Identification-Coded Photosensor Correction for Stable Detection
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Solution Overview
Problem
Existing detection systems face variations in detection accuracy due to inconsistent characteristics among photoelectric conversion elements, leading to reduced performance across devices.
Innovation Solution
A detection system with a sensor comprising photosensors, a controller, and data storage for correction value data, which corrects detection values using identification codes associated with correction values.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If photoelectric conversion elements are used for detection, then detection capability is provided, but variation in characteristics among elements causes reduction in detection accuracy
Solution Approach 1:
The patent applies preliminary action by measuring and storing correction values for each photoelectric conversion element before actual detection operations. During manufacturing or initialization, the system characterizes each element's response to known light inputs and stores these as correction values in a lookup table. When detection is performed, the pre-computed correction values are retrieved and applied to compensate for individual element variations, thereby maintaining high detection accuracy without requiring real-time calibration.
Solution Approach 2:
The patent implements parameter changes by transforming raw detection values into corrected detection values using stored correction values. The system adjusts the output parameters of photoelectric conversion elements based on their individually measured characteristics, effectively normalizing the response across all elements. This parameter transformation compensates for manufacturing variations and ensures consistent detection accuracy across different devices and elements.
2Measurement precision
If correction value data is stored for each sensor, then detection accuracy is improved, but data storage requirements and system complexity increase
Solution Approach 1:
The patent applies segmentation by dividing the correction data management into element-level individual correction values stored in lookup tables. Each photoelectric conversion element has its own correction value entry, allowing independent compensation without affecting other elements. This segmented approach enables precise correction while maintaining modular data structure that simplifies storage and retrieval operations compared to comprehensive system-wide calibration matrices.
Solution Approach 2:
The patent uses copying by creating a digital representation (lookup table) of each element's correction characteristics during manufacturing. Instead of performing complex real-time calculations to compensate for element variations, the system creates simplified correction value copies that can be quickly retrieved and applied during detection. This copying approach reduces computational complexity while maintaining correction effectiveness.
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 system stabilizes detection accuracy by accounting for variations in photoelectric conversion element characteristics, enhancing consistency across devices.
Implementation Method 1
a plurality of photoelectric conversion elements such as photodiodes are arranged on a semiconductor substrate
Data Source
AI summary
According to an aspect, a detection system includes: a sensor provided with a plurality of photosensors in a detection area; a controller configured to control the sensor; and a data storage configured to store correction value data including correction values for detection values of the photosensors and identification codes of a plurality of the sensors in such a manner that the identification codes are associated one-to-one with the correction value data. The controller is configured to acquire the correction value data corresponding to the identification code of the sensor from the data storage and correct the detection values of the photosensors based on the acquired correction value data.