devices based on optical fingerprint recognition technology needs to be improved.
Innovation Solution
A display panel design that includes a substrate with an array layer, a display layer with light-emitting elements, a color filter layer with a light-blocking layer and color filters, and first metal parts that overlap the light-blocking layer, enhancing the imaging effect and accuracy of optical recognition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a separate light-blocking layer is added to improve imaging effect, then the imaging quality improves, but the display panel thickness increases
Solution Approach 1:
The patent combines the light-blocking function with the color filter layer by making the color filter layer itself serve as the light-blocking layer. This merging eliminates the need for a separate light-blocking layer, thereby improving imaging quality without increasing panel thickness.
Solution Approach 2:
The color filter layer is designed to perform multiple functions: color filtering and light-blocking. By making the color filter layer universal, the patent eliminates the need for dedicated separate layers for each function, thus reducing overall structure thickness while maintaining imaging performance.
2Length of stationary object
If the display panel structure is simplified to reduce thickness, then the panel becomes thinner, but the imaging effect deteriorates
Solution Approach 1:
The patent merges the light-blocking function into the color filter layer, creating a unified structure that maintains imaging effectiveness while reducing the number of separate layers and overall thickness.
Solution Approach 2:
The color filter layer is designed with specific local properties to enhance light-blocking capability in critical areas. By optimizing the local quality of the color filter layer, the patent achieves effective light-blocking without requiring additional thickness throughout the entire panel.
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 proposed design improves the imaging effect, enhances the quality of the imaging picture, and increases the accuracy of optical recognition, while also allowing for a thinner display panel without the need for additional light-blocking layers.
Implementation Method 1
the light-blocking layer comprises first light-blocking part, and at least one light-transmitting aperture is disposed in the first light-blocking part
Implementation Method 2
the optical sensor detects the light intensity caused by the fluctuations of fingerprint valleys and peaks to generate a fingerprint image
Implementation Method 3
The display layer comprises light-emitting elements
Data Source
AI summary
Provided are a display panel and a display device. An array layer is located on a substrate. A display layer is located on a side of the array layer facing away from the substrate and includes light-emitting elements. A color filter layer is located on a side of the display layer facing away from the array layer. The color filter layer includes a light-blocking layer and color filters. The light-blocking layer includes first light-blocking part. At least one light-transmitting aperture is disposed in the first light-blocking part. First metal part overlaps the first light-blocking part. Further provided is a display device including the preceding display panel.