Liquid Crystal Panel PSVA IPS Hybrid Manufacturing
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Solution Overview
Problem
Conventional liquid crystal display technologies face challenges in achieving high contrast and wide viewing angles simultaneously, with traditional VA displays having poor viewing angles and IPS/FFS displays having poor contrast.
Innovation Solution
A manufacturing method for a liquid crystal panel that incorporates Polymer Stabilization Vertical Alignment (PSVA) and IPS/FFS technologies, utilizing pretilt angles and photopolymerizable monomers to enhance interaction between liquid crystals and alignment films, improving contrast and viewing angles through specific irradiation treatments and electrode configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If traditional VA display technology is used, then high contrast and high transmittance are achieved, but viewing angles become poor
Solution Approach 1:
The liquid crystal display is divided into multiple domains (first domain and second domain) with different pretilt angle orientations. Each domain is controlled by electrodes with slots extending in different directions, allowing independent optimization of viewing angle characteristics while maintaining high contrast through vertical alignment
Solution Approach 2:
Different pretilt angles are applied in different domains - the first photo alignment film creates a first pretilt angle with a specific azimuthal angle relative to slot extending direction, while the second photo alignment film creates a second pretilt angle with azimuthal angle relative to vertical direction of slots. This asymmetric arrangement improves viewing angles while maintaining contrast
2Adaptability or versatility
If traditional IPS/FFS display technology is used, then wide viewing angles are achieved, but contrast becomes poor
Solution Approach 1:
The display is segmented into multiple domains with different pretilt angle configurations. By combining vertical alignment (for contrast) with in-plane switching domains (for viewing angle), the patent achieves both high contrast and wide viewing angles simultaneously
Solution Approach 2:
The patent combines features of VA (vertical alignment for contrast) and IPS/FFS (in-plane switching for viewing angle) technologies into a composite display structure. The liquid crystal panel integrates both vertical pretilt angles and in-plane switching domains, creating a hybrid system that exhibits properties of both parent technologies
3Reliability
If photopolymerizable monomer is added to liquid crystal, then interaction between liquid crystal and alignment film is enhanced, but manufacturing complexity increases
Solution Approach 1:
The patent modifies the chemical composition parameter of the liquid crystal by adding photopolymerizable monomer. This chemical parameter change enhances the interaction between liquid crystal and alignment film through polymerization, improving image sticking resistance without requiring additional manufacturing steps beyond the existing irradiation process
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 method achieves high contrast, quick response, and wide viewing angles while promoting image reliability by optimizing the interaction between liquid crystals and alignment films, thereby addressing the limitations of conventional technologies.
Implementation Method 1
performing a third irradiation treatment on the liquid crystal panel so as to carry out a polymerization of the photopolymerizable monomer
Implementation Method 2
performing a first irradiation treatment on the first photo alignment film so that the first photo alignment film has a first pretilt angle relative to the array substrate
Data Source
AI summary
A manufacturing method of a liquid crystal panel is provided with steps of: providing an array substrate having a first electrode with a plurality of slots and a second electrode thereon, and a color filter substrate; applying a first photo alignment film to the array substrate, and performing a first irradiation treatment on the first photo alignment film to have a first pretilt angle; applying a second photo alignment film to the color filter substrate, and performing a second irradiation treatment on the second photo alignment film to have a second pretilt angle antiparallel to the first pretilt angle; sealing a liquid crystal molecule and a photopolymerizable monomer within a space between the first photo alignment film and the second photo alignment film to form a liquid crystal panel; and performing a third irradiation treatment on the liquid crystal panel to carry out a polymerization of the photopolymerizable monomer.