Optical Detection Device With Curved Housing For Compact Biological Sensing
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Solution Overview
Problem
Existing detection devices face challenges in reducing size while maintaining the intensity of light received from biological information, often due to the size and number of components, which can lead to decreased photoelectric efficiency and increased noise.
Innovation Solution
The detection device incorporates a substrate with a first light emitting unit, a first light receiving unit, and optical members, where the first optical member covers the light emitting unit and the second optical member covers the light receiving unit, with a gap between them, optimizing the distance to enhance light reception and reduce noise, allowing for a smaller device size without compromising light intensity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a light transmitting plate with convexly curved surface is added to improve adhesion and increase received light, then the amount of received light is improved, but the device size and number of components increase
Solution Approach 1:
The patent merges the light transmitting plate function into the housing structure by forming an optical member with a convexly curved surface that protrudes from the housing. This integrates the light transmission function with the structural housing, eliminating the need for separate components while maintaining the convex surface geometry needed for improved light reception and adhesion.
Solution Approach 2:
The housing structure is designed to serve multiple functions: it provides mechanical support, contains the light emitting and receiving units, and simultaneously acts as a light transmitting component with a convexly curved surface. This multi-functional design reduces the overall number of components needed in the device.
2Volume of moving object
If the distance between light emitting unit and light receiving unit is reduced to decrease device size, then the device size is reduced, but the amount of received light decreases
Solution Approach 1:
The patent positions the light emitting unit and light receiving unit on opposite sides of the substrate in the third direction (depth dimension), rather than only in the second direction (lateral dimension). This three-dimensional arrangement allows for compact lateral footprint while maintaining adequate optical path length for sufficient light reception.
Solution Approach 2:
The optical member is designed with a convexly curved surface that protrudes from the housing. This curved geometry helps focus and direct light toward the light receiving unit, improving the amount of received light even when the units are positioned close together in a compact configuration.
3Volume of moving object
If the distance between light emitting unit and light receiving unit is reduced to achieve compact size, then device size is reduced, but photoelectric efficiency decreases and noise increases
Solution Approach 1:
By arranging the light emitting and receiving units on opposite sides of the substrate in the depth dimension, the patent achieves compact lateral size while maintaining sufficient optical path length. This three-dimensional configuration preserves photoelectric efficiency and reduces noise despite the reduced overall device volume.
Solution Approach 2:
The convexly curved optical member surface helps concentrate and direct light toward the receiving unit, improving the signal strength and photoelectric efficiency even in a compact configuration where the units are positioned close together.
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 amount of light received by the light receiving unit, improves photoelectric efficiency, and reduces noise, enabling a compact detection device that effectively detects biological information without a decrease in performance.
Implementation Method 1
a first light emitting unit that emits first light and is provided at the substrate
Implementation Method 2
a first optical member that transmits the first light and covers the first light emitting unit at the substrate, a second optical member that transmits the first light and covers the first light receiving unit at the substrate
Implementation Method 3
a first light receiving unit that receives the first light and is provided, when viewed in a first direction parallel to the substrate, at the substrate side by side with the first light emitting unit in a second direction orthogonal to the first direction among directions parallel to the substrate
Data Source
AI summary
A detection device including a substrate, a first light emitting unit that emits first light, a first light receiving unit that receives the first light, a first optical member that transmits the first light and covers the first light emitting unit at the substrate, a second optical member that transmits the first light and covers the first light receiving unit at the substrate, and an accommodating member that is provided at the substrate and formed with a first opening accommodating the first light emitting unit and the first optical member and a second opening accommodating the first light receiving unit and the second optical member, the accommodating member includes a wall portion provided between the first optical member and the second optical member, and a first distance from the first light emitting unit to the wall portion is a distance that satisfies a predetermined condition.