Liquid Crystal Grating Module for Multi-Directional 3D Display
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Solution Overview
Problem
Two dimension-three dimension switchable liquid crystal display devices can only produce three-dimensional images in one direction, limiting user perception.
Innovation Solution
A liquid crystal grating module with a first transparent electrode layer and a second transparent electrode layer, featuring alternately superposed lateral and vertical electrode bars with varying widths, forming a grating structure to enable three-dimensional image perception in both vertical and horizontal directions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single direction grating structure is used, then the device complexity is reduced, but the adaptability for three-dimensional perception in multiple directions is limited
Solution Approach 1:
The patent combines two grating structures with different orientations (first grating structure and second grating structure) into a single integrated liquid crystal grating module. The first transparent electrode layer forms one grating structure while the second transparent electrode layer forms another, and both are activated simultaneously to provide three-dimensional perception capability in multiple directions without requiring separate devices
Solution Approach 2:
The liquid crystal grating module is designed to perform multiple functions: it can provide three-dimensional perception in both vertical and horizontal directions, and it can also switch to two-dimensional display mode. The same module serves as both a multi-directional 3D grating and a 2D display controller, eliminating the need for separate structures for different viewing directions
2Adaptability or versatility
If nontransparent stripes are used in the parallax barrier, then the three-dimensional image directionality is achieved, but color cast occurs due to light obstruction
Solution Approach 1:
The patent changes the optical properties of the grating structure by using transparent electrode bars instead of nontransparent stripes. The electrode bars can be activated to change from transparent to opaque state, allowing light to pass through or be blocked selectively. This eliminates color cast while maintaining the ability to control light direction for three-dimensional perception
Solution Approach 2:
The patent changes the physical state parameter of the grating elements from permanently nontransparent to controllable transparent/opaque state. By applying voltage to the transparent electrode bars, their optical transmission parameter can be dynamically changed, allowing them to function as light guides when activated and as transparent elements when deactivated, thus avoiding color cast
3Object-affected harmful factors
If transparent electrode bars are used instead of nontransparent stripes, then color cast is avoided, but the light guiding capability for three-dimensional perception must be enhanced
Solution Approach 1:
The patent introduces liquid crystal material as an intermediary between the transparent electrode bars and the light. The liquid crystal layer, when activated, works with the electrode bars to guide light in specific directions. This intermediary enables the transparent electrode structure to achieve effective light guiding for three-dimensional perception without requiring the electrode bars themselves to be opaque
Solution Approach 2:
The patent creates a composite structure combining transparent electrode bars with liquid crystal material and polarizing films. This composite system leverages the optical properties of each material: the transparent electrodes provide structural integrity and controllable opacity, the liquid crystal provides directional light control, and the polarizing films enhance the light guiding effect, together achieving efficient light guiding without color cast
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
Enables three-dimensional image perception from both directions while avoiding color cast by providing equal sub-pixel regions, allowing for efficient two-dimensional to three-dimensional switching.
Implementation Method 1
a liquid crystal layer and a polarizing film are needed, and a sequence of vertical stripes perpendicular in the direction of optical rotation are produced with the liquid crystal layer and a layer of the polarizing film
Implementation Method 2
a sequence of vertical stripes perpendicular in the direction of optical rotation are produced with the liquid crystal layer and a layer of the polarizing film
Implementation Method 3
Turning off the liquid crystal switch, the display may become an ordinary two-dimensional one
Data Source
AI summary
A liquid crystal grating module (3) and a two dimension-three dimension switchable liquid crystal display device using the same. The liquid crystal grating module (3) comprises a first transparent electrode layer (20) and a second transparent electrode layer (50). The first transparent electrode layer (20) and the second transparent electrode layer (50) are provided with interval. The first transparent electrode layer (20) comprises a plurality of lateral electrode bars (202,204). The second transparent electrode layer (50) comprises a plurality of vertical electrode bars (502,504). The lateral electrode bars (202,204) and the vertical electrode bars (502,504) are alternately superposed on each other with interval to form a grating structure. The vertical electrode bars (502,504) have three different widths in the direction vertical to the liquid crystal display pixels.