Sub-hologram Area Determination for Holographic Display Calculation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current digital hologram generation methods face challenges in reducing complexity and calculation requirements, especially when expressing three-dimensional objects with a large number of points, and in extending the viewing angle due to limitations in spatial light modulator pixel size and diffraction angle.
Innovation Solution
A hologram generation apparatus that calculates and determines a sub-hologram area based on user viewing windows and display pixel sizes, minimizing calculations by selecting the appropriate method based on the hologram object's position relative to the display, and generating a hologram pattern within this sub-hologram area to reduce computational complexity and improve clarity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the number of 3D points to be expressed is increased, then the resolution and detail of the hologram is improved, but the complexity and number of calculations required increases excessively
Solution Approach 1:
The patent divides the hologram generation process into two stages: first generating a low-resolution hologram from all 3D points, then generating a high-resolution hologram only for selected regions of interest. This segmentation allows high detail in important areas without requiring excessive calculations for the entire hologram, thus resolving the contradiction between hologram resolution and calculation complexity.
Solution Approach 2:
The patent applies different quality levels to different regions of the hologram. Regions of interest receive high-resolution treatment while other areas maintain lower resolution. This local quality approach ensures that computational resources are concentrated where they provide the most value, improving perceived hologram quality without proportionally increasing overall calculation complexity.
2Adaptability or versatility
If the pixel size of the spatial light modulator is reduced, then the diffraction angle increases and viewing angle is extended, but physical limitations prevent further reduction
Solution Approach 1:
The patent transitions from a single-plane hologram to a multi-plane holographic display system. By stacking multiple SLMs at different depths, the system achieves extended viewing angles without requiring smaller pixels on individual SLMs. This dimensional approach (adding the depth dimension with multiple planes) circumvents the physical manufacturing limitations of pixel size reduction.
3Area of stationary object
If a full hologram is generated for the entire spatial light modulator area, then complete coverage is achieved, but the number of calculations increases excessively
Solution Approach 1:
The patent extracts and processes only the relevant portions of the hologram data. Instead of calculating hologram data for the entire SLM area, the system identifies regions of interest and generates high-resolution holograms only for those specific areas. This extraction approach maintains complete coverage where needed while dramatically improving calculation efficiency by avoiding unnecessary computations in less important regions.
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
This approach reduces the number of calculations required for generating holograms, enabling real-time hologram display with improved clarity and wider viewing angles by determining the optimal sub-hologram area, thus overcoming the limitations of conventional methods.
Implementation Method 1
light may be diffracted from a spatial light modulator (SLM) so as to bring about an offset or constructive interference
Implementation Method 2
generate a hologram pattern by accumulating the generated point-hologram
Data Source
AI summary
A sub-hologram generation method and an apparatus for a hologram display are provided, the apparatus including at least a first calculation unit configured to calculate a size of a first sub-hologram area corresponding to a first hologram object using a user viewing window, a second calculation unit configured to calculate a size of a second sub-hologram area corresponding to the first hologram object based on a size of a display pixel, and a determiner configured to compare the size of the first sub-hologram area and the size of the second sub-hologram area, and to determine a sub-hologram area corresponding to the first hologram object based on a result of the comparing.