Array Substrate Electrode Layout for Portrait-Mode Color Shading
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Solution Overview
Problem
Liquid crystal display panels experience a color shading issue when changing from landscape to portrait mode due to changes in viewing angles, affecting user experience.
Innovation Solution
The array substrate is designed with sub-pixel units having different grayscale values and adjusted branch electrode angles to optimize viewing angles, specifically controlling the acute angles between pixel electrodes and the horizontal visual axis to minimize color shading.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the display panel uses conventional electrode arrangements with uniform angles, then the manufacturing process is simple, but color shading occurs when changing from landscape to portrait mode due to viewing angle changes
Solution Approach 1:
The patent applies local quality by differentiating the electrode arrangement for blue sub-pixel units from red and green sub-pixel units. Specifically, blue sub-pixel units have pixel electrodes extending in a first direction, while red and green sub-pixel units have pixel electrodes extending in a second direction that is different from the first direction. This localized differentiation optimizes viewing angle characteristics for each color channel, reducing color shading when transitioning between landscape and portrait modes without requiring complete redesign of the entire electrode system.
Solution Approach 2:
The patent employs asymmetry by using different extension directions for pixel electrodes of different color sub-pixel units. The blue sub-pixel units use a first extension direction while red and green sub-pixel units use a second extension direction. This asymmetric arrangement breaks the conventional uniform pattern, enabling optimized light emission characteristics for vertical viewing angles while maintaining compatibility with standard manufacturing processes.
2Reliability
If the pixel electrodes are arranged to optimize vertical viewing angles, then color shading is reduced, but the deviation from conventional designs increases manufacturing difficulty
Solution Approach 1:
The patent implements local quality by applying different electrode extension directions only to specific color sub-pixel units (blue versus red/green) rather than redesigning all electrodes. This localized approach maintains manufacturing simplicity for the majority of the display while achieving improved viewing angle characteristics through targeted modifications in critical areas.
Solution Approach 2:
The patent uses parameter changes by modifying the extension direction parameter of pixel electrodes for different color sub-pixel units. By changing the directional parameter from a uniform configuration to a differentiated configuration (first direction for blue, second direction for red/green), the patent optimizes light emission angles without fundamentally altering the manufacturing process or material composition.
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 solution effectively reduces color shading at vertical viewing angles, improving display performance and maintaining optimal luminescence across different viewing positions.
Implementation Method 1
the first sub-pixel units comprise a first pixel electrode, the first pixel electrode comprises at least two first branch electrodes
Data Source
AI summary
An array substrate and a mobile terminal are disclosed. In the array substrate, a grayscale value of a first color displayed by a first sub-pixel unit and a grayscale value of a second color displayed by a second sub-pixel unit are greater than a grayscale value of a third color displayed by a third sub-pixel unit. An acute angle between a first branch electrode of the first sub-pixel unit and a horizontal visual axis and an acute angle between a second branch electrode of the second sub-pixel unit and the horizontal visual axis are less than an acute angle between a third branch electrode of the third sub-pixel unit and the horizontal visual axis.