Wavelength converting module and semiconductor light-emitting apparatus using the same

Patent metadata

Field	Value
Publication number	US-9869927-B2
Application number	US-201615163507-A
Country	US
Kind code	B2
Filing date	May 24, 2016
Priority date	May 25, 2015
Publication date	Jan 16, 2018
Grant date	Jan 16, 2018

Abstract

A wavelength converting module and a semiconductor light-emitting apparatus using the wavelength converting module can emit various color lights. The light-emitting apparatus can include a semiconductor light source emitting an exciting light and an optical reflector, which reflects the exciting light toward the wavelength converting module. The wavelength converting module can include a base board and a cavity formed by a divider located on the base board. The exciting light can enter into the cavity including a phosphor layer contained in the wavelength converting module and can emit a mixture light using the phosphor layer in only one cavity. Thus, the semiconductor light-emitting apparatus using the wavelength converting module can emit various color lights having a high light-intensity and a substantially uniform color tone in order to be able to be used for vehicle lamp such as a headlight, general lighting, a stage light, a street light, a projector, etc.

First claim

What is claimed is:

1. A wavelength converting module, comprising:
a base board having a board top surface formed in a substantially planar shape;
a divider having a divider top surface, a divider side surface, a height, a first divider and a second divider located on the board top surface of the base board, each of the first divider and the second divider intersecting at a substantially right angle with respect each other, the divider side surface of the divider located between the divider top surface of the divider and the board top surface of the base board, and the divider top surface of the divider located in a substantially parallel direction with the board top surface of the base board;
a cavity formed on the board top surface of the base board by surrounding the cavity with the first divider and the second divider, and formed in a substantially rectangular shape as viewed from an opposite direction of the board top surface of the base board; and
a phosphor layer having a thickness including at least one of a red phosphor, a green phosphor, a blue phosphor and a yellow phosphor, formed on the divider top surface of the divider and the board top surface of the base board, and wherein the thickness of the phosphor layer is lower than the height of the divider.

2. The wavelength converting module according to claim 1 , wherein the base board includes at least one of a metal, an oxide ceramic and a non oxide ceramic.

3. The wavelength converting module according to claim 1 , wherein the divider is made from a substantially same material as that of the base board.

4. The wavelength converting module according to claim 1 , wherein the divider is integrated into the base board.

5. The wavelength converting module according to claim 1 , wherein the base board is exposed partially from the phosphor layer located adjacent at least one of the first divider and the second divider.

6. The wavelength converting module according to claim 1 , when the divider top surface of the divider includes at least one concave portion toward the board top surface of the base board.

7. The wavelength converting module according to claim 1 , wherein each of the first divider and the second divider of the divider is located in a direction substantially perpendicular to the board top surface of the base board, and the phosphor layer is formed also around the divider side surface continuously between the phosphor layer located on the divider top surface of the divider and the phosphor layer located on the board top surface of the base board.

8. The wavelength converting module according to claim 1 , wherein the divider top surface of the divider narrows from the divider top surface of the divider toward the board top surface of base board.

9. The wavelength converting module according to claim 1 , wherein at least one of the first divider and the second divider of the divider is inclined with respect to the board top surface of the base board in parallel.

10. The wavelength converting module according to claim 9 , the phosphor layer is formed also around the divider side surface of the at least one of the first divider and the second divider of the divider, which is inclined at a blunt angle with respect to the board top surface of the base board, continuously between the phosphor layer located on the divider top surface of the divider and the phosphor layer located on the board top surface of the base board.

11. A semiconductor light-emitting apparatus including the wavelength converting module according to claim 1 , further comprising:
a semiconductor light source configured to emit an exciting light;
an optical reflector configured to receive the exciting light emitted from the semiconductor light source, and configured to reflect the exciting light toward the wavelength converting module;
a casing having an opening attaching the semiconductor light source, the optical reflector and the wavelength converting module; and
wherein the wavelength converting module is configured to receive the exciting light emitted from the semiconductor light source via the optical reflector, configured to wavelength-convert the exciting light into light having a longer light-emitting wavelength than that of the exciting, and is configured to emit a mixture light having a light-emitting direction, which mixes a part of the exciting light with the light having the longer light-emitting wavelength than that of the exciting light, toward the opening of the casing.

12. The semiconductor light-emitting apparatus according to claim 11 , further comprising:
a projector lens having an optical axis attached to the opening of the casing, and the optical axis of the projector lens corresponding to substantially the light-emitting direction of the mixture light emitted from the wavelength converting module.

13. The semiconductor light-emitting apparatus according to claim 11 , further comprising:
an outer lens attached to the opening of the casing.

14. The semiconductor light-emitting apparatus according to claim 11 , wherein the semiconductor light source includes at least one of a blue light-emitting diode emitting blue light, a ultraviolet light-emitting diode emitting ultraviolet light, a blue laser diode emitting a blue laser beam and a ultraviolet laser diode emitting ultraviolet light.

15. The semiconductor light-emitting apparatus according to claim 11 , further comprising:
a controller configured to control the semiconductor light source to emit the exciting light, and configured to control a movable micro electro mechanical systems (MEMS) mirror used as the optical reflector, wherein the movable MEMS mirror scans the exciting light toward the wavelength converting module in two dimensional directions.

16. A semiconductor light-emitting apparatus including the wavelength converting module according to claim 1 , further comprising:
a semiconductor light source configured to emit an exciting light;
an optical reflector configured to receive the exciting light emitted from the semiconductor light source, and configured to reflect the exciting light toward the wavelength converting module;
a casing having an opening attaching the semiconductor light source, the optical reflector and the wavelength converting module; and
wherein the wavelength converting module is configured to receive the exciting light emitted from the semiconductor light source via the optical reflector, configured to wavelength-convert the exciting light into lights each having a longer light-emitting wavelength than that of the exciting, and is configured to emit a mixture light having a light-emitting direction, which mixes the lights each having the longer light-emitting wavelength than that of the exciting light, toward the opening of the casing.

17. The semiconductor light-emitting apparatus according to claim 16 , further comprising:
a projector lens having an optical axis attached to the opening of the casing, and the optical axis of the projector lens corresponding to substantially the light-emitting direction of the mixture light emitted from the wavelength converting module.

18. The semiconductor light-emitting apparatus according to claim 16 , further comprising:
an outer lens attached to the opening of the casing.

19. The semiconductor light-emitting apparatus according to claim 16 , wherein the semiconductor light source includes at least one of a blue light-emitting diode emitting blue light, a ultraviolet light-emitting diode emitting ultraviolet light, a blue laser diode emitting a blue

Assignees

• Stanley Electric Co Ltd
• Stanley Electric Co Ltd

Inventors

• Owada Soji

Classifications

• F21W2131/406

  for theatres, stages or film studios · CPC title

• F21S41/25

  Projection lenses · CPC title

• C09K11/7773

  with alkali or alkaline earth metal · CPC title

• F21V14/04

  by movement of reflectors {(in vehicle head lamps F21S41/675)} · CPC title

• F21W2131/103

  of streets or roads · CPC title