Title:
Lighting method and light emitting device
Document Type and Number:
Japanese Patent JP6359718
Kind Code:
B2
Abstract:
An object of the present invention is to provide an illumination method with which improvements in the appearance of colors perceived by a human at an illuminance of 5 lx to 150 lx are achieved in terms of visibility, the color appearance of chromatic colors perceived by a human, and a feeling of brightness, a color appearance or an object appearance as perceived by a person, will be as natural, vivid, highly visible, and comfortable as though perceived outdoors in a high-illuminance environment, regardless of scores of various color rendition metric, as well as a light-emitting device for implementing the illumination method. Light emitted from the light-emitting device illuminates an object such that light measured at a position of the object satisfies specific requirements. A feature of the light-emitting device is that light emitted by the light-emitting device in a main radiant direction satisfies specific requirements.
Inventors:
Hideyoshi Horie
Application Number:
JP2017075721A
Publication Date:
July 18, 2018
Filing Date:
April 06, 2017
Export Citation:
Assignee:
Citizen Electronics Co., Ltd.
International Classes:
F21V9/30; C09K11/59; C09K11/62; C09K11/64; C09K11/66; C09K11/67; C09K11/73; G02B5/20; H01K5/00; H01L33/50
Domestic Patent References:
| JP2012506615A | ||||
| JP2012039120A | ||||
| JP2005158795A | ||||
| JP2008521210A |
Foreign References:
| WO2010126065A1 | ||||
| WO2011024818A1 | ||||
| US20100096998 |
Attorney, Agent or Firm:
Shinichi Sanuki
Takeshi Niwa
Toshiaki Shimoda
Yu Anzai
Takeshi Niwa
Toshiaki Shimoda
Yu Anzai