Invention Grant
- Patent Title: Lighting device
- Patent Title (中): 照明设备
-
Application No.: US13869445Application Date: 2013-04-24
-
Publication No.: US08764223B2Publication Date: 2014-07-01
- Inventor: Ayako Tsukitani , Takashi Saito , Akira Takashima , Kouichi Wada , Yoshinori Karasawa , Toshihide Mori , Hiroshi Hamano , Kensuke Yamazoe
- Applicant: Panasonic Corporation
- Applicant Address: JP Osaka
- Assignee: Panasonic Corporation
- Current Assignee: Panasonic Corporation
- Current Assignee Address: JP Osaka
- Agency: Greenblum & Bernstein, P.L.C.
- Priority: JP2012-109390 20120511
- Main IPC: F21V21/002
- IPC: F21V21/002 ; F21V9/00 ; F21S4/00 ; F21S8/10 ; H01L33/48 ; H01L33/58

Abstract:
A lighting device includes first and second light emission units. The first light emission unit emits light having a relatively low color temperature and a high feeling of contrast index. The second light emission unit emits light having a relatively high S/P ratio, which is the ratio of scotopic luminance to photopic luminance. The first light emission unit illuminates a region located at a vertical upper side of a region illuminated by the second light emission unit.
Public/Granted literature
- US20130299851A1 LIGHTING DEVICE Public/Granted day:2013-11-14
Information query