Holographic Optical Element Grid for Compact 3D Vehicle Displays
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Solution Overview
Problem
Existing hologram optical systems face challenges in maintaining the angle of incidence for hologram plates, limiting the selection between sharpness and three-dimensional effect, and are difficult to implement in vehicles due to long optical distances, with design limitations restricting image differentiation.
Innovation Solution
A three-dimensional image display apparatus featuring a housing with a light source unit, a light transfer unit comprising a holographic optical element (HOE) with a grid structure that refracts, diffracts, or reflects light, and an image display unit using polycarbonate and photopolymer materials to form indented and protruding images, allowing for improved three-dimensional effects without additional reflective means.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a mirror is used to maintain the angle of incidence through the existing hologram optical system, then the sharpness of the image is enhanced, but the optical distance becomes excessively long making it difficult to apply to vehicles
Solution Approach 1:
The patent extracts the angle-maintaining function from the traditional mirror-based optical system and integrates it directly into the hologram plate structure itself. The hologram plate is designed with specific geometric features that inherently maintain the required angle of incidence without needing external mirrors, thereby eliminating the excessively long optical distance while preserving image sharpness.
Solution Approach 2:
The patent introduces an intermediary structure within the hologram plate that serves as both the angle-maintaining element and the image-forming element. This intermediary design allows the system to achieve the necessary optical angle control without requiring separate reflective components, thus reducing the overall optical path length suitable for vehicle applications.
2Device complexity
If only one hologram image (indented or protruding) is implemented, then the optical system remains simple, but design limitations occur where only one of the three-dimensional effect or sharpness can be selected
Solution Approach 1:
The patent segments the hologram plate into multiple functional regions with different geometric configurations. Some regions are designed to form indented images while other regions form protruding images, allowing the single hologram plate to provide multiple three-dimensional effects simultaneously. This segmentation enables image differentiation without requiring complex multi-component optical systems.
Solution Approach 2:
The patent applies local quality by creating different surface geometries (indented vs. protruding) in different local areas of the hologram plate. Each local region is optimized for specific optical performance, allowing the overall system to provide both sharpness and three-dimensional effects in different zones, thereby enhancing adaptability without increasing overall system complexity.
3Reliability
If the existing hologram optical system is used, then the angle of incidence can be maintained, but it is difficult to apply to vehicles due to the excessively long optical distance
Solution Approach 1:
The patent merges the angle-maintenance function with the image-display function into a single integrated hologram plate structure. By combining these functions, the system maintains reliable angle of incidence control while eliminating the need for separate optical components that would increase the overall system size, thereby making it adaptable to vehicle applications with limited space.
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 apparatus shortens optical formation length, enables three-dimensional image display in limited spaces, and enhances the three-dimensional effect by forming both indented and protruding images, suitable for use in vehicles without additional reflective components.
Implementation Method 1
a light transfer unit which is disposed in the housing so as to face the light source unit, and refracts, diffracts, or reflects the light emitted from the light source unit
Implementation Method 2
a light transfer unit which is disposed in the housing so as to face the light source unit, and refracts, diffracts, or reflects the light emitted from the light source unit
Implementation Method 3
a light transfer unit which is disposed in the housing so as to face the light source unit, and refracts, diffracts, or reflects the light emitted from the light source unit
Implementation Method 4
a light transfer grid unit which is formed on the light transfer fixing unit, and refracts, diffracts, or reflects the light, emitted from the light source unit, toward the image display unit
Implementation Method 5
a light transfer grid unit which is formed on the light transfer fixing unit, and refracts, diffracts, or reflects the light, emitted from the light source unit, toward the image display unit
Implementation Method 6
a light transfer grid unit which is formed on the light transfer fixing unit, and refracts, diffracts, or reflects the light, emitted from the light source unit, toward the image display unit
Data Source
AI summary
The three-dimensional image display apparatus includes: a housing; a light source unit which is mounted in the housing, and emits light; a single light transfer unit which is disposed in the housing to face the light source unit, and refracts, diffracts, or reflects the light emitted from the light source unit; and an image display unit which forms, as an image, the light refracted, diffracted, or reflected by the light transfer unit.