Electro-Optic Display Null State Transition Correction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Electro-optic displays suffer from light edge artifacts due to null state transitions and voltage signals applied to neighboring pixels, which affect the optical state of pixels, leading to undesirable light edges in dark regions of images.
Innovation Solution
A method is introduced to detect null state transitions and apply a voltage signal with a waveform configured to generate an optical black state for pixels that have been affected by neighboring pixel transitions, reducing the appearance of light edges by selectively applying a corrective signal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If voltage signals are applied to all pixels to maintain optical states, then image quality is improved, but power consumption increases and device complexity increases
Solution Approach 1:
The patent applies different voltage signal strategies to different pixels based on their specific needs. Pixels that have undergone null state transitions or are adjacent to such pixels receive corrective voltage signals to maintain proper optical states, while other pixels use standard driving waveforms. This localized approach ensures image quality is maintained only where necessary, reducing overall power consumption.
Solution Approach 2:
The patent applies corrective voltage signals selectively only to pixels that require them (those affected by null state transitions), rather than applying signals to all pixels. This partial action approach maintains image quality for the affected regions while minimizing unnecessary power consumption from redundant voltage applications across the entire display.
2Manufacturing precision
If corrective voltage signals are applied frequently to eliminate light edge artifacts, then visual quality is improved, but pixel damage risk increases
Solution Approach 1:
Corrective voltage signals are applied only to specific pixels that have undergone null state transitions or are adjacent to such pixels, rather than applying signals uniformly across the entire display. This localized correction eliminates light edge artifacts in affected areas while minimizing the total number of voltage applications, thereby reducing cumulative pixel stress and damage risk.
Solution Approach 2:
The system monitors pixel state transitions and applies corrective voltage signals based on detected conditions (null state transitions). This feedback mechanism ensures corrective signals are applied only when and where light edge artifacts occur, maintaining visual quality while avoiding unnecessary voltage applications that could contribute to pixel damage.
3Use of energy by moving object
If null state transitions are allowed to occur, then power consumption is reduced, but light edge artifacts appear in displayed images
Solution Approach 1:
The patent allows null state transitions to occur for most pixels to maintain low power consumption, but selectively applies corrective voltage signals to pixels that undergo these transitions or are adjacent to them. This approach preserves the energy efficiency of null state transitions while locally correcting the light edge artifacts they produce in specific regions.
Solution Approach 2:
The patent converts the potentially harmful effect of null state transitions (which cause light edge artifacts) into a beneficial low-power operation mode. By allowing null state transitions to occur and then selectively correcting only the affected pixels, the system achieves both energy efficiency and acceptable image quality, turning what would be a harmful artifact into an acceptable trade-off.
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 approach effectively reduces the presence of light edge artifacts in images by regenerating the optical black state of affected pixels, improving the visual quality of displayed content while minimizing potential damage from frequent waveform application.
Implementation Method 1
electro-optic display can be operated by applying voltage signals to one or more pixels of the electro-optic display
Data Source
AI summary
Techniques for operating an electro-optic display to reduce the appearance of light edge artifacts in displayed images are described. A method for operating the electro-optic display includes detecting a null state transition of a first pixel when transitioning from a first image to a second image. The method further includes determining whether a threshold number of cardinal neighbors of the first pixel transition from a black state to a white state when transitioning from the first image to the second image. In response to a subsequent transition to a third image, the method further includes applying a voltage signal to the first pixel, wherein the voltage signal has a waveform configured to generate an optical black state for the first pixel.