Invention Application
US20160116723A1 A LIGHT GUIDE FOR MODIFYING A LIGHT DISTRIBUTION PATTERN 有权
一种用于修改光分布图案的指南

  • 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
  • Application No.: US14891481
    Application Date: 2014-03-04
  • Publication No.: US20160116723A1
    Publication 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
A LIGHT GUIDE FOR MODIFYING A LIGHT DISTRIBUTION PATTERN
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.
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