Vehicle LED Linear Lighting Module Uniform Brightness
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Solution Overview
Problem
Existing vehicle LED lighting systems face issues with uneven brightness and low central light intensity, making them inadequate for daytime running light regulations, and often require increased numbers or power of LEDs, leading to higher costs and poor heat dissipation.
Innovation Solution
A vehicle LED linear lighting module featuring a printed circuit board with linearly arranged LEDs, an optical colloid with specifically designed optical surfaces, and a light conductor that enhances light collection and distribution, providing uniform brightness and flexibility for free-curve applications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the number of LEDs or power of LEDs is increased to meet daytime running light regulations, then the central light intensity is improved, but the cost increases and heat dissipation becomes poor
Solution Approach 1:
The patent introduces a light guide body as an intermediary component between the LEDs and the illuminating surface. This light guide body with specifically designed optical surfaces (first optical surface, second optical surface, and third optical surface) redirects and concentrates light from off-center LED positions to the central region, achieving high central light intensity without increasing LED count or power
Solution Approach 2:
The patent changes the optical parameters of the illuminating surface by designing specific optical surfaces on the light guide body. The first optical surface, second optical surface, and third optical surface are configured with specific angles and curvatures to control light reflection and refraction, thereby concentrating light to the center and improving illumination intensity without adding more LEDs
2Device complexity
If traditional light guiding strip is used with side light entry, then the structure is simple, but the visual uniformity is limited by length and bending
Solution Approach 1:
The patent employs curved optical surfaces (first optical surface, second optical surface, and third optical surface) on the light guide body to replace the traditional linear light guiding strip. These curved surfaces enable better light distribution and visual uniformity while maintaining structural simplicity, overcoming the limitations of length and bending in traditional designs
3Ease of manufacture
If flat silica gel illuminating surface is used, then the manufacturing is simple, but the light diverges and central light intensity cannot be improved
Solution Approach 1:
The patent replaces the flat silica gel illuminating surface with a light guide body featuring curved optical surfaces. The first optical surface, second optical surface, and third optical surface are designed with specific curvatures and angles to concentrate light to the center, achieving high central light intensity while remaining manufacturable through injection molding or similar processes
4Ease of manufacture
If reflective film method is used to evenly diffuse light, then the manufacturing is simple, but the central light intensity becomes weak
Solution Approach 1:
The patent introduces a light guide body as an intermediary optical component that replaces the reflective film method. This light guide body with specifically designed optical surfaces actively directs and concentrates light to the center, whereas the reflective film only passively diffuses light evenly, resulting in weaker central intensity
Solution Approach 2:
The patent changes the optical parameters from diffuse reflection (reflective film) to controlled refraction and reflection through curved optical surfaces. The specific angles and curvatures of the first, second, and third optical surfaces are designed to concentrate light to the center, achieving high central intensity while maintaining ease of manufacture
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 module achieves high brightness uniformity and increased light intensity, meeting regulatory requirements while reducing module size and production costs, and allowing for dynamic lighting effects.
Implementation Method 1
a light conductor, disposed on the optical colloid and comprising a light incident surface and a light exit surface, wherein a light path formed of the light incident surface and the light exit surface is parallel with the first axial direction
Implementation Method 2
an optical colloid, integrally formed on the at least one printed circuit board and covering each of the plurality of light emitting diodes in a full coverage
Data Source
AI summary
A vehicle LED linear lighting module is provide, including at least one printed circuit board, at least one light bar, an optical colloid and a light conductor. The light bar is disposed on the printed circuit board and composed of a plurality of light emitting diodes in a linear lighting and arranged with equal pitches. The optical colloid has a first optical surface, a second optical surface and a third optical surface, and covers the plurality of light emitting diodes in a full coverage. By using different optical surfaces of the optical colloid and the arrangement of the light incident surface and the light exit surface of the optical conductor, the light strip can greatly improve the light effect.