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:
May. 19, 2020
Filed:
Jan. 24, 2017
Applicant:
Samsung Electronics Co., Ltd., Suwon-si, KR;
Inventors:
Assignee:
SAMSUNG ELECTRONICS CO., LTD., Suwon-si, KR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F21V 8/00 (2006.01); G03H 1/22 (2006.01); G02B 6/34 (2006.01); G02B 30/27 (2020.01);
U.S. Cl.
CPC ...
G02B 6/005 (2013.01); G02B 6/0055 (2013.01); G02B 6/0068 (2013.01); G02B 6/34 (2013.01); G02B 30/27 (2020.01); G03H 1/2286 (2013.01); G03H 2223/16 (2013.01);
Abstract
A coherent backlight unit and a 3D image display device including the coherent backlight unit are provided. The coherent backlight unit includes a light source, a light guide plate, a first diffraction grating, a second diffraction grating, and a reflective optical element. The light source irradiates a coherent light and the reflective optical element reflects the coherent light that is propagating toward one of the side surfaces from the inner side of the light guide plate toward the inner side of the light guide plate.