Liquid Crystal Light Control Structure for Moiré Reduction
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Solution Overview
Problem
Liquid crystal display panels face issues with color mura phenomenon and moiré patterns, particularly under oblique viewing angles, due to the uniform distribution of backlight LEDs and the difficulty in achieving high density and precision in light control, which affects display quality and contrast.
Innovation Solution
A liquid crystal display panel design incorporating a liquid crystal light control structure with second data lines as broken lines intersecting second gate lines, overlapping orthographically with sub-pixel units, to control light transmittance and aperture ratios, reducing moiré patterns and color mura by ensuring uniform shielding of sub-pixel units across different colors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If uniform distribution of backlight LEDs is used, then manufacturing simplicity is maintained, but color mura phenomenon occurs under oblique viewing angles
Solution Approach 1:
The patent introduces a liquid crystal light control structure with segmented second data lines that divide the backlight into multiple controllable regions. Each segment can independently adjust light transmittance to compensate for color mura, transforming a uniform uncontrollable backlight into a segmented controllable system without changing the LED distribution pattern.
Solution Approach 2:
The patent implements local quality control by allowing different regions of the liquid crystal light control structure to have different light transmittance characteristics. The second data lines create localized control zones that can adjust light intensity independently, enabling correction of color mura in specific areas while maintaining uniform LED distribution overall.
2Manufacturing precision
If liquid crystal light control structure is added, then light transmittance control precision is improved, but device complexity increases
Solution Approach 1:
The liquid crystal light control structure serves multiple functions: it controls light transmittance precision, prevents color mura, eliminates moire patterns, and maintains aperture ratio uniformity. By making this single structure multi-functional, the patent reduces the need for additional separate components, thereby limiting the increase in device complexity while achieving high light control precision.
Solution Approach 2:
The liquid crystal light control structure acts as an intermediary layer between the backlight unit and the liquid crystal display structure. This mediator provides precise light transmittance control without requiring direct modification of the backlight LEDs or the display structure, isolating the complexity to a single intermediate component.
3Object-affected harmful factors
If second data lines are designed as broken lines, then moire patterns are reduced, but manufacturing precision requirements increase
Solution Approach 1:
The patent introduces asymmetry by designing the second data lines as broken lines rather than continuous straight lines. This asymmetric pattern disrupts the regular grid structure that causes moire patterns when overlaid with the pixel structure, effectively reducing moire while the broken line design allows for more tolerant manufacturing specifications compared to precise continuous lines.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The design effectively improves display quality by eliminating or reducing moiré patterns and color mura, enhancing visual experience by maintaining consistent aperture ratios and mixed white light effects across various viewing angles.
Implementation Method 1
a liquid crystal light control structure, located on a light incident side of the liquid crystal display structure, the liquid crystal light control structure including: a plurality of second data lines, and an orthographic projection of at least one second data line on the liquid crystal display structure overlapping the plurality of sub-pixel units
Data Source
AI summary
Disclosed are a liquid crystal display panel and a liquid crystal display device. The liquid crystal display panel includes: a liquid crystal display structure, the liquid crystal display structure including: a plurality of first gate lines extending in a row direction, a plurality of first data lines extending in a column direction, and a plurality of sub-pixel units defined by the plurality of first gate lines and the plurality of first data lines; and a liquid crystal light control structure located on a light incident side of the liquid crystal display structure, the liquid crystal light control structure including: a plurality of second data lines, an orthographic projection of at least one second data line on the liquid crystal display structure overlapping the plurality of sub-pixel units.