Optical Sensor Module With Inclined Side Plates
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Solution Overview
Problem
Wearable devices with light-emitting and photodetector components on the same plane face challenges in effectively detecting and analyzing light rays reflected from the user's skin due to inefficient light collection.
Innovation Solution
An optical sensor module design featuring a support unit with inclined side plates relative to a main plate, where the light-emitting units are positioned on the side plates and the photodetector is on the main plate, enhancing light collection efficiency by directing light rays towards the photodetector.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the light-emitting member and photodetector are disposed on the same plane, then the device structure is simple, but the light collection efficiency is low
Solution Approach 1:
The patent transitions from a two-dimensional planar arrangement to a three-dimensional configuration by inclining the side plates at a specific angle (e.g., 45 degrees) relative to the main plate. This dimensional change allows the light-emitting units on the inclined side plates to direct light rays at optimal angles toward the photodetector on the main plate, significantly improving light collection efficiency while maintaining reasonable structural complexity
2Measurement precision
If the light-emitting units are positioned on inclined side plates, then the light collection efficiency is improved, but the device structure becomes more complex
Solution Approach 1:
The support unit is segmented into distinct functional components: a main plate for mounting the photodetector and inclined side plates for mounting light-emitting units. This segmentation allows each component to be optimized independently for its specific function while assembling into an integrated structure that achieves both improved light collection and manageable complexity
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 increases the measurement efficiency and accuracy of the optical sensor module by ensuring that light emitted and reflected from the skin is effectively received by the photodetector, improving the detection of personal biological data.
Implementation Method 1
light rays emitted from the light-emitting member and reflected by the user's skin
Implementation Method 2
photodetector that is disposed on a top of the main plate and that has a light-receiving surface
Data Source
AI summary
An optical sensor module includes a support unit, a light-receiving unit and a light-emitting unit. The support unit includes a main plate, and a side plate inclined relative to the main plate. The light-receiving unit includes a photodetector disposed on the main plate and having a light-receiving surface located away from the main plate, and a light-blocking member covering part of the photodetector. The light-emitting unit emits light toward an imaginary line perpendicular to the light-receiving surface, and is disposed on the side plate. A wearable device including the optical sensor is also disclosed.