Sensing Device with Patterned Liquid Crystal Polymer Layer
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Solution Overview
Problem
Conventional sensing devices require frequent changes between right-handed and left-handed circular polarizers or linear polarizers with different directions to perform full analysis, which is impractical for applications like under-display or reflective surface noise improvement, necessitating a polarizer with high extinction ratio.
Innovation Solution
A sensing device comprising a sensor, a reflective polarizer, a dye-doped polymeric layer, and a patterned liquid crystal polymer layer, where the reflective polarizer is a wire grid or cholesteric liquid crystal polymer, and the patterned liquid crystal polymer layer serves as a half or quarter waveplate with multiple regions of different optical axis directions, enhancing polarization control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single type polarizer is used, then the device structure is simple, but it cannot perform full polarization analysis
Solution Approach 1:
The patent combines multiple polarizer functions (right-handed circular polarizer, left-handed circular polarizer, and linear polarizers with different directions) into a single integrated patterned polarizer structure that can perform full polarization analysis simultaneously, eliminating the need for frequent polarizer changes
Solution Approach 2:
The patterned polarizer is designed to perform multiple polarization analysis functions (detecting different polarization states) within a single device configuration, making it universally applicable for comprehensive optical information capture without requiring multiple separate polarizers
2Measurement precision
If polarizers are changed frequently, then full polarization analysis can be achieved, but it is impractical for under display or reflective surface applications
Solution Approach 1:
The patterned polarizer is pre-configured with multiple polarization analysis regions (including right-handed circular, left-handed circular, and linear polarizer patterns) that can simultaneously detect different polarization states, eliminating the need for frequent manual changes during operation
3Adaptability or versatility
If multiple polarizer types are integrated, then full polarization analysis is achieved, but the device complexity increases
Solution Approach 1:
The polarizer is segmented into distinct patterned regions, each with specific polarization characteristics (right-handed circular, left-handed circular, linear orientations), allowing comprehensive polarization analysis through spatial segmentation rather than temporal switching
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 device achieves a high extinction ratio by effectively filtering undesired polarization light, improving noise reduction and analysis capabilities without the need for frequent polarizer changes.
Implementation Method 1
a reflective polarizer disposed on the sensor
Implementation Method 2
reflective polarizer
Implementation Method 3
a dye-doped polymeric layer disposed on the reflective polarizer
Implementation Method 4
a patterned liquid crystal polymer layer disposed on the dye-doped polymeric layer
Implementation Method 5
serves as a half waveplate or a quarter waveplate
Implementation Method 6
the reflective polarizer is a wire grid polarizer
Implementation Method 7
the reflective polarizer includes a cholesteric liquid crystal polymer layer
Data Source
AI summary
A sensing device includes a sensor, a reflective polarizer disposed on the sensor, a dye-doped polymeric layer disposed on the reflective polarizer, and a patterned liquid crystal polymer layer disposed on the dye-doped polymeric layer.