Vehicle Display Luminance Control for Outside Visibility
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Solution Overview
Problem
In vehicles with multiple display areas, the increased luminance in dark environments causes visual attraction and reduces outside visibility, particularly for drivers, as the higher display areas become more noticeable in low light conditions.
Innovation Solution
A vehicle control device that adjusts the luminance of display areas based on outside brightness, suppressing the luminance of upper display areas when outside brightness is higher than a threshold and lower display areas when outside brightness is equal to or lower than the threshold, thereby reducing visual attraction and improving outside visibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the luminance of display areas is increased to improve visibility of display information, then the visibility of display information is improved, but visual attraction occurs in dark environments which reduces outside visibility
Solution Approach 1:
The patent applies local quality by differentiating luminance control between upper and lower display areas based on their position. The control unit suppresses luminance of the upper display area more than the lower display area when outside brightness is low, recognizing that upper areas cause more visual attraction. This localized differentiation resolves the contradiction by optimizing luminance distribution rather than uniform control.
Solution Approach 2:
The patent implements dynamic luminance adjustment based on detected outside brightness levels. The control unit continuously monitors outside brightness and dynamically suppresses display area luminance accordingly, transitioning from high luminance in bright environments to suppressed luminance in dark environments. This dynamic adaptation resolves the contradiction by making luminance responsive to environmental conditions.
2Object-affected harmful factors
If the luminance of upper display areas is suppressed to reduce visual attraction, then outside visibility is improved, but visibility of display information in the upper area may be reduced
Solution Approach 1:
The patent applies local quality by implementing differentiated luminance suppression for upper and lower display areas. The control unit suppresses luminance of the upper display area to reduce visual attraction while maintaining or adjusting luminance of the lower display area to ensure display information remains visible. This localized approach resolves the contradiction by optimizing visibility for each display area based on its position and impact on outside visibility.
Solution Approach 2:
The patent implements feedback by continuously detecting outside brightness and adjusting display luminance accordingly. The control unit monitors outside brightness levels and provides feedback control to maintain appropriate luminance balance between outside visibility and display information visibility, preventing excessive suppression that would compromise display readability.
3Object-affected harmful factors
If uniform luminance suppression is applied to all display areas, then visual attraction is reduced, but display information visibility in all areas is compromised
Solution Approach 1:
The patent resolves this contradiction by applying non-uniform luminance suppression where the upper display area receives greater suppression than the lower display area. This differentiated approach selectively reduces visual attraction from the upper area while preserving display information visibility in the lower area, avoiding the pitfalls of uniform suppression.
Solution Approach 2:
The patent changes the luminance parameter differentially across display areas based on their position. The control unit applies distinct luminance suppression levels to upper and lower display areas, with the upper area experiencing greater suppression. This parameter differentiation resolves the contradiction by optimizing the balance between reducing visual attraction and maintaining display visibility.
Data Source
AI summary
A vehicle control device comprises: an acquisition unit configured to acquire information of outside brightness of the vehicle; and a control unit configured to control, based on the outside brightness, luminance of a plurality of display areas including a first display area displayed by a first display unit for displaying a situation of the vehicle and a second display area displayed by a second display unit for displaying a situation of the vehicle, the second display area being displayed below the first display area, wherein when the outside brightness is higher than a first threshold, the control unit suppresses luminance of the first display area in accordance with a decrease in the outside brightness, and when the outside brightness is equal to or lower than the first threshold, suppresses luminance of the second display area in accordance with the decrease.