Imaging System Gravity-Direction Light Projection
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Solution Overview
Problem
Head-up displays are affected by environmental light sources and direct eye alignment, which degrades the visual effect for users.
Innovation Solution
An imaging system with an image generating device projecting light towards the gravity direction and utilizing two reflecting mirrors to form a virtual image, along with a light shielding base to prevent environmental light interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the display device projects light toward the anti-gravity direction, then the virtual image can be formed, but the visual effect is degraded due to environmental light interference and direct eye alignment
Solution Approach 1:
The patent inverts the conventional HUD light projection direction from anti-gravity (upward) to gravity direction (downward). The display device projects light downward toward a reflecting mirror positioned below it, which then reflects the light to form the virtual image. This inversion fundamentally changes the optical path geometry, allowing the display device to be positioned above the reflecting mirror while projecting light downward, thereby avoiding direct exposure to environmental light sources from above and preventing direct eye alignment with the display device.
Solution Approach 2:
The patent introduces a vertical dimension change in the optical path arrangement. By positioning the reflecting mirror below the display device and projecting light downward, the system creates a three-dimensional spatial separation between the display device, reflecting mirror, and observer's eye. This dimensional reconfiguration allows the optical components to be arranged in a vertically stacked configuration rather than a horizontal or upward-projection layout, effectively shielding the optical path from environmental light interference.
2Ease of operation
If the display device projects light toward the anti-gravity direction, then the head up display can be implemented, but the eye may watch the display device directly causing visual effect degradation
Solution Approach 1:
The patent inverts the conventional HUD configuration by projecting light downward instead of upward. The display device is positioned above the reflecting mirror, projecting light downward to the mirror, which then reflects the light to form the virtual image in the observer's field of view. This inversion ensures that the observer's eye looks at the virtual image formed by the reflected light rather than directly at the display device, eliminating the harmful direct alignment effect.
Solution Approach 2:
The reflecting mirror acts as an intermediary element between the display device and the observer's eye. Instead of the eye directly viewing the display device, the light from the display device is first reflected by the mirror before reaching the eye. This intermediary arrangement allows the display device to be positioned in a location that would otherwise cause direct eye alignment, while the mirror redirects the light path to form the virtual image without exposing the eye to the display device directly.
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
Enhances visual effect by shielding environmental light and preventing direct eye alignment with the image generating device, resulting in improved image clarity and reduced stray light influence.
Implementation Method 1
a head up display (HUD) is used to project specific information onto a glass by optical reflection principle
Data Source
AI summary
An imaging system includes an image generating device and two reflecting mirrors. The image generating device projects a light toward a gravity direction. The two reflecting mirrors are disposed with respect to each other and one of the two reflecting mirrors is disposed with respect to the image generating device. The light projected by the image generating device forms a virtual image through the two reflecting mirrors in sequence.