Switchable Diffuser Elements for 3D Image Rendering
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Solution Overview
Problem
Existing Multifocal Plane Display (MFD) devices face challenges in achieving high precision rendering of 3D images without requiring a high frame rate, which is a critical issue for commercial deployment.
Innovation Solution
The proposed solution involves a device and method using a diffuser with switchable diffuser elements to generate 3D images. The diffuser elements are individually controllable to be transmissive or diffusive based on a depth map, allowing for precise control of light beams to create a 3D image without the need for high frame rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If time-multiplexed MFD devices are used to display 3D images, then multiple focal planes can be achieved, but high frame rate is required which increases system requirements and computational load
Solution Approach 1:
The diffuser is segmented into multiple independently controllable diffuser elements arranged at different depths. Each diffuser element can be individually switched between transmissive and diffusive states, allowing selective activation of specific depth layers without requiring temporal multiplexing. This spatial segmentation enables high-precision 3D image rendering at lower frame rates.
Solution Approach 2:
The invention transitions from temporal multiplexing (switching focal planes over time) to spatial multiplexing (arranging diffuser elements at different depths in space). By distributing diffuser elements along the depth dimension and controlling them independently, the system achieves multifocal plane display without the high frame rate requirements of time-multiplexed approaches.
2Reliability
If switchable layers are used to display 3D images at different focal planes, then multifocal display is achieved, but system complexity and hardware design requirements increase
Solution Approach 1:
A single diffuser component performs multiple functions by incorporating diffuser elements at different depths within one structure. This unified diffuser can simultaneously or selectively display images at multiple focal planes, eliminating the need for separate switchable layers or multiple optical components, thereby reducing system complexity while maintaining multifocal display capability.
3Reliability
If high frame rate is used in time-multiplexed MFD devices, then flicker-free 3D image perception is achieved, but computational load and hardware requirements increase
Solution Approach 1:
The depth information is pre-calculated and stored in a depth map, which guides the selective activation of diffuser elements. This preliminary preparation of depth data allows the system to determine which diffuser elements to activate without requiring real-time computational processing at high frame rates, thereby reducing computational load while maintaining image quality.
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
This approach enables the rendering of high-precision 3D images with lower system requirements, reducing the computational load and achieving a lower frame rate compared to traditional time-multiplexed MFD devices.
Implementation Method 1
selective diffusing of the light beams creates the 3D image
Data Source
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AI summary
The invention relates to the technical field of Multifocal Plane Display (MFD) devices for displaying 3D images. In particular, the invention proposes a device for displaying a 3D image, wherein the 3D image is generated based on a 2D image and a depth map. The device includes a light source, a diffuser and a controller. The light source is configured to emit light beams, each light beam corresponding to a pixel of a 2D image. The diffuser is configured to diffuse the light beams, wherein the diffuser includes a plurality of diffuser elements distributed across a 3D volume, and each diffuser element is individually controllable to be transmissive or diffusive. The controller is configured to control each diffuser element to be transmissive or diffusive based on a depth map.