Title:
LIGHT OUTCOUPLING STRUCTURE FOR LIGHTING DEVICE
Document Type and Number:
Japanese Patent JP2014139673
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a light outcoupling structure for lightguides or other lighting devices which is improved in the directivity and the uniformity of outcoupled light.SOLUTION: A diffractive light outcoupling unit for forming a part of a directive light outcoupling system of a lighting device comprising a plurality of diffractive light outcoupling units comprises: a carrier element for accommodating a diffractive surface relief pattern; and the diffractive surface relief pattern comprising a plurality of consecutive diffractive surface relief forms defined on a surface area of the carrier element. The form period is preferably about 10 microns or less. The forms are arranged to couple light incident on the diffractive surface relief pattern to outside the carrier element via interaction involving at least two surface relief forms of the plurality of surface relief forms of the diffractive surface relief pattern so as to enhance the directivity of the coupled light.
Inventors:
KARI RINKO
Application Number:
JP2014022094A
Publication Date:
July 31, 2014
Filing Date:
February 07, 2014
Export Citation:
Assignee:
MODINES LTD OY
International Classes:
G02B5/18; G02B6/00
Domestic Patent References:
| JP2006113271A | 2006-04-27 | |||
| JP2005353599A | 2005-12-22 | |||
| JP2006113271A | 2006-04-27 | |||
| JP2001243822A | 2001-09-07 | |||
| JP2005353599A | 2005-12-22 | |||
| JP2003500706A | 2003-01-07 |
Foreign References:
| US20050213348A1 | 2005-09-29 |
Attorney, Agent or Firm:
Ryoichi Takaoka