Vehicle HUD Luminance Control via External Illuminance
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Solution Overview
Problem
Existing vehicle display systems, particularly those with head-up displays (HUDs), face usability issues due to the inability to independently set the luminance of HUDs and meters, which are adjusted based on a single switch setting, neglecting external illuminance conditions.
Innovation Solution
A vehicle display apparatus comprising a first indicator, a second indicator, a luminance setting device, and an illuminance detector, allowing the HUD luminance to be adjusted based on external illuminance, independent of daytime or nighttime settings, enabling flexible control and improved usability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the luminance of the HUD is adjusted based on a single switch setting, then the device complexity is reduced, but the ease of operation deteriorates because individual luminance settings for meter and HUD cannot be achieved
Solution Approach 1:
The luminance control system is segmented into independent control paths: the meter luminance is controlled by a first switch while the HUD luminance is controlled by a second switch, allowing independent adjustment of each display device without requiring a complex unified control system
Solution Approach 2:
The HUD luminance control is made dynamic by introducing an illuminance sensor that automatically adjusts the HUD luminance based on detected external light conditions, while still allowing manual override through the second switch, creating a flexible adaptive system
2Device complexity
If the HUD luminance is set according to fixed daytime and nighttime values, then the device complexity is reduced, but the adaptability deteriorates because external illuminance conditions are not reflected
Solution Approach 1:
An illuminance sensor provides feedback about external lighting conditions to the HUD control system, enabling automatic adjustment of HUD luminance to match actual environmental conditions, improving adaptability while maintaining simple fixed-value backup options
Solution Approach 2:
The system changes the luminance parameter of the HUD dynamically based on detected illuminance levels, transitioning between fixed daytime/nighttime settings and adaptive illuminance-based settings to optimize visibility under varying environmental conditions
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 allows for flexible adjustment of HUD luminance according to external illuminance, enhancing usability by reflecting user-set luminance settings for both daytime and nighttime conditions, thereby improving the visibility of HUD information.
Implementation Method 1
an illuminance detector configured to detect illuminance outside the vehicle
Data Source
AI summary
A vehicle display apparatus includes a first indicator, a second indicator, and an illuminance detector. The illuminance detector is configured detect illuminance outside a vehicle. Display luminance of the second indicator is capable of being changed in a specific luminance range in accordance with the illuminance outside the vehicle detected by the illuminance detector irrespective of daytime or nighttime. A luminance setting device is configured to set the specific luminance range. A controller is configured to increase or decrease the display luminance of the second indicator at least in a portion of the specific luminance range set by the luminance setting device based on display luminance for each of daytime and nighttime of the first indicator set by the luminance setting device.