Sub-Pixel Dimming Layout for Edge Color Line Suppression
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Solution Overview
Problem
Existing display devices suffer from visibility or visual recognition of unwanted lines of a corresponding color due to uneven luminance distribution among sub-pixels, particularly at the edges of the display panel.
Innovation Solution
A display device with a dimming circuit that controls luminance differently based on the location of sub-pixels, and a rendering circuit that applies varying rendering filters to improve image quality by reducing luminance at the edges, combined with a padding circuit that adds offset values to image data to enhance edge visibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If uniform luminance control is applied to all sub-pixels, then manufacturing and control are simple, but unwanted color lines become visible at panel edges
Solution Approach 1:
The patent applies different luminance control strategies to different spatial locations of sub-pixels. Specifically, sub-pixels at panel edges receive different luminance adjustment than sub-pixels at panel centers, with the dimming circuit applying location-specific dimming factors to eliminate edge artifacts while maintaining uniform appearance across the display.
2Object-affected harmful factors
If location-based luminance adjustment is applied, then visibility of unwanted lines is reduced, but device complexity increases
Solution Approach 1:
The patent segments the display panel into different spatial zones (edge regions and center regions) and applies independent luminance control to each segment. The dimming circuit is divided into multiple dimming units, each responsible for controlling specific groups of sub-pixels based on their spatial location, enabling localized adjustment without requiring complete system redesign.
Solution Approach 2:
The patent pre-calculates and stores dimming factors for different sub-pixel locations before actual display operation. The offset values and dimming parameters are determined in advance based on spatial position, allowing the dimming circuit to simply apply pre-computed values rather than performing complex real-time calculations, thus reducing operational complexity.
3Device complexity
If standard rendering filters are applied uniformly, then processing is simple, but edge visibility and image quality deteriorate
Solution Approach 1:
The patent applies different rendering filters to sub-pixels based on their spatial location. Edge sub-pixels receive different filtering parameters compared to center sub-pixels, with the rendering circuit selecting filters that compensate for edge-specific optical characteristics, thereby improving edge visibility and overall image quality through location-adaptive processing.
Data Source
AI summary
According to embodiments of the disclosure, a display device comprises a driver configured to provide second image data to a display panel based on first image data and the display panel comprising pixels and configured to display an image based on the second image data. Each of the pixels comprises an 11th sub-pixel configured to emit light of a first color, a 21st sub-pixel configured to emit light of a second color, and located adjacent to the 11th sub-pixel in a first direction, a 12th sub-pixel configured to emit light of a third color, and located adjacent to the 11th sub-pixel in a second direction, and a 22nd sub-pixel configured to emit light of the first color, and located in a diagonal direction with respect to the 11th sub-pixel, and wherein the driver comprises a dimming circuit configured to control luminance of one or more of the sub-pixels.