Color Sequential Display White Channel Segmentation
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Solution Overview
Problem
Conventional color-sequential display technologies suffer from color-breakup artifacts due to the sequential presentation of different color primaries, which can cause misregistration and perceived rainbows on bright white regions against dark backgrounds when the observer's head or eye moves.
Innovation Solution
The introduction of a white channel that represents a portion of the overall intensity common to all color channels, allowing for reduced intensities in the dedicated red, green, and blue channels, and the use of additional color channels such as red-green, green-blue, or blue-red channels, which can be generated based on image content and eye movement, to mitigate color-breakup by adjusting the reflectance or transmissivity of the display panel accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If conventional color-sequential display presents full intensity RGB channels sequentially, then color saturation and brightness are improved, but color-breakup artifacts and misregistration occur when observer moves
Solution Approach 1:
The invention segments the color presentation into two distinct components: a white channel that carries common intensity information across all color channels, and reduced-intensity dedicated color channels (R', G', B') that carry only the color-specific information. This segmentation allows the white channel to be presented first to establish the base brightness, followed by the smaller color corrections, thereby reducing the temporal displacement between color channels and minimizing color-breakup artifacts while preserving overall brightness.
Solution Approach 2:
The invention transforms the color presentation parameters by converting from full-intensity sequential RGB to a modified format with a white channel and reduced color channels. The intensity parameters of the dedicated color channels are reduced to only the portions not covered by the white channel, while the white channel carries the common intensity portion. This parameter transformation maintains color accuracy and brightness while reducing the harmful temporal separation effects.
2Reliability
If dedicated color channels present full color intensity, then color saturation is improved, but black color reproduction deteriorates due to sequential presentation artifacts
Solution Approach 1:
The invention segments the color information into a white channel containing common intensity and dedicated color channels containing only color-specific portions. By presenting the white channel first and following with smaller color corrections, the system achieves better black reproduction because the reduced intensity of dedicated color channels minimizes the temporal displacement artifacts that previously degraded black levels, while the white channel ensures proper base brightness establishment.
Solution Approach 2:
The invention changes the intensity parameters of the dedicated color channels from full intensity to reduced intensity, where each dedicated channel carries only the portion of color information not already provided by the white channel. This parameter change improves black color reproduction by reducing the magnitude of sequential color presentations that cause misregistration, while the white channel parameter ensures proper overall brightness and contrast.
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 significantly reduces color-breakup by presenting smaller quantities of color intensities at different times, improving black color reproduction and reducing the severity of imaging artifacts like rainbows, while allowing for better black color representation.
Implementation Method 1
Color-sequential displays work because of persistence of vision. If the different colored images (fields) are presented quickly enough in sequence, the human eye will merge them into a full-color image.
Data Source
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AI summary
Described are improved approaches to implement color sequential displays that can mitigate problems with conventional display technologies. Color-breakup is mitigated by modifying the original color channels and adding one or more additional color channels derived from the original ones.