Surface Light Source LED Device for Uniform Vehicle Lamp Illumination
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Solution Overview
Problem
Existing vehicle lamp technologies face challenges in achieving visually uniform, wide-angle light distribution with LED sources, including issues of non-uniform light emission, excessive size, and inefficiencies in design and manufacturing, particularly for customized lamp applications.
Innovation Solution
A surface light source LED device with tightly arranged LED dies and a primary lens structure, allowing for uniform light emission and efficient light usage, suitable for vehicle lamps.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If direct illumination LED is used, then high efficiency and multiple light sources are achieved, but uniform light distribution is not obtained
Solution Approach 1:
A light guide plate is introduced as an intermediary component between the LED light source and the external environment. The light guide plate receives light from multiple LED sources and redistributes it through total internal reflection and controlled light extraction, transforming the non-uniform LED output into uniform surface illumination while maintaining high lighting efficiency
Solution Approach 2:
The patent transitions from point-source LED illumination to a planar surface light source by using a light guide plate. This dimensional transformation allows light to be distributed across a two-dimensional surface area, achieving uniform illumination patterns that cannot be obtained with direct LED illumination alone
2Quantity of substance
If LED in combination with light diffusion materials is used, then quantity of LED can be reduced, but structure becomes larger and light intensity is attenuated
Solution Approach 1:
The light guide plate is designed as a thin planar structure that combines light guiding, diffusion, and reflection functions. This thin-film approach achieves the light diffusion effect without requiring bulky diffusion materials, maintaining compact structure while reducing LED quantity needed
Solution Approach 2:
The light guide plate serves multiple functions simultaneously: it acts as a light guide, a diffusion medium, and a reflection surface. This multi-functionality consolidates what would otherwise require separate components (LEDs, diffusion materials, reflectors) into a single integrated structure, reducing overall device size
3Quantity of substance
If light diffusion materials are used, then LED quantity can be reduced, but light intensity is attenuated and cannot meet high intensity requirements
Solution Approach 1:
The light guide plate acts as an optical intermediary that preserves light intensity while distributing it uniformly. Through optimized optical design including total internal reflection and controlled light extraction regions, the system maintains high light intensity output without requiring excessive LED quantities
Solution Approach 2:
The light guide plate incorporates regions with different optical properties - some areas with higher light extraction efficiency and others with lower extraction. This local variation in optical quality allows the system to maintain high overall light intensity while achieving uniform distribution across the surface
4Ease of manufacture
If conventional LED arrangement is used, then manufacturing is simplified, but uniformity requirement of not visually perceiving particle light source cannot be satisfied
Solution Approach 1:
The patent arranges LEDs in a linear one-dimensional pattern but uses the light guide plate to transform this into a two-dimensional uniform surface light source. This dimensional transformation allows simple linear LED placement to produce the complex effect of uniform areal illumination, satisfying visual uniformity requirements while maintaining manufacturing simplicity
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 device achieves visually uniform light distribution, fits into narrower lamp spaces, meets light distribution requirements, and reduces energy consumption, while maintaining high luminosity and aesthetic appeal.
Implementation Method 1
a light guide plate for guiding a light
Implementation Method 2
a primary lens structure having features of extremely thin thickness and narrow width
Data Source
Figure 1
Figure 2A~2C
Figure 3
AI summary
A surface light source LED device includes a circuit board (40a), at least one power input (71, 72) and at least two LED bar elements (51, 52), the at least two LED bar elements (51, 52) are arranged in a staggered manner, and each of the LED bar elements (51, 52) includes a plurality of LED bars (10) arranged linearly on the circuit board (40a). Each of the LED bars (10) has a straight strip structure and has a plurality of LED dies (21-24) of the same type provided inside. The plurality of LED dies (21-24) is arranged linearly at equal intervals.