LED Lighting Fixture With Side Driver Housing

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Solution Overview

Problem

High maintenance costs, warm-up time, flicker, humming noise, environmental hazards, and limited lifespan of metal halide HID lighting fixtures necessitate a more efficient and cost-effective lighting solution for public spaces.

Innovation Solution

A solid-state LED lighting fixture with a main housing supporting an array of LEDs, heat spreading fins, and side housings enclosing power supplies, designed to match or exceed the brightness and performance of HID fixtures while reducing thickness and energy consumption.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Illumination intensity

If metal halide HID lighting fixtures are used, then high brightness output is achieved, but high maintenance costs and long warm-up time occur

Engineering Contradiction:

Improvebrightness outputVSAvoidwarm-up time

Core Design Contradiction:

Illumination intensityVSLoss of time

Solution Approach 1:

The patent replaces the metal halide gas discharge system with a solid-state LED lighting system. LEDs provide instantaneous illumination without warm-up time while maintaining high brightness output through high-power LED arrays, fundamentally substituting the thermal and gas-phase mechanisms of HID lamps with solid-state electroluminescence.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent changes the operating parameters by using high-power LED modules that can deliver immediate full brightness. The LED drivers and heat sinking systems are designed to manage the electrical and thermal parameters of high-power LEDs, enabling instantaneous operation without the warm-up requirements of metal halide lamps.

Inventive Principle:

Principle #35Parameter changes

2Illumination intensity

If metal halide HID lighting fixtures are used, then high brightness output is achieved, but high maintenance costs occur

Engineering Contradiction:

Improvebrightness outputVSAvoidmaintenance cost

Core Design Contradiction:

Illumination intensityVSEase of manufacture

Solution Approach 1:

The patent replaces the fragile metal halide bulb system with robust solid-state LED modules. LEDs have no filament, no gas seal, and no internal pressure issues, eliminating the common failure modes of HID lamps and significantly reducing maintenance requirements and costs.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent uses high-power LED modules that provide excessive brightness capacity compared to traditional HID lamps. This over-capacity design ensures long operational life and reliability, reducing the frequency of replacement and maintenance interventions.

Inventive Principle:

Principle #16Partial or excessive action

3Illumination intensity

If metal halide HID lighting fixtures are used, then high brightness output is achieved, but flicker and humming noise occur

Engineering Contradiction:

Improvebrightness outputVSAvoidflicker and humming noise

Core Design Contradiction:

Illumination intensityVSObject-generated harmful factors

Solution Approach 1:

The patent replaces the gas discharge and thermal cycling mechanisms of metal halide lamps with solid-state LED electroluminescence. LEDs operate through electron-hole recombination in a solid material, producing light without gas discharge, thermal expansion, or mechanical stress that cause flicker and humming in HID lamps.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

4Illumination intensity

If metal halide HID lighting fixtures are used, then high brightness output is achieved, but environmental hazards occur

Engineering Contradiction:

Improvebrightness outputVSAvoidenvironmental hazard

Core Design Contradiction:

Illumination intensityVSObject-affected harmful factors

Solution Approach 1:

The patent replaces the metal halide gas discharge system with solid-state LED technology. LEDs contain no mercury, no toxic gases, and no hazardous materials, eliminating the environmental hazards associated with HID lamp disposal and handling while maintaining high brightness output.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

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 LED lighting fixture provides improved light efficiency, longer lifespan, reduced maintenance, and environmental benefits by offering instantaneous turn-on, no flicker or humming, and mercury-free operation, with a rated cycle life of approximately 50,000 hours, meeting or exceeding HID performance with lower energy usage.

Implementation Method 1

A plurality of heat spreading fins are arranged on the top surface of the main housing

Methodology Applied

Scientific EffectThermal conduction: Conduction (thermal)

Data Source

PatentUS9212808B2LED lighting fixture

Publication Date: 2015.12.15 IDEAL IND LIGHTING LLC

AI summary

A light-emitting diode (LED) lighting fixture is provided as a potential solid state lighting (SSL) replacement fixture for a conventional HID lamp fixture. The LED lighting fixture includes a main housing having a bottom surface supporting an array of LEDs, a top surface and sides, and at least one driver provided in a side housing attached to a side of the main housing to drive the LED array. The thickness of the side housing is equal to or greater than the thickness of the main housing. A plurality of heat spreading fins is arranged on the top surface of the main housing.