LCD Pixel Electrode Bar-Shaped Gaps for White Sides Elimination
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Solution Overview
Problem
Liquid crystal display (LCD) panels exhibit the 'white sides' phenomenon, where side areas appear brighter than the middle area due to distorted gate driving voltage, leading to uneven brightness, especially noticeable at low gray levels.
Innovation Solution
The LCD panel design includes pixel units with bar-shaped gaps and first electrode patterns that increase in area and width from the middle to the side regions, reducing liquid crystal efficiency and light transmittance in side regions, thereby reducing brightness differences and alleviating the 'white sides' effect.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If gate driving voltage is inputted from both sides of the LCD panel, then the middle area receives distorted voltage due to RC delay, but the side areas maintain normal voltage, resulting in brightness non-uniformity
Solution Approach 1:
The patent applies local quality by making the bar-shaped gaps have different widths in different regions of the pixel electrode. Specifically, the gaps in side region pixel electrodes have larger widths than those in middle region pixel electrodes. This creates spatially varying electrical characteristics that compensate for the RC delay effects, with wider gaps in side regions reducing local capacitance and thus compensating for the voltage distortion that occurs during voltage transmission from the gate driving electrodes.
2Measurement precision
If the LCD panel displays at low gray level, then human eyes are more sensitive to brightness differences, but the white sides phenomenon becomes especially obvious
Solution Approach 1:
The patent applies parameter changes by systematically varying the width parameter of the bar-shaped gaps across different regions of the pixel electrode. The gap width is changed from smaller values in the middle region to larger values in the side regions. This parameter variation modifies the electrical characteristics (capacitance distribution) of the pixel electrode, which in turn compensates for the RC delay effects and achieves more uniform voltage distribution, thereby reducing the white sides phenomenon that is particularly visible at low gray levels where human eye sensitivity is higher.
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
This design achieves better brightness uniformity across the panel by reducing the brightness of side regions, effectively eliminating or minimizing the 'white sides' phenomenon.
Implementation Method 1
Each pixel electrode includes a number of bar-shaped gaps and a number of first electrode patterns. The bar-shaped gaps and the first electrode patterns are alternatively arranged.
Data Source
AI summary
The present invention provides a liquid crystal display (LCD) panel and an array substrate thereof. The LCD panel includes a number of pixel units, each of the pixel units includes a pixel electrode, and each pixel electrode includes a number of bar-shaped gaps and a number of first electrode patterns. The bar-shaped gaps and the first electrode patterns are alternatively arranged. In the number of the pixel units, the sum of the area of the bar-shaped gaps in each of the pixel units increases gradually along a direction from a middle region of the LCD panel to side regions of the LCD panel, while the sum of the area of the first electrode patterns in each of the pixel units is same. By using the above means, the LCD panel of the present invention obtains better brightness uniformity, and “white sides” phenomenon is alleviated or even eliminated.