Stereoscopic lighting device and vehicle lighting device using the same

Patent metadata

Field	Value
Publication number	US-9921411-B2
Application number	US-201514612844-A
Country	US
Kind code	B2
Filing date	Feb 3, 2015
Priority date	Feb 5, 2014
Publication date	Mar 20, 2018
Grant date	Mar 20, 2018

Abstract

Provided are a stereoscopic display device capable of implementing a deep three-dimensional effect via a light source module having a thin thickness and a vehicle lighting device using the stereoscopic display device, the stereoscopic lighting device, including: a base substrate; a light source on the base substrate; a reflective layer disposed on one surface of the base substrate; a light guide layer burying the light source and the reflective layer; and a first half mirror layer disposed on the light guide layer.

First claim

What is claimed is:

1. A lighting device, comprising:
a base substrate;
a light source on the base substrate;
a reflective layer provided on one surface of the base substrate;
a light guide layer burying the light source and the reflective layer, the light guide layer including a first light guide layer provided on the reflective layer and a second light guide layer provided on the first light guide layer;
a first half mirror layer provided on the second light guide layer; and
a second half mirror layer provided between the first light guide layer and the second light guide layer,
wherein light transmittance of the second half mirror layer is higher than that of the first half mirror layer, and reflectance of the second half mirror layer is lower than that of the first half mirror layer,
wherein the second half mirror layer is thinner than the first half mirror layer,
and wherein the light source is formed to physically penetrate through the first light guide layer and the second half mirror layer.

2. The lighting device of claim 1 , wherein a first light beam emitted from the light source becomes a second light beam reflected by the second half mirror layer and a third light beam transmitted to the second half mirror layer, and wherein the third light beam becomes a fourth light beam reflected by the first half mirror layer and a fifth light beam transmitted to the first half mirror layer.

3. The lighting device of claim 2 , wherein the light source emits light toward a side surface of the light guide layer.

4. The lighting device of claim 1 , wherein a distance (H 2 ) between the reflective layer and the first half mirror layer is more than ½ of a thickness (H 1 ) of the stereoscopic lighting device and wherein the distance (H 2 ) between the reflective layer and the first half mirror layer is in the range of 2˜3 mm.

5. The lighting device of claim 1 , wherein a refractive index of the first light guide layer is identical to that of the second light guide layer.

6. The lighting device of claim 1 , further comprising a reflective pattern between the reflective layer and the light guide layer, wherein the reflective pattern is arranged on the reflective layer to be adjacent to a light emitting surface of the light source, and
wherein the reflective pattern is integrally provided with the reflective layer.

7. The lighting device of claim 1 , further comprising an outer lens on the first half mirror layer.

8. The lighting device of claim 7 , wherein the outer lens include an acryl film.

9. The lighting device of claim 1 , wherein the light guide layer is a resin layer closely attached to one surface of the reflective layer.

10. The lighting device of claim 1 , wherein the light guide layer contains a UV curing resin including an oligomer closely attached to one surface of the reflective layer.

11. The lighting device of claim 10 , wherein the oligomer includes urethane acrylate, epoxy acrylate, polyester acrylate, acrylic acrylate or a combination thereof.

12. The lighting device of claim 11 , further comprising beads provided in the inside of the light guide layer.

13. A vehicle lighting device, comprising:
the lighting device of claim 1 ; and
an instrument that supports the lighting device.

Assignees

• Lg Innotek Co Ltd

Inventors

• Lee Byoung Eon
• Yang Hyun Duck

Classifications

• F21S43/40

  characterised by the combination of reflectors and refractors · CPC title

• G02B6/0021

  for housing at least a part of the light source, e.g. by forming holes or recesses · CPC title

• G02B6/0073

  Light emitting diode [LED] · CPC title

• G02B6/0055

  Reflecting element, sheet or layer · CPC title

• F21V7/22

  characterised by materials, surface treatments or coatings, e.g. dichroic reflectors · CPC title