Switchable Liquid Crystal Cell for Naked Eye 3D Display
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Solution Overview
Problem
Current naked eye 3D display technologies, such as slit-type liquid crystal grating and columnar prism, face limitations in achieving effective image separation for stereoscopic displays without the need for glasses, and there is a need for a more efficient method to switch between 2D and 3D display modes.
Innovation Solution
A liquid crystal cell with a diffraction phase grating array on one substrate and stacked electrode layers on the other, where the refractive index of the liquid crystal units can be controlled between minimum and maximum by applying voltage, allowing the cell to function as either a diffraction lens or a flat glass, enabling switchable 2D and 3D display capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If slit-type liquid crystal grating or columnar prism is used for naked eye 3D display, then image separation for 3D viewing is achieved, but the ability to switch between 2D and 3D modes is limited
Solution Approach 1:
The patent applies the dynamics principle by making the liquid crystal cell's optical properties changeable through voltage control. The liquid crystal molecules can be switched between different alignment states (parallel or perpendicular to substrate) by applying different voltages, which dynamically changes the refractive index and thus the diffraction effect. This enables the display to switch between 2D and 3D modes without changing the physical structure, resolving the contradiction between versatility and complexity.
Solution Approach 2:
The patent employs parameter changes by controlling the refractive index of the liquid crystal through voltage application. By changing the voltage parameter, the refractive index changes, which in turn changes the diffraction angle and enables switching between 2D and 3D display modes. This parameter-based control approach achieves versatility while maintaining relatively simple device structure.
2Measurement precision
If diffraction phase grating array is used, then image separation efficiency is improved, but manufacturing precision requirements increase
Solution Approach 1:
The patent applies preliminary action by pre-forming the diffraction phase grating array structure on the substrate before filling with liquid crystal material. The grating structure is created with specific geometric parameters (period, depth, shape) that are optimized for the desired diffraction effect. This preliminary structuring ensures that once liquid crystal is filled, the image separation precision is achieved without requiring high precision during the liquid crystal filling process, thus reducing manufacturing precision requirements while maintaining image separation quality.
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 liquid crystal cell effectively separates images for 3D viewing without glasses and allows seamless switching between 2D and 3D modes by controlling the refractive index, enhancing display versatility and user experience.
Implementation Method 1
the refractive index of the liquid crystal unit relative to the incident polarized light switches between the minimum refractive index and the maximum refractive index by controlling whether a predetermined voltage is applied
Implementation Method 2
a diffraction phase grating array on a surface of the first substrate close to the second substrate, wherein the diffraction phase grating array is filled with liquid crystal units
Implementation Method 3
the incident polarized light switches between the minimum refractive index and the maximum refractive index; a polarizer on a light incident side of the liquid crystal cell
Data Source
AI summary
This disclosure proposes a liquid crystal cell, a display and an electronic device. The liquid crystal cell comprises a first substrate and a second substrate disposed above the first substrate. The first substrate is configured to be formed with a diffraction phase grating array on a surface thereof close to the second substrate, and the diffraction phase grating array is filled with liquid crystal units. The second substrate is configured to comprise stacked first electrode layer, insulating layer and second electrode layer on a side thereof close to the first substrate.