Liquid Crystal Display Slit Alignment for Uniform Rotation
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Solution Overview
Problem
Conventional horizontal electric field mode liquid crystal display devices experience uneven displaying and reduced light transmittance due to inconsistent rotation directions of liquid crystal molecules at the end regions of slits, caused by non-uniform electric fields.
Innovation Solution
A liquid crystal display panel design featuring a first electrode with slits having end and central regions with different alignment directions, where alignment layers are configured to ensure consistent rotation directions of liquid crystal molecules under applied electric fields, thereby unifying the rotation direction across the slit regions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If slits are formed in pixel electrodes to enable horizontal electric field mode liquid crystal display, then the display mode functionality is achieved, but the electric field direction becomes non-uniform at end regions causing inconsistent liquid crystal molecule rotation
Solution Approach 1:
The patent applies different alignment directions to different regions of the alignment layer. Specifically, the alignment layer has a first alignment direction in the central region of the slit and a second alignment direction in the end regions, allowing each region to be optimized for its local electric field characteristics and achieve uniform liquid crystal molecule rotation throughout
Solution Approach 2:
The alignment layer is pre-configured with different alignment directions in different regions before the liquid crystal molecules are introduced. This preliminary alignment configuration ensures that when voltage is applied, the liquid crystal molecules will rotate consistently in the intended direction across all regions of the slit
2Manufacturing precision
If alignment layers with different alignment directions are configured in end regions and central regions, then liquid crystal molecule rotation uniformity is improved, but the manufacturing process complexity increases
Solution Approach 1:
The patent replaces complex multi-layer alignment structures with a single alignment layer that has spatially varying alignment directions. This is achieved through photo-alignment technology where different regions of the same alignment layer are exposed to UV light from different directions, creating the required different alignment directions without adding structural complexity
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 enhances display uniformity and light transmittance by ensuring all liquid crystal molecules at the end regions rotate in the same direction, improving the overall performance of the liquid crystal display panel.
Implementation Method 1
aligning the alignment layers by using a photo-alignment process so that the alignment layers at the end region and the central region have different alignment directions
Implementation Method 2
an electric field for driving liquid crystal molecules in the liquid crystal layer to rotate is formed between the first electrode and the second electrode when a voltage is applied
Data Source
AI summary
The present disclosure provides a liquid crystal panel and a method for manufacturing the same. The liquid crystal display panel includes: first and second substrates disposed opposite to each other; a liquid crystal layer including a plurality of liquid crystal molecules and disposed between the first and second substrates; first and second alignment layers disposed on the first and second substrates and facing the liquid crystal layer; and first and second electrode both disposed on the first substrate, so that an electric field is formed between the first and second electrodes when a voltage is applied to the first and second electrodes. The first electrode has a plurality of slits, each of which has an end region and a central region adjacent to the end region, and the alignment layers at the end region and the central region have different alignment directions.