LED Lamp Heatsink with Multi-Directional Light Distribution

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Solution Overview

Problem

Conventional LED lamps face challenges in replicating the light distribution characteristics of incandescent lamps, with limited ability to radiate light sideways and backwards, and inefficient heat dissipation, leading to reduced performance and reliability due to heat generation.

Innovation Solution

The LED lamp design features LEDs mounted on both upper and side portions of a heatsink, with a modified reflecting surface to increase the orientation angle and a heat dissipation structure that includes heat sinks and pads to efficiently dissipate heat, allowing for light emission in multiple directions and improved heat management.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Illumination intensity

If LEDs are mounted only on the upper portion of the lamp, then the structure is simple, but the light distribution characteristics cannot match incandescent lamps (cannot radiate light sideways and backwards)

Engineering Contradiction:
Improvelight distribution characteristicsVSAvoidmounting structure complexity
Core Design Contradiction:
Illumination intensityVSDevice complexity

Solution Approach 1:

The patent applies dimensionality change by transitioning from a single-plane (upper portion only) LED mounting arrangement to a multi-dimensional configuration where LEDs are mounted on both the upper and side portions of the lamp body. This spatial expansion enables light to be radiated in multiple directions (forwards, sideways, and backwards), replicating the omnidirectional light distribution characteristics of incandescent lamps while maintaining a relatively simple structural implementation.

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

2Power

If high current is provided to achieve high-powered light emission, then light power increases, but heat generation increases

Engineering Contradiction:
Improvelight powerVSAvoidheat generation
Core Design Contradiction:
PowerVSTemperature

Solution Approach 1:

The patent applies the 'blessing in disguise' principle by converting the harmful effect of heat generation into a beneficial heat dissipation mechanism. The patent design incorporates a heat dissipation structure that utilizes the natural convection of air and thermal radiation to efficiently transfer and dissipate the heat generated by high-current LED operation. This allows the system to maintain high light power output while effectively managing the inevitable heat production, preventing overheating and maintaining LED reliability.

Inventive Principle:
Principle #22Blessing in disguise (Convert harm into benefit)

3Reliability

If heat is not effectively dissipated, then LED operation efficiency decreases and color distortion occurs, but adding heat dissipation structures increases device complexity

Engineering Contradiction:
ImproveLED operation stabilityVSAvoidheat dissipation structure complexity
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The patent applies the universality principle by designing a heat dissipation structure that serves multiple functions simultaneously. The same structural elements that provide mechanical support and housing for the LEDs also function as heat dissipation components through integrated heat sinks and convection channels. This multi-functional design effectively dissipates heat to maintain LED operation stability and prevent color distortion without significantly increasing overall device complexity, as the heat dissipation features are incorporated into existing structural elements rather than adding separate dedicated components.

Inventive Principle:
Principle #6Universality (Multi-functionality)

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 design achieves light distribution characteristics similar to incandescent lamps by radiating light forwards, sideways, and backwards, while effectively dissipating heat, enhancing the performance and reliability of the LED lamp.

Implementation Method 1

a heatsink for dissipating heat generated from the first and second light sources to an outside

Methodology Applied
Scientific EffectHeat dissipation: Convection

Implementation Method 2

the heatsink comprises a first mounting area on which the first substrate is mounted and an inclined surface on which the second substrate is mounted

Methodology Applied
Scientific EffectThermal conduction: Conduction (thermal)

Implementation Method 3

a reflecting surface is provided through modification of a partial shape of the heatsink. The reflecting surface is disposed at a side of the heatsink to reflect light that is radiated sideways and backwards

Methodology Applied
Scientific EffectLight reflection: Reflection

Implementation Method 4

at least one first light source mounted on a first substrate; at least one second light source mounted on a second substrate

Methodology Applied
Scientific EffectLight emission from LED: Light Emitting Diode

Data Source

PatentUS9447957B2LED lamp
Publication Date: 2016.09.20 SEOUL SEMICONDUCTOR
  • US9447957B2 patent drawing
  • US9447957B2 patent drawing
  • US9447957B2 patent drawing

AI summary

The present invention relates to an LED lamp. In the LED lamp, light may be emitted in lateral and rear directions as well as in a front direction to obtain light distribution characteristics similar to those of an incandescent lamp, and heat generated when the LED emits light may be effectively dissipated.