In this dataset, it is a patent family that combines CMOS image sensor or CMOS imager hardware language with modeling-specific claim terms such as pixel simulation, optical crosstalk modeling, device TCAD, or quantum efficiency modeling, and falls within IPC classes H01L27/146, G06F30, or H04N25. That combination separates simulation and modeling claims from the much larger body of general image-sensor hardware patents that do not address modeling methods at all. A patent describing only sensor fabrication without a modeling or simulation claim would not be captured here.

The dataset shows 32 filings in 2017, the single largest year across the 2015-2026 window, followed by a drop to flat activity by the 2022 midpoint. This pattern is consistent with an early burst of claim-staking around pixel and crosstalk simulation methods, likely tied to a particular generation of mobile and consumer sensor designs, followed by assignees either exhausting the obvious claim space or shifting effort elsewhere. Because publication lags filing by roughly 18 months, the very latest years in the chart will understate true activity, but the 2022-onward flatness is too sustained to be explained by lag alone.

The two assignees tracked for recent-year momentum in this dataset, OPPO and Universite Laval, both show zero filings in the latest tracked year, which reflects the broader post-2017 decline in filing activity across the whole set. That does not mean the underlying technology is abandoned; the smartphone and imaging industry cycles hardware generations regularly and simulation claims can resurface with each new sensor design. A monitoring alert on the core IPC classes is the more reliable way to catch new activity than relying on any single assignee's historical filing pattern.

The evidence suggests yes, relatively speaking: H01L, the semiconductor-device IPC class, appears in only 11 of the 44 records in this dataset, compared to 42 for H04N and 28 for G06T. Most of the claim density sits in image and signal processing built around sensor output rather than in device physics or pixel-geometry simulation itself. That imbalance points to device TCAD and quantum efficiency modeling tied to specific pixel structures as comparatively under-claimed ground, though any drafting decision should be confirmed with a targeted clearance search rather than this composition figure alone.

US10264178B2, assigned to Guangdong OPPO Mobile Telecommunications and published 2019-04-16, covers a specific control flow: outputting a combination image from an image sensor, comparing its brightness to a preset threshold, and branching into either a true-color conversion path or a color-block-to-simulation-image conversion path depending on that comparison. It blocks that particular brightness-gated branching architecture for producing a simulation true-color image, not image-sensor simulation broadly. Designs that use a different triggering condition than a brightness threshold, or that do not route through a color-block intermediate image, sit outside its literal claim scope, though a full design-around analysis needs the granted claim language rather than the abstract alone.