Field-Sequential Color Display Pixel Grouping for Streak Reduction
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Solution Overview
Problem
Field-sequential color system organic EL display devices suffer from color breakup and streaks in displayed images, particularly when moving images are viewed, due to the human eye's perception of luminance accumulation during movement.
Innovation Solution
A display device and method that classify pixels into groups based on specific patterns to assign different colors to each group in each subframe, ensuring that adjacent pixels do not display the same color, thereby reducing streaks by displaying four subframes in one frame interval.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If field-sequential color system displays three subframes in one frame interval, then the amount of circuits and layout footprint is reduced, but color breakup and streaks occur in the displayed image
Solution Approach 1:
The patent divides the pixel array into multiple groups (first group, second group, third group, fourth group) based on their positional relationships. Each group is assigned different color subframes in a systematic pattern, ensuring that adjacent pixels display different colors during eye tracking. This segmentation approach maintains the field-sequential color system's circuit reduction benefits while eliminating the color breakup and streaks problem.
2Device complexity
If the same color is assigned to adjacent pixels in field-sequential color system, then the circuit design is simplified, but streaks become visually perceptible during eye tracking
Solution Approach 1:
The patent applies local quality by assigning different color patterns to different spatial locations. Specifically, pixels in different groups (first, second, third, fourth groups) are assigned different color subframes based on their positional characteristics. This ensures that when the human eye tracks moving objects, adjacent pixels display different colors, preventing the formation of visible streaks while maintaining simplified circuit design through systematic color assignment.
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
The solution effectively minimizes the visual perception of color breakup and streaks by ensuring that each pixel is assigned a different color in each subframe, improving image quality by preventing continuous color appearance in the eye-tracked image.
Implementation Method 1
An organic EL element is a light-emitting element that emits light of a luminance corresponding to the amount of current passing through it
Data Source
AI summary
A display device includes a display unit including multiple pixels, and a driving circuit that drives the display unit following a color assignation rule. The multiple pixels are classified into first through fourth groups such that groups to which the pixels belong are different from all groups to which pixels belong that are adjacent in eight directions, and pixels adjacent in 8 directions to pixels belonging to the same group, are of the same groups. The first through fourth colors are respectively assigned to the pixels of the first through fourth groups in the first subframe, the second through fourth and first colors are respectively assigned in the second subframe, the third, fourth, first, and second colors are respectively assigned in the third subframe, and the fourth and first through third colors are respectively assigned in the fourth subframe.