Zhaohui H Yang

US Patent:

20120193607, Aug 2, 2012

Filed:

Oct 12, 2010

Appl. No.:

13/499884

Inventors:

Nicole J. Wagner - Monrovia CA, US
Craig R. Schardt - Woodbury MN, US
Zhaohui Yang - North Oaks MN, US

International Classification:

H01L 33/06
H01L 33/60
H01L 33/08

US Classification:

257 13, 257 88, 438 27, 257E33008, 257E33012, 257E33073

Abstract:

Wherein the light source comprising: a monolithic emissive semiconductor device; and an array of lenslets, the lenslets being optically and mechanically coupled to the monolithic emissive semiconductor device; wherein the monolithic emissive semiconductor device comprises an array of localized light emission regions, each region corresponding to a given lenslet; wherein the lenslets have an apparent center of curvature (C), an apparent focal point (f), a radius of curvature (R) and a lenslet base diameter (D), the base diameter being the width of the lenslet at the intersection with the monolithic emissive semiconductor device; wherein the distance along the lenslet optic axis between the Cand the fare normalized, such that Cis located at distance 0 and fis located at point 1; wherein each localized light emission region is located at a point that is greater than 0, and less than Formula (I); and wherein each light emission region has a diameter, the emission region diameter measuring one-third or less of a corresponding lenslet base diameter.

US Patent:

20150330600, Nov 19, 2015

Filed:

May 13, 2015

Appl. No.:

14/711425

Inventors:

- St. Paul MN, US
Todd E. Bracher - Brooklyn NY, US
Gilles J.B. Benoit - Minneapolis MN, US
Zhaohui Yang - North Oaks MN, US

International Classification:

F21V 7/08
F21S 8/00

Abstract:

A reflector and a light fixture that includes the reflector are provided, where the reflector has a reflecting surface having a shape which closely approximates a determined surface which is series of ellipsoidal section segments, wherein each ellipsoidal section segment has a first focus A and a second focus B, wherein first focus A is the same point for each ellipsoidal section segment, and wherein, for successive ellipsoidal section segments, focus B is at a successive location along a line. In some embodiments, the light fixture additionally comprises a light source, typically located at focus A. The present disclosure enables the projection of a visually striking, linearly extended pattern of light on a wall from a fixture mounted on that same wall, where the fixture may furthermore have very little depth, i.e., orthogonal extension outward from that wall.