Diffractive Device for 2D-3D Switching
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Solution Overview
Problem
Conventional 3D image display devices that combine lenses and barriers have increased volume, making them undesirable for mass production and requiring complex arrangements to achieve both 2D and 3D modes.
Innovation Solution
An image display device incorporating a diffractive device with a plurality of unit devices that alternate between lens and barrier modes, utilizing a liquid crystal layer and electrode arrays to control light transmission and phase delay, allowing the device to operate in both 2D and 3D modes without the need for separate lenses and barriers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If both lens and barrier are included in the display device, then 3D image display capability is improved, but device volume increases
Solution Approach 1:
The patent combines the lens and barrier functions into a single integrated diffractive device. The diffractive device includes a liquid crystal layer with electrode patterns that can be controlled to function as either a lens or a barrier, eliminating the need for separate components and reducing overall device volume.
Solution Approach 2:
The diffractive device is designed to perform multiple functions - it can operate as a lens to refract light for 3D image formation, as a barrier to block light for eye separation, or in intermediate states. This multi-functionality allows a single component to replace what would traditionally require separate lens and barrier elements.
2Adaptability or versatility
If separate lens and barrier components are used, then 3D mode functionality is improved, but device complexity increases
Solution Approach 1:
The patent merges the control of light refraction (lens function) and light blocking (barrier function) into a single diffractive device with a unified liquid crystal layer and electrode structure. This integration simplifies the overall device architecture by eliminating the need for separate control systems for lens and barrier components.
Solution Approach 2:
The diffractive device dynamically switches between lens mode and barrier mode through voltage control of the liquid crystal layer. The electrode patterns can be selectively activated to change the device function in real-time, allowing flexible transition between 2D and 3D display modes without physical reconfiguration.
3Volume of stationary object
If lens and barrier are integrated in one device, then volume is reduced, but manufacturing difficulty increases
Solution Approach 1:
The diffractive device is segmented into multiple unit devices, each containing a liquid crystal layer with specific electrode patterns. This segmentation allows for modular manufacturing and assembly, where each unit can be produced independently and then combined to form the complete display device, simplifying the manufacturing process despite the integrated functionality.
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 solution enables a compact image display device that can easily switch between 2D and 3D modes, reducing volume and simplifying production, while maintaining effective light refraction and transmission for a wide range of viewing angles.
Implementation Method 1
a liquid crystal layer interposed between the first substrate and the second substrate
Implementation Method 2
The unit device may periodically alternate between operating in the lens mode and the barrier mode. When the unit device operates in the lens mode, the applied voltage may cause the unit device to operate as a Fresnel zone plate
Implementation Method 3
The diffractive device is configured to operate in a 2D mode to enable the image of the display panel to be perceived as a 3D image
Implementation Method 4
An image display device incorporating a diffractive device with a plurality of unit devices that alternate between lens and barrier modes, utilizing a liquid crystal layer and electrode arrays to control light transmission and phase delay
Data Source
AI summary
An image display device includes a display panel displaying an image and a diffractive device. The diffractive device operates in a 2D mode to enable perception of a 2D image from the image of the display panel and in a 3D mode to enable perception of the image of the display panel as a 3D image. The diffractive device includes a plurality of unit devices. When the diffractive device operates in 3D mode, at least one of the plurality of unit devices operates in a lens mode and a barrier mode during different periods.