Rules For Efficient Light Sources Using Phosphor Converted Leds
First Claim
Patent Images
1. A light emitting device comprising an LED and one or more phosphor materials, wherein for each phosphor material, the product of (incident LED flux)×
- (excitation cross-section of the phosphor)×
(phosphor material decay time) is less than 0.3.
4 Assignments
0 Petitions
Accused Products
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.
-
Citations
16 Claims
-
1. A light emitting device comprising an LED and one or more phosphor materials, wherein for each phosphor material, the product of (incident LED flux)×
- (excitation cross-section of the phosphor)×
(phosphor material decay time) is less than 0.3. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
- (excitation cross-section of the phosphor)×
-
16. A method for producing a phosphor conversion LED lamp, the method comprising the steps of providing an LED chip and subsequently depositing one or more phosphor materials over the LED chip, wherein the phosphor materials are selected and deposited such that for each phosphor material, the product of (incident LED flux)×
- (excitation cross-section of the phosphor)×
(phosphor material decay time) is less than 0.3.
- (excitation cross-section of the phosphor)×
Specification