Microsoft patents laser display using multiple light colors
Microsoft has been granted a patent for a laser display system that uses a group of laser diodes emitting different wavelengths of light. These individual beams combine to create a single, broad-spectrum light source that a tiny mirror scans across a screen to form an image.
In the filing’s own words
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.
What exactly they claim (claim 1)
1. 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.
Facts
- Company
- Microsoft (Microsoft Technology Licensing, LLC)
- Official title
- Broadened spectrum laser diode for display device
- Patent number
- US12749869B2
- Application number
- 18313519
- Filed
- May 8, 2023
- Granted
- Sep 29, 2026
- Inventors
- 2
- Claims
- 18
Classified under
H01S 5/1096 Electricity & electronicsG02B 26/0833 Physics & computingG02B 26/10 Physics & computingG02B 27/0172 Physics & computingH01S 5/026 Electricity & electronicsH01S 5/0265 Electricity & electronicsMore from Microsoft in AR, VR & displays
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Summaries are simplified from the filing’s own abstract and first claim. A patent filing is not a product announcement.
Patent data and drawings: U.S. Patent and Trademark Office (USPTO). Nebula is not affiliated with or endorsed by the USPTO.