Display Panel Color Filter Aperture 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 a light-emitting display layer, a color filter layer with a light-blocking layer and color filters, and a metal part that overlaps the light-blocking layer, enhancing the imaging aperture and optical recognition accuracy without the need for additional light-blocking layers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a separate light-blocking layer is added to improve imaging effect and optical recognition accuracy, then the accuracy of fingerprint recognition is improved, but the device structure becomes more complex and the number of components increases
Solution Approach 1:
The patent combines the light-blocking function with the existing color filter layer by forming the light-blocking layer and imaging aperture directly on the color filter layer. This integration eliminates the need for a separate light-blocking layer, reducing device complexity while maintaining the imaging effect and optical recognition accuracy
Solution Approach 2:
The color filter layer is given multiple functions: it serves both as a color filter for display purposes and as a light-blocking layer with imaging aperture for fingerprint recognition. This multi-functionality reduces the total number of components while achieving both display quality and accurate fingerprint imaging
2Measurement precision
If additional light-blocking layers and components are added to enhance imaging effect, then the quality of imaging picture is improved, but the thickness of the display device increases
Solution Approach 1:
By merging the light-blocking function into the color filter layer, the patent eliminates additional layers that would increase thickness. The light-blocking layer is formed directly on the color filter layer, maintaining a compact structure while achieving high-quality imaging for fingerprint recognition
3Measurement precision
If more components are added to improve optical recognition accuracy, then the accuracy of optical recognition is improved, but the manufacturing process becomes more complex
Solution Approach 1:
The patent integrates the light-blocking layer formation with the existing color filter layer manufacturing process. The light-blocking layer is formed directly on the color filter layer using the same or compatible manufacturing techniques, avoiding the need for separate manufacturing steps and reducing overall process complexity
Solution Approach 2:
The color filter layer serves dual purposes: color filtering for display and light blocking with imaging aperture for fingerprint recognition. This multi-functionality simplifies the manufacturing process by eliminating the need to manufacture separate light-blocking components
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
This design improves the imaging effect, enhances picture quality, and increases the accuracy of optical recognition, allowing for thinner display devices without additional components.
Implementation Method 1
the color filter layer comprises a light-blocking layer and color filters, 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
Fingerprint detection is implemented by using a feature that is when certain semiconductor device is exposed to light, the device may generate a leakage current. Specifically, after light generated by a fingerprint recognition light source is reflected on a surface where a finger touches the display device, the reflected light hits the optical sensor and the optical sensor detects the light intensity
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.