Multispectral Sensor Sub-pixel Array Single Exposure Imaging
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Solution Overview
Problem
Conventional multispectral sensing systems are inadequate for producing high-quality images and require complex implementation steps, often resulting in blurry images due to limited exposure time and precise synchronization requirements with mechanical filters or beam splitters.
Innovation Solution
A multispectral sensing device with a Bayer-pattern array of pixels, each comprising multiple sub-pixels that can detect different wavelengths, and a processing circuit to tune the detection wavelength band, allowing for single-exposure multispectral imaging without mechanical filters or beam splitters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional multispectral sensing systems use filter wheels or beam splitters with multiple detectors, then they can capture different spectral channels, but they require complicated implementation steps and precise synchronization which results in blurry images
Solution Approach 1:
The patent combines multiple spectral detection capabilities into a single pixel structure by integrating multiple sub-pixels (e.g., red, green, blue, and clear sub-pixels) within each pixel unit. This merging eliminates the need for separate detectors, filter wheels, and beam splitters, thereby reducing device complexity while maintaining spectral imaging capability.
Solution Approach 2:
The patent replaces mechanical filter wheels and beam splitter systems with an electronic/microscopic solution using sub-pixel arrays and wavelength-selective filters deposited directly on the sensor surface. This substitution eliminates mechanical moving parts and synchronization requirements, directly addressing the complexity and image quality issues.
2Measurement precision
If conventional systems use mechanical filters or beam splitters, then they can separate spectral channels, but they require precise synchronization and limited exposure time which causes blurry images
Solution Approach 1:
The patent enables simultaneous capture of multiple spectral bands by combining multiple sub-pixels within each pixel that can detect different wavelengths concurrently during a single exposure. This eliminates the temporal separation required by mechanical filter systems, allowing full exposure time utilization for each spectral channel and producing sharp images.
3Adaptability or versatility
If conventional multispectral systems are implemented, then they can capture spectral information, but they require complicated optical components and synchronization mechanisms
Solution Approach 1:
The patent extracts and eliminates complex mechanical optical components (filter wheels, beam splitters, multiple separate detectors) by integrating spectral filtering and detection functions directly into the pixel structure through sub-pixel arrays and deposited wavelength-selective filters, thereby simplifying the overall system while maintaining spectral versatility.
Solution Approach 2:
The patent creates a universal pixel structure that can detect multiple wavelengths simultaneously through its multi-subpixel design, where each sub-pixel is optimized for specific wavelength ranges. This single multi-functional pixel unit replaces multiple specialized detectors and mechanical components, achieving spectral versatility without complexity.
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
Enables high-quality multispectral imaging with single exposure, eliminating the need for complex optical components and reducing image defects, while allowing flexible detection of various wavelengths.
Implementation Method 1
Each of the pixels may comprise a plurality of sub-pixels, and at least two of the sub-pixels in one pixel of the array may be configured to detect light of different wavelengths
Implementation Method 2
a processing circuit coupled to each of the sub-pixels and configured to tune a detection wavelength band of the sub-pixel
Data Source
AI summary
A multispectral sensing device is disclosed. The sensing device may comprise an array of pixel units. Each of the pixel units may comprise four pixels in a two by two configuration. Each of the pixels may comprise a plurality of sub-pixels. Each of the pixel units may include at least one pixel that includes at least two sub-pixels configured to detect light of different wavelengths.