Multi-element LED Lamp Package with Independent Beam Control
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Solution Overview
Problem
Current LED light source assemblies for vehicular headlights are inefficient due to the need for multiple packages to achieve desired brightness and directionality, which increases cost and reduces packaging efficiency, and fail to meet standardized light distribution requirements for low beam headlamps.
Innovation Solution
A multi-LED light source assembly with multiple LED elements in a single package, where each LED can be independently switched to focus light in different directions, using a common reflector, lead frame, and lens, allowing for adjustable intensity, color, and direction of light.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If multiple LED packages are used to achieve desired brightness and directionality, then the light distribution requirements can be met, but the cost increases and packaging efficiency decreases
Solution Approach 1:
The patent combines multiple LED elements (first LED element and second LED element) into a single integrated lamp package, eliminating the need for multiple separate packages. The LED array structure allows multiple light-emitting elements to be arranged in a predetermined pattern within one package, achieving the desired brightness and directionality while reducing overall complexity and improving packaging efficiency.
Solution Approach 2:
The patent segments the light distribution function by assigning different LED elements to different spatial positions and orientations within the single package. The first LED element directs light in a first direction while the second LED element directs light in a second direction, allowing independent control of light distribution patterns to meet standardized requirements.
2Illumination intensity
If multiple LED packages are used to achieve desired brightness and directionality, then the light distribution requirements can be met, but packaging efficiency is reduced
Solution Approach 1:
The patent merges multiple LED elements into a single compact lamp package with a shared housing, common mounting structure, and integrated heat dissipation system. This consolidation significantly reduces the total footprint compared to using multiple separate packages, while maintaining the ability to achieve standardized light distribution patterns through the arranged LED array.
Solution Approach 2:
The patent utilizes three-dimensional spatial arrangement of LED elements within the single package, positioning LEDs at different locations and orientations to achieve various light distribution patterns. This dimensional approach allows multiple functions to be packed into a compact volume, improving packaging efficiency without compromising performance.
3Device complexity
If a single LED element is used in a reflector cup, then the package structure is simple, but the light distribution characteristics cannot satisfy standardized requirements for low beam headlamps
Solution Approach 1:
The patent divides the light distribution function among multiple LED elements positioned at different locations within the reflector cup. Each LED element can be independently controlled to contribute to specific portions of the beam pattern, enabling compliance with standardized light distribution requirements while maintaining a relatively simple single-package structure.
Solution Approach 2:
The patent assigns different spatial positions and orientations to different LED elements within the package, allowing each element to optimize its light contribution for a specific direction or region. This local optimization enables the overall system to meet standardized light distribution characteristics while keeping the package structure simple and integrated.
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
This solution reduces the number of lamp packages, minimizes footprint, and enhances design options by enabling independent control of each LED, thus improving packaging efficiency and meeting the requirements for light distribution in vehicular lighting applications.
Implementation Method 1
A LED is a solid-state device having a PN junction semiconductor diode that emits light when a current is applied
Implementation Method 2
a reflector cup having a vertex, a focal point, a principal axis, an inside surface, and an open face
Data Source
Figure 1~2
Figure 3~4
Figure 5~8
AI summary
A light emitting diode (LED) package (191) comprises a first LED sub-assembly (192) comprising a first LED die (170A), a first reflector (164A) having a first principal axis (179A), and a first lens (160A). The LED package (191) also comprises a second LED sub-assembly (193) comprising a second LED die (170B), a second reflector (164B) having a second principal axis (179B), and a second lens (160B). The LED package (191) further comprises a common lead frame (176). The first LED sub-assembly (192) and the second LED sub-assembly (193) are mounted to the common lead frame (176). The first LED sub-assembly (192) is adapted to emit a first beam centered in a first direction, and the second LED sub-assembly (193) is adapted to emit a second beam centered in a second direction that is non-parallel to the first direction.