Vehicular Lamp Unit with T-Shape LED Array for Adaptive Light Distribution
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Solution Overview
Problem
Existing vehicular lamp units with light emitting diodes struggle to dynamically adjust light distribution patterns according to vehicle speed and operating conditions, limiting their effectiveness in various driving scenarios.
Innovation Solution
A vehicular lamp unit configuration featuring light emitting elements disposed on an optical axis with a parabolic reflector, allowing for selective lighting of special and general light emitting chips to create adaptable light distribution patterns, including narrow and wide vertical distributions suitable for high-speed and urban driving.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If all light emitting elements are lighted simultaneously, then a single light distribution pattern is formed, but it is difficult to change the light distribution pattern according to vehicle running state
Solution Approach 1:
The light emitting elements are divided into multiple independently controllable groups. Each group can be selectively activated to produce different light distribution patterns (e.g., first pattern with all elements, second pattern with subset of elements). This segmentation enables the lamp unit to adapt to different vehicle running states without requiring complex mechanical moving parts.
2Use of energy by moving object
If a part of light emitting elements are lighted simultaneously, then power consumption is reduced, but the brightness of the light distribution pattern reduces
Solution Approach 1:
Different groups of light emitting elements are assigned to different spatial regions or functional zones. When operating in a power-saving mode, specific groups are selectively activated based on the required illumination pattern. The local quality of each group (its position and optical characteristics) is optimized so that even a subset of groups can provide adequate brightness for the intended application, balancing power consumption and illumination intensity.
3Area of stationary object
If light emitting elements are disposed horizontally to form prolonged light distribution pattern, then road surface irradiation is widened, but the light distribution pattern cannot be dynamically adjusted
Solution Approach 1:
The lamp unit incorporates multiple independently controllable light emitting elements arranged in a configuration that can produce different light distribution patterns. By dynamically controlling which elements are activated and at what intensity levels, the system can transition between different illumination patterns (e.g., wide horizontal spread for road surface irradiation, concentrated patterns for long-distance illumination) to adapt to varying vehicle running states such as speed, curvature, and ambient light 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
Enables efficient irradiation of road surfaces, enhancing visibility in distant areas at high speeds and providing wide coverage in urban environments with reduced power consumption by adjusting light distribution patterns based on vehicle speed and conditions.
Implementation Method 1
light emitting elements such as light emitting diodes have been employed frequently as the light source of the vehicular lamp unit
Implementation Method 2
a reflector having a reflection surface of a parabolic cylindrical plane shape... which reflects light emitted from the light emitting element to a forward direction
Data Source
AI summary
The reflection surface of a reflector is formed by a parabolic cylindrical plane extending in the horizontal direction orthogonal to an optical axis. A light emitting element is configured to have five light emitting chips arranged in a T-shape and these light emitting chips are lighted in two lighting modes. In the first lighting mode, a special light emitting chip and a pair of the left and right side special light emitting chips which front end edges are aligned on the focal line of the parabolic cylindrical plane are lighted simultaneously, whereby a light distribution pattern having a narrow vertical width and a prolong shape is formed. In the second lighting mode, a special light emitting chip located at the center portion and two general light emitting chips disposed in series on the backward side thereof are lighted simultaneously, whereby a light distribution pattern having a large vertical width and a prolong shape is formed.