Spatial Light Modulator HUD for Multi-Depth Virtual Images
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional heads-up display systems with multiple virtual image planes require multiple image generation modules, leading to increased costs and reduced miniaturization potential.
Innovation Solution
A display apparatus utilizing a spatial light modulator in an image generation module to perform phase modulation on image light, generating multiple images with different spatial positions on diffusing screens, thereby eliminating the need for multiple image generation modules.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple image generation modules are used to generate multiple virtual images with different distances, then multiple display requirements are met, but system cost increases and device size increases
Solution Approach 1:
The patent combines multiple image generation functions into a single image generation module by using a spatial light modulator with multiple independently controllable pixel units. Each pixel unit can be independently controlled to generate light beams with different spatial parameters, enabling one module to perform the function of multiple modules while reducing system complexity and size
Solution Approach 2:
The spatial light modulator is designed as a universal component that can generate multiple virtual images with different distances and positions simultaneously. By independently controlling different pixel units within the same module, the system achieves multi-functionality without requiring separate dedicated modules for each virtual image, thereby reducing overall device complexity
2Adaptability or versatility
If multiple image generation modules are used to generate multiple virtual images with different distances, then multiple display requirements are met, but system cost increases
Solution Approach 1:
The patent merges multiple image generation modules into one by implementing multiple virtual image generation capabilities within a single spatial light modulator. This consolidation reduces the quantity of components needed, lowering material costs, assembly costs, and overall system expenditure while maintaining the ability to display multiple types of information
Solution Approach 2:
The single image generation module is designed with universal functionality to handle multiple display requirements simultaneously. By making one module perform the work of several, the patent reduces the total quantity of components required, directly reducing system cost while preserving adaptability
3Adaptability or versatility
If multiple image generation modules are used to generate multiple virtual images with different distances, then multiple display requirements are met, but miniaturization is hindered
Solution Approach 1:
The patent merges multiple image generation modules into a single integrated spatial light modulator, dramatically reducing the volume occupied by the display system. By combining multiple functions into one component rather than using separate modules, the patent enables miniaturization while maintaining the capability to generate multiple virtual images with different distances
Solution Approach 2:
The patent implements a nested structure where multiple virtual image generation functions are embedded within a single image generation module. The spatial light modulator contains multiple independently controllable pixel units that are nested within the same physical component, allowing multiple display capabilities to coexist in a compact form factor
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 solution reduces system size and cost while enabling the display of multiple types of information on different virtual image planes, improving safety and usability in vehicle applications.
Implementation Method 1
a spatial light modulator configured to perform phase modulation on to-be-modulated image light, to generate modulated first image light and modulated second image light
Implementation Method 2
The first image light is projected onto the first diffusing screen, and the second image light is projected onto the second diffusing screen
Data Source
AI summary
A display apparatus includes an image generator including a spatial light modulator that is configured to perform phase modulation on to-be-modulated image light to generate modulated first image light and modulated second image light, and an image display module that is disposed on a light emitting side of the image generator. The image display module includes a first diffusing screen and a second diffusing screen. The first image light is projected on the first diffusing screen and the second image light is projected on the second diffusing screen. A spatial position of the first diffusing screen is different from a spatial position of the second diffusing screen.