Double-Layered Liquid Crystal Lens 3D to 2D Mode Switching
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Solution Overview
Problem
Existing liquid crystal lenses have a slow response time when switching from 3D to 2D display mode due to the capacitance and rotational viscosity of liquid crystal molecules, which affects display quality and resolution.
Innovation Solution
A double-layered liquid crystal lens design is introduced, featuring two liquid crystal layers with transparent electrodes on either side of a central substrate, allowing for independent control of electric fields to form lenticular lens structures. In 3D mode, the first layer forms convex lenses, and in 2D mode, the second layer forms mirror-symmetric concave lenses to compensate for phase delays, reducing response time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If electric field is removed to allow liquid crystal molecules to relax back to initial state, then 2D display mode is achieved, but response time becomes too long (more than 1 second)
Solution Approach 1:
The liquid crystal lens is divided into two separate liquid crystal layers (first and second layers) with independent electrode control. This segmentation allows the second layer to be independently activated to accelerate the return to initial state, resolving the contradiction between maintaining display quality and reducing response time.
Solution Approach 2:
The second liquid crystal layer is pre-configured with electrodes that can be activated in advance to create an electric field that accelerates the return of liquid crystal molecules to their initial state. This preliminary preparation of the acceleration mechanism resolves the time delay issue while maintaining optical quality.
2Adaptability or versatility
If liquid crystal molecules are driven by electric field to form lenticular lens structure, then 3D display mode is achieved, but switching back to 2D mode becomes slow due to capacitance and rotational viscosity
Solution Approach 1:
The system is segmented into two independently controllable liquid crystal layers. The first layer maintains the lenticular structure for 3D mode, while the second layer can be independently activated to accelerate the transition back to 2D mode, thus improving switching speed without sacrificing adaptability.
Solution Approach 2:
The second liquid crystal layer acts as an intermediary mechanism that facilitates the transition from 3D to 2D mode. By introducing this intermediate layer with its own electrode system, the patent creates a mediation mechanism that speeds up the switching process while preserving the full functionality of both display modes.
3Productivity
If single liquid crystal layer is used, then device structure remains simple, but response time during mode switching becomes unacceptably long
Solution Approach 1:
The liquid crystal system is segmented into two layers with independent electrode control. This segmentation increases productivity (response speed) by enabling accelerated return to initial state, while the modular nature of the segmentation keeps the added complexity manageable and structured.
Solution Approach 2:
The patent transitions from a single-layer structure to a two-layer structure, adding a dimensional aspect to the system architecture. This dimensional change enables independent control of each layer, improving response speed while organizing the increased complexity into a structured, manageable configuration.
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 significantly reduces the response time when switching from 3D to 2D mode, improving display quality by actively controlling liquid crystal molecule deflection with electric fields, rather than relying on molecular relaxation, thus enhancing the display's speed and resolution.
Implementation Method 1
due to the fact that liquid crystal molecules have a birefringence property and the alignment direction thereof is changed as the electric field applied thereon varies, light can be focused or diffused
Implementation Method 2
under the effect of an electric field, a long axis of a liquid crystal molecule is aligned along the direction of the electric field lines
Implementation Method 3
liquid crystal molecules have a birefringence property and the alignment direction thereof is changed as the electric field applied thereon varies
Implementation Method 4
a voltage is applied across the third and fourth transparent electrodes to generate an electric field, so that liquid crystal molecules in the second liquid crystal layer are deflected by the electric field
Data Source
AI summary
A double-layered liquid crystal lens in which two liquid crystal layers are disposed, and a 3D display apparatus. In a 3D display mode, under control of an electric field, liquid crystal molecules of a first liquid crystal layer are deflected to form a plurality of first lenticular lens structures. In case of switching from the 3D display mode into a 2D display mode, under the control of an electric field, liquid crystal molecules in a second liquid crystal layer are deflected to form a plurality of second lenticular lens structures; the second lenticular lens structures are mirror symmetric to the corresponding first lenticular lens structures, so as to compensate a phase delay of a light modulated by the first lenticular lens structures, such that the light passes through the double-layered liquid crystal lens without deflection, and thus a normal 2D display state is realized.