Liquid Crystal Grating Simplified Fabrication via Component Rotation
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Solution Overview
Problem
The existing fabrication processes for liquid crystal gratings used in holographic 3D displays are complex and require different processes for attaching liquid crystal panels to half-wave plates, increasing design and fabrication difficulty and reducing production efficiency.
Innovation Solution
A simplified method involving two identical light adjustment components, each comprising a liquid crystal panel and a polarization adjustment component, where the components are oppositely disposed and configured to allow rotation, enabling the use of a single fabrication process for both, thereby simplifying the assembly and improving production efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If different fabrication processes are used to attach liquid crystal panels and half-wave plates, then the liquid crystal grating can be assembled, but the design and fabrication difficulty increases and production efficiency decreases
Solution Approach 1:
The patent combines the liquid crystal panel and half-wave plate into a single integrated light adjustment component. This merging eliminates the need for separate attachment processes, reducing fabrication complexity while maintaining the functional requirements of both components working together in the liquid crystal grating assembly
Solution Approach 2:
The light adjustment component is designed to perform multiple functions simultaneously - it acts as both the liquid crystal panel for light modulation and the half-wave plate for polarization control. This multi-functionality allows a single component to replace what previously required two separate components and their attachment, thereby simplifying the fabrication process
2Productivity
If two identical light adjustment components are used and oppositely disposed, then production efficiency increases, but precise alignment requirements are imposed
Solution Approach 1:
The patent employs asymmetric positioning of the two identical light adjustment components, disposing them in opposite orientations. This asymmetric arrangement allows the components to be manufactured using the same process (improving productivity) while their opposite disposal naturally accommodates the alignment requirements in the final assembly, as each component's orientation is specifically designed for its position in the grating 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 approach reduces the complexity of the fabrication process, lowers design and fabrication difficulties, and enhances the production yield and efficiency of liquid crystal gratings, facilitating the creation of effective holographic 3D displays.
Implementation Method 1
a spatial light modulator, configured to sequentially perform phase modulation and amplitude modulation on the light exited from the beam expanding/collimating component
Implementation Method 2
a first polarization adjustment component disposed on a first surface of the first liquid crystal panel; the second light adjustment component includes a second liquid crystal panel and a second polarization adjustment component
Data Source
AI summary
A liquid crystal grating and its fabrication method, and a display panel are provided in the present disclosure. The liquid crystal grating includes a first light adjustment component and a second light adjustment component, disposed oppositely. The first light adjustment component includes a first liquid crystal panel and a first polarization adjustment component; the second light adjustment component includes a second liquid crystal panel and a second polarization adjustment component; and using a second direction as an extending direction of a rotation axis, when the first light adjustment component is rotated 180° around the rotation axis, an alignment direction of the first liquid crystal panel is in parallel with an alignment direction of the second liquid crystal panel, and an optical axis direction of the first polarization adjustment component is in parallel with an optical axis direction of the second polarization adjustment component.