LCD Dithering Pattern Assignment for Stripe Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Liquid crystal displays (LCDs) experience issues with horizontal or vertical stripes and flickering due to uneven distribution of dithered pixels across frames, resulting from consistent dithering patterns applied to each frame.
Innovation Solution
An LCD with a liquid crystal panel divided into regions, each receiving a primitive image signal corrected using unique dithering patterns, where adjacent regions have different dithering patterns to ensure uniform pixel distribution across the display.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the same dithering pattern is applied to each frame, then the dithering process is simple and consistent, but horizontal or vertical stripes and flickering appear due to uneven distribution of dithered pixels
Solution Approach 1:
The patent applies dynamics by making the dithering pattern variable across different display regions rather than static and uniform. Specifically, adjacent display regions are assigned different dithering patterns that vary spatially, creating a dynamic distribution of dithered pixels that prevents stripe formation while maintaining manageable system complexity through systematic pattern assignment
Solution Approach 2:
The patent implements local quality by assigning different dithering patterns to different local regions (display regions) of the LCD panel. Each region receives a tailored dithering pattern appropriate to its location, with adjacent regions having different patterns. This localized approach eliminates the uniformity that causes stripes while keeping the overall system structured and controllable
2Reliability
If different dithering patterns are applied to adjacent display regions, then stripe and flickering issues are prevented, but the system complexity increases due to multiple pattern management
Solution Approach 1:
The patent applies segmentation by dividing the LCD display into multiple discrete display regions, each independently assigned a specific dithering pattern. This segmentation allows different patterns to be applied to adjacent regions without requiring complete redesign of the entire system. The segmentation is systematic, with patterns assigned based on region position, making the complexity manageable through structured organization rather than random variation
Solution Approach 2:
The patent implements periodic action by using dithering patterns that vary in a systematic, repeating manner across display regions. The patterns are assigned periodically based on region position, creating a predictable sequence that prevents stripe formation. This periodic variation in pattern assignment across space (rather than time) maintains uniform pixel distribution while keeping the system structured and the number of required patterns limited
Data Source
AI summary
A liquid crystal display (LCD) and a method of driving the LCD in which the LCD includes a liquid crystal panel divided into a plurality of display regions, each of the display regions having a plurality of pixels; and a timing controller receiving a primitive image signal for displaying an image in the display regions, and correcting the primitive image signal using a plurality of dithering patterns respectively corresponding to the display regions, wherein the display regions in contact with each other on at least one side correspond to different dithering patterns.