Vehicle Lamp Pixel Brightness Control for Blind Zone Compensation
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Solution Overview
Problem
Vehicle headlamps with defective components create blind zones in beam patterns, degrading driver vision and increasing replacement costs due to unnecessary light obstruction.
Innovation Solution
A vehicle lamp with a light source portion comprising multiple controllable light emitting areas, a defect detector, and a brightness controller that adjusts brightness levels to compensate for defective areas by increasing light emission in adjacent areas, preventing blind zones and maintaining driver vision without costly replacements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a headlamp includes a shield and actuator for beam pattern conversion, then the headlamp can form low beam and high beam patterns, but when a defect occurs in these components, blind zones occur in the beam pattern degrading driver vision
Solution Approach 1:
The headlamp is divided into multiple independently controllable light emitting areas (pixels) arranged in an array. Each light emitting area can be controlled separately to emit or not emit light, allowing the system to form different beam patterns by selectively activating specific segments. This segmentation enables the system to maintain functionality even when some segments are defective, as other segments can compensate to prevent blind zones.
Solution Approach 2:
The system dynamically adjusts the brightness and emission state of individual light emitting areas based on real-time detection of defective areas. When a defect is detected in a light emitting area, the system dynamically reconfigures the beam pattern by adjusting adjacent light emitting areas to compensate, ensuring continuous coverage and preventing blind zones without requiring physical replacement of defective components.
2Reliability
If a defective component in the headlamp is replaced, then the blind zone is eliminated, but replacement costs increase
Solution Approach 1:
The headlamp system performs self-diagnosis and self-repair through its defect detection unit that continuously monitors light emitting areas for defects. When a defect is detected, the brightness controller automatically compensates by adjusting adjacent light emitting areas to cover the blind zone, allowing the system to maintain functionality without external intervention or component replacement, thereby eliminating maintenance costs associated with defective parts.
Solution Approach 2:
Instead of discarding the entire headlamp or replacing defective components, the system recovers functionality by utilizing adjacent healthy light emitting areas to compensate for defective ones. The defect detection unit identifies faulty areas, and the brightness controller redistributes light emission to adjacent areas, effectively recovering the lost functionality without physical replacement of components.
3Illumination intensity
If all light emitting areas operate at maximum brightness, then the beam pattern provides maximum illumination, but energy consumption increases and adjacent defective areas cannot be compensated
Solution Approach 1:
The system applies local quality by controlling each light emitting area with different brightness levels based on its specific function and status. Light emitting areas adjacent to detected defective areas are assigned higher brightness levels to compensate for blind zones, while other areas operate at lower brightness levels. This localized brightness adjustment maintains necessary illumination for safety while reducing overall energy consumption compared to operating all areas at maximum brightness.
Data Source
AI summary
The present disclosure relates to a lamp for a vehicle, and more particularly, to a lamp for a vehicle which is capable of preventing occurrence of a blind zone caused by a defect. The lamp includes a light source portion with a plurality of light emitting areas in which brightness of generated light is separately controllable and a brightness controller which is configured to cause the plurality of light emitting areas to generate light at a first brightness level to form a beam pattern and to cause at least one of the light emitting areas, which is disposed proximate to a defective area which includes at least one faulty area, to generate light at a second brightness level.