3D Display Beam Deflector Array for Light Field Reproduction
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Solution Overview
Problem
Existing 3D display technologies using light field mechanisms, such as holographic stereograms, require multiple projectors or mechanical movement and excessive calculations for fringe pattern recalculations, leading to unnatural images and eye fatigue.
Innovation Solution
A 3D display apparatus employing a beam scanner and a beam deflector array with diffraction or refractive optical structures to change light ray directions based on incident position, allowing for light field reproduction with a single pattern and reduced computational requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a holographic stereogram is used to reproduce light field, then directional distribution of light rays is achieved, but pixel size becomes too small and excessive calculations are required
Solution Approach 1:
The patent divides the beam deflector array into multiple beam deflectors, each handling a specific angular range. This segmentation allows each element to manage a portion of the light field reproduction task, reducing the complexity and pixel size requirements compared to a monolithic holographic approach.
Solution Approach 2:
The patent replaces the mechanical rotating mirror system with a static beam deflector array that uses optical diffraction and refraction principles. This substitution eliminates mechanical movement while achieving light field reproduction, and replaces excessive computational requirements for fringe pattern calculations with passive optical structures.
2Measurement precision
If multiple projectors are used to reproduce light field, then light ray distribution is improved, but device complexity increases
Solution Approach 1:
The patent combines multiple beam deflectors into a single integrated beam deflector array that processes light from a single source. This merging approach achieves the light field reproduction capability of multiple projectors while using only one projector, thereby reducing device complexity.
Solution Approach 2:
The beam deflector array serves multiple functions simultaneously: it diffracts light into multiple directions, refracts light rays to achieve angular distribution, and reproduces the light field pattern. This multi-functionality replaces what would otherwise require multiple separate projectors.
3Ease of operation
If a rotating mirror is used for light field reproduction, then light direction control is achieved, but mechanical movement is required making it unsuitable for flat panel displays
Solution Approach 1:
The patent replaces the mechanical rotating mirror with a static beam deflector array that uses optical principles (diffraction and refraction) to control light direction. This substitution maintains light direction control capability while eliminating all mechanical movement, making the system suitable for flat panel display integration.
Solution Approach 2:
The patent creates a dynamic light field reproduction system using static optical elements. The beam deflector array passively and dynamically redirects light rays into multiple directions without mechanical movement, achieving the functional equivalence of a rotating mirror system through optical rather than mechanical means.
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 display of more natural 3D images with reduced eye fatigue and eliminates the need for multiple projectors or mechanical movement, maintaining a consistent pattern for light field reproduction across different images.
Implementation Method 1
Each of the plurality of beam deflectors may include an array of diffraction gratings to diffract each of the light rays in the one of the plurality of different directions
Implementation Method 2
Each of the plurality of beam deflectors may include a refractor array to refract each of the light rays in the one of the plurality of different directions
Data Source
AI summary
Provided is a 3-dimensional (3D) display apparatus including a light source, a beam scanner, and a beam deflector array. The beam scanner scans light emitted by the light source, and the beam deflector array includes a plurality of beam deflectors arranged in an array to reproduce a light field by changing a direction of light rays scanned by the beam scanner.