Broadened spectrum laser diode for display device
AssigneeMicrosoft Technology Licensing, LLC
InventorsShiva Shahin, Dale Eugene Zimmerman
Life of this patent
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Abstract
A broad-spectrum laser for use in a MEMS laser scanning display device is provided. In one example, the broad-spectrum laser includes a laser diode emitter with plural quantum wells each having a different spectral peak. In another example, the broad-spectrum laser includes a laser diode emitter with a tunable absorber to achieve a broadened emissions spectrum. In another example, the broad-spectrum laser includes a laser diode emitter array having plural individual emitters with different spectral peaks.
Claims18
A micro-electro-mechanical system (MEMS) laser scanning display device, comprising:
- a display;
- a laser light source, including:
- an emitter array including a plurality of laser diode emitters, each laser diode emitter being configured to emit a respective different wavelength of light to thereby form a broadband light beam with a broadband emission spectrum, wherein the broadband emission spectrum includes a plurality of peaks;
- and
- a MEMS scanning mirror configured to guide the light beam via a wave guide with an in-coupling grating and out-coupling grating to achieve a scanning pattern across the display and thereby form a displayed image, wherein:
- the laser light source includes a substrate having a plurality of deposition regions on a top surface thereof;
- and
- each deposition region has a different surface normal formed orthogonally relative to a surface of the deposition region and at an angle relative to a planar bottom surface of the substrate.
A method of forming a displayed image at a micro-electro-mechanical system (MEMS) laser scanning display device, the method comprising:
- at each of a plurality of laser diode emitters included in an emitter array of a laser light source, emitting a respective different wavelength of light to thereby form a broadband light beam with a broadband emission spectrum, wherein the broadband emission spectrum includes a plurality of peaks;
- and
- using a MEMS scanning mirror, guiding the light beam via a wave guide with an in-coupling grating and out-coupling grating to achieve a scanning pattern across the display and thereby form the displayed image, wherein:
- the laser light source includes a substrate having a plurality of deposition regions on a top surface thereof;
- and
- each deposition region has a different surface normal formed orthogonally relative to a surface of the deposition region and at an angle relative to a planar bottom surface of the substrate.
A micro-electro-mechanical system (MEMS) laser scanning display device, comprising:
- a display;
- a laser light source, including:
- an emitter array including a plurality of laser diode emitters, each laser diode emitter being configured to emit a respective different wavelength of light to thereby form a broadband light beam with a broadband emission spectrum, wherein:
- the laser light source includes a substrate having a plurality of deposition regions on a top surface thereof;
- each deposition region has a different surface normal formed orthogonally relative to a surface of the deposition region and at an angle relative to a planar bottom surface of the substrate;
- each of the laser diode emitters includes a semiconductor material deposited on each of the deposition regions with surface normals of different angles in respective semiconductor regions;
- and
- the respective semiconductor regions of each of the laser diode emitters are configured to emit a respective different wavelength of light, to thereby form the broadband light beam with the broadband emission spectrum that includes a plurality of peaks;
- and
- a MEMS scanning mirror configured to guide the light beam via a wave guide to achieve a scanning pattern across the display and thereby form a displayed image.
Dependencies are inferred from the claim text.