Title:
発光ダイオード
Document Type and Number:
Japanese Patent JP5899301
Kind Code:
B2
Abstract:
A lens for a light emitting diode is formed with a material having a refractive index of n, and the lens includes a base, a first curved circumferential surface extending from the base, a curved center-edge surface extending from the first curved circumferential surface, and a curved centermost surface extending from the curved center-edge surface. The base includes a groove for receiving a light emitting chip therein. In the lens, a distance from a center of the base to a point of the curved center-edge surface is always shorter than the radius of curvature for the point of the curved center-edge surface. The curved centermost surface has a concave shape with respect to the base. In addition, when an obtuse angle formed between a main axis of the lens and a tangent line of a point of the curved centermost surface is A1, and an acute angle formed between a straight line linking the center of the base to the point of the curved centermost surface and the main axis of the lens is A2, the lens satisfies the equation: A1+A2 < 90+sin -1 (1/n).
Inventors:
Yun Yong
Satoshi Kinki
Lee Bell Rui
Song Chun Ho
Park Seiki
Lee Sokichi
Ginger bowl
Satoshi Kinki
Lee Bell Rui
Song Chun Ho
Park Seiki
Lee Sokichi
Ginger bowl
Application Number:
JP2014254162A
Publication Date:
April 06, 2016
Filing Date:
December 16, 2014
Export Citation:
Assignee:
Samsung Display Co.,Ltd.
International Classes:
H01L33/58; F21S2/00; F21V5/00; F21V5/04; G02B13/00; G02B13/18
Domestic Patent References:
| JP2004179048A | ||||
| JP7027011U |
Attorney, Agent or Firm:
Kyosei International Patent Office