Rotating Mirror 3D Display System for Omnidirectional Viewing
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Solution Overview
Problem
Current 3D display technologies using directional light face challenges in maintaining resolution across a wider range, particularly with lenticular arrays and multiple projectors, which either degrade resolution or increase costs and complexity.
Innovation Solution
A 3D display device incorporating a high-speed projector, rotating mirrors, and a cylindrical holographic screen or mirror, with an operation control unit to generate and synchronize directional light field images, allowing for omnidirectional viewing without resolution deterioration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a lenticular array and FPD are used for 3D display, then directional light field can be achieved, but resolution in a single direction decreases by 1/number of directions
Solution Approach 1:
The patent employs a rotating mirror that dynamically changes the direction of projected light over time. By rotating the mirror at high speed, the system can direct light to different angular positions sequentially, achieving multi-directional 3D display without sacrificing resolution in any single direction, as each direction receives full-resolution light during its designated time slot.
Solution Approach 2:
The system uses periodic rotation of the mirror to cycle through different viewing directions. The high-speed projector synchronizes its frame output with the mirror rotation period, projecting different angular views at specific phases of the rotation cycle. This periodic action enables the display to cover multiple directions while maintaining full resolution for each direction during its active phase.
2Area of stationary object
If multiple projectors are used to expand display region, then costs increase and color, location, and relative positions are difficult to correct
Solution Approach 1:
Instead of using multiple static projectors, the patent uses a single high-speed projector combined with a dynamically rotating mirror. The mirror's rotation enables one projector to cover the angular range that would otherwise require multiple projectors, reducing system complexity while expanding the effective display region through temporal multiplexing of the light path.
Solution Approach 2:
The rotating mirror serves multiple functions: it acts as a beam splitter, a directional controller, and a synchronization element. A single projector system with the rotating mirror can perform the work of multiple projectors by directing light to different spatial positions at different times, making the system more universal and easier to control regarding color, location, and relative positioning.
3Manufacturing precision
If a high speed projector and rotating mirror are used to embody directional ray, then display region is limited to swept volume of the mirror
Solution Approach 1:
The patent transitions from a static 2D display plane to a 3D volumetric display space by introducing the rotating mirror dimension. The mirror rotation adds a temporal and angular dimension to the light projection, allowing the system to sweep through a volume in space rather than being confined to a single plane, thereby expanding the display region while maintaining directional precision through synchronized control.
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 the display of 3D images in a wider region with maintained resolution, supporting multiple users and reducing visual fatigue through natural motion parallax without the need for glasses.
Implementation Method 1
a rotating mirror, reflected light from which is transmitted to a rotating lens
Implementation Method 2
the reflected light may pass through the rotating lens to be reflected at the reflecting mirror and then be projected towards the display unit
Implementation Method 3
a cylindrical reflecting mirror to form a side surface of the optical system
Implementation Method 4
a display unit has a cylindrical shape, and a side surface of the display unit includes a holographic screen
Data Source
AI summary
A three-dimensional (3D) display device and method using a directional light field is provided. The 3D display device may construct a light field using a direction light generated by a high speed projector and at least one rotating optical device to thereby display a more natural 3D image in a wide region.