Rules for efficient light sources using phosphor converted LEDs

US7884382B2 · kind B2 · utility

Assignee

• GE LIGHTING SOLUTIONS LLC · US

Inventors

• Anant Achyut Setlur · Niskayuna, US
• Steven Jude Duclos · Niskayuna, US
• Josesph Shiang · Niskayuna, US
• Alok Mani Srivastava · San Francisco, US
• Holly Ann Comanzo · Niskayuna, US
• Stanton Earl Weaver · Broadalbin, US
• Charles Becker · Rexford, US
• Thomas F. Soules · Cleveland Heights, US

Key dates

• Filing date: Feb 22, 2005
• Grant date: Feb 8, 2011
• Expiry date: Jun 21, 2026

Classification

• Technology area (CPC H): Electricity
• CPC primary: H10H20/8512
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

An LED lamp including an LED and one or more phosphors, wherein for each phosphor, a figure of merit (FOM) defined as the product of (incident LED flux)×(excitation cross-section of the phosphor)×(phosphor material decay time) is less than 0.3. Such an arrangement provides a light emitting device with improved lumen output and color stability over a range of drive currents.