DIFFRACTION LIGHT GUIDE PLATE AND DISPLAY DEVICE COMPRISING SAME

Title:

DIFFRACTION LIGHT GUIDE PLATE AND DISPLAY DEVICE COMPRISING SAME

Document Type and Number:

WIPO Patent Application WO/2019/139440

Kind Code:

A1

Abstract:

An embodiment according to one aspect of the present invention provides a diffraction light guide plate comprising: a light guide part for guiding light; an input diffractive optical element for receiving light from a light source and diffracting the received light so that the received light may be guided on the light guide part; an intermediate diffractive optical element configured to receive the light diffracted from the input diffractive optical element so that the received light may be one-dimensionally expanded by diffraction; and an output diffractive optical element configured to receive the light expanded from the intermediate diffractive optical element so that the received light is output from the light guide part by diffraction, wherein the intermediate diffractive optical element and the output diffractive optical element are separately arranged in areas separated from each other on the light guide part along the horizontal direction, respectively, and wherein the intermediate diffractive optical element includes a main intermediate diffractive optical element and an auxiliary intermediate diffractive optical element which are arranged apart from each other on the light guide part in the longitudinal direction.

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Inventors:

PARK JEONG HO (KR)
PARK SEONG MIN (KR)
HAN SANG CHOLL (KR)
SHIN BU GON (KR)

Application Number:

PCT/KR2019/000548

Publication Date:

July 18, 2019

Filing Date:

January 14, 2019

Export Citation:

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Assignee:

LG CHEMICAL LTD (KR)

International Classes:

G02B27/42; F21V8/00; G02B27/01

Foreign References:

KR20160101104A	2016-08-24
US20100214659A1	2010-08-26
KR20150122341A	2015-11-02
JP2008523435A	2008-07-03
JP2007219106A	2007-08-30

Other References: