Holographic Display Flip Controller and Viewcone Expander
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Solution Overview
Problem
Holographic displays face issues with image blurring and duplication due to index of refraction mismatches between optical elements, and experience unwanted 'flip' effects where views rapidly switch, leading to suboptimal viewing experiences, especially at the edges of viewcones.
Innovation Solution
Incorporating a flip controller to manage light pathways and a viewcone expander to broaden the viewing angle, along with a lenticular array and optical elements, to prevent unwanted light leakage and enhance the display's ability to project views without peripherals like glasses or headsets.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If optical elements with different indices of refraction are used in the holographic display, then the display can guide light through multiple pathways, but image blurring and duplication occur due to index mismatch
Solution Approach 1:
The patent introduces an index-matched optical coupling material between optical elements with different indices of refraction. This intermediary material has an index of refraction that is matched to both adjacent elements, serving as a bridge that allows light to pass through multiple pathways without causing blurring or duplication due to index mismatch at the interfaces.
2Ease of operation
If a lenticular array is used to guide light, then views can be directed to specific locations, but unwanted light leakage occurs causing flip effects
Solution Approach 1:
The patent extracts and removes unwanted light pathways by introducing light blocking elements at specific locations where light leakage occurs. The flip controller contains light blocking elements that are positioned to block stray light from reaching locations where it should not go, thereby eliminating the flip effect while preserving the intended view direction control.
3Adaptability or versatility
If the viewcone is expanded to accommodate multiple viewers, then broader viewing angles are achieved, but light leakage and flip effects increase at the edges
Solution Approach 1:
The patent applies local quality by making the light blocking elements可调 (adjustable) in their blocking characteristics. The flip controller can dynamically adjust which light pathways are blocked based on the viewing angle, allowing the display to accommodate multiple viewers with broader viewing angles while preventing light leakage and flip effects at the edges by selectively blocking only the unwanted pathways.
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 or eliminates image blurring, duplication, and flip effects, enabling broader viewcones and allowing multiple viewers to see a free-space 3D image simultaneously without the need for additional viewing aids, enhancing depth perception and image quality.
Implementation Method 1
a lenticular array, the light from the screen passes through the lenticular array
Implementation Method 2
optical element(s) between the screen and the optical volume, the light from the screen passes through the optical element(s)
Data Source
AI summary
A holographic display can include a light source configured to output light; a parallax generator optically coupled to the light source; an optical volume, where the light is perceivable as a three dimensional image within the optical volume; optionally, a flip controller; and, optionally, a viewcone expander.