Vehicle Projection Unit With Ambient-Brightness Size Control
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Solution Overview
Problem
Existing projection units in motor vehicles with limited luminous flux struggle to maintain consistent projection quality across varying ambient conditions, resulting in uneven brightness and visibility of projected information.
Innovation Solution
A motor vehicle projection unit connected to a monitoring circuit that includes a brightness sensor and computing unit to adjust the size of the projection based on ambient brightness, allowing the projection to adapt and maintain high-quality visibility regardless of lighting conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If projection units with limited luminous flux are used to generate light carpets on the road surface, then the device complexity is reduced and installation is simplified, but the projection quality and visibility depend heavily on ambient conditions and cannot be maintained uniformly across different lighting environments
Solution Approach 1:
The projection unit dynamically adjusts the size of the projection on the road surface based on ambient brightness conditions. The control unit receives brightness information from the brightness sensor and modifies the projection dimensions in real-time to maintain uniform visibility. In bright conditions, the projection is enlarged to compensate for reduced contrast, while in dark conditions, it is reduced to appropriate sizes.
Solution Approach 2:
A brightness sensor continuously monitors the ambient light conditions and provides feedback to the control unit. This feedback loop enables the system to automatically adapt the projection size according to actual lighting environments, ensuring consistent projection quality without manual intervention. The control unit processes the brightness information and adjusts the projection unit parameters accordingly.
2Illumination intensity
If the projection size is increased to improve visibility in bright ambient conditions, then the projection becomes more visible, but the luminous flux is distributed over a larger area reducing the brightness intensity
Solution Approach 1:
The system changes the projection parameters (size, area, dimensions) based on ambient brightness conditions. In bright conditions, the projection area is increased to maintain visibility despite reduced contrast. The control unit calculates optimal projection dimensions that balance visibility requirements with luminous flux availability, ensuring efficient use of the limited light output from the projection unit.
3Adaptability or versatility
If a brightness sensor and control unit are added to dynamically adjust projection size, then projection quality consistency across ambient conditions is improved, but the device complexity and cost increase
Solution Approach 1:
The brightness sensor and control unit are integrated into the existing motor vehicle monitoring systems. The control unit leverages existing processors and communication buses already present in modern vehicles, making the additional functionality minimally invasive. The system uses universal communication protocols and interfaces that are standard in automotive applications, reducing the need for dedicated specialized 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
Ensures high-quality projection visibility by varying the projection size to compensate for ambient brightness changes, ensuring clear recognition of projected information in diverse lighting scenarios.
Implementation Method 1
The monitoring circuit comprises a brightness sensor for determining a value of the brightness in the environment of the motor vehicle
Implementation Method 2
The projection unit comprises a light source that is able to output a merely limited luminous flux by design
Data Source
AI summary
A motor vehicle has a projection unit for projecting graphical or character-based information on a projection surface. The projection unit is connected to a monitoring circuit of the motor vehicle that is configured to project the graphical or character-based information. The monitoring circuit includes a brightness sensor for determining a value for the ambient brightness around the motor vehicle and a computer unit for controlling, on the basis of the value for the ambient brightness received from the brightness sensor, the size of the projection on the projection surface due to the projection unit.