Vehicle Interior Illumination with Region-Specific Intensity Control
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Solution Overview
Problem
Conventional vehicle interior illumination devices lack differentiation in illumination intensity based on the driver's field of view, leading to either excessive brightness or inadequate illumination, causing discomfort and distraction.
Innovation Solution
A vehicle interior illumination system comprising multiple illumination units and a controller that adjusts their intensities differently based on their longitudinal and vertical positions relative to the driver, ensuring appropriate lighting by creating a sharp contrast in illumination changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If uniform illumination intensity is applied to all interior lights, then the vehicle interior is properly illuminated as a whole, but the driver feels nuisance due to excessive brightness in certain positions
Solution Approach 1:
The patent applies local quality by differentiating illumination intensity based on the driver's field of view. Lights positioned in the driver's direct line of sight (upper part of passenger compartment) are controlled at lower intensity, while lights in areas less visible to the driver (lower part of passenger compartment) are controlled at higher intensity. This resolves the contradiction by maintaining overall illumination while eliminating localized brightness nuisance to the driver.
2Illumination intensity
If illumination intensity is increased to ensure proper illumination, then the vehicle interior is well-lit, but the driver experiences distraction and nuisance
Solution Approach 1:
The system divides the passenger compartment into multiple regions based on the driver's viewing angle and field of view. By applying different illumination intensities to different regions - specifically reducing intensity in the upper regions that are easily viewed by the driver - the patent ensures adequate overall illumination while preventing driver distraction and maintaining driving safety.
3Device complexity
If uniform illumination control is applied to all regions, then the control system is simple, but the illumination does not account for driver's field of view and causes nuisance
Solution Approach 1:
The patent segments the passenger compartment into multiple illumination regions (upper part and lower part) based on the driver's field of view and viewing angle. The illumination controller is configured to independently control the intensity of lights in each region, applying lower intensity to upper regions and higher intensity to lower regions. This segmentation approach resolves the contradiction by eliminating illumination nuisance through differentiated control while maintaining reasonable system complexity.
Data Source
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AI summary
The present invention provides a vehicle interior illumination device that can appropriately illuminate a vehicle interior or passenger compartment without distracting the driver. The vehicle interior illumination device is provided with a first illumination unit (1) for illuminating a first region (A) in the front and upper part of the passenger compartment, a second illumination unit (2) for illuminating a second region (B) in the vehicle rearward of the first region and in the upper of the passenger compartment, a third illumination unit (3) for illuminating a third region (C) in the vehicle downward than the first region (A) and in the front part of the passenger compartment, a fourth illumination unit (4) for illuminating a fourth region (D) vehicle rearward than the first region (A) and in the vehicle downward part, and an illumination controller (5). While the vehicle is running, the illuminating controller (5) differentiates the illumination intensity of the first illumination unit (1) relative to that of the fourth illumination unit (4) or/and the illumination intensity of the second illumination unit (2) relative to the illumination intensity of the third illumination unit (3).