Optoelectronic Receiver Layout With Opaque Light Isolation
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Solution Overview
Problem
Existing optoelectronic devices face challenges in effectively isolating the receiver from direct light emission, leading to potential measurement disturbances and inefficient use of surface area.
Innovation Solution
The design incorporates an opaque conductive layer extending above the emitter with a transparent block and a conductive strip, ensuring the receiver is positioned to avoid direct light emission while being electrically coupled, and uses filters to control wavelength transmission, with manufacturing involving resin molding and precise structural formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the receiver is positioned close to the emitter for compact design, then device integration is improved, but direct light from the emitter may reach the receiver causing measurement disturbances
Solution Approach 1:
The device is segmented into distinct functional zones: the emitter is positioned at a first location while the receiver is positioned at a second location separated by an opaque layer. This spatial segmentation prevents direct light paths while maintaining compact overall device volume, resolving the contradiction between integration and measurement accuracy.
Solution Approach 2:
An opaque layer is introduced as an intermediary element between the emitter and receiver. This intermediate structure blocks direct light transmission from the emitter to the receiver, enabling close positioning while preventing measurement disturbances caused by direct light exposure.
2Measurement precision
If an opaque layer is introduced to block direct light, then measurement accuracy is improved, but device complexity increases
Solution Approach 1:
The opaque layer is merged with existing device structures such as substrates, housing, or support elements. By combining the light-blocking function with existing structural components rather than adding separate dedicated elements, the solution improves measurement accuracy while minimizing increases in device complexity.
Solution Approach 2:
The opaque layer serves multiple functions simultaneously: it blocks direct light from reaching the receiver, provides structural support, and may serve as a mounting surface for other components. This multi-functionality reduces overall device complexity while achieving the light-blocking objective.
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 effectively prevents direct light from reaching the receiver, enhancing measurement accuracy and reducing surface area usage, thereby improving the performance and efficiency of optoelectronic devices like time-of-flight sensors.
Implementation Method 1
the receiver being located on a layer opaque to the wavelengths of the rays capable of being emitted by the emitter
Implementation Method 2
the opaque layer is made of a conductive material electrically coupling the receiver to a node of application of a voltage
Data Source
AI summary
An optoelectronic device includes an emitter of light rays and a receiver of light rays. The emitter is encapsulated in a transparent block. An opaque conductive layer is applied to a top surface and a side surface of the transparent block. The receiver is mounted to the opaque conductive layer at the top surface. An electrical connection is made between the receiver and the opaque conductive layer. A conductive strip is also mounted to the side surface of the transparent block and isolated from the opaque conductive layer. A further electrical connection is made between the receiver and the conductive strip.