Illuminating device

• US 8,960,977 B2
• Filed: 11/27/2012
• Issued: 02/24/2015
• Est. Priority Date: 08/10/2012
• Status: Active Grant

• Current Assignee: LG Innotek Company Limited (LG Corporation)
• Original Assignee: LG Innotek Company Limited (LG Corporation)
• Inventors: Yang, Hyun Duck, Kim, Chul Hong, Kim, Jin Hee, Park, Gwang Ho, Park, Moo Ryoung
• Primary Examiner(s): BRUCE, DAVID VERNON
• Application Number:
  US13/686,675
• Publication Number:
  US 20140043854A1
• Time in Patent Office: 819 Days
• Field of Search: 362/612, 362/617, 362/618, 362/619, 362/620, 362/487, 362/488, 362/501
• US Class Current: 362/488
• CPC Class Codes: F21S 43/14 Light emitting diodes [LED]
• CPC Class Codes: F21S 43/145 Surface emitters, e.g. organic light emitting diodes [OLED]
• CPC Class Codes: F21S 43/239 plate-shaped
• CPC Class Codes: F21S 43/245 emitting light from one or more of its major surfaces
• CPC Class Codes: F21S 43/249 with two or more light sources being coupled into the light guide
• CPC Class Codes: F21S 43/26 Refractors, transparent cover plates, light guides or filters not provided in groups F21S43/235 - F21S43/255
• CPC Class Codes: F21S 43/28135 Structures encapsulating the light source
• CPC Class Codes: F21S 43/40 characterised by the combination of reflectors and refractors
• CPC Class Codes: F21V 13/12 Combinations of only three kinds of elements
• CPC Class Codes: F21Y 2101/00 Point-like light sources
• CPC Class Codes: F21Y 2105/10 comprising a two-dimensional array of point-like light-generating elements
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: G02B 6/0001 specially adapted for lighting devices or systems lighting or signalling on vehicles using light guides B60Q1/00; lighting devices for vehicle dashboards B60Q3/10; lighting devices for vehicle interior using light guides B60Q3/62; lighting devices mounted on the vehicle rear part using light guides F21S43/235; measuring arrangements having light conducting pointers G01D13/265; illumination of liquid crystal displays G02F1/1336; illuminated signs G09F13/00
• CPC Class Codes: G02B 6/0021 for housing at least a part of the light source, e.g. by forming holes or recesses
• CPC Class Codes: G02B 6/0025 Diffusing sheet or layer; Prismatic sheet or layer
• CPC Class Codes: G02B 6/003 Lens or lenticular sheet or layer
• CPC Class Codes: G02B 6/0031 Reflecting element, sheet or layer
• CPC Class Codes: G02B 6/0036 2-D arrangement of prisms, protrusions, indentations or roughened surfaces
• CPC Class Codes: G02B 6/0068 Arrangements of plural sources, e.g. multi-colour light sources
• CPC Class Codes: G02B 6/0073 Light emitting diode [LED]
• CPC Class Codes: G02B 6/0083 : Details of electrical connections of light sources to drivers, circuit boards, or the like
• CPC Class Codes: H05K 1/00 : Printed circuits
• CPC Class Codes: H05K 1/0274 : Optical details, e.g. printed circuits comprising integral optical means H05K1/0269 takes precedence; coupling light guides with opto-electronic components G02B6/42
• CPC Class Codes: H05K 1/0393 : Flexible materials H05K1/038 takes precedence; specific organic compositions are classified in H05K1/0313 and subgroups
• CPC Class Codes: H05K 1/189 : characterised by the use of a flexible or folded printed circuit H05K3/326 takes precedence
• CPC Class Codes: H05K 2201/05 : Flexible printed circuits [FPCs]
• CPC Class Codes: H05K 2201/10106 : Light emitting diode [LED]
• CPC Class Codes: H05K 2201/2054 : Light-reflecting surface, e.g. conductors, substrates, coatings, dielectrics

Abstract

Disclosed is an illuminating device which comprises a light guiding unit comprising a protrusion optical pattern forming a gap with an adjacent layer, at least one light emitting unit passing through the light guiding unit, and a resin layer formed on the light guiding unit and the at least one light emitting unit, so it is possible to obtain an effect that the shapes of light change depending on the viewing angle when viewing the light source by producing various protrusion optical patterns, an effect that the whole thickness can be reduced, and an effect that the degree of design freedom can be enhanced when designing products thanks to an enhanced flexibility.

Claims

1. An illuminating device, comprising:

a light guiding unit comprising, a protrusion optical pattern forming a gap with an adjacent layer,

at least one light emitting unit passing through the light guiding unit, and

a resin layer formed on the light guiding unit and the at least one light emitting unit.

2. The illuminating device of claim 1, wherein the light guiding unit comprises any one of a prism sheet having a plurality of unit prism lens patterns, a micro lens array sheet and a lenticular lens sheet, or a combination thereof.

3. The illuminating device of claim 1, wherein the protrusion optical pattern is formed on the other surface coming into contact with the resin layer.

4. The illuminating device of claim 1, further comprising a printed circuit board (PCB) provided at the lower part of the light guiding unit.

5. The illuminating device of claim 4, further comprising a reflection member between the PCB and the light guiding unit.

6. The illuminating device of claim 5, wherein between the light guiding unit and the reflection member is formed an adhering pattern.

7. The illuminating device of claim 5, wherein on the reflection member is formed a reflection pattern.

8. The illuminating device of claim 7, wherein on the reflection pattern is formed a reflection ink containing one selected from the group consisting of TiO₂, CaCO₃, BaSO₄, Al₂O₃, Silicon and PS.

9. The illuminating device of claim 1, further comprising a diffusion member on an upper side of the resin layer.

10. The illuminating device of claim 9, where between the resin layer and the diffusion member is formed a first spacing part.

11. The illuminating device of claim 10, wherein the first spacing part has a thickness which is greater than zero up to 20 mm.

12. The illuminating device of claim 1, further comprising a first optical sheet formed on an upper surface of the resin layer and disperses an emitting light.

13. The illuminating device of claim 12, further comprising a second optical sheet formed on the first optical sheet.

14. The illuminating device of claim 13, further comprising an adhering layer formed between the first optical sheet and the second optical sheet.

15. The illuminating device of claim 14, wherein the adhering layer forms a second spacing part which spaces apart the first optical sheet and the second optical sheet.

16. The illuminating device of claim 15, wherein an optical pattern is formed on either an upper surface of the first optical sheet or a lower surface of the second optical sheet for the purpose of shielding or reflecting an emitting light.

17. The illuminating device of claim 16, wherein the optical pattern is formed in a double structure in which a diffusion pattern formed using a light shielding ink containing at least one selected from the group consisting of TiO₂, CaCO₃, BaSO₄ and Silicon and a light shielding pattern formed using a light shielding ink containing Al or a mixture of Al and TiO₂ form the double structure.

18. The illuminating device of claim 17, wherein the diffusion pattern is printed on either an upper surface of the light shielding pattern or a lower surface of it.

19. The illuminating device of claim 1, wherein the resin layer is formed of an ultraviolet ray thermosetting resin containing oligomer.

20. The illuminating device of claim 2, wherein the oligomer contains at least one selected from the group consisting of urethane acrylate, epoxy acrylate, polyester acrylate and acrylic acrylate.

21. The illuminating device of claim 20, wherein the resin layer further contains a plurality of beads each made from one selected from the group consisting of silicon, silica, glass bubble, PMMA, urethane, Zn, Zr, Al₂O₃ and acryl.

22. The illuminating device of claim 4, wherein the PCB is formed of a flexible PCB.