Light-emitting apparatus

Patent metadata

Field	Value
Publication number	US-9869454-B2
Application number	US-201514929291-A
Country	US
Kind code	B2
Filing date	Oct 31, 2015
Priority date	Nov 11, 2014
Publication date	Jan 16, 2018
Grant date	Jan 16, 2018

Abstract

Embodiments provide a light-emitting apparatus including at least one light source, a wavelength converter configured to convert a wavelength of light emitted from the light source, a reflector configured to reflect the light having the wavelength converted in the wavelength converter and light having an unconverted wavelength, and a refractive member disposed in a light passage space between the reflector and the wavelength converter, the refractive member being configured to emit the reflected light.

First claim

What is claimed is:

1. A light-emitting apparatus comprising:
at least one light source;
a wavelength converter configured to convert a wavelength of light emitted from the light source;
a reflector configured to reflect the light having the wavelength converted in the wavelength converter and light having an unconverted wavelength;
a refractive member disposed in a light passage space between the reflector and the wavelength converter, the refractive member being configured to emit the reflected light; and
a base substrate disposed to be opposite to the reflector,
wherein the refractive member includes:
a rounded first surface disposed to face the reflector;
a second surface having a first portion disposed to face the wavelength converter, and a second portion excluding the first portion; and
a third surface for emission of the reflected light,
wherein the base substrate includes first and second areas adjacent to each other,
wherein the first area corresponds to an area excluding the second area, or the first area corresponds to an area facing the second portion of the second surface of the refractive member, and
wherein the second area corresponds to an area, in which the wavelength converter is disposed.

2. The apparatus according to claim 1 , wherein the base substrate is disposed to be opposite to the reflector with the refractive member interposed therebetween.

3. The apparatus according to claim 1 , wherein the second area of the base substrate includes a first through-hole for passage of the light emitted from the light source, and the wavelength converter is located in the first through-hole.

4. The apparatus according to claim 1 , wherein the reflector includes a second through-hole for passage of the light emitted from the light source.

5. The apparatus according to claim 3 , wherein the first through-hole is located closer to the first surface of the refractive member than the third surface.

6. The apparatus according to claim 4 , wherein the reflector has one end coming into contact with the third surface of the refractive member and the other end coming into contact with the base substrate, and a first distance from the second through-hole to the one end of the reflector is greater than a second distance from the second through-hole to the other end of the reflector.

7. The apparatus according to claim 1 , further comprising a first reflective layer disposed between at least a part of the second portion of the refractive member and the first area of the base substrate.

8. The apparatus according to claim 4 , wherein the second area of the base substrate includes a recess for arrangement of the wavelength converter.

9. The apparatus according to claim 8 , further comprising a second reflective layer disposed in the recess between the wavelength converter and the base substrate.

10. The apparatus according to claim 4 , wherein the wavelength converter is disposed on the second area of the base substrate so as to be rotatable to face the second through-hole.

11. The apparatus according to claim 1 , wherein at least one of the second portion of the refractive member and the first area of the base substrate has a pattern.

12. The apparatus according to claim 1 , wherein the reflector and the refractive member are integrated with each other.

13. The apparatus according to claim 1 , further comprising an anti-reflective film disposed on the third surface of the refractive member.

14. The apparatus according to claim 1 , wherein the reflector includes a metal layer coated on the first surface of the refractive member.

15. The apparatus according to claim 1 , further comprising a first adhesive part disposed between the first portion of the second surface of the refractive member and the wavelength converter.

16. The apparatus according to claim 1 , further comprising a second adhesive part disposed between the second portion of the second surface of the refractive member and the first area of the base substrate.

17. The apparatus according to claim 1 ,
wherein the at least one light source includes, a plurality of light sources, and
wherein the light-emitting apparatus further comprises a circuit board for mounting of the light sources.

18. The apparatus according to claim 17 , further comprising a radiator attached to a rear surface of the circuit board or a rear surface of the base substrate.

19. The apparatus according to claim 17 , further comprising:
at least one lens unit configured to focus light emitted from the plurality of light sources and to emit the focused light through the first or second through-hole; and
a mirroring unit arranged between the at least one lens unit and the first or second through-hole, the mirroring unit being configured to reflect the focused light from the at least one lens unit and to provide the reflected light into the first or second through-hole.

20. The apparatus according to claim 19 ,
wherein the at least one lens unit comprises a first sub lens and a second sub lens,
wherein the first sub, lens is arranged between the second sub lens and the first or second through-hole,
wherein a number of the second sub lens is equal to a number of the plurality of light sources, and
wherein each of the second sub lens is arranged between each of the plurality of light sources and the first sub lens.

Assignees

• Lg Innotek Co Ltd

Inventors

• Kim Ki Cheol
• Son Chang Gyun
• Park Kang Yeol

Classifications

• F21V5/04 Primary

  of lens shape · CPC title

• F21K9/64

  using wavelength conversion means distinct or spaced from the light-generating element, e.g. a remote phosphor layer · CPC title

• F21V13/14

  the elements being filters or photoluminescent elements, reflectors and refractors · CPC title

• F21V7/0008

  providing for indirect lighting · CPC title

• F21V17/101

  permanently, e.g. welding, gluing or riveting · CPC title