Optoelectronic Sensor Layout With Dual Dams for Light Noise Blocking
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Solution Overview
Problem
Existing optical physiological sensors are large in size due to plastic housings and struggle with glue control, leading to noise interference and reduced accuracy.
Innovation Solution
A miniaturized optoelectronic device design featuring a substrate with a sensing element, light emitting element, first dam, and second dam, where the first dam covers the sensing element and the second dam is on top of the first dam, forming a light-blocking structure to reduce noise interference and improve light reception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a plastic housing and filter are used to cover the sensing element and light emitting element, then light filtering effect is achieved, but the device size becomes large
Solution Approach 1:
The patent extracts and removes the plastic housing and separate filter components from the device structure. Instead, it uses the substrate itself as the mounting base and integrates light blocking functionality directly into the arrangement of components on the substrate, eliminating the need for additional housing and filter elements.
Solution Approach 2:
The patent merges the functions of housing, filtering, and component mounting into a single integrated structure. The substrate serves multiple purposes: mounting the sensing and light emitting elements, providing structural support, and enabling light blocking through strategic component placement, thereby combining what were previously separate functions into one unified system.
2Object-affected harmful factors
If a plastic housing with filter is used, then light filtering is achieved, but the device structure becomes complex and height increases
Solution Approach 1:
The patent removes the plastic housing and separate filter from the device structure, extracting these components entirely. The light blocking function is achieved through the spatial arrangement of components on the substrate rather than through dedicated filtering structures, thereby simplifying the overall device architecture.
Solution Approach 2:
The substrate is designed to perform multiple functions simultaneously: serving as the mounting platform for both the sensing element and light emitting element, providing structural support, and enabling light blocking through component placement. This multi-functional design eliminates the need for separate housing and filter components.
3Ease of manufacture
If glue is used to fix the plastic housing to the substrate, then housing attachment is achieved, but glue overflow and housing shift occur
Solution Approach 1:
The patent extracts and removes the plastic housing from the device structure entirely. Since there is no housing to attach, the glue application problem is eliminated. The light blocking function that the housing previously provided is achieved through the arrangement of components directly on the substrate.
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 design enhances signal-to-noise ratio and miniaturizes the device, improving light receiving performance and reducing noise interference by over 20% while decreasing the device height by more than 20%.
Implementation Method 1
The first dam and the second dam are located between the sensing element and the light emitting element
Data Source
AI summary
An optoelectronic device includes a substrate, a sensing element, a light emitting element, a first dam, and a second dam. The sensing element and the light emitting element are disposed on the substrate. The first dam is disposed on the substrate and covers a side of the sensing element. The second dam is disposed on the first dam. The first dam and the second dam are located between the sensing element and the light emitting element.