US 9,310,030 B2
NON-UNIFORM DIFFUSER TO SCATTER LIGHT INTO UNIFORM EMISSION PATTERNGeneral
US 9,310,030 B2
NON-UNIFORM DIFFUSER TO SCATTER LIGHT INTO UNIFORM EMISSION PATTERN
Tech Center:
2800 Semiconductors/Memory, Circuits/Measuring and Testing, Optics/Photocopying, Printing/Measuring and Testing
Examiner:
Anh Mai
Art Unit:
2875 Optics
Inventors:
TAO TONG; Ronan Letoquin; Bernd Keller; Eric Tarsa; Mark Youmans; Theodore Lowes; Nicholas W. Medendorp; Antony Van De Ven; Gerald Negley; Peter Guschl; Zongjie Yuan
Assignee:
INTENSITY LIGHTING COMPANY, LLC
Priority:
10/08/10
Filed:
10/08/10
Granted:
04/12/16
Expiration:
03/28/30
Abstract
A lighting device comprising a light source and a diffuser spaced from the light source. The lighting device further comprises a wavelength conversion material disposed between the light source and the diffuser and spaced from the light source and the diffuser, wherein the diffuser is shaped such that there are different distances between the diffuser and said conversion material at different emission angles. In other embodiments the diffuser includes areas with different diffusing characteristics. Some lamps are arranged to meet A19 and Energy Star lighting standards.
Cooperative Patent Classification (CPC)
H01H01L2224/48091H01LF21K9/232F21V29/505F21Y2115/10F21K