Head-up Display Scanner Angle Adjustment for Mirror Distortion
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Solution Overview
Problem
Head-up displays face distortion issues when the angle of a concave mirror is changed, leading to potential image distortion for the user.
Innovation Solution
A head-up display system that includes a beam generator, a scanner with a movable reflective surface, an optical actuator to adjust the scanner angle, a concave mirror, and a controller that offsets distortions by adjusting the scanner angle based on the concave mirror's angle of incidence, ensuring that distortions generated at both components cancel each other out.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the angle of the concave mirror is changed to adjust display position, then the display position can be changed, but image distortion occurs
Solution Approach 1:
The system applies preliminary anti-action by introducing a distortion correction image that pre-compensates for the distortion that will occur when the concave mirror angle is changed. The controller calculates the expected distortion based on the mirror angle and generates a corrected image that, when reflected by the distorted concave mirror, produces a straight final image.
Solution Approach 2:
The system changes parameters by adjusting the scanner angle of incidence in response to changes in the concave mirror angle of incidence. When the mirror angle changes to move the display position, the scanner angle is simultaneously adjusted to compensate for the resulting distortion, maintaining image quality across different display positions.
2Ease of operation
If the scanner angle of incidence is adjusted to change display position, then display position changes, but distortion correction becomes complex
Solution Approach 1:
The system merges the distortion correction function into the existing scanner by utilizing its angle of incidence adjustment capability. Instead of adding a separate distortion correction device, the scanner is controlled to perform both its primary scanning function and the secondary distortion compensation function, simplifying the overall system architecture.
3Area of stationary object
If the concave mirror angle is changed to expand the display area, then more display area is available, but image quality deteriorates due to distortion
Solution Approach 1:
The system applies dynamics by making the scanner angle of incidence adjustable and responsive to changes in the concave mirror angle. As the mirror angle changes to expand or shift the display area, the scanner angle dynamically adjusts to maintain optimal imaging conditions, ensuring high image quality across the entire expanded display area.
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 effectively minimizes image distortions even when the concave mirror's angle is changed, providing a clear and undistorted image to the user by aligning the optical axes and adjusting the scanner angle to counteract distortions, thus maintaining image quality.
Implementation Method 1
a scanner including a moveable reflective surface, the scanner receiving the display light from the beam generator and scanning the display light
Implementation Method 2
a screen that receives the display light from the scanner and reflects the display light
Implementation Method 3
a concave mirror that receives the display light from the screen and reflects and expands the display light to the projection member
Data Source
AI summary
A head-up display includes a concave mirror actuator that changes, based on external instructions, a reflection angle by which a concave mirror reflects display light. A drawing unit includes a beam generator, a scanner, an optical actuator, and a controller, The beam generator emits a beam, and the scanner scans the beam in two dimensions by moving a reflection surface to draw an image. The optical actuator changes an angle of incidence of when the beam is emitted to the scanner. The controller drives the optical actuator to change the angle of incidence such that display light distortions generated at the concave mirror are offset by display light distortions generated at the scanner.