High-luminous flux laser-based white light source

Patent metadata

Field	Value
Publication number	US-11437774-B2
Application number	US-201916449126-A
Country	US
Kind code	B2
Filing date	Jun 21, 2019
Priority date	Aug 19, 2015
Publication date	Sep 6, 2022
Grant date	Sep 6, 2022

Abstract

The embodiments described herein provide a high-luminous flux laser-based white light source. A plurality of laser packages are arranged in an array pattern on a common support member. The plurality of laser packages each include one or more laser diode devices and a phosphor member. The phosphor member converts a fraction of the electromagnetic radiation from each of the laser diode devices to an emitted electromagnetic radiation and a white light is outputted.

First claim

What is claimed is:

1. A high-luminous flux laser-based white light source comprising:
an electronic board member; and
a plurality of surface mount device (SMD) packages arranged in an array pattern and electrically coupled to the electronic board member, each of the plurality of SMD packages including:
one or more laser diode devices each comprising a cavity member of gallium and nitrogen containing material and configured as an excitation source;
a phosphor member configured as a wavelength converter and an emitter and coupled to the one or more laser diode devices;
at least one common support member configured to support the one or more laser diode devices and the phosphor member, the at least one common support member including one or more angled portions and a planar portion, each angled portion for supporting a laser diode device of the one or more laser diode devices, and the planar portion for supporting the phosphor member, wherein an upper surface of each angled portion is at an obtuse angle relative to an upper surface of the planar portion, and the upper surface of each angled portion is arranged between relief features and is at a reflex angle relative to upper surfaces of the relief features, wherein the relief features are arranged on sides of the upper surface of each angled portion in a direction perpendicular to a length of the cavity member of the laser diode device supported by the angled portion;
one or more submount members, each of the one or more submount members configured with one of the one or more laser diode devices to form a chip on submount structure, each of the one or more submount members extending between one of the one or more laser diode devices and the at least one common support member and providing electrical isolation between the one of the one or more laser diode devices and the at least one common support member;
an output facet configured on each of the one or more laser diode devices to output a laser beam comprised of electromagnetic radiation selected from a violet and/or a blue emission with a first wavelength ranging from 400 nm to 485 nm;
a free space, extending from the output facet on each of the one or more laser diode devices to the phosphor member, the free space having a non-guided characteristic capable of transmitting the laser beam from the output facet to an excitation surface of the phosphor member;
a range of angles of incidence between the laser beam from each of the one or more laser diode devices and the excitation surface of the phosphor member so that on average the laser beam has an off-normal incidence to the excitation surface and a beam spot is configured for a certain geometrical size and shape;
wherein the phosphor member converts a fraction of the electromagnetic radiation from each of the one or more laser diode devices to an emitted electromagnetic radiation with a second wavelength that is longer than the first wavelength;
a reflective mode characterizing the phosphor member such that the laser beam from each of the one or more laser diode devices is incident on a beam spot area on the excitation surface of the phosphor member and a white light emission is outputted substantially from the same beam spot area so that the excitation surface of the phosphor member is a primary emission surface of the phosphor member, the white light emission being comprised of a mixture of wavelengths characterized by at least the emitted electromagnetic radiation with the second wavelength; and
a transparent lid member arranged such that the transparent lid member forms a sealed region around the one or more laser diode devices and the phosphor member, the transparent lid member allowing the white light emission to exit the SMD package along a primary white light emission axis, the primary emission surface of the phosphor member extending substantially orthogonal to the primary white light emission axis.

2. The high-luminous flux laser-based white light source of claim 1 , wherein the electronic board member comprises a heat sink, and the plurality of SMD packages are configured to transport thermal energy from the one or more laser diode devices and from the phosphor member to the heat sink.

3. The high-luminous flux laser-based white light source of claim 1 , wherein the plurality of SMD packages are arranged in at least one of a one-dimensional (1D) array pattern on the electronic board member, or a two-dimensional (2D) array pattern of on the electronic board member.

4. The high-luminous flux laser-based white light source of claim 1 , further comprising a plurality of optical members, wherein one or more of the plurality of optical members are coupled to the white light emission outputted from the phosphor member of each of the plurality of the SMD packages.

5. The high-luminous flux laser-based white light source of claim 4 , wherein the plurality of optical members include collimating optics configured to collect the white light emission and focus the white light emission in a collimated and/or direction emission pattern.

6. The high-luminous flux laser-based white light source of claim 1 , further comprising one or more common optical members coupled to the white light emission outputted from the phosphor member of each of the plurality of SMD packages.

7. The high-luminous flux laser-based white light source of claim 6 , wherein the one or more common optical members include a lens array having a unique lens element associated with the white light emission outputted from the phosphor member of each of the plurality of the SMD packages.

8. The high-luminous flux laser-based white light source of claim 1 , further comprising optics coupled to the white light emission outputted from the phosphor member of each of the plurality of the SMD packages, wherein the optics are configured to shape the white light emission into a predetermined pattern.

9. The high-luminous flux laser-based white light source of claim 1 , further comprising active optical elements coupled to the white light emission outputted from the phosphor member of each of the plurality of SMD packages, wherein the active optical elements are configured to dynamically shape the white light emission into different predetermined patterns.

10. The high-luminous flux laser-based white light source of claim 1 , wherein the laser beam from at least one of the one or more laser diode devices is modulated with a predetermined data pattern to generate a signal for wireless data transmission.

11. The high-luminous flux laser-based white light source of claim 1 , further comprising a plurality of electronic board members in addition to the electronic board member, wherein each of the plurality of SMD packages are coupled to one of the plurality of electronic board members, and each of the plurality of electronic board members are coupled to the electronic board member.

12. The high-luminous flux laser-based white light source of claim 1 , wherein the phosphor member includes a plurality of scattering centers to scatter the electromagnetic radiation with the first wavelength from the laser beam incident on the phosphor member.

13. The high-luminous flux laser-based white light source of claim 1 , wherein the phosphor member is comprised of a ceramic yttrium aluminum garnet (YAG) doped with Ce or a single crystal YAG doped with Ce or a powdered YAG comprising a binder material; wherein the phosphor member has an optical conversion efficiency of greater than 50 lumen per optical watt.

14. A high-luminous flux laser-based white light source comprising:
an electronic board member; and
a plurality of laser packages arranged in an a

Assignees

• Kyocera Sld Laser Inc

Inventors

• Rudy Paul
• Raring James W
• Goutain Eric
• Trottier Troy
• Mclaurin Melvin
• Harrison James
• Heikman Sten
• Cantore Michael

Classifications

• H01S5/02345

  Wire-bonding · CPC title

• H01S5/0216

  using an intermediate compound, e.g. a glue or solder · CPC title

• H01S5/0237

  by soldering · CPC title

• F21K9/68

  Details of reflectors forming part of the light source · CPC title

• H01S5/320275

  semi-polar orientation · CPC title