Liquid Crystal Display Device with Polarization Control for Dual Image
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Solution Overview
Problem
Current liquid crystal display devices are inadequate for dual picture and three-dimensional display modes, lacking the ability to switch between different display modes effectively.
Innovation Solution
A liquid crystal display device incorporating a polarization control liquid crystal device with a liquid crystal layer between transparent electrodes, lenticular lenses, and retardation plates to control optical retardation and polarization axis rotation, allowing for dual image display and adjustable three-dimensional viewing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional single picture display mode is used, then the display structure is simple, but the device cannot achieve dual picture or three-dimensional display functionality
Solution Approach 1:
The liquid crystal display panel is divided into multiple independent liquid crystal layers, each capable of displaying different images. The first liquid crystal layer displays a first image while the second liquid crystal layer displays a second image, enabling dual picture display functionality through structural segmentation
Solution Approach 2:
Multiple liquid crystal layers are stacked in a nested configuration where each layer is positioned between transparent electrodes and optical compensation films. The layers are arranged sequentially with intermediate transparent electrodes, creating a multi-layer nested structure that enables three-dimensional display capability
2Adaptability or versatility
If multiple liquid crystal layers are stacked to achieve dual picture display, then display functionality is improved, but the device structure becomes more complex
Solution Approach 1:
The liquid crystal display device is designed to perform multiple functions using the same basic structural components. The same liquid crystal layer structure, transparent electrodes, and optical compensation films serve both dual picture display and three-dimensional display modes, reducing the need for separate specialized components for each function
Solution Approach 2:
The display mode is made dynamically switchable between two-dimensional dual picture mode and three-dimensional mode by controlling the liquid crystal molecules' orientation and optical properties. The liquid crystal layers can be electrically controlled to exhibit different optical characteristics, enabling dynamic mode transition without physical reconfiguration
3Manufacturing precision
If optical retardation control is implemented to enable three-dimensional display, then viewing quality is improved, but the manufacturing precision requirements increase
Solution Approach 1:
Optical compensation films with predetermined retardation values are pre-manufactured and positioned between the liquid crystal layers and the observer. These films are designed in advance to compensate for the optical anisotropy of the liquid crystal layers, ensuring proper optical performance without requiring high-precision control during final assembly
Solution Approach 2:
The optical retardation of the liquid crystal layers is controlled by changing electrical parameters (voltage, frequency) applied to the transparent electrodes rather than requiring precise mechanical or material parameter control during manufacturing. This allows dynamic adjustment of optical properties through electrical signals, simplifying manufacturing processes
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 efficient dual image recognition on a single display panel and facilitates switching between two-dimensional and three-dimensional display modes, enhancing information transmission efficiency.
Implementation Method 1
the polarization control liquid crystal device operates in an electrically controlled birefringence) mode and is provided on its back surface with the second retardation plate having the second optical retardation that is equal to an optical retardation caused when a voltage is applied to the liquid crystal layer
Implementation Method 2
a first polarizing plate that extracts linearly polarized light from the light source
Data Source
AI summary
This invention offers a liquid crystal display device with which each of a plurality of observers can visually recognize each of two different images displayed on a single liquid crystal display panel respectively. The liquid crystal display device of this invention includes a light source for backlighting, a first polarizing plate to extract linearly polarized light from the light source for backlighting, a polarization control LCD composed of a liquid crystal layer divided into a plurality of columns and controlling an optical retardation of each of the plurality of columns, lenticular lenses disposed along the columns, a first retardation plate in which a row having a first optical retardation and a row having another optical retardation that is different from the first optical retardation are disposed alternately, a display LCD and a second and a third polarizing plates between which the display LCD is interposed.