Vehicle AR Display Luminance Control Around Bright Regions
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Solution Overview
Problem
Existing AR display systems for vehicles do not effectively adapt virtual images to the peripheral circumstances of a movable body, such as a vehicle, which can lead to suboptimal display quality and driver distraction due to environmental factors like bright lights.
Innovation Solution
A display system that includes an image capturing unit, a position determining unit, a target determining unit, a luminance determining unit, and a virtual-image creating unit, which captures images of the vehicle's surroundings, determines the driver's line of sight, and adjusts the luminance to emphasize targets, creating a virtual image that is displayed on a windshield or combiner, thereby improving visibility and reducing driver distraction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a virtual image is displayed on a display unit mounted on a movable body, then driver visibility and safety are improved, but the display quality deteriorates under adverse peripheral circumstances such as bright lights
Solution Approach 1:
The system dynamically adjusts the luminance of the virtual image based on the luminance of the captured forward scenery. When the peripheral environment is bright, the virtual image luminance is reduced to maintain visibility of the real scenery. When the peripheral environment is dark, the virtual image luminance is increased to ensure visibility of the displayed information, thus adapting to changing environmental conditions
Solution Approach 2:
The system changes the luminance parameter of the virtual image based on measured environmental conditions. The luminance determining unit measures the luminance of the forward scenery, and the virtual-image creating unit adjusts the virtual image luminance accordingly, transforming the display characteristics to match environmental conditions
2Illumination intensity
If the luminance of the virtual image is increased to improve visibility, then driver visibility is improved, but driver distraction increases due to mismatch with peripheral circumstances
Solution Approach 1:
The system uses a feedback mechanism where the luminance determining unit continuously measures the luminance of the forward scenery, and this measurement is fed back to the virtual-image creating unit to adjust the virtual image luminance. This closed-loop control ensures the virtual image luminance always matches the environmental conditions, preventing driver distraction
Data Source
AI summary
A luminance determining unit determines a luminance distribution of an exterior circumstantial image in a line-of-sight direction of a driver, and a luminance changing unit determines a bright region of this luminance distribution. Further, the luminance changing unit determines a luminance after the change in a peripheral region of this bright region. A virtual-image creating unit creates a virtual image based on the determined luminance, and a display processing unit displays this virtual image on a display unit. In this manner, since a display system displays the virtual image for use in increasing the luminance in periphery of the bright region, the feeling of the brightness for the driver can be moderated, and therefore, the visual recognition can be improved. That is, the display system can output the virtual image depending on the circumstances.