LIGHT EMITTING MODULE HAVING LENS

• US 20150036353A1
• Filed: 02/08/2013
• Published: 02/05/2015
• Est. Priority Date: 02/16/2012
• Status: Active Grant

• Current Assignee: Seoul Semiconductor Co., Ltd.
• Original Assignee: Seoul Semiconductor Co., Ltd.
• Inventors: Kim, Eun Ju, Ye, Kyung Hee, Yang, Young Eun
• Granted Patent: US 9,810,382 B2
• Time in Patent Office: Days
• US Class Current: 362/311.02
• CPC Class Codes: F21K 9/60 Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction
• CPC Class Codes: F21V 19/002 the fastening means engaging the encapsulation or the packaging of the semiconductor device
• CPC Class Codes: F21W 2131/103 of streets or roads
• CPC Class Codes: H01L 33/58 Optical field-shaping elements

Abstract

A light emitting module having a lens is disclosed. The light emitting module includes: a substrate having recesses; light emitting elements mounted within the recesses of the substrate; and a lens which is coupled with the substrate and diffuses the light emitted from the light emitting elements. The light emitting module can have a slim structure by mounting the light emitting elements within the recesses formed in the substrate.

Claims

1. A light-emitting module, comprising:

a substrate comprising a recess;

a light-emitting element disposed in the recess; and

a lens disposed on the substrate and covering the light-emitting element, the lens configured to diffuse light emitted from the light-emitting element.

2. The light-emitting module of claim 1, wherein the light-emitting element comprises a light-emitting diode chip or a chip-type light-emitting diode package.

3. The light-emitting module of claim 2, wherein the light-emitting element further comprises a phosphor layer conformally coated on the light-emitting diode chip.

4. The light-emitting module of claim 2, wherein:

the substrate comprises a protrusion extending from an upper surface thereof;

the lens comprises a groove, the protrusion being disposed in the groove and connecting the lens and the substrate.

5. The light-emitting module of claim 2, further comprising:

a dam part disposed on the substrate,

wherein the lens comprises a groove, the dam part being disposed in the groove and connecting the lens and the dam part.

6. The light-emitting module of claim 5, wherein the dam part comprises a silicon resin or an optical sheet.

7. The light-emitting module of claim 2, further comprising

an optical sheet disposed on the substrate and comprising an opening exposing the light-emitting element,

wherein the lens is disposed in the opening and contacts the substrate in the opening.

8. The light-emitting module of claim 2, wherein a side surface of the lens is fitted contacts an inner wall of the recess.

9. The light-emitting module of claim 2, wherein:

the recess comprises a first portion and a second portion encompassing the first recess;

the light emitting element is disposed in the first recess; and

the lens is disposed in the second recess.

10. The light-emitting module of claim 9, further comprising:

a wavelength conversion material covering the light-emitting element.

11. The light-emitting module of claim 10, further comprising:

a transparent resin disposed between the wavelength conversion material and the lens, the transparent resin covering the wavelength conversion material.

12. The light-emitting module of claim 1, wherein the lens comprises:

a light incident surface on which light emitted from the light emitting element is incident; and

a light emitting surface through which the incident light is emitted.

13. The light-emitting module of claim 12, wherein the light incident surface is an inner surface of a concave part of a lower surface of the lens.

14. The light-emitting module of claim 13, wherein:

the concave part comprises a first portion and a second co portion disposed at an inlet side of the first portion; and

the second portion encompasses the first portion.

15. The light-emitting module of claim 1, further comprising a dam part, protrusion, or second recess disposed on the substrate,

wherein the lens comprises a groove, the dam part, protrusion, or second recess being disposed in the groove and connecting the lens and the dam part, protrusion, or second recess.

16. The light-emitting module of claim 15, wherein:

the lens comprises;

a light incident surface on which light emitted from the light emitting element is incident; and

a light emitting surface through which the incident light is emitted;

the light incident surface is an inner surface of a concave part of a lower surface of the lens;

the concave part comprises a first portion and a second portion disposed at an inlet side of the first portion; and

the second portion encompasses the first portion.

17. The light-emitting module of claim 16, wherein the height of the second portion is less than the height of the dam part, the protrusion, or the second recess.

18. The light-emitting module of claim 16, wherein:

half of the width of the inlet of the first portion is represented by r1;

half of the width of the second portion is represented by r2;

a distance from a central axis of the lens to the dam part, protrusion, or second recess is represented by D;

a height of the second portion is represented by h1;

a height of the dam part, protrusion, or second recess is represented by h2;

tan(Θ

1)=h1/r1, tan(Θ

2)=h1/r2, tan(Θ

3)=h2/D; and

Θ

1>

Θ

3 and Θ

2<

Θ

3.