Liquid Crystal Display Panel Inclined Substrate Surfaces
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Solution Overview
Problem
Existing liquid crystal display panels exhibit color discrepancies when viewed from different angles due to uniform tilt states of liquid crystal molecules, leading to reduced image quality.
Innovation Solution
The liquid crystal display panel is designed with inclined surfaces in each pixel unit, where the surfaces of the opposed and array substrates facing the liquid crystal layer are tilted, ensuring different tilt states and equal phase delays in both pixel regions, thereby maintaining consistent color across viewing angles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If alignment films with opposite friction directions are coated on opposing surfaces and liquid crystal molecules are arranged along the pre-tilt angle direction, then uniform brightness and high contrast are achieved, but color discrepancies occur when viewed from different angles
Solution Approach 1:
Each pixel unit is divided into two pixel regions with different tilt states. The first pixel region has liquid crystal molecules tilted at a positive pre-tilt angle, while the second pixel region has molecules tilted at a negative pre-tilt angle. This segmentation allows different portions of the pixel to compensate for each other's color deviation when viewed from different angles, achieving color consistency across the entire viewing range while maintaining uniform brightness and contrast.
2Device complexity
If liquid crystal molecules have a single tilt state, then simple alignment structure is achieved, but phase delays differ when observed from left and right sides causing color differences
Solution Approach 1:
Different regions within each pixel unit are assigned different local properties - specifically, different tilt states. The first pixel region employs a positive pre-tilt angle configuration while the second pixel region uses a negative pre-tilt angle configuration. This local differentiation ensures that phase delays from left and right viewing angles are compensated, eliminating color discrepancies without requiring complex overall structural changes.
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 ensures that colors observed from left and right viewing angles are the same, enhancing image quality by eliminating color discrepancies and improving viewing angle characteristics.
Implementation Method 1
alignment films 04 having opposite friction directions are coated on opposing surfaces of the opposed substrate 01 and the array substrate 02, respectively; the alignment film 04 makes the liquid crystal molecules be arranged orderly along a direction of a pre-tilt angle δ
Implementation Method 2
the liquid crystal layer 03 comprises anisotropic liquid crystal molecules having a negative dielectric constant; applies a voltage to control the liquid crystal molecules to rotate
Implementation Method 3
the surface of the array substrate facing the liquid crystal layer in the one of the two pixel regions is inclined; the surface of the opposed substrate facing the liquid crystal layer in the one of the two pixel regions is inclined
Data Source
Figure 1~2a
Figure 2b~2c
Figure 2d~2e
AI summary
A liquid crystal display panel, a fabrication method thereof and a display device are provided. The liquid crystal display panel comprises: an opposed substrate (10) and an array substrate (20) arranged opposite to each other, and a liquid crystal layer (30) filled between the opposed substrate (10) and the array substrate (20). Alignment films (40) having opposite friction directions are provided on opposing surfaces of the opposed substrate (10) and the array substrate (20), respectively. The liquid crystal display panel has a plurality of pixel units which are arranged in array, and each of the pixel units comprises two pixel regions (A, B) along the friction direction of the alignment film. In each of the pixel units, a surface of the opposed substrate (10) facing the liquid crystal layer (30) or a surface of the array substrate (20) facing the liquid crystal layer (30) within at least one of the two pixel regions is inclined, so that a mean value of included angles between long axes of liquid crystal molecules in the liquid crystal layer within one of the two pixel regions and a horizontal plane where the opposed substrate (10) and the array substrate (20) are located and a mean value of included angles between long axes of liquid crystal molecules in the liquid crystal layer within the other of the two pixel regions and the horizontal plane where the opposed substrate (10) and the array substrate (20) are located has a same absolute value and a sum of zero.