Title:
OPTICAL ELEMENT AND LIGHT-EMITTING DEVICE
Document Type and Number:
WIPO Patent Application WO/2011/083779
Kind Code:
A1
Abstract:
Disclosed are an optical element and a light-emitting device both for making the illuminant of illuminating light more uniform and reducing the glare when a plurality of light sources such as LEDs are used as light sources. The light-emitting device (21) is provided with a light guide (1) which comprises a light guide section (1A) having a shape of a triangular prism. Of the three side surfaces of the light guide section (1A), a side surface is made to serve as an entrance surface (4) through which light enters, another side surface is made to serve as a total reflection surface (5) which totally reflects the light having entered, and the other side surface is made to serve as an exit surface (6) from which the totally reflected light is allowed to exit outside. On the entrance surface (4), provided is a first prism section (7) composed of a plurality of first triangular prisms (7A) having edge sections (12) the edge direction of which crosses the plane including the total reflection surface (5) and the plane including the exit surface (6). A plurality of light sources (22) for allowing light to enter through the entrance surface (4) are arranged in the direction in which the first triangular prisms (7A) are arranged.
More Like This:
| WO/2014/106357 | BACKLIGHT MODULE |
| JP6872167 | Lighting device |
| JP5061409 | Liquid crystal display device |
Inventors:
MOCHIZUKI KEIICHI (JP)
Application Number:
PCT/JP2011/050007
Publication Date:
July 14, 2011
Filing Date:
January 04, 2011
Export Citation:
Assignee:
NITTOH KOGAKU KK (JP)
KOIKE YASUHIRO (JP)
MOCHIZUKI KEIICHI (JP)
KOIKE YASUHIRO (JP)
MOCHIZUKI KEIICHI (JP)
International Classes:
F21V8/00; F21S2/00; G02B5/02; G02B5/04; F21Y101/02
Foreign References:
| JP2004319322A | 2004-11-11 | |||
| JP2002260427A | 2002-09-13 | |||
| JP2009277641A | 2009-11-26 | |||
| JP2007115451A | 2007-05-10 |
Attorney, Agent or Firm:
IAT WORLD PATENT LAW FIRM (JP)
Eye アット international patent business corporation (JP)
Eye アット international patent business corporation (JP)
Download PDF:
Claims: