US 11,689,862 B2
Transparent electrostatic transducers
Harry Chou, Austin, TX (US); Jeff Maag, Belmont, CA (US); Burt Fowler, Buda, TX (US); and Lorance Wilson, San Jose, CA (US)
Assigned to GRAPHAUDIO INC., Beverly Hills, CA (US)
Appl. No. 17/273,942
Filed by GRAPHAUDIO INC., Beverly Hills, CA (US)
PCT Filed Sep. 6, 2019, PCT No. PCT/US2019/049860
§ 371(c)(1), (2) Date Mar. 5, 2021,
PCT Pub. No. WO2020/051401, PCT Pub. Date Mar. 12, 2020.
Claims priority of provisional application 62/728,099, filed on Sep. 7, 2018.
Prior Publication US 2021/0337316 A1, Oct. 28, 2021
Int. Cl. H04R 19/02 (2006.01); B32B 7/12 (2006.01); B32B 9/00 (2006.01); B32B 37/12 (2006.01); B32B 38/00 (2006.01); H04R 1/02 (2006.01); H04R 1/40 (2006.01); H04R 3/00 (2006.01); H04R 3/12 (2006.01); H04R 7/10 (2006.01); H04R 19/04 (2006.01); H04R 31/00 (2006.01)
CPC H04R 19/02 (2013.01) [B32B 7/12 (2013.01); B32B 9/007 (2013.01); B32B 37/12 (2013.01); B32B 38/145 (2013.01); H04R 1/028 (2013.01); H04R 1/403 (2013.01); H04R 1/406 (2013.01); H04R 3/005 (2013.01); H04R 3/12 (2013.01); H04R 7/10 (2013.01); H04R 19/04 (2013.01); H04R 31/00 (2013.01); B32B 2038/0064 (2013.01); B32B 2307/20 (2013.01); B32B 2307/412 (2013.01); B32B 2457/00 (2013.01); H04R 2307/023 (2013.01); H04R 2400/01 (2013.01); H04R 2499/15 (2013.01)] 29 Claims
OG exemplary drawing
 
1. An optically transparent or semi-transparent transducing device comprising:
an optically transparent or semi-transparent two-dimensional membrane electrostatic diaphragm having a plurality of atomic layers, wherein the electrostatic diaphragm absorbs less than 50% of incident light between wavelengths of 390 nm and 780 nm, wherein the electrostatic diaphragm is less than 30 atomic layers thick, wherein the electrostatic diaphragm comprises graphene;
a first and second optically transparent spacer, wherein each first and second spacer comprises a large round, sheet, or roll format with conductive patterning onto which one side of the electrostatic diaphragm is bonded, wherein the first and second spacer each have a substantially circular open region defining circular portions above and below the electrostatic diaphragm; and
a first and second transparent electrode, wherein each first and second transparent electrode comprises a large round, sheet, or roll format with conductive patterning, wherein the first and second transparent electrodes are arranged on opposite sides of the electrostatic diaphragm proximate to one side of the electrostatic diaphragm and the first or second spacer.