Browse Prior Art Database

Cree XLamp® LEDs for Distributed Illumination Applications

IP.com Disclosure Number: IPCOM000201771D
Publication Date: 2010-Nov-22

Publishing Venue

The IP.com Prior Art Database

Abstract

This application note reviews the task-based illumination requirements for a broad set of applications, and the Energy Star requirements for several specific implementations. We’ll examine two of these applications in greater detail to review important design characteristics and production requirements to create attractive, (and where appropriate) Energy-Star-conformant luminaires and bulbs.

This text was extracted from a PDF file.
This is the abbreviated version, containing approximately 10% of the total text.

Page 01 of 12

(This page contains 00 pictures or other non-text object)

Cree XLamp® LEDs for Distributed Illumination Applications

Application Note

Table of Contents

Introduction...........................................................................................................................................1

General Requirements for Distributed Illumination................................................................................2

Incumbent Illumination Sources: Fluorescent Tubes and Related Incandescent............................................2

Lighting requirements (from ANSI/IESNA)..............................................................................................2

Performance requirements from Energy Star SSL....................................................................................2

Examples................................................................................................................................................ 3

T8 Emulation......................................................................................................................................3

Under-Cabinet Luminaires....................................................................................................................5

Discussion and Conclusions: Solutions Sets Using Arrays of XLamp LEDs....................................................9

Design Techniques..............................................................................................................................9

Power Supplies for Larger Arrays.....................................................................................................9

Circuit-Board Layout......................................................................................................................9

Optical Cavities.............................................................................................................................9

Appendix.............................................................................................................................................. 11

Illumination Categories from IESNA..................................................................................................... 11

Energy Star Requirements for Select Indoor and Outdoor Lighting Applications.......................................... 11

Introduction

In the first century of electric lighting, the now universal bulb-luminaire dichotomy gave rise to a variety of basic illumination (lamp or bulb) technologies, thousands of different styles and configurations of these lamps along with tens of thousands of luminaires. A large class of lighting problems, from cove lighting to in-ceiling troffers are implemented with single (or multiple) linear fLuorescent lamps (LFL).

Many of these same functional lighting requirements for distributed illumination can be solved by using arrays of small form factor LEDs. Under cabinet lighting, task lamps, outdoo...