Boundary Pixel Data Conversion for Display Panel Defect Mitigation
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Solution Overview
Problem
Display defects such as dark or bright lines occur near the boundary between display areas in medium and large size screens using Subpixel Rendering (SPR) technology due to the lack of adjacent image data for neighboring pixels during pixel format conversion.
Innovation Solution
A display device with a display panel comprising two regions with different sub-pixel arrangements, where each region has a driving circuit that converts raw pixel data into a suitable format, with additional pixel data from the boundary region used to perform the conversion, and optional buffering and swapping of data to ensure accurate conversion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the display panel is divided into two or more display areas driven by respective driver ICs, then the number of pixels per inch (PPI) increases and the number of channels of driver IC is reduced, but display defects (dark lines or bright lines) occur near the boundary between display areas
Solution Approach 1:
The patent applies preliminary action by having the first driver IC perform pixel format conversion using not only its own raw image data but also the raw image data from the second display area. This advance preparation of data from the neighboring display area enables accurate conversion at the boundary region, preventing display defects before they occur. The first driver IC proactively acquires and utilizes the second raw image data to compensate for the lack of adjacent image data at the boundary.
2Device complexity
If pixel format conversion is performed using only local raw image data from one display area, then the conversion process is simple, but erroneous conversion occurs at the boundary due to lack of adjacent image data
Solution Approach 1:
The patent applies merging by combining the raw image data from the first display area with the raw image data from the second display area during the pixel format conversion process. The first driver IC merges these two data sources to perform accurate conversion at the boundary region. This combining of data from adjacent display areas ensures that the conversion process has access to all necessary adjacent image data, eliminating conversion errors at the boundary while maintaining reasonable process complexity.
Data Source
AI summary
Disclosed is a display device. A display area includes a first region and a second region having a boundary therebetween, with a boundary region defined around the boundary. Conversions of raw pixel data for respective regions having a format suitable for a second sub-pixel arrangement into converted pixel data having a format suitable for a first sub-pixel arrangement are based on the raw pixel data for the respective regions and additionally on the pixel data corresponding to the boundary region. Also disclosed is a method of driving a display panel.