Vehicle Lamp Fitting With Internally Reflecting Surface For Uniform Light
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Vehicle lamp fittings with light sources at both ends experience non-uniform light emission, leading to increased light intensity in overlapping regions and a deteriorated appearance.
Innovation Solution
A vehicle lamp fitting design featuring a first and second light source, a light guide with entrance and emission surfaces, and internally reflecting surfaces, including a third reflecting surface in a bent portion that limits light intensity and directs light emission uniformly, preventing light from being emitted externally from specific regions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If light sources are provided at both ends of a light guide, then the light guide can emit light from both ends, but the light intensity becomes non-uniform in overlapping regions causing appearance deterioration
Solution Approach 1:
The patent applies local quality by creating different reflecting surface configurations in different regions of the light guide. Specifically, the first and second reflecting surfaces are positioned to reflect light from first and second light sources respectively, while the third reflecting surface is positioned to prevent overlapping light from being emitted. This local differentiation of reflecting surface properties achieves uniform light emission appearance while maintaining the dual light source configuration.
2Ease of operation
If multiple reflecting surfaces are used to control light from both ends, then light direction can be controlled, but the complexity of the internally reflecting surface increases
Solution Approach 1:
The patent segments the internally reflecting surface into distinct regions with specific functions: first reflecting surfaces for directing light from the first light source, second reflecting surfaces for directing light from the second light source, and third reflecting surfaces for preventing overlapping light emission. This segmentation allows independent control of light paths from each end while maintaining overall system manageability through clear functional zoning.
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
The design ensures uniform light emission and maintains the appearance quality by controlling light intensity and direction within the lamp fitting, preventing focal points and enhancing the regularity of light patterns.
Implementation Method 1
an internally reflecting surface which causes light that has entered through the above-mentioned entrance surfaces to be reflected
Data Source
AI summary
Problem: To provide a vehicle lamp fitting in which regularity of the strength or weakness of the emitted light is maintained and deterioration of appearance is suppressed. Solution: A vehicle lamp fitting 10 comprises a light guide 11 which guides light from an LED light source 12 and an LED light source 13, the light guide 11 having entrance surfaces 110, 111, emission surfaces R1 to R3, and an internally reflecting surface 17 which causes light that has entered through the entrance surfaces 110, 111 to be reflected, and the internally reflecting surface 17 comprises a reflecting surface 141 which is provided in a first region 14 and which emits light from the LED light source 12 in a forward direction, a reflecting surface 151 which is provided in a second region 15 and which emits light from the LED light source 13 in the forward direction, and a reflecting surface 161 which is formed in a third region 16 between the first region 14 and the second region 15 and which limits the light intensity with which light from the LED light sources 12, 13 is emitted in the forward direction from the emission surface R3.