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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.:

US 10684428 B1

PDFFull Text
Date of Patent:
Jun. 16, 2020

Filed:

Feb. 26, 2016

Front light unit and image display device

Applicant:

Lg Innotek Co., Ltd., Seoul, KR;

Inventors:

Sang Hun Lee, Seoul, KR;

Min Kim, Seoul, KR;

Tae Kyung Kim, Seoul, KR;

Jung In Jang, Seoul, KR;

Assignee:

LG INNOTEK CO., LTD., Seoul, KR;

Attorney:

Saliwanchik, Lloyd & Eisenschenk

Primary Examiner:

Mustak Choudhury

Int. Cl.
CPC ...
G02B 5/32 (2006.01); G02B 6/42 (2006.01); F21V 8/00 (2006.01); G02B 27/01 (2006.01); G02B 6/27 (2006.01); G02B 6/28 (2006.01); G02B 6/34 (2006.01); G02F 1/1362 (2006.01); G02F 1/13357 (2006.01);
U.S. Cl.
CPC ...
G02B 6/4204 (2013.01); G02B 5/32 (2013.01); G02B 6/005 (2013.01); G02B 6/0023 (2013.01); G02B 6/0031 (2013.01); G02B 6/27 (2013.01); G02B 6/2817 (2013.01); G02B 6/34 (2013.01); G02B 27/01 (2013.01); G02B 27/0103 (2013.01); G02B 27/0172 (2013.01); G02B 2027/015 (2013.01); G02B 2027/0118 (2013.01); G02B 2027/0174 (2013.01); G02F 1/133615 (2013.01); G02F 2001/136281 (2013.01);
Abstract

A front light unit of an embodiment comprises: a light source unit for an image display device; a light guide unit for guiding light incident from the light source unit and outputting the guided light to a display unit; and a holographic optical element unit being opposite to the display unit and disposed on the light guide unit. Therefore, the present invention can adjust the direction of light output from the light source unit and increase the quantity of light transferred to the display unit, using a pattern formed in the holographical optical element unit, thereby improving the efficiency of light supplied from the light source unit and reducing the sizes of the light unit and the display device including the same.

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