Vehicle Puddle Lamp Control for Stable Projection Size and Brightness
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Solution Overview
Problem
Existing vehicle puddle lamps project images of varying size and brightness due to differences in vehicle height, leading to inconsistent image quality and uniformity.
Innovation Solution
A projection device for vehicles, equipped with a distance detection device and a control device, adjusts the brightness and size of the projected image based on the measured projection distance, ensuring consistent image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the projection distance increases, then the projection image size increases, but the brightness decreases
Solution Approach 1:
The control device dynamically adjusts the brightness parameter of the projection module based on the detected projection distance. When the projection distance increases, the control device increases the brightness output of the projection module to compensate for the natural brightness reduction, thereby maintaining consistent image quality across different distances
Solution Approach 2:
The system implements a feedback mechanism where the distance detection device continuously monitors the projection distance and provides this information to the control device. The control device then adjusts the projection module's brightness in real-time based on this feedback, creating a closed-loop control system that maintains optimal image quality
2Area of stationary object
If the projection distance increases, then the projection image size increases, but the image quality consistency deteriorates
Solution Approach 1:
The control device adjusts multiple parameters including brightness and potentially size parameters of the projection image based on the detected projection distance. This dynamic parameter adjustment ensures that the projection image maintains consistent quality characteristics regardless of the distance from the projection surface
Solution Approach 2:
The distance detection device provides continuous feedback on the projection distance, enabling the control device to make real-time adjustments to projection parameters. This feedback mechanism ensures that image quality consistency is maintained across varying projection distances
3Illumination intensity
If the brightness is increased to compensate for greater projection distance, then the brightness uniformity improves, but the energy consumption increases
Solution Approach 1:
The system dynamically adjusts the brightness of the projection module based on the actual projection distance rather than maintaining a fixed high brightness level. This dynamic adjustment ensures that energy is consumed only when and to the extent necessary to achieve uniform brightness, optimizing the balance between image quality and energy efficiency
4Adaptability or versatility
If the same puddle lamp is installed on different vehicle models, then the device universality improves, but the projection image consistency deteriorates
Solution Approach 1:
The distance detection device measures the actual projection distance for each vehicle model and installation position, providing feedback to the control device. This enables the system to automatically adapt to different vehicle models while maintaining consistent projection image quality, resolving the contradiction between device universality and image consistency
Solution Approach 2:
The control device adjusts projection parameters such as brightness and size based on the detected projection distance, which varies across different vehicle models. This parameter adjustment allows the same puddle lamp to maintain consistent image quality across diverse vehicle platforms
Data Source
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AI summary
A projection device (100) adapted to be placed on a vehicle and a control method of the projection device (100) are provided. The projection device (100) includes a storage device (140) storing image data of at least one projection image, a projection module (110), a distance detection device (120) measuring a projection distance from the distance detection device to a projection plane, and a control device (130) electrically connected to the storage device (140), the projection module (110), and the distance detection device (120). The control device (130) enables the projection module (110) to project the projection image and controls brightness or size of the projection image according to the corresponding projection distance. The projection device (100) is activated by opening a door (102) of the vehicle, and power of the projection device (100) comes from the vehicle. The projection image can be adjusted according to the projection distance to maintain stable brightness and the size of the projection image.