Polarization Control Unit Partition Wall Polymer Spacer
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Solution Overview
Problem
Current polarization control units in 2D/3D image displays face issues with luminance loss, optical efficiency due to color diffusion and light leakage, and risk of electrode contact due to substrate bending or pressure, making it difficult to optimize retardation and maintain appropriate substrate distance.
Innovation Solution
A polarization control unit with a polymer-dispersed liquid crystal layer between substrates, featuring a refractive index of 0.15 to 0.18 and thickness of 5.9 μm to 10.8 μm, and a partition wall formed by curing a polymer material, which controls light polarization and prevents electrode contact by maintaining appropriate substrate separation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the distance between upper and lower substrates is reduced to improve compactness, then device size is reduced, but the substrates may be shorted due to bending or external pressure
Solution Approach 1:
A polymer layer is introduced as an intermediary between the upper and lower substrates. This polymer layer serves as a spacer that maintains a controlled distance between substrates while preventing direct contact and shorting. The polymer material provides mechanical cushioning and electrical insulation, allowing the substrates to be positioned closer together without compromising reliability.
Solution Approach 2:
The patent optimizes the thickness and material properties of the polymer layer to achieve the desired balance between compactness and reliability. By carefully selecting the polymer's mechanical properties and thickness, the design maintains substrate separation under various conditions including bending and external pressure.
2Volume of moving object
If the upper and lower substrates are positioned closer to reduce device size, then compactness is improved, but retardation uniformity deteriorates due to bending and thickness variations
Solution Approach 1:
The polymer layer acts as a mediator that compensates for substrate bending and thickness variations. By positioning the polymer between the substrates, it maintains a more uniform separation distance throughout the device area, thereby improving retardation uniformity even when substrates are placed closer together.
Solution Approach 2:
The patent adjusts the polymer layer's thickness and material parameters to compensate for geometric variations in the substrate assembly. This allows optimization of the overall device thickness while maintaining uniform optical retardation across the entire display area.
3Device complexity
If no partition wall is used to simplify structure, then device complexity is reduced, but optical efficiency deteriorates due to color diffusion and light leakage
Solution Approach 1:
The polymer layer is segmented into multiple functional regions including partition walls that separate different functional zones. This segmentation prevents optical cross-talk and light leakage between adjacent areas, thereby improving overall optical efficiency without requiring complex additional structures.
Solution Approach 2:
The polymer layer serves as an intermediary that optically isolates different regions of the display. By positioning it between the substrates and incorporating partition walls, it prevents light leakage and color diffusion while maintaining a relatively simple overall structure.
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 configuration enhances optical efficiency by reducing color diffusion and light leakage while preventing electrode contact, thereby improving the display's ability to switch between 2D and 3D modes with reduced product defects.
Implementation Method 1
The polymer alignment in the liquid crystal layer can be controlled by applying a voltage to the polarization control unit, thereby controlling light scattering and transmission
Implementation Method 2
a polarization control unit for representing a 3D image and polarizing lenses
Implementation Method 3
a partition wall and a polymer-dispersed liquid crystal layer between the first and second electrodes
Data Source
AI summary
Disclosed is a display device that may include a display panel; a polarization control unit on the display panel, the polarization control unit including: a first substrate; a second substrate opposite the first substrate; a first electrode on a surface of the first substrate opposing the second substrate; a second electrode on a surface of the second substrate opposing the first substrate; and a partition wall and a polymer-dispersed liquid crystal layer between the first and second electrodes, wherein liquid crystal molecules of the polymer-dispersed liquid crystal layer are arranged in a space defined by the partition wall.