Liquid Crystal Display Driving Method for Color Aberration
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Solution Overview
Problem
Vertical alignment liquid crystal technology suffers from viewable angle color aberration, which limits its application, and the existing solutions increase manufacturing costs and reduce the penetration rate of the panel by requiring additional pixel structures and backlight components.
Innovation Solution
A method of dividing display panel sub-pixels into array blocks and selecting one as a glowing pixel, calculating high and low luminance signals based on preset voltage signals, and driving the pixels accordingly to reduce color aberration without the need for primary and secondary pixels or additional transistor elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If vertical alignment liquid crystal technology is used to achieve higher production efficiency and lower manufacturing cost, then production efficiency and manufacturing cost are improved, but viewable angle color aberration occurs
Solution Approach 1:
The pixel structure is segmented into primary pixels and secondary pixels, where primary pixels use conventional driving and secondary pixels use compensation driving voltages. This segmentation allows the majority of pixels to maintain simple structure while specific pixels compensate for viewable angle color aberration, resolving the contradiction between manufacturing simplicity and optical performance.
Solution Approach 2:
Different driving voltages are applied to different spatial locations: primary pixels receive standard driving voltages while secondary pixels receive compensated driving voltages. This local differentiation addresses viewable angle color aberration only where needed, maintaining overall manufacturing efficiency while improving specific optical defects.
2Object-affected harmful factors
If primary pixels and secondary pixels are designed with different driving voltages to solve viewable angle color aberration, then viewable angle color aberration is reduced, but the penetration rate of panel is reduced
Solution Approach 1:
Instead of applying compensation structures to all pixels, only a portion of pixels (secondary pixels) are equipped with compensation driving capabilities. This partial action approach achieves viewable angle color aberration reduction while minimizing the impact on panel penetration rate, as most pixels remain structurally simple.
3Object-affected harmful factors
If metal running line or thin-film transistor element is added to drive secondary pixels, then viewable angle color aberration is compensated, but device complexity increases
Solution Approach 1:
The existing pixel structure and driving circuitry are designed to serve multiple functions: primary pixels handle常规 display while secondary pixels provide both display and viewable angle compensation. This multi-functionality reduces the need for additional dedicated structures, thereby limiting the increase in device complexity while achieving aberration compensation.
Data Source
AI summary
A driving method for a liquid crystal display includes following steps: first sub-pixels are divided into array blocks, and at least one of the first sub-pixels is selected as a glowing pixel; an image to be displayed is received, a pixel signal of a liquid crystal pixel is acquired, and a high voltage panel driving signal and a low voltage panel driving signal of each first sub-pixel are achieved by looking up a table for the liquid crystal pixel; a high luminance signal and a low luminance signal for driving the glowing pixel are calculated according to the high voltage panel driving signal and the low voltage panel driving signal of the first sub-pixel in one array block, respectively; the glowing pixel are driven in turn by the high luminance signal and the low luminance signal, and the other first sub-pixels are driven by the pixel signal.