Light Field Display Device with Dynamic Optical Coupler
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Solution Overview
Problem
Current three-dimensional display technologies, particularly those using non-glasses type methods like light field reproduction, face challenges in providing an immersive and fatigue-free viewing experience due to limitations in depth perception and field of view, often resulting in inversion phenomena and reduced eye comfort.
Innovation Solution
A light field display device incorporating an optical coupler with a beam splitter, concave mirror, and eye tracking sensor, which adjusts the position and distance of virtual cameras based on depth information and user eye positions to generate multi-view images, combined with a micro lens array and polarizing plates, to enhance depth perception and reduce eye fatigue.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If light field reproduction is used for three-dimensional display, then depth perception is improved, but inversion phenomena occur and eye comfort deteriorates
Solution Approach 1:
The patent implements dynamic adjustment of the optical system based on real-time eye position detection. The controller modifies the optical path and image presentation according to the detected gaze direction, allowing the display to adapt to changing viewing conditions and prevent inversion phenomena that occur with static light field reproduction.
Solution Approach 2:
The system incorporates an eye tracking sensor that continuously monitors user eye positions and feeds this information back to the controller. This feedback mechanism enables real-time correction of display parameters to maintain proper image orientation and reduce eye fatigue caused by inversion effects.
2Ease of operation
If non-glasses type three-dimensional display is used, then viewing convenience is improved, but field of view is limited and immersion is reduced
Solution Approach 1:
The patent transitions from conventional two-dimensional display to light field reproduction that adds depth dimension, creating true three-dimensional images. This dimensional expansion increases the effective viewing area and field of view while maintaining glasses-free convenience.
Solution Approach 2:
The system dynamically adjusts the displayed content and optical parameters based on detected eye positions and gaze directions. This dynamic adaptation expands the effective field of view by presenting appropriate multi-view images as eyes move, enhancing immersion while maintaining viewing convenience.
3Device complexity
If static multi-view images are displayed, then device complexity is reduced, but adaptability to user eye positions deteriorates
Solution Approach 1:
The system uses the user's own eye position information to automatically adjust the display configuration. The eye tracking sensor and controller work together to enable the display to self-adapt to viewing conditions without requiring external intervention or complex manual configuration.
Solution Approach 2:
The controller dynamically changes display parameters including image selection, optical path configuration, and presentation timing based on detected eye positions. These parameter adjustments enable adaptability to different viewing conditions while building upon the existing multi-view image generation capability.
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 provides an improved immersive experience with reduced eye fatigue by dynamically adjusting the display to match user eye positions and depth perceptions, minimizing inversion phenomena and enhancing the field of view while maintaining high image resolution.
Implementation Method 1
an optical waveguide including the first surface, the second surface, the emission surface, and a third surface facing the first surface
Implementation Method 2
a beam splitter disposed in the optical waveguide
Implementation Method 3
a concave mirror disposed adjacent to the third surface of the optical waveguide, and wherein the controller moves the concave mirror up and down with respect to the third surface
Implementation Method 4
a plurality of polarizing plates including: a first polarizing plate disposed on the first surface; and a second polarizing plate disposed on the emission surface and having a polarization axis substantially perpendicular to a polarization axis of the first polarizing plate
Implementation Method 5
a micro lens array disposed on the display panel and including a plurality of micro lenses
Data Source
AI summary
A light field display device includes: a display module; an optical coupler emitting a third image obtained by combining a first image and a second image, and including a first surface, a second surface and an emission surface emitting the third image, wherein the first image is emitted from the display module and is incident on the first surface, wherein the second image is incident on the second surface; and a controller configured to generate image data based on 3D modeling data and provide the image data to the display module. The optical coupler includes: an optical waveguide including the first, second and emission surfaces, and a third surface; a beam splitter in the optical waveguide; and a concave mirror adjacent to the third surface of the optical waveguide, and wherein the controller moves the concave mirror in correspondence with depth information included in the 3D modeling data.