Image Processing Circuit Edge Rendering for Flat Panel Displays
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Solution Overview
Problem
Flat panel display devices with sub-pixels arranged in strips face challenges in expressing high-resolution images due to the black matrix, which reduces the aperture ratio and deteriorates the ability to render diagonal and horizontal line edges effectively.
Innovation Solution
An image-processing circuit that determines the presence of diagonal or horizontal line edges in input image data and adjusts the data rendering of center unit pixels to peripheral pixels based on edge information, using edge masks and weight values to improve edge rendering, thereby enhancing the display of diagonal and horizontal line edges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If sub-pixels are arranged in strips with black matrix between them, then manufacturing is simplified and color reproduction is maintained, but aperture ratio is reduced and ability to express high-resolution images deteriorates
Solution Approach 1:
The patent applies preliminary action by detecting edge information from input image data before the data is output to the display panel. The image-processing circuit determines whether diagonal or horizontal line edges are present and adjusts pixel data rendering in advance, so that when the display panel renders the image, the edges are already optimized for accurate representation without requiring structural changes to the black matrix or sub-pixel arrangement.
2Reliability
If black matrix is used between sub-pixels, then structural support and color isolation are improved, but aperture ratio is reduced and diagonal line edge rendering is deteriorated
Solution Approach 1:
The patent applies parameter changes by modifying the pixel data parameters based on detected edge information. When diagonal or horizontal line edges are detected, the image-processing circuit adjusts the brightness and color values of the corresponding pixel data before output. This changes the rendering parameters to compensate for the aperture ratio reduction caused by the black matrix, ensuring that edge regions maintain adequate brightness and contrast without requiring changes to the physical black matrix structure.
3Ease of manufacture
If conventional stripe structure is used, then manufacturing is easier and production cost is lower, but ability to express diagonal and horizontal line edges is reduced
Solution Approach 1:
The patent applies mechanics substitution by replacing the need for complex mechanical or structural edge enhancement mechanisms with a signal processing approach. Instead of modifying the physical display structure to improve edge rendering, the invention uses an image-processing circuit to detect edges in the input signal and adjust the pixel data accordingly. This substitutes physical structural changes with electronic signal processing, maintaining the simple stripe structure while achieving improved edge rendering accuracy.
Data Source
AI summary
Disclosed are an image-processing circuit capable of improving the ability to express a high-resolution image and a display device having the same and a method of driving a display device. The image-processing circuit determines whether input image data represents one or more of a forward diagonal line edge, a backward diagonal line edge, and a horizontal line edge, and then determines arrangement of a center unit pixel, and thereafter renders data of the center unit pixel into data of a peripheral unit pixel based on edge information and the arrangement of the center unit pixel.