Imaging Device Pixel Array Exposure Control for Spectrum Analysis
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Solution Overview
Problem
Current imaging devices for spectrum analysis lack the ability to achieve high light detection accuracy due to variations in exposure times across pixels, limiting their dynamic range and detection precision.
Innovation Solution
The implementation of a pixel array with a drive section that sets exposure times differently for groups of pixels arranged in specific directions, allowing for equal light receiving sensitivities in one direction and varying sensitivities in another, enabling precise detection of light with different wavelengths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If exposure times are varied across pixels to extend dynamic range, then light detection accuracy improves, but pixel array complexity increases
Solution Approach 1:
The pixel array is divided into multiple regions (first region and second region) with different exposure time characteristics. The first region pixels have substantially equal exposure times, while the second region pixels have different exposure times, allowing differential light detection capability without requiring every pixel to be independently controllable
Solution Approach 2:
Different regions of the pixel array are assigned different functional characteristics - the first region is optimized for uniform exposure conditions while the second region provides variable exposure for extended dynamic range. This local differentiation achieves enhanced detection accuracy without uniformly increasing complexity across the entire array
2Adaptability or versatility
If different exposure times are applied to detect light components with varying intensities, then dynamic range increases, but manufacturing precision requirements increase
Solution Approach 1:
The pixel array is segmented into regions where exposure time control is applied at the regional level rather than at the individual pixel level. This segmentation reduces the precision requirements for manufacturing and controlling exposure times, as regional variations can be accommodated more easily than pixel-by-pixel variations
Solution Approach 2:
The patent utilizes changes in exposure time as a key parameter to achieve extended dynamic range. By varying exposure times between regions rather than requiring precise control at the pixel level, the system achieves adaptability to different light intensities while reducing manufacturing precision requirements
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 enhances the dynamic range and accuracy of spectrum analysis by allowing for the detection of light components with varying intensities across different wavelengths, reducing noise and improving the precision of spectral analysis.
Implementation Method 1
each includes a light receiving element
Data Source
AI summary
An imaging device of the present disclosure includes: a plurality of pixels arranged side by side in a first direction and a second direction and each including a light receiving element; and a drive section configured to drive the plurality of pixels. Of the plurality of pixels, ones arranged side by side in the first direction have respective light receiving sensitivities equal to each other. Of the plurality of pixels, ones arranged side by side in the second direction include a first pixel and a second pixel each having a light receiving sensitivity, the light receiving sensitivity of the first pixel and the light receiving sensitivity of the second pixel being different from each other.