Holography 3D Display Prism Pattern Cross-talk Elimination
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Solution Overview
Problem
Conventional holography 3D displays are bulky, heavy, and suffer from limited viewing angles due to large pixel pitches in LCD devices, leading to 3D cross-talk issues where left eye images are presented to the right eye and vice versa, restricting observer positioning.
Innovation Solution
A hologram display apparatus featuring a display panel with a backlight unit, first and second light path deflecting cells forming prism patterns at predetermined angles, and a phase retarding plate to ensure that left eye and right eye images are accurately directed to their respective eyes without cross-talk, using liquid crystal cells in an ECB mode to control light refraction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional LCD devices with large pixel pitches are used for holography 3D display, then the display structure is simpler, but the viewing angle is limited and 3D cross-talk occurs
Solution Approach 1:
The display panel is divided into multiple sub-pixels within each pixel unit, allowing independent control of light transmission for different viewing directions. This segmentation enables wider viewing angles while maintaining the overall LCD structure
Solution Approach 2:
Multiple functional layers including polarization control layers, phase modulation layers, and liquid crystal cells are nested within the display panel structure, enabling complex optical functions to be integrated into a compact form factor
2Reliability
If conventional holography 3D display is used, then the setup is straightforward, but 3D cross-talk occurs where left eye images are presented to the right eye and vice versa
Solution Approach 1:
Different regions of the display panel are assigned different optical properties and light transmission characteristics tailored to specific viewing zones. Left eye and right eye image regions use different polarization states and phase modulations to ensure each eye receives only its designated image, eliminating 3D cross-talk
Solution Approach 2:
The display system dynamically adjusts the optical properties of liquid crystal cells in real-time based on the displayed image content, enabling precise control of light direction and polarization to maintain accurate eye-specific image delivery across different viewing positions
3Volume of moving object
If LCD devices with large pixel pitches are used, then manufacturing is easier, but the display becomes bulky and heavy
Solution Approach 1:
The pixel pitch parameter is reduced while maintaining manufacturing feasibility through optimized liquid crystal cell design and improved alignment techniques. This allows compact display volume without excessive manufacturing complexity
Solution Approach 2:
Multiple functional layers with different optical and physical properties are combined in a composite structure, enabling small pixel pitches and compact form factor while maintaining ease of manufacture through standardized layer fabrication processes
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 hologram images to be viewed from any position without 3D cross-talk, maintaining image quality and reducing the display's bulkiness by allowing for a wider viewing angle and precise eye-specific image delivery.
Implementation Method 1
a first light path deflecting cell disposed at another side of the display panel facing away from the back light unit for forming a first prism pattern along a first direction
Implementation Method 2
using liquid crystal cells in an ECB mode to control light refraction
Data Source
AI summary
The present disclosure relates to a holography three dimensional display in which no 3D cross-talk problem is arisen. The present disclosure suggests an apparatus for displaying hologram images comprising: a display panel displaying a hologram image; a back light unit disposed at one side of the display panel for supplying a back light; a first light path deflecting cell disposed at another side of the display panel facing away from the back light unit for forming a first prism pattern along a first direction rotating by a predetermined angle from a horizontal axis of the display panel; and a second light path deflecting cell disposed in front of the first light path deflecting cell for forming a second prism pattern along a second direction perpendicular to the first direction.