Photoelectric Sensor Wall Structure for Crosstalk Isolation
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Solution Overview
Problem
Photoelectric sensors face accuracy issues due to interference between light signals, leading to reduced reliability in signal output, as reflected light from one sensing element can affect adjacent elements during the conversion process.
Innovation Solution
A photoelectric sensor design incorporating a wall structure with a light-blocking material, where the first and second layers are stacked with the second layer formed before the first, positioned between adjacent sensing elements to block reflected light, ensuring accurate signal transmission without interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If photoelectric sensing elements are arranged closely to increase detection coverage, then the area of detection is improved, but light signal interference between adjacent elements increases
Solution Approach 1:
The patent divides the photoelectric sensor array into isolated sensing units by introducing wall structures between adjacent photoelectric sensing elements. These walls segment the optical paths, preventing light from one element from interfering with adjacent elements, thus enabling closer arrangement while maintaining signal integrity.
Solution Approach 2:
The wall structure acts as an intermediary element positioned between adjacent photoelectric sensing elements. This intermediary structure blocks and isolates light signals, preventing direct optical interference between neighboring elements while allowing each element to function independently.
2Measurement precision
If wall structures are added between adjacent sensing elements to block light interference, then signal accuracy is improved, but device complexity increases
Solution Approach 1:
The patent merges the wall structure with existing sensor components by forming the wall from the same material layers as the photoelectric sensing elements themselves. This integration approach adds light-blocking functionality without requiring separate manufacturing processes or additional structural components, thus minimizing increased complexity.
Solution Approach 2:
The wall structure serves multiple functions: it acts as a light-blocking barrier between adjacent elements, provides structural support for the sensor array, and can be formed using the same material deposition processes as the sensing elements. This multi-functionality reduces the need for additional specialized components.
3Object-affected harmful factors
If wall structures are formed as separate components to block light interference, then light-blocking effectiveness is improved, but manufacturing complexity increases
Solution Approach 1:
The wall structure is formed integrally with the photoelectric sensing elements using the same material layers and deposition processes. The wall is created as part of the standard sensor fabrication sequence, eliminating the need for separate manufacturing and assembly steps for the light-blocking structures.
Solution Approach 2:
The wall structure is formed during the initial fabrication stages of the photoelectric sensor, before final assembly. By incorporating the light-blocking walls into the base substrate formation process, the patent ensures that light interference prevention is built-in from the outset, avoiding later manufacturing complications.
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 light-blocking wall structure effectively prevents crosstalk between adjacent photoelectric sensing elements, enhancing the accuracy and reliability of the signal output while simplifying the fabrication process and reducing costs by integrating the wall structure layers with the sensing element layers.
Implementation Method 1
The first layer is arranged at a side of the second layer away from the substrate and includes a light-blocking material
Implementation Method 2
photoelectric sensors convert a received light signal to an electrical signal and then output the electrical signal
Data Source
AI summary
Provided are a photoelectric sensor and an electronic device. The photoelectric sensor includes a substrate, a plurality of photoelectric sensing elements, and a wall structure between two adjacent photoelectric sensing elements. The wall structure includes a first layer and a second layer stacked with the first layer. The first layer is arranged at a side of the second layer away from the substrate and includes a light-blocking material. At least one of the first layer or the second layer of the wall structure is arranged in a same layer as at least one layer of the photoelectric sensing element.