Stereoscopic Display Device With Crossed Barrier Patterns
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Solution Overview
Problem
Existing electrically-driven liquid crystal lenses face challenges in creating a gentle parabolic electric field for a smooth lens surface and are limited to uni-directional 3D display, making them unsuitable for dual view displays and prone to incorrect image perception if the viewer deviates from the binocular disparity range.
Innovation Solution
A stereoscopic display device with barriers crossing each other on two substrates, where voltage is applied to selectively drive liquid crystals between the substrates, enabling 3D display through one barrier and dual view display through the other, using equidistantly arranged electrodes on each substrate to control light transmission and perception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single barrier pattern is used in existing liquid crystal lenses, then the device structure is simple, but the display functionality is limited to uni-directional 3D display only
Solution Approach 1:
The single barrier pattern is segmented into two separate barrier patterns (first and second barriers) with different orientations. The first barrier includes electrodes extending in a first direction while the second barrier includes electrodes extending in a second direction crossing the first direction. This segmentation enables independent control of each barrier to achieve different display modes (3D or dual view), resolving the contradiction between display versatility and structural simplicity.
Solution Approach 2:
The barrier structure is designed with multi-functionality by incorporating two barrier patterns that can be selectively activated. By applying different voltages to the first and second barriers, the system can switch between 3D display mode (using one barrier) and dual view display mode (using the other barrier), making the device adaptable to multiple display requirements without requiring separate devices.
2Manufacturing precision
If voltage is applied to create a parabolic electric field for lens effect, then light path control is achieved, but the electric field distribution becomes non-uniform affecting image quality
Solution Approach 1:
Different regions of the liquid crystal layer are subjected to different electric field strengths by independently controlling the voltage applied to the first and second barriers. The barrier electrodes are positioned and dimensioned to create localized electric field distributions that compensate for the inherent non-uniformity, ensuring uniform light transmission and high image quality across the entire display area.
3Reliability
If the viewer deviates from the binocular disparity range in uni-directional 3D display, then the display structure remains simple, but incorrect image perception occurs
Solution Approach 1:
The display system dynamically switches between different barrier patterns based on the required viewing mode. The first barrier is activated for standard 3D display within binocular disparity range, while the second barrier is activated for dual view display to accommodate viewers outside the standard range. This dynamic switching ensures reliable image perception across different viewing conditions without requiring a permanently complex 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
The device achieves selective 3D and dual view displays by adjusting electrode voltages, ensuring accurate image perception across different viewer positions without additional panels, reducing the risk of incorrect images and allowing for various display types within a binocular disparity range.
Implementation Method 1
a lens is designed to control a path of incident light on a per position basis using a difference between a refractive index of a lens constituent material and a refractive index of air. In the electrically-driven liquid crystal lens, if different voltages are applied to electrodes located at different positions of the liquid crystal layer so as to create an electric field required to drive the liquid crystal layer, incident light introduced into the liquid crystal layer undergoes different phase variations on a per position basis, and as a result, the liquid crystal layer is able to control the path of the incident light in the same manner as an actual lens.
Implementation Method 2
Liquid crystal molecules of the liquid crystal layer are driven by an electric field created when voltages are applied to the two electrodes. The liquid crystal molecules have polarization and optical anisotropy characteristics. Here, polarization refers to a change in molecular arrangement direction according an electric field, which is a change in molecular arrangement direction according an electric field, which is caused as electrons in liquid crystal molecules are gathered to opposite sides of the liquid crystal molecules when the liquid crystal molecules are under the influence of an electric field.
Implementation Method 3
optical anisotropy refers to a change in path or polarization of light to be emitted according to an incidence direction or polarization of incident light, which is caused by an elongated shape of liquid crystal molecules and the above-mentioned molecular arrangement direction.
Implementation Method 4
voltage is applied to the barrier pattern to drive liquid crystals between the two substrates such that one of the barriers is selectively driven, enabling selective implementation of 3-dimensional (3D) display and dual view display.
Data Source
AI summary
Disclosed is stereoscopic display device in which barriers crossing each other are formed on two substrates and voltage is applied to the barrier pattern to drive liquid crystals between the two substrates such that one of the barriers is selectively driven, enabling selective implementation of 3-dimensional (3D) display and dual view display.