Invention Application
- Patent Title: A LIGHT GUIDE FOR MODIFYING A LIGHT DISTRIBUTION PATTERN
- Patent Title (中): 一种用于修改光分布图案的指南
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Application No.: US14891481Application Date: 2014-03-04
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Publication No.: US20160116723A1Publication Date: 2016-04-28
- Inventor: Hannu HUKKANEN
- Applicant: LEDIL OY
- Priority: FI20135504 20130514
- International Application: PCT/FI2014/050157 WO 20140304
- Main IPC: G02B17/08
- IPC: G02B17/08 ; F21V7/22 ; F21V8/00 ; F21V5/04 ; F21V7/00

Abstract:
A light guide (201) including a transparent element is presented. The transparent element includes a first surface (203) for acting as a light-ingress surface and a second surface (204) for acting as a light-egress surface. The second surface includes elevations (205) for directing a part of the light into directions sideward with respect to a direction in which another and greater part of the light exits the transparent element through the second surface. Each elevation is shaped to provide total internal reflection for a light beam on a first point of the surface of the elevation and refract the reflected light beam on a second point of the surface of the elevation so as to direct the light beam sideward. The sideward directed light enables an observer, who sees the light guide from a small viewing angle, to easily see whether the light is on or off.
Public/Granted literature
- US09829689B2 Light guide for modifying a light distribution pattern Public/Granted day:2017-11-28
Information query
IPC分类:
G | 物理 |
G02 | 光学 |
G02B | 光学元件、系统或仪器 |
G02B17/00 | 有或无折射元件的具有反射面的系统 |
G02B17/08 | .折反射系统 |