Liquid Crystal Display Panel Alignment Layer Design
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Solution Overview
Problem
The increasing pixel per inch (PPI) in liquid crystal display panels leads to a smaller distance between the color film substrate and the array substrate, resulting in a stronger electric field and increased probability of color mixing and color cast phenomena due to the larger turning range of liquid crystal molecules.
Innovation Solution
A liquid crystal display panel design featuring sub-pixel regions with distinct alignment layers on the array and color film substrates, where the alignment direction of the first alignment region differs from the second alignment region, and the alignment direction of the second alignment layer is parallel to the first alignment layer, controlling the turning angle of liquid crystal molecules to reduce color mixing and color cast.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the distance between color film substrate and array substrate is reduced to increase PPI, then pixel density is improved, but the electric field strength increases causing larger liquid crystal molecule turning range and color mixing phenomenon
Solution Approach 1:
The patent applies different alignment directions to different regions: the first alignment layer has a first alignment direction in the opening region and a second alignment direction in the light shielding region, while the second alignment layer has alignment directions that are parallel to corresponding regions in the first alignment layer. This local differentiation of alignment properties controls liquid crystal molecule orientation in specific areas to reduce color mixing while maintaining high PPI
Solution Approach 2:
The alignment layers are divided into multiple regions with different alignment directions - the first alignment layer is segmented into a first alignment region and a second alignment region corresponding to opening and light shielding areas respectively, allowing independent control of liquid crystal behavior in different zones to prevent color casting
2Manufacturing precision
If the distance between substrates is reduced to improve PPI, then pixel density is improved, but transmissivity deteriorates due to stronger electric field and larger liquid crystal turning range
Solution Approach 1:
By setting the alignment direction of the first alignment region differently from the second alignment region, and making the second alignment layer's regions parallel to corresponding first alignment layer regions, the patent optimizes liquid crystal orientation locally to improve light transmissivity while maintaining high PPI
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 effectively alleviates the color mixing and color cast phenomena by controlling the turning angles of liquid crystal molecules, reducing light leakage and improving the manufacturing efficiency and cost of the liquid crystal display panels.
Implementation Method 1
a first alignment layer on a side of the array substrate facing the liquid crystal layer, where the first alignment layer includes a first alignment region corresponding to the opening region and a second alignment region corresponding to the light shielding region, and an alignment direction of the first alignment region is different from an alignment direction of the second alignment region
Data Source
AI summary
A liquid crystal display panel and a method for manufacturing the same, and a display device are provided. The liquid crystal display panel includes: an array substrate, a color film substrate, a liquid crystal layer, a first alignment layer and a second alignment layer. The first alignment layer includes a first alignment region corresponding to an opening region and a second alignment region corresponding to a light shielding region. An alignment direction of the first alignment region is different from an alignment direction of the second alignment region, and an alignment direction of a region in the second alignment layer is parallel to an alignment direction of a region in the first alignment layer corresponding to the region in the second alignment layer. According to the present disclosure, a color mixing and color cast phenomenon in the liquid crystal display panel is alleviated.