Liquid Crystal Display Panel with Common Electrode Opening
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Solution Overview
Problem
Conventional liquid crystal display panels face challenges in achieving uniform transmittance and luminance due to non-uniform arrangement of liquid crystal molecules, particularly in pixel regions, which affects image quality and display efficiency.
Innovation Solution
A display panel design featuring a first substrate with a pixel electrode and a second substrate with a common electrode having a circular opening, where the opening's diameter is strategically sized relative to the pixel electrode, and both substrates are covered with vertical orientation layers, along with protrusions outside the pixel electrode to support the substrates and enhance molecular alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If conventional liquid crystal display panels are used, then the basic display function is achieved, but uniform transmittance and luminance cannot be achieved due to non-uniform arrangement of liquid crystal molecules
Solution Approach 1:
The patent applies local quality by creating a non-uniform common electrode with a specific geometric pattern (circles arranged in a grid) that generates a tailored electric field distribution. This localized structural modification ensures uniform liquid crystal molecule arrangement specifically in the pixel region, thereby achieving uniform luminance without requiring uniform manufacturing conditions across the entire display panel.
Solution Approach 2:
The patent changes the geometric parameters of the common electrode, transforming it from a conventional flat structure to one with circular openings of specific diameter and spacing. This parameter modification alters the electric field distribution, enabling precise control over liquid crystal molecule orientation and achieving uniform molecular arrangement and consistent optical properties across the display.
2Illumination intensity
If the common electrode is modified with an opening to improve molecular arrangement, then transmittance and luminance uniformity improve, but the device structure becomes more complex
Solution Approach 1:
The patent segments the common electrode into multiple isolated circular regions rather than using a continuous structure. This segmentation creates distinct electric field zones that independently control liquid crystal molecules in different pixel regions, achieving uniform molecular arrangement across the entire display while maintaining a relatively simple fabrication process.
Solution Approach 2:
Instead of modifying the pixel electrode or adding complex alignment layers, the patent inverts the approach by modifying the common electrode structure. This inversion simplifies the overall device complexity because the common electrode is already part of the standard display structure, and its geometric modification is easier to implement than adding new components or complex alignment mechanisms.
3Illumination intensity
If the opening diameter is increased to improve molecular alignment, then luminance uniformity improves, but the area of the common electrode decreases affecting overall display performance
Solution Approach 1:
The patent applies partial action by using circular openings that cover only a portion of the pixel electrode area. The opening diameter is specifically designed to be between 1/3 to 2/3 of the pixel electrode side length, providing sufficient electric field penetration for uniform molecular alignment while preserving enough common electrode area to maintain overall display performance and electro-optical characteristics.
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 allows for controlled molecular arrangement of liquid crystals when a voltage is applied, improving transmittance and luminance uniformity by ensuring uniform influence on liquid crystal molecules, thereby enhancing display performance.
Implementation Method 1
both substrates are covered with vertical orientation layers... controlled molecular arrangement of liquid crystals
Implementation Method 2
A deflection of liquid crystal molecules is controlled by an electric field, so as to control intensity of light
Data Source
AI summary
A display panel and a display apparatus includes the display panel. The display panel includes a first substrate, a second substrate and a liquid crystal layer between the first substrate and the second substrate. The first substrate and the second substrate are disposed opposite to each other, the first substrate comprises a pixel electrode, the second substrate comprises a common electrode, and the common electrode is formed with an opening.


