Multiple Steady State LCD Panel with Bipolar Alignment Molecules
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Solution Overview
Problem
Current LCD panels require continuous voltage supply to maintain display state, leading to high energy consumption and reduced battery life in mobile devices, especially when displaying static images.
Innovation Solution
A multiple steady state LCD panel design featuring a liquid crystal layer with positive liquid crystal molecules and bipolar low molecular weight alignment molecules, where the alignment is controlled by adjusting voltages applied to plane electrodes and horizontal electrodes, allowing the liquid crystals to maintain their state without continuous power, eliminating the need for polyimide alignment films.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If continuous voltage supply is applied to maintain display state, then display state is maintained, but energy consumption increases
Solution Approach 1:
The liquid crystal layer is segmented into multiple domains with different molecular orientations (first liquid crystal molecules aligned in first direction, second liquid crystal molecules aligned in second direction). This segmentation enables multiple stable display states without continuous voltage, as each domain can maintain its orientation independently after voltage removal.
Solution Approach 2:
The patent changes the physical-chemical parameters of the liquid crystal material by introducing chiral liquid crystal components and controlling molecular ratios. This creates liquid crystal compositions with specific helical structures and pitch values that enable multi-stable states, allowing the display to maintain images without continuous power supply.
2Stability of the object's composition
If polyimide alignment films are used to arrange liquid crystal molecules, then alignment is achieved, but device complexity increases
Solution Approach 1:
The patent extracts and eliminates the polyimide alignment film layer from the traditional LCD structure. Instead of using external alignment films, the alignment function is achieved through the intrinsic properties of the liquid crystal composition itself, including chiral molecules and surface treatment layers, thereby simplifying the overall device structure.
Solution Approach 2:
The liquid crystal composition is designed to self-align through its molecular characteristics (chirality, anisotropy) and interaction with surface treatment layers. The liquid crystal molecules automatically organize into desired orientations based on their inherent properties and the surface conditions, eliminating the need for separate polyimide alignment films that would otherwise be required to impose alignment.
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 reduces energy consumption and extends battery life in mobile devices by enabling static image display without continuous voltage supply, while maintaining effective alignment and display quality.
Implementation Method 1
the positive liquid crystal molecules are arranged at a specific angle under an alignment action of the bipolar low molecular weight alignment molecules
Implementation Method 2
a driving voltage is applied to the two substrates to control liquid crystal molecules of the liquid crystal layer which refracts light of a backlight module to produce pictures
Data Source
AI summary
The present application provides a multiple steady state LCD panel, in which a side of a first substrate close to a liquid crystal layer has a first plane electrode and spaced several horizontal electrodes disposed thereon, a side of a second substrate close to the liquid crystal layer has a second plane electrode disposed thereon; the liquid crystal layer includes plural positive liquid crystal molecules and bipolar low molecular weight alignment molecules; thus, to adopt PI materials for the horizontal or perpendicular alignment of the liquid crystal molecules is not needed for the present application. By adjusting one or two of the voltage applied to the first plane electrode and the second plane electrode and the voltage applied to any two of the horizontal electrodes, the positive liquid crystal molecules are arranged at a specific angle under an alignment action of the bipolar low molecular weight alignment molecules.