Optical Sensor Structure with Scattering Layer for Wide-Angle Detection
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Solution Overview
Problem
The increasing demand for multi-functional optical sensors has led to larger electronic devices due to the need for multiple optical sensors, which complicates their design and functionality, particularly in detecting ambient light and near-infrared rays effectively across various angles.
Innovation Solution
A structure comprising a support with a first optical filter layer and a light scattering layer on its light path, and a second optical filter layer on a different region without a light scattering layer, allowing for efficient detection of light across a wider incidence angle range, enabling multi-functionalization of optical sensors by utilizing different filter layers for various sensing functions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple optical sensors are incorporated to achieve multi-functional sensing, then sensor functionality is improved, but device size increases
Solution Approach 1:
The patent combines multiple optical sensor functions into a single integrated structure by stacking different optical filter layers (first optical filter layer with light scattering layer, and second optical filter layer without light scattering layer) on the same support, allowing multiple sensing functions to be achieved in one compact component rather than using separate sensors
Solution Approach 2:
The single optical sensor structure is designed to perform multiple sensing functions simultaneously by incorporating different optical filter layers with distinct characteristics, enabling the same device to detect various types of light (visible, near-infrared, ultraviolet) and perform different sensing tasks
2Adaptability or versatility
If a light scattering layer is added to widen the incidence angle range, then detection angle is improved, but light intensity is reduced due to scattering
Solution Approach 1:
The patent applies the light scattering layer selectively only to regions where wide-angle detection is needed (first optical filter layer), while leaving other regions (second optical filter layer) without scattering layer to maintain high light intensity for specific functions, thus optimizing performance locally rather than uniformly across the entire sensor
3Adaptability or versatility
If multiple optical filter layers are stacked to achieve multi-functional sensing, then sensor versatility is improved, but structural complexity increases
Solution Approach 1:
The patent divides the optical sensor into distinct functional segments (first optical filter layer with light scattering for wide-angle detection, second optical filter layer without scattering for specific wavelength detection), allowing each segment to be optimized independently while maintaining overall system simplicity through modular stacking on a common support
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 enhances the sensitivity and functionality of optical sensors by allowing the first optical filter layer to function as a sensor with a wider incidence angle range, while the second optical filter layer can be used for specific functions like color imaging or near-infrared detection, thereby reducing device size and improving performance.
Implementation Method 1
a light scattering layer provided on a light path of the first optical filter layer
Data Source
AI summary
A structure includes a support 10, a first optical filter layer 24 provided on the support, a light scattering layer 50 provided on the light path of the first optical filter layer 24, and a second optical filter layer 21, 22, 23, 25, and 26 provided on the support 10, on a different region from the region where the first optical filter layer is provided, and the light scattering layer 50 is not provided on the light path of the second optical filter layer.