Head-Up Display Device Multi-Plane Projection via Phase Spatial Light Modulator
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Solution Overview
Problem
Existing head-up display devices using phase spatial light modulators can only provide a single projection plane for vehicle state and road condition information, leading to adverse effects on display quality when both types of information are displayed simultaneously.
Innovation Solution
A head-up display device that includes a light source, a phase spatial light modulator capable of generating and modulating multiple phase-modulated light beams, diffusers to separate and diffuse these beams, and a reflector assembly to guide them to different spatial positions, allowing for the display of vehicle state and road condition information at distinct locations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single projection plane is used to display both vehicle state information and road condition information, then the device structure is simple, but the display effect is adversely affected
Solution Approach 1:
The patent divides the single projection plane into multiple projection planes by using a phase spatial light modulator to generate multiple phase-modulated light beams. Each projection plane is dedicated to displaying specific types of information (vehicle state information, road condition information), thereby improving display effect while maintaining reasonable device structure through optical path division rather than physical separation.
Solution Approach 2:
The patent transitions from a two-dimensional single projection plane to a three-dimensional multi-projection plane structure by utilizing spatial light modulation. Multiple light beams are directed to different spatial positions to form multiple projection planes, adding a spatial dimension to the display architecture and enabling simultaneous display of different information types without compromising display quality.
2Device complexity
If multiple types of information are displayed in a mixed manner on the same projection plane, then the device structure is simple, but the display quality deteriorates
Solution Approach 1:
The patent segments the optical path into multiple independent channels using a phase spatial light modulator. Each channel processes specific information (vehicle state or road condition) separately, preventing mixing and interference. This segmentation maintains device simplicity while ensuring high display quality through dedicated optical paths for different information types.
Solution Approach 2:
The phase spatial light modulator acts as an intermediary device that receives a single light beam and transforms it into multiple phase-modulated light beams. This intermediary component enables the system to handle multiple information types simultaneously by spatially separating them in the optical domain, thereby maintaining display quality without requiring completely separate optical systems.
3Device complexity
If a single projection plane is used for all information, then the device structure is simple, but information clarity is compromised
Solution Approach 1:
The patent adds a spatial dimension to the projection system by creating multiple projection planes at different spatial positions. Each projection plane presents clear, undiluted information without being mixed with other information types. This dimensional transition from single-plane to multi-plane projection preserves information clarity while maintaining a unified projection system architecture.
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
Enables the simultaneous and clear display of multiple types of information at different spatial positions, improving display effectiveness and meeting various display requirements without compromising image quality.
Implementation Method 1
a phase spatial light modulator configured to modulate a phase of the to-be-modulated light beam and emit at least two phase-modulated light beams
Implementation Method 2
at least two diffusers configured to receive and diffuse the at least two reproduced images generated by the reproduction component respectively
Implementation Method 3
a reflector assembly configured to guide the at least two light beams diffused by the at least two diffusers to a projection region, so as to form at least two projection images at different spatial positions
Data Source
AI summary
A head-up display device, a head-up display method and a vehicle are provided. The head-up display device includes: a light source configured to generate a to-be-modulated light beam; a phase spatial light modulator configured to modulate a phase of the to-be-modulated light beam and emit at least two phase-modulated light beams; a reproduction component configured to perform image reproduction on the at least two phase-modulated light beams, so as to generate at least two reproduced images; at least two diffusers configured to receive and diffuse the at least two reproduced images generated by the reproduction component respectively; and a reflector assembly configured to guide the at least two light beams diffused by the at least two diffusers to a projection region, so as to form at least two projection images at different spatial positions.