Hologram Sheet Prism Layout for Compact Floating Image Displays
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Solution Overview
Problem
Conventional hologram display apparatuses are structurally limited by an increased volume due to the need for a display and hologram sheet to maintain a 45-degree angle for forming holographic images in free space.
Innovation Solution
A hologram sheet and display apparatus design that includes a prism array to refract light, a reflective sheet to generate a floating image, and optionally a lens array to adjust the image position, allowing the display and hologram sheet to be disposed parallel, thereby reducing volume.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the display apparatus and hologram sheet are disposed at a 45-degree angle to form holographic images, then the holographic image formation is achieved, but the volume of the display apparatus increases
Solution Approach 1:
The patent transitions from a conventional 45-degree angular arrangement to a parallel planar arrangement by introducing a prism array that redirects light paths. The prism array refracts light from the display to strike the hologram sheet at the required angle while keeping both components parallel to each other, effectively utilizing the third dimension (light redirection) to resolve the spatial conflict.
Solution Approach 2:
The patent introduces a prism array as an intermediary optical element between the display and hologram sheet. This mediator component refracts the light to achieve the necessary incident angle on the hologram sheet without requiring the display and hologram sheet to be positioned at 45 degrees relative to each other, thereby enabling miniaturization while maintaining holographic image formation capability.
2Volume of stationary object
If the display and hologram sheet are disposed parallel to each other, then the volume is reduced, but the light incident angle on the hologram sheet becomes insufficient for proper holographic image formation
Solution Approach 1:
The prism array serves as an optical intermediary that receives light from the parallel-disposed display and redirects it to strike the hologram sheet at the required incident angle. This mediator enables both components to remain parallel for miniaturization while ensuring proper light interaction for holographic image formation.
Solution Approach 2:
The patent changes the optical parameters of the system by introducing refraction through the prism array. The prism array modifies the light's propagation direction and incident angle on the hologram sheet, allowing the system to achieve proper holographic image formation despite the parallel arrangement of display and hologram sheet.
3Reliability
If a prism array is introduced to redirect light, then the incident angle on the hologram sheet is improved, but the device complexity increases
Solution Approach 1:
The patent divides the optical system into distinct functional segments: the display, the prism array, and the hologram sheet. The prism array is further segmented into multiple microprisms arranged in an array, where each microprism handles a specific portion of the light field. This segmentation allows for modular design and simplifies the overall system architecture despite the added functionality.
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 design achieves a significant reduction in overall volume of the hologram display apparatus while maintaining the capability to generate and detect floating images, enhancing applications in AR/VR, Metaverse, and medical care.
Implementation Method 1
a prism array configured to refract light incident from the display
Implementation Method 2
a reflective sheet disposed to face the prism array and configured to reflect the light refracted by the prism array and generate a floating image
Implementation Method 3
a lens array disposed to face the reflective sheet and configured to adjust a position of the floating image generated by the reflective sheet
Data Source
AI summary
The present disclosure relates to a holographic sheet and a hologram display apparatus including the same. The hologram sheet may include a prism array configured to refract light incident from the outside, and a reflective sheet disposed to face the prism array and configured to reflect the light refracted by the prism array and generate a floating image.