Switchable Grating Image Displacement Device
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Solution Overview
Problem
Conventional image displacement devices suffer from high-frequency noises, vibrations, and reduced service life due to moving parts, and require complex re-designs for dimensional changes in passive components, limiting light utilization efficiency and image resolution.
Innovation Solution
An image displacement device utilizing switchable gratings, such as HPDLC cells, that adjust light paths without moving parts, allowing pixel image displacement and enhancing perceived resolution through diffraction effects, thereby simplifying the light path mechanism and adapting to dimensional changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If moving parts are used in conventional image displacement devices to adjust light paths, then image displacement and perceived resolution enhancement are achieved, but high-frequency noises and vibrations are generated that reduce service life
Solution Approach 1:
The patent replaces mechanical moving parts with a deformable grating structure that uses elastic deformation to achieve light path adjustment. The grating can be deformed by applying force or voltage, eliminating the need for mechanical motors, gears, or other moving components that generate noise and vibration. This substitution of mechanical systems with a field-controlled deformable structure directly resolves the contradiction by maintaining image displacement capability while eliminating harmful mechanical vibrations and noise.
2Ease of operation
If conventional light path adjustment mechanisms with moving parts are used, then image displacement is achieved, but considerable vibrations are generated that reduce service life
Solution Approach 1:
The patent eliminates mechanical moving parts by using a deformable grating that can be actuated by force or voltage to change its shape and thus redirect light paths. This substitution removes the source of vibrations entirely while preserving the image displacement function, directly addressing the contradiction between operational capability and harmful vibrations.
Solution Approach 2:
The grating structure is designed to be dynamically deformable, allowing it to change its configuration in response to applied forces or voltages. This dynamic capability enables image displacement without mechanical moving parts, as the grating itself adapts its shape to redirect light paths, eliminating vibrations while maintaining operational flexibility.
3Productivity
If conventional light path adjustment mechanisms are used, then image displacement is achieved, but light utilization efficiency cannot be further improved due to longer transition time
Solution Approach 1:
The patent replaces mechanical moving parts with a deformable grating that can be actuated by force or voltage to change its shape and redirect light paths. This substitution removes the source of vibrations entirely while preserving the image displacement function, directly addressing the contradiction between operational capability and harmful vibrations.
4Adaptability or versatility
If passive components such as light valves vary in dimensions, then updated dimensions require re-design of the image displacement device, but this complicates fabrication processes and assembly
Solution Approach 1:
The deformable grating structure serves multiple functions: it acts as both the optical element for light path adjustment and the structural component that can accommodate dimensional variations. By making the grating itself deformable and adaptable, the system can adjust to different component dimensions without requiring complete re-design, simplifying fabrication and assembly processes while maintaining adaptability.
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 effectively doubles or quadruples perceived image resolution, reduces noise and vibration, and extends component lifespan by using diffraction gratings for light path adjustments, while simplifying the mechanism and accommodating dimensional variations.
Implementation Method 1
Each of the first grating and the second grating is switchable between a diffracting state and a non-diffracting state
Data Source
AI summary
An image displacement device includes a first grating and a second grating. The first grating has a first surface and a second surface opposite the first surface, the first surface receives image beams, and the image beams leave the first grating by the second surface. The second grating is disposed downstream from the first grating in a light path and has a third surface and a fourth surface opposite the third surface. The third surface receives the image beams, and the image beams leave the second grating by the fourth surface. The image beams are projected to form a plane image comprised of pixels, each pixel is displaced in a direction by the image displacement device, and a displacement of each pixel is smaller than five times a width of one pixel.