Camera Monitor Display Brightness Balancing Across Uneven Ambient Light
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Solution Overview
Problem
Existing camera monitor systems in commercial vehicles often fail to maintain optimal display brightness across multiple displays when ambient light conditions vary, leading to one display becoming too dark and reducing driver visibility, especially during low light conditions or when light comes from one side.
Innovation Solution
A camera monitor system with multiple cameras and displays that utilize ambient light sensors to adjust brightness, where a controller compares ambient light signals from each display and increases the brightness of the darker display by half the difference between the two, ensuring balanced visibility across all displays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If each display adjusts brightness independently based on its own ambient light sensor, then each display can adapt to local lighting conditions, but displays may have uneven brightness levels reducing overall visibility
Solution Approach 1:
The patent merges the brightness control of multiple displays by having each display's controller adjust not only its own display's backlight level based on its ambient light sensor reading, but also the backlight levels of other displays in the system. This combining approach ensures uniform brightness across all displays while maintaining adaptability to ambient lighting conditions.
Solution Approach 2:
The system implements feedback by having each display's controller receive ambient light sensor readings, compare them with other displays, and continuously adjust backlight levels to maintain uniform brightness. The controller monitors brightness levels and makes real-time adjustments to compensate for variations in ambient lighting across different display locations.
2Ease of operation
If ambient light sensors are placed near each display to detect local light conditions, then each display can respond to its specific lighting environment, but displays in shadow or bright light may have poor visibility
Solution Approach 1:
The patent combines brightness control across multiple displays by having each controller adjust all displays' backlight levels based on their respective ambient light sensor readings. This ensures that even if one sensor is in shadow or bright light, all displays maintain adequate and uniform brightness for reliable visibility.
3Adaptability or versatility
If individual displays adjust backlight levels independently, then each display can optimize for its local conditions, but the overall system performance is reduced due to brightness mismatches
Solution Approach 1:
The patent merges the independent brightness control of individual displays into a coordinated system where each controller adjusts all displays' backlight levels. This maintains the adaptability to local lighting conditions while improving overall system performance by eliminating brightness mismatches between displays.
Solution Approach 2:
The system achieves homogeneity in display brightness across the entire system by having controllers adjust backlight levels to ensure all displays maintain uniform and adequate brightness, regardless of local ambient lighting variations. This homogeneous approach improves overall system performance while preserving local adaptability.
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 solution ensures that all displays remain adequately bright, improving driver visibility by maintaining homogeneous brightness levels even in varying ambient light conditions, such as during sunrise or sunset, thereby enhancing safety.
Implementation Method 1
Multiple ambient light sensors include first and second ambient light sensors that are in proximity respectively to the first and second displays and are configured to respectively provide a first and second light ambient signal indicative of an amount of ambient light respectively in a region of the first and second displays
Data Source
AI summary
A CMS includes first and second cameras that respectively provide first and second fields of view. First and second displays depict at least portions of the first and second fields of view. The first and second displays respectively include a first and second brightness. First and second ambient light sensors are in proximity respectively to the first and second displays and provide a first and second light ambient signal indicative of an amount of ambient light respectively in a region of the first and second displays. A controller is in communication with the first and second displays and is in communication with the first and second ambient light sensors. The controller adjusts one of the first and second brightnesses of one of the first and second displays based upon at least the other of the first and second ambient light signals of the other of the first and second displays.