Display Panel Boundary Pixel Rendering for Pentile Color Band Elimination
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Solution Overview
Problem
Display devices with a pentile matrix structure and curved or hole-defined edges often exhibit visible color bands due to asymmetrical pixel arrangements, which affect image quality and aesthetics.
Innovation Solution
A method and system for driving display devices that involves setting image data for inactive regions to dummy data and performing rendering operations for boundary pixels using image data from both active and inactive regions, along with dimming operations based on pixel arrangement data, to prevent color band visibility and improve image distortion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If sub-pixels are arranged in a pentile matrix structure to increase resolution, then display resolution is improved, but color band visibility occurs at edge portions
Solution Approach 1:
The patent applies different processing methods to different regions of the display panel. Specifically, boundary pixels at the edge portions are identified and processed differently from internal pixels in the active region. The image processor performs rendering operations specifically for boundary pixels using dummy data from the inactive region, while internal pixels are processed normally. This local differentiation resolves the color band issue at edges without affecting the overall high resolution achieved by the pentile matrix structure.
2Adaptability or versatility
If the display panel includes curved sides or hole-defined regions to meet design requirements, then adaptability is improved, but color band visibility and image distortion occur at boundary pixels
Solution Approach 1:
The patent performs preliminary actions by setting dummy data in the inactive region before processing the boundary pixels. The image processor first identifies boundary pixels at the edge portions, then uses the pre-prepared dummy data from the inactive region to perform rendering operations on these boundary pixels. This preliminary preparation of dummy data enables the system to handle various display panel shapes (curved sides, hole-defined regions) and prevents color band visibility without requiring additional hardware modifications.
3Object-generated harmful factors
If rendering operations are performed for boundary pixels using dummy data from inactive region, then color band visibility is prevented, but processing complexity increases
Solution Approach 1:
The patent introduces dummy data as an intermediary element to resolve the color band issue. The inactive region is filled with dummy data that serves as a mediator for the rendering operation on boundary pixels. This intermediary dummy data allows the image processor to perform rendering operations that blend the boundary pixels smoothly, preventing color band visibility. The approach adds minimal processing complexity since the dummy data generation and rendering operations can be integrated into the existing image processing pipeline without requiring significant additional hardware or computational resources.
Data Source
AI summary
A display device includes a display panel including a plurality of pixels, the display panel having an active region in which an image is displayed and an inactive region adjacent to the active region, an image processor setting image data of the inactive region to dummy data, and performing a rendering operation for a boundary pixel of the plurality of pixels based on the dummy data to generate output image data, the boundary pixel located in the active region and adjacent to the inactive region, and a panel driver providing a driving signal to the display panel to display the image corresponding to the output image data.