US 11,940,617 B2
Drive circuit for resonant mirror scanning system
Chang Joon Park, Sunnyvale, CA (US); and Martin Francis Galinski, III, Mountain View, CA (US)
Assigned to Microsoft Technology Licensing, LLC, Redmond, WA (US)
Filed by Microsoft Technology Licensing, LLC, Redmond, WA (US)
Filed on Jul. 31, 2020, as Appl. No. 16/945,349.
Prior Publication US 2022/0035150 A1, Feb. 3, 2022
Int. Cl. B06B 1/02 (2006.01); G02B 26/08 (2006.01); G02B 26/10 (2006.01); G02B 27/01 (2006.01); H03H 7/01 (2006.01); H03H 7/00 (2006.01)
CPC G02B 26/0858 (2013.01) [B06B 1/0207 (2013.01); G02B 26/10 (2013.01); G02B 27/0176 (2013.01); H03H 7/1708 (2013.01); H03H 7/175 (2013.01); G02B 2027/0154 (2013.01); H03H 2007/006 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A display device, comprising:
a resonant scanning minor system comprising a scanning minor, a first mirror drive element, and a second minor drive element; and
a drive circuit configured to drive the scanning mirror at a resonant frequency, the drive circuit comprising
one or more signal sources configured to create a first source signal and a second source signal, the first source signal being 180 degrees out of phase with the second source signal;
a buffer stage configured to receive the first source signal and the second source signal and to output a first drive signal and a second drive signal;
a first resonant LC stage configured to amplify the first drive signal for provision to the first mirror drive element; and
a second resonant LC stage configured to amplify the second drive signal for provision to the second mirror drive element.