Pulsed Display Row Shuffling to Reduce Saccadic Artifacts
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Solution Overview
Problem
Electronic displays, particularly micro-LED displays, experience image artifacts due to alignment of row emission rolling with human eye movements, causing bright or dark line patterns.
Innovation Solution
Implement spatial and temporal mixing of row emission patterns across rows, columns, or subframes of local passive matrices (LPMs) to shuffle the row emission order, reducing the likelihood of image artifacts by dispersing the timing of row emission order with human eye movements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If row emission rolling is implemented in a fixed sequential order, then the display can be driven efficiently with simple timing control, but image artifacts appear when eye movements align with the emission timing
Solution Approach 1:
The patent applies dynamics by transitioning from a fixed sequential row emission order to a dynamic, variable emission pattern. The row emission sequence is shuffled or randomized across different frames or subframes, causing the emission timing to change adaptively rather than remaining static. This dynamic adjustment prevents alignment with fixed eye movement patterns, eliminating the harmful image artifacts while preserving efficient display driving.
2Object-affected harmful factors
If spatial filtering or row emission shuffling is applied to reduce image artifacts, then image quality improves, but the complexity of timing control and row emission management increases
Solution Approach 1:
The patent employs periodic action by implementing row emission shuffling in a cyclic or periodic manner across multiple frames. The emission pattern repeats with variations (e.g., different shuffle sequences for different frames), creating a periodic structure that systematically addresses artifact alignment issues. This approach manages timing control complexity through structured repetition rather than completely random or complex adaptive control.
3Object-affected harmful factors
If different row emission patterns are used across columns or subframes, then the alignment with eye movements is disrupted and artifacts are reduced, but the control system becomes more complex
Solution Approach 1:
The patent applies segmentation by dividing the display into multiple controllable units (columns, subframes, or regions) and applying different row emission patterns to each segment. Each segment can have its own emission sequence or pattern, allowing independent control to disrupt artifact alignment. This segmentation approach manages overall system complexity by breaking down the control problem into smaller, manageable units that can be controlled independently.
Data Source
AI summary
Electronic devices, displays, and methods are provided for performing row shuffling to reduce an appearance of image artifacts during eye movements such as saccades. An electronic display may include a number of rows of display pixels and driving circuitry to drive the rows of pixels. The driving circuitry may spatially shuffle or temporally shuffle, or both spatially and temporally shuffle, a row order of driving the rows of display pixels.