Holographic 3D Display Using Stacked LCD Panels
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Solution Overview
Problem
Conventional 3D image display methods, such as holography and stereoscopy, face challenges in data capacity, eye fatigue, and increased manufacturing costs, particularly in achieving high resolution and seamlessly integrating 2D and 3D images.
Innovation Solution
A 3D image display device utilizing a lighting unit with multiple light source units, a hologram optical unit with multiple hologram elements, and a display panel that modulates light to form subframe images, allowing for the creation of 3D images with different depths by spatially separating screen images and using time multiplexing to reduce eye fatigue.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single LCD panel is used to display both left-eye and right-eye images, then the device structure is simplified and made flat, but the image resolution is reduced to 50% or less and eye fatigue occurs
Solution Approach 1:
The patent divides the display into multiple independent LCD panels, with each panel dedicated to displaying images for a specific eye. This segmentation allows each panel to maintain full resolution without having to share pixels with the other eye, thereby resolving the contradiction between simplified structure and reduced resolution.
Solution Approach 2:
The patent introduces a vertical stacking dimension by placing multiple LCD panels at different heights (first display panel at first height, second display panel at second height). This spatial arrangement in the vertical dimension allows each eye to receive images from its dedicated panel without resolution loss, while the overall device maintains a flat profile through careful spatial organization.
2Measurement precision
If multiple display panels are used to present actual depth, then 3D image quality is improved, but the size of the display system and manufacturing cost increase
Solution Approach 1:
Instead of expanding the display system horizontally with multiple side-by-side panels, the patent utilizes the vertical dimension to stack panels at different heights. This approach achieves 3D depth presentation while keeping the overall system footprint compact, as the panels are arranged in a vertical column rather than spreading out horizontally.
Solution Approach 2:
Each LCD panel in the stack serves multiple functions: it displays images for a specific eye, contributes to 3D depth perception, and can independently control its illumination. This multi-functionality reduces the need for additional separate components, thereby controlling system size and manufacturing cost while maintaining 3D image quality.
3Device complexity
If left-eye and right-eye images are displayed on a single panel, then the device structure is simplified, but it is not easy to embody 2D images together with 3D images
Solution Approach 1:
By segmenting the display into separate panels for left-eye and right-eye images, the patent enables independent control of each panel's content. This allows 2D images to be displayed on panels when needed, while maintaining the capability for 3D stereoscopic display, thereby achieving versatility without complicating the overall device structure.
Solution Approach 2:
The patent implements dynamic switching between different display modes (2D and 3D) by controlling which panels are active and how they are configured. The system can dynamically adapt to display 2D images on individual panels or combine panels for 3D stereoscopic display, providing flexibility without requiring a fundamentally complex device structure.
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 reduces eye fatigue and increases the realism of 3D images while maintaining a compact and cost-effective design, enabling the simultaneous display of 2D and 3D images with improved resolution.
Implementation Method 1
The holography method involves recording interference signals obtained by overlapping light from the subject of an image and reference light with coherency and reproducing the recorded interference signals
Implementation Method 2
a display panel, which modulates light reproduced by the hologram optical unit according to image signals
Data Source
AI summary
The image display device including a lighting unit having a plurality of light source units, a hologram optical unit, which reproduces light to form a plurality of screen images spatially apart from each other when light is incident from the lighting unit, and a display panel, which modulates light reproduced by the hologram optical unit according to image signals.