Display Substrate Alignment Film Multi-Domain Grooves
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Solution Overview
Problem
Traditional single domain TFT-LCD display modes suffer from severe color cast issues due to plane torsion of liquid crystal molecules, while dual domain structures increase data line length and resistance, affecting aperture ratio and charging efficiency.
Innovation Solution
A display substrate with an alignment film featuring orientation grooves extending along at least two directions in each pixel region, allowing for a multi-domain display mode that compensates for color cast and maintains high aperture ratio by ensuring straight data lines and slits aligned in the same direction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a dual domain structure is adopted to compensate for color cast, then display quality is improved, but data line length increases and resistance increases, affecting aperture ratio and charging efficiency
Solution Approach 1:
The pixel electrode is segmented into multiple domains (first domain and second domain) with different orientation directions. Each domain has pixel electrodes extending in different directions (e.g., horizontal and vertical), creating multiple display domains within a single pixel region. This segmentation allows color cast compensation without requiring extended data lines, as each domain is independently controlled within the same pixel area.
2Ease of manufacture
If data lines are made longer to achieve dual domain structure, then color cast compensation is possible, but aperture ratio decreases and charging efficiency is affected
Solution Approach 1:
Instead of extending data lines in one dimension to create dual domain structures, the invention uses in-plane domain segmentation where pixel electrodes in different domains extend in perpendicular directions (horizontal and vertical dimensions). This dimensional approach allows multiple domains to be packed within the same pixel area without increasing data line length, thereby maintaining high aperture ratio while achieving color cast compensation.
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 multi-domain display mode effectively compensates for color cast and improves display quality without compromising aperture ratio or charging efficiency, as it allows for straight data lines with minimal resistance and smaller widths.
Implementation Method 1
an alignment film for providing a pre-tilt angle for liquid crystal molecules is disposed in the plurality of pixel regions
Implementation Method 2
performing exposure and development on the first region by first linearly polarized light whose polarization direction is a first direction through a first mask pattern to form first orientation grooves
Data Source
AI summary
A display substrate having pre-tilt angle for liquid crystal molecules and a manufacturing method thereof and a display device are provided. The display substrate includes a plurality of pixel regions, an alignment film for providing a pre-tilt angle for liquid crystal molecules being disposed in the plurality of pixel regions. In each of the pixel regions, a surface of the alignment film has a plurality of orientation grooves extending along at least two directions.