Title:
拡散レンズ及びこれを採用した発光装置
Document Type and Number:
Japanese Patent JP6804693
Kind Code:
B2
Abstract:
A diffusing lens (40) and a light emitting device using the same are provided. The diffusing lens (40) includes an input portion (11; 11') concavely formed on a bottom surface of a lens body (10; 10') and having a first convex portion (12) at a center of the input portion (11; 11'); an output portion (17) having a first output surface (13) concavely formed around a center of a top surface of the lens body (10; 10') and a second output surface (15; 15') convexly formed around the first output surface (13), wherein a second convex portion (14) is formed at a center of the first output surface (13); and a reflection portion (19; 19') formed on the bottom surface of the lens body (10; 10') and located around the input portion (11; 11') to reflect an incident light in the lens body (10; 10'). The first output surface (13) extends from a light axis of the diffusing lens (40) until a predetermined distance from the light axis and is formed into an elliptical shape with two focuses, and the second output surface (15; 15') extends from the predetermined distance to surround the first output surface (13) and is formed into a circular shape with a predetermined radius.
Inventors:
John Haun
Yang, Keun Youn
Yang, Keun Youn
Application Number:
JP2020509410A
Publication Date:
December 23, 2020
Filing Date:
May 08, 2018
Export Citation:
Assignee:
J-TEK CO., LTD.
International Classes:
G02B17/08; F21S2/00; F21V5/00; F21V5/04; G02B3/00; G02B5/02; G02B5/10; G02B13/00
Domestic Patent References:
| JP2014021218A | ||||
| JP2012099409A |
Foreign References:
| KR1020160072168B1 | ||||
| KR1020140095913B1 | ||||
| CN104566203A | ||||
| CN206133154U | ||||
| CN204477929U | ||||
| WO2012073398A1 | ||||
| EP3043199A1 | ||||
| US20110116272 |
Attorney, Agent or Firm:
Maeda/Suzuki International Patent Corporation