The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 10, 2020
Filed:
Jan. 18, 2019
Applicant:
Himax Technologies Limited, Tainan, TW;
Inventor:
Cheng-Hung Chi, Tainan, TW;
Assignee:
HIMAX TECHNOLOGIES LIMITED, Tainan, TW;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 27/09 (2006.01); F21Y 115/30 (2016.01); F21V 5/00 (2018.01); G02B 27/00 (2006.01);
U.S. Cl.
CPC ...
G02B 27/0944 (2013.01); F21V 5/007 (2013.01); F21Y 2115/30 (2016.08); G02B 27/0037 (2013.01);
Abstract
An illumination device including a light source array and a diffractive optical element (DOE) is provided. The light source array includes a plurality of point light sources arranged in an array. The diffractive optical element includes a plurality of diffractive areas respectively aligned with the point light sources. The diffractive areas respectively diffract lights from the point light sources to an illuminated object, so as to superimpose the lights to form a uniform bright area on the illuminated object.