Display Panel Light-Shielding Layout for Accurate Fingerprint Detection
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Solution Overview
Problem
Existing display devices with fingerprint recognition technology suffer from accuracy issues due to interference light and light leakage, which affect the precision of light-sensing detection.
Innovation Solution
A display panel design incorporating a first light-shielding layer with openings and a device layer featuring light-transmitting regions, along with an auxiliary light-shielding part to block interference light, ensuring uniform light transmission and improving detection accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If light-transmitting regions are provided in the device layer for light-sensing detection, then fingerprint recognition function is enabled, but light leakage and interference light occur that reduce detection accuracy
Solution Approach 1:
The device layer is divided into multiple light-transmitting regions and light-shielding regions, creating a patterned structure that allows light to pass through specific areas while blocking other areas. This segmentation enables the light sensor to receive light only from intended paths, reducing interference light and improving detection accuracy while maintaining fingerprint recognition functionality
Solution Approach 2:
Different regions of the device layer are assigned different optical properties: light-transmitting regions allow light passage for sensing, while light-shielding regions block light to prevent interference. This local differentiation of optical quality enables the structure to simultaneously achieve fingerprint recognition capability and high detection accuracy by controlling light behavior in specific locations
2Measurement precision
If a light-shielding layer is added to block interference light, then detection accuracy is improved, but device complexity increases
Solution Approach 1:
The light-shielding function is merged with the device layer structure itself by creating integrated light-transmitting and light-shielding regions within the same layer. This combination eliminates the need for separate light-shielding layers, reducing overall device complexity while maintaining the ability to block interference light and improve detection accuracy
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 design enhances the accuracy of light-sensing detection by minimizing light leakage and interference, thereby improving the precision of fingerprint recognition.
Implementation Method 1
The light sensor may detect light intensity caused by fluctuation of fingerprint valleys and peaks, thereby generating a fingerprint spectrum
Data Source
AI summary
A display panel and a display device are provided. The display panel includes a first light-shielding layer including at least one first opening, and a device layer including a plurality of light-transmitting regions. The plurality of light-transmitting regions includes a first light-transmitting region and a second light-transmitting region, the first light-transmitting area overlaps at least one of the at least one first opening, and the second light-transmitting area overlaps a portion of the first light-shielding layer except the at least one first opening. The display panel also includes an auxiliary light-shielding part, overlapping the second light-transmitting area.