Pixel Driving Method for VA Display Graininess Reduction
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Solution Overview
Problem
Vertical Alignment (VA) liquid crystal technology in large-sized display panels suffers from graininess due to alternation of bright and dark sub-pixels, leading to poor image quality, especially at large viewing angles.
Innovation Solution
A pixel driving method that acquires pixel signals for sub-pixels in a pixel block, determines color signals, and loads specific gray-scale signals to sub-pixels based on preset rules and proportion standards to minimize graininess, improving display quality by adjusting gray-scale signals for each sub-pixel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If different gray-scale signals are loaded to adjacent same-color sub-pixels to improve viewing angle performance, then optical property at large viewing angle is improved, but graininess occurs in the displayed image
Solution Approach 1:
The patent applies local quality by differentiating the treatment of sub-pixels based on their spatial location and color channel. Different gray-scale signal loading strategies are applied to different color channels (RGB) and different spatial positions within the pixel block, optimizing each local region's contribution to overall display quality while minimizing graininess in specific areas.
Solution Approach 2:
The patent changes the gray-scale signal parameters dynamically based on the color channel and spatial position. By adjusting the gray-scale signal values and their distribution patterns across different sub-pixels, the patent optimizes the optical properties at large viewing angles while controlling the graininess effect through parameter modulation.
2Illumination intensity
If gray-scale signals are adjusted to maintain image clarity at various viewing angles, then display quality is improved, but the complexity of signal processing increases
Solution Approach 1:
The patent segments the pixel block into multiple unit pixels, each containing red, green, and blue sub-pixels. This segmentation allows independent processing of gray-scale signals for each color channel and spatial position, enabling targeted optimization without requiring complex global processing of the entire display panel.
Solution Approach 2:
The patent employs preliminary action by pre-defining the gray-scale signal loading rules and patterns for different color channels and spatial positions. The processing circuit is designed to automatically apply these predetermined rules, reducing the need for complex real-time calculations and simplifying the overall signal processing architecture.
Data Source
AI summary
A pixel driving method is provided. The method includes: acquiring pixel signals of sub-pixels of each color of each unit pixel in a pixel block, where the unit pixel includes a red sub-pixel, a green sub-pixel and a blue sub-pixel; and loading first-type gray-scale signals to a part of same-color sub-pixels in the pixel block and loading second-type gray-scale signals that are not equal to the first-type gray-scale signals to the remaining same-color sub-pixels based on a preset rule according to the pixel signals of the sub-pixels of each color, signal determination intervals and a proportion standard value corresponding to each of the signal determination intervals, thus improving the graininess of the pixel block during display.