White light LED devices with flat spectra
First Claim
Patent Images
1. a lighting device for emitting white light comprising:
- a light source emitting radiation having a peak emission in the range from about 350 nm to about 430 nm; and
a phosphor material radiationally coupled to the light source, wherein an emission of the lighting device has an emission intensity conformance within ±
20% with a reference CIE illuminant at least in the spectral interval from 450 to 650 nm.
7 Assignments
0 Petitions
Accused Products
Abstract
A light emitting apparatus including a phosphor blend including two or more phosphors to provide an emission spectrum simulating the spectral power distribution of a CIE reference illuminant across at least a certain spectral range. Such an apparatus is particularly suited for color-critical applications.
143 Citations
20 Claims
-
1. a lighting device for emitting white light comprising:
-
a light source emitting radiation having a peak emission in the range from about 350 nm to about 430 nm; and
a phosphor material radiationally coupled to the light source, wherein an emission of the lighting device has an emission intensity conformance within ±
20% with a reference CIE illuminant at least in the spectral interval from 450 to 650 nm. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
-
-
14. A method for producing a lighting device, comprising:
-
providing a light source emitting radiation having a peak emission in the range from about 350 nm to about 430 nm; and
radiationally coupling a phosphor blend to the light source;
wherein said phosphor blend is obtained by i) providing a blue emitting phosphor material, a green emitting phosphor material and a red emitting phosphor material, and ii) blending said blue, green and red phosphor materials in appropriate quantities to form a blend having a color point having a desired pair of color coordinates for its combined plaque emission spectra on the 1931 CIE chromaticity diagram;
such that an emission of the lighting device has an emission intensity conformance within ±
20% with a reference CIE illuminant at least in the spectral interval from 450 to 650 nm. - View Dependent Claims (15, 16, 17)
-
-
18. A lighting device for emitting white light comprising:
-
a light source emitting radiation having a peak emission in the range from about 350 nm to about 430 nm; and
a phosphor material radiationally coupled to the light source, wherein an emission of the lighting device has an emission intensity conformance within ±
10% with CIE illuminant E at least in the spectral region from 450 to 650 nm.
-
-
19. A lighting device for emitting white light comprising:
-
a light source emitting radiation having a peak emission in the range from about 250 nm to about 410 nm; and
a phosphor material radiationally coupled to the light source, wherein an emission of the lighting device has an emission conformance within an intensity range of ±
15% with a reference CIE illuminant at least in the spectral interval from 400 to 700 nm. - View Dependent Claims (20)
-
Specification