Title:
ILLUMINATION UNIT
Document Type and Number:
WIPO Patent Application WO/2018/225376
Kind Code:
A1
Abstract:
Provided is a small-sized illumination unit suitable for providing illumination such as, by turning on or off specific light sources, not illuminating a certain area, or forming a character or shape. An illumination unit comprises a plurality of light sources and an optical system for modulating output light from the light sources. The optical system includes a lens unit comprising a plurality of lenses, and a light-distribution control multiplexing element disposed between the light sources and the lens unit. The light-distribution control multiplexing element is provided with: a plurality of light guide portions which have a tapered shape expanding from the light source side toward the lens unit side, and which guide the output light that has been output from the light sources; and a flat plate portion disposed on the output side of the light guide portions. With respect to the area of an input surface of the light guide portions into which the output light from the light sources is input, the area of an output surface for outputting the light input to the light guide portions toward the flat plate portion is set to be greater by a factor of not less than 1.2 and not more than 2.5.
Inventors:
NAKAMURA KENTAROU (JP)
Application Number:
PCT/JP2018/015217
Publication Date:
December 13, 2018
Filing Date:
April 11, 2018
Export Citation:
Assignee:
KONICA MINOLTA INC (JP)
International Classes:
F21V8/00; F21S2/00; F21V5/04; G02B13/18; G03B21/14; H01L33/58; F21Y103/10; F21Y105/10; F21Y115/10
Domestic Patent References:
| WO2014038182A1 | 2014-03-13 |
Foreign References:
| JP2014126604A | 2014-07-07 | |||
| JP2007288169A | 2007-11-01 | |||
| JP2007305340A | 2007-11-22 | |||
| JP2003531458A | 2003-10-21 |
Attorney, Agent or Firm:
TAMURA Keijiro et al. (JP)
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