Imaging Element Correction Pixel Integration
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Solution Overview
Problem
Conventional imaging elements face issues with the spatial distance between pixel signal reading positions and optical black regions, leading to differences in output reference levels and the need for correcting these levels based on charge accumulation time, especially when using block division methods.
Innovation Solution
Incorporating correction pixels with specific spectral characteristics and light blocking layers or short circuits to generate noise elimination data, allowing for accurate detection of dark current and noise reduction, while maintaining a compact imaging element design by integrating correction pixels within the photoelectric converting region.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If an optical black region is provided in a region differing from the effective pixel region, then the imaging element can provide a reference level for noise elimination, but the surface area of the imaging element becomes larger
Solution Approach 1:
The patent merges the optical black region function with the effective pixel region by providing correction pixels within the effective pixel region itself. These correction pixels are interspersed among the imaging pixels and perform the reference level detection function traditionally reserved for separate optical black regions, thereby eliminating the need for additional surface area while maintaining noise elimination capability
Solution Approach 2:
The patent repositions the reference level detection function from a spatially separate optical black region to an integrated structure within the pixel array. By using correction pixels that are spatially co-located with imaging pixels but functionally distinct, the solution transitions from a separate regional approach to an embedded dimensional integration within the same pixel plane
2Device complexity
If an optical black region is spatially distanced from the pixel reading position, then the imaging element structure is simplified, but differences occur in output reference levels and correction becomes necessary
Solution Approach 1:
The patent applies local quality by providing correction pixels with specific spectral characteristics at different locations within the effective pixel region. Each correction pixel is tailored to match the spectral properties of adjacent imaging pixels, ensuring local reference level accuracy while maintaining overall structural simplicity
Solution Approach 2:
The patent changes the spectral parameters of correction pixels to match different regions of the effective pixel region. By adjusting the spectral characteristics of correction pixels according to their local environment, the system maintains reference level consistency across different spatial positions without requiring complex structural modifications
3Area of stationary object
If correction pixels are integrated within the photoelectric converting region, then the surface area is reduced, but the manufacturing precision requirements increase
Solution Approach 1:
The patent segments the pixel array into imaging pixels and correction pixels with distinct functional roles. This segmentation allows for standardized manufacturing processes where each pixel type can be produced with consistent specifications, reducing the overall manufacturing precision burden compared to creating entirely unique integrated structures
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 solution enables precise noise elimination and reduced surface area requirements, improving image quality and efficiency by ensuring accurate dark current detection and noise reduction without the need for separate optical black regions.
Implementation Method 1
a microlens; a pixel that is provided to correspond to the microlens and generates image data by photoelectrically converting light incident thereto
Implementation Method 2
generates image data by photoelectrically converting light incident thereto
Implementation Method 3
a pixel that is provided to correspond to the microlens and generates image data by photoelectrically converting light incident thereto via a filter having a predetermined spectral characteristic
Implementation Method 4
Incorporating correction pixels with specific spectral characteristics and light blocking layers or short circuits to generate noise elimination data
Data Source
AI summary
To provide a new arrangement configuration for optical black pixels, provided is an imaging element including a microlens; a pixel that is provided to correspond to the microlens and generates image data by photoelectrically converting light incident thereto via a filter having a predetermined spectral characteristic; and a correction pixel that is provided to correspond to the microlens and generates correction data used to eliminate noise included in the image data.