Adjustable Optic Lighting Device Heat Dissipation

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Solution Overview

Problem

Lighting devices with moveable LED components face challenges in heat dissipation, leading to reduced brightness due to inefficient heat transfer, and adjusting the light beam direction often results in light loss or obstruction by the housing.

Innovation Solution

A lighting device assembly with a heat sink attached to the LED, allowing it to pivot freely while remaining within a recess of the optic, ensuring continuous heat dissipation and minimizing light loss by maintaining the LED within a fixed relation to the optic throughout its adjustable motion.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the LED component is mounted on a moveable structure to adjust light beam direction, then the direction of emitted light can be adjusted, but heat transfer efficiency deteriorates leading to reduced brightness

Engineering Contradiction:

Improvelight beam direction adjustmentVSAvoidLED brightness

Core Design Contradiction:

Adaptability or versatilityVSIllumination intensity

Solution Approach 1:

The device is divided into separate functional components: a stationary heat sink assembly that remains fixed to the housing, and a moveable optic assembly that can rotate independently. This segmentation allows the heat dissipation function to remain stationary while the lighting function becomes adjustable, resolving the contradiction between adaptability and brightness maintenance.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

A stationary heat sink acts as an intermediary between the moveable LED/optic assembly and the housing. The heat sink provides a stable thermal pathway to the housing while allowing the LED and optic to move freely for direction adjustment, thus maintaining heat transfer efficiency while enabling directional control.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Illumination intensity

If the LED component is mounted directly to a fixture housing for heat dissipation, then heat transfer efficiency improves, but the ability to adjust light beam direction is lost

Engineering Contradiction:

ImproveLED brightnessVSAvoidlight beam direction adjustment

Core Design Contradiction:

Illumination intensityVSAdaptability or versatility

Solution Approach 1:

Inventive Principle:

Principle #1Segmentation

3Adaptability or versatility

If the fixture head is moved together with the optics to adjust light direction, then directional control is achieved, but light is blocked by the bezel or housing

Engineering Contradiction:

Improvelight beam direction adjustmentVSAvoidlight loss

Core Design Contradiction:

Adaptability or versatilityVSLoss of energy

Solution Approach 1:

The device separates the moveable optic assembly from the stationary housing and heat sink assembly. This allows the optic to rotate freely through a wider range of angles without the housing or bezel interfering with the light path, reducing light loss while maintaining directional control capability.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The optic assembly is designed to be dynamically moveable relative to the stationary housing, allowing it to rotate and pivot to different positions. This dynamic configuration enables directional adjustment without the constraints of a fixed housing structure that would block the light path.

Inventive Principle:

Principle #15Dynamics

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 configuration maintains efficient heat transfer and reduces light loss, allowing for adjustable light beam direction without obstructing the light path, thereby enhancing the brightness and directional control of the lighting device.

Implementation Method 1

a light source, said light source being attached to a heat sink

Methodology Applied

Scientific EffectThermal conduction: Conduction (thermal)

Implementation Method 2

one or more reflective elements arranged on the recessed bottom surface and configured to refract light received from the light source at a critical angle

Methodology Applied

Scientific EffectRefraction: Refraction

Implementation Method 3

an emitting surface opposite the recessed bottom surface, the emitting surface configured to internally reflect the light refracted by the one or more reflective elements

Methodology Applied

Scientific EffectTotal internal reflection: Total Internal Reflection

Data Source

PatentUS10955112B2Adjustable optic and lighting device assembly

Publication Date: 2021.03.23 TROY CSL LIGHTING INC

AI summary

A lighting device includes: a light source; an optic device to pass at least some light from the light source; an optic assembly including a holding member having an interior volume to contain the optic device; and a housing member having a first curved surface defining a cavity to receive at least a portion of the holding member. The holding member has an outer surface having a curvature that slideably engages with the first curved surface of the housing member when the optic assembly is pivoted about the light source. The optic device includes a recessed bottom surface facing the light source, one or more reflective elements arranged on the recessed bottom surface to refract light received from the light source at a critical angle, and an emitting surface opposite the recessed bottom surface to internally reflect the light refracted by the one or more reflective elements to be absorbed.