Light Reception Emission Module with Nested Light Receiving Elements
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Solution Overview
Problem
In light reception/emission element modules, monitoring the intensity of light emission in the light emitting portion is a challenge that existing technologies have not effectively addressed.
Innovation Solution
The module incorporates a first light receiving element positioned between the light emitting element and a second light receiving element, allowing for the monitoring of light emission intensity by receiving light emitted from the light emitting element and converting it into a current, while the second light receiving element detects reflected light from an object, with a housing and lens member optimizing light path and reducing external light interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a light receiving element is added to monitor light emission intensity, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The first light receiving element is designed to serve dual purposes: it monitors the light emission intensity of the light emitting element and also detects reflected light from the object. This multi-functionality approach allows the system to achieve accurate light emission monitoring without adding excessive complexity, as the same component performs multiple measurement tasks.
2Measurement precision
If multiple light receiving elements are arranged to monitor light emission, then measurement precision is improved, but the volume of the device increases
Solution Approach 1:
The light receiving elements are arranged in a nested configuration where the first light receiving element is positioned between the light emitting element and the second light receiving element. This nested arrangement allows multiple sensing functions to be compacted into a smaller volume, achieving accurate light emission monitoring without proportionally increasing the overall module size.
3Measurement precision
If the light receiving element is positioned close to the light emitting element for monitoring, then measurement precision is improved, but external light interference increases
Solution Approach 1:
A housing structure is introduced as an intermediary element that provides a controlled environment for the light emitting and light receiving elements. The housing includes light shielding portions that block external light from reaching the light receiving elements, thereby maintaining measurement precision while allowing the elements to be positioned in close proximity for effective monitoring.
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 enables accurate monitoring of light emission intensity, miniaturization of the module, and improved monitoring accuracy by reducing noise and external light interference, allowing for precise detection of object information such as position, distance, and density.
Implementation Method 1
a first light receiving element disposed in a region between the light emitting element and the second light receiving element
Data Source
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AI summary
A light reception/emission element module of the disclosure comprises a substrate, a light emitting element disposed on the substrate, a first light receiving device disposed on the substrate apart from the light emitting element, and an upper wall located above the substrate. The upper wall comprises a facing surface facing the light emitting element and the first light receiving element. The light reception/emission element module of the disclosure further comprises a second light emitting element disposed on the substrate. The upper wall further comprises a first light passing portion located above the light emitting element, a second light passing portion located above the second light receiving element, and an intermediate portion located in a region between the first light passing portion and the second light passing portion. At least part of a lower surface of the intermediate portion comprises the facing surface.