Downlight Fixture With Selectable Lumens And CCT

Solution Overview

Problem

Existing downlight fixtures lack flexibility in adjusting light output levels and correlated color temperature settings, requiring users to replace fixtures entirely to change light levels or color, which increases installation costs and complexity.

Innovation Solution

A downlight design incorporating a housing with integrated switches for selecting lumen settings and correlated color temperature, allowing for adjustable light output and color through a combination of local and remote controls, utilizing a light engine with multiple strings of LEDs that can be independently energized for different light modes.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If traditional downlight fixtures are used with fixed light bulbs, then the installation is simple and cost-effective, but the flexibility to adjust light output levels and color temperature is lost

Engineering Contradiction:

Improveflexibility to adjust light output and color temperatureVSAvoidfixture structure complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The downlight fixture is divided into multiple independent LED string modules, each capable of producing different color temperatures and light levels. This segmentation allows the fixture to offer varied lighting modes (warm white, cool white, daylight) by selectively activating different LED strings, providing flexibility without requiring complete fixture replacement.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The downlight fixture integrates multiple functions into a single device by incorporating LED strings with different color temperatures and control circuitry that enables adjustment of light output levels and color temperature selection. This multi-functionality allows one fixture to replace what previously required multiple different fixtures or bulb types.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Adaptability or versatility

If multiple downlight fixtures are installed to provide different light levels and colors, then the lighting options increase, but the installation cost and complexity increase

Engineering Contradiction:

Improvelighting options varietyVSAvoidnumber of fixtures required

Core Design Contradiction:

Adaptability or versatilityVSQuantity of substance

Solution Approach 1:

The downlight fixture integrates multiple functions into a single device by incorporating LED strings with different color temperatures and control circuitry that enables adjustment of light output levels and color temperature selection. This multi-functionality allows one fixture to replace what previously required multiple different fixtures or bulb types.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

Multiple LED strings with different color characteristics (warm white, cool white, daylight) are merged into a single downlight fixture, allowing all lighting options to be available in one unit rather than requiring separate fixtures for each lighting scenario.

Inventive Principle:

Principle #5Merging (Combining)

3Use of energy by moving object

If LED retrofit lamps are used to replace traditional bulbs, then energy efficiency improves, but the ability to adjust light levels and color temperature remains limited

Engineering Contradiction:

Improveenergy efficiencyVSAvoidadjustability of light settings

Core Design Contradiction:

Use of energy by moving objectVSAdaptability or versatility

Solution Approach 1:

The downlight fixture is divided into multiple independent LED string modules, each capable of producing different color temperatures and light levels. This segmentation allows the fixture to offer varied lighting modes (warm white, cool white, daylight) by selectively activating different LED strings, providing flexibility without requiring complete fixture replacement.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The fixture incorporates control circuitry and switches that enable dynamic adjustment of light output levels and color temperature selection, allowing the lighting characteristics to be changed on-demand based on user needs while maintaining LED energy efficiency.

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

Enables users to easily adjust light levels and color temperatures within a single downlight fixture, reducing installation costs and enhancing flexibility without the need for multiple fixtures, while maintaining energy efficiency and aesthetic control.

Implementation Method 1

a light engine including at least one string of light emitting diodes (LEDs), in which the light engine is positioned to emit light

Methodology Applied

Scientific EffectLight emitting diode: Light Emitting Diode

Data Source

PatentUS11317492B2Downlight with selectable lumens and correlated color temperature

Publication Date: 2022.04.26 LEDVANCE LLC

AI summary

A lamp is provided that can have at least one interface on the lamp body for a selectable lumens and selectable correlated color temperature (CCT). In one embodiment, the lamp design includes a housing having a downlight geometry and a light engine including at least one string of light emitting diodes (LEDs), in which the light engine is position to emit light through a light emission end of the housing having the downlight geometry. The lamp also includes at least one first switch for selecting at least one lumen setting for the light emitted by the light engine; and at least one second switch for selecting at least one correlated color temperature. The first and second switch are mounted to the housing.