Reflective Structure Segmentation for Photoelectric Detection Crosstalk
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Solution Overview
Problem
Existing photoelectric detection devices suffer from crosstalk among detection signals due to obliquely incident light entering adjacent pixel regions after being reflected by the high reflectivity reflective layer, affecting detection accuracy.
Innovation Solution
A photoelectric detection device with a reflective structure comprising a pixel reflective portion and an interval reflective portion, where the interval reflective portion is configured to reflect light back to the pixel conversion portion, preventing light from entering adjacent pixel regions and improving detection accuracy by using a substrate with a reflective film layer and protrusions to form inclined or curved reflective surfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a high reflectivity reflective layer is used to improve light utilization, then light reflection efficiency is improved, but signal crosstalk between adjacent pixel regions increases
Solution Approach 1:
The reflective layer is segmented into pixel reflective portions and interval reflective portions. The pixel reflective portions are positioned within pixel regions to reflect light back to corresponding photoelectric conversion portions, while interval reflective portions are positioned between pixel regions to block and absorb oblique light, preventing it from entering adjacent pixels. This segmentation resolves the contradiction by maintaining high light utilization through reflection while eliminating signal crosstalk through strategic positioning and functional division of the reflective layer.
Solution Approach 2:
Different regions of the reflective layer are assigned different functions: pixel reflective portions have high reflectivity to maximize light return to photoelectric conversion portions, while interval reflective portions have light-absorbing properties to prevent crosstalk. This local differentiation of optical properties allows the system to simultaneously achieve high light utilization and eliminate harmful signal interference between adjacent pixels.
2Use of energy by moving object
If oblique light reflection is allowed to improve light collection, then light utilization is improved, but detection precision decreases due to light entering wrong pixel regions
Solution Approach 1:
The reflective layer is divided into pixel reflective portions and interval reflective portions with distinct functions. Pixel reflective portions collect and reflect oblique light back to their corresponding photoelectric conversion portions, improving light collection efficiency. Interval reflective portions positioned between pixels absorb oblique light that might otherwise enter wrong pixel regions, thereby maintaining detection accuracy. This segmentation allows the system to simultaneously achieve both improved light collection and maintained detection precision.
Solution Approach 2:
The interval reflective portions convert the potentially harmful effect of oblique light (which could cause crosstalk and reduce detection accuracy) into a beneficial effect by absorbing this light and preventing it from entering adjacent pixel regions. This transforms what would be a harmful factor into a protective mechanism that maintains detection precision while allowing pixel reflective portions to efficiently collect and utilize light.
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 solution effectively prevents signal interference among different pixel regions, enhancing detection accuracy and light utilization by reflecting obliquely incident light back to its original pixel region, thus improving the overall detection efficiency.
Implementation Method 1
the second reflective portion is configured to reflect light directed to the second reflective portion from the first photoelectric conversion portion back to the first photoelectric conversion portion
Data Source
AI summary
The present disclosure provides a photoelectric detection device and a photoelectric detection apparatus. The photoelectric detection device includes a substrate, a reflective structure provided on the substrate and a photoelectric conversion layer provided on the reflective structure, and has a plurality of pixel regions and a plurality of interval regions each provided between two adjacent pixel regions. The photoelectric conversion layer includes a pixel photoelectric conversion portion in the pixel region; the reflective structure includes a pixel reflective portion in the pixel region and an interval reflective portion in the interval region, and the interval reflective portion is configured to reflect light directed to the interval reflective portion from the pixel photoelectric conversion portion back to the pixel photoelectric conversion portion.