公开(公告)号：US20190003684A1

公开(公告)日：2019-01-03

申请号：US15744230

申请日：2017-09-13

Applicant: LEDIL- OY

Inventor： Hannu HUKKANEN ,  Kimmo HARJUNPÄÄ

IPC: F21V13/04 ,  F21V5/04 ,  F21V7/04 ,  G02B19/00

CPC classification number: F21V13/04 ,  B29D11/0048 ,  F21V5/04 ,  F21V5/08 ,  F21V7/0091 ,  F21V7/04 ,  F21W2131/103 ,  F21Y2115/10 ,  G02B6/0001 ,  G02B19/0028 ,  G02B19/0061

Abstract: An optical device for modifying a light distribution pattern of a light source is presented. The light source radiates first light beams to a first geometric quarter-space and second light beams to a second geometric quarter-space, where the first and second quarter-spaces are defined by mutually perpendicular geometric planes one of which constitutes a boundary between the first and second geometric quarter-spaces. The optical device may include a lens-section for modifying a light distribution pattern of the first light beams and a reflector surface for reflecting at least a part of the second light beams from the second geometric quarter-space to the first geometric quarter-space. The reflector surface is shaped to resemble a wedge that points towards the first geometric quarter-space so as to provide total internal reflection and to direct the reflected second light beams to sideward directions.

公开(公告)号：US20210071843A1

公开(公告)日：2021-03-11

申请号：US17011531

申请日：2020-09-03

Applicant: Ledil Oy

Inventor： Joni PALM ,  Kimmo HARJUNPÄÄ

IPC: F21V5/04 ,  F21K9/69 ,  B29D11/00 ,  G02B3/08

Abstract: An optical device (201) comprises a lens (205) having a light ingress surface (206) and a light egress surface (207). The light ingress surface comprises one or more V-shaped projections on a center area (208) of the light ingress surface and the light ingress surface is free from corners on areas (209) outside the center area. Each V-shaped projection is shaped so that a surface penetration takes place when a light beam arrives at a side surface of the V-shaped projection and a total internal reflection takes place when the light beam arrives at the other side surface of the V-shaped projection. Thus, obliquely arriving light beams emitted by edge areas of a light emitting surface (213) of a light source (202) are mixed better with light beams emitted by other areas of the light emitting surface. Therefore, undesired color variations within a light distribution pattern are reduced.