Head-Up Display Reflector Control for Accurate Eye-Tracked Viewing
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Solution Overview
Problem
Existing communication head-up display systems face challenges in ensuring that image light accurately reaches the user's eye positions, particularly in varying user positions and postures, which can lead to suboptimal viewing of virtual images.
Innovation Solution
A communication head-up display system that includes a communication device with a sensor, controller, and communication unit to estimate user eye positions and transmit this information to a head-up display, which uses a reflector and optical element to adjust the image light's path to ensure accurate arrival at the user's eyes, allowing for optimal viewing of parallax images.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the head-up display uses a fixed reflector position, then the device complexity is reduced, but the accuracy of image light arrival at user eye positions deteriorates when user positions vary
Solution Approach 1:
The reflector is made movable rather than fixed, allowing its position to be dynamically adjusted based on detected eye positions. The drive device enables the reflector to change position in response to varying user positions, maintaining accurate image light delivery while adapting to different viewing conditions.
Solution Approach 2:
The system uses eye position detection to provide feedback about user location, which then controls the reflector positioning. This closed-loop feedback mechanism ensures the reflector is always positioned correctly to deliver image light to the user's eyes, resolving the contradiction between fixed simplicity and dynamic accuracy.
2Adaptability or versatility
If the system includes eye position estimation and communication components, then the adaptability to varying user positions is improved, but the device complexity increases
Solution Approach 1:
The communication device performs multiple functions: it detects eye positions, estimates user location, transmits this information to the head-up display, and controls the reflector positioning. By making the communication device multi-functional, the system achieves high adaptability without proportionally increasing overall system complexity.
Solution Approach 2:
The patent combines the communication device with the head-up display system, integrating eye position detection, information transmission, and reflector control functions into a unified system. This merging reduces the number of separate components needed, achieving adaptability while managing complexity through integration.
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 system effectively ensures that users can view virtual images appropriately by accurately directing image light based on estimated eye positions, enhancing the usability and effectiveness of the communication head-up display, especially in mobile applications like vehicles.
Implementation Method 1
The optical element is configured to define a propagation direction of image light emitted from the parallax image
Implementation Method 2
The optical element is configured to define a propagation direction of image light emitted from the parallax image
Implementation Method 3
The reflection element is configured to reflect the image light
Data Source
AI summary
A communication head-up display system includes a communication device and a head-up display. The communication device includes a first controller which determines eye-positions of eyes of a user in at least one direction. The head-up display includes a display panel, an optical element, a reflector. The display panel displays a parallax image. The optical element defines a propagation direction of image light emitted from the parallax image. The reflector reflects the image light whose propagation direction is defined by the optical element. The reflector includes a reflection element and a drive device. The reflection element reflects the image light. The drive device changes at least one of position and posture of the reflection element so that the image light reflected by the reflection element arrives at the eye-positions.