Optical member, lighting device and vehicle lamp having same

Patent metadata

Field	Value
Publication number	US-12553587-B2
Application number	US-202218681177-A
Country	US
Kind code	B2
Filing date	Aug 18, 2022
Priority date	Aug 19, 2021
Publication date	Feb 17, 2026
Grant date	Feb 17, 2026

Abstract

The lighting device disclosed at an embodiment of the invention comprises a substrate; a light source disposed on the substrate; a resin layer disposed on the substrate; and an optical member disposed on the resin layer, wherein the optical member includes a base layer, a pattern layer disposed on the base layer, and a reflective layer disposed on the pattern layer, and a pattern of the pattern layer includes a first surface and a second surface having a predetermined angle with respect to the first surface, the reflective layer is disposed on the first surface, and a difference between a intensity of light emitted to an outside through the first surface and the second surface may be 5 times or more.

First claim

The invention claimed is:

1 . A lighting device comprising:
a substrate; a plurality of light sources disposed on the substrate; a resin layer disposed on the substrate and sealing plurality of light sources; and an optical member disposed on the resin layer, wherein the optical member includes a base layer, a pattern layer disposed on the base layer, and a reflective layer disposed on the pattern layer, wherein the pattern layer includes a plurality of patterns having a first surface and a second surface extending from the first surface, wherein the reflective layer is disposed on the first surface, wherein the plurality of patterns includes a region where an angle between the first surface and the second surface is different, wherein the optical member includes at least one of phosphor or ink particles, wherein the region of the plurality of patterns includes a first region in which the angle formed by the first surface and the second surface is a first angle, a second region in which the angle formed by the first surface and the second surface is a second angle, and a third region having a third angle between the first angle and the second angle, wherein the first region is a region with a highest luminous intensity of front light distribution, wherein the second region is a region with a highest luminous intensity of side light distribution, and wherein the third region is disposed between the first region and the second region, and has a highest light distribution in a direction between a front and a side.

2 . The lighting device of claim 1 ,
wherein light emitted through the second surface is red light.

3 . The lighting device of claim 1 ,
wherein the first angle is greater than the second angle.

4 . The lighting device of claim 1 ,
wherein the plurality of patterns includes a region where a length of a short axis of the first surface is different from that of a short axis of the second surface.

5 . A lighting device comprising:
a substrate; a light source disposed on the substrate; a resin layer disposed on the substrate; and an optical member disposed on the resin layer, wherein the optical member includes a base layer, a pattern layer disposed on the base layer, and a reflective layer disposed on the pattern layer, wherein the pattern layer includes a plurality of patterns having a first surface and a second surface extending from the first surface, wherein the reflective layer is disposed on the first surface, and wherein a shape of light emitted through the pattern layer is different from a first shape viewed from a first direction and a second shape viewed from a second direction.

6 . The lighting device of claim 5 ,
wherein the first direction is a direction perpendicular to a lower surface of the base layer, and the second direction is 45 degrees on one side based on the first direction, wherein a luminous intensity of a third shape viewed from a third direction forming 45 degrees on another side with respect to the first direction is different from a luminous intensity of the first shape, wherein the first shape has the same outer image of 80% or more as the third shape.

7 . The lighting device of claim 5 ,
wherein the first direction is a direction perpendicular to a lower surface of the base layer, wherein the second direction is 45 degrees on one side based on the first direction, wherein a third direction is 45 degrees to another side based on the first direction, wherein the second direction is a direction facing the reflective layer, wherein the third direction is a direction facing the second surface, wherein the second shape includes a line shape equal to a width of an exit side of the resin layer.

8 . The lighting device of claim 5 ,
wherein the reflective layer is made of a metal material, and the second surface is made of a light transmitting material.

9 . The lighting device of claim 5 ,
wherein an exit surface of the resin layer facing the optical member is flat or curved, wherein each pattern of the pattern layer has a different height of a pattern adjacent to one side of the optical member and a height of a pattern adjacent to the other side.

10 . The lighting device of claim 5 ,
wherein the optical member includes at least one of a phosphor or ink particles.

11 . The lighting device of claim 5 ,
wherein the optical member includes at least one of a red phosphor or red ink particles.

12 . The lighting device of claim 11 ,
wherein light emitted through the second surface of the pattern layer is red.

13 . The lighting device of claim 1 , comprising:
a diffusion member disposed between the resin layer and the optical member; and a light blocking portion disposed between the diffusion member and the resin layer and overlapping the plurality of light sources in a vertical direction, wherein the diffusion member includes at least one of a diffusing agent, an ink particle, or a phosphor.

Assignees

• Lg Innotek Co Ltd

Inventors

• Lim Eay Jin

Classifications

• G02B6/0038

  Linear indentations or grooves, e.g. arc-shaped grooves or meandering grooves, extending over the full length or width of the light guide · CPC title

• G02B6/0036

  2-D arrangement of prisms, protrusions, indentations or roughened surfaces · CPC title

• F21S43/37

  Attachment thereof · CPC title

• F21S43/195

  Details of lamp holders, terminals or connectors · CPC title

• F21S43/145

  Surface emitters, e.g. organic light emitting diodes [OLED] · CPC title