Sensor-Embedded Display Panel for Multispectral Biometric Sensing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing display devices lack integration of biometric sensors that efficiently capture human biometric information while maintaining display functionality, and there is a need for improved manufacturing methods.
Innovation Solution
A sensor embedded display panel with integrated photoelectric elements that absorb and convert light into electrical signals, including separate layers for different wavelength spectra and a common auxiliary layer for light emitting elements, allowing for biometric sensing and display capabilities in a single device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a biometric sensor is integrated with a display panel, then biometric sensing capability is improved, but device complexity increases
Solution Approach 1:
The patent combines the sensor and display panel into a single integrated structure where the photoelectric element is formed within the display panel substrate. The sensor uses the same light emitting elements and auxiliary layers as the display, merging two previously separate components into one unified device that provides both display and biometric sensing functions
Solution Approach 2:
The display panel is designed to serve multiple functions: it acts as both a visual display device and a biometric sensor. The light emitting elements and auxiliary layers are configured to perform both display operations and photoelectric conversion for biometric authentication, eliminating the need for separate sensor components
2Measurement precision
If separate photoelectric elements are formed for each wavelength spectrum, then measurement precision is improved, but manufacturing complexity increases
Solution Approach 1:
The photoelectric element is divided into multiple sensor pixels, with each pixel dedicated to detecting a specific wavelength spectrum (red, green, or blue). This segmentation allows each pixel to be optimized for its specific wavelength while maintaining a unified structural framework that simplifies manufacturing
Solution Approach 2:
Different regions of the photoelectric element are designed with different characteristics: each sensor pixel has a light absorbing layer with specific optical properties tuned for its designated wavelength spectrum. The auxiliary layers and common structures remain uniform across all pixels, providing local optimization without compromising overall manufacturing simplicity
3Reliability
If the photoelectric element uses a thick light absorbing layer, then light absorption efficiency is improved, but device thickness increases
Solution Approach 1:
The patent optimizes the thickness of the light absorbing layer to achieve the minimum necessary for effective photoelectric conversion. By carefully selecting and tuning the thickness parameter, the design achieves high light absorption efficiency without requiring excessive material depth, thus maintaining a thin overall device profile
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 solution enables high-performance biometric sensing and display integration with improved manufacturing efficiency, providing thin and efficient biometric functionality in display devices.
Implementation Method 1
a photoelectric element on the substrate, the photoelectric element including a light absorbing layer... configured to absorb incident light of a combination of the red wavelength spectrum, the green wavelength spectrum, and the blue wavelength spectrum
Data Source
AI summary
A sensor embedded display panel includes a substrate, a light emitting element on the substrate and including an emission layer; and a photoelectric element on the substrate. The photoelectric element includes a light absorbing layer. The light absorbing layer at least partially overlaps the emission layer in a horizontal direction extending in parallel to an upper surface of the substrate. The light emitting element and the photoelectric element each include a separate portion of a first common auxiliary layer that extends on tops of the emission layer and the light absorbing layer and a separate portion of a second common auxiliary layer that extends on bottoms of the emission layer and the light absorbing layer. The photoelectric element further includes an auxiliary layer that has a thickness corresponding to one of a red wavelength spectrum, a green wavelength spectrum, or a blue wavelength spectrum.