Micro-Photoelectric Unit Layout for Accurate Under-Display Sensing
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Solution Overview
Problem
Current electronic devices using micro-photoelectric elements face challenges in achieving high accuracy detection rates for biometric identification and physiological parameter measurement, particularly in handling uneven textures and varying light conditions.
Innovation Solution
The electronic device comprises a first module with a pixel substrate and a second module with micro-photoelectric units and a protection layer, where the micro-photoelectric units are misaligned with the pixels to unshield them, allowing for flexible configuration of sensor and light-emitting elements, and a polarizer is used to enhance detection accuracy by optimizing the alignment and functionality of micro-photoelectric units.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If micro-photoelectric units are aligned with pixels in the stacking direction, then the display function is maintained, but the detection accuracy is reduced due to shielding of pixels
Solution Approach 1:
The patent transitions from a two-dimensional planar arrangement to a three-dimensional stacked configuration. The micro-photoelectric units are positioned in a second module stacked upon the first module containing pixels, allowing vertical separation that eliminates lateral shielding while maintaining functional alignment through the stacking direction.
Solution Approach 2:
The device is divided into distinct functional modules: a first module containing pixels and a second module containing micro-photoelectric units. This segmentation allows each module to perform its specific function independently while being optically coupled through the stacking arrangement, resolving the conflict between display and detection functions.
2Measurement precision
If micro-photoelectric units are misaligned to unshield pixels, then detection accuracy improves, but device complexity increases
Solution Approach 1:
The stacked module design creates a universal structure where the first module with pixels serves both display and optical reference functions, while the second module with misaligned micro-photoelectric units provides detection functionality. This multi-functional arrangement achieves detection accuracy improvement without proportionally increasing overall device complexity.
3Reliability
If shielding units are added around pixels, then pixel protection is improved, but detection function is hindered by additional shielding
Solution Approach 1:
The patent introduces a polarizer as an intermediary optical element between the pixels and micro-photoelectric units. This polarizer mediates the optical interaction, allowing the shielding units to protect pixels laterally while permitting controlled optical coupling in the stacking direction for detection purposes.
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 configuration improves detection accuracy and efficiency by allowing micro-photoelectric units to fill gaps between pixels without interfering with display or detection functions, enabling precise biometric identification and physiological parameter measurement.
Implementation Method 1
Each of the micro-photoelectric units comprises a micro-photoelectric element, and at least one of the micro-photoelectric elements is a sensor element
Implementation Method 2
an electronic device further comprises a polarizer configured in the second module
Data Source
AI summary
An electronic device includes a first module and a second module stacked upon the first module in a stacking direction. The first module includes a pixel substrate and a counter substrate disposed opposite to each other. The pixel substrate is defined with a plurality of pixels. The second module is disposed at one side of the first module adjacent to the counter substrate and away from the pixel substrate. The second module includes a plurality of micro-photoelectric units and a protection layer. The protection layer stacks upon the micro-photoelectric units and is disposed at one side of the second module away from the first module. Each of the micro-photoelectric units unshields one or more of the pixels in the stacking direction. Each micro-photoelectric unit includes a micro-photoelectric element, and at least one of the micro-photoelectric elements is a sensor element.