Liquid Crystal Display Panel With Differential Anchoring
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Solution Overview
Problem
Liquid crystal display panels using horizontal electric field modes, such as IPS and FFS, require further improvements in response speed and display brightness, with existing methods like adjusting anchoring strength and forming polymer networks in the liquid crystal layer not fully addressing these needs.
Innovation Solution
A liquid crystal display panel configuration with a first and second substrate, a liquid crystal layer, and a polymer network that anchors or does not anchor liquid crystal molecules differently in various regions, combined with alignment films of varying anchoring strengths and a method of manufacturing involving a photocurable resin and ultraviolet light curing, to enhance response speed and brightness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the anchoring strength of the alignment film covering the electrode generating a horizontal electric field is reduced to improve response speed, then the falling speed improves, but the alignment control precision deteriorates
Solution Approach 1:
The patent applies different anchoring strengths to different regions of the liquid crystal layer. Specifically, the first alignment film has a first anchoring strength, the second alignment film has a second anchoring strength, and the polymer network creates a third anchoring strength in the phase separation region. This local differentiation allows the electrode region to have lower anchoring for faster response while other regions maintain appropriate anchoring for alignment control.
Solution Approach 2:
The liquid crystal layer is segmented into multiple regions with different anchoring characteristics: a first region adjacent to the first alignment film, a second region adjacent to the second alignment film, and a third region between them containing the polymer network. This segmentation enables independent optimization of each region's anchoring strength to balance response speed and alignment precision.
2Speed
If a polymer network is formed in the liquid crystal layer through phase separation to improve falling speed, then the response speed improves, but the device complexity increases
Solution Approach 1:
The patent utilizes phase separation of the liquid crystal material to form a polymer network within the liquid crystal layer. This phase transition approach creates regions with different molecular ordering and anchoring characteristics, improving falling speed while leveraging the self-organizing properties of the liquid crystal system rather than requiring complex external structures.
Solution Approach 2:
The liquid crystal material itself performs the function of creating the polymer network through its phase separation behavior. The material autonomously forms the required structural complexity without requiring additional external components or complex manufacturing processes, thus improving performance while limiting the increase in device complexity.
3Ease of operation
If different anchoring strengths are applied in different regions of the liquid crystal layer, then the response speed and alignment control are optimized, but the manufacturing precision requirements increase
Solution Approach 1:
The patent implements local quality by assigning different anchoring strengths to specific regions: the first alignment film region, the second alignment film region, and the polymer network region. This localized differentiation optimizes alignment control in each region while the patent acknowledges that achieving this requires precise control during manufacturing, particularly in controlling the degree of phase separation and polymer network formation.
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 described configuration improves response speed and display brightness by allowing liquid crystal molecules to easily change alignment in response to electric fields and optimizing polymer network density and anchoring strengths, resulting in enhanced performance.
Implementation Method 1
the polymer network anchors or does not anchor liquid crystal molecules in a first liquid crystal region that is in the liquid crystal layer and is adjacent to the first alignment film with an azimuthal anchoring strength lower than liquid crystal molecules in a second liquid crystal region
Implementation Method 2
the first alignment film has an azimuthal anchoring strength lower than the second alignment film
Implementation Method 3
a first electrode and a second electrode provided on the first dielectric substrate and capable of generating a horizontal electric field in the liquid crystal layer
Implementation Method 4
a method of manufacturing involving a photocurable resin and ultraviolet light curing
Data Source
AI summary
The liquid crystal display panel includes a first substrate, a second substrate, and a liquid crystal layer provided between the first substrate and the second substrate. The first substrate includes a first dielectric substrate, a first electrode and a second electrode provided on the first dielectric substrate and capable of generating a horizontal electric field in the liquid crystal layer, and a first alignment film being in contact with the liquid crystal layer. The second substrate includes a second dielectric substrate and a second alignment film provided on the second dielectric substrate and being in contact with the liquid crystal layer. The first alignment film has an azimuthal anchoring strength lower than the second alignment film. The liquid crystal layer includes a nematic liquid crystal material and a polymer network.