Tri-state LCD Panel with Four Electrodes for Privacy
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Solution Overview
Problem
Current liquid crystal display panels only offer two display modes, transition state and dark state, limiting their ability to ensure both display and privacy functions simultaneously, thus restricting their applications.
Innovation Solution
A tri-state liquid crystal display panel is developed, incorporating a polymer network liquid crystal layer and four independently-controllable electrodes, enabling transmission, dark, and haze state display modes with horizontal or vertical electric fields or without any electric field, thereby expanding its applications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If current liquid crystal display panels use only two display modes (transition state and dark state), then the device complexity is reduced, but the adaptability and versatility are limited
Solution Approach 1:
The patent divides the electrode system into four independently controllable electrodes (first electrode, second electrode, third electrode, and fourth electrode) instead of using a single electrode structure. This segmentation enables independent control of each electrode to generate different electric field configurations, thereby achieving three distinct display modes (transition state, dark state, and haze state) within a single display panel.
Solution Approach 2:
The patent implements dynamic control of the display mode by independently adjusting the voltage applied to each of the four electrodes. By dynamically changing the electric field configuration through variable voltage control, the display panel can switch between transmission state, dark state, and haze state modes, enhancing adaptability to different application scenarios.
2Adaptability or versatility
If four independently-controllable electrodes are added to achieve three display modes, then the adaptability is improved, but the device complexity increases
Solution Approach 1:
The four electrodes in the patent serve multiple functions: they can be independently controlled to generate horizontal electric fields, vertical electric fields, or no electric field, thereby achieving three different display modes (transition state, dark state, and haze state) with a single electrode structure. This multi-functionality reduces the need for separate structures for each display mode.
Solution Approach 2:
The patent achieves different display modes by changing the voltage parameter applied to the electrodes. By independently adjusting the voltage on each of the four electrodes, the system can dynamically switch between transmission state, dark state, and haze state, providing adaptability without requiring physical structural changes.
3Adaptability or versatility
If polymer network liquid crystals are used to enable three display modes, then the functionality is enhanced, but the manufacturing precision requirements increase
Solution Approach 1:
The patent uses polymer network liquid crystals as the liquid crystal material, which combines liquid crystal molecules with polymer networks. This composite material structure enables the liquid crystal to respond to electric fields in multiple configurations, facilitating the achievement of three distinct display modes (transition state, dark state, and haze state) while maintaining material stability.
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 tri-state liquid crystal display panel effectively provides three display modes, enhancing its versatility and application possibilities by ensuring both display functionality and privacy protection.
Implementation Method 1
the liquid crystal layer includes a plurality of polymer network liquid crystals... with horizontal electric fields or vertical electric fields or without any electric field
Implementation Method 2
the liquid crystal layer includes a plurality of polymer network liquid crystals
Implementation Method 3
The first polarizer is disposed on the first substrate and has a first polarization axis. The second polarizer is disposed on the second substrate and has a second polarization axis
Data Source
AI summary
A tri-state liquid crystal display panel includes a first substrate, a second substrate, a liquid crystal layer, a first electrode, a second electrode, a third electrode and a fourth electrode. The first substrate and the second substrate are disposed oppositely. The liquid crystal layer disposed between the first substrate and the second substrate includes a plurality of polymer network liquid crystals. The first electrode is disposed between the first substrate and the liquid crystal layer, the second electrode is disposed between the second substrate and the liquid crystal layer, and the first and second electrodes include planar electrodes. The third and fourth electrodes are disposed between the first substrate and the liquid crystal layer, and the third and fourth electrodes include patterned electrodes. The tri-state liquid crystal display panel has a transmission state display mode, a dark state display mode and a haze state display mode.