Diffractive Lens 2D to 3D Mode Switching via Fresnel Zone Plate
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Solution Overview
Problem
Current 2D/3D image display devices lack an efficient method to seamlessly switch between two-dimensional and three-dimensional modes using a diffractive lens, as existing technologies rely on refraction rather than diffraction, which limits their ability to effectively divide the vision field for 3D image recognition.
Innovation Solution
An image display device incorporating a diffractive lens that utilizes the optical principle of a Fresnel zone plate to modify light paths, combined with a liquid crystal diffractive lens and anisotropic diffractive lens, which can be controlled to switch between 2D and 3D modes by adjusting the alignment of liquid crystal molecules and polarization, respectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a conventional lens using refraction is used to divide the vision field, then the device structure is simple, but the ability to effectively divide the vision field for 3D image recognition is limited
Solution Approach 1:
The patent replaces the conventional refraction-based lens with a diffractive lens that uses diffraction of light. This substitution of optical principle enables more precise vision field division for 3D image recognition while maintaining device structure simplicity through the Fresnel zone plate design.
Solution Approach 2:
The patent changes the optical parameter from refraction to diffraction by using a Fresnel zone plate structure. This parameter change allows the lens to effectively divide the vision field into left and right eye images, improving 3D image recognition capability.
2Manufacturing precision
If a diffractive lens with larger thickness is used to achieve better diffraction effect, then the 3D image recognition is improved, but the device thickness and cell gap increase
Solution Approach 1:
The patent transitions from conventional thick lens design to a thin-film diffractive lens structure. By using the Fresnel zone plate pattern in a thin film, the patent achieves effective diffraction for 3D image recognition without increasing device thickness or cell gap.
Solution Approach 2:
The patent employs a thin-film diffractive lens structure with Fresnel zone plate pattern. This thin film approach enables effective diffraction for separating left and right eye images while maintaining reduced device thickness and improved productivity.
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 switching between 2D and 3D modes by effectively dividing the vision field using diffraction, improving the recognition of 3D images while reducing the thickness and cell gap of the diffractive lens, thus enhancing productivity and image resolution.
Implementation Method 1
a diffractive lens for the image of the display panel to be recognized as a 2D image or a 3D image, wherein the diffractive lens modifies a path of light by using an optical principle of a Fresnel zone plate
Implementation Method 2
the diffractive lens modifies a path of light by using an optical principle of a Fresnel zone plate
Implementation Method 3
combined with a liquid crystal diffractive lens and anisotropic diffractive lens, which can be controlled to switch between 2D and 3D modes by adjusting the alignment of liquid crystal molecules and polarization, respectively
Implementation Method 4
combined with a liquid crystal diffractive lens and anisotropic diffractive lens, which can be controlled to switch between 2D and 3D modes by adjusting the alignment of liquid crystal molecules and polarization, respectively
Data Source
AI summary
The present invention relates to an image display device using a diffractive lens. An image display device according to an exemplary embodiment of the present invention includes a display panel displaying an image, and a diffractive lens for the image of the display panel to be recognized as a two-dimensional (2D) image or a three-dimensional (3D) image, wherein the diffractive lens modifies a path of light by using an optical principle of a Fresnel zone plate.