HUD Driver Monitoring Camera Layout for Higher Luminance
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Solution Overview
Problem
Existing imaging and display systems in vehicles suffer from reduced luminance and a limited imaging area due to light attenuation from repeated reflections and the small size of the imaging area, making it difficult to appropriately monitor the driver.
Innovation Solution
The system includes a display, an optical system with at least one mirror, a housing, a light-transmissive cover, and a camera supported by a body connected outside the housing. The camera captures images of the user through the light-transmissive cover without using the optical system, resulting in higher luminance and a wider imaging area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the camera is disposed inside the housing and uses the optical system to capture images, then the system structure is compact, but the luminance is reduced and the imaging area is limited due to light attenuation from repeated reflections
Solution Approach 1:
The camera is extracted from inside the housing and disposed outside, covering the light-transmissive cover. This allows the camera to capture images directly through the cover without using the optical system, eliminating light attenuation from repeated reflections and thereby improving luminance and imaging area.
2Area of stationary object
If the camera is disposed inside the housing, then the system structure is compact, but the imaging area is limited
Solution Approach 1:
The camera is extracted from inside the housing and disposed outside to cover the light-transmissive cover. This positioning allows the camera to capture a wider area through the cover directly, expanding the imaging area without the constraints of the internal housing structure.
3Illumination intensity
If the camera is disposed outside the housing to cover the light-transmissive cover, then the luminance and imaging area are improved, but the heat impact on the camera increases
Solution Approach 1:
The light-transmissive cover serves as an intermediary element. The camera disposed outside captures images through this cover, which mediates between the optical system inside the housing and the camera outside. This allows the camera to benefit from direct light capture (improved luminance) while the housing structure can provide thermal management for the internal components.
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 configuration enhances the luminance and expands the imaging area, allowing for a more effective monitoring of the driver while reducing the impact of heat on the camera and increasing design flexibility.
Implementation Method 1
a light-transmissive cover having transparency to light and disposed to cover at least part of the opening of the housing
Implementation Method 2
the first light emitted from the display passes through the light-transmissive cover via the optical system, and is reflected by a display medium toward a direction of a user
Data Source
AI summary
Imaging and display system includes: a display; an optical system including a first mirror and a second mirror; a housing; a light-transmissive cover transparent to light and disposed to cover at least part of an opening of the housing; and a driver monitoring camera supported by a supporting body connected outside of the housing. First light emitted from the display passes through the light-transmissive cover via the optical system, and is reflected by a windshield toward a direction of the user. The driver monitoring camera captures an image of a driver shown on the light-transmissive cover by second light from a direction of the driver reflected by the windshield toward a direction of the light-transmissive cover.