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US 12,218,477 B2Granted
High-luminous flux laser-based white light source
AssigneeKYOCERA SLD Laser, Inc.
InventorsPaul Rudy, James W. Raring, Eric Goutain, Troy Trottier, Melvin McLaurin, James Harrison, Sten Heikman, Michael Cantore
Life of this patent
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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.
Claims20
A high-luminous flux laser-based white light source comprising:
- a plurality of surface mount device (SMD) packages;
- and
- a plurality of electronic board members, the plurality of SMD packages arranged in an array pattern and each electrically coupled to one of the plurality of electronic board members, 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, 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, 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, and wherein a width of the upper surfaces of the relief features varies in the direction perpendicular to the length of the cavity 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;
- and
- 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, the white light emission being comprised of a mixture of wavelengths characterized by at least the emitted electromagnetic radiation with the second wavelength.
9 more elements
A high-luminous flux laser-based white light source comprising:
- a power source;
- and
- a plurality of laser packages arranged in an array pattern and electrically coupled to the power source, each of the plurality of laser 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, the at least one common support member including two 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, 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, and wherein a width of the upper surfaces of the relief features varies in the direction perpendicular to the length of the cavity 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, between the output facet on each of the one or more laser diode devices and the phosphor member with 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;
- and
- 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, the white light emission being comprised of a mixture of wavelengths characterized by at least the emitted electromagnetic radiation with the second wavelength.
9 more elements
A high-luminous flux laser-based white light source comprising:
- a power source;
- and
- a plurality of surface mount device (SMD) packages arranged in an array pattern and electrically coupled to the power source, 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, the at least one common support member including two 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, 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, and wherein a width of the upper surfaces of the relief features varies in the direction perpendicular to the length of the cavity 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, between the output facet on each of the one or more laser diode devices and the phosphor member with 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 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 plurality of scattering centers associated with the phosphor member to scatter the electromagnetic radiation with the first wavelength incident on the phosphor member;
- and
- wherein a white light emission is outputted substantially from the phosphor member, the white light emission being characterized by at least the emitted electromagnetic radiation with the second wavelength.
10 more elements
Dependencies are inferred from the claim text.